WO2019017496A1 - Machine électrique tournante - Google Patents

Machine électrique tournante Download PDF

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Publication number
WO2019017496A1
WO2019017496A1 PCT/JP2018/027409 JP2018027409W WO2019017496A1 WO 2019017496 A1 WO2019017496 A1 WO 2019017496A1 JP 2018027409 W JP2018027409 W JP 2018027409W WO 2019017496 A1 WO2019017496 A1 WO 2019017496A1
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WIPO (PCT)
Prior art keywords
armature
dimension
axis
pole
magnet unit
Prior art date
Application number
PCT/JP2018/027409
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English (en)
Japanese (ja)
Inventor
高橋　裕樹
谷口　真
Original Assignee
株式会社デンソー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2017255053A external-priority patent/JP6939543B2/ja
Application filed by 株式会社デンソー filed Critical 株式会社デンソー
Priority to DE112018003744.4T priority Critical patent/DE112018003744T5/de
Priority to CN201880048681.5A priority patent/CN110945755B/zh
Priority claimed from JP2018137221A external-priority patent/JP6658812B2/ja
Publication of WO2019017496A1 publication Critical patent/WO2019017496A1/fr
Priority to US16/748,535 priority patent/US11843334B2/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation

Definitions

  • Japanese Patent Application No. 2018-137218 filed on July 20, 2018, Japanese Patent Application No. 2018-137219 filed on July 20, 2018, and Japanese Patent Application No. 2018 on 20 July 2018.
  • Japanese Application No. 2018-137220 Japanese Application No. 2018-137221 filed on July 20, 2018, and Japanese Application No. 2018-137222 filed on July 20, 2018, 2018 Japanese Application No. 2018-137223 filed on July 20, 2008 Japanese Application No. 2018-137224 filed on July 20, 2018, and Japanese Application No. filed July 20, 2018 Japanese Patent Application Nos. 2018-137225 filed on July 20, 2018, and Japanese Patent Application Nos. Japanese Application No. 2018-137227 filed on July 20, 2008 Japanese Application No. 2018-137228 filed on July 20, 2018, and Japanese Application No. filed July 20, 2018 2018-137229, Japanese Application No.
  • the disclosure in this specification relates to a rotating electrical machine.
  • Patent Document 1 discloses a technique for increasing the surface magnetic flux density of the rotor and increasing the torque by devising the orientation direction of each permanent magnet and the arrangement of each permanent magnet.
  • the present invention has been made in view of the above-mentioned circumstances, and a main object thereof is to provide a rotating electrical machine that improves torque by suppressing magnetic flux leakage and eddy current loss.
  • the first disclosure is A magnetic field generation unit having a cylindrical magnet unit provided with a plurality of magnetic poles having an N pole and an S pole, wherein the N pole and the S pole are alternately arranged in the circumferential direction; An armature having a polyphase armature winding; And a rotor comprising any of the magnetic field generation unit and the armature,
  • the magnet unit has a first part and a second part, and the first part is closer to the d axis of the dq axis coordinate system than the second part, and the second part is the dq axis coordinate system from the first part Close to the q axis of
  • the magnet unit is magnetic so that an angle formed by the easy magnetization axis in the first portion with the d axis satisfies a condition such that an easy magnetization axis in the second portion is smaller than an angle formed with the q axis.
  • the magnetic field generation unit has an intrinsic coercivity of 400 kA / m and a residual magnetic flux density of 1.0 T or more
  • the armature winding has a plurality of conductive members opposed to the magnetic field generation unit, and arranged at predetermined intervals in the circumferential direction of the armature,
  • the armature winding is formed to have a predetermined first dimension and a second dimension, and the first dimension is a distance between the outer surface and the inner surface facing each other in the radial direction of the armature.
  • the second dimension is a circumferential length of the armature of a portion of the armature winding functioning as one in the polyphase of the armature, and the first dimension is the second dimension Smaller than
  • Each of the armature windings has a plurality of inter-lead members disposed between adjacent ones of the conductive members of the armature winding, and magnetically functions with one of the magnetic poles of the magnet unit of the armature winding.
  • the inter-conductor member is Wt ⁇ Bs ⁇ Wm ⁇ Br
  • the conductive members are arranged at predetermined intervals in the circumferential direction of the armature, and a nonmagnetic material is disposed between adjacent conductive members, and the nonmagnetic material occupies all the predetermined intervals.
  • Each of the conductive members comprises a plurality of bundled strands;
  • the strands of each of the conductive members are adjacent in contact with each other, and each two adjacent strands have a first electrical resistivity in the adjacent direction, and each of the strands is It has a second electrical resistivity in the length direction, and the first electrical resistivity is greater than the second electrical resistivity.
  • the surface magnetic flux density of the magnet unit can be suitably improved as compared with the case where the magnetization easy axes are similarly oriented on the d axis side and the q axis side. . Further, by setting the armature in the above-mentioned configuration, magnetic saturation can be suppressed on the armature side.
  • the stator and the stator coil are compared with the case where an armature winding in which the first dimension is larger than the second dimension is employed.
  • the magnetic reluctance with the rotor is reduced.
  • the area of the conductive member of the armature winding to receive the magnetic flux can be increased. That is, the amount of magnetic flux interlinked with the conductive member can be increased to suppress magnetic flux leakage.
  • the amount of magnetic flux interlinked with the conductive member increases in order to suppress the magnetic flux leakage while improving the surface magnetic flux density of the magnet unit.
  • the eddy current loss will increase as the amount of magnetic flux linked to the conductive member increases.
  • each of the conductive members is composed of a plurality of bundled strands, and the respective strands of the conductive members are adjacent to each other in a contact state.
  • Each two adjacent strands have a first electrical resistivity in their adjacent direction, each of the strands has a second electrical resistivity in their length direction, and the first electrical resistivity is the second electrical resistivity. Greater than resistivity. As a result, generation of eddy current can be further suppressed in the conductive member.
  • each of the conductive members has a predetermined dimension in the radial direction of the armature, and each of the nonmagnetic members has the dimension in the radial direction of the armature between the adjacent conductive members. It may occupy a range of at least three quarters.
  • the first disclosure can also be expressed as follows.
  • a field element having a magnet portion including a plurality of magnetic poles of alternating polarity in a circumferential direction, and an armature having a multiphase armature winding, any one of the field element and the armature being A rotating electric machine that is considered as a rotor,
  • the magnet unit is configured such that on the side of the d axis which is the center of the magnetic pole, the direction of the easy magnetization axis is parallel to the d axis as compared to the side of the q axis which is the magnetic pole boundary.
  • the magnet unit has an intrinsic coercivity of 400 kA / m or more, and a residual magnetic flux density of 1.0 T or more
  • the armature winding has conducting wire portions arranged at predetermined intervals in a circumferential direction at a position facing the field element, The wire portion has a radial thickness smaller than a circumferential width of one phase in one magnetic pole,
  • An inter-conductor member is provided between the conductor portions in the circumferential direction, and as the inter-conductor member, the circumferential width dimension of the inter-conductor member in one magnetic pole is Wt, and the saturation flux density of the inter-conductor member is Bs.
  • the inter-conductor member is not provided between the conductor portions in the circumferential direction,
  • Each of the conductive wires constituting the conductive wire portion is a bundle of a plurality of strands (86) and is a bundle of strands whose resistance value between the bundled strands is larger than the resistance of the strands themselves. Rotating electrical machines.
  • the second disclosure is A magnetic field generation unit having a cylindrical magnet unit provided with a plurality of magnetic poles having an N pole and an S pole, wherein the N pole and the S pole are alternately arranged in the circumferential direction; An armature having a polyphase armature winding; And a rotor comprising any of the magnetic field generation unit and the armature,
  • the magnet unit has a first part and a second part, and the first part is closer to the d axis of the dq axis coordinate system than the second part, and the second part is the dq axis coordinate system from the first part Close to the q axis of
  • the magnet unit is magnetic so that an angle formed by the easy magnetization axis in the first portion with the d axis satisfies a condition such that an easy magnetization axis in the second portion is smaller than an angle formed with the q axis.
  • the magnetic field generation unit has an intrinsic coercivity of 400 kA / m and a residual magnetic flux density of 1.0 T or more
  • the armature winding has a plurality of conductive members opposed to the magnetic field generation unit, and arranged at predetermined intervals in the circumferential direction of the armature,
  • the armature winding is formed to have a predetermined first dimension and a second dimension, and the first dimension is a distance between the outer surface and the inner surface facing each other in the radial direction of the armature.
  • the second dimension is a circumferential length of the armature of a portion of the armature winding functioning as one in the polyphase of the armature, and the first dimension is the second dimension Smaller than
  • Each of the armature windings has a plurality of inter-lead members disposed between adjacent ones of the conductive members of the armature winding, and magnetically functions with one of the magnetic poles of the magnet unit of the armature winding.
  • the inter-conductor member is Wt ⁇ Bs ⁇ Wm ⁇ Br
  • the conductive members are arranged at predetermined intervals in the circumferential direction of the armature, and a nonmagnetic material is disposed between adjacent conductive members, and the nonmagnetic material occupies all the predetermined intervals. ing.
  • Patent Document 1 discloses a technique for increasing the surface magnetic flux density of the rotor and increasing the torque by devising the orientation direction of each permanent magnet and the arrangement of each permanent magnet.
  • a main object of the second disclosure is to provide a rotating electrical machine that suppresses magnetic flux leakage to improve torque.
  • the surface magnetic flux density of the magnet unit is preferably compared to the case where the magnetization easy axes are similarly oriented on the d axis side and the q axis side. Can be improved. Further, by setting the armature in the above-mentioned configuration, magnetic saturation can be suppressed on the armature side.
  • the stator and the stator are compared with the case where an armature winding in which the first dimension is larger than the second dimension is employed.
  • the magnetic reluctance with the rotor is reduced.
  • the area of the conductive member of the armature winding to receive the magnetic flux can be increased. That is, the amount of magnetic flux interlinked with the conductive member can be increased to suppress magnetic flux leakage.
  • the third disclosure is A magnetic field generation unit having a cylindrical magnet unit provided with a plurality of magnetic poles having an N pole and an S pole, wherein the N pole and the S pole are alternately arranged in the circumferential direction; An armature having a polyphase armature winding; And a rotor comprising any of the magnetic field generation unit and the armature,
  • the magnet unit has a first part and a second part, and the first part is closer to the d axis of the dq axis coordinate system than the second part, and the second part is the dq axis coordinate system from the first part Close to the q axis of
  • the magnet unit is magnetic so that an angle formed by the easy magnetization axis in the first portion with the d axis satisfies a condition such that an easy magnetization axis in the second portion is smaller than an angle formed with the q axis.
  • the magnetic field generation unit has an intrinsic coercivity of 400 kA / m and a residual magnetic flux density of 1.0 T or more
  • the armature winding has a plurality of conductive members opposed to the magnetic field generation unit, and arranged at predetermined intervals in the circumferential direction of the armature,
  • the armature winding is formed to have a predetermined first dimension and a second dimension, and the first dimension is a distance between the outer surface and the inner surface facing each other in the radial direction of the armature.
  • the second dimension is a circumferential length of the armature of a portion of the armature winding functioning as one in the polyphase of the armature, and the first dimension is the second dimension Smaller than
  • Each of the conductive members comprises a plurality of bundled strands; The strands of each of the conductive members are adjacent in contact with each other, and each two adjacent strands have a first electrical resistivity in the adjacent direction, and each of the strands is It has a second electrical resistivity in the length direction, and the first electrical resistivity is greater than the second electrical resistivity.
  • Patent Document 1 discloses a technology for increasing the surface magnetic flux density of the rotor and increasing the torque by devising the orientation direction of each permanent magnet and the arrangement of each permanent magnet.
  • a main object of the third disclosure is to provide a rotating electrical machine in which torque is improved by suppressing magnetic flux leakage and eddy current loss.
  • the surface magnetic flux density of the magnet unit is preferably compared to the case where the magnetization easy axis is oriented in the same manner on the d axis side and the q axis side. Can be improved.
  • the stator and the stator coil are compared with the case where an armature winding in which the first dimension is larger than the second dimension is employed.
  • the magnetic reluctance with the rotor is reduced.
  • the area of the conductive member of the armature winding to receive the magnetic flux can be increased. That is, the amount of magnetic flux interlinked with the conductive member can be increased to suppress magnetic flux leakage.
  • the amount of magnetic flux interlinked with the conductive member increases in order to suppress the magnetic flux leakage while improving the surface magnetic flux density of the magnet unit.
  • the eddy current loss will increase as the amount of magnetic flux linked to the conductive member increases.
  • each of the conductive members is composed of a plurality of bundled strands, and the respective strands of the conductive members are adjacent to each other in a contact state.
  • Each two adjacent strands have a first electrical resistivity in their adjacent direction, each of the strands has a second electrical resistivity in their length direction, and the first electrical resistivity is the second electrical resistivity. Greater than resistivity. As a result, generation of eddy current can be further suppressed in the conductive member.
  • the fourth disclosure is A magnetic field generation unit having a cylindrical magnet unit provided with a plurality of magnetic poles having an N pole and an S pole, wherein the N pole and the S pole are alternately arranged in the circumferential direction; An armature having a polyphase armature winding; And a rotor comprising any of the magnetic field generation unit and the armature,
  • the magnet unit has a first part and a second part, and the first part is closer to the d axis of the dq axis coordinate system than the second part, and the second part is the dq axis coordinate system from the first part Close to the q axis of
  • the magnet unit is magnetic so that an angle formed by the easy magnetization axis in the first portion with the d axis satisfies a condition such that an easy magnetization axis in the second portion is smaller than an angle formed with the q axis.
  • the armature winding has a plurality of conductive members opposed to the magnetic field generation unit, and arranged at predetermined intervals in the circumferential direction of the armature,
  • the armature winding is formed to have a predetermined first dimension and a second dimension, and the first dimension is a distance between the outer surface and the inner surface facing each other in the radial direction of the armature.
  • the second dimension is a circumferential length of the armature of a portion of the armature winding functioning as one in the polyphase of the armature, and the first dimension is the second dimension Smaller than
  • Each of the armature windings has a plurality of inter-lead members disposed between adjacent ones of the conductive members of the armature winding, and magnetically functions with one of the magnetic poles of the magnet unit of the armature winding.
  • the inter-conductor member is Wt ⁇ Bs ⁇ Wm ⁇ Br
  • the conductive members are arranged at predetermined intervals in the circumferential direction of the armature, and a nonmagnetic material is disposed between adjacent conductive members, and the nonmagnetic material occupies all the predetermined intervals.
  • Each of the conductive members comprises a plurality of bundled strands;
  • the strands of each of the conductive members are adjacent in contact with each other, and each two adjacent strands have a first electrical resistivity in the adjacent direction, and each of the strands is It has a second electrical resistivity in the length direction, and the first electrical resistivity is greater than the second electrical resistivity.
  • Patent Document 1 discloses a technology for increasing the surface magnetic flux density of the rotor and increasing the torque by devising the orientation direction of each permanent magnet and the arrangement of each permanent magnet.
  • a main object of the fourth disclosure is to provide a rotating electrical machine that suppresses a magnetic flux leakage and an eddy current loss to improve torque.
  • the surface magnetic flux density of the magnet unit is preferably compared to the case where the magnetization easy axis is oriented in the same manner on the d axis side and the q axis side. Can be improved. Further, by setting the armature in the above-mentioned configuration, magnetic saturation can be suppressed on the armature side. As a result, since magnetic saturation can be suppressed while improving the surface magnetic flux density of the magnet unit, the amount of magnetic flux interlinked with the conductive member of the armature winding can be increased.
  • each of the conductive members is composed of a plurality of bundled strands, and the respective strands of the conductive members are adjacent to each other in a contact state.
  • Each two adjacent strands have a first electrical resistivity in their adjacent direction, each of the strands has a second electrical resistivity in their length direction, and the first electrical resistivity is the second electrical resistivity. Greater than resistivity. As a result, generation of eddy current can be further suppressed in the conductive member.
  • the fifth disclosure is A magnetic field generation unit having a cylindrical magnet unit provided with a plurality of magnetic poles having an N pole and an S pole, wherein the N pole and the S pole are alternately arranged in the circumferential direction;
  • An armature having a polyphase armature winding;
  • a rotor comprising any of the magnetic field generation unit and the armature,
  • the magnetic field generation unit has an intrinsic coercivity of 400 kA / m and a residual magnetic flux density of 1.0 T or more
  • the armature winding has a plurality of conductive members opposed to the magnetic field generation unit, and arranged at predetermined intervals in the circumferential direction of the armature,
  • the armature winding is formed to have a predetermined first dimension and a second dimension, and the first dimension is a distance between the outer surface and the inner surface facing each other in the radial direction of the armature.
  • the second dimension is a circumferential length of the armature of a portion of the armature winding functioning as one in the polyphase of the armature, and the first dimension is the second dimension Smaller than
  • Each of the armature windings has a plurality of inter-lead members disposed between adjacent ones of the conductive members of the armature winding, and magnetically functions with one of the magnetic poles of the magnet unit of the armature winding.
  • the inter-conductor member is Wt ⁇ Bs ⁇ Wm ⁇ Br
  • the conductive members are arranged at predetermined intervals in the circumferential direction of the armature, and a nonmagnetic material is disposed between adjacent conductive members, and the nonmagnetic material occupies all the predetermined intervals.
  • Each of the conductive members comprises a plurality of bundled strands;
  • the strands of each of the conductive members are adjacent in contact with each other, and each two adjacent strands have a first electrical resistivity in the adjacent direction, and each of the strands is It has a second electrical resistivity in the length direction, and the first electrical resistivity is greater than the second electrical resistivity.
  • Patent Document 2 discloses a technology relating to a slotless type rotary electric machine in which a salient pole is not formed. According to this, the cogging torque resulting from the salient pole can be prevented.
  • a main object of the fifth disclosure is to provide a rotating electrical machine that suppresses magnetic flux leakage and eddy current loss, and efficiently improves torque.
  • the surface magnetic flux density of the magnet unit can be improved by using the magnet unit having the above configuration. Further, by making the armature in the above-mentioned configuration, even if the surface magnetic flux density of the magnet unit is improved, the magnetic saturation on the armature side is suppressed, so that the occurrence of magnetic flux leakage can be suppressed.
  • the stator and the stator coil are compared with the case where an armature winding in which the first dimension is larger than the second dimension is employed.
  • the magnetic reluctance with the rotor is reduced.
  • the area of the conductive member of the armature winding to receive the magnetic flux can be increased. That is, the amount of magnetic flux interlinked with the conductive member can be increased to suppress magnetic flux leakage.
  • each of the conductive members comprises a plurality of bundled strands, and the respective strands of the conductive members are adjacent to each other in a contact state.
  • Each two adjacent strands have a first electrical resistivity in their adjacent direction
  • each of the strands has a second electrical resistivity in their length direction
  • the first electrical resistivity is the second electrical resistivity. Greater than resistivity.
  • the sixth disclosure is A magnetic field generation unit having a cylindrical magnet unit provided with a plurality of magnetic poles having an N pole and an S pole, wherein the N pole and the S pole are alternately arranged in the circumferential direction; An armature having a polyphase armature winding; And a rotor comprising any of the magnetic field generation unit and the armature,
  • the magnet unit has a first part and a second part, and the first part is closer to the d axis of the dq axis coordinate system than the second part, and the second part is the dq axis coordinate system from the first part Close to the q axis of
  • the magnet unit is magnetic so that an angle formed by the easy magnetization axis in the first portion with the d axis satisfies a condition such that an easy magnetization axis in the second portion is smaller than an angle formed with the q axis.
  • the magnetic field generation unit has an intrinsic coercivity of 400 kA / m and a residual magnetic flux density of 1.0 T or more
  • the armature winding has a plurality of conductive members opposed to the magnetic field generation unit, and arranged at predetermined intervals in the circumferential direction of the armature, Each of the armature windings has a plurality of inter-lead members disposed between adjacent ones of the conductive members of the armature winding, and magnetically functions with one of the magnetic poles of the magnet unit of the armature winding.
  • the inter-conductor member is Wt ⁇ Bs ⁇ Wm ⁇ Br
  • the conductive members are arranged at predetermined intervals in the circumferential direction of the armature, and a nonmagnetic material is disposed between adjacent conductive members, and the nonmagnetic material occupies all the predetermined intervals.
  • Each of the conductive members comprises a plurality of bundled strands;
  • the strands of each of the conductive members are adjacent in contact with each other, and each two adjacent strands have a first electrical resistivity in the adjacent direction, and each of the strands is It has a second electrical resistivity in the length direction, and the first electrical resistivity is greater than the second electrical resistivity.
  • Patent Document 1 discloses a technology for increasing the surface magnetic flux density of the rotor and increasing the torque by devising the orientation direction of each permanent magnet and the arrangement of each permanent magnet.
  • a main object of the sixth disclosure is to provide a rotating electrical machine that improves torque by suppressing magnetic saturation and eddy current loss.
  • the surface magnetic flux density of the magnet unit is preferably compared to the case where the magnetization easy axis is similarly oriented on the d axis side and the q axis side. Can be improved. Further, by setting the armature in the above-mentioned configuration, magnetic saturation can be suppressed on the armature side. As a result, since magnetic saturation can be suppressed while improving the surface magnetic flux density of the magnet unit, the amount of magnetic flux interlinked with the conductive member of the armature winding can be increased.
  • each of the conductive members is composed of a plurality of bundled strands, and the respective strands of the conductive members are adjacent to each other in a contact state. Each two adjacent strands have a first electrical resistivity in their adjacent direction, each of the strands has a second electrical resistivity in their length direction, and the first electrical resistivity is the second electrical resistivity. Greater than resistivity. As a result, generation of eddy current can be further suppressed in the conductive member.
  • the seventh disclosure is A magnetic field generation unit having a cylindrical magnet unit provided with a plurality of magnetic poles having an N pole and an S pole, wherein the N pole and the S pole are alternately arranged in the circumferential direction; An armature having a polyphase armature winding; And a rotor comprising any of the magnetic field generation unit and the armature,
  • the magnet unit has a first part and a second part, and the first part is closer to the d axis of the dq axis coordinate system than the second part, and the second part is the dq axis coordinate system from the first part Close to the q axis of
  • the magnet unit is magnetic so that an angle formed by the easy magnetization axis in the first portion with the d axis satisfies a condition such that an easy magnetization axis in the second portion is smaller than an angle formed with the q axis.
  • the magnetic field generation unit has an intrinsic coercivity of 400 kA / m and a residual magnetic flux density of 1.0 T or more
  • the armature winding has a plurality of conductive members opposed to the magnetic field generation unit, and arranged at predetermined intervals in the circumferential direction of the armature,
  • the armature winding is formed to have a predetermined first dimension and a second dimension, and the first dimension is a distance between the outer surface and the inner surface facing each other in the radial direction of the armature.
  • the second dimension is a circumferential length of the armature of a portion of the armature winding functioning as one in the polyphase of the armature, and the first dimension is the second dimension Less than.
  • Patent Document 1 discloses a technique for increasing the surface magnetic flux density of the rotor and increasing the torque by devising the orientation direction of each permanent magnet and the arrangement of each permanent magnet.
  • the main object of the seventh disclosure is to provide a rotating electrical machine that suppresses magnetic flux leakage to improve torque.
  • the surface magnetic flux density of the magnet unit is preferably compared to the case where the magnetization easy axes are similarly oriented on the d axis side and the q axis side. Can be improved. Further, by adopting an armature winding in which the first dimension is smaller than the second dimension, the stator and the stator are compared with the case where an armature winding in which the first dimension is larger than the second dimension is employed. The magnetic reluctance with the rotor is reduced. At the same time, the area of the conductive member of the armature winding to receive the magnetic flux can be increased. That is, the amount of magnetic flux interlinked with the conductive member can be increased to suppress magnetic flux leakage. Therefore, by using the rotating electrical machine having the above-described configuration, it is possible to improve the surface magnetic flux density of the magnet unit while suppressing the magnetic flux leakage and efficiently improving the torque.
  • the eighth disclosure is A magnetic field generation unit having a cylindrical magnet unit provided with a plurality of magnetic poles having an N pole and an S pole, wherein the N pole and the S pole are alternately arranged in the circumferential direction; An armature having a polyphase armature winding; And a rotor comprising any of the magnetic field generation unit and the armature,
  • the magnet unit has a first part and a second part, and the first part is closer to the d axis of the dq axis coordinate system than the second part, and the second part is the dq axis coordinate system from the first part Close to the q axis of
  • the magnet unit is magnetic so that an angle formed by the easy magnetization axis in the first portion with the d axis satisfies a condition such that an easy magnetization axis in the second portion is smaller than an angle formed with the q axis.
  • the magnetic field generation unit has an intrinsic coercivity of 400 kA / m and a residual magnetic flux density of 1.0 T or more
  • the armature winding has a plurality of conductive members opposed to the magnetic field generation unit, and arranged at predetermined intervals in the circumferential direction of the armature, Each of the armature windings has a plurality of inter-lead members disposed between adjacent ones of the conductive members of the armature winding, and magnetically functions with one of the magnetic poles of the magnet unit of the armature winding.
  • the inter-conductor member is Wt ⁇ Bs ⁇ Wm ⁇ Br
  • the conductive members are arranged at predetermined intervals in the circumferential direction of the armature, and a nonmagnetic material is disposed between adjacent conductive members, and the nonmagnetic material occupies all the predetermined intervals. ing.
  • Patent Document 1 discloses a technology for increasing the surface magnetic flux density of the rotor and increasing the torque by devising the orientation direction of each permanent magnet and the arrangement of each permanent magnet.
  • a main object of the eighth disclosure is to provide a rotating electrical machine that suppresses magnetic saturation to improve torque.
  • the surface magnetic flux density of the magnet unit is preferably compared to the case where the magnetization easy axes are similarly oriented on the d axis side and the q axis side. Can be improved. And, by setting the armature in the above-mentioned configuration, magnetic saturation can be suppressed on the armature side. Therefore, by using the rotating electrical machine having the above configuration, it is possible to improve the surface magnetic flux density of the magnet unit while suppressing the magnetic saturation and efficiently improving the torque.
  • the ninth disclosure is A magnetic field generation unit having a cylindrical magnet unit provided with a plurality of magnetic poles having an N pole and an S pole, wherein the N pole and the S pole are alternately arranged in the circumferential direction; An armature having a polyphase armature winding; And a rotor comprising any of the magnetic field generation unit and the armature,
  • the magnet unit has a first part and a second part, and the first part is closer to the d axis of the dq axis coordinate system than the second part, and the second part is the dq axis coordinate system from the first part Close to the q axis of
  • the magnet unit is magnetic so that an angle formed by the easy magnetization axis in the first portion with the d axis satisfies a condition such that an easy magnetization axis in the second portion is smaller than an angle formed with the q axis.
  • the magnetic field generation unit has an intrinsic coercivity of 400 kA / m and a residual magnetic flux density of 1.0 T or more
  • the armature winding has a plurality of conductive members opposed to the magnetic field generation unit, and arranged at predetermined intervals in the circumferential direction of the armature, Each of the conductive members comprises a plurality of bundled strands; The strands of each of the conductive members are adjacent in contact with each other, and each two adjacent strands have a first electrical resistivity in the adjacent direction, and each of the strands is It has a second electrical resistivity in the length direction, and the first electrical resistivity is greater than the second electrical resistivity.
  • Patent Document 1 discloses a technology for increasing the surface magnetic flux density of the rotor and increasing the torque by devising the orientation direction of each permanent magnet and the arrangement of each permanent magnet.
  • the magnetic field emitted by the permanent magnet of the rotor is an alternating magnetic field when viewed from the stator winding because the rotor rotates. Then, when the AC magnetic field interlinks with the stator winding, an eddy current flows through the stator winding, generating an eddy current loss.
  • eddy current losses in the stator windings are expected to increase as the surface flux density of the rotor is increased. Therefore, when the surface magnetic flux density of the rotor is increased, it is necessary to appropriately suppress the eddy current loss which is expected to increase accordingly.
  • a main object of the ninth disclosure is to provide a rotating electrical machine capable of suppressing an eddy current loss.
  • the surface magnetic flux density of the magnet unit is preferably compared to the case where the magnetization easy axes are similarly oriented on the d axis side and the q axis side. Can be improved. At the same time, the surface magnetic flux density distribution is smoothed to suppress the generation of the eddy current and to suppress the eddy current loss.
  • Each of the conductive members is composed of a plurality of bundled strands, and the respective strands of the conductive members are adjacent to each other in a contact state.
  • Each two adjacent strands have a first electrical resistivity in their adjacent direction
  • each of the strands has a second electrical resistivity in their length direction
  • the first electrical resistivity is the second electrical resistivity. Greater than resistivity.
  • the eddy current hardly flows. Therefore, by using the rotating electrical machine having the above configuration, it is possible to suppress the eddy current loss while improving the surface magnetic flux density of the magnet unit.
  • the tenth disclosure is A magnetic field generation unit having a cylindrical magnet unit provided with a plurality of magnetic poles having an N pole and an S pole, wherein the N pole and the S pole are alternately arranged in the circumferential direction; An armature having a polyphase armature winding; And a rotor comprising any of the magnetic field generation unit and the armature,
  • the magnet unit has a first part and a second part, and the first part is closer to the d axis of the dq axis coordinate system than the second part, and the second part is the dq axis coordinate system from the first part Close to the q axis of
  • the magnet unit is magnetic so that an angle formed by the easy magnetization axis in the first portion with the d axis satisfies a condition such that an easy magnetization axis in the second portion is smaller than an angle formed with the q axis.
  • the armature winding has a plurality of conductive members opposed to the magnetic field generation unit, and arranged at predetermined intervals in the circumferential direction of the armature,
  • the armature winding is formed to have a predetermined first dimension and a second dimension, and the first dimension is a distance between the outer surface and the inner surface facing each other in the radial direction of the armature.
  • the second dimension is a circumferential length of the armature of a portion of the armature winding functioning as one in the polyphase of the armature, and the first dimension is the second dimension Smaller than
  • Each of the armature windings has a plurality of inter-lead members disposed between adjacent ones of the conductive members of the armature winding, and magnetically functions with one of the magnetic poles of the magnet unit of the armature winding.
  • the inter-conductor member is Wt ⁇ Bs ⁇ Wm ⁇ Br
  • the conductive members are arranged at predetermined intervals in the circumferential direction of the armature, and a nonmagnetic material is disposed between adjacent conductive members, and the nonmagnetic material occupies all the predetermined intervals. ing.
  • Patent Document 1 discloses a technology for increasing the surface magnetic flux density of the rotor and increasing the torque by devising the orientation direction of each permanent magnet and the arrangement of each permanent magnet.
  • a main object of the tenth disclosure is to provide a rotating electrical machine that improves torque by suppressing magnetic saturation and magnetic flux leakage.
  • the surface magnetic flux density of the magnet unit is preferred compared to the case where the magnetization easy axis is similarly oriented on the d axis side and the q axis side. Can be improved.
  • the stator and the stator coil are compared with the case where an armature winding in which the first dimension is larger than the second dimension is employed.
  • the magnetic reluctance with the rotor is reduced.
  • the area of the conductive member of the armature winding to receive the magnetic flux can be increased. That is, the amount of magnetic flux interlinked with the conductive member can be increased to suppress magnetic flux leakage.
  • the eleventh disclosure is A magnetic field generation unit having a cylindrical magnet unit provided with a plurality of magnetic poles having an N pole and an S pole, wherein the N pole and the S pole are alternately arranged in the circumferential direction; An armature having a polyphase armature winding; And a rotor comprising any of the magnetic field generation unit and the armature,
  • the magnet unit has a first part and a second part, and the first part is closer to the d axis of the dq axis coordinate system than the second part, and the second part is the dq axis coordinate system from the first part Close to the q axis of
  • the magnet unit is magnetic so that an angle formed by the easy magnetization axis in the first portion with the d axis satisfies a condition such that an easy magnetization axis in the second portion is smaller than an angle formed with the q axis.
  • the armature winding has a plurality of conductive members opposed to the magnetic field generation unit, and arranged at predetermined intervals in the circumferential direction of the armature,
  • the armature winding is formed to have a predetermined first dimension and a second dimension, and the first dimension is a distance between the outer surface and the inner surface facing each other in the radial direction of the armature.
  • the second dimension is a circumferential length of the armature of a portion of the armature winding functioning as one in the polyphase of the armature, and the first dimension is the second dimension Smaller than
  • Each of the conductive members comprises a plurality of bundled strands; The strands of each of the conductive members are adjacent in contact with each other, and each two adjacent strands have a first electrical resistivity in the adjacent direction, and each of the strands is It has a second electrical resistivity in the length direction, and the first electrical resistivity is greater than the second electrical resistivity.
  • Patent Document 1 discloses a technology for increasing the surface magnetic flux density of the rotor and increasing the torque by devising the orientation direction of each permanent magnet and the arrangement of each permanent magnet.
  • a main object of the eleventh disclosure is to provide a rotating electrical machine capable of suppressing magnetic flux leakage and eddy current loss.
  • the surface magnetic flux density of the magnet unit is preferably compared to the case where the magnetization easy axes are similarly oriented on the d axis side and the q axis side. Can be improved.
  • the stator and the stator coil are compared with the case where an armature winding in which the first dimension is larger than the second dimension is employed.
  • the magnetic reluctance with the rotor is reduced.
  • the area of the conductive member of the armature winding to receive the magnetic flux can be increased. That is, the amount of magnetic flux interlinked with the conductive member can be increased to suppress magnetic flux leakage.
  • the amount of magnetic flux interlinked with the conductive member increases in order to suppress the magnetic flux leakage while improving the surface magnetic flux density of the magnet unit.
  • the eddy current loss will increase as the amount of magnetic flux linked to the conductive member increases.
  • each of the conductive members is composed of a plurality of bundled strands, and the respective strands of the conductive members are adjacent to each other in a contact state.
  • Each two adjacent strands have a first electrical resistivity in their adjacent direction, each of the strands has a second electrical resistivity in their length direction, and the first electrical resistivity is the second electrical resistivity. Greater than resistivity. As a result, generation of eddy current can be further suppressed in the conductive member.
  • the twelfth disclosure is A magnetic field generation unit having a cylindrical magnet unit provided with a plurality of magnetic poles having an N pole and an S pole, wherein the N pole and the S pole are alternately arranged in the circumferential direction; An armature having a polyphase armature winding; And a rotor comprising any of the magnetic field generation unit and the armature,
  • the magnet unit has a first part and a second part, and the first part is closer to the d axis of the dq axis coordinate system than the second part, and the second part is the dq axis coordinate system from the first part Close to the q axis of
  • the magnet unit is magnetic so that an angle formed by the easy magnetization axis in the first portion with the d axis satisfies a condition such that an easy magnetization axis in the second portion is smaller than an angle formed with the q axis.
  • the armature winding has a plurality of conductive members opposed to the magnetic field generation unit, and arranged at predetermined intervals in the circumferential direction of the armature, Each of the armature windings has a plurality of inter-lead members disposed between adjacent ones of the conductive members of the armature winding, and magnetically functions with one of the magnetic poles of the magnet unit of the armature winding.
  • the inter-conductor member is Wt ⁇ Bs ⁇ Wm ⁇ Br
  • the conductive members are arranged at predetermined intervals in the circumferential direction of the armature, and a nonmagnetic material is disposed between adjacent conductive members, and the nonmagnetic material occupies all the predetermined intervals.
  • Each of the conductive members comprises a plurality of bundled strands;
  • the strands of each of the conductive members are adjacent in contact with each other, and each two adjacent strands have a first electrical resistivity in the adjacent direction, and each of the strands is It has a second electrical resistivity in the length direction, and the first electrical resistivity is greater than the second electrical resistivity.
  • Patent Document 1 discloses a technology for increasing the surface magnetic flux density of the rotor and increasing the torque by devising the orientation direction of each permanent magnet and the arrangement of each permanent magnet.
  • a main object of the twelfth disclosure is to provide a rotating electrical machine capable of suppressing magnetic saturation and eddy current loss.
  • the surface magnetic flux density of the magnet unit is preferably compared to the case where the magnetization easy axes are similarly oriented on the d axis side and the q axis side. Can be improved. Further, by setting the armature in the above-mentioned configuration, magnetic saturation can be suppressed on the armature side. As a result, since magnetic saturation can be suppressed while improving the surface magnetic flux density of the magnet unit, the amount of magnetic flux interlinked with the conductive member of the armature winding can be increased.
  • each of the conductive members is composed of a plurality of bundled strands, and the respective strands of the conductive members are adjacent to each other in a contact state. Each two adjacent strands have a first electrical resistivity in their adjacent direction, each of the strands has a second electrical resistivity in their length direction, and the first electrical resistivity is the second electrical resistivity. Greater than resistivity. As a result, generation of eddy current can be further suppressed in the conductive member.
  • the thirteenth disclosure is A magnetic field generation unit having a cylindrical magnet unit provided with a plurality of magnetic poles having an N pole and an S pole, wherein the N pole and the S pole are alternately arranged in the circumferential direction;
  • An armature having a polyphase armature winding;
  • a rotor comprising any of the magnetic field generation unit and the armature,
  • the magnetic field generation unit has an intrinsic coercivity of 400 kA / m and a residual magnetic flux density of 1.0 T or more
  • the armature winding has a plurality of conductive members opposed to the magnetic field generation unit, and arranged at predetermined intervals in the circumferential direction of the armature,
  • the armature winding is formed to have a predetermined first dimension and a second dimension, and the first dimension is a distance between the outer surface and the inner surface facing each other in the radial direction of the armature.
  • the second dimension is a circumferential length of the armature of a portion of the armature winding functioning as one in the polyphase of the armature, and the first dimension is the second dimension Smaller than
  • Each of the armature windings has a plurality of inter-lead members disposed between adjacent ones of the conductive members of the armature winding, and magnetically functions with one of the magnetic poles of the magnet unit of the armature winding.
  • the inter-conductor member is Wt ⁇ Bs ⁇ Wm ⁇ Br
  • the conductive members are arranged at predetermined intervals in the circumferential direction of the armature, and a nonmagnetic material is disposed between adjacent conductive members, and the nonmagnetic material occupies all the predetermined intervals. ing.
  • Patent Document 2 discloses a technology relating to a slotless type rotary electric machine in which a salient pole is not formed. According to this, the cogging torque resulting from the salient pole can be prevented.
  • a main object of the thirteenth disclosure is to provide a rotating electrical machine with improved torque.
  • the surface magnetic flux density of the magnet unit can be improved by using the magnet unit having the above configuration. Further, by making the armature in the above-mentioned configuration, even if the surface magnetic flux density of the magnet unit is improved, the magnetic saturation on the armature side is suppressed, so that the occurrence of magnetic flux leakage can be suppressed.
  • the stator and the stator are compared with the case where an armature winding in which the first dimension is larger than the second dimension is employed.
  • the magnetic reluctance with the rotor is reduced.
  • the area of the conductive member of the armature winding to receive the magnetic flux can be increased. That is, the amount of magnetic flux interlinked with the conductive member can be increased to suppress magnetic flux leakage.
  • the fourteenth disclosure is A magnetic field generation unit having a cylindrical magnet unit provided with a plurality of magnetic poles having an N pole and an S pole, wherein the N pole and the S pole are alternately arranged in the circumferential direction;
  • An armature having a polyphase armature winding;
  • a rotor comprising any of the magnetic field generation unit and the armature,
  • the magnetic field generation unit has an intrinsic coercivity of 400 kA / m and a residual magnetic flux density of 1.0 T or more
  • the armature winding has a plurality of conductive members opposed to the magnetic field generation unit, and arranged at predetermined intervals in the circumferential direction of the armature,
  • the armature winding is formed to have a predetermined first dimension and a second dimension, and the first dimension is a distance between the outer surface and the inner surface facing each other in the radial direction of the armature.
  • the second dimension is a circumferential length of the armature of a portion of the armature winding functioning as one in the polyphase of the armature, and the first dimension is the second dimension Smaller than
  • Each of the conductive members comprises a plurality of bundled strands; The strands of each of the conductive members are adjacent in contact with each other, and each two adjacent strands have a first electrical resistivity in the adjacent direction, and each of the strands is It has a second electrical resistivity in the length direction, and the first electrical resistivity is greater than the second electrical resistivity.
  • Patent Document 2 discloses a technology relating to a slotless type rotary electric machine in which a salient pole is not formed. According to this, the cogging torque resulting from the salient pole can be prevented.
  • a main object of the fourteenth disclosure is to provide a rotating electrical machine with improved torque.
  • the fourteenth disclosure by adopting an armature winding in which the first dimension is smaller than the second dimension, as compared to the case where an armature winding in which the first dimension is greater than the second dimension is employed. , The magnetic resistance between the stator and the rotor is reduced. At the same time, the area of the conductive member of the armature winding to receive the magnetic flux can be increased. Therefore, even if the surface magnetic flux density of the magnet unit is increased by adopting the above-mentioned magnet unit, it is possible to suppress the flux leakage by increasing the amount of magnetic flux linked to the conductive member.
  • each of the conductive members is composed of a plurality of bundled strands, and the respective strands of the conductive members are adjacent to each other in a contact state.
  • Each two adjacent strands have a first electrical resistivity in their adjacent direction, each of the strands has a second electrical resistivity in their length direction, and the first electrical resistivity is the second electrical resistivity. Greater than resistivity. As a result, generation of eddy current can be further suppressed in the conductive member.
  • the fifteenth disclosure is A magnetic field generation unit having a cylindrical magnet unit provided with a plurality of magnetic poles having an N pole and an S pole, wherein the N pole and the S pole are alternately arranged in the circumferential direction; An armature having a polyphase armature winding; And a rotor comprising any of the magnetic field generation unit and the armature,
  • the magnetic field generation unit has an intrinsic coercivity of 400 kA / m and a residual magnetic flux density of 1.0 T or more
  • the armature winding has a plurality of conductive members opposed to the magnetic field generation unit, and arranged at predetermined intervals in the circumferential direction of the armature, Each of the armature windings has a plurality of inter-lead members disposed between adjacent ones of the conductive members of the armature winding, and magnetically functions with one of the magnetic poles of the magnet unit of the armature winding.
  • the inter-conductor member is Wt ⁇ Bs ⁇ Wm ⁇ Br
  • the conductive members are arranged at predetermined intervals in the circumferential direction of the armature, and a nonmagnetic material is disposed between adjacent conductive members, and the nonmagnetic material occupies all the predetermined intervals.
  • Each of the conductive members comprises a plurality of bundled strands;
  • the strands of each of the conductive members are adjacent in contact with each other, and each two adjacent strands have a first electrical resistivity in the adjacent direction, and each of the strands is It has a second electrical resistivity in the length direction, and the first electrical resistivity is greater than the second electrical resistivity.
  • Patent Document 2 discloses a technology relating to a slotless type rotary electric machine in which a salient pole is not formed. According to this, the cogging torque resulting from the salient pole can be prevented.
  • a main object of the fifteenth disclosure is to provide a rotating electrical machine with improved torque.
  • the surface magnetic flux density of the magnet unit can be improved by using the magnet unit having the above configuration. Further, by making the armature in the above-mentioned configuration, even if the surface magnetic flux density of the magnet unit is improved, the magnetic saturation on the armature side is suppressed, so that the occurrence of magnetic flux leakage can be suppressed. Therefore, the amount of magnetic flux interlinked with the conductive member of the armature winding can be increased.
  • each of the conductive members comprises a plurality of bundled strands, and the respective strands of the conductive members are adjacent to each other in a contact state.
  • Each two adjacent strands have a first electrical resistivity in their adjacent direction
  • each of the strands has a second electrical resistivity in their length direction
  • the first electrical resistivity is the second electrical resistivity. Greater than resistivity.
  • the sixteenth disclosure is A magnetic field generation unit having a cylindrical magnet unit provided with a plurality of magnetic poles having an N pole and an S pole, wherein the N pole and the S pole are alternately arranged in the circumferential direction;
  • An armature having a polyphase armature winding;
  • a rotor comprising any of the magnetic field generation unit and the armature,
  • the armature winding has a plurality of conductive members opposed to the magnetic field generation unit, and arranged at predetermined intervals in the circumferential direction of the armature,
  • the armature winding is formed to have a predetermined first dimension and a second dimension, and the first dimension is a distance between the outer surface and the inner surface facing each other in the radial direction of the armature.
  • the second dimension is a circumferential length of the armature of a portion of the armature winding functioning as one in the polyphase of the armature, and the first dimension is the second dimension Smaller than
  • Each of the armature windings has a plurality of inter-lead members disposed between adjacent ones of the conductive members of the armature winding, and magnetically functions with one of the magnetic poles of the magnet unit of the armature winding.
  • the inter-conductor member is Wt ⁇ Bs ⁇ Wm ⁇ Br
  • the conductive members are arranged at predetermined intervals in the circumferential direction of the armature, and a nonmagnetic material is disposed between adjacent conductive members, and the nonmagnetic material occupies all the predetermined intervals.
  • Each of the conductive members comprises a plurality of bundled strands;
  • the strands of each of the conductive members are adjacent in contact with each other, and each two adjacent strands have a first electrical resistivity in the adjacent direction, and each of the strands is It has a second electrical resistivity in the length direction, and the first electrical resistivity is greater than the second electrical resistivity.
  • Patent Document 2 discloses a technology relating to a slotless type rotary electric machine in which a salient pole is not formed. According to this, the cogging torque resulting from the salient pole can be prevented.
  • a main object of the sixteenth disclosure is to provide a rotating electrical machine with improved efficiency.
  • the stator and the stator coil are compared with the case where an armature winding in which the first dimension is larger than the second dimension is employed.
  • the magnetic reluctance with the rotor is reduced.
  • the area of the conductive member of the armature winding to receive the magnetic flux can be increased. That is, the magnetic flux leakage can be suppressed, and the amount of magnetic flux linked to the conductive member can be increased.
  • each of the conductive members is composed of a plurality of bundled strands, and the respective strands of the conductive members are adjacent to each other in a contact state.
  • Each two adjacent strands have a first electrical resistivity in their adjacent direction, each of the strands has a second electrical resistivity in their length direction, and the first electrical resistivity is the second electrical resistivity. Greater than resistivity. As a result, generation of eddy current can be further suppressed in the conductive member.
  • FIG. 1 is a longitudinal sectional perspective view of a rotating electric machine
  • Fig. 2 is a longitudinal sectional view of the rotating electric machine
  • 3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view showing a part of FIG. 3 in an enlarged manner
  • Fig. 5 is an exploded view of the rotating electrical machine
  • FIG. 6 is an exploded view of the inverter unit
  • FIG. 7 is a torque diagram showing the relationship between the ampere turns of the stator winding and the torque density
  • FIG. 8 is a cross-sectional view of a rotor and a stator, FIG. 9 is an enlarged view of a part of FIG. 8;
  • FIG. 10 is a cross-sectional view of the stator;
  • FIG. 11 is a longitudinal sectional view of a stator,
  • FIG. 12 is a perspective view of a stator winding;
  • FIG. 13 is a perspective view showing the configuration of a lead;
  • FIG. 14 is a schematic view showing the structure of a wire;
  • FIG. 15 is a diagram showing the form of each wire in the n-th layer,
  • FIG. 16 is a side view showing the conductors in the n-th layer and the n + 1-th layer;
  • FIG. 17 is a diagram showing the relationship between the electrical angle and the magnetic flux density for the magnet of the embodiment
  • FIG. 18 is a diagram showing the relationship between the electrical angle and the magnetic flux density for the magnet of the comparative example
  • FIG. 19 is an electric circuit diagram of a control system of a rotating electric machine
  • FIG. 20 is a functional block diagram showing current feedback control processing by the controller
  • FIG. 21 is a functional block diagram showing a torque feedback control process by the controller
  • FIG. 22 is a cross-sectional view of the rotor and the stator in the second embodiment
  • FIG. 23 is an enlarged view of a part of FIG.
  • FIG. 24 is a diagram specifically showing the flow of magnetic flux in the magnet unit
  • FIG. 25 is a cross-sectional view of the stator in the first modification
  • FIG. 26 is a cross-sectional view of a stator in the first modification
  • FIG. 27 is a cross-sectional view of a stator in the second modification
  • FIG. 28 is a cross-sectional view of a stator in the third modification
  • FIG. 29 is a cross-sectional view of a stator in the fourth modification
  • FIG. 30 is a transverse sectional view of a rotor and a stator according to a seventh modification
  • FIG. 31 is a functional block diagram showing a part of processing of the operation signal generation unit in the eighth modification
  • FIG. 32 is a flowchart showing a procedure of carrier frequency change processing
  • FIG. 33 is a diagram showing a connection form of the respective conductive wires constituting the conductive wire group in the ninth modification
  • FIG. 33 is a diagram showing a connection form of the respective conductive wires constituting the conductive wire group in the ninth modification
  • FIG. 33 is a diagram showing a connection form of the respective conductive wires constituting the conductive wire
  • FIG. 34 is a diagram showing a configuration in which four pairs of conducting wires are stacked and arranged in the ninth modification;
  • FIG. 35 is a cross-sectional view of an inner rotor type rotor and a stator in the tenth modification;
  • 36 is a diagram showing a part of FIG. 35 in an enlarged manner,
  • Fig. 37 is a longitudinal sectional view of an inner rotor type rotating electric machine,
  • FIG. 38 is a longitudinal sectional view showing a schematic configuration of an inner rotor type rotating electric machine,
  • FIG. 39 is a diagram showing the configuration of a rotary electric machine with an inner rotor structure in Modification 11;
  • FIG. 40 is a diagram showing the configuration of a rotary electric machine with an inner rotor structure in Modification 11;
  • FIG. 40 is a diagram showing the configuration of a rotary electric machine with an inner rotor structure in Modification 11;
  • FIG. 40 is a diagram showing the configuration of a rotary electric machine with an inner
  • FIG. 41 is a diagram showing the configuration of a rotary armature type rotary electric machine according to a modification 12;
  • FIG. 42 is a cross-sectional view showing the configuration of the lead in modification 14;
  • FIG. 43 is a diagram showing the relationship between the relaxation torque, the magnet torque and the DM,
  • FIG. 44 is a diagram showing teeth.
  • the rotating electrical machine in the present embodiment is, for example, used as a vehicle power source.
  • the rotary electric machine can be widely used for industrial use, for vehicles, for home appliances, for OA equipment, for game machines, and the like.
  • symbol is attached
  • the rotary electric machine 10 is a synchronous multiphase AC motor, and has an outer rotor structure (eversion structure).
  • summary of the rotary electric machine 10 is shown in FIG. 1 thru
  • or FIG. 1 is a longitudinal sectional perspective view of the rotating electrical machine 10
  • FIG. 2 is a longitudinal sectional view in the direction along the rotating shaft 11 of the rotating electrical machine 10
  • FIG. 3 is a direction perpendicular to the rotating shaft 11.
  • FIG. 4 is a cross-sectional view of the rotary electric machine 10 (a cross-sectional view taken along the line III-III in FIG. 2), FIG. 4 is a cross-sectional view showing a part of FIG. It is.
  • FIG. 1 is a longitudinal sectional perspective view of the rotating electrical machine 10
  • FIG. 2 is a longitudinal sectional view in the direction along the rotating shaft 11 of the rotating electrical machine 10
  • FIG. 3 is a direction perpendicular to the rotating shaft 11.
  • FIG. 4 is a cross-sectional view of the rotary electric
  • the rotary electric machine 10 roughly includes a bearing unit 20, a housing 30, a rotor 40, a stator 50, and an inverter unit 60. Each of these members is disposed coaxially with the rotation shaft 11, and is assembled in an axial direction in a predetermined order, whereby the rotary electric machine 10 is configured.
  • the rotary electric machine 10 of the present embodiment is configured to have a rotor 40 as a "magnetic field generation unit, field element" and a stator 50 as an "armature”, and a rotary electric field type rotary electric machine It has been embodied as
  • the bearing unit 20 has two bearings 21 and 22 which are disposed to be separated from each other in the axial direction, and a holding member 23 for holding the bearings 21 and 22.
  • the bearings 21 and 22 are, for example, radial ball bearings, and each include an outer ring 25, an inner ring 26, and a plurality of balls 27 disposed between the outer ring 25 and the inner ring 26.
  • the holding member 23 has a cylindrical shape, and the bearings 21 and 22 are assembled on the inner side in the radial direction.
  • the rotary shaft 11 and the rotor 40 are rotatably supported on the inner side in the radial direction of the bearings 21 and 22.
  • the bearings 21 and 22 constitute a set of bearings that rotatably support the rotating shaft 11.
  • the balls 27 are held by a retainer (not shown), and the pitch between the balls is maintained in this state.
  • the bearings 21 and 22 have sealing members at the upper and lower portions in the axial direction of the retainer, and the inside thereof is filled with non-conductive grease (for example, non-conductive urea-based grease). Further, the position of the inner ring 26 is mechanically held by the spacer, and a constant pressure preload that is convex in the vertical direction from the inside is applied.
  • the housing 30 has a cylindrical peripheral wall 31.
  • the peripheral wall 31 has a first end and a second end opposite in the axial direction.
  • the peripheral wall 31 has an end face 32 at a first end and an opening 33 at a second end.
  • the opening 33 is open at the entire second end.
  • a circular hole 34 is formed in the center of the end face 32, and the bearing unit 20 is fixed by a fixing tool such as a screw or a rivet in a state of being inserted into the hole 34.
  • a hollow cylindrical rotor 40 and a hollow cylindrical stator 50 are accommodated in the housing 30, that is, in an internal space defined by the peripheral wall 31 and the end surface 32.
  • the rotary electric machine 10 is of the outer rotor type, and the stator 50 is disposed inside the housing 30 in the radial direction of the cylindrical rotor 40.
  • the rotor 40 is cantilevered on the rotary shaft 11 on the side of the end face 32 in the axial direction.
  • the rotor 40 has a magnet holder 41 formed in a hollow cylindrical shape, and an annular magnet unit 42 provided radially inward of the magnet holder 41.
  • the magnet holder 41 has a substantially cup shape and has a function as a magnet holding member.
  • the magnet holder 41 is a cylindrical portion 43 having a cylindrical shape, and an intermediate portion serving as a portion connecting the cylindrical portion 43 and the fixing portion 44, which has the same cylindrical shape and has an attachment 44 smaller in diameter than the cylindrical portion 43. And 45.
  • the magnet unit 42 is attached to the inner peripheral surface of the cylindrical portion 43.
  • the magnet holder 41 is made of cold rolled steel plate (SPCC) having sufficient mechanical strength, steel for forging, carbon fiber reinforced plastic (CFRP) or the like.
  • SPCC cold rolled steel plate
  • CFRP carbon fiber reinforced plastic
  • the rotating shaft 11 is inserted into the through hole 44 a of the fixed portion 44.
  • the fixing portion 44 is fixed to the rotating shaft 11 disposed in the through hole 44 a. That is, the magnet holder 41 is fixed to the rotating shaft 11 by the fixing portion 44.
  • the fixing portion 44 may be fixed to the rotating shaft 11 by spline connection using an unevenness, key connection, welding, caulking, or the like.
  • the rotor 40 rotates integrally with the rotating shaft 11.
  • the bearings 21 and 22 of the bearing unit 20 are assembled on the radial outside of the fixing portion 44.
  • the bearing unit 20 is fixed to the end surface 32 of the housing 30, the rotary shaft 11 and the rotor 40 are rotatably supported by the housing 30. Thereby, the rotor 40 is rotatable in the housing 30.
  • the rotor 40 is provided with a fixing portion 44 only at one of two axially opposite ends thereof, whereby the rotor 40 is supported in a cantilever manner on the rotation shaft 11.
  • the fixed portion 44 of the rotor 40 is rotatably supported by the bearings 21 and 22 of the bearing unit 20 at two different positions in the axial direction. That is, the rotor 40 is rotatably supported by two axially spaced bearings 21 and 22 at one of two axially opposite ends of the magnet holder 41. Therefore, stable rotation of the rotor 40 is realized even if the rotor 40 is supported by the rotary shaft 11 in a cantilever manner. In this case, the rotor 40 is supported by the bearings 21 and 22 at a position shifted to one side with respect to the axial center position of the rotor 40.
  • the bearing 22 near the center of the rotor 40 (lower side in the figure) and the bearing 21 on the opposite side (upper side in the figure)
  • the dimensions are different.
  • the bearing 22 near the center of the rotor 40 has a larger gap size than the bearing 21 on the opposite side.
  • Ru Specifically, by increasing the play size (gap size) by preloading in the bearing 22 near the center of the rotor 40 (the lower side in the figure), the vibration generated in the cantilever structure is absorbed by the play portion. Ru.
  • the preload may be either fixed position preload or constant pressure preload.
  • the bearing 21 and the outer ring 25 of the bearing 22 are both joined to the holding member 23 using a method such as press fitting or adhesion.
  • the bearing 21 and the inner ring 26 of the bearing 22 are both joined to the rotary shaft 11 using a method such as press fitting or bonding.
  • the preload can also be generated by arranging the outer ring 25 of the bearing 22 at a position different from the inner ring 26 of the bearing 22 in the axial direction.
  • a preload spring for example, a wave washer 24 or the like, is bearing so that a preload is generated from the region between the bearing 22 and the bearing 21 toward the outer ring 25 of the bearing 22 in the axial direction. It arrange
  • the bearing 21 and the inner ring 26 of the bearing 22 are both joined to the rotating shaft 11 using a method such as press fitting or bonding.
  • the bearing 21 or the outer ring 25 of the bearing 22 is disposed with respect to the holding member 23 via a predetermined clearance. With such a configuration, the spring force of the preload spring acts on the outer ring 25 of the bearing 22 in the direction away from the bearing 21.
  • a spring force may be applied to the outer ring 25 of the bearing 21.
  • the inner ring 26 of any one of the bearings 21 and 22 is disposed with a predetermined clearance with respect to the rotary shaft 11, and the outer rings 25 of the bearings 21 and 22 are press-fit or adhered to the holding member 23
  • the two bearings may be preloaded by joining them together.
  • the inner ring 26 of the bearing 21 exerts a force on the bearing 22 to be separated, it is better to exert the force on the bearing 21 so as to separate the bearing 21 as well. Conversely, in the case where the inner ring 26 of the bearing 21 exerts a force to approach the bearing 22, it is better to apply the force so that the inner ring 26 of the bearing 22 also approaches the bearing 21.
  • the mechanism for generating the preload may be subjected to vibration having a component in the direction of generation of the preload, or an object to which the preload is applied. There is a possibility that the direction of gravity on an object may change. Therefore, when applying this rotary electric machine 10 to a vehicle, it is desirable to adopt a fixed position preload.
  • the middle portion 45 also has an annular inner shoulder 49a and an annular outer shoulder 49b.
  • the outer shoulder 49 b is located outside the inner shoulder 49 a in the radial direction of the middle portion 45.
  • the inner shoulder 49 a and the outer shoulder 49 b are spaced apart from each other in the axial direction of the middle portion 45.
  • the cylindrical portion 43 and the fixing portion 44 partially overlap in the radial direction of the intermediate portion 45. That is, the cylindrical portion 43 protrudes axially outward with respect to the proximal end (the lower end in the drawing) of the fixed portion 44.
  • the bearing accommodation concave portion 46 which accommodates a part of the bearing unit 20 at a position surrounding the fixing portion 44 in the radial direction and inward of the intermediate portion 45.
  • a coil accommodating recess for accommodating a coil end 54 of a stator winding 51 of the stator 50 described later at a position surrounding the bearing accommodating recess 46 in the radial direction and being on the outer side of the intermediate portion 45 47 are formed.
  • these each accommodation recessed part 46, 47 is arrange
  • the intermediate portion 45 is provided so as to project radially outward from the rotary shaft 11 side.
  • the intermediate portion 45 is provided with a contact avoiding portion which extends in the axial direction and prevents the contact of the stator winding 51 of the stator 50 with the coil end 54.
  • the middle portion 45 corresponds to the overhang portion.
  • the coil end 54 can be bent radially inward or outward so that the axial dimension of the coil end 54 can be reduced, and the axial length of the stator 50 can be shortened.
  • the bending direction of the coil end 54 may be in consideration of the assembly with the rotor 40. Assuming that the stator 50 is assembled radially inward of the rotor 40, it is preferable that the coil end 54 be bent radially inward on the insertion tip side with respect to the rotor 40. Although the bending direction of the coil end on the opposite side of the coil end 54 may be arbitrary, an outwardly bent shape having a space is preferable in terms of manufacture.
  • the magnet unit 42 as a magnet part is comprised by the some permanent magnet arrange
  • the magnet unit 42 has a plurality of magnetic poles in the circumferential direction.
  • the details of the magnet unit 42 will be described later.
  • the stator 50 is provided radially inward of the rotor 40.
  • the stator 50 has a stator winding 51 wound in a substantially cylindrical shape (annular shape) and a stator core 52 as a base member disposed radially inward, and the stator winding A line 51 is disposed to face the annular magnet unit 42 across a predetermined air gap.
  • the stator winding 51 is composed of a plurality of phase windings. Each of the phase windings is configured by connecting a plurality of conductive wires arranged in the circumferential direction to each other at a predetermined pitch.
  • the stator winding 51 is configured as a six-phase phase winding.
  • the stator core 52 is formed in an annular shape by a laminated steel plate in which electromagnetic steel sheets, which are soft magnetic materials, are laminated, and is assembled inside the stator winding 51 in the radial direction.
  • the electromagnetic steel sheet is, for example, a silicon steel sheet obtained by adding about several percent (for example, 3%) of silicon to iron.
  • the stator winding 51 corresponds to an armature winding
  • the stator core 52 corresponds to an armature core.
  • the stator winding 51 is a portion overlapping the stator core 52 in the radial direction, and a coil side portion 53 that is radially outward of the stator core 52, and one end side of the stator core 52 in the axial direction and the other.
  • the coil ends 54 and 55 respectively project on the end side.
  • the coil side portion 53 respectively faces the stator core 52 and the magnet unit 42 of the rotor 40 in the radial direction.
  • the coil end 54 which becomes the side of the bearing unit 20 (the upper side in the figure), of the coil ends 54 and 55 on both axial sides is the magnet holder of the rotor 40 It is accommodated in the coil accommodation recessed part 47 formed of 41.
  • the details of the stator 50 will be described later.
  • the inverter unit 60 has a unit base 61 fixed to the housing 30 by a fastener such as a bolt, and a plurality of electrical components 62 assembled to the unit base 61.
  • the unit base 61 is made of, for example, a carbon fiber reinforced plastic (CFRP).
  • CFRP carbon fiber reinforced plastic
  • the unit base 61 has an end plate 63 fixed to the edge of the opening 33 of the housing 30, and an axially extending casing 64 integrally provided on the end plate 63.
  • the end plate 63 has a circular opening 65 at its central portion, and a casing 64 is formed so as to stand up from the peripheral edge of the opening 65.
  • the stator 50 is assembled to the outer peripheral surface of the casing 64. That is, the outer diameter dimension of the casing 64 is the same as the inner diameter dimension of the stator core 52 or slightly smaller than the inner diameter dimension of the stator core 52.
  • the stator core 52 is assembled to the outside of the casing 64, whereby the stator 50 and the unit base 61 are integrated. Further, when the unit base 61 is fixed to the housing 30, the stator 50 is integrated with the housing 30 in a state where the stator core 52 is assembled to the casing 64.
  • the stator core 52 may be assembled to the unit base 61 by bonding, shrink fitting, press fitting, or the like. Thus, positional deviation of the stator core 52 in the circumferential direction or axial direction with respect to the unit base 61 side is suppressed.
  • a radial inner side of the casing 64 is a housing space for housing the electric component 62, and the electric component 62 is disposed in the housing space so as to surround the rotary shaft 11.
  • the casing 64 has a role as a housing space forming part.
  • the electric component 62 is configured to include a semiconductor module 66 constituting an inverter circuit, a control board 67, and a capacitor module 68.
  • the unit base 61 is provided on the inner side in the radial direction of the stator 50 and corresponds to a stator holder (armature holder) for holding the stator 50.
  • the housing 30 and the unit base 61 constitute a motor housing of the rotary electric machine 10.
  • the holding member 23 is fixed to the housing 30 on one side of the rotor 40 in the axial direction, and the housing 30 and the unit base 61 are connected to each other on the other side.
  • the rotating electrical machine 10 is mounted on a vehicle or the like by attaching a motor housing to the side of the vehicle or the like.
  • FIG. 6 is an exploded view of the inverter unit 60 in addition to FIGS. 1 to 5 described above.
  • the casing 64 has a cylindrical portion 71 and an end face 72 provided on one of the opposite ends (the end on the bearing unit 20 side) opposed in the axial direction.
  • the side opposite to the end face 72 is entirely open through the opening 65 of the end plate 63.
  • a circular hole 73 is formed at the center of the end face 72, and the rotary shaft 11 can be inserted through the hole 73.
  • the hole 73 is provided with a sealing material 171 for closing a gap between the hole 73 and the outer peripheral surface of the rotating shaft 11.
  • the sealing material 171 may be, for example, a sliding seal made of a resin material.
  • the cylindrical portion 71 of the casing 64 serves as a partition that divides between the rotor 40 and the stator 50 disposed radially outward and the electric component 62 disposed radially inward.
  • the rotor 40, the stator 50, and the electric component 62 are respectively arranged side by side radially inward and outward with the portion 71 interposed therebetween.
  • the electric component 62 is an electric component constituting an inverter circuit, and has a power running function of rotating the rotor 40 by supplying current to each phase winding of the stator winding 51 in a predetermined order;
  • the generator has a power generation function of inputting a three-phase alternating current flowing in the stator winding 51 with the rotation of the motor and outputting the generated electric power as the generated power.
  • the electrical component 62 may have only one of the power running function and the power generation function.
  • the power generation function is, for example, a regeneration function that outputs the regenerative electric power to the outside when the rotating electrical machine 10 is used as a vehicle power source.
  • a hollow cylindrical capacitor module 68 is provided around the rotation shaft 11, and a plurality of capacitor modules 68 are provided on the outer peripheral surface of the capacitor module 68.
  • the semiconductor modules 66 are arranged in the circumferential direction.
  • the capacitor module 68 includes a plurality of smoothing capacitors 68 a connected in parallel with one another.
  • the capacitor 68a is a laminated film capacitor in which a plurality of film capacitors are stacked, and the cross section has a trapezoidal shape.
  • the capacitor module 68 is configured by arranging twelve capacitors 68 a in a ring shape.
  • the capacitor 68a for example, a long film of a predetermined width formed by laminating a plurality of films is used, the film width direction is a trapezoidal height direction, and the upper and lower bases of the trapezoid alternate.
  • the capacitor film is produced by cutting the long film into an isosceles trapezoidal shape. Then, by attaching an electrode or the like to the capacitor element, the capacitor 68a is manufactured.
  • the semiconductor module 66 includes semiconductor switching elements such as MOSFETs and IGBTs, for example, and is formed in a substantially plate shape.
  • semiconductor switching elements such as MOSFETs and IGBTs, for example, and is formed in a substantially plate shape.
  • an inverter circuit is provided for each of the three-phase windings, a total of 12 semiconductor modules 66 are formed in a ring.
  • the semiconductor module group 66 ⁇ / b> A is provided to the electrical component 62.
  • the semiconductor module 66 is disposed between the cylindrical portion 71 of the casing 64 and the capacitor module 68.
  • the outer peripheral surface of the semiconductor module group 66A is in contact with the inner peripheral surface of the cylindrical portion 71, and the inner peripheral surface of the semiconductor module group 66A is in contact with the outer peripheral surface of the capacitor module 68.
  • the heat generated in the semiconductor module 66 is transferred to the end plate 63 through the casing 64 and is released from the end plate 63.
  • the semiconductor module group 66A preferably has a spacer 69 between the semiconductor module 66 and the cylindrical portion 71 on the outer peripheral surface side, that is, in the radial direction.
  • the cross-sectional shape of the cross section orthogonal to the axial direction is a regular dodecagon
  • the cross-sectional shape of the inner peripheral surface of the cylindrical portion 71 is circular. Is a flat surface
  • the outer peripheral surface is a curved surface.
  • the spacers 69 may be integrally provided so as to be continuous in an annular shape on the radially outer side of the semiconductor module group 66A.
  • the spacer 69 is a good heat conductor, and may be, for example, a metal such as aluminum or a heat dissipating gel sheet.
  • a metal such as aluminum or a heat dissipating gel sheet.
  • the cooling water passage 74 for circulating the cooling water is formed in the cylindrical portion 71 of the casing 64, and the heat generated by the semiconductor module 66 is to the cooling water flowing through the cooling water passage 74. It is also released. That is, the casing 64 is provided with a water cooling mechanism. As shown in FIGS. 3 and 4, the cooling water passage 74 is annularly formed so as to surround the electric component 62 (the semiconductor module 66 and the capacitor module 68). The semiconductor module 66 is disposed along the inner peripheral surface of the cylindrical portion 71, and the cooling water passage 74 is provided at a position overlapping the semiconductor module 66 in the radial direction and the inside.
  • stator 50 Since the stator 50 is disposed outside the cylindrical portion 71 and the electric component 62 is disposed inside, the heat of the stator 50 is transmitted to the cylindrical portion 71 from the outside thereof, The heat of the electrical component 62 (for example, the heat of the semiconductor module 66) is transmitted from the inside. In this case, the stator 50 and the semiconductor module 66 can be cooled simultaneously, and the heat of the heat generating member of the rotary electric machine 10 can be efficiently released.
  • the semiconductor module 66 that constitutes a part or all of the inverter circuit that operates the rotating electrical machine by energizing the stator winding 51 is the radial outside of the cylindrical portion 71 of the casing 64
  • the stator core 52 is disposed in the area surrounded by the stator core 52.
  • the whole of one semiconductor module 66 is disposed in the area surrounded by the stator core 52.
  • all of the semiconductor modules 66 are disposed in the area surrounded by the stator core 52.
  • the semiconductor module 66 is disposed in the area surrounded by the cooling water passage 74. Desirably, the whole of all the semiconductor modules 66 is disposed in the area surrounded by the yoke 141.
  • the electrical component 62 also includes an insulating sheet 75 provided on one end surface of the capacitor module 68 in the axial direction and a wiring module 76 provided on the other end surface.
  • the capacitor module 68 has two end faces opposed in the axial direction, that is, a first end face and a second end face. A first end face close to the bearing unit 20 of the capacitor module 68 is opposed to the end face 72 of the casing 64, and is superimposed on the end face 72 with the insulating sheet 75 interposed therebetween. Further, the wiring module 76 is assembled to the second end face close to the opening 65 of the capacitor module 68.
  • the wiring module 76 has a circular plate-like main body 76a made of a synthetic resin material and a plurality of bus bars 76b and 76c embedded therein.
  • the bus bars 76b and 76c allow the semiconductor module 66 and the capacitor to be formed.
  • An electrical connection is made with the module 68.
  • the semiconductor module 66 has a connection pin 66a extending from the end face in the axial direction, and the connection pin 66a is connected to the bus bar 76b at the radial outside of the main body 76a.
  • the bus bar 76c extends to the side opposite to the capacitor module 68 at the radially outer side of the main body 76a, and is connected to the wiring member 79 at its tip (see FIG. 2).
  • the heat radiation path of the capacitor module 68 A path from the first end face and the second end face of the capacitor module 68 to the end face 72 and the cylindrical portion 71 is formed. That is, a path from the first end face to the end face 72 and a path from the second end face to the cylindrical portion 71 are formed.
  • heat can be dissipated from the end surface portion of the capacitor module 68 other than the outer peripheral surface on which the semiconductor module 66 is provided. That is, not only the radiation in the radial direction but also the radiation in the axial direction is possible.
  • the capacitor module 68 has a hollow cylindrical shape and the rotary shaft 11 is disposed with a predetermined gap interposed in the inner peripheral portion, the heat of the capacitor module 68 can be released also from the hollow portion ing. In this case, the flow of air is generated by the rotation of the rotating shaft 11, so that the cooling effect is enhanced.
  • a disk-shaped control board 67 is attached to the wiring module 76.
  • the control board 67 has a printed circuit board (PCB) on which a predetermined wiring pattern is formed, and on the board is mounted a control device 77 corresponding to a control unit including various ICs and a microcomputer. There is.
  • the control board 67 is fixed to the wiring module 76 by a fixing tool such as a screw.
  • the control board 67 has an insertion hole 67a at its central portion for inserting the rotating shaft 11.
  • the wiring module 76 has a first surface and a second surface facing each other in the axial direction, that is, facing each other in the thickness direction.
  • the first side faces the capacitor module 68.
  • the wiring module 76 is provided with a control board 67 on its second surface.
  • the bus bars 76c of the wiring module 76 extend from one side of the both sides of the control board 67 to the other side.
  • the control board 67 be provided with a notch for avoiding interference with the bus bar 76c.
  • a part of the outer edge portion of the circular control board 67 be cut away.
  • the inverter circuit is generated.
  • the electromagnetic noise is preferably shielded. That is, in the inverter circuit, switching control in each semiconductor module 66 is performed using PWM control with a predetermined carrier frequency, and it is conceivable that electromagnetic noise may be generated due to the switching control. It can shield suitably by the housing 30, the rotor 40, the stator 50 grade
  • the semiconductor module 66 is disposed in a region surrounded by the stator core 52 disposed radially outward of the cylindrical portion 71 of the casing 64, thereby the semiconductor module 66 and the stator winding Compared with the configuration in which the stator core 51 is disposed without the stator core 52, even if magnetic flux is generated from the semiconductor module 66, the stator winding 51 is less likely to be affected. Further, even if magnetic flux is generated from the stator winding 51, the semiconductor module 66 is unlikely to be affected. It is more effective to dispose the whole of the semiconductor module 66 in a region surrounded by the stator core 52 disposed radially outside of the cylindrical portion 71 of the casing 64. In addition, when at least a part of the semiconductor module 66 is surrounded by the cooling water passage 74, an effect can be obtained that heat generated from the stator winding 51 and the magnet unit 42 does not easily reach the semiconductor module 66.
  • a through hole 78 for inserting a wiring member 79 for electrically connecting the stator 50 on the outside and the electric component 62 on the inside is formed.
  • the wiring member 79 is connected to the end of the stator winding 51 and the bus bar 76 c of the wiring module 76 by pressure bonding, welding or the like.
  • the wiring member 79 is, for example, a bus bar, and it is desirable that the joint surface is crushed flat.
  • the through holes 78 may be provided at one or a plurality of places, and in the present embodiment, the through holes 78 are provided at two places. In the configuration in which through holes 78 are provided at two locations, it is possible to easily connect the winding terminals extending from two sets of three-phase windings with wiring member 79, which is preferable for performing multiphase connection. It has become.
  • the rotor 40 and the stator 50 are provided in order from the radial outer side, and the inverter unit 60 is provided in the radial direction inner side of the stator 50.
  • the rotor 40 and the stator 50 are disposed radially outside the distance of d ⁇ 0.705 from the rotation center of the rotor 40 There is.
  • the region radially inward from the inner circumferential surface of the radially inner stator 50 (that is, the inner circumferential surface of the stator core 52) is the first region X1 in the radial direction
  • the area from the inner circumferential surface of the stator 50 to the housing 30 is a second area X2
  • the area of the cross section of the first area X1 is larger than the area of the cross section of the second area X2.
  • the magnet unit 42 of the rotor 40 and the stator winding 51 of the rotor 40 overlap in the radial direction, the volume of the first region X1 is larger than the volume of the second region X2.
  • the first region X1 radially inward from the inner circumferential surface of the magnetic circuit component assembly in the radial direction is the magnetic circuit component assembly
  • the volume is larger than the second region X2 from the inner circumferential surface of the housing 30 to the housing 30.
  • stator in a rotating electrical machine, it is known to provide a plurality of slots in a circumferential direction on a stator core made of laminated steel plates and having an annular shape, and winding a stator winding in the slots.
  • the stator core has a plurality of teeth radially extending at predetermined intervals from the yoke, and a slot is formed between the teeth adjacent in the circumferential direction.
  • the slot for example, a plurality of layers of conducting wires are accommodated in the radial direction, and the stator winding is configured by the conducting wires.
  • stator winding when the stator winding is energized, magnetic saturation occurs in the teeth of the stator core as the magnetomotive force of the stator winding increases, which causes rotation of the rotating electric machine. It is conceivable that the torque density is limited. That is, in the stator core, it is considered that magnetic saturation occurs when the rotating magnetic flux generated by energization of the stator winding is concentrated on the teeth.
  • IPM Interior Permanent Magnet
  • FIG. 7 is a torque diagram showing a relationship between an ampere turn [AT] indicating a magnetomotive force of a stator winding and a torque density [Nm / L].
  • the broken line shows the characteristics of a general IPM rotor type rotating electric machine.
  • FIG. 7 in a general rotating electric machine, magnetic saturation occurs in two places of the teeth portion between the slots and the q-axis core portion by increasing the magnetomotive force in the stator, which causes The increase in torque is limited.
  • the ampere-turn design value is limited to A1.
  • the structure shown below shall be provided. That is, as a first device, in order to eliminate magnetic saturation occurring in the stator core teeth in the stator, a slotless structure is adopted in the stator 50 and magnetic saturation occurring in the q-axis core portion of the IPM rotor is eliminated. , SPM (Surface Permanent Magnet) rotor is adopted. According to the first device, it is possible to eliminate the two parts where the magnetic saturation occurs, but it is conceivable that the torque in the low current region is reduced (see the dashed line in FIG. 7).
  • a pole anisotropic structure is adopted in which the magnet magnetic path is lengthened in the magnet unit 42 of the rotor 40 to increase the magnetic force in order to overcome the torque reduction by increasing the magnetic flux of the SPM rotor. ing.
  • a flat wire structure in which the radial thickness of the wire in the stator 50 is reduced at the coil side portion 53 of the stator winding 51 is employed to achieve the reduction of torque.
  • a larger eddy current is generated in the stator winding 51 facing the magnet unit 42 due to the above-described pole anisotropic structure in which the magnetic force is enhanced.
  • the third device it is possible to suppress the generation of the eddy current in the radial direction in the stator winding 51 because of the flat thin lead wire structure in the radial direction.
  • a magnet having a high magnetic force is employed to expect a significant improvement in torque characteristics, while a magnet having a high magnetic force is expected.
  • the potential for large eddy current generation can also be ameliorated.
  • a magnet unit having a magnetic flux density distribution close to a sine wave is adopted by utilizing a pole anisotropic structure. According to this, it is possible to enhance the torque by increasing the sine wave matching rate by pulse control and the like described later, and also to reduce eddy current loss (copper loss due to eddy current: eddy current loss) Can also be further suppressed.
  • the sine wave matching factor will be described below.
  • the sine wave matching rate can be obtained by comparing the measured waveform of the surface magnetic flux density distribution measured by tracing the surface of the magnet with a magnetic flux probe and the like and the sine wave having the same period and peak value.
  • the ratio of the amplitude of the primary waveform, which is the fundamental wave of the rotary electric machine, to the amplitude of the measured waveform, that is, the amplitude obtained by adding another harmonic component to the fundamental wave corresponds to the sine wave matching ratio.
  • the sine wave matching rate increases, the waveform of the surface magnetic flux density distribution approaches a sine wave shape.
  • the surface magnetic flux density distribution may be estimated by a method other than measurement, for example, electromagnetic field analysis using Maxwell's equation.
  • the stator winding 51 has a strand conductor structure in which a plurality of strands are gathered and bundled. According to this, since the strands are connected in parallel, a large current can flow, and generation of eddy current generated in the lead which spreads in the circumferential direction of the stator 50 in the flat lead structure is the cross-sectional area of each strand Can be effectively suppressed beyond thinning in the radial direction by the third device. And by making it the structure which twisted the several strand, with respect to the magnetomotive force from a conductor, the eddy current with respect to the magnetic flux which generate
  • the torque enhancement can be performed while suppressing the eddy current loss due to the high magnetic force while adopting the magnet with the high magnetic force, which is the second device.
  • FIG. 8 is a cross-sectional view of the rotor 40 and the stator 50
  • FIG. 9 is an enlarged view of a part of the rotor 40 and the stator 50 shown in FIG.
  • FIG. 10 is a cross-sectional view showing a cross-section of the stator 50 along the line XX in FIG. 11, and
  • FIG. 11 is a cross-sectional view showing a vertical cross-section of the stator 50.
  • FIG. 12 is a perspective view of the stator winding 51.
  • FIGS. 8 and 9 the magnetization directions of the magnets in the magnet unit 42 are indicated by arrows.
  • the stator core 52 has a cylindrical shape in which a plurality of electromagnetic steel sheets are stacked in the axial direction and has a predetermined thickness in the radial direction, and is on the rotor 40 side.
  • the stator winding 51 is to be assembled radially outward.
  • the outer peripheral surface on the side of the rotor 40 is a conductor installation portion (conductor area).
  • the outer peripheral surface of the stator core 52 is in the form of a curved surface without unevenness, and on the outer peripheral surface, a plurality of wire groups 81 are arranged at predetermined intervals in the circumferential direction.
  • the stator core 52 functions as a back yoke that is part of a magnetic circuit for rotating the rotor 40.
  • teeth i.e., iron cores
  • the resin material of the sealing member 57 enters the gaps 56 of the respective lead groups 81. That is, in the stator 50, an inter-lead member provided between the wire groups 81 in the circumferential direction is configured as a sealing member 57 which is a nonmagnetic material.
  • each lead wire group 81 is composed of two conductors 82 as will be described later, and only the nonmagnetic material is occupied between each two lead wire groups 81 adjacent in the circumferential direction of the stator 50.
  • the nonmagnetic material includes, in addition to the sealing member 57, a nonmagnetic gas such as air and a nonmagnetic liquid.
  • the sealing member 57 is also referred to as a conductor-to-conductor member.
  • the configuration in which the teeth are provided between the wire groups 81 aligned in the circumferential direction means that the teeth have a predetermined thickness in the radial direction and a predetermined width in the circumferential direction. It can be said that a part of the magnetic circuit, that is, a magnet magnetic path is formed between 81 and 81. In this respect, the configuration in which the teeth are not provided between the conductive wire groups 81 can be said to be a configuration in which the above magnetic circuit is not formed.
  • the stator winding (that is, armature winding) 51 has a predetermined thickness T2 (hereinafter, also referred to as a first dimension) and a width W2 (hereinafter, also referred to as a second dimension). It is formed.
  • the thickness T2 is the shortest distance between the outer surface and the inner surface facing each other in the radial direction of the stator winding 51.
  • the width W2 functions as one of the polyphases of the stator winding 51 (in the embodiment, three phases: U phase, V phase and W phase, or three phases of X phase, Y phase and Z phase). It is a circumferential length of a part of the stator winding 51 of the secondary winding 51. Specifically, in FIG.
  • the two wire groups 81 adjacent in the circumferential direction function as one of the three phases, for example, as a U phase
  • the two wire groups 81 in the circumferential direction end to end
  • the width is up to W2.
  • the thickness T2 is smaller than the width W2.
  • thickness T2 is smaller than the sum total width dimension of two conducting wire groups 81 which exist in width W2.
  • the cross-sectional shape of the stator winding 51 (more specifically, the conducting wire 82) is a true circular shape, an elliptical shape, or a polygonal shape, of the cross sections of the conducting wire 82 along the radial direction of the stator 50,
  • the maximum radial length of the stator 50 in the cross section may be W12, and the maximum circumferential length of the stator 50 in the cross section may be W11.
  • the stator winding 51 is sealed by a sealing member 57 made of a synthetic resin material as a sealing material (mold material). That is, the stator winding 51 is molded by the molding material together with the stator core 52.
  • the sealing member 57 is provided with a synthetic resin material filled between the wire groups 81, that is, in the gap 56, and between the wire groups 81 by the sealing member 57.
  • an insulating member is interposed. That is, the sealing member 57 functions as an insulating member in the gap 56.
  • Sealing member 57 includes all the wire groups 81 outside the stator core 52 in the radial direction, that is, in a range in which the radial thickness dimension is larger than the radial thickness dimension of each wire group 81. It is provided.
  • the sealing member 57 is provided in a range including the turn portion 84 of the stator winding 51.
  • a sealing member 57 is provided on the inner side in the radial direction of the stator winding 51 in a range including at least a part of the end face of the stator core 52 facing in the axial direction.
  • the stator winding 51 is resin-sealed substantially in its entirety except the end of the phase winding of each phase, that is, the connection terminal with the inverter circuit.
  • the laminated steel plate of the stator core 52 can be pressed axially inward by the sealing member 57. Thereby, the lamination state of each steel plate can be held using sealing member 57.
  • the inner peripheral surface of the stator core 52 is not resin-sealed, instead of this, the entire stator core 52 including the inner peripheral surface of the stator core 52 is resin-sealed It may be a configuration.
  • the sealing member 57 is made of a high heat resistant fluororesin, epoxy resin, PPS resin, PEEK resin, LCP resin, silicon resin, PAI resin, PI resin, etc. It is preferable that it is comprised. Also, in view of the linear expansion coefficient from the viewpoint of suppressing cracking due to the expansion difference, it is desirable that the material is the same as the outer coating of the lead of the stator winding 51. That is, a silicone resin whose linear expansion coefficient is generally twice or more that of other resins is desirably excluded. In electric products such as electric vehicles which do not have an engine utilizing combustion, PPO resin, phenol resin, and FRP resin having heat resistance of about 180 ° C. are also candidates. This is not the case in the field where the ambient temperature of the rotating electrical machine can be considered to be less than 100 ° C.
  • the torque of the rotating electrical machine 10 is proportional to the magnitude of the magnetic flux.
  • the maximum amount of magnetic flux at the stator is limited depending on the saturation magnetic flux density at the teeth, but the stator core does not have teeth. In that case, the maximum amount of flux at the stator is not limited. Therefore, the configuration is advantageous in increasing the current supplied to the stator winding 51 to increase the torque of the rotating electrical machine 10.
  • the inductance of the stator 50 is reduced.
  • the inductance is, for example, around 1 mH, whereas in the stator 50 of the present embodiment, the inductance is It is reduced to about 5 to 60 ⁇ H.
  • the mechanical time constant Tm can be reduced by reducing the inductance of the stator 50 while using the rotary electric machine 10 having the outer rotor structure. That is, the mechanical time constant Tm can be reduced while achieving high torque.
  • the mechanical time constant Tm (J ⁇ L) / (Kt ⁇ Ke) In this case, it can be confirmed that the mechanical time constant Tm is reduced by the reduction of the inductance L.
  • Each group of conducting wires 81 on the radially outer side of the stator core 52 is configured by arranging a plurality of conducting wires 82 having a flat rectangular shape in cross section in the radial direction of the stator core 52.
  • Each conducting wire 82 is arranged in a direction such that "radial dimension ⁇ circumferential dimension" in the cross section.
  • thickness reduction in the radial direction is achieved in each wire group 81.
  • region extends flatly to the area
  • each of the conductor groups 81 and each of the conductors 82 are also referred to as conductive members (conductive members).
  • the conductor area occupied by the stator winding 51 in one circumferential direction is designed to be larger than the conductor non-occupied area where the stator winding 51 does not exist. be able to.
  • the conductor area / conductor non-occupied area in one circumferential direction of the stator winding is 1 or less.
  • the conductor groups 81 are provided such that the conductor area is equal to the non-conducted area or the conductor area is larger than the non-occupied area.
  • the thickness dimension in the radial direction of the wire group 81 is smaller than the width dimension in the circumferential direction of one phase in one magnetic pole. That is, in the configuration in which the wire group 81 is composed of two layers of wire 82 in the radial direction and two wire groups 81 are provided in the circumferential direction per one phase in one magnetic pole, the thickness dimension of each wire 82 Tc, when the width dimension of each conducting wire 82 in the circumferential direction is Wc, it is configured to be “Tc ⁇ 2 ⁇ Wc ⁇ 2”.
  • the conductor wire portions (conductor wire groups 81) arranged at predetermined intervals in the circumferential direction have a thickness dimension in the radial direction that is greater than a width dimension in the circumferential direction of one phase in one magnetic pole. It is small.
  • each of the lead wires 82 preferably has a thickness dimension Tc in the radial direction smaller than a width dimension Wc in the circumferential direction. Furthermore, the radial thickness dimension (2Tc) of the conducting wire group 81 consisting of the two layers of conducting wires 82 in the radial direction, that is, the radial thickness dimension (2Tc) of the conducting wire group 81 is greater than the width dimension Wc in the circumferential direction. It is good to be small.
  • the torque of the rotary electric machine 10 is approximately in inverse proportion to the radial thickness of the stator core 52 of the wire group 81.
  • the configuration is advantageous in achieving an increase in torque of the rotary electric machine 10.
  • the magnetic resistance can be reduced by reducing the distance from the magnet unit 42 of the rotor 40 to the stator core 52 (that is, the distance of the portion without iron). According to this, it is possible to increase the flux linkage of the stator core 52 by the permanent magnet, and to enhance the torque.
  • the thickness of the wire group 81 even if the magnetic flux leaks from the wire group 81, it is easily collected by the stator core 52, and the magnetic flux leaks to the outside without being effectively used for improving the torque. Can be suppressed. That is, it is possible to suppress the decrease in the magnetic force due to the magnetic flux leakage, and it is possible to increase the torque by increasing the flux linkage of the stator core 52 by the permanent magnet.
  • Conductor 82 is a coated conductor in which the surface of conductor body 82a is covered with insulating coating 82b, and between conductor 82 which mutually overlaps in the radial direction, and between conductor 82 and stator core 52 In each case, insulation is secured.
  • the insulating coating 82b is formed of an insulating member that is stacked separately from the coating of the strand 86 if the strand 86 described later is a self-bonding coated line.
  • each phase winding configured by the conducting wire 82 is such that the insulating property by the insulating coating 82 b is maintained except for the exposed portion for connection.
  • the exposed portion is, for example, an input / output terminal portion or a neutral point portion in the case of star connection.
  • the conducting wires 82 adjacent to each other in the radial direction are fixed to each other using a resin fixing or a self-fusion coated wire. Thereby, dielectric breakdown, vibration, and sound due to rubbing between the conducting wires 82 are suppressed.
  • the conductor 82 a is configured as an assembly of a plurality of wires 86.
  • the conductor 82 a is formed in a twisted thread shape by twisting a plurality of strands 86.
  • the strands 86 are configured as a composite obtained by bundling thin fibrous conductive materials 87.
  • the strand 86 is a composite of CNT (carbon nanotube) fibers, and as the CNT fibers, fibers including boron-containing fine fibers in which at least a part of carbon is substituted by boron are used.
  • VGCF vapor grown carbon fibers
  • the surface of the wire 86 is covered with a polymer insulating layer such as enamel. Further, the surface of the strand 86 is preferably covered with a so-called enamel film made of a polyimide film or an amidimide film.
  • the conducting wire 82 constitutes an n-phase winding in the stator winding 51.
  • the strands 86 of each of the leads 82 i.e., the conductors 82a
  • the conductor 82 has a portion where the winding conductor is formed by twisting a plurality of strands 86 at one or more places in the phase, and the resistance value between the strands 86 which are twisted is the strand 86 itself
  • the wire assembly is larger than the resistance value of.
  • the conducting wire 82 is formed of the several strand 86, it may become a strand aggregate
  • the conductor 82 a of the conducting wire 82 is constituted by a plurality of strands 86 twisted together.
  • the insulation method of strands 86 here is not limited to the above-mentioned polymer insulating film, You may be the method of making an electric current hard to flow between strands 86 twisted using contact resistance. That is, if the resistance value between the twisted strands 86 is in a relation larger than the resistance value of the strands 86 themselves, the above effect can be obtained by the potential difference generated due to the difference in the resistance values. .
  • the wire from the moving time and the work interval etc. 86 is preferable because it can oxidize and increase the contact resistance.
  • the conducting wire 82 has a flat rectangular shape in cross section, and is arranged in plural in the radial direction, for example, a plurality of wires covered with a self-fusion coated wire including a fusion layer and an insulating layer
  • the strands of wire 86 are gathered in a twisted state, and their fusion layers are fused to maintain their shape.
  • they may be compacted into a desired shape by a synthetic resin or the like.
  • the thickness of the insulating film 82b in the conducting wire 82 is, for example, 80 ⁇ m to 100 ⁇ m and thicker than the film thickness (5 to 40 ⁇ m) of a commonly used conducting wire, insulation between the conducting wire 82 and the stator core 52 Even without interposing paper or the like, the insulation between the two can be secured.
  • the insulating coating 82 b be configured to have insulation performance higher than that of the strands 86 and to insulate between the phases.
  • the thickness of the polymer insulating layer of the strand 86 is, for example, about 5 ⁇ m
  • the thickness of the insulating coating 82 b of the conducting wire 82 is about 80 ⁇ m to 100 ⁇ m so that the insulation between the phases can be suitably implemented. Is desirable.
  • the structure which the wire 82 is bundled without the several strand 86 being twisted may be sufficient. That is, the conductor 82 has a configuration in which a plurality of strands 86 are twisted in the entire length, a configuration in which a plurality of strands 86 are twisted in part of the entire length, and a plurality of strands 86 are twisted in the entire length It may be any of the configurations bundled.
  • a plurality of strands 86 are bundled, and a strand assembly in which the resistance value between the bundled strands is larger than the resistance of the strand 86 itself It has become.
  • Each conducting wire 82 is bent and formed so as to be arranged in a predetermined arrangement pattern in the circumferential direction of the stator winding 51, whereby a phase winding for each phase is formed as the stator winding 51. .
  • the coil side portions 53 are formed by the linear portions 83 linearly extending in the axial direction of each of the conducting wires 82, and both side outside the coil side portions 53 in the axial direction
  • a coil end 54, 55 is formed by the protruding turn portion 84.
  • Each conducting wire 82 is configured as a series of wave-like conducting wires by alternately repeating the straight portions 83 and the turn portions 84.
  • the straight portions 83 are disposed at positions facing the magnet unit 42 in the radial direction, and in-phase straight portions 83 arranged at predetermined intervals on the axially outer side of the magnet unit 42 are It is mutually connected by the turn part 84. As shown in FIG. The straight portion 83 corresponds to the "magnet facing portion".
  • the stator winding 51 is wound in an annular shape by distributed winding.
  • linear portions 83 are arranged circumferentially at intervals corresponding to one pole pair of the magnet unit 42 for each phase, and in the coil ends 54 and 55, each linear portion 83 for each phase is They are connected to each other by turn portions 84 formed in a substantially V-shape.
  • the directions of the currents of the straight portions 83 corresponding to one pole pair are opposite to each other.
  • the combination of the pair of straight portions 83 connected by the turn portion 84 is different between one coil end 54 and the other coil end 55, and the connection at the coil ends 54 and 55 is in the circumferential direction.
  • the stator winding 51 is formed in a substantially cylindrical shape.
  • the stator winding 51 constitutes a winding for each phase using two pairs of conductors 82 for each phase, and one of the three-phase windings (U A phase, a V phase, a W phase) and the other three phase winding (X phase, Y phase, Z phase) are provided in two layers radially inside and outside.
  • the number of phases of the stator winding 51 is S (6 in the case of the embodiment) and the number per phase of the conducting wire 82 is m
  • 2 ⁇ S ⁇ m 2Sm conducting wires per pole pair 82 will be formed.
  • the linear portions 83 are disposed so as to overlap in two layers adjacent in the radial direction, and in the coil ends 54 and 55, the linear portions overlapping in the radial direction From 83, the turn portions 84 extend in the circumferential direction in directions opposite to each other in the circumferential direction. That is, in each of the conductive wires 82 adjacent in the radial direction, the direction of the turn portion 84 is opposite to each other except for the end of the stator winding 51.
  • FIGS. 15 (a) and 15 (b) are diagrams showing the form of each conducting wire 82 in the n-th layer
  • FIG. 15 (a) is a view of the conducting wire 82 seen from the side of the stator winding 51. The shape is shown, and the shape of the conducting wire 82 seen from one axial direction side of the stator winding 51 is shown in FIG. In FIGS.
  • the positions at which the wire groups 81 are disposed are indicated as D1, D2, D3,.
  • the positions at which the wire groups 81 are disposed are indicated as D1, D2, D3,.
  • only three conducting wires 82 are shown, which are referred to as a first conducting wire 82_A, a second conducting wire 82_B, and a third conducting wire 82_C.
  • the linear portions 83 are all arranged at the n-th layer position, ie, the same position in the radial direction, and the linear portions 83 separated by 6 positions (3 ⁇ m pair) in the circumferential direction It is mutually connected by the turn part 84.
  • the ends of the seven straight portions 83 adjacently arranged in the circumferential direction of the stator winding 51 on the same circle centering on the axial center of the rotor 40. Two are connected to each other by one turn 84.
  • the first conducting wire 82_A a pair of straight portions 83 are disposed at D1 and D7, respectively, and the pair of straight portions 83 are connected by an inverted V-shaped turn portion 84.
  • the other conducting wires 82 _B and 82 _C are arranged in the same n-th layer while shifting their circumferential positions one by one.
  • the turn portions 84 interfere with each other. Therefore, in the present embodiment, in the turn portion 84 of each of the conducting wires 82_A to 82_C, an interference avoidance portion in which a part thereof is offset in the radial direction is formed.
  • the turn portion 84 of each of the conducting wires 82_A to 82_C is one inclined portion 84a which is a portion extending in the circumferential direction on the same circle (first circle), and from the same circle from the inclined portion 84a
  • the peak 84b is also shifted radially inward (upper side in FIG. 15B) and reaches another circle (second circle), the inclined portion 84c circumferentially extending on the second circle and the first circle And a return portion 84d returning to the second circle.
  • the top portion 84 b, the sloped portion 84 c, and the return portion 84 d correspond to the interference avoiding portion.
  • the inclined portion 84c may be configured to shift radially outward with respect to the inclined portion 84a.
  • the turn portion 84 of each of the conducting wires 82_A to 82_C has one side inclined portion 84a and the other side inclined portion 84c on both sides of the top portion 84b which is the center position in the circumferential direction. Positions in the radial direction of the inclined portions 84a and 84c (positions in the front and rear direction in FIG. 15A and positions in the vertical direction in FIG. 15B) are different from each other.
  • the turn portion 84 of the first conductive wire 82_A extends along the circumferential direction starting from the position D1 of the n layer and bent in the radial direction (for example, radially inward) at the top portion 84b which is the center position in the circumferential direction
  • the radial direction for example, the radially outer side
  • one inclined portion 84a is vertically arranged from the top in the order of the first conducting wire 82_A ⁇ the second conducting wire 82_B ⁇ the third conducting wire 82_C, and the conducting wire 82_A ⁇ at the top 84b
  • the upper and lower portions of 82_C are interchanged, and the other inclined portions 84c are arranged vertically in the order of the third conductive wire 82_C, the second conductive wire 82_B, and the first conductive wire 82_A from the top. Therefore, the conductors 82_A to 82_C can be arranged in the circumferential direction without interfering with each other.
  • the insulation properties are due to interference between the lead wires 82 of adjacent layers. It is good to prevent the loss of
  • the lead wires 82 overlapping in the radial direction are bent in the radial direction at the return portion 84d of the turn portion 84, respectively.
  • the radius of curvature of the bent portion may be made different between the n-th conductive wire 82 and the n + 1-th conductive wire 82.
  • the radius of curvature R1 of the radially inner (n-th layer) conducting wire 82 is made smaller than the radius of curvature R2 of the radially outer (n + 1-th) layer conducting wire 82.
  • the shift amount in the radial direction different between the n-th conductive wire 82 and the n + 1-th conductive wire 82.
  • the shift amount S1 of the radially inner (n-th layer) conducting wire 82 is made larger than the shift amount S2 of the radially outer (n + 1-th) conducting wire 82.
  • the magnet unit 42 is a permanent magnet
  • the permanent magnet used in the present embodiment is a sintered magnet obtained by sintering granular magnetic material and forming and solidifying it, and the intrinsic coercivity Hcj on the JH curve is 400 [kA / m] or more.
  • residual magnetic flux density Br is 1.0 [T] or more.
  • Js ⁇ ⁇ is 1 .0 [T] or more.
  • the magnet unit 42 will be supplemented below.
  • the magnet unit 42 (magnet) is characterized in that 2.15 [T] J Js T 1.2 [T].
  • examples of the magnet used for the magnet unit 42 include NdFe11 TiN, Nd2 Fe14 B, Sm2 Fe17 N3, and an FeNi magnet having an L10 type crystal. It is to be noted that a configuration such as SmCo5, which is generally called Samachoba, FePt, Dy2Fe14B, or CoPt can not be used.
  • Dy2Fe14B and Nd2Fe14B generally utilize the heavy rare earth dysprosium to lose some of the high Js properties of neodymium while the high coercivity of Dy has
  • a magnet having the above may satisfy 2.15 [T] s Js 1.2 1.2 [T], and this case can also be adopted. In such a case, for example, it will be called ([Nd1-xDyx] 2Fe14B).
  • a rotating electrical machine that is operated at a temperature outside the human activity range, for example, 60 ° C or higher exceeding the desert temperature, for example, in a motor for motor vehicle application where the temperature in the vehicle approaches 80 ° C if summer
  • the magnet unit 42 is characterized in that the particle size in the fine powder state before orientation is 10 ⁇ m or less and the single magnetic domain particle size or more using the magnet composition.
  • the powder since the coercive force is increased by reducing the size of powder particles to the order of several hundred nm, in recent years, the powder as fine as possible has been used. However, if it is too fine, the BH product of the magnet may be reduced due to oxidation or the like, so a single magnetic domain particle diameter or more is preferable. It is known that if the particle size is up to the single magnetic domain particle size, the coercivity is increased by miniaturization.
  • the size of the particle size described here is the size of the particle size in the fine powder state in the orientation step in the manufacturing process of the magnet.
  • each of the first magnet 91 and the second magnet 92 of the magnet unit 42 is a so-called sintered magnet formed by sintering magnetic powder at a high temperature.
  • the saturation magnetization Js of the magnet unit 42 is 1.2 T or more
  • the crystal grain size of the first magnet 91 and the second magnet 92 is 10 ⁇ m or less
  • the orientation ratio is ⁇
  • Js ⁇ ⁇ is It is performed to satisfy the condition of 1.0 T (Tesla) or more.
  • each of the 1st magnet 91 and the 2nd magnet 92 is sintered so that the following conditions may be satisfied.
  • orientation is performed in the orientation process in the manufacturing process, so that the orientation ratio is obtained unlike the definition of the magnetic force direction in the magnetization process of the isotropic magnet.
  • the saturation magnetization Js of the magnet unit 42 of the present embodiment is as high as 1.2 T or more, and the orientation ratio ⁇ of the first magnet 91 and the second magnet 92 is high so that Jr ⁇ Js ⁇ ⁇ ⁇ 1.0 [T].
  • the orientation rate is set.
  • the orientation ratio ⁇ referred to here is, for example, six easy magnetization axes in each of the first magnet 91 or the second magnet 92, and the direction A10 in which five of them are the same direction is the other one.
  • the first magnet 91 and the second magnet 92 are formed by sintering in the present embodiment, the first magnet 91 and the second magnet 92 may be formed by another method if the above conditions are satisfied. .
  • a method of forming an MQ3 magnet or the like can be employed.
  • the magnetic circuit length inside the magnet is the magnetic circuit length of a linear orientation magnet which emits 1.0 T or more according to the prior art Compared with, it can be longer. That is, the magnetic circuit length per one pole pair can be achieved with a small amount of magnet, and the reversible demagnetization range is maintained even when exposed to severe high-temperature conditions as compared with the design using a conventional linearly oriented magnet. Can.
  • the inventor of the present application has found a configuration that can obtain characteristics close to that of a polar anisotropic magnet even when using a prior art magnet.
  • the magnetization easy axis refers to a crystal orientation that is easily magnetized in a magnet.
  • the direction of the magnetization easy axis in the magnet is a direction in which the orientation ratio, which indicates the degree to which the direction of the magnetization easy axis is aligned, is 50% or more, or a direction in which the orientation of the magnet is averaged.
  • the magnet unit 42 has an annular shape, and is provided on the inner side of the magnet holder 41 (specifically, on the inner side in the radial direction of the cylindrical portion 43).
  • the magnet unit 42 includes a first magnet 91 and a second magnet 92 which are polar anisotropic magnets and have different polarities.
  • the first magnets 91 and the second magnets 92 are alternately arranged in the circumferential direction.
  • the first magnet 91 is a magnet that forms an N pole in a portion close to the stator winding 51
  • the second magnet 92 is a magnet that forms an S pole in a portion close to the stator winding 51.
  • the 1st magnet 91 and the 2nd magnet 92 are permanent magnets which consist of rare earth magnets, such as a neodymium magnet, for example.
  • each of the magnets 91 and 92 is the magnetic pole boundary between the d-axis (direct-axis) which is the magnetic pole center and the N and S poles in the known dq coordinate system (in other words, the magnetic flux density
  • the magnetization direction extends in a circular arc between the q-axis (quadrature of which is 0 Tesla) and the quadrature-axis.
  • the magnetization direction is the radial direction of the annular magnet unit 42 on the d-axis side, and the magnetization direction of the annular magnet unit 42 is the circumferential direction on the q-axis side. This will be described in more detail below.
  • Each of the magnets 91 and 92 has a first portion 250 and two second portions 260 located on both sides of the first portion 250 in the circumferential direction of the magnet unit 42, as shown in FIG.
  • the first portion 250 is closer to the d-axis than the second portion 260
  • the second portion 260 is closer to the q-axis than the first portion 250.
  • the magnet unit 42 is configured such that the direction of the magnetization easy axis 300 of the first portion 250 is more parallel to the d axis than the direction of the magnetization easy axis 310 of the second portion 260.
  • the magnet unit 42 is configured such that the angle ⁇ 11 that the magnetization easy axis 300 of the first portion 250 makes with the d axis is smaller than the angle ⁇ 12 that the magnetization easy axis 310 of the second part 260 makes with the q axis. There is.
  • the angle ⁇ 11 is an angle formed by the d axis and the easy magnetization axis 300 when the direction from the stator 50 (armature) to the magnet unit 42 in the d axis is positive.
  • the angle ⁇ 12 is an angle between the q axis and the easy magnetization axis 310 when the direction from the stator 50 (armature) to the magnet unit 42 in the q axis is positive.
  • both the angle ⁇ 11 and the angle ⁇ 12 are 90 ° or less.
  • each of the magnetization easy axes 300 and 310 has the following definition.
  • the cosine of the angle ⁇ formed by the directions A11 and B11 is taken as the magnetization easy axis 300 or the magnetization easy axis 310.
  • the direction of the magnetization easy axis is different between the d-axis side (portion near the d-axis) and the q-axis side (portion near the q-axis).
  • the direction of the easy axis is close to the direction parallel to the d axis, and on the q axis side, the direction of the easy magnetization axis is close to the direction orthogonal to the q axis.
  • An arc-shaped magnet magnetic path is formed in accordance with the direction of the magnetization easy axis.
  • the magnetization easy axis may be parallel to the d axis on the d axis side, and the magnetization easy axis may be orthogonal to the q axis on the q axis side.
  • the stator side outer surface that is on the stator 50 side (the lower side in FIG. 9) and the end surface on the q axis side in the circumferential direction A magnetic flux path is formed so as to connect the magnetic flux acting surfaces (the outer surface on the stator side and the end surface on the q axis side) of the magnetic flux acting surfaces which are the inflow and outflow surfaces.
  • the magnetic flux flows in an arc shape between adjacent N and S poles by the magnets 91 and 92, so the magnet magnetic path is longer than, for example, a radial anisotropic magnet.
  • the magnetic flux density distribution is close to a sine wave.
  • the magnetic flux can be concentrated on the center side of the magnetic pole, and the torque of the rotating electrical machine 10 can be increased.
  • the magnet unit 42 of this embodiment it can be confirmed that there is a difference in the magnetic flux density distribution as compared with the conventional Halbach-arrayed magnet.
  • the horizontal axis shows the electrical angle
  • the vertical axis shows the magnetic flux density.
  • 90 ° on the horizontal axis indicates the d axis (that is, the center of the magnetic pole)
  • 0 ° and 180 ° on the horizontal axis indicate the q axis.
  • each magnet 91, 92 of the said structure the magnet magnetic flux in d axis
  • magnets 91 and 92 in which the surface magnetic flux change from the q-axis to the d-axis in each magnetic pole is smooth can be suitably realized.
  • the sine wave matching rate of the magnetic flux density distribution may be, for example, 40% or more. In this way, the amount of magnetic flux in the central portion of the waveform can be reliably improved as compared to the case of using a radially oriented magnet or a parallel oriented magnet having a sine wave matching ratio of about 30%. Further, if the sine wave matching ratio is set to 60% or more, the amount of magnetic flux in the central portion of the waveform can be surely improved as compared with the magnetic flux concentration array such as the Halbach array.
  • the magnetic flux density changes sharply near the q-axis.
  • the change in magnetic flux density is steeper, the eddy current generated in the stator winding 51 is increased.
  • the magnetic flux change on the stator winding 51 side is also sharp.
  • the magnetic flux density distribution has a magnetic flux waveform close to a sine wave. Therefore, in the vicinity of the q-axis, the change in magnetic flux density is smaller than the change in magnetic flux density of the radial anisotropic magnet. Thereby, the generation of the eddy current can be suppressed.
  • a magnetic flux is generated in the direction orthogonal to the magnetic flux acting surface 280 on the stator 50 side in the vicinity of the d axis of the magnets 91 and 92 (that is, the center of the magnetic pole).
  • the wire groups 81 are thinned in the radial direction as described above, the radial center position of the wire groups 81 approaches the magnetic flux acting surface of the magnet unit 42, A strong magnetic flux can be received from the rotor 40 at the stator 50.
  • a cylindrical stator core 52 is provided radially inside the stator winding 51, that is, on the opposite side of the rotor 40 with the stator winding 51 interposed therebetween. Therefore, the magnetic flux extending from the magnetic flux acting surface of each of the magnets 91 and 92 is attracted to the stator core 52 and circulates while using the stator core 52 as a part of the magnetic path. In this case, the direction and path of the magnet flux can be optimized.
  • the inverter unit 60 has a unit base 61 and an electric component 62 as shown in FIG. 6, and each operation process including the assembly process of the unit base 61 and the electric component 62 will be described.
  • the assembly consisting of the stator 50 and the inverter unit 60 is taken as a first unit, the assembly consisting of the bearing unit 20, the housing 30 and the rotor 40 as a second unit.
  • This manufacturing process A first step of mounting the electrical component 62 radially inward of the unit base 61; A second step of manufacturing the first unit by mounting the unit base 61 radially inward of the stator 50; A third step of manufacturing the second unit by inserting the fixing portion 44 of the rotor 40 into the bearing unit 20 assembled to the housing 30; A fourth step of mounting the first unit radially inward of the second unit; A fifth step of fastening and fixing the housing 30 and the unit base 61; have.
  • the order of implementation of each of these steps is: first step ⁇ second step ⁇ third step ⁇ fourth step ⁇ fifth step.
  • the assemblies are assembled together, Ease of handling and complete inspection of each unit can be realized, making it possible to construct a rational assembly line. Therefore, it is possible to easily cope with multi-variety production.
  • a good thermal conductor having good thermal conductivity is attached to at least one of the radially inner side of the unit base 61 and the radial direction outer side of the electric component 62 by coating, adhesion or the like.
  • the electrical component 62 may be attached to the unit base 61.
  • the insertion operation of the rotor 40 may be performed while maintaining the coaxial between the housing 30 and the rotor 40.
  • the position of the outer peripheral surface of the rotor 40 (the outer peripheral surface of the magnet holder 41) or the inner peripheral surface of the rotor 40 (the inner peripheral surface of the magnet unit 42) is determined based on the inner peripheral surface of the housing 30
  • Assembly of the housing 30 and the rotor 40 is performed using a jig and sliding either the housing 30 or the rotor 40 along the jig.
  • the two units may be assembled while maintaining the coaxiality between the first unit and the second unit.
  • the first unit and the second unit are assembled while sliding one of them.
  • the assembly can be performed while preventing mutual interference between the rotor 40 and the stator 50 in an extremely small gap, so that the assembly winding is caused by damage to the stator winding 51, chipping of the permanent magnet, or the like. It will be possible to eradicate defective products.
  • FIG. 19 is an electric circuit diagram of a control system of rotary electric machine 10
  • FIG. 20 is a functional block diagram showing control processing by control device 110.
  • FIG. 19 two sets of three-phase windings 51a and 51b are shown as the stator winding 51, and the three-phase winding 51a is composed of a U-phase winding, a V-phase winding and a W-phase winding,
  • the phase winding 51b is composed of an X-phase winding, a Y-phase winding and a Z-phase winding.
  • a first inverter 101 and a second inverter 102 corresponding to the power converter are provided for each of the three-phase windings 51a and 51b.
  • the inverters 101 and 102 are configured by full bridge circuits having upper and lower arms equal in number to the number of phases of the phase windings, and the switches (semiconductor switching elements) provided on each arm turn on and off the stator winding 51. The conduction current is adjusted in each phase winding.
  • a DC power supply 103 and a smoothing capacitor 104 are connected in parallel to each of the inverters 101 and 102.
  • the DC power supply 103 is configured of, for example, a battery pack in which a plurality of single cells are connected in series.
  • the switches of the inverters 101 and 102 correspond to the semiconductor module 66 shown in FIG. 1 and the like, and the capacitor 104 corresponds to the capacitor module 68 shown in FIG. 1 and the like.
  • the control device 110 includes a microcomputer including a CPU and various memories, and performs energization control by turning on and off each switch in the inverters 101 and 102 based on various detection information in the rotating electric machine 10 and a request for powering drive and power generation. carry out.
  • the control device 110 corresponds to the control device 77 shown in FIG.
  • the detection information of the rotating electrical machine 10 includes, for example, a rotation angle (electrical angle information) of the rotor 40 detected by an angle detector such as a resolver, a power supply voltage (inverter input voltage) detected by a voltage sensor, and a current sensor The conduction current of each phase detected by is included.
  • Control device 110 generates and outputs operation signals for operating the switches of inverters 101 and 102.
  • the request for power generation is, for example, a request for regenerative drive when the rotating electrical machine 10 is used as a vehicle power source.
  • the first inverter 101 is provided with a series connection of an upper arm switch Sp and a lower arm switch Sn in three phases consisting of a U phase, a V phase and a W phase.
  • the high potential side terminal of the upper arm switch Sp of each phase is connected to the positive terminal of the DC power supply 103, and the low potential side terminal of the lower arm switch Sn of each phase is connected to the negative terminal (ground) of the DC power supply 103 .
  • One end of each of a U-phase winding, a V-phase winding, and a W-phase winding is connected to an intermediate connection point between the upper arm switch Sp and the lower arm switch Sn of each phase.
  • These respective phase windings are star-connected (Y-connected), and the other ends of the respective phase windings are connected to each other at a neutral point.
  • the second inverter 102 has a configuration similar to that of the first inverter 101, and includes a series connection of an upper arm switch Sp and a lower arm switch Sn in three phases consisting of X phase, Y phase and Z phase. ing.
  • the high potential side terminal of the upper arm switch Sp of each phase is connected to the positive terminal of the DC power supply 103, and the low potential side terminal of the lower arm switch Sn of each phase is connected to the negative terminal (ground) of the DC power supply 103 .
  • One end of each of an X-phase winding, a Y-phase winding, and a Z-phase winding is connected to an intermediate connection point between the upper arm switch Sp and the lower arm switch Sn of each phase.
  • These respective phase windings are star-connected (Y-connected), and the other ends of the respective phase windings are connected to each other at a neutral point.
  • FIG. 20 shows current feedback control processing for controlling each phase current of U, V and W phases, and current feedback control processing for controlling each phase current of X, Y and Z phases.
  • control processing on the U, V, and W phases will be described.
  • current command value setting unit 111 uses a torque-dq map, based on a powering torque command value or a power generation torque command value for rotating electric machine 10, or based on an electrical angular velocity ⁇ obtained by time differentiation of electrical angle ⁇ . , D-axis current command value and q-axis current command value are set.
  • the current command value setting unit 111 is commonly provided on the U, V, W phase side and the X, Y, Z phase side.
  • the power generation torque command value is, for example, a regenerative torque command value when the rotary electric machine 10 is used as a vehicle power source.
  • the dq conversion unit 112 is orthogonal 2 in which a current detection value (three phase currents) by a current sensor provided for each phase is taken as a d-axis with a direction of an axis of a magnetic field or field direction. It is converted into d-axis current and q-axis current which are components of a three-dimensional rotational coordinate system.
  • the d-axis current feedback control unit 113 calculates a d-axis command voltage as an operation amount for feedback controlling the d-axis current to the d-axis current command value. Further, the q-axis current feedback control unit 114 calculates a q-axis command voltage as an operation amount for feedback controlling the q-axis current to the q-axis current command value. Each of these feedback control units 113 and 114 calculates a command voltage using a PI feedback method based on the deviation of the d-axis current and the q-axis current from the current command value.
  • the three-phase conversion unit 115 converts the d-axis and q-axis command voltages into U-phase, V-phase, and W-phase command voltages.
  • Each of the units 111 to 115 described above is a feedback control unit that performs feedback control of the fundamental wave current according to the dq conversion theory, and the command voltages of the U phase, the V phase and the W phase are feedback control values.
  • the operation signal generation unit 116 generates an operation signal of the first inverter 101 based on the three-phase command voltage using a known triangular wave carrier comparison method. Specifically, the operation signal generation unit 116 switches the upper and lower arms in each phase by PWM control based on a magnitude comparison between a signal obtained by standardizing the three-phase command voltages with the power supply voltage and a carrier signal such as a triangular wave signal. An operation signal (duty signal) is generated.
  • the same configuration is also applied to the X, Y, and Z phases, and the dq conversion unit 122 determines the field direction of the current detection value (three phase currents) by the current sensor provided for each phase. It is converted into a d-axis current and a q-axis current which are components of an orthogonal two-dimensional rotational coordinate system as the d-axis.
  • the d-axis current feedback control unit 123 calculates the d-axis command voltage
  • the q-axis current feedback control unit 124 calculates the q-axis command voltage.
  • the three-phase conversion unit 125 converts the d-axis and q-axis command voltages into X-phase, Y-phase, and Z-phase command voltages.
  • the operation signal generation unit 126 generates an operation signal of the second inverter 102 based on the three-phase command voltages. Specifically, the operation signal generation unit 126 switches the upper and lower arms in each phase by PWM control based on magnitude comparison between a signal obtained by standardizing the three-phase command voltage with the power supply voltage and a carrier signal such as a triangular wave signal. An operation signal (duty signal) is generated.
  • the driver 117 turns on / off the three-phase switches Sp and Sn in the inverters 101 and 102 based on the switch operation signals generated by the operation signal generation units 116 and 126.
  • Control device 110 selects and executes one of torque feedback control processing and current feedback control processing based on the operating conditions of rotating electrical machine 10.
  • FIG. 21 shows torque feedback control processing corresponding to the U, V, and W phases, and torque feedback control processing corresponding to the X, Y, and Z phases.
  • FIG. 21 shows torque feedback control processing corresponding to the U, V, and W phases, and torque feedback control processing corresponding to the X, Y, and Z phases.
  • the same components as in FIG. 20 are assigned the same reference numerals and descriptions thereof will be omitted.
  • control processing on the U, V, and W phases will be described.
  • the voltage amplitude calculation unit 127 is a command value of the magnitude of the voltage vector based on the powering torque command value or the power generation torque command value for the rotary electric machine 10 and the electric angular velocity ⁇ obtained by time-differentiating the electric angle ⁇ . Calculate voltage amplitude command.
  • the torque estimation unit 128 a calculates a torque estimated value corresponding to the U, V, and W phases based on the d-axis current and the q-axis current converted by the dq conversion unit 112.
  • the torque estimation unit 128a may calculate the voltage amplitude command based on the map information in which the d-axis current, the q-axis current, and the voltage amplitude command are related.
  • Torque feedback control unit 129a calculates a voltage phase command that is a command value of the phase of the voltage vector, as an operation amount for feedback controlling the torque estimated value to the powering torque command value or the power generation torque command value.
  • the torque feedback control unit 129a calculates a voltage phase command using a PI feedback method based on the power running torque command value or the deviation of the torque estimated value from the power generation torque command value.
  • the operation signal generation unit 130 a generates an operation signal of the first inverter 101 based on the voltage amplitude command, the voltage phase command, and the electrical angle ⁇ . Specifically, the operation signal generation unit 130a calculates a three-phase command voltage based on the voltage amplitude command, the voltage phase command, and the electrical angle ⁇ , and normalizes the calculated three-phase command voltage with the power supply voltage.
  • the switch operation signal of the upper and lower arms in each phase is generated by PWM control based on the magnitude comparison between the signal and the carrier signal such as the triangular wave signal.
  • the operation signal generation unit 130a is based on pulse pattern information which is map information in which a voltage amplitude command, a voltage phase command, an electrical angle ⁇ and a switch operation signal are related, a voltage amplitude command, a voltage phase command and an electrical angle ⁇ .
  • the switch operation signal may be generated.
  • the X-, Y-, and Z-phase sides have the same configuration, and the torque estimation unit 128 b determines the X, Y, and Z based on the d-axis current and the q-axis current converted by the dq conversion unit 122. An estimated torque value corresponding to the Z phase is calculated.
  • the torque feedback control unit 129 b calculates a voltage phase command as an operation amount for performing feedback control of the torque estimated value to the powering torque command value or the power generation torque command value.
  • the torque feedback control unit 129 b calculates a voltage phase command using a PI feedback method based on the power running torque command value or the deviation of the torque estimated value from the power generation torque command value.
  • the operation signal generation unit 130 b generates an operation signal of the second inverter 102 based on the voltage amplitude command, the voltage phase command, and the electrical angle ⁇ . Specifically, the operation signal generation unit 130b calculates a three-phase command voltage based on the voltage amplitude command, the voltage phase command, and the electrical angle ⁇ , and normalizes the calculated three-phase command voltage with the power supply voltage.
  • the switch operation signal of the upper and lower arms in each phase is generated by PWM control based on the magnitude comparison between the signal and the carrier signal such as the triangular wave signal.
  • the driver 117 turns on / off the three-phase switches Sp and Sn in the inverters 101 and 102 based on the switch operation signals generated by the operation signal generation units 130a and 130b.
  • the operation signal generation unit 130b is based on pulse pattern information which is map information in which a voltage amplitude command, a voltage phase command, an electrical angle ⁇ and a switch operation signal are related, a voltage amplitude command, a voltage phase command and an electrical angle ⁇ .
  • the switch operation signal may be generated.
  • the first galvanic corrosion countermeasure is a galvanic corrosion suppression countermeasure by reducing the inductance along with making the stator 50 coreless and making the magnet magnetic flux of the magnet unit 42 smooth.
  • the second countermeasure against electrolytic corrosion is a countermeasure against the electrolytic corrosion due to the rotary shaft having a cantilever structure by the bearings 21 and 22.
  • the third galvanic corrosion countermeasure is a galvanic corrosion suppression countermeasure by molding the annular stator winding 51 together with the stator core 52 with a molding material. The details of each of these measures are individually described below.
  • the gaps between the wire groups 81 in the circumferential direction are made teethless, and between the wire groups 81, a seal made of nonmagnetic material instead of teeth (iron core) A member 57 is provided (see FIG. 10).
  • the inductance of the stator 50 can be reduced.
  • the inductance of the d axis may be equal to or less than the inductance of the q axis.
  • orientation is made such that the direction of the magnetization easy axis is parallel to the d axis on the d axis side as compared to the q axis side (see FIG. 9).
  • the magnet magnetic flux in the d-axis is strengthened, and the surface magnetic flux change (increase or decrease of the magnetic flux) from the q-axis to the d-axis in each magnetic pole becomes smooth. Therefore, the rapid voltage change resulting from the switching imbalance is suppressed, and as a result, the configuration can contribute to the electrolytic corrosion suppression.
  • the bearings 21 and 22 are arranged to be biased to one side in the axial direction with respect to the axial center of the rotor 40 (see FIG. 2).
  • the influence of the electrolytic corrosion can be reduced as compared with the configuration in which the plurality of bearings are provided on both sides of the rotor in the axial direction. That is, in the configuration in which the rotor is supported on both sides by a plurality of bearings, a closed circuit passing through the rotor, the stator, and each bearing (that is, each bearing on both sides in the axial direction across the rotor) There is concern about the electrolytic corrosion of the bearing due to the axial current.
  • the above-mentioned closed circuit is not formed, and the electrolytic corrosion of the bearings is suppressed.
  • the rotary electric machine 10 has the following configuration in connection with a configuration for one-side arrangement of the bearings 21 and 22.
  • a contact avoiding portion that extends in the axial direction to avoid contact with the stator 50 is provided in the radially extending intermediate portion 45 of the rotor 40 (see FIG. 2).
  • the closed circuit of the axial current is formed via the magnet holder 41, it is possible to increase the closed circuit length and increase the circuit resistance. Thereby, suppression of the electrolytic corrosion of the bearings 21 and 22 can be aimed at.
  • the holding member 23 of the bearing unit 20 is fixed to the housing 30 on one side of the rotor 40 in the axial direction, and the housing 30 and the unit base 61 (stator holder) are connected to each other on the other side. (See Figure 2). According to this configuration, it is possible to preferably realize a configuration in which the bearings 21 and 22 are disposed on one side in the axial direction in the axial direction of the rotating shaft 11 in a biased manner. Further, in the present configuration, the unit base 61 is connected to the rotating shaft 11 through the housing 30, so that the unit base 61 can be disposed at a position electrically separated from the rotating shaft 11. When an insulating member such as a resin is interposed between the unit base 61 and the housing 30, the unit base 61 and the rotating shaft 11 are electrically separated further. Thereby, the electrolytic corrosion of the bearings 21 and 22 can be suppressed appropriately.
  • the axial voltage acting on the bearings 21 and 22 is reduced by the arrangement of the bearings 21 and 22 on one side or the like. Also, the potential difference between the rotor 40 and the stator 50 is reduced. Therefore, even if the conductive grease is not used in the bearings 21 and 22, the potential difference acting on the bearings 21 and 22 can be reduced.
  • the conductive grease generally contains fine particles such as carbon, and therefore it is considered that noise is generated.
  • non-conductive grease is used in the bearings 21 and 22. Therefore, it is possible to suppress the occurrence of noise in the bearings 21 and 22.
  • measures against the sounding of the rotary electric machine 10 are required, but it is possible to preferably implement the measures against the sounding.
  • the stator winding 51 and the stator core 52 are molded with a molding material to suppress positional deviation of the stator winding 51 in the stator 50 (see FIG. 11). ).
  • the stator winding 51 since there is no inter-lead member (teeth) between the conductor wire groups 81 in the circumferential direction of the stator winding 51, there is a concern that positional deviation in the stator winding 51 may occur.
  • the stator winding 51 together with the stator core 52 the displacement of the conductor position of the stator winding 51 is suppressed. Therefore, distortion of magnetic flux due to positional deviation of the stator winding 51 and generation of electrolytic corrosion of the bearings 21 and 22 resulting therefrom can be suppressed.
  • the unit base 61 as a housing member for fixing the stator core 52 is made of carbon fiber reinforced plastic (CFRP), discharge to the unit base 61 is suppressed as compared with, for example, aluminum. As a result, suitable electrolytic corrosion measures are possible.
  • CFRP carbon fiber reinforced plastic
  • the magnet unit 42 is configured using a magnet arrangement called a Halbach arrangement. That is, the magnet unit 42 has a first magnet 131 whose radial direction is the magnetization direction (direction of magnetization vector) and a second magnet 132 whose circumferential direction is the magnetization direction (direction of the magnetization vector), The first magnets 131 are disposed at predetermined intervals in the circumferential direction, and the second magnets 132 are disposed at positions between the adjacent first magnets 131 in the circumferential direction.
  • the first magnet 131 and the second magnet 132 are permanent magnets made of, for example, a rare earth magnet such as a neodymium magnet.
  • the first magnets 131 are spaced apart from each other in the circumferential direction such that poles on the side (radially inner side) facing the stator 50 are alternately N poles and S poles. Further, the second magnets 132 are arranged adjacent to the first magnets 131 so that the polarities alternate in the circumferential direction.
  • the cylindrical portion 43 provided to surround the magnets 131 and 132 may be a soft magnetic core made of a soft magnetic material and functions as a back core.
  • the relationship of the magnetization easy axis with respect to the d axis and the q axis in the dq coordinate system of the magnet unit 42 of the second embodiment is also the same as that of the first embodiment.
  • a magnetic body 133 made of a soft magnetic material is disposed radially outside the first magnet 131, that is, on the side of the cylindrical portion 43 of the magnet holder 41.
  • the magnetic body 133 may be made of a magnetic steel sheet, a soft iron, or a dust core material.
  • the circumferential length of the magnetic body 133 is the same as the circumferential length of the first magnet 131 (in particular, the circumferential length of the outer peripheral portion of the first magnet 131).
  • the thickness in the radial direction of the one-piece in the state in which the first magnet 131 and the magnetic body 133 are integrated is the same as the thickness in the radial direction of the second magnet 132.
  • the thickness of the first magnet 131 in the radial direction is thinner than that of the second magnet 132 by the amount of the magnetic substance 133.
  • the magnets 131 and 132 and the magnetic body 133 are fixed to each other by, for example, an adhesive.
  • the radially outer side of the first magnet 131 is the opposite side to the stator 50
  • the magnetic body 133 is the opposite side to the stator 50 of both sides of the first magnet 131 in the radial direction Provided on the stator side).
  • a key 134 is formed as a convex portion protruding radially outward, that is, the cylindrical portion 43 side of the magnet holder 41. Further, on the inner peripheral surface of the cylindrical portion 43, a key groove 135 is formed as a recess for accommodating the key 134 of the magnetic body 133.
  • the protruding shape of the keys 134 and the groove shape of the key grooves 135 are the same, and the key grooves 135 equal in number to the keys 134 are formed corresponding to the keys 134 formed on each magnetic body 133.
  • the key 134 and the key groove 135 may be provided on either of the cylindrical portion 43 and the magnetic body 133 of the magnet holder 41, and contrary to the above, on the outer peripheral portion of the magnetic body 133 It is also possible to provide the key groove 135 and to provide the key 134 on the inner peripheral portion of the cylindrical portion 43 of the magnet holder 41.
  • the magnet unit 42 it is possible to increase the magnetic flux density in the first magnet 131 by arranging the first magnet 131 and the second magnet 132 alternately. Therefore, in the magnet unit 42, magnetic flux can be concentrated on one side, and the magnetic flux can be strengthened on the side closer to the stator 50.
  • the magnet unit 42 of the present embodiment has a configuration in which a portion where demagnetization easily occurs in the first magnet 131 is replaced with the magnetic body 133.
  • FIGS. 24 (a) and 24 (b) are diagrams specifically showing the flow of magnetic flux in the magnet unit 42, and FIG. 24 (a) is a conventional configuration in which the magnetic unit 133 is not included in the magnet unit 42.
  • FIG. 24B shows the case where the configuration of the present embodiment in which the magnetic unit 133 is provided in the magnet unit 42 is used.
  • the cylindrical portion 43 of the magnet holder 41 and the magnet unit 42 are expanded linearly and shown, and the lower side of the drawing is the stator side and the upper side is the opposite stator. It is on the side.
  • the magnetic flux acting surface of the first magnet 131 and the side surface of the second magnet 132 are in contact with the inner peripheral surface of the cylindrical portion 43, respectively. Further, the magnetic flux acting surface of the second magnet 132 is in contact with the side surface of the first magnet 131.
  • the magnetic substance 133 is located between the magnetic flux acting surface of the first magnet 131 and the inner circumferential surface of the cylindrical portion 43 on the opposite side of the first magnet 131 to the stator 50. Since it is provided, the magnetic body 133 allows the passage of magnetic flux. Therefore, magnetic saturation in the cylindrical portion 43 can be suppressed, and resistance to demagnetization is improved.
  • the magnet magnetic path passing through the inside of the magnet is longer. Therefore, the magnet permeance is increased, the magnetic force can be increased, and the torque can be increased. Furthermore, the magnetic flux can be concentrated at the center of the d-axis to increase the sine wave matching rate. In particular, the torque can be more effectively enhanced by using a switching IC with a current waveform as a sine wave or a trapezoidal wave or by using a 120-degree conduction switching IC by PWM control.
  • the radial thickness of the stator core 52 is preferably larger than 1/2 or 1/2 of the radial thickness of the magnet unit 42.
  • the radial thickness of the stator core 52 may be 1/2 or more of the radial thickness of the first magnet 131 provided at the magnetic pole center of the magnet unit 42.
  • the radial thickness of the stator core 52 may be smaller than the radial thickness of the magnet unit 42.
  • the magnet magnetic flux is approximately 1 [T] and the saturation magnetic flux density of the stator core 52 is 2 [T]
  • the radial thickness of the stator core 52 is equal to the radial thickness of the magnet unit 42.
  • the magnetic flux leakage to the inner peripheral side of the stator core 52 can be prevented by setting it to 1/2 or more.
  • the magnetic path has a pseudo arc shape, so that the magnetic flux can be increased in proportion to the thickness of the magnet that handles the magnetic flux in the circumferential direction.
  • the magnetic flux flowing to the stator core 52 does not exceed the circumferential magnetic flux. That is, when an iron-based metal having a saturation magnetic flux density of 2 [T] with respect to the magnetic flux of 1 [T] of the magnet is used, magnetic saturation does not occur preferably if the thickness of the stator core 52 is half or more of the magnet thickness.
  • a small and lightweight rotary electric machine can be provided.
  • the demagnetizing field from the stator 50 acts on the magnet flux, the magnet flux is generally 0.9 T or less. Therefore, if the stator core has half the thickness of the magnet, its magnetic permeability can be suitably kept high.
  • the outer peripheral surface of the stator core 52 has a curved surface without unevenness, and the plurality of wire groups 81 are arranged side by side at predetermined intervals on the outer peripheral surface.
  • the stator core 52 is an annular yoke 141 provided on the opposite side of the stator winding 51 in the radial direction to the side opposite to the rotor 40 (the lower side in the drawing)
  • a protrusion 142 extends from the yoke 141 so as to project between the linear portions 83 adjacent in the circumferential direction.
  • the protrusions 142 are provided on the radially outer side of the yoke 141, that is, on the side of the rotor 40 at predetermined intervals.
  • the conductor groups 81 of the stator winding 51 are engaged with the projections 142 in the circumferential direction, and are arranged in the circumferential direction while using the projections 142 as positioning portions for the conductor groups 81.
  • the projection part 142 corresponds to "a member between conducting wires”.
  • the protrusion 142 has a thickness dimension in the radial direction from the yoke 141, in other words, as shown in FIG. 25, from the inner side surface 320 adjacent to the yoke 141 of the straight portion 83 in the radial direction of the yoke 141
  • the distance W to the apex is smaller than half (H1 in the figure) of the thickness dimension in the radial direction of the linear portion 83 adjacent to the yoke 141 in the radial direction among the plurality of linear portions 83 inside and outside the radial direction It is a structure.
  • the dimension (thickness) T1 (the thickness) of the conductive wire group 81 (conductive member) in the radial direction of the stator winding 51 (the stator core 52), in other words, the stator core of the conductive wire group 81
  • the nonmagnetic member (sealing member 57) may occupy a range of three quarters of the surface 320 in contact with the surface 52 and the shortest distance between the surface 330 of the conductor group 81 facing the rotor 40). Due to such thickness limitation of the protrusion 142, the protrusion 142 does not function as teeth between the wire groups 81 (that is, the straight portions 83) adjacent in the circumferential direction, and magnetic paths are not formed by the teeth. .
  • the protrusions 142 may not be all provided between the wire groups 81 aligned in the circumferential direction, and may be provided between at least one pair of wire groups 81 adjacent in the circumferential direction.
  • the protrusions 142 may be provided at equal intervals for each predetermined number between the wire groups 81 in the circumferential direction.
  • the shape of the protrusion 142 may be any shape such as a rectangular shape or an arc shape.
  • the linear portion 83 may be provided in a single layer. Therefore, in a broad sense, the thickness dimension in the radial direction from the yoke 141 in the protrusion 142 may be smaller than 1 ⁇ 2 of the thickness dimension in the radial direction of the straight portion 83.
  • the projection 142 is within the range of the virtual circle. It is preferable that the shape which protrudes from the yoke 141, in other words, the shape which does not protrude in the radial direction outer side (that is, the rotor 40 side) than the virtual circle.
  • the thickness of the protrusion 142 in the radial direction is limited, and the protrusion 142 does not function as teeth between the adjacent linear portions 83 in the circumferential direction.
  • adjacent linear parts 83 can be brought closer.
  • the cross-sectional area of the conductor 82a can be enlarged, and the heat generation which accompanies the energization of the stator winding 51 can be reduced.
  • the absence of the teeth makes it possible to eliminate the magnetic saturation, and it is possible to increase the current flow to the stator winding 51. In this case, an increase in the amount of heat generation can be suitably coped with as the current flows.
  • the turn portion 84 is shifted in the radial direction and has an interference avoiding portion for avoiding interference with other turn portions 84, the different turn portions 84 are separated in the radial direction. It can be arranged. Thereby, the heat dissipation can be improved also in the turn portion 84. As described above, the heat dissipation performance of the stator 50 can be optimized.
  • the thickness dimension of the protrusion 142 in the radial direction is as shown in FIG. Not tied to H1. Specifically, as long as the yoke 141 and the magnet unit 42 are separated by 2 mm or more, the radial thickness dimension of the protrusion 142 may be H1 or more in FIG.
  • the straight portion 83 not adjacent to the yoke 141 may be provided in a range from the yoke 141 to a half position of the second-layer conductive wire 82.
  • the radial thickness dimension of the projection 142 is “H1 ⁇ 3/2”, the effect can be obtained to some extent by enlarging the cross-sectional area of the conductor in the wire group 81.
  • the stator core 52 may be configured as shown in FIG. Although the sealing member 57 is omitted in FIG. 26, the sealing member 57 may be provided. In FIG. 26, for convenience, the magnet unit 42 and the stator core 52 are linearly expanded.
  • the stator 50 has a projection 142 as an inter-wire member between the circumferentially adjacent wires 82 (i.e., the straight portions 83).
  • the stator 50 magnetically functions with one of the magnetic poles (N or S pole) of the magnet unit 42 when the stator winding 51 is energized, and a circumferentially extending portion 350 of the stator 50 is formed.
  • the projection 142 is Wt ⁇ Bs ⁇ Wm ⁇ Br (1) It is comprised by the magnetic material which becomes.
  • the range Wn is set so as to include a plurality of conductor groups 81 adjacent in the circumferential direction, the plurality of conductor groups 81 having overlapping excitation timings. At that time, it is preferable to set the center of the gap 56 of the wire group 81 as a reference (boundary) when setting the range Wn. For example, in the case of the configuration illustrated in FIG. 26, up to the fourth conductor group 81 corresponds to the plurality of conductor groups 81 in order from the shortest in distance from the magnetic pole center of the N pole in the circumferential direction. Then, the range Wn is set to include the four lead wire groups 81. At this time, the end (start and end points) of the range Wn is the center of the gap 56.
  • the three-phase winding of the stator winding 51 is a distributed winding, and in the stator winding 51, the number of the projecting portions 142 with respect to one pole of the magnet unit 42, ie, each The number of gaps 56 between the wire groups 81 is “number of phases ⁇ Q”.
  • Q is the number of the one-phase conducting wire 82 in contact with the stator core 52.
  • the conducting wire 82 is the conducting wire group 81 laminated
  • the total width dimension Wt in the circumferential direction of the protrusions 142 excited by the energization of the stator winding 51 in the range of one pole of the magnet unit 42 is the width in the circumferential direction of the protrusions 142 (that is, the gap 56).
  • the protrusion 142 is configured as a magnetic material that satisfies the relationship of the above (1).
  • the total width dimension Wt is also a circumferential dimension of a portion where the relative permeability can be larger than 1 in one pole. Also, in consideration of the margin, the total width dimension Wt may be the width dimension in the circumferential direction of the protrusion 142 in one magnetic pole.
  • distributed winding means one pole pair period (N pole and S pole) of the magnetic pole, and one pole pair of the stator winding 51.
  • a single pole pair of the stator winding 51 mentioned here is composed of two straight portions 83 and a turn portion 84 electrically connected by the current flow in opposite directions.
  • the concentrated winding referred to here is one in which the width of one pole pair of the magnetic pole is different from the width of one pole pair of the stator winding 51.
  • the concentrated winding three lead groups 81 for one pole pair, three lead groups 81 for two pole pairs, nine lead groups 81 for four pole pairs
  • the wire group 81 has a relationship such as nine for one magnetic pole pair.
  • the stator winding 51 when the stator winding 51 is concentrated, when the three-phase windings of the stator winding 51 are energized in a predetermined order, the stator winding 51 for two phases is excited. As a result, the projections 142 for two phases are excited. Therefore, the circumferential width dimension Wt of the protrusion 142 excited by the energization of the stator winding 51 in the range of one pole of the magnet unit 42 is “A ⁇ 2”. Then, after the width dimension Wt is defined in this way, the protrusion 142 is configured as a magnetic material that satisfies the relationship of the above (1).
  • the sum of the widths of the protrusions 142 in the circumferential direction of the stator 50 is A in a region surrounded by the wire groups 81 of the same phase.
  • Wm in the concentrated winding corresponds to “the entire circumference of the surface of the magnet unit 42 facing the air gap” ⁇ “the number of phases” / “the number of dispersions of the wire groups 81”.
  • the protrusion 142 may be a magnetic material that satisfies the relationship of Wt ⁇ 1/2 ⁇ Wm.
  • the lead 82 when the lead 82 includes the outer coating 182, the lead 82 may be disposed in the circumferential direction of the stator core 52 such that the outer coating 182 of the leads 82 is in contact with each other.
  • Wt can be regarded as zero or the thickness of the outer layer coating 182 of both the leads 82 in contact.
  • the inter-conductor member protrusion 142 which is undesirably small with respect to the magnet flux on the rotor 40 side is provided.
  • the rotor 40 is a surface magnet type rotor having a low inductance and a flat surface, and has no saliency in terms of magnetic resistance.
  • the inductance of the stator 50 can be reduced, and the generation of magnetic flux distortion due to the shift in the switching timing of the stator winding 51 is suppressed, which in turn suppresses the electrolytic corrosion of the bearings 21 and 22. .
  • a toothed portion 143 is provided as an inter-conductor member.
  • the toothed portions 143 are provided at predetermined intervals in the circumferential direction so as to protrude from the yoke 141, and have the same thickness dimension as the wire group 81 in the radial direction.
  • the side surfaces of the teeth 143 are in contact with the leads 82 of the lead group 81. However, there may be a gap between the teeth 143 and the wires 82.
  • the toothed portion 143 is limited in width in the circumferential direction, and is provided with pole teeth (stator teeth) which are undesirably thin with respect to the amount of magnet. With such a configuration, the toothed portion 143 is surely saturated by the magnetic flux of the magnet at 1.8 T or more, and the inductance can be reduced by the reduction of the permeance.
  • the magnetic flux on the magnet unit side is, for example, “Sm ⁇ Br”.
  • the surface area on the rotor side in each toothed portion 143 is St
  • the number per phase of the conducting wire 82 is m
  • the toothed portions 143 for two phases in one pole are excited If so, the magnetic flux on the stator side is, for example, “St ⁇ m ⁇ 2 ⁇ Bs”. in this case, St ⁇ m ⁇ 2 ⁇ Bs ⁇ Sm ⁇ Br (2)
  • the inductance is reduced by limiting the dimension of the toothed portion 143 so that the following relationship is established.
  • the inductance is reduced. If the number m is 1, then the width dimension Wst of the toothed portion 143 may be smaller than 1 ⁇ 4 of the width dimension Wm of one pole of the magnet unit 42.
  • the inter-conductor member (tooth portion 143) is undesirably small with respect to the magnet magnetic flux on the rotor 40 side.
  • the inductance of the stator 50 can be reduced, and the generation of magnetic flux distortion due to the shift in the switching timing of the stator winding 51 is suppressed, which in turn suppresses the electrolytic corrosion of the bearings 21 and 22.
  • the description and definition of the parameters related to the stator 50 such as Wt, Wn, A and Bs etc., and the description and definition of the parameters related to the magnet unit 42 such as Wm and Br etc use the description of the first modification. good.
  • the sealing member 57 covering the stator winding 51 is in a range including all the wire groups 81 at the radial outer side of the stator core 52, that is, the thickness dimension in the radial direction is the diameter of each wire group 81
  • the sealing member 57 is provided so that a part of the conducting wire 82 protrudes.
  • the sealing member 57 is provided in a state in which a part of the conducting wire 82 which is the most radially outward in the conducting wire group 81 is exposed radially outward, that is, the stator 50 side.
  • the radial thickness dimension of the sealing member 57 may be the same as or smaller than the radial thickness dimension of each wire group 81.
  • each wire group 81 may not be sealed by the sealing member 57. That is, the sealing member 57 covering the stator winding 51 is not used. In this case, no inter-conductor member is provided between the wire groups 81 aligned in the circumferential direction, and there is a gap. In short, the inter-conductor member is not provided between the conductor groups 81 aligned in the circumferential direction.
  • the stator 50 may not have the stator core 52.
  • the stator 50 is configured by the stator winding 51 shown in FIG.
  • the stator winding 51 may be sealed with a sealing material.
  • the stator 50 instead of the stator core 52 made of a soft magnetic material, the stator 50 may be configured to include an annular winding holding portion made of a nonmagnetic material such as a synthetic resin.
  • an annular magnet 95 is fixed on the inner side in the radial direction of the cylindrical portion 43 of the magnet holder 41.
  • the annular magnet 95 is provided with a plurality of magnetic poles of alternating polarity in the circumferential direction, and a magnet is integrally formed on both the d axis and the q axis.
  • an arc-shaped magnet magnetic path is formed such that the direction of orientation in the d axis of each magnetic pole is radial and the direction of orientation in the q axis between the magnetic poles is circumferential.
  • the easy magnetization axis is parallel to the d axis or near parallel to the d axis in the part near the d axis, and in the part near the q axis, the easy magnetization axis is orthogonal to the q axis or q It suffices that the orientation is performed so as to form an arc-shaped magnet magnetic path having a direction close to orthogonal.
  • Modification 8 In this modification, a part of the control method of the control device 110 is changed. In this modification, differences from the configuration described in the first embodiment will be mainly described.
  • the operation signal generation unit 116 includes a carrier generation unit 116 a and U, V, W phase comparators 116 b U, 116 b V, and 116 b W.
  • the carrier generation unit 116 a generates and outputs a triangular wave signal as the carrier signal SigC.
  • Carrier signal SigC generated by carrier generation unit 116a and U, V, W-phase command voltage calculated by three-phase conversion unit 115 are input to U, V, W-phase comparators 116bU, 116bV, 116bW. Ru.
  • the U, V, and W phase command voltages are, for example, sinusoidal waveforms, and their phases are shifted by 120 ° in electrical angle.
  • U, V, W phase comparators 116bU, 116bV, 116bW are controlled by the PWM (pulse width modulation) control based on the magnitude comparison between the U, V, W phase command voltages and the carrier signal SigC.
  • An operation signal of each switch Sp, Sn of the upper arm and the lower arm of the H, V, W phases is generated.
  • the operation signal generation unit 116 performs U, V, and W phases by PWM control based on magnitude comparison between a signal obtained by standardizing the U, V, and W phase command voltages with the power supply voltage, and a carrier signal.
  • An operation signal of the switches Sp and Sn is generated.
  • the driver 117 turns on / off the switches Sp and Sn of the U, V, and W phases in the first inverter 101 based on the operation signal generated by the operation signal generation unit 116.
  • the control device 110 performs processing of changing the carrier frequency fc of the carrier signal SigC, that is, the switching frequency of each switch Sp and Sn.
  • the carrier frequency fc is set high in the low torque region or high rotation region of the rotary electric machine 10 and is set low in the high torque region of the rotary electric machine 10. This setting is made to suppress a decrease in controllability of the current flowing in each phase winding.
  • control device 110 changes carrier frequency fc.
  • the process of changing the carrier frequency fc will be described with reference to FIG. This process is repeatedly performed by the control device 110, for example, in a predetermined control cycle as the process of the operation signal generation unit 116.
  • step S10 it is determined whether the current flowing through the winding 51a of each phase is included in the low current region.
  • This process is a process for determining that the current torque of the rotary electric machine 10 is in the low torque region.
  • the following first and second methods may be mentioned.
  • a torque estimated value of the rotary electric machine 10 is calculated. Then, if it is determined that the calculated torque estimated value is less than the torque threshold, it is determined that the current flowing through the winding 51a is included in the low current region, and it is determined that the torque estimated value is equal to or greater than the torque threshold. , And determined to be included in the high current region.
  • the torque threshold may be set to, for example, one half of the starting torque (also referred to as restraining torque) of the rotary electric machine 10.
  • the speed threshold may be set to, for example, a rotational speed when the maximum torque of the rotary electric machine 10 is the torque threshold.
  • step S10 When negative determination is carried out in step S10, it determines with it being a high electric current area
  • the carrier frequency fc is set to the first frequency fL.
  • step S10 When an affirmative determination is made in step S10, the process proceeds to step S12, and the carrier frequency fc is set to a second frequency fH higher than the first frequency fL.
  • the carrier frequency fc is set higher in the case where the current flowing in each phase winding is included in the low current region than in the case where the current is included in the high current region. Therefore, in the low current region, the switching frequency of the switches Sp and Sn can be increased, and an increase in current ripple can be suppressed. Thereby, the decrease in current controllability can be suppressed.
  • the carrier frequency fc when the current flowing in each phase winding is included in the high current region, the carrier frequency fc is set lower than that in the low current region.
  • the carrier frequency fc can be set lower than in the low current region, and the switching loss of each of the inverters 101 and 102 can be reduced.
  • the carrier frequency fc is set to the first frequency fL
  • the carrier frequency fc is gradually changed from the first frequency fL to the second frequency fH when an affirmative determination is made in step S10 of FIG. It is also good.
  • the carrier frequency fc When the carrier frequency fc is set to the second frequency fH, the carrier frequency fc may be gradually changed from the second frequency fH to the first frequency fL when the negative determination is made in step S10. .
  • operation signal of the switch may be generated by space vector modulation (SVM) control. Even in this case, the change of the switching frequency described above can be applied.
  • SVM space vector modulation
  • FIG. 33 (a) is a diagram showing an electrical connection of first and second conductors 88a and 88b which are two pairs of conductors.
  • first and second conducting wires 88a and 88b may be connected in series.
  • FIG. 34 shows a configuration in which four pairs of first to fourth conducting wires 88a to 88d are stacked.
  • the first to fourth conducting wires 88a to 88d are arranged in the radial direction of the first, second, third, and fourth conducting wires 88a, 88b, 88c, 88d in this order from the side closer to the stator core 52. .
  • the third and fourth conducting wires 88c and 88d are connected in parallel, and the first conducting wire 88a is connected to one end of the parallel connection body, and the second conducting wire is connected to the other end. 88b may be connected.
  • the parallel connection can reduce the current density of the parallel connected leads, and can suppress the heat generation at the time of energization.
  • the first and second conducting wires 88a and 88b not connected in parallel abut on the unit base 61
  • the third and fourth conducting wires 88c and 88d disposed on the stator core 52 side and connected in parallel are disposed on the side opposite to the stator core. This makes it possible to equalize the cooling performance of each of the conductors 88a to 88d in the multilayer conductor structure.
  • the thickness dimension in the radial direction of the conductor group 81 including the first to fourth conductors 88a to 88d may be smaller than the width dimension in the circumferential direction of one phase in one magnetic pole.
  • the rotary electric machine 10 may have an inner rotor structure (inner structure).
  • the stator 50 may be provided radially outside, and the rotor 40 may be provided radially inside.
  • the inverter unit 60 be provided on one side or both sides of both axial ends of the stator 50 and the rotor 40.
  • FIG. 35 is a cross-sectional view of the rotor 40 and the stator 50
  • FIG. 36 is an enlarged view of a part of the rotor 40 and the stator 50 shown in FIG.
  • the stator 50 has a stator winding 51 of flat wire structure and a stator core 52 without teeth.
  • the stator winding 51 is assembled on the radially inner side of the stator core 52.
  • the stator core 52 has one of the following configurations, as in the case of the outer rotor structure.
  • an inter-conductor member is provided between the conductor portions in the circumferential direction, and as the inter-conductor member, the circumferential width dimension of the conductor member in one magnetic pole is Wt, saturation of the conductor members Assuming that the magnetic flux density is Bs, the circumferential width dimension of the magnet unit in one magnetic pole is Wm, and the residual magnetic flux density of the magnet unit is Br, a magnetic material having a relationship of Wt ⁇ Bs ⁇ Wm ⁇ Br is used.
  • B In the stator 50, an inter-conductor member is provided between the conductor portions in the circumferential direction, and a nonmagnetic material is used as the inter-conductor member.
  • no inter-conductor member is provided between the conductor portions in the circumferential direction.
  • the magnets 91 and 92 of the magnet unit 42 are oriented such that the direction of the magnetization easy axis is parallel to the d axis on the d axis side, which is the magnetic pole center, as compared to the q axis side that is the magnetic pole boundary. It is configured using The details of the magnetization direction and the like in each of the magnets 91 and 92 are as described above. It is also possible to use an annular magnet 95 (see FIG. 30) in the magnet unit 42.
  • FIG. 37 is a longitudinal sectional view of the rotary electric machine 10 in the case of the inner rotor type, which corresponds to FIG. 2 described above. The differences from the configuration of FIG. 2 will be briefly described.
  • an annular stator 50 is fixed to the inside of the housing 30, and the rotor 40 is rotatably provided on the inside of the stator 50 across a predetermined air gap.
  • each of the bearings 21 and 22 is disposed on one side in the axial direction with respect to the axial center of the rotor 40, whereby the rotor 40 is supported in a cantilever manner.
  • an inverter unit 60 is provided inside the magnet holder 41 of the rotor 40.
  • FIG. 38 shows another configuration as the rotary electric machine 10 of the inner rotor structure.
  • the rotary shaft 11 is rotatably supported by the bearings 21 and 22 in the housing 30, and the rotor 40 is fixed to the rotary shaft 11.
  • the bearings 21 and 22 are disposed offset to one side in the axial direction with respect to the axial center of the rotor 40.
  • the rotor 40 has a magnet holder 41 and a magnet unit 42.
  • the inverter unit 60 is not provided inside the rotor 40 in the radial direction.
  • the magnet holder 41 is connected to the rotating shaft 11 at a position that is radially inward of the magnet unit 42.
  • the stator 50 also has a stator winding 51 and a stator core 52 and is attached to the housing 30. Descriptions and definitions of parameters related to the stator 50 such as Wt, Wn, Wm and Bs, etc., and descriptions and definitions of parameters related to the magnet unit 42 such as ⁇ 11 and ⁇ 12, X1, X2, Wm and Br The description in the one embodiment or the modified example 1 may be used.
  • FIG. 39 is an exploded perspective view of the rotary electric machine 200
  • FIG. 40 is a side cross-sectional view of the rotary electric machine 200.
  • the vertical direction is shown based on the states of FIGS. 39 and 40.
  • the rotary electric machine 200 is rotatably disposed inside the stator core 201 and a stator 203 having an annular stator core 201 and multiphase stator windings 202. And a rotor 204.
  • the stator 203 corresponds to an armature
  • the rotor 204 corresponds to a field element.
  • the stator core 201 is configured by laminating a large number of silicon steel plates, and the stator winding 202 is attached to the stator core 201.
  • the rotor 204 has a rotor core and a plurality of permanent magnets as a magnet unit.
  • the rotor core is provided with a plurality of magnet insertion holes at equal intervals in the circumferential direction.
  • permanent magnets magnetized so as to alternately change the magnetization direction for each adjacent magnetic pole are attached.
  • the permanent magnets of the magnet unit may have a Halbach arrangement as described in FIG. 23 or a similar configuration.
  • the permanent magnet of the magnet unit is a pole whose orientation direction (magnetization direction) extends in an arc between the d axis which is the pole center and the q axis which is the pole boundary as described in FIG. 9 and FIG. It is preferable to have anisotropic characteristics.
  • the stator 203 may have any one of the following configurations.
  • an inter-conductor member is provided between the conductor portions in the circumferential direction, and as the inter-conductor member, the circumferential width dimension of the conductor member in one magnetic pole is Wt, saturation of the conductor members Assuming that the magnetic flux density is Bs, the circumferential width dimension of the magnet unit in one magnetic pole is Wm, and the residual magnetic flux density of the magnet unit is Br, a magnetic material having a relationship of Wt ⁇ Bs ⁇ Wm ⁇ Br is used.
  • an inter-conductor member is provided between the conductor portions in the circumferential direction, and a nonmagnetic material is used as the inter-conductor member.
  • an inter-conductor member is not provided between the conductor portions in the circumferential direction.
  • the magnet unit is oriented such that the direction of the magnetization easy axis is parallel to the d axis on the d axis side, which is the pole center, as compared to the q axis side, which is the pole boundary. It is configured using a plurality of magnets.
  • An annular inverter case 211 is provided on one end side in the axial direction of the rotary electric machine 200.
  • the inverter case 211 is arranged such that the lower surface of the case is in contact with the upper surface of the stator core 201.
  • a plurality of power modules 212 constituting an inverter circuit, a smoothing capacitor 213 for suppressing ripples of voltage and current generated by switching operation of the semiconductor switching element, and a control board 214 having a control unit ,
  • a current sensor 215 for detecting a phase current
  • a resolver stator 216 which is a rotational speed sensor of the rotor 204.
  • the power module 212 has an IGBT or a diode which is a semiconductor switching element.
  • a power connector 217 connected to a DC circuit of a battery mounted on a vehicle, and a signal connector 218 used for delivery of various signals between the rotating electric machine 200 side and the vehicle side control device Is provided.
  • the inverter case 211 is covered by a top cover 219.
  • the direct current power from the on-vehicle battery is inputted through the power connector 217, converted into alternating current by switching of the power module 212, and sent to the stator winding 202 of each phase.
  • the bearing portion 221 On the opposite side of the stator core 201 in the axial direction, on the opposite side of the inverter case 211, there are a bearing portion 221 for rotatably holding the rotation shaft of the rotor 204 and an annular rear case 222 for housing the bearing portion 221. It is provided.
  • the bearing portion 221 has, for example, a pair of bearings, and is disposed so as to be biased to one side in the axial direction with respect to the axial center of the rotor 204.
  • a plurality of bearings in the bearing portion 221 may be dispersed on both sides in the axial direction of the stator core 201, and the rotary shaft may be supported on both sides by the bearings.
  • the rotating electrical machine 200 is mounted on the vehicle side by fixing the rear case 222 to a mounting portion such as a gear case or a transmission of the vehicle.
  • a cooling channel 211a for flowing the refrigerant is formed in the inverter case 211.
  • the cooling flow passage 211 a is formed by closing the space recessed in an annular shape from the lower surface of the inverter case 211 with the upper surface of the stator core 201.
  • the cooling channel 211 a is formed to surround the coil end of the stator winding 202.
  • a module case 212a of the power module 212 is inserted into the cooling flow passage 211a.
  • a cooling channel 222 a is also formed in the rear case 222 so as to surround the coil end of the stator winding 202.
  • the cooling flow path 222 a is formed by closing a space, which is recessed annularly from the upper surface of the rear case 222, with the lower surface of the stator core 201.
  • Descriptions and definitions of parameters related to the stator 50 such as Wt, Wn, Wm and Bs, etc., and descriptions and definitions of parameters related to the magnet unit 42 such as ⁇ 11 and ⁇ 12, X1, X2, Wm and Br
  • the description in the one embodiment or the modified example 1 may be used.
  • FIG. 41 shows the configuration of a rotary armature type rotary electric machine 230. As shown in FIG.
  • bearings 232 are fixed to the housings 231a and 231b, respectively, and the rotary shaft 233 is rotatably supported by the bearings 232.
  • the bearing 232 is, for example, an oil-impregnated bearing formed by including oil in a porous metal.
  • a rotor 234 as an armature is fixed to the rotating shaft 233.
  • the rotor 234 has a rotor core 235 and a polyphase rotor winding 236 fixed to the outer periphery thereof.
  • the rotor core 235 has a slotless structure
  • the rotor winding 236 has a flat wire structure. That is, the rotor winding 236 has a flat structure in which the region for each phase is longer in the circumferential direction than in the radial direction.
  • a stator 237 as a field element is provided radially outside the rotor 234.
  • the stator 237 has a stator core 238 fixed to the housing 231 a and a magnet unit 239 fixed to the inner peripheral side of the stator core 238.
  • the magnet unit 239 is configured to include a plurality of magnetic poles of alternating polarity in the circumferential direction, and the pole boundary q on the d axis side, which is the center of the magnetic pole, as in the magnet unit 42 described above. It is configured to be oriented such that the direction of the magnetization easy axis is parallel to the d axis as compared to the side of the axis.
  • the magnet unit 239 has a sintered neodymium magnet oriented, and has an intrinsic coercive force of 400 kA / m or more and a residual magnetic flux density of 1.0 T or more.
  • the rotating electrical machine 230 of this example is a coreless motor with a brush of 2 poles and 3 coils, the rotor winding 236 is divided into three, and the magnet unit 239 is 2 poles.
  • the number of poles and the number of coils of the brushed motor vary depending on the application, such as 2: 3, 4:10, 4:21.
  • a commutator 241 is fixed to the rotation shaft 233, and a plurality of brushes 242 are disposed radially outside thereof.
  • the commutator 241 is electrically connected to the rotor winding 236 via the lead wire 243 embedded in the rotating shaft 233.
  • the inflow and outflow of DC current to and from the rotor winding 236 are performed through the commutator 241, the brush 242, and the lead wire 243.
  • the commutator 241 is appropriately divided in the circumferential direction according to the number of phases of the rotor winding 236.
  • the brush 242 may be connected as it is to a DC power supply such as a storage battery via an electrical wiring, or may be connected to a DC power supply via a terminal block or the like.
  • the rotating shaft 233 is provided with a resin washer 244 as a sealing material between the bearing 232 and the commutator 241.
  • the resin washer 244 prevents the oil that has leaked out from the bearing 232, which is an oil-impregnated bearing, from flowing out to the commutator 241 side.
  • each lead 82 may be configured to have a plurality of insulating coatings on the inside and the outside.
  • a plurality of conductive wires (wires) with an insulating coating may be bundled into one and covered with an outer layer coating to constitute the conductive wire 82.
  • the insulation coating of the strands constitutes the inner insulation coating
  • the outer coating constitutes the outer insulation coating.
  • the insulation ability of the outer insulation film among the plurality of insulation films in the conducting wire 82 be higher than that of the inner insulation film.
  • the thickness of the outer insulating film is made thicker than the thickness of the inner insulating film.
  • the thickness of the outer insulating film is 100 ⁇ m, and the thickness of the inner insulating film is 40 ⁇ m.
  • a material having a dielectric constant lower than that of the inner insulating film may be used as the outer insulating film. At least one of these may be applied.
  • a wire it is good for a wire to be comprised as an aggregate
  • the conducting wire 82 includes a plurality of (four in the drawing) strands 181, an outer layer coating 182 (outer insulating coating) made of resin, for example, surrounding the plurality of strands 181, and each element in the outer layer coating 182. And an intermediate layer 183 (intermediate insulating film) filled around the line 181.
  • the strands of wire 181 have a conductive portion 181a made of a copper material and a conductive film 181b (inner insulating film) made of an insulating material.
  • the outer layer coating 182 insulates the phases.
  • the intermediate layer 183 has a coefficient of linear expansion higher than that of the conductor film 181 b of the wire 181 and has a coefficient of linear expansion lower than that of the outer film 182. That is, in the conducting wire 82, the linear expansion coefficient is higher toward the outside.
  • the outer layer film 182 has a linear expansion coefficient higher than that of the conductor film 181b, but the intermediate layer 183 functions as a cushioning material by providing an intermediate layer 183 having an intermediate linear expansion coefficient therebetween. It is possible to prevent simultaneous cracking on the outer layer side and the inner layer side.
  • the conductive portion 181a and the conductor coating 181b are adhered to each other in the strand 181, and the conductor coating 181b and the intermediate layer 183, and the intermediate layer 183 and the outer layer coating 182 are adhered to each other. Then, the bonding strength is weaker toward the outside of the conducting wire 82. That is, the adhesive strength of the conductive portion 181 a and the conductive film 181 b is weaker than the adhesive strength of the conductive film 181 b and the intermediate layer 183 and the adhesive strength of the intermediate layer 183 and the outer film 182.
  • the adhesive strength of the conductor film 181 b and the intermediate layer 183 is weaker or equal.
  • size of the adhesive strength of each film can be grasped
  • the heat generation and temperature change of the rotary electric machine occur mainly as a copper loss generated from the conductive portion 181a of the wire 181 and an iron loss generated from the inside of the iron core.
  • the intermediate layer 183 there is no heat generation source.
  • the simultaneous cracking can be prevented by the adhesive force that the intermediate layer 183 can serve as a cushion for both. Therefore, suitable use is possible also when used in fields with high withstand voltage or large temperature change, such as vehicle applications.
  • the wire 181 may be, for example, an enameled wire, and in such a case, has a resin film layer (conductor film 181b) such as PA, PI, PAI or the like. Further, it is desirable that the outer layer film 182 outside the strands of wire 181 be made of the same PA, PI, PAI or the like and be thick. Thereby, the destruction of the film due to the difference in linear expansion coefficient can be suppressed.
  • the outer layer film 182 has a dielectric constant such as PPS, PEEK, fluorine, polycarbonate, silicon, epoxy, polyethylene naphthalate, LCP, etc., apart from those corresponding to the above-mentioned materials such as PA, PI, PAI, etc.
  • the adhesion strength between the two types of coatings (intermediate insulating coating and outer insulating coating) on the outside of the wire 181 and the enamel coating of the wire 181 is the adhesion strength between the copper wire and the enamel coating on the wire 181 It is desirable to be weaker than This suppresses the phenomenon that the enamel coating and the two types of coatings are destroyed at one time.
  • thermal stress or impact stress is applied first from the outer layer film 182.
  • the thermal stress and the impact stress can be reduced by providing a portion where the films are not adhered. That is, the insulation structure is achieved by providing a wire (enamel wire) and an air gap and arranging fluorine, polycarbonate, silicon, epoxy, polyethylene naphthalate, and LCP.
  • the outermost layer fixing which is generally the final step around the stator winding, responsible for mechanical strength, fixing, etc., to the lead wire 82 of the above configuration, and the formability of epoxy, PPS, PEEK, LCP, etc. It is preferable to use a resin having properties close to that of the enamel coating, such as dielectric constant and linear expansion coefficient.
  • the distance DM in the radial direction between the surface on the armature side in the radial direction of the magnet unit 42 and the axial center of the rotor may be 50 mm or more.
  • the distance DM may be 50 mm or more.
  • the rotary electric machines are a brushed motor, a cage type induction motor, a permanent magnet synchronous motor and a reluctance motor.
  • the magnetic field generated by the stator winding on the primary side is received by the iron core of the rotor on the secondary side, and the induction current is flowed intensively to the cage conductor to form a reaction magnetic field.
  • the principle is to generate torque. For this reason, it is not always a good idea to eliminate the iron core on both the stator side and the rotor side from the viewpoint of the small size and high efficiency of the device.
  • the reluctance motor is a motor that takes advantage of the reluctance change of the iron core, and in principle it is not desirable to eliminate the iron core.
  • IPMs that is, embedded magnet type rotors
  • IPMs In permanent magnet type synchronous motors, IPMs (that is, embedded magnet type rotors) have been mainstream in recent years, and particularly in large machines, they are often IPMs unless there is special circumstances.
  • the IPM has a characteristic having both a magnet torque and a reluctance torque, and is operated while the ratio of the torque is adjusted appropriately by the inverter control. For this reason, the IPM is a small motor with excellent controllability.
  • the torque of the rotor surface which generates the magnet torque and the reluctance torque is the distance DM in the radial direction between the surface on the armature side in the radial direction of the magnet unit and the shaft center of the rotor,
  • the radius of the stator core of a general inner rotor is drawn on the horizontal axis, it becomes as shown in FIG.
  • the magnet torque is determined by the magnetic field strength generated by the permanent magnet as shown in the following equation (eq1), while the reluctance torque is an inductance, in particular q, as shown in the following equation (eq2).
  • the magnitude of the axial inductance determines its potential.
  • Magnet torque k ⁇ ⁇ ⁇ Iq ⁇ (eq 1)
  • Reluctance torque k ⁇ (Lq ⁇ Ld) ⁇ Iq ⁇ Id ⁇ (eq 2)
  • the inductance Lq of the winding is dependent on the core shape, the sensitivity is low, and rather, it is proportional to the square of the number of turns of the stator winding, so the number of turns is highly dependent.
  • ⁇ is the magnetic permeability of the magnetic circuit
  • N is the number of turns
  • S is the cross-sectional area of the magnetic circuit
  • ⁇ is the effective length of the magnetic circuit
  • the inductance L ⁇ ⁇ N ⁇ 2 ⁇ S / ⁇ . Since the number of turns of the winding depends on the size of the winding space, in the case of a cylindrical motor, it depends on the winding space of the stator, that is, the slot area. As shown in FIG. 44, the slot area is proportional to the product a ⁇ b of the length dimension a in the circumferential direction and the length dimension b in the radial direction because the shape of the slot is substantially square.
  • the circumferential length dimension of the slot is proportional to the diameter of the cylinder, as it increases as the diameter of the cylinder increases.
  • the radial dimension of the slot is proportional to the diameter of the cylinder. That is, the slot area is proportional to the square of the diameter of the cylinder.
  • the performance of the rotating electrical machine is determined by how large a current can flow, the performance being the slot area of the stator Dependent. From the above, if the length of the cylinder is constant, the reluctance torque is proportional to the square of the diameter of the cylinder. Based on this, FIG. 43 is a diagram in which the relationship between the magnet torque and the reluctance torque and DM is plotted.
  • the magnet torque increases linearly with DM, and the reluctance torque increases quadratically with DM. It can be seen that the magnet torque is dominant when DM is relatively small, and the reluctance torque is dominant as the stator core radius increases.
  • the longitudinal cross-sectional shape of the rotating shaft is fan-shaped per magnetic pole, and the width of the magnetic path narrows toward the device inner circumferential side, and the inner circumferential dimension of the teeth forming the slot is the performance of the rotating electrical machine Determine the limit.
  • the performance of the permanent magnets can not be fully utilized.
  • the inner diameter is designed to be large, and as a result, the size of the device is increased.
  • the distance DM in the radial direction between the surface on the armature side in the radial direction of the magnet unit and the shaft center of the rotor is 50 mm or more It may be
  • the linear portion 83 of the conducting wire 82 may be provided in a single layer in the radial direction. Moreover, when arranging the linear part 83 in multiple layers inside and outside in the radial direction, the number of layers may be arbitrary, and three layers, four layers, five layers, six layers or the like may be provided.
  • the rotary shaft 11 is provided so as to protrude in both the one end side and the other end side of the rotary electric machine 10 in the axial direction. It is also good.
  • the rotary shaft 11 may be provided so as to extend axially outward with a portion cantilevered by the bearing unit 20 as an end.
  • the internal space of the inverter unit 60 specifically, the internal space of the cylindrical portion 71 can be used more widely.
  • non-conductive grease is used in the bearings 21 and 22.
  • this may be changed to use conductive grease in the bearings 21 and 22.
  • a conductive grease containing metal particles, carbon particles and the like is used.
  • bearings may be provided at two positions on one end side and the other end side of the inverter unit 60.
  • the middle portion 45 of the magnet holder 41 has the inner shoulder 49a and the outer shoulder 49b of emotion, but these shoulders 49a and 49b are eliminated and the flat It may be configured to have the
  • the conductor 82a is configured as an assembly of a plurality of strands 86 in the conducting wire 82 of the stator winding 51, but this is changed to use a rectangular conducting wire having a rectangular cross section as the conducting wire 82 It is good also as composition. Further, as the conducting wire 82, a round conducting wire having a circular cross section or an elliptical cross section may be used.
  • the inverter unit 60 is provided inside the stator 50 in the radial direction, but instead of this, the inverter unit 60 may not be provided inside the stator 50 in the radial direction. . In this case, it is possible to use an inner area which is radially inward of the stator 50 as a space. Moreover, it is possible to arrange components different from the inverter unit 60 in the internal area.
  • the housing 30 may not be provided.
  • the rotor 40, the stator 50, and the like may be held at parts of the wheel and other vehicle components.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

L'invention concerne une machine électrique tournante (10) comprenant : une unité de génération de champ magnétique (40) comportant un électro-aimant cylindrique (42) doté d'une pluralité de pôles magnétiques comprenant des pôles N et des pôles S, les pôles N et les pôles S étant disposés en alternance dans la direction circonférentielle ; un induit (50) comportant un enroulement d'induit multiphase (51) ; et un rotor constitué de l'unité de génération de champ magnétique ou de l'induit. L'électro-aimant comprend une première partie (250) et une seconde partie (260), et la première partie est plus proche de l'axe d d'un système de coordonnées d'axes dq que la seconde partie et la seconde partie est plus proche de l'axe q du système de coordonnées d'axes dq que la première partie. L'électro-aimant est magnétiquement orienté de façon à satisfaire une condition telle qu'une condition dans laquelle un angle (θ11) formé par un axe de magnétisation facile de la première partie et par l'axe d est inférieur à un angle (θ12) formé par un axe de magnétisation facile (310) de la seconde partie et par l'axe q. L'unité de génération de champ magnétique est conçue de sorte qu'une force coercitive intrinsèque soit de 400 kA/m et qu'une densité de flux magnétique résiduel soit supérieure ou égale à 1,0 T.
PCT/JP2018/027409 2017-07-13 2018-07-20 Machine électrique tournante WO2019017496A1 (fr)

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DE112018003744.4T DE112018003744T5 (de) 2017-07-21 2018-07-20 Rotierende elektrische Maschine
CN201880048681.5A CN110945755B (zh) 2017-07-21 2018-07-20 旋转电机
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Cited By (8)

* Cited by examiner, † Cited by third party
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WO2020162232A1 (fr) * 2019-02-05 2020-08-13 株式会社デンソー Moteur rotatif
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