WO2019102580A1 - Permanent magnet rotating electric machine - Google Patents

Permanent magnet rotating electric machine Download PDF

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Publication number
WO2019102580A1
WO2019102580A1 PCT/JP2017/042197 JP2017042197W WO2019102580A1 WO 2019102580 A1 WO2019102580 A1 WO 2019102580A1 JP 2017042197 W JP2017042197 W JP 2017042197W WO 2019102580 A1 WO2019102580 A1 WO 2019102580A1
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WO
WIPO (PCT)
Prior art keywords
permanent magnet
rotor
dimension
magnetic
pair
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Application number
PCT/JP2017/042197
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French (fr)
Japanese (ja)
Inventor
宇宙 満田
義浩 深山
中村　成志
井上　正哉
Original Assignee
三菱電機株式会社
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.)
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Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2017/042197 priority Critical patent/WO2019102580A1/en
Priority to CN201780096969.5A priority patent/CN111357171B/en
Priority to JP2019556046A priority patent/JP7050808B2/en
Publication of WO2019102580A1 publication Critical patent/WO2019102580A1/en

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    • 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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures

Definitions

  • the present invention relates to a permanent magnet type rotating electric machine in which permanent magnets are embedded in a rotor core.
  • a permanent magnet type rotary electric machine including a stator and a rotor provided radially inward of the stator.
  • the rotor has a rotor core in which a pair of magnet insertion holes are formed in an outer peripheral portion, and a pair of permanent magnets inserted in each of the pair of magnet insertion holes.
  • the pair of permanent magnets are arranged in a V-shape so as to be apart from each other as it goes radially outward.
  • a magnetic slit is formed in a portion between the pair of permanent magnets in the stator core. This reduces the d-axis inductance (see, for example, Patent Document 1).
  • the present invention has been made to solve the problems as described above, and an object thereof is to provide a permanent magnet type rotating electrical machine capable of increasing q-axis inductance.
  • a permanent magnet type rotary electric machine includes a rotor and a stator provided outside with respect to the rotor in a radial direction of the rotor, and the rotor has a pair of magnet insertion holes formed therein.
  • the magnetic saturation at the exit portion of the q-axis magnetic path can be prevented.
  • the q-axis inductance can be increased.
  • FIG. 16 is a diagram showing a magnetic flux passing through teeth in a comparative example for comparison with the permanent magnet type rotary electric machine according to the third embodiment. It is a top view which shows the principal part of the permanent-magnet-type rotary electric machine which concerns on Embodiment 4 of this invention. It is an enlarged view which shows the D section of FIG.
  • FIG. 21 is a diagram showing a magnetic flux passing through teeth in a comparative example for comparison with the permanent magnet type rotary electric machine according to the fourth embodiment. It is a top view which shows the principal part of the permanent-magnet-type rotary electric machine which concerns on Embodiment 5 of this invention. It is a figure which shows the flow of the magnetic flux in the permanent-magnet-type rotary electric machine of FIG. FIG.
  • FIG. 21 is a diagram showing the flow of magnetic flux in a comparative example for comparison with the permanent magnet type rotary electric machine according to Embodiment 5. It is a top view which shows the principal part of the permanent-magnet-type rotary electric machine which concerns on Embodiment 6 of this invention.
  • FIG. 1 is a plan view showing a permanent magnet type rotary electric machine according to Embodiment 1 of the present invention
  • FIG. 2 is an enlarged view showing a portion A of FIG.
  • the permanent magnet type rotary electric machine according to the first embodiment includes a stator 1 formed in an annular shape, and a rotor 2 provided opposite to the stator 1.
  • the stator 1 is provided outside the rotor 2 in the radial direction of the rotor 2.
  • the radial direction is the radial direction of the rotor 2
  • the circumferential direction is the circumferential direction of the rotor 2
  • the axial direction is the axial direction of the rotor 2.
  • the stator 1 includes a stator core 11 and a plurality of coils 12 provided on the stator core 11.
  • the stator core 11 has a core back 111 formed in an annular shape, and a plurality of teeth 112 projecting inward in the radial direction from the core back 111.
  • the plurality of teeth 112 are arranged at equal intervals in the circumferential direction.
  • a plurality of slots 113 are formed one by one between the teeth 112 adjacent in the circumferential direction.
  • the coil 12 is provided in the slot 113.
  • the rotor 2 includes a cylindrical rotor core 21 and a plurality of permanent magnets 22 embedded in the rotor core 21.
  • a plurality of pairs of magnet insertion holes 211 are formed in the rotor core 21 at equal intervals in the circumferential direction.
  • the pair of magnet insertion holes 211 When viewed in the axial direction, the pair of magnet insertion holes 211 are formed in a V shape so as to be away from each other as it goes outward in the radial direction.
  • One permanent magnet 22 is inserted into each of the pair of magnet insertion holes 211.
  • the pair of permanent magnets 22 inserted into the pair of magnet insertion holes 211 are arranged in a V shape so as to be away from each other as it goes outward in the radial direction when viewed in the axial direction.
  • a plurality of outer circumferential side magnetic slits 212 are formed in a portion of the rotor core 21 which is the outer side in the radial direction and between the pair of permanent magnets 22.
  • two outer circumferential magnetic slits 212 are formed.
  • One of the two outer circumferential magnetic slits 212 is taken as a first outer circumferential magnetic slit 212a, and the other is taken as a second outer circumferential magnetic slit 212b.
  • Each of the first outer circumferential magnetic slit 212a and the second outer circumferential magnetic slit 212b is formed in a U-shape.
  • Both ends of the first outer circumferential magnetic slit 212a and the second outer circumferential magnetic slit 212b are disposed radially outward, and an intermediate portion is disposed radially inwardly.
  • the second outer circumferential magnetic slit 212 b is disposed inside the first outer circumferential magnetic slit 212 a. Therefore, the first outer circumferential magnetic slit 212a is disposed closer to the permanent magnet 22 than the second outer circumferential magnetic slit 212b.
  • An inner circumferential magnetic slit 213 is formed in a portion between the pair of magnet insertion holes 211 in the stator core 11 and in the radially inner portion.
  • FIG. 3 is an enlarged view showing a portion B of FIG.
  • a portion of the magnet insertion hole 211 which is the outer side in the radial direction and in which the permanent magnet 22 is not inserted is referred to as a radial outer magnetic slit 211 a.
  • a portion which is an inner side in the radial direction in the magnet insertion hole 211 and in which the permanent magnet 22 is not inserted is referred to as a radial inner magnetic slit 211b.
  • the inner circumferential magnetic slits 213 are disposed between the radially inner magnetic slits 211 b in the pair of magnet insertion holes 211.
  • a portion of the rotor core 21 located between the radially inner magnetic slit 211 b and the inner magnetic slit 213 in each of the pair of magnet insertion holes 211 is referred to as an inner inter-magnet magnetic path 214.
  • the inner inter-magnet magnetic path 214 is a portion between the pair of permanent magnets 22 in the rotor core 21 and serves as a magnetic path on the inner side in the radial direction.
  • FIG. 3 shows a portion of the inter-magnet magnetic path 214 between the radially inner magnetic slit 211 b of the one magnet insertion hole 211 and the inner circumferential magnetic slit 213.
  • a portion of the rotor core 21 passing between the pair of permanent magnets 22 and extending in the radial direction is taken as a d-axis.
  • the d-axis is a portion where the magnetic flux in the rotor core 21 is difficult to pass.
  • a q-axis magnetic path is formed in a portion of the rotor core 21 between the permanent magnet 22 and the first outer magnetic slit 212a.
  • a radially outer portion of the q-axis magnetic path is taken as a q-axis magnetic path outlet portion 215.
  • the q-axis magnetic path is a portion through which the q-axis magnetic flux in the rotor core 21 passes.
  • the dimension in the width direction of the q-axis magnetic path outlet portion 215 is d 1 .
  • the residual magnetic flux density of the permanent magnet 22 is B mag .
  • the magnetic flux density when the magnetization of the rotor core 21 is saturated is assumed to be B s .
  • the rotor 2 is formed to satisfy d 1 > W 2 ⁇ B mag / B s ⁇ W 4 .
  • the total amount of magnetic flux of the permanent magnet 22 is expressed as W 2 ⁇ B mag .
  • the leakage flux between one radially inner magnetic slit 211 b and the inner circumferential magnetic slit 213 in the pair of radially inner magnetic slits 211 b is expressed as W 4 ⁇ B s . Therefore, the magnetic flux passing through the q-axis magnetic path exit portion 215 is expressed as W 2 ⁇ B mag ⁇ W 4 ⁇ B 2 . Accordingly, the magnetic flux density of the q-axis magnetic path exit portion 215 is expressed as (W 2 ⁇ B mag ⁇ W 4 ⁇ B 2 ) / d 1 .
  • the magnetic flux density (W 2 ⁇ B) of the q-axis magnetic path outlet portion 215 is more than the magnetic flux density B s when the magnetization of the rotor core 21 is saturated. It is sufficient to reduce mag -W 4 ⁇ B 2 ) / d 1 .
  • B mag is 1.15 (T) to 1.30 (T)
  • B s is 1.7 (T) to 1.9 (T).
  • B mag / B s > 0.60. Therefore, the rotor 2 is formed to satisfy d 1 > 0.6 ⁇ W 2 -W 4 .
  • d 1 > 0.6 ⁇ W 2 -W 4 is satisfied. This prevents magnetic saturation at the q-axis magnetic path exit portion 215. As a result, the q-axis inductance can be increased. Therefore, the reluctance torque of the permanent magnet type rotary electric machine can be increased.
  • a plurality of outer circumferential magnetic slits 212 are formed in a portion between the pair of permanent magnets 22 in the rotor core 21. As a result, it is possible to suppress the increase in magnetic resistance due to the outer circumferential magnetic slit 212 interrupting the armature magnetic flux, and to reduce the d-axis inductance. As a result, the salient pole ratio of the permanent magnet type rotary electric machine can be increased. Therefore, the reluctance torque of the permanent magnet type rotating electrical machine can be increased.
  • FIG. 4 is a plan view showing the main part of a permanent magnet type rotary electric machine according to Embodiment 2 of the present invention.
  • d 1 > d 2 the width dimension of the portion most widthwise dimension as small as d 2.
  • d 1 > d 2 .
  • the innermost portion in the radial direction of the closest part 22a closest to the first outer peripheral magnetic slit 212a in the permanent magnet 22 and the permanent magnet 22 the dimension between the 22b to W 3.
  • the rotor 2 is formed to satisfy d 2 > W 3 ⁇ B mag / B s ⁇ W 4 .
  • the rotor 2 is formed to satisfy d 2 > 0.6 ⁇ W 3 -W 4 .
  • the other configuration is the same as that of the first embodiment.
  • d 2 > W 3 ⁇ B mag / B s -W 4 is satisfied.
  • magnetic saturation of a portion of the rotor core 21 between the permanent magnet 22 and the first outer circumferential magnetic slit 212a is prevented.
  • the first outer magnetic slit 212a can be enlarged without reducing the q-axis inductance. Therefore, the d-axis inductance can be reduced without reducing the q-axis inductance.
  • the salient pole ratio of the permanent magnet type rotary electric machine can be increased.
  • Third Embodiment 5 is a plan view showing the main part of a permanent magnet type rotary electric machine according to Embodiment 3 of the present invention
  • FIG. 6 is an enlarged view showing a portion C of FIG.
  • the widthwise dimension of the portion widest dimension is smaller in the teeth 112 and d 3.
  • a permanent magnet type rotary electric machine is formed to satisfy d 3 > W 5 .
  • the other configuration is the same as that of the first embodiment or the second embodiment.
  • FIG. 7 is a view showing a magnetic flux passing through the teeth 112 of FIG. 5, and FIG. 8 is a view showing a magnetic flux passing through the teeth 112 in a comparative example for comparison with the permanent magnet type rotating electric machine according to the third embodiment.
  • the first outer magnetic slit 212 a is formed to satisfy d 3 > W 5
  • a portion adjacent to the q-axis magnetic path outlet portion 215 in the first outer magnetic slit 212 a in the circumferential direction is the tooth 112
  • the magnetic flux ⁇ passing through the teeth 112 passes through the q-axis magnetic path even when facing the This prevents the magnetic flux ⁇ passing through the teeth 112 from being hindered by the first outer circumferential magnetic slit 212a.
  • the decrease in torque of the permanent magnet type rotary electric machine is reduced.
  • the first outer magnetic slit 212c is formed to satisfy d 3 ⁇ W 5 , a portion adjacent to the q-axis magnetic path outlet portion 215 in the first outer magnetic slit 212c in the circumferential direction is When facing the teeth 112, the magnetic flux ⁇ passing through the teeth 112 does not pass through the q-axis magnetic path. Thereby, the magnetic flux ⁇ ⁇ ⁇ passing through the teeth 112 is blocked by the first outer circumferential magnetic slit 212a. As a result, the reluctance of the q-axis magnetic path increases. Therefore, the torque of the permanent magnet type rotary electric machine is reduced.
  • Embodiment 9 is a plan view showing an essential part of a permanent magnet type rotary electric machine according to Embodiment 4 of the present invention
  • FIG. 10 is an enlarged view showing a portion D of FIG.
  • the dimension in the width direction of the q-axis magnetic path outlet portion 215 is d 1 .
  • the widthwise dimension of the portion widest dimension is smaller in the teeth 112 and d 3.
  • a permanent magnet type rotary electric machine is formed to satisfy d 3 ⁇ d 1 .
  • the other configuration is the same as any one of the first to third embodiments.
  • FIG. 11 is a diagram showing a magnetic flux passing through the teeth 112 in a comparative example for comparison with the permanent magnet type rotary electric machine according to the fourth embodiment.
  • the permanent magnet type rotary electric machine is formed to satisfy d 3 dd 2 , magnetic saturation occurs in the q-axis magnetic path exit portion 215 due to the armature magnetic flux ⁇ A and the magnet magnetic flux ⁇ M. Thereby, the magnetic resistance in the rotor core 21 is increased.
  • d 3 ⁇ d 1 is satisfied.
  • the magnetic saturation in the q-axis magnetic path exit portion 215 due to the armature magnetic flux ⁇ A and the magnet magnetic flux ⁇ M can be suppressed.
  • the increase in the magnetic reluctance of the rotor core 21 can be suppressed.
  • FIG. 12 is a plan view showing the main part of a permanent magnet type rotary electric machine according to Embodiment 5 of the present invention.
  • the widthwise dimension of the minimum width portion 114 is widest dimension is smaller in the teeth 112 and d 3.
  • a permanent magnet type rotary electric machine is formed so as to satisfy d 1 + W 5 ⁇ d 3 + W 6 .
  • the other configuration is the same as any one of the first to fourth embodiments.
  • FIG. 13 is a diagram showing the flow of magnetic flux in the permanent magnet type rotary electric machine of FIG.
  • a permanent magnet type rotary electric machine is formed to satisfy d 1 + W 5 ⁇ d 3 + W 6
  • the armature magnetic flux ⁇ A is applied to both of the first outer magnetic slits 212 a in the circumferential direction of the rotor core 21. It can pass through adjacent parts. Thereby, the fall of the magnetic resistance in rotor iron core 21 is controlled. As a result, the reduction in reluctance torque of the permanent magnet type rotary electric machine is suppressed.
  • FIG. 14 is a diagram showing the flow of magnetic flux in a comparative example for comparison with the permanent magnet type rotary electric machine according to the fifth embodiment.
  • a permanent magnet type rotary electric machine is formed so as to satisfy d 1 + W 5 > d 3 + W 6 .
  • the armature magnetic flux ⁇ A is generated by the first outer magnetic slit 212 a and the second outer magnetic magnet 212 in the rotor core 21. It can not pass between the slit 212b. Further, in this case, the armature magnetic flux ⁇ A passes between the first outer magnetic slit 212 a in the rotor core 21 and the permanent magnet 22.
  • the armature magnetic flux ⁇ A can pass only to a portion adjacent to one of the first outer magnetic slits 212 a in the circumferential direction of the rotor core 21.
  • the magnetic resistance in the rotor core 21 is reduced.
  • the reluctance of the rotor core 21 decreases according to the rotation angle of the rotor 2. Therefore, the reluctance torque of the permanent magnet type rotary electric machine is reduced.
  • d 1 + W 5 ⁇ d 3 + W 6 is satisfied.
  • the reduction of the magnetic resistance in the rotor core 21 can be suppressed.
  • FIG. 15 is a plan view showing an essential part of a permanent magnet type rotary electric machine according to Embodiment 6 of the present invention.
  • a groove 216 is formed on the outer peripheral surface of the rotor core 21 at a portion adjacent to the outer peripheral magnetic slit 212 in the radial direction. The formation of the grooves 216 in the rotor core 21 reduces the weight of the rotor core 21.
  • the widthwise dimension of the minimum width portion 114 is widest dimension is smaller in the teeth 112 and d 3.
  • the outer peripheral side magnetic slit 212 that are within the circumferential direction about ⁇ d 3/2 around the d-axis, d 3> W 5 need not meet.
  • the other configuration is the same as any one of the first to fifth embodiments.
  • a magnetic path outer peripheral side magnetic slit 212 is within the range of ⁇ d 3/2 in the circumferential direction about the d-axis is formed, it is small to contribute to the reluctance torque of the permanent magnet type rotating electrical machine. Therefore, even if larger than the width dimension d 3 of the smallest width portion 114 of the width dimension W 5 parts adjacent in the circumferential direction with respect to the q-axis magnetic path outlet portion 215 at the outer peripheral side magnetic slit 212 teeth 112 The influence on the reluctance torque of the permanent magnet type rotary electric machine is small.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

The present invention obtains a permanent magnet rotating electric machine in which the q-axis inductance can be increased. When the width direction dimension of a q-axis magnetic path exit portion that is the outside portion of a q-axis magnetic path in the radial direction is denoted by d1, the dimension of a permanent magnet in a direction vertical to the magnetization direction of the permanent magnet when viewed in a shaft direction is denoted by W2, and a half of the width direction dimension of an inside inter-magnet magnetic path that is a part of the rotor core between a pair of permanent magnets and the magnetic path of an inside portion in the radial direction is denoted by W4, the permanent magnet rotating electric machine satisfies the relationship of d1 > 0.6 × W2 − W4.

Description

永久磁石式回転電機Permanent magnet type rotating electric machine
　この発明は、永久磁石が回転子鉄心に埋め込まれた永久磁石式回転電機に関する。 The present invention relates to a permanent magnet type rotating electric machine in which permanent magnets are embedded in a rotor core.
　従来、固定子と、径方向について固定子よりも内側に設けられた回転子とを備えた永久磁石式回転電機が知られている。回転子は、外周部に一対の磁石挿入孔が形成された回転子鉄心と、一対の磁石挿入孔のそれぞれに挿入された一対の永久磁石とを有している。一対の永久磁石は、径方向について外側に向かうにつれて互いに離れるようにＶ字形状に配置されている。固定子鉄心における一対の永久磁石の間の部分には、磁気スリットが形成されている。これにより、ｄ軸インダクタンスが減少する（例えば、特許文献１参照）。 BACKGROUND Conventionally, there is known a permanent magnet type rotary electric machine including a stator and a rotor provided radially inward of the stator. The rotor has a rotor core in which a pair of magnet insertion holes are formed in an outer peripheral portion, and a pair of permanent magnets inserted in each of the pair of magnet insertion holes. The pair of permanent magnets are arranged in a V-shape so as to be apart from each other as it goes radially outward. A magnetic slit is formed in a portion between the pair of permanent magnets in the stator core. This reduces the d-axis inductance (see, for example, Patent Document 1).
特開２００４－１０４９６２号公報Japanese Patent Laid-Open No. 2004-104962
　しかしながら、回転子鉄心における永久磁石と磁気スリットとの間の部分に磁気飽和が生じることによって、ｑ軸インダクタンスが減少する。その結果、永久磁石式回転電機のトルクが減少するという課題があった。 However, q-axis inductance is reduced by magnetic saturation occurring in the portion between the permanent magnet and the magnetic slit in the rotor core. As a result, there is a problem that the torque of the permanent magnet type rotary electric machine decreases.
　この発明は、上述のような課題を解決するためになされたものであり、その目的は、ｑ軸インダクタンスを増加させることができる永久磁石式回転電機を提供するものである。 The present invention has been made to solve the problems as described above, and an object thereof is to provide a permanent magnet type rotating electrical machine capable of increasing q-axis inductance.
　この発明に係る永久磁石式回転電機は、回転子と、回転子の径方向について回転子に対して外側に設けられた固定子とを備え、回転子は、一対の磁石挿入孔が形成された回転子鉄心と、一対の磁石挿入孔のそれぞれに挿入された一対の永久磁石とを有し、一対の永久磁石は、回転子の軸方向に視た場合に径方向について外側に向かうにつれて互いに離れるＶ字形状に配置され、回転子鉄心における径方向について外側の部分であって一対の永久磁石の間の部分には、外周側磁気スリットが形成され、回転子鉄心における永久磁石と外周側磁気スリットとの間の部分には、ｑ軸磁路が形成され、ｑ軸磁路における径方向について外側の部分であるｑ軸磁路出口部分の幅方向寸法をｄ1とし、軸方向に視た場合の永久磁石の磁化方向に対する垂直方向についての永久磁石の寸法をＷ2とし、回転子鉄心における一対の永久磁石の間の部分であって径方向について内側の部分の磁路である内側磁石間磁路の幅方向寸法の半分の寸法をＷ4とした場合に、ｄ1＞０．６×Ｗ2－Ｗ4を満たす。 A permanent magnet type rotary electric machine according to the present invention includes a rotor and a stator provided outside with respect to the rotor in a radial direction of the rotor, and the rotor has a pair of magnet insertion holes formed therein. It has a rotor core and a pair of permanent magnets inserted in each of a pair of magnet insertion holes, and a pair of permanent magnets separate from each other as it goes radially outward when viewed in the axial direction of the rotor An outer circumferential magnetic slit is formed in a V-shaped portion, which is a radially outer portion of the rotor core and between the pair of permanent magnets, and the permanent magnet and the outer circumferential magnetic slit in the rotor core Q axis magnetic path is formed in the part between and the width direction dimension of the q axis magnetic path outlet part which is an outer part about the radial direction in the q axis magnetic path is d 1 when viewed in the axial direction Perpendicular to the magnetization direction of the permanent magnet The dimensions of the permanent magnets for the countercurrent and W 2, a half of the width dimension between the inner magnet flux path is a magnetic path portions at a the radially inner of the portion between the pair of permanent magnets in the rotor core If the size was W 4, satisfy the d 1> 0.6 × W 2 -W 4.
　この発明に係る永久磁石式回転電機によれば、ｑ軸磁路出口部分における磁気飽和が防がれる。その結果、ｑ軸インダクタンスを増加させることができる。 According to the permanent magnet type rotating electrical machine according to the present invention, the magnetic saturation at the exit portion of the q-axis magnetic path can be prevented. As a result, the q-axis inductance can be increased.
この発明の実施の形態１に係る永久磁石式回転電機を示す平面図である。It is a top view which shows the permanent-magnet-type rotary electric machine which concerns on Embodiment 1 of this invention. 図１のＡ部を示す拡大図である。It is an enlarged view which shows the A section of FIG. 図２のＢ部を示す拡大図である。It is an enlarged view which shows the B section of FIG. この発明の実施の形態２に係る永久磁石式回転電機の要部を示す平面図である。It is a top view which shows the principal part of the permanent-magnet-type rotary electric machine which concerns on Embodiment 2 of this invention. この発明の実施の形態３に係る永久磁石式回転電機の要部を示す平面図である。It is a top view which shows the principal part of the permanent-magnet-type rotary electric machine which concerns on Embodiment 3 of this invention. 図５のＣ部を示す拡大図である。It is an enlarged view which shows the C section of FIG. 図５のティースを通る磁束を示す図である。It is a figure which shows the magnetic flux which passes through the teeth of FIG. 実施の形態３に係る永久磁石式回転電機と比較するための比較例におけるティースを通る磁束を示す図である。FIG. 16 is a diagram showing a magnetic flux passing through teeth in a comparative example for comparison with the permanent magnet type rotary electric machine according to the third embodiment. この発明の実施の形態４に係る永久磁石式回転電機の要部を示す平面図である。It is a top view which shows the principal part of the permanent-magnet-type rotary electric machine which concerns on Embodiment 4 of this invention. 図９のＤ部を示す拡大図である。It is an enlarged view which shows the D section of FIG. 実施の形態４に係る永久磁石式回転電機と比較するための比較例におけるティースを通る磁束を示す図である。FIG. 21 is a diagram showing a magnetic flux passing through teeth in a comparative example for comparison with the permanent magnet type rotary electric machine according to the fourth embodiment. この発明の実施の形態５に係る永久磁石式回転電機の要部を示す平面図である。It is a top view which shows the principal part of the permanent-magnet-type rotary electric machine which concerns on Embodiment 5 of this invention. 図１２の永久磁石式回転電機における磁束の流れを示す図である。It is a figure which shows the flow of the magnetic flux in the permanent-magnet-type rotary electric machine of FIG. 実施の形態５に係る永久磁石式回転電機と比較するための比較例における磁束の流れを示す図である。FIG. 21 is a diagram showing the flow of magnetic flux in a comparative example for comparison with the permanent magnet type rotary electric machine according to Embodiment 5. この発明の実施の形態６に係る永久磁石式回転電機の要部を示す平面図である。It is a top view which shows the principal part of the permanent-magnet-type rotary electric machine which concerns on Embodiment 6 of this invention.
　実施の形態１．
　図１は、この発明の実施の形態１に係る永久磁石式回転電機を示す平面図、図２は、図１のＡ部を示す拡大図である。実施の形態１に係る永久磁石式回転電機は、円環形状に形成された固定子１と、固定子１に対向して設けられた回転子２とを備えている。固定子１は、回転子２の径方向について回転子２に対して外側に設けられている。以下、径方向とは、回転子２についての径方向とし、周方向とは、回転子２についての周方向とし、軸方向とは、回転子２についての軸方向とする。 Embodiment 1
FIG. 1 is a plan view showing a permanent magnet type rotary electric machine according to Embodiment 1 of the present invention, and FIG. 2 is an enlarged view showing a portion A of FIG. The permanent magnet type rotary electric machine according to the first embodiment includes a stator 1 formed in an annular shape, and a rotor 2 provided opposite to the stator 1. The stator 1 is provided outside the rotor 2 in the radial direction of the rotor 2. Hereinafter, the radial direction is the radial direction of the rotor 2, the circumferential direction is the circumferential direction of the rotor 2, and the axial direction is the axial direction of the rotor 2.
　固定子１は、固定子鉄心１１と、固定子鉄心１１に設けられた複数のコイル１２とを備えている。固定子鉄心１１は、円環形状に形成されたコアバック１１１と、コアバック１１１から径方向について内側に突出する複数のティース１１２とを有している。複数のティース１１２は、周方向に等間隔に並べて配置されている。周方向に隣り合うそれぞれのティース１１２の間には、複数のスロット１１３が１個ずつ形成されている。コイル１２は、スロット１１３に設けられている。 The stator 1 includes a stator core 11 and a plurality of coils 12 provided on the stator core 11. The stator core 11 has a core back 111 formed in an annular shape, and a plurality of teeth 112 projecting inward in the radial direction from the core back 111. The plurality of teeth 112 are arranged at equal intervals in the circumferential direction. A plurality of slots 113 are formed one by one between the teeth 112 adjacent in the circumferential direction. The coil 12 is provided in the slot 113.
　回転子２は、円柱形状の回転子鉄心２１と、回転子鉄心２１に埋め込められた複数の永久磁石２２とを備えている。回転子鉄心２１には、一対の磁石挿入孔２１１が周方向に等間隔に複数形成されている。 The rotor 2 includes a cylindrical rotor core 21 and a plurality of permanent magnets 22 embedded in the rotor core 21. A plurality of pairs of magnet insertion holes 211 are formed in the rotor core 21 at equal intervals in the circumferential direction.
　一対の磁石挿入孔２１１は、軸方向に視た場合に径方向について外側に向かうにつれて互いに離れるＶ字形状に形成されている。一対の磁石挿入孔２１１のそれぞれには、永久磁石２２が１個ずつ挿入されている。一対の磁石挿入孔２１１に挿入された一対の永久磁石２２は、軸方向に視た場合に径方向について外側に向かうにつれて互いに離れるＶ字形状に配置されている。 When viewed in the axial direction, the pair of magnet insertion holes 211 are formed in a V shape so as to be away from each other as it goes outward in the radial direction. One permanent magnet 22 is inserted into each of the pair of magnet insertion holes 211. The pair of permanent magnets 22 inserted into the pair of magnet insertion holes 211 are arranged in a V shape so as to be away from each other as it goes outward in the radial direction when viewed in the axial direction.
　回転子鉄心２１における径方向について外側の部分であって一対の永久磁石２２の間の部分には、複数の外周側磁気スリット２１２が形成されている。この例では、２本の外周側磁気スリット２１２が形成されている。２本の外周側磁気スリット２１２の中の一方を第１外周側磁気スリット２１２ａとし、他方を第２外周側磁気スリット２１２ｂとする。第１外周側磁気スリット２１２ａおよび第２外周側磁気スリット２１２ｂのそれぞれは、Ｕ字形状に形成されている。第１外周側磁気スリット２１２ａおよび第２外周側磁気スリット２１２ｂのそれぞれは、両端部が径方向について外側に配置され、中間部が径方向について内側に配置されている。第２外周側磁気スリット２１２ｂは、第１外周側磁気スリット２１２ａの内側に配置されている。したがって、第１外周側磁気スリット２１２ａは、第２外周側磁気スリット２１２ｂよりも永久磁石２２に対して近くに配置されている。 A plurality of outer circumferential side magnetic slits 212 are formed in a portion of the rotor core 21 which is the outer side in the radial direction and between the pair of permanent magnets 22. In this example, two outer circumferential magnetic slits 212 are formed. One of the two outer circumferential magnetic slits 212 is taken as a first outer circumferential magnetic slit 212a, and the other is taken as a second outer circumferential magnetic slit 212b. Each of the first outer circumferential magnetic slit 212a and the second outer circumferential magnetic slit 212b is formed in a U-shape. Both ends of the first outer circumferential magnetic slit 212a and the second outer circumferential magnetic slit 212b are disposed radially outward, and an intermediate portion is disposed radially inwardly. The second outer circumferential magnetic slit 212 b is disposed inside the first outer circumferential magnetic slit 212 a. Therefore, the first outer circumferential magnetic slit 212a is disposed closer to the permanent magnet 22 than the second outer circumferential magnetic slit 212b.
　固定子鉄心１１における一対の磁石挿入孔２１１の間の部分であって径方向について内側の部分には、内周側磁気スリット２１３が形成されている。 An inner circumferential magnetic slit 213 is formed in a portion between the pair of magnet insertion holes 211 in the stator core 11 and in the radially inner portion.
　図３は、図２のＢ部を示す拡大図である。磁石挿入孔２１１における径方向について外側の部分であって永久磁石２２が挿入されていない部分を径方向外側磁気スリット２１１ａとする。また、磁石挿入孔２１１における径方向について内側の部分であって永久磁石２２が挿入されていない部分を径方向内側磁気スリット２１１ｂとする。 FIG. 3 is an enlarged view showing a portion B of FIG. A portion of the magnet insertion hole 211 which is the outer side in the radial direction and in which the permanent magnet 22 is not inserted is referred to as a radial outer magnetic slit 211 a. In addition, a portion which is an inner side in the radial direction in the magnet insertion hole 211 and in which the permanent magnet 22 is not inserted is referred to as a radial inner magnetic slit 211b.
　内周側磁気スリット２１３は、一対の磁石挿入孔２１１におけるそれぞれの径方向内側磁気スリット２１１ｂの間に配置されている。一対の磁石挿入孔２１１におけるそれぞれの径方向内側磁気スリット２１１ｂと内周側磁気スリット２１３との間にある回転子鉄心２１の部分を内側磁石間磁路２１４とする。内側磁石間磁路２１４は、回転子鉄心２１における一対の永久磁石２２の間の部分であって径方向について内側の部分の磁路となる。図３では、一方の磁石挿入孔２１１の径方向内側磁気スリット２１１ｂと内周側磁気スリット２１３との間の内側磁石間磁路２１４の部分を示している。 The inner circumferential magnetic slits 213 are disposed between the radially inner magnetic slits 211 b in the pair of magnet insertion holes 211. A portion of the rotor core 21 located between the radially inner magnetic slit 211 b and the inner magnetic slit 213 in each of the pair of magnet insertion holes 211 is referred to as an inner inter-magnet magnetic path 214. The inner inter-magnet magnetic path 214 is a portion between the pair of permanent magnets 22 in the rotor core 21 and serves as a magnetic path on the inner side in the radial direction. FIG. 3 shows a portion of the inter-magnet magnetic path 214 between the radially inner magnetic slit 211 b of the one magnet insertion hole 211 and the inner circumferential magnetic slit 213.
　回転子鉄心２１における一対の永久磁石２２の間を通るとともに径方向に延びる部分をｄ軸とする。ｄ軸は、回転子鉄心２１における磁束の通り難い部分である。回転子鉄心２１における永久磁石２２と第１外周側磁気スリット２１２ａとの間の部分には、ｑ軸磁路が形成されている。ｑ軸磁路における径方向について外側の部分をｑ軸磁路出口部分２１５とする。ｑ軸磁路は、回転子鉄心２１におけるｑ軸の磁束が通る部分である。 A portion of the rotor core 21 passing between the pair of permanent magnets 22 and extending in the radial direction is taken as a d-axis. The d-axis is a portion where the magnetic flux in the rotor core 21 is difficult to pass. A q-axis magnetic path is formed in a portion of the rotor core 21 between the permanent magnet 22 and the first outer magnetic slit 212a. A radially outer portion of the q-axis magnetic path is taken as a q-axis magnetic path outlet portion 215. The q-axis magnetic path is a portion through which the q-axis magnetic flux in the rotor core 21 passes.
　ｑ軸磁路出口部分２１５の幅方向寸法をｄ1とする。軸方向に視た場合の永久磁石２２の磁化方向に対する垂直方向についての永久磁石２２の寸法をＷ2とする。内側磁石間磁路２１４の幅方向寸法の半分の寸法をＷ4とする。永久磁石２２の残留磁束密度をＢmagとする。回転子鉄心２１の磁化が飽和した際の磁束密度をＢsとする。この場合に、ｄ1＞Ｗ2×Ｂmag／Ｂs－Ｗ4を満たすように回転子２が形成されている。 The dimension in the width direction of the q-axis magnetic path outlet portion 215 is d 1 . The dimensions of the permanent magnet 22 in the vertical direction with respect to the magnetization direction of the permanent magnet 22 when viewed in the axial direction and W 2. Half of dimensions in the width direction dimension of the inner magnet between the magnetic path 214 and W 4. The residual magnetic flux density of the permanent magnet 22 is B mag . The magnetic flux density when the magnetization of the rotor core 21 is saturated is assumed to be B s . In this case, the rotor 2 is formed to satisfy d 1 > W 2 × B mag / B s −W 4 .
　永久磁石２２の総磁束量は、Ｗ2×Ｂmagと表される。一対の径方向内側磁気スリット２１１ｂにおける一方の径方向内側磁気スリット２１１ｂと内周側磁気スリット２１３との間の漏れ磁束は、Ｗ4×Ｂsと表される。したがって、ｑ軸磁路出口部分２１５を通る磁束は、Ｗ2×Ｂmag－Ｗ4×Ｂ2と表される。これにより、ｑ軸磁路出口部分２１５の磁束密度は、（Ｗ2×Ｂmag－Ｗ4×Ｂ2）／ｄ1と表される。その結果、ｑ軸磁路出口部分２１５の磁気飽和を防ぐためには、回転子鉄心２１の磁化が飽和した際の磁束密度Ｂsよりもｑ軸磁路出口部分２１５の磁束密度（Ｗ2×Ｂmag－Ｗ4×Ｂ2）／ｄ1が低くなるようにすればよい。 The total amount of magnetic flux of the permanent magnet 22 is expressed as W 2 × B mag . The leakage flux between one radially inner magnetic slit 211 b and the inner circumferential magnetic slit 213 in the pair of radially inner magnetic slits 211 b is expressed as W 4 × B s . Therefore, the magnetic flux passing through the q-axis magnetic path exit portion 215 is expressed as W 2 × B mag −W 4 × B 2 . Accordingly, the magnetic flux density of the q-axis magnetic path exit portion 215 is expressed as (W 2 × B mag −W 4 × B 2 ) / d 1 . As a result, in order to prevent the magnetic saturation of the q-axis magnetic path outlet portion 215, the magnetic flux density (W 2 × B) of the q-axis magnetic path outlet portion 215 is more than the magnetic flux density B s when the magnetization of the rotor core 21 is saturated. It is sufficient to reduce mag -W 4 × B 2 ) / d 1 .
　現実的な設計を行った場合に、Ｂmagは、１．１５（Ｔ）～１．３０（Ｔ）となり、Ｂsは、１．７（Ｔ）～１．９（Ｔ）となる。これにより、Ｂmag／Ｂs＞０．６０となる。したがって、ｄ1＞０．６×Ｗ2－Ｗ4を満たすように回転子２が形成されている。 In a realistic design, B mag is 1.15 (T) to 1.30 (T), and B s is 1.7 (T) to 1.9 (T). As a result, B mag / B s > 0.60. Therefore, the rotor 2 is formed to satisfy d 1 > 0.6 × W 2 -W 4 .
　以上説明したように、この発明の実施の形態１に係る永久磁石式回転電機によれば、ｄ1＞０．６×Ｗ2－Ｗ4が満たされる。これにより、ｑ軸磁路出口部分２１５における磁気飽和が防がれる。その結果、ｑ軸インダクタンスを大きくすることができる。したがって、永久磁石式回転電機のリラクタンストルクを大きくすることができる。 As described above, according to the permanent magnet type rotary electric machine according to the first embodiment of the present invention, d 1 > 0.6 × W 2 -W 4 is satisfied. This prevents magnetic saturation at the q-axis magnetic path exit portion 215. As a result, the q-axis inductance can be increased. Therefore, the reluctance torque of the permanent magnet type rotary electric machine can be increased.
　また、回転子鉄心２１における一対の永久磁石２２の間の部分には、複数の外周側磁気スリット２１２が形成されている。これにより、外周側磁気スリット２１２が電機子磁束を遮ることによる磁気抵抗の増加を抑制するとともに、ｄ軸インダクタンスを低下させることができる。その結果、永久磁石式回転電機の突極比を増加させることができる。したがって、永久磁石式回転電機のリラクタンストルクを増加させることができる。 A plurality of outer circumferential magnetic slits 212 are formed in a portion between the pair of permanent magnets 22 in the rotor core 21. As a result, it is possible to suppress the increase in magnetic resistance due to the outer circumferential magnetic slit 212 interrupting the armature magnetic flux, and to reduce the d-axis inductance. As a result, the salient pole ratio of the permanent magnet type rotary electric machine can be increased. Therefore, the reluctance torque of the permanent magnet type rotating electrical machine can be increased.
　実施の形態２．
　図４は、この発明の実施の形態２に係る永久磁石式回転電機の要部を示す平面図である。回転子鉄心２１における永久磁石２２と第１外周側磁気スリット２１２ａとの間の部分であって、最も幅方向寸法が小さい部分の幅方向寸法をｄ2とする。この例では、ｄ1＞ｄ2とする。軸方向に視た場合の永久磁石２２の磁化方向に対する垂直方向について、永久磁石２２における第１外周側磁気スリット２１２ａと最も近い部分である最接近部分２２ａと永久磁石２２における径方向について内側の部分２２ｂとの間の寸法をＷ3とする。この場合に、ｄ2＞Ｗ3×Ｂmag／Ｂs－Ｗ4を満たすように回転子２が形成されている。言い換えれば、ｄ2＞０．６×Ｗ3－Ｗ4を満たすように回転子２が形成されている。その他の構成は、実施の形態１と同様である。 Second Embodiment
FIG. 4 is a plan view showing the main part of a permanent magnet type rotary electric machine according to Embodiment 2 of the present invention. A portion between the permanent magnets 22 in the rotor core 21 and the first outer peripheral side magnetic slit 212a, the width dimension of the portion most widthwise dimension as small as d 2. In this example, d 1 > d 2 . With respect to the direction perpendicular to the magnetization direction of the permanent magnet 22 when viewed in the axial direction, the innermost portion in the radial direction of the closest part 22a closest to the first outer peripheral magnetic slit 212a in the permanent magnet 22 and the permanent magnet 22 the dimension between the 22b to W 3. In this case, the rotor 2 is formed to satisfy d 2 > W 3 × B mag / B s −W 4 . In other words, the rotor 2 is formed to satisfy d 2 > 0.6 × W 3 -W 4 . The other configuration is the same as that of the first embodiment.
　以上説明したように、この発明の実施の形態２に係る永久磁石式回転電機によれば、ｄ2＞Ｗ3×Ｂmag／Ｂs－Ｗ4が満たされる。これにより、回転子鉄心２１における永久磁石２２と第１外周側磁気スリット２１２ａとの間の部分の磁気飽和が防がれる。その結果、ｑ軸インダクタンスを低下させることなく、第１外周側磁気スリット２１２ａを大きくすることができる。したがって、ｑ軸インダクタンスを低下させることなく、ｄ軸インダクタンスを低下させることができる。その結果、永久磁石式回転電機の突極比を増加させることができる。 As described above, according to the permanent magnet type rotary electric machine according to the second embodiment of the present invention, d 2 > W 3 × B mag / B s -W 4 is satisfied. Thereby, magnetic saturation of a portion of the rotor core 21 between the permanent magnet 22 and the first outer circumferential magnetic slit 212a is prevented. As a result, the first outer magnetic slit 212a can be enlarged without reducing the q-axis inductance. Therefore, the d-axis inductance can be reduced without reducing the q-axis inductance. As a result, the salient pole ratio of the permanent magnet type rotary electric machine can be increased.
　実施の形態３．
　図５は、この発明の実施の形態３に係る永久磁石式回転電機の要部を示す平面図、図６は、図５のＣ部を示す拡大図である。ティース１１２における最も幅方向寸法が小さい部分における幅方向寸法をｄ3とする。第１外周側磁気スリット２１２ａにおけるｑ軸磁路出口部分２１５に対して周方向に隣り合う部分の幅方向寸法をＷ5とする。この場合に、ｄ3＞Ｗ5を満たすように永久磁石式回転電機が形成されている。その他の構成は、実施の形態１または実施の形態２と同様である。 Third Embodiment
5 is a plan view showing the main part of a permanent magnet type rotary electric machine according to Embodiment 3 of the present invention, and FIG. 6 is an enlarged view showing a portion C of FIG. The widthwise dimension of the portion widest dimension is smaller in the teeth 112 and d 3. The widthwise dimension of the adjacent portion in the circumferential direction with respect to the q-axis magnetic path outlet portion 215 of the first outer peripheral side magnetic slit 212a and W 5. In this case, a permanent magnet type rotary electric machine is formed to satisfy d 3 > W 5 . The other configuration is the same as that of the first embodiment or the second embodiment.
　図７は、図５のティース１１２を通る磁束を示す図、図８は、実施の形態３に係る永久磁石式回転電機と比較するための比較例におけるティース１１２を通る磁束を示す図である。ｄ3＞Ｗ5を満たすように第１外周側磁気スリット２１２ａを形成した場合には、第１外周側磁気スリット２１２ａにおけるｑ軸磁路出口部分２１５に対して周方向に隣り合う部分がティース１１２と対向する場合であっても、ティース１１２を通る磁束φがｑ軸磁路を通る。これにより、ティース１１２を通る磁束φが第１外周側磁気スリット２１２ａによって妨げられることが抑制される。その結果、永久磁石式回転電機のトルクの減少が低減される。 FIG. 7 is a view showing a magnetic flux passing through the teeth 112 of FIG. 5, and FIG. 8 is a view showing a magnetic flux passing through the teeth 112 in a comparative example for comparison with the permanent magnet type rotating electric machine according to the third embodiment. When the first outer magnetic slit 212 a is formed to satisfy d 3 > W 5 , a portion adjacent to the q-axis magnetic path outlet portion 215 in the first outer magnetic slit 212 a in the circumferential direction is the tooth 112 The magnetic flux φ passing through the teeth 112 passes through the q-axis magnetic path even when facing the This prevents the magnetic flux φ passing through the teeth 112 from being hindered by the first outer circumferential magnetic slit 212a. As a result, the decrease in torque of the permanent magnet type rotary electric machine is reduced.
　一方、ｄ3≦Ｗ5を満たすように第１外周側磁気スリット２１２ｃを形成した場合には、第１外周側磁気スリット２１２ｃにおけるｑ軸磁路出口部分２１５に対して周方向に隣り合う部分がティース１１２と対向する場合に、ティース１１２を通る磁束φがｑ軸磁路を通らない。これにより、ティース１１２を通る磁束φが第１外周側磁気スリット２１２ａによって妨げられる。その結果、ｑ軸磁路の磁気抵抗が増加する。したがって、永久磁石式回転電機のトルクが減少する。 On the other hand, when the first outer magnetic slit 212c is formed to satisfy d 3 ≦ W 5 , a portion adjacent to the q-axis magnetic path outlet portion 215 in the first outer magnetic slit 212c in the circumferential direction is When facing the teeth 112, the magnetic flux φ passing through the teeth 112 does not pass through the q-axis magnetic path. Thereby, the magnetic flux テ ィ ー passing through the teeth 112 is blocked by the first outer circumferential magnetic slit 212a. As a result, the reluctance of the q-axis magnetic path increases. Therefore, the torque of the permanent magnet type rotary electric machine is reduced.
　以上説明したように、この発明の実施の形態３に係る永久磁石式回転電機によれば、ｄ3＞Ｗ5を満たす。これにより、永久磁石式回転電機のトルクの減少を低減させることができる。 As described above, according to the permanent magnet type rotary electric machine according to the third embodiment of the present invention, d 3 > W 5 is satisfied. Thereby, the decrease in torque of the permanent magnet type rotary electric machine can be reduced.
　実施の形態４．
　図９は、この発明の実施の形態４に係る永久磁石式回転電機の要部を示す平面図、図１０は、図９のＤ部を示す拡大図である。ｑ軸磁路出口部分２１５の幅方向寸法をｄ1とする。ティース１１２における最も幅方向寸法が小さい部分の幅方向寸法をｄ3とする。この場合に、ｄ3＜ｄ1を満たすように永久磁石式回転電機が形成されている。その他の構成は、実施の形態１から実施の形態３までの何れかと同様である。 Fourth Embodiment
9 is a plan view showing an essential part of a permanent magnet type rotary electric machine according to Embodiment 4 of the present invention, and FIG. 10 is an enlarged view showing a portion D of FIG. The dimension in the width direction of the q-axis magnetic path outlet portion 215 is d 1 . The widthwise dimension of the portion widest dimension is smaller in the teeth 112 and d 3. In this case, a permanent magnet type rotary electric machine is formed to satisfy d 3 <d 1 . The other configuration is the same as any one of the first to third embodiments.
　ｄ3＜ｄ1を満たすように永久磁石式回転電機を形成した場合には、電機子磁束φAおよびマグネット磁束φMによるｑ軸磁路出口部分２１５における磁気飽和が抑制される。図１１は、実施の形態４に係る永久磁石式回転電機と比較するための比較例におけるティース１１２を通る磁束を示す図である。ｄ3≧ｄ2を満たすように永久磁石式回転電機を形成した場合には、電機子磁束φAおよびマグネット磁束φMによるｑ軸磁路出口部分２１５における磁気飽和が生じる。これにより、回転子鉄心２１における磁気抵抗が増加する。 When the permanent magnet type rotary electric machine is formed to satisfy d 3 <d 1 , magnetic saturation in the q-axis magnetic path exit portion 215 due to the armature magnetic flux φ A and the magnet magnetic flux φ M is suppressed. FIG. 11 is a diagram showing a magnetic flux passing through the teeth 112 in a comparative example for comparison with the permanent magnet type rotary electric machine according to the fourth embodiment. When the permanent magnet type rotary electric machine is formed to satisfy d 3 dd 2 , magnetic saturation occurs in the q-axis magnetic path exit portion 215 due to the armature magnetic flux φ A and the magnet magnetic flux φ M. Thereby, the magnetic resistance in the rotor core 21 is increased.
　以上説明したように、この発明の実施の形態４に係る永久磁石式回転電機によれば、ｄ3＜ｄ1を満たす。これにより、電機子磁束φAおよびマグネット磁束φMによるｑ軸磁路出口部分２１５における磁気飽和を抑制することができる。その結果、回転子鉄心２１の磁気抵抗の増加を抑制することができる。 As described above, according to the permanent magnet type rotary electric machine according to the fourth embodiment of the present invention, d 3 <d 1 is satisfied. Thereby, the magnetic saturation in the q-axis magnetic path exit portion 215 due to the armature magnetic flux φ A and the magnet magnetic flux φ M can be suppressed. As a result, the increase in the magnetic reluctance of the rotor core 21 can be suppressed.
　実施の形態５．
　図１２は、この発明の実施の形態５に係る永久磁石式回転電機の要部を示す平面図である。ティース１１２における最も幅方向寸法が小さいである最小幅部分１１４の幅方向寸法をｄ3とする。ティース１１２における最小幅部分１１４に対して周方向に隣り合うスロット１１３の部分の幅方向寸法をＷ6とする。第１外周側磁気スリット２１２ａにおけるｑ軸磁路出口部分２１５に対して周方向に隣り合う部分の幅方向寸法をＷ5とする。この場合に、ｄ1＋Ｗ5＜ｄ3＋Ｗ6を満たすように、永久磁石式回転電機が形成されている。その他の構成は、実施の形態１から実施の形態４までの何れかと同様である。 Embodiment 5
FIG. 12 is a plan view showing the main part of a permanent magnet type rotary electric machine according to Embodiment 5 of the present invention. The widthwise dimension of the minimum width portion 114 is widest dimension is smaller in the teeth 112 and d 3. The widthwise dimension of the portion of the slot 113 adjacent to the least width portion 114 in the circumferential direction of the teeth 112 and W 6. The widthwise dimension of the adjacent portion in the circumferential direction with respect to the q-axis magnetic path outlet portion 215 of the first outer peripheral side magnetic slit 212a and W 5. In this case, a permanent magnet type rotary electric machine is formed so as to satisfy d 1 + W 5 <d 3 + W 6 . The other configuration is the same as any one of the first to fourth embodiments.
　図１３は、図１２の永久磁石式回転電機における磁束の流れを示す図である。ｄ1＋Ｗ5＜ｄ3＋Ｗ6を満たすように永久磁石式回転電機を形成した場合には、電機子磁束φAは、回転子鉄心２１における周方向について第１外周側磁気スリット２１２ａの両方に隣り合う部分を通ることができる。これにより、回転子鉄心２１における磁気抵抗の低下が抑制される。その結果、永久磁石式回転電機のリラクタンストルクの低下が抑制される。 FIG. 13 is a diagram showing the flow of magnetic flux in the permanent magnet type rotary electric machine of FIG. When a permanent magnet type rotary electric machine is formed to satisfy d 1 + W 5 <d 3 + W 6 , the armature magnetic flux φ A is applied to both of the first outer magnetic slits 212 a in the circumferential direction of the rotor core 21. It can pass through adjacent parts. Thereby, the fall of the magnetic resistance in rotor iron core 21 is controlled. As a result, the reduction in reluctance torque of the permanent magnet type rotary electric machine is suppressed.
　図１４は、実施の形態５に係る永久磁石式回転電機と比較するための比較例における磁束の流れを示す図である。図１４では、ｄ1＋Ｗ5＞ｄ3＋Ｗ6を満たすように永久磁石式回転電機が形成されている。ｄ1＋Ｗ5＞ｄ3＋Ｗ6を満たすように永久磁石式回転電機を形成した場合には、電機子磁束φAは、回転子鉄心２１における第１外周側磁気スリット２１２ａと第２外周側磁気スリット２１２ｂとの間を通ることができない。また、この場合には、電機子磁束φAは、回転子鉄心２１における第１外周側磁気スリット２１２ａと永久磁石２２との間を通る。言い換えれば、電機子磁束φAは、回転子鉄心２１における周方向について第１外周側磁気スリット２１２ａの一方に隣り合う部分にのみ通ることができる。これにより、回転子鉄心２１における磁気抵抗が低下する。その結果、回転子２の回転角に応じて回転子鉄心２１における磁気抵抗が低下する。したがって、永久磁石式回転電機のリラクタンストルクが低下する。 FIG. 14 is a diagram showing the flow of magnetic flux in a comparative example for comparison with the permanent magnet type rotary electric machine according to the fifth embodiment. In FIG. 14, a permanent magnet type rotary electric machine is formed so as to satisfy d 1 + W 5 > d 3 + W 6 . When the permanent magnet type rotary electric machine is formed to satisfy d 1 + W 5 > d 3 + W 6 , the armature magnetic flux φ A is generated by the first outer magnetic slit 212 a and the second outer magnetic magnet 212 in the rotor core 21. It can not pass between the slit 212b. Further, in this case, the armature magnetic flux φ A passes between the first outer magnetic slit 212 a in the rotor core 21 and the permanent magnet 22. In other words, the armature magnetic flux φ A can pass only to a portion adjacent to one of the first outer magnetic slits 212 a in the circumferential direction of the rotor core 21. Thereby, the magnetic resistance in the rotor core 21 is reduced. As a result, the reluctance of the rotor core 21 decreases according to the rotation angle of the rotor 2. Therefore, the reluctance torque of the permanent magnet type rotary electric machine is reduced.
　以上説明したように、この発明の実施の形態５に係る永久磁石式回転電機によれば、ｄ1＋Ｗ5＜ｄ3＋Ｗ6を満たす。これにより、回転子鉄心２１における磁気抵抗の低下を抑抑制することができる。その結果、永久磁石式回転電機のリラクタンストルクの低下を抑制することができる。 As described above, according to the permanent magnet type rotary electric machine according to the fifth embodiment of the present invention, d 1 + W 5 <d 3 + W 6 is satisfied. Thereby, the reduction of the magnetic resistance in the rotor core 21 can be suppressed. As a result, it is possible to suppress a decrease in reluctance torque of the permanent magnet type rotary electric machine.
　実施の形態６．
　図１５は、この発明の実施の形態６に係る永久磁石式回転電機の要部を示す平面図である。回転子鉄心２１の外周面であって外周側磁気スリット２１２に対して径方向に隣り合う部分には、溝２１６が形成されている。回転子鉄心２１に溝２１６が形成されることによって、回転子鉄心２１が軽量化される。 Sixth Embodiment
FIG. 15 is a plan view showing an essential part of a permanent magnet type rotary electric machine according to Embodiment 6 of the present invention. A groove 216 is formed on the outer peripheral surface of the rotor core 21 at a portion adjacent to the outer peripheral magnetic slit 212 in the radial direction. The formation of the grooves 216 in the rotor core 21 reduces the weight of the rotor core 21.
　ティース１１２における最も幅方向寸法が小さいである最小幅部分１１４の幅方向寸法をｄ3とする。第１外周側磁気スリット２１２ａにおけるｑ軸磁路出口部分２１５に対して周方向に隣り合う部分の幅方向寸法をＷ5とする。この場合に、ｄ軸を中心として周方向について±ｄ3／２の範囲内にある外周側磁気スリット２１２は、ｄ3＞Ｗ5を満たす必要はない。その他の構成は、実施の形態１から実施の形態５までの何れかと同様である。 The widthwise dimension of the minimum width portion 114 is widest dimension is smaller in the teeth 112 and d 3. The widthwise dimension of the adjacent portion in the circumferential direction with respect to the q-axis magnetic path outlet portion 215 of the first outer peripheral side magnetic slit 212a and W 5. In this case, the outer peripheral side magnetic slit 212 that are within the circumferential direction about ± d 3/2 around the d-axis, d 3> W 5 need not meet. The other configuration is the same as any one of the first to fifth embodiments.
　以上説明したように、この発明の実施の形態６に係る永久磁石式回転電機によれば、回転子鉄心２１の外周面であって外周側磁気スリット２１２に対して径方向に隣り合う部分には、溝２１６が形成されている。これにより、回転子２が高回転する場合に、遠心力によって回転子鉄心２１に作用する応力を低減させることができる。 As described above, according to the permanent magnet type rotary electric machine according to the sixth embodiment of the present invention, in the portion which is the outer peripheral surface of the rotor core 21 and radially adjacent to the outer peripheral magnetic slit 212 , Grooves 216 are formed. Thereby, when the rotor 2 rotates at high speed, the stress acting on the rotor core 21 by the centrifugal force can be reduced.
　また、ｄ軸を中心として周方向について±ｄ3／２の範囲内にある外周側磁気スリット２１２が形成される磁路は、永久磁石式回転電機のリラクタンストルクに寄与することが小さい。したがって、外周側磁気スリット２１２におけるｑ軸磁路出口部分２１５に対して周方向に隣り合う部分の幅方向寸法Ｗ5をティース１１２の最小幅部分１１４の幅方向寸法ｄ3よりも大きくしても、永久磁石式回転電機のリラクタンストルクに与える影響が小さい。 Moreover, a magnetic path outer peripheral side magnetic slit 212 is within the range of ± d 3/2 in the circumferential direction about the d-axis is formed, it is small to contribute to the reluctance torque of the permanent magnet type rotating electrical machine. Therefore, even if larger than the width dimension d 3 of the smallest width portion 114 of the width dimension W 5 parts adjacent in the circumferential direction with respect to the q-axis magnetic path outlet portion 215 at the outer peripheral side magnetic slit 212 teeth 112 The influence on the reluctance torque of the permanent magnet type rotary electric machine is small.
　なお、各上記実施の形態では、固定子鉄心１１における径方向について外側の部分であって一対の永久磁石２２の間の部分に２本の外周側磁気スリット２１２が形成された構成について説明した。これに対して、固定子鉄心１１における径方向について外側の部分であって一対の永久磁石２２の間の部分に１本の外周側磁気スリット２１２が形成された構成、または、３本以上の外周側磁気スリット２１２が形成された構成であってもよい。 In each of the above-described embodiments, the configuration has been described in which two outer circumferential magnetic slits 212 are formed in a portion outside the radial direction of the stator core 11 and between the pair of permanent magnets 22. On the other hand, a configuration in which one outer peripheral magnetic slit 212 is formed at a portion between the pair of permanent magnets 22 which is an outer portion in the radial direction of the stator core 11, or three or more outer peripherals. The side magnetic slit 212 may be formed.
　１　固定子、２　回転子、１１　固定子鉄心、１２　コイル、２１　回転子鉄心、２２　永久磁石、２２ａ　最接近部分、１１１　コアバック、１１２　ティース、１１３　スロット、１１４　最小幅部分、２１　回転子鉄心、２２　永久磁石、２１１　磁石挿入孔、２１１ａ　径方向外側磁気スリット、２１１ｂ　径方向内側磁気スリット、２１２　外周側磁気スリット、２１２ａ　第１外周側磁気スリット、２１２ｂ　第２外周側磁気スリット、２１３　内周側磁気スリット、２１４　内側磁石間磁路、２１５　ｑ軸磁路出口部分、２１６　溝。 Reference Signs List 1 stator, 2 rotors, 11 stator cores, 12 coils, 21 rotor cores, 22 permanent magnets, 22a closest portion, 111 core backs, 112 teeth, 113 slots, 114 minimum width portions, 21 rotor cores, 22 permanent magnet, 211 magnet insertion hole, 211a radial outer magnetic slit, 211b radial inner magnetic slit, 212 outer peripheral magnetic slit, 212a first outer magnetic slit, 212b second outer magnetic slit, 213 inner magnetic Slit, 214 magnetic path between inner magnets, 215 q axis magnetic path exit, 216 grooves.

Claims (8)

  1. 　回転子と、
    　前記回転子の径方向について前記回転子に対して外側に設けられた固定子と
    　を備え、
    　前記回転子は、一対の磁石挿入孔が形成された回転子鉄心と、一対の前記磁石挿入孔のそれぞれに挿入された一対の永久磁石とを有し、
    　一対の前記永久磁石は、前記回転子の軸方向に視た場合に前記径方向について外側に向かうにつれて互いに離れるＶ字形状に配置され、
    　前記回転子鉄心における前記径方向について外側の部分であって一対の前記永久磁石の間の部分には、外周側磁気スリットが形成され、
    　前記回転子鉄心における前記永久磁石と前記外周側磁気スリットとの間の部分には、ｑ軸磁路が形成され、
    　前記ｑ軸磁路における前記径方向について外側の部分であるｑ軸磁路出口部分の幅方向寸法をｄ1とし、前記軸方向に視た場合の前記永久磁石の磁化方向に対する垂直方向についての前記永久磁石の寸法をＷ2とし、前記回転子鉄心における一対の前記永久磁石の間の部分であって前記径方向について内側の部分の磁路である内側磁石間磁路の幅方向寸法の半分の寸法をＷ4とした場合に、
    　ｄ1＞０．６×Ｗ2－Ｗ4
    　を満たす永久磁石式回転電機。     With the rotor,
    A stator provided outside the rotor with respect to the radial direction of the rotor;
    The rotor has a rotor core in which a pair of magnet insertion holes are formed, and a pair of permanent magnets inserted in each of the pair of magnet insertion holes.
    When viewed in the axial direction of the rotor, the pair of permanent magnets are arranged in a V shape so as to be away from each other in the radial direction.
    An outer circumferential side magnetic slit is formed in a portion of the rotor core which is the outer side in the radial direction and between the pair of permanent magnets,
    A q-axis magnetic path is formed in a portion of the rotor core between the permanent magnet and the outer magnetic slit.
    The dimension in the width direction of the q-axis magnetic path outlet portion which is the outer portion in the radial direction in the q-axis magnetic path is d 1 , and the above in the direction perpendicular to the magnetization direction of the permanent magnet when viewed in the axial direction The dimension of the permanent magnet is W 2 , which is a half of the width direction dimension of the magnetic path between the inner magnets which is a portion between the pair of permanent magnets in the rotor core and is a magnetic path in an inner portion in the radial direction. in the case where the size was W 4,
    d 1 > 0.6 × W 2 -W 4
    A permanent magnet type rotary electric machine that meets
  2. 　回転子と、
    　前記回転子の径方向について前記回転子に対して外側に設けられた固定子と
    　を備え、
    　前記回転子は、一対の磁石挿入孔が形成された回転子鉄心と、一対の前記磁石挿入孔のそれぞれに挿入された一対の永久磁石とを有し、
    　一対の前記永久磁石は、前記回転子の軸方向に視た場合に前記径方向について外側に向かうにつれて互いに離れるＶ字形状に配置され、
    　前記回転子鉄心における前記径方向について外側の部分であって一対の前記永久磁石の間の部分には、外周側磁気スリットが形成され、
    　前記回転子鉄心における前記永久磁石と前記外周側磁気スリットとの間の部分には、ｑ軸磁路が形成され、
    　前記ｑ軸磁路における前記径方向について外側の部分であるｑ軸磁路出口部分の幅方向寸法をｄ1とし、前記軸方向に視た場合の前記永久磁石の磁化方向に対する垂直方向についての前記永久磁石の寸法をＷ2とし、前記回転子鉄心における一対の前記永久磁石の間の部分であって前記径方向について内側の部分の磁路である内側磁石間磁路の幅方向寸法の半分の寸法をＷ4とし、前記永久磁石の残留磁束密度をＢmagとし、前記回転子鉄心の磁化が飽和した際の磁束密度をＢsとした場合に、
    　ｄ1＞Ｗ2×Ｂmag／Ｂs－Ｗ4
    　を満たす永久磁石式回転電機。     With the rotor,
    A stator provided outside the rotor with respect to the radial direction of the rotor;
    The rotor has a rotor core in which a pair of magnet insertion holes are formed, and a pair of permanent magnets inserted in each of the pair of magnet insertion holes.
    When viewed in the axial direction of the rotor, the pair of permanent magnets are arranged in a V shape so as to be away from each other in the radial direction.
    An outer circumferential side magnetic slit is formed in a portion of the rotor core which is the outer side in the radial direction and between the pair of permanent magnets,
    A q-axis magnetic path is formed in a portion of the rotor core between the permanent magnet and the outer magnetic slit.
    The dimension in the width direction of the q-axis magnetic path outlet portion which is the outer portion in the radial direction in the q-axis magnetic path is d 1 , and the above in the direction perpendicular to the magnetization direction of the permanent magnet when viewed in the axial direction The dimension of the permanent magnet is W 2 , which is a half of the width direction dimension of the magnetic path between the inner magnets which is a portion between the pair of permanent magnets in the rotor core and is a magnetic path in an inner portion in the radial direction. Assuming that the dimension is W 4 , the residual magnetic flux density of the permanent magnet is B mag, and the magnetic flux density when the magnetization of the rotor core is saturated is B s ,
    d 1 > W 2 × B mag / B s -W 4
    A permanent magnet type rotary electric machine that meets
  3. 　前記回転子鉄心における前記永久磁石と前記外周側磁気スリットとの間の部分であって最も幅方向寸法が小さい部分の幅方向寸法をｄ2とし、前記軸方向に視た場合の前記永久磁石の磁化方向に対する垂直方向について、前記永久磁石における前記外周側磁気スリットと最も近い部分である最接近部分と前記永久磁石における前記径方向について内側の部分との間の寸法をＷ3とした場合に、
    　ｄ2＞Ｗ3×Ｂmag／Ｂs－Ｗ4
    　を満たす請求項２に記載の永久磁石式回転電機。     A dimension of a portion between the permanent magnet and the outer circumferential magnetic slit in the rotor core and having a smallest dimension in the width direction is d 2, and the permanent magnet is viewed in the axial direction When the dimension between the closest portion, which is the portion closest to the outer circumferential magnetic slit in the permanent magnet, and the inner portion in the radial direction of the permanent magnet is W 3 in the direction perpendicular to the magnetization direction,
    d 2 > W 3 × B mag / B s -W 4
    The permanent magnet type rotary electric machine according to claim 2, wherein
  4. 　前記固定子は、先端部が前記回転子に対向し前記回転子の周方向について並べられた複数のティースを有する固定子鉄心を有し、
    　前記ティースにおける最も幅方向寸法が小さい部分の幅方向寸法をｄ3とし、前記外周側磁気スリットにおける前記ｑ軸磁路出口部分に対して前記周方向に隣り合う部分の幅方向寸法をＷ5とした場合に、
    　ｄ3＞Ｗ5
    　を満たす請求項１から請求項３までの何れか一項に記載の永久磁石式回転電機。     The stator has a stator core having a plurality of teeth whose tips are opposed to the rotor and arranged in the circumferential direction of the rotor,
    Let d 3 be the widthwise dimension of the smallest portion in the widthwise direction of the teeth, and W 5 be the widthwise dimension of the portion adjacent to the circumferential direction with respect to the q-axis magnetic path outlet portion of the outer circumferential side magnetic slit If you
    d 3 > W 5
    The permanent magnet type rotary electric machine according to any one of claims 1 to 3, wherein
  5. 　前記固定子は、先端部が前記回転子に対向し前記回転子の周方向について並べられた複数のティースを有する固定子鉄心を有し、
    　前記ティースにおける最も幅方向寸法が小さい部分の幅方向寸法をｄ3とした場合に、
    　ｄ3＜ｄ1
    　を満たす請求項１から請求項４までの何れか一項に記載の永久磁石式回転電機。     The stator has a stator core having a plurality of teeth whose tips are opposed to the rotor and arranged in the circumferential direction of the rotor,
    When the widthwise dimension of the portion with the smallest widthwise dimension in the teeth is d 3 ,
    d 3 <d 1
    The permanent magnet type rotary electric machine according to any one of claims 1 to 4, wherein
  6. 　前記固定子は、先端部が前記回転子に対向し前記回転子の周方向について並べられた複数のティースを有する固定子鉄心を有し、
    　前記固定子鉄心における前記周方向に隣り合う一対の前記ティースの間の部分には、スロットが形成され、
    　前記ティースにおける最も幅方向寸法が小さい部分の最小幅寸法をｄ3とし、前記ティースにおける最も幅方向寸法が小さい部分に対して前記周方向に隣り合う前記スロットの部分の幅方向寸法をＷ6とし、前記外周側磁気スリットにおける前記ｑ軸磁路出口部分に対して前記周方向に隣り合う部分の幅方向寸法をＷ5とした場合に、
    　ｄ1＋Ｗ5＜ｄ3＋Ｗ6
    　を満たす請求項１から請求項５までの何れか一項に記載の永久磁石式回転電機。     The stator has a stator core having a plurality of teeth whose tips are opposed to the rotor and arranged in the circumferential direction of the rotor,
    A slot is formed in a portion between the pair of teeth adjacent in the circumferential direction in the stator core,
    The minimum width dimension of the portion with the smallest width dimension in the teeth is d 3, and the width direction dimension of the portion of the slot adjacent in the circumferential direction with respect to the portion with the smallest width dimension in the teeth is W 6 the widthwise dimension of the portion adjacent to the circumferential direction when the W 5 to the q-axis magnetic path outlet portion in the outer peripheral side magnetic slit,
    d 1 + W 5 <d 3 + W 6
    The permanent magnet type rotary electric machine according to any one of claims 1 to 5, wherein
  7. 　前記回転子鉄心の外周面であって前記外周側磁気スリットに対して前記径方向に隣り合う部分には、溝が形成されている請求項１から請求項６までの何れか一項に記載の永久磁石式回転電機。 The groove is formed in the outer peripheral surface of the said rotor core, and the part adjacent to the said radial direction with respect to the said outer peripheral side magnetic slit is formed in any one of Claim 1 to 6 Permanent magnet type rotating electric machine.
  8. 　前記回転子鉄心における一対の前記永久磁石の間の部分には、複数の前記外周側磁気スリットが形成されている請求項１から請求項７までの何れか一項に記載の永久磁石式回転電機。 The permanent magnet type rotary electric machine according to any one of claims 1 to 7, wherein a plurality of outer circumferential magnetic slits are formed in a portion between the pair of permanent magnets in the rotor core. .
PCT/JP2017/042197 2017-11-24 2017-11-24 Permanent magnet rotating electric machine WO2019102580A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6785522B1 (en) * 2019-11-13 2020-11-18 三菱電機株式会社 Rotating machine
WO2021106395A1 (en) * 2019-11-26 2021-06-03 株式会社安川電機 Rotary electric machine, rotor, and electromagnetic steel plate

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002119027A (en) * 2000-10-12 2002-04-19 Matsushita Electric Ind Co Ltd Motor
JP2004104962A (en) * 2002-09-12 2004-04-02 Toshiba Industrial Products Manufacturing Corp Permanent magnet type reluctance rotary electric machine
JP2005341655A (en) * 2004-05-24 2005-12-08 Denso Corp Rotor of magnet embedded dynamo-electric machine
JP2006187189A (en) * 2004-11-30 2006-07-13 Hitachi Ltd Permanent magnet type rotary electric machine and apparatus
JP2014093914A (en) * 2012-11-06 2014-05-19 Mitsuba Corp Brushless motor
JP2016201960A (en) * 2015-04-14 2016-12-01 株式会社デンソー Embedded magnet type motor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002119027A (en) * 2000-10-12 2002-04-19 Matsushita Electric Ind Co Ltd Motor
JP2004104962A (en) * 2002-09-12 2004-04-02 Toshiba Industrial Products Manufacturing Corp Permanent magnet type reluctance rotary electric machine
JP2005341655A (en) * 2004-05-24 2005-12-08 Denso Corp Rotor of magnet embedded dynamo-electric machine
JP2006187189A (en) * 2004-11-30 2006-07-13 Hitachi Ltd Permanent magnet type rotary electric machine and apparatus
JP2014093914A (en) * 2012-11-06 2014-05-19 Mitsuba Corp Brushless motor
JP2016201960A (en) * 2015-04-14 2016-12-01 株式会社デンソー Embedded magnet type motor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6785522B1 (en) * 2019-11-13 2020-11-18 三菱電機株式会社 Rotating machine
WO2021095167A1 (en) * 2019-11-13 2021-05-20 三菱電機株式会社 Dynamo-electric machine
CN114651383A (en) * 2019-11-13 2022-06-21 三菱电机株式会社 Rotating electrical machine
CN114651383B (en) * 2019-11-13 2023-08-11 三菱电机株式会社 Rotary electric machine
US11967863B2 (en) 2019-11-13 2024-04-23 Mitsubishi Electric Corporation Rotating electric machine
WO2021106395A1 (en) * 2019-11-26 2021-06-03 株式会社安川電機 Rotary electric machine, rotor, and electromagnetic steel plate
JPWO2021106395A1 (en) * 2019-11-26 2021-06-03
JP7461967B2 (en) 2019-11-26 2024-04-04 株式会社安川電機 Rotating electric machines, rotors and electromagnetic steel sheets

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