WO2024004382A1 - Moteur - Google Patents

Moteur Download PDF

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Publication number
WO2024004382A1
WO2024004382A1 PCT/JP2023/017356 JP2023017356W WO2024004382A1 WO 2024004382 A1 WO2024004382 A1 WO 2024004382A1 JP 2023017356 W JP2023017356 W JP 2023017356W WO 2024004382 A1 WO2024004382 A1 WO 2024004382A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
frame
motor
core member
insulator
Prior art date
Application number
PCT/JP2023/017356
Other languages
English (en)
Japanese (ja)
Inventor
貴央 大畑
宜農 麻生
幸寛 小林
俊幸 玉村
Original Assignee
パナソニックＩｐマネジメント株式会社
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
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2024004382A1 publication Critical patent/WO2024004382A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • 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

  • the present disclosure relates to a motor.
  • motors that include a stator core that is fixed to a core holder by shrink fitting (for example, Patent Document 1).
  • the core holder is expanded by heating, the stator core is inserted into the expanded core holder, and then the stator core is fixed by the contracting core holder.
  • the motor includes a stator having a plurality of split cores each including a core member and an insulator and connected in an annular manner, and an annular frame into which the stator is inserted by shrink fitting or press fitting.
  • the stator includes at least one first portion having a hardness lower than the hardness of the frame, and the distance (R1) from the outermost circumference of the first portion to the axis of the stator is equal to the distance (R1) of the core member.
  • the distance from the outermost circumference to the axis of the stator is greater than or equal to (R2), and the first portion is disposed at least in front of the core member in the insertion direction of the stator into the frame.
  • FIG. 1 is a perspective view showing a motor of Embodiment 1.
  • FIG. 2 is a perspective view showing a split core included in the motor of Embodiment 1.
  • FIG. 2 is a sectional view taken along line III-III in FIG. 1, showing an intermediate stage of inserting the stator into the frame in Embodiment 1.
  • FIG. 4 is a cross-sectional view showing an enlarged main part of FIG. 3;
  • FIG. 3 is a perspective view showing a motor according to a second embodiment.
  • FIG. 7 is a perspective view showing a split core included in the motor of Embodiment 2.
  • FIG. 6 is a cross-sectional view taken along the line VII-VII in FIG.
  • FIG. 7 is a perspective view showing a motor of Embodiment 3.
  • FIG. 7 is a perspective view showing a split core of Embodiment 3 (and Embodiment 4).
  • 9 is a cross-sectional view taken along the line XX in FIG. 8, showing an enlarged view of the main part in the middle of inserting the stator into the frame in Embodiment 3.
  • FIG. 7 is a perspective view showing a motor of Embodiment 4.
  • 12 is a cross-sectional view taken along the line XII-XII in FIG. 11, showing an enlarged view of a main part in the middle of inserting the stator into the frame in Embodiment 4.
  • FIG. FIG. 1 is a cross-sectional view schematically showing a motor according to the present disclosure.
  • the motor according to the present disclosure is, for example, an inner rotor type three-phase synchronous motor, but is not limited to this.
  • the motor includes a stator and a frame.
  • the motor may further include a rotor.
  • the present disclosure also treats a motor structure including a stator and a frame to which a rotor is not attached as a motor, and includes such a structure.
  • the stator has a plurality of split cores connected in an annular manner.
  • Each divided core includes a core member and an insulator.
  • the plurality of split cores may not be welded to each other.
  • the plurality of split cores may be connected to each other by engaging the male and female parts of each split core.
  • the core member may be made of a magnetic material (for example, a laminated steel plate or a dust core).
  • the insulator may be made of an insulating material.
  • the insulating material may be a general-purpose resin such as polyethylene terephthalate (PET) or an insulating resin such as engineering plastic.
  • a coil may be wound around the core member via an insulator.
  • the number of divided cores that the stator has can be set arbitrarily, and may be twelve, for example.
  • the frame has an annular (or cylindrical) shape, and the stator is inserted by shrink fitting or press fitting.
  • the frame may be constructed of metal material.
  • the frame may be constructed of a metallic material (eg, aluminum or an aluminum alloy) having a hardness lower than that of the core member.
  • hardness refers to Brinell hardness, which can be measured by a method according to JIS Z 2243.
  • the stator includes at least one first portion having a hardness lower than that of the frame.
  • the distance R1 from the outermost circumference of the first portion to the axis of the stator is greater than or equal to the distance R2 from the outermost circumference of the core member to the axis of the stator (R1 ⁇ R2).
  • the distance R1 may be equal to the distance R2 or may be larger than the distance R2.
  • the outermost periphery of the first portion is not located closer to the inner periphery than the outermost periphery of the core member.
  • the first portion is disposed at least in front of the core member in the insertion direction of the stator into the frame.
  • the first portion may or may not be located behind the core member in the insertion direction.
  • the outermost peripheral portion (or the front corner in the insertion direction) of the core member is prevented from coming into contact with the frame. This is because when inserting the stator into the frame, the outermost periphery of the first part may come into contact with the frame before the core member, but the outermost periphery of the core member is hidden behind the first part in the insertion direction. This is to become.
  • the outermost periphery of the first part inserted before the core member limits the radial displacement of the stator so that the outermost periphery of the core member does not come into contact with the frame. It's for a reason.
  • the first portion can be said to be a portion that prevents the core member from coming into contact with the frame when the stator is inserted into the frame.
  • the first portion may be integrally formed with the insulator. According to this configuration, the motor according to the present disclosure can be realized simply by changing the design of the insulator.
  • the stator may further include an insulating cap provided between the insulator and the frame.
  • the first portion may be integrally formed with the insulating cap.
  • the insulating cap may electrically insulate the coil wound around the insulator from the frame.
  • the insulating cap may be constructed of an insulating material (eg, PET).
  • the stator may further include a ring placed on the outer peripheral side of the insulator.
  • the first portion may be integrally formed with the ring.
  • the ring may be constructed of an insulating material (eg, PET). According to this configuration, by adding such a ring, it is possible to suppress the generation of foreign matter during manufacturing without changing the basic design of the motor.
  • a plurality of first parts may be provided intermittently in the circumferential direction of the stator.
  • a plurality (for example, two) of the first parts may be provided for each divided core.
  • the plurality of first parts function as guides to prevent the corners of the core member from coming into contact with the frame, but after insertion, the plurality of first parts act as guides to prevent the corners of the core member from coming into contact with the frame. easily collapses radially inward. Therefore, in the completed motor, the outermost peripheral part of the first part is unlikely to protrude radially outwardly more than the outermost peripheral part of the core member, and it is possible to avoid a decrease in dimensional accuracy due to the first part. Can be done. However, only one first portion may be provided continuously over the entire circumference of the stator.
  • the difference between distance R1 and distance R2 may be 0 mm or more and 0.1 mm or less. If the difference between both distances is 0 mm or more, contact between the corner of the core member and the frame is sufficiently suppressed by the first portion when the stator is inserted into the frame. If the difference between the two distances is 0.1 mm or less, the outermost periphery of the first part will collapse radially inward due to the pressing force from the frame after insertion, and the dimensional accuracy of the first part will decrease in the completed motor. can be fully avoided.
  • the frame is less likely to be scraped during shrink fitting or press fitting, so it is possible to suppress the generation of foreign matter during motor manufacturing. Furthermore, according to the present disclosure, by suppressing the generation of foreign matter, the accuracy of the inner diameter of the stator can be increased, and the cogging torque of the motor can be suppressed.
  • FIG. 1 is a perspective view showing a motor 10 according to the first embodiment.
  • FIG. 2 is a perspective view showing the split core 21 of the stator 20 included in the motor 10 of the first embodiment.
  • FIG. 3 is a diagram showing an intermediate stage of inserting the stator 20 into the frame 40 in the first embodiment, and is a sectional view taken along the line III-III in FIG. 1.
  • FIG. 4 is an enlarged cross-sectional view of the main part of FIG. 3.
  • FIG. 13 is a cross-sectional view schematically showing the motor 10 of the first embodiment. Note that in FIG. 1, the rotor 50 and frame 40 are omitted. As shown in FIGS. 1 to 4 and 13, the motor 10 includes a stator 20, a frame 40, and a rotor 50.
  • the stator 20 has a plurality of (12 in this example) split cores 21 that are connected in an annular manner.
  • Each divided core 21 includes a core member 22 and an insulator 25.
  • the core member 22 is made of laminated steel plates.
  • a first recess 23a is formed in the first outer surface 23 of the core member 22 (that is, the surface extending along the circumferential direction of the stator 20).
  • the core member 22 includes teeth portions 24 that face the rotor.
  • the insulator 25 is made of insulating resin.
  • the insulator 25 is provided so as to surround the teeth portion 24.
  • a coil 29 is wound around the teeth portion 24 via an insulator 25 using a concentrated winding method.
  • the stator 20 generates a rotating magnetic field for rotating the rotor when current flows through the coil 29.
  • the first outer surface 23 of the core member 22 is an example of the outermost peripheral portion of the core member.
  • the frame 40 has an annular shape, and the stator 20 is inserted therein by shrink fitting. However, the stator 20 may be inserted into the frame 40 by press fitting.
  • the frame 40 is made of aluminum alloy.
  • the stator 20 includes a plurality of (48 in this example) protrusions 26 that are integrally formed with the insulator 25. Although four protrusions 26 are provided in each divided core 21, the number and arrangement of the protrusions 26 are not limited to this.
  • the tip 26a of the protrusion 26 has a curved surface and a rounded shape, but the shape of the tip 26a can be changed arbitrarily.
  • the hardness of the convex portion 26 made of insulating resin is lower than the hardness of the frame 40 made of aluminum alloy.
  • Two protrusions 26 are provided on each side of the core member 22 in the axial direction of the stator 20 (or in the direction in which the stator 20 is inserted into the frame 40).
  • the plurality of convex portions 26 are provided intermittently in the circumferential direction of the stator 20.
  • the angle between adjacent protrusions 26 in the circumferential direction of the stator 20 (that is, the angle formed by two straight lines passing through the axis O of the stator 20 and the protruding ends 26a of the adjacent protrusions 26) is, for example, 10 The angle may be greater than or equal to 25 degrees.
  • the convex portion 26 is an example of the first portion.
  • the tip 26a of the convex portion 26 is an example of the outermost peripheral portion of the first portion.
  • the distance R1 from the tip 26a of the convex portion 26 to the axis O of the stator 20 (that is, the radius R1 of a circle centered on this axis O and circumscribed to the tip 26a of the convex portion 26) is the outermost circumference of the core member 22.
  • the distance R2 from the center to the axis O of the stator 20 (that is, the radius R2 of a circle centered on the axis O and circumscribed to the first outer surface 23 of the core member 22) (R1 ⁇ R2).
  • the difference between distance R1 and distance R2 is 0 mm or more and 0.1 mm or less. According to such a convex portion 26, as shown in FIGS.
  • Embodiment 2 of the present disclosure will be described.
  • the motor 10 of this embodiment differs from the first embodiment in the configuration of the insulator 25.
  • differences from the first embodiment described above will be mainly explained.
  • FIG. 5 is a perspective view showing the motor 10 of the second embodiment.
  • FIG. 6 is a perspective view showing the split core 21 of the stator 20 included in the motor 10 of the second embodiment.
  • FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. 5, showing an enlarged view of the main part in the middle of inserting the stator 20 into the frame in the second embodiment.
  • the outline of the motor 10 of the second embodiment is the same as that of the motor 10 of the first embodiment, and the cross-sectional view thereof is the same as the cross-sectional view shown in FIG. 13.
  • the rotor 50 and frame 40 are omitted in FIG.
  • the insulator 25 has a second outer surface 27 located radially outward than the first outer surface 23 of the core member 22 (that is, along the circumferential direction of the stator 20). It has an extending surface). A second recess 27a is formed in the second outer surface 27 in line with the first recess 23a in the axial direction of the stator 20.
  • the second outer surface 27 and its vicinity of the insulator 25 are an example of the first portion.
  • the second outer surface 27 of the insulator 25 is an example of the outermost peripheral portion of the first portion.
  • the distance R1 from the second outer surface 27 of the insulator 25 to the axis O of the stator 20 is the outermost portion of the core member 22. to the axis O of the stator 20 (that is, the radius R2 of a circle centered on the axis O and circumscribed to the first outer surface 23 of the core member 22).
  • Embodiment 3 of the present disclosure will be described.
  • the motor 10 of this embodiment differs from the first embodiment in that the stator 20 includes an insulating cap 31.
  • the stator 20 includes an insulating cap 31.
  • FIG. 8 is a perspective view showing the motor 10 of the third embodiment.
  • FIG. 9 is a perspective view showing the split core 21 of the stator 20 included in the motor 10 of the third embodiment.
  • FIG. 10 is a cross-sectional view taken along the line XX in FIG. 8, showing an enlarged main part of the stator 20 in the middle of inserting the stator 20 into the frame 40 in the third embodiment.
  • the outline of the motor 10 of Embodiment 3 is the same as that of the motor 10 of Embodiment 1, and its sectional view is the same as the sectional view shown in FIG. 13.
  • the rotor 50 and frame 40 are omitted in FIG.
  • the insulator 25 has a third outer surface 28 located radially inward than the first outer surface 23 of the core member 22 (that is, along the circumferential direction of the stator 20). It has an extending surface). A third recess 28a is formed in the third outer surface 28 in line with the first recess 23a in the axial direction of the stator 20.
  • the stator 20 of this embodiment includes an insulating cap 31 disposed between the insulator 25 and the frame 40.
  • the insulating cap 31 is made of insulating resin.
  • the insulating cap 31 includes an outer peripheral part 32 that extends over the entire circumference of the stator 20 and covers the insulator 25 (or the coil 29) from the outer peripheral side, and an outer peripheral part 32 that extends radially inward from the outer peripheral part 32 and covers the insulator 25 (or the coil 29). It has an extending portion 34 that covers from one axial side (that is, the side where the coil 29 is exposed in the axial direction of the stator 20).
  • the outer peripheral portion 32 of the insulating cap 31 is attached to the third outer surface 28 of the insulator 25 so as to surround it.
  • the outer peripheral portion 32 has a fourth outer surface 33 (that is, a surface extending along the circumferential direction of the stator 20 ) located radially outward than the first outer surface 23 of the core member 22 .
  • the fourth outer surface 33 of this embodiment extends over the entire circumference, the fourth outer surface 33 is not limited thereto.
  • the outer peripheral portion 32 may be shaped like a spur gear, and the plurality of fourth outer surfaces 33 may be arranged intermittently in the circumferential direction of the stator 20.
  • the fourth outer surface 33 and its vicinity of the insulating cap 31 are an example of the first portion.
  • the fourth outer surface 33 of the insulating cap 31 is an example of the outermost peripheral portion of the first portion.
  • the distance R1 from the fourth outer surface 33 of the insulating cap 31 to the axis O of the stator 20 is the outermost periphery of the core member 22.
  • the distance R2 from the center to the axis O of the stator 20 (that is, the radius R2 of a circle centered on the axis O and circumscribed to the first outer surface 23 of the core member 22).
  • Embodiment 4 of the present disclosure will be described.
  • the motor 10 of this embodiment differs from the third embodiment in that the stator 20 includes a ring 35.
  • differences from the third embodiment described above will be mainly explained.
  • FIG. 11 is a perspective view showing the motor 10 of Embodiment 4.
  • FIG. 12 is a cross-sectional view taken along the line XII-XII in FIG. 11, showing an enlarged view of the main part at a stage in the middle of inserting the stator 20 into the frame 40 in the fourth embodiment.
  • the divided core 21 of the fourth embodiment is similar to the divided core 21 of the third embodiment, which is shown in FIG.
  • the outline of the motor 10 of Embodiment 4 is the same as that of the motor 10 of Embodiment 1, and its cross-sectional view is the same as the cross-sectional view shown in FIG. 13.
  • the rotor 50 and frame 40 are omitted in FIG. 11.
  • the stator 20 of this embodiment includes a ring 35 disposed on the outer peripheral side of the insulator 25.
  • the ring 35 is made of insulating resin.
  • the ring 35 is attached to the third outer surface 28 of the insulator 25 so as to surround it.
  • the ring 35 has a fifth outer surface 36 (that is, a surface extending along the circumferential direction of the stator 20 ) located radially outward than the first outer surface 23 of the core member 22 .
  • the fifth outer surface 36 of this embodiment extends over the entire circumference, the fifth outer surface 36 is not limited thereto.
  • the ring 35 may be shaped like a spur gear, and the plurality of fifth outer surfaces 36 may be arranged intermittently in the circumferential direction of the stator 20.
  • the fifth outer surface 36 and its vicinity of the ring 35 are an example of the first portion.
  • the fifth outer surface 36 of the ring 35 is an example of the outermost peripheral portion of the first portion.
  • the distance R1 from the fifth outer surface 36 of the ring 35 to the axis O of the stator 20 is the outermost circumference of the core member 22.
  • the axis O of the stator 20 that is, the radius R2 of a circle centered on the axis O and circumscribing the first outer surface 23 of the core member 22.
  • the present disclosure can be used for motors.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

La présente invention supprime la génération de matière étrangère pendant la fabrication d'un moteur. Ce moteur (10) comprend : un stator (20) ayant une pluralité de noyaux divisés (21) qui comprennent chacun un élément de noyau (22) et un isolant (25) et qui sont également accouplés de manière annulaire ; et un cadre annulaire (40) dans lequel le stator (20) est inséré au moyen d'un ajustement par frettage ou par pression. Le stator (20) est équipé d'au moins un premier site (26) ayant une rigidité inférieure à celle du cadre (40). Une distance (R1) entre la partie périphérique externe (26a) du premier site (26) et le centre axial du stator (20) est supérieure ou égale à une distance (R2) entre la partie périphérique externe (23) de chaque élément central (22) et le centre axial du stator (20). Le premier site (26) est disposé en avant d'au moins les éléments du noyau (22) dans la direction dans laquelle le stator (20) est inséré dans le cadre (40).
PCT/JP2023/017356 2022-06-28 2023-05-09 Moteur WO2024004382A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022103978 2022-06-28
JP2022-103978 2022-06-28

Publications (1)

Publication Number Publication Date
WO2024004382A1 true WO2024004382A1 (fr) 2024-01-04

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ID=89381910

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/017356 WO2024004382A1 (fr) 2022-06-28 2023-05-09 Moteur

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WO (1) WO2024004382A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59127563A (ja) * 1983-01-10 1984-07-23 Hitachi Ltd 外側ボビン付円筒状超電導コイルの製作方法
JP2015503312A (ja) * 2011-10-24 2015-01-29 エルジー エレクトロニクス インコーポレイティド 洗濯機
JP2015097450A (ja) * 2013-11-15 2015-05-21 アイシン精機株式会社 回転電機
JP2018074685A (ja) * 2016-10-26 2018-05-10 マブチモーター株式会社 ブラシレスモータ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59127563A (ja) * 1983-01-10 1984-07-23 Hitachi Ltd 外側ボビン付円筒状超電導コイルの製作方法
JP2015503312A (ja) * 2011-10-24 2015-01-29 エルジー エレクトロニクス インコーポレイティド 洗濯機
JP2015097450A (ja) * 2013-11-15 2015-05-21 アイシン精機株式会社 回転電機
JP2018074685A (ja) * 2016-10-26 2018-05-10 マブチモーター株式会社 ブラシレスモータ

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