WO2017042886A1 - Permanent magnet-type rotating electric motor and compressor using same - Google Patents
Permanent magnet-type rotating electric motor and compressor using same Download PDFInfo
- Publication number
- WO2017042886A1 WO2017042886A1 PCT/JP2015/075482 JP2015075482W WO2017042886A1 WO 2017042886 A1 WO2017042886 A1 WO 2017042886A1 JP 2015075482 W JP2015075482 W JP 2015075482W WO 2017042886 A1 WO2017042886 A1 WO 2017042886A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- teeth
- rotor
- permanent magnet
- arc
- outer core
- Prior art date
Links
Images
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
- H02K1/22—Rotating parts of the magnetic circuit
-
- 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
Definitions
- the present invention relates to a permanent magnet rotary motor and a compressor using the same.
- Patent Document 1 As a prior art of a permanent-magnet-type rotary electric machine and a compressor using the same, there is a thing of patent document 1, for example.
- a permanent magnet type rotary electric machine described in Patent Document 1 a plurality of slits are formed outside the permanent magnet insertion holes of the rotor core, and extension lines of the side surfaces of the slits intersect at one point of the magnetic pole center line on the stator side. I have to.
- the motor current is stabilized, operation controllability at high speed rotation in particular is improved, and an effect can be obtained to improve the efficiency and reduce the noise.
- the permanent magnet is disposed as close to the rotor outer diameter as possible. For this reason, the part located in the stator side from a permanent magnet insertion hole among rotor iron cores becomes very small. For this reason, in order to obtain the effect described in Patent Document 1, a plurality of small slits are formed in a portion of the rotor core located closer to the stator than the permanent magnet insertion hole.
- many precision cutting tools are required. Furthermore, it is necessary to shorten the maintenance cycle of the cutting tool and maintain precision molding.
- a permanent magnet rotary motor comprises: a stator having a yoke; and a plurality of teeth extending radially inward from the yoke and around which armature windings are wound.
- a rotor including a rotor core having a plurality of magnet insertion holes formed in the vicinity of the outer peripheral surface, and a plurality of plate-like permanent magnets inserted into the plurality of magnet insertion holes,
- the iron core has an outer iron core located on the outer diameter side of each magnet insertion hole, and a recess is formed between the adjacent magnet insertion holes in the rotor iron core, and the outer iron core is the permanent magnet It has an end located on the outer diameter side of both ends in the width direction of the magnet, and a center located between the ends, and only one slit is formed at each end, and the center is It is configured to be solid.
- a compressor is provided with said permanent-magnet-type rotary electric motor, and the compression mechanism part driven by the said permanent-magnet-type rotary electric motor.
- the sectional view which cut the permanent magnet type rotary motor in this embodiment by the plane which intersects perpendicularly with the axis of rotation is shown.
- the enlarged view of the outer core part vicinity of the rotor in this embodiment is shown. It is a figure which shows the comparison with the torque waveform of the electric motor in this embodiment, and the torque waveform of the electric motor of conventional structure.
- the sectional view of the compressor provided with the electric motor in this embodiment is shown.
- FIG. 1 shows a cross-sectional view of a permanent magnet type rotary motor 100 (hereinafter, simply referred to as a motor 100) in the present embodiment, taken along a plane orthogonal to its rotation axis.
- FIG. 2 shows an enlarged view around the outer core portion 13D of the rotor 10. As shown in FIG.
- the motor 100 mainly includes a stator 1 and a rotor 10.
- the stator 1 has a cylindrical yoke 6 and a plurality of teeth 3, and a plurality of slots 3 are formed by the plurality of teeth 3.
- An armature winding (not shown) is wound so as to surround each tooth 3 and disposed in the slot portion 2.
- the rotor 10 is composed of a rotor core 13 and a plurality of (six in the present embodiment) permanent magnets 11. In the vicinity of the outer peripheral surface of the rotor core 13, a plurality of magnet insertion holes 13c are formed. The plate-like permanent magnet 11 is inserted into each of the magnet insertion holes 13c. The permanent magnet 11 constitutes a magnetic pole. In the rotor core 13, concave portions 12 are formed between the adjacent permanent magnets 11 (magnet insertion holes 13 c).
- the rotor core 13 has an outer core portion 13D located on the outer diameter side of the magnet insertion hole 13c (permanent magnet 11).
- a pair of slits 13a is formed at an end portion 13D1 (FIG. 2) located on the outer diameter side of both end portions in the width direction of the permanent magnet 11. That is, only one slit 13a is formed at each end 13D1.
- the central portion 13D2 (FIG. 2) located between the pair of end portions 13D1 is solid.
- the teeth 3 are provided on the tip end side of the teeth base 7 extending radially inward from the yoke 6 and the teeth arc of the teeth base 7 and extend along the circumferential direction.
- the teeth arc portion 4 includes a teeth center portion 8 whose inner circumferential surface has an arc shape, and a pair of teeth enlarged portions 5.
- the pair of teeth enlargement parts 5 are located at both ends in the circumferential direction of the teeth center part 8. The distance between each tooth enlarged portion 5 and the outer core portion 13D is larger than the distance between the teeth central portion 8 and the outer core portion 13D.
- the inner surface of the teeth expanding portion 5 is configured such that the distance from the outer core portion 13D increases as going outward in the circumferential direction.
- the inner surface of the tooth enlargement 5 is located radially outward of the inner surface of the tooth central portion 8.
- one teeth enlarged portion 5 of teeth arc portion 4 faces one slit 13a of outer core portion 13D, and the other of teeth arc portion 4
- the teeth expanding portion 5 is configured to face the other slit 13a of the outer core portion 13D.
- the outer core portion 13D of the rotor 10 has a rotor arc portion 14 and a pair of rotor enlarged portions 15 at an outer end portion in the radial direction.
- the outer circumferential surface of the rotor arc portion 14 opposed to the teeth 3 has an arc shape.
- Each rotor enlarged portion 15 is located between the slit 13 a and the recess 12.
- the distance between each rotor enlarged portion 15 and the teeth arc portion 4 is larger than the distance between the rotor arc portion 14 and the teeth arc portion 4.
- the outer surface of the rotor enlarged portion 15 is configured such that the distance from the tooth arc 4 increases as it goes outward in the circumferential direction.
- the outer surface of the rotor enlarged portion 15 is located radially inward of the outer surface of the rotor arc portion 14.
- the concave portion 12 is formed between the adjacent permanent magnets 11 (magnetic poles), the short circuit of the field magnetic flux between the adjacent permanent magnets 11 can be prevented. it can.
- a pair of slits 13a is formed at end portions 13D1 corresponding to both widthwise end portions of the permanent magnet 11.
- the central portion 13D2 positioned between the pair of slits 13a is solid.
- a pair of slits 13a is formed in the outer core portion 13D of the rotor 10, and a central portion 13D2 located between the pair of slits 13a is solid. Therefore, the formability of the rotor core 13 can be easily maintained without requiring many precision cutting tools at the time of manufacturing the rotor core 13.
- teeth arc portion 4 has teeth central portion 8 and a pair of teeth enlarged portions 5 located at both ends in the circumferential direction of tooth central portion 8, and each tooth expanded portion 5 and outer iron core 13D portion The distance is configured to be larger than the distance between the teeth central portion 8 and the outer core portion 13D.
- one teeth enlarged portion 5 of teeth arc portion 4 faces one slit 13a of outer core portion 13D, and the other of teeth arc portion 4
- the teeth expanding portion 5 is configured to face the other slit 13a of the outer core portion 13D.
- the outer core portion 13D has the rotor arc portion 14 and a pair of rotor enlarged portions 15 positioned at both ends in the circumferential direction of the rotor arc portion 14 at the radial outer end portion, and
- the portion 15 is located between the slit 13 a and the recess 12, and the distance between each rotor enlarged portion 15 and the teeth arc portion 4 is larger than the distance between the rotor arc portion 14 and the teeth arc portion 4. . Therefore, the magnetic flux distribution can be further smoothed, and torque fluctuation can be suppressed to a low level.
- FIG. 3 is a diagram showing a comparison between the torque waveform of the electric motor 100 in the present embodiment and the torque waveform of the permanent magnet type rotary motor of the conventional configuration (the slit 13a, the recess 12 and the like are not formed).
- FIG. 3 shows torque fluctuation under predetermined operating conditions (rotational speed, shaft output), the horizontal axis indicates time, and the vertical axis indicates torque.
- a solid line 101 indicates a torque waveform of the motor 100 in the present embodiment
- a dotted line 102 indicates a torque waveform of the motor of the conventional configuration.
- the amplitude of the torque fluctuation is smaller, and the distortion of the waveform is smaller. Therefore, according to the motor 100 of the present embodiment, it is possible to reduce the vibration and noise caused by the torque fluctuation.
- FIG. 4 shows a cross-sectional view of a compressor 200 provided with a motor 100. As shown in FIG. 4
- the compressor 200 includes a cylindrical case 203 also serving as a pressure vessel, an electric motor 100, a drive shaft 202, and a compression mechanism portion 201.
- the stator 1 is supported by a case 203.
- a drive shaft 202 is attached to the rotor 10.
- the drive shaft 202 is rotatably supported by the case 203.
- the compression mechanism unit 201 is a scroll-type compression mechanism unit. In the compressor 200, the rotation of the rotor 10 is transmitted to the compression mechanism unit 201 via the drive shaft 202, the gas is compressed by the compression mechanism unit 201, and the compressed gas is discharged out of the case 203.
- the compressor 200 includes the motor 100 with reduced torque fluctuation according to this embodiment, and drives the compression mechanism unit 201 by the motor 100 to improve the efficiency of the compressor 200 and reduce the vibration and noise. Can.
- the motor 100 has six poles and nine slots, but the number of magnetic poles and the number of slots are not limited thereto.
- the inner surface of the teeth expanding portion 5 is configured such that the distance from the outer core portion 13D increases as going outward in the circumferential direction.
- the distance between each tooth enlarged portion 5 and the outer core portion 13D may be larger than the distance between the tooth center portion 8 and the outer core portion 13D, and the inner surface of the tooth expanded portion 5 is circumferentially Along the distance to the outer core portion 13D may be constant.
- the outer surface of the rotor enlarged portion 15 is configured such that the distance from the tooth arc 4 increases as going outward in the circumferential direction.
- the distance between each rotor enlarged portion 15 and teeth arc portion 4 may be configured to be larger than the distance between rotor arc portion 14 and teeth arc portion 4, and the outer surface of rotor enlarged portion 15 is in the circumferential direction
- the distance between the tooth arc 4 and the teeth arc 4 may be constant.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Provided is a permanent magnet-type rotating electric motor achieving an improvement in efficiency and a reduction in noise and vibration while easily maintaining the formability of a rotor core and also provided is a compressor using the permanent magnet-type rotating electric motor. A rotor core 13 has an outside core portion 13D located on the outer diameter side of each magnet insertion hole 13c. The rotor core 13 has a recess portion 12 formed between adjacent magnet insertion holes 13c. The outside core portion 13D has end portions 13D1 located at both ends of a permanent magnet 11 in the width direction on the outer diameter side and a central portion 13D2 located between the end portions 13D1, wherein only one slit 13a is formed in each of the end portions 13D1 and the central portion 13D2 is formed to be solid.
Description
本発明は、永久磁石式回転電動機およびこれを用いた圧縮機に関する。
The present invention relates to a permanent magnet rotary motor and a compressor using the same.
永久磁石式回転電機およびこれを用いた圧縮機の従来技術としては、例えば特許文献１に記載のものがある。特許文献１に記載の永久磁石式回転電機では、回転子鉄心の永久磁石挿入孔の外側にスリットを複数個形成し、各スリット側面の延長線が固定子側の磁極中心線上の一点で交わるようにしている。これにより、モータ電流を安定させ、特に高速回転時の運転制御性を向上させ、効率改善、騒音低減にも効果が得られるとしている。
As a prior art of a permanent-magnet-type rotary electric machine and a compressor using the same, there is a thing of patent document 1, for example. In the permanent magnet type rotary electric machine described in Patent Document 1, a plurality of slits are formed outside the permanent magnet insertion holes of the rotor core, and extension lines of the side surfaces of the slits intersect at one point of the magnetic pole center line on the stator side. I have to. As a result, the motor current is stabilized, operation controllability at high speed rotation in particular is improved, and an effect can be obtained to improve the efficiency and reduce the noise.
しかし、永久磁石の界磁磁束を有効に使うため、永久磁石は可能な限り回転子外径部に近づけて配置される。このため、回転子鉄心のうち、永久磁石挿入孔より固定子側に位置する部分は、非常に小さくなる。このため、特許文献１に記載の効果を得るために、回転子鉄心のうち永久磁石挿入孔より固定子側に位置する部分に、複数個の小さなスリットを形成している。複数個の小さなスリットが形成された回転子鉄心をプレス機にて成形する際には、多くの精密刃具が必要となる。さらには刃具のメンテナンス周期を短くして精密成型を維持する必要がある。
However, in order to effectively use the field flux of the permanent magnet, the permanent magnet is disposed as close to the rotor outer diameter as possible. For this reason, the part located in the stator side from a permanent magnet insertion hole among rotor iron cores becomes very small. For this reason, in order to obtain the effect described in Patent Document 1, a plurality of small slits are formed in a portion of the rotor core located closer to the stator than the permanent magnet insertion hole. When forming a rotor core having a plurality of small slits in a press, many precision cutting tools are required. Furthermore, it is necessary to shorten the maintenance cycle of the cutting tool and maintain precision molding.
そこで、本発明は、回転子鉄心の成形性を容易に維持しつつ、効率の向上、騒音および振動の低減を図った永久磁石式回転電動機およびこれを用いた圧縮機を提供することを目的とする。
In view of the foregoing, it is an object of the present invention to provide a permanent magnet type rotary motor and compressor using the same, which can improve efficiency and reduce noise and vibration while easily maintaining the formability of a rotor core. Do.
上記目的を達成するため本発明の永久磁石式回転電動機は、ヨークと、前記ヨークからその径方向の内方に向かって延び電機子巻線が巻回される複数のティースと、を有する固定子と、外周表面近傍に複数の磁石挿入孔が形成された回転子鉄心と、前記複数の磁石挿入孔に挿入される複数の板状の永久磁石とを備える回転子と、を備え、前記回転子鉄心は、各磁石挿入孔の外径側に位置する外側鉄心部を有し、前記回転子鉄心において、隣り合う前記磁石挿入孔の間には凹部が形成され、前記外側鉄心部は、前記永久磁石の幅方向の両端部の外径側に位置する端部と、前記端部の間に位置する中央部とを有し、各端部には、一つのスリットのみが形成され、中央部は中実に構成されている。
In order to achieve the above object, a permanent magnet rotary motor according to the present invention comprises: a stator having a yoke; and a plurality of teeth extending radially inward from the yoke and around which armature windings are wound. And a rotor including a rotor core having a plurality of magnet insertion holes formed in the vicinity of the outer peripheral surface, and a plurality of plate-like permanent magnets inserted into the plurality of magnet insertion holes, The iron core has an outer iron core located on the outer diameter side of each magnet insertion hole, and a recess is formed between the adjacent magnet insertion holes in the rotor iron core, and the outer iron core is the permanent magnet It has an end located on the outer diameter side of both ends in the width direction of the magnet, and a center located between the ends, and only one slit is formed at each end, and the center is It is configured to be solid.
また、圧縮機は、上記の永久磁石式回転電動機と、前記永久磁石式回転電動機によって駆動される圧縮機構部と、を備える。
Moreover, a compressor is provided with said permanent-magnet-type rotary electric motor, and the compression mechanism part driven by the said permanent-magnet-type rotary electric motor.
本発明によれば、回転子鉄心の成形性を容易に維持しつつ、効率の向上、騒音および振動の低減を図った永久磁石式回転電動機およびこれを用いた圧縮機を提供することができる。
According to the present invention, it is possible to provide a permanent magnet type rotary motor and compressor using the same, which can improve efficiency and reduce noise and vibration while easily maintaining the formability of the rotor core.
以下、本発明の実施の形態に係る永久磁石式回転電動機およびこれを用いた圧縮機について、図面を参照して説明する。
Hereinafter, a permanent magnet type rotary motor and a compressor using the same according to an embodiment of the present invention will be described with reference to the drawings.
図１は、本実施形態における永久磁石式回転電動機１００（以下、単に電動機１００とする）をその回転軸に直交する平面で切った断面図を示している。図２は、回転子１０の外側鉄心部１３Ｄ付近の拡大図を示す。
FIG. 1 shows a cross-sectional view of a permanent magnet type rotary motor 100 (hereinafter, simply referred to as a motor 100) in the present embodiment, taken along a plane orthogonal to its rotation axis. FIG. 2 shows an enlarged view around the outer core portion 13D of the rotor 10. As shown in FIG.
図１に示すように、電動機１００は、固定子１と、回転子１０とを主に備える。固定子１は、円筒状のヨーク６と、複数のティース３を有し、複数のティース３により、複数のスロット部２が形成されている。図示せぬ電機子巻線が、各ティース３を取り囲むように巻回され、スロット部２内に配される。
As shown in FIG. 1, the motor 100 mainly includes a stator 1 and a rotor 10. The stator 1 has a cylindrical yoke 6 and a plurality of teeth 3, and a plurality of slots 3 are formed by the plurality of teeth 3. An armature winding (not shown) is wound so as to surround each tooth 3 and disposed in the slot portion 2.
回転子１０は、回転子鉄心１３と複数（本実施形態では６枚）の永久磁石１１とにより構成される。回転子鉄心１３の外周表面近傍には、複数の磁石挿入孔１３ｃが形成されている。各磁石挿入孔１３ｃに対し、板状の永久磁石１１が挿入されている。永久磁石１１により、磁極が構成される。回転子鉄心１３において、隣り合う永久磁石１１（磁石挿入孔１３ｃ）の間には、凹部１２が形成されている。
The rotor 10 is composed of a rotor core 13 and a plurality of (six in the present embodiment) permanent magnets 11. In the vicinity of the outer peripheral surface of the rotor core 13, a plurality of magnet insertion holes 13c are formed. The plate-like permanent magnet 11 is inserted into each of the magnet insertion holes 13c. The permanent magnet 11 constitutes a magnetic pole. In the rotor core 13, concave portions 12 are formed between the adjacent permanent magnets 11 (magnet insertion holes 13 c).
回転子鉄心１３は、磁石挿入孔１３ｃ（永久磁石１１）の外径側に位置する外側鉄心部１３Ｄを有する。外側鉄心部１３Ｄにおいて、永久磁石１１の幅方向両端部の外径側に位置する端部１３Ｄ１（図２）に、一対のスリット１３ａが形成されている。すなわち、各端部１３Ｄ１に一つのスリット１３ａのみが形成されている。また、外側鉄心部１３Ｄにおいて、一対の端部１３Ｄ１の間に位置する中央部１３Ｄ２（図２）は中実に構成されている。
The rotor core 13 has an outer core portion 13D located on the outer diameter side of the magnet insertion hole 13c (permanent magnet 11). In the outer core portion 13D, a pair of slits 13a is formed at an end portion 13D1 (FIG. 2) located on the outer diameter side of both end portions in the width direction of the permanent magnet 11. That is, only one slit 13a is formed at each end 13D1. Further, in the outer core portion 13D, the central portion 13D2 (FIG. 2) located between the pair of end portions 13D1 is solid.
図１、図２に示すように、ティース３は、ヨーク６から径方向の内方に向かって延びるティース基部７と、ティース基部７の先端側に設けられ、円周方向に沿って延びるティース円弧部４とを備える。ティース円弧部４は、内周面が円弧状をなすティース中央部８と、一対のティース拡大部５を備える。一対のティース拡大部５は、ティース中央部８の円周方向の両端に位置している。各ティース拡大部５と外側鉄心部１３Ｄとの距離は、ティース中央部８と外側鉄心部１３Ｄとの距離よりも大きく構成されている。本実施の形態では、ティース拡大部５の内面は、円周方向の外方に向かうにつれて、外側鉄心部１３Ｄからの距離が大きくなるように構成されている。換言すれば、ティース拡大部５の内面は、ティース中央部８の内面よりも径方向において外側に位置している。
As shown in FIGS. 1 and 2, the teeth 3 are provided on the tip end side of the teeth base 7 extending radially inward from the yoke 6 and the teeth arc of the teeth base 7 and extend along the circumferential direction. And 4 are provided. The teeth arc portion 4 includes a teeth center portion 8 whose inner circumferential surface has an arc shape, and a pair of teeth enlarged portions 5. The pair of teeth enlargement parts 5 are located at both ends in the circumferential direction of the teeth center part 8. The distance between each tooth enlarged portion 5 and the outer core portion 13D is larger than the distance between the teeth central portion 8 and the outer core portion 13D. In the present embodiment, the inner surface of the teeth expanding portion 5 is configured such that the distance from the outer core portion 13D increases as going outward in the circumferential direction. In other words, the inner surface of the tooth enlargement 5 is located radially outward of the inner surface of the tooth central portion 8.
ティース３と外側鉄心部１３Ｄとが径方向に並んだ状態において、ティース円弧部４の一方のティース拡大部５が、外側鉄心部１３Ｄの一方のスリット１３ａに対向し、ティース円弧部４の他方のティース拡大部５が、外側鉄心部１３Ｄの他方のスリット１３ａに対向するように構成されている。
In a state where teeth 3 and outer core portion 13D are aligned in the radial direction, one teeth enlarged portion 5 of teeth arc portion 4 faces one slit 13a of outer core portion 13D, and the other of teeth arc portion 4 The teeth expanding portion 5 is configured to face the other slit 13a of the outer core portion 13D.
回転子１０の外側鉄心部１３Ｄは、径方向の外端部に、ロータ円弧部１４と、一対のロータ拡大部１５とを有する。ロータ円弧部１４は、ティース３に対向する外周面が円弧状をなしている。各ロータ拡大部１５は、スリット１３ａと凹部１２との間に位置している。各ロータ拡大部１５とティース円弧部４との距離は、ロータ円弧部１４とティース円弧部４との距離よりも大きく構成されている。本実施の形態では、ロータ拡大部１５の外面は、円周方向の外方に向かうにつれて、ティース円弧部４からの距離が大きくなるように構成されている。換言すれば、ロータ拡大部１５の外面は、ロータ円弧部１４の外面よりも径方向において内側に位置している。
The outer core portion 13D of the rotor 10 has a rotor arc portion 14 and a pair of rotor enlarged portions 15 at an outer end portion in the radial direction. The outer circumferential surface of the rotor arc portion 14 opposed to the teeth 3 has an arc shape. Each rotor enlarged portion 15 is located between the slit 13 a and the recess 12. The distance between each rotor enlarged portion 15 and the teeth arc portion 4 is larger than the distance between the rotor arc portion 14 and the teeth arc portion 4. In the present embodiment, the outer surface of the rotor enlarged portion 15 is configured such that the distance from the tooth arc 4 increases as it goes outward in the circumferential direction. In other words, the outer surface of the rotor enlarged portion 15 is located radially inward of the outer surface of the rotor arc portion 14.
以上のように、回転子鉄心１３において、隣り合う永久磁石１１（磁極）の間に、凹部１２が形成されているので、隣り合う永久磁石１１間での界磁磁束の短絡を防止することができる。回転子１０の外側鉄心部１３Ｄには、永久磁石１１の幅方向両端部に対応する端部１３Ｄ１に、一対のスリット１３ａが形成されている。外側鉄心部１３Ｄにおいて、一対のスリット１３ａの間に位置する中央部１３Ｄ２は中実に構成されている。これにより、界磁磁束の短絡をさらに防止できるとともに、磁束分布の円滑化を図ることができ、電機子反作用の低減を図ることができる。その結果、電動機１００の効率向上が可能となる。
As described above, in the rotor core 13, since the concave portion 12 is formed between the adjacent permanent magnets 11 (magnetic poles), the short circuit of the field magnetic flux between the adjacent permanent magnets 11 can be prevented. it can. In the outer core portion 13D of the rotor 10, a pair of slits 13a is formed at end portions 13D1 corresponding to both widthwise end portions of the permanent magnet 11. In the outer core portion 13D, the central portion 13D2 positioned between the pair of slits 13a is solid. Thereby, a short circuit of the field magnetic flux can be further prevented, and the magnetic flux distribution can be smoothed, and the armature reaction can be reduced. As a result, the efficiency of the motor 100 can be improved.
また、回転子１０の外側鉄心部１３Ｄには、一対のスリット１３ａが形成され、一対のスリット１３ａの間に位置する中央部１３Ｄ２は中実に構成されている。よって、回転子鉄心１３の製造時に多くの精密刃具を必要とせず、回転子鉄心１３の成形性を容易に維持することができる。
Further, a pair of slits 13a is formed in the outer core portion 13D of the rotor 10, and a central portion 13D2 located between the pair of slits 13a is solid. Therefore, the formability of the rotor core 13 can be easily maintained without requiring many precision cutting tools at the time of manufacturing the rotor core 13.
また、ティース円弧部４は、ティース中央部８と、ティース中央部８の円周方向の両端に位置する一対のティース拡大部５とを有し、各ティース拡大部５と外側鉄心１３Ｄ部との距離は、ティース中央部８と外側鉄心部１３Ｄとの距離よりも大きく構成されている。ティース３と外側鉄心部１３Ｄとが径方向に並んだ状態において、ティース円弧部４の一方のティース拡大部５が、外側鉄心部１３Ｄの一方のスリット１３ａに対向し、ティース円弧部４の他方のティース拡大部５が、外側鉄心部１３Ｄの他方のスリット１３ａに対向するように構成されている。
In addition, teeth arc portion 4 has teeth central portion 8 and a pair of teeth enlarged portions 5 located at both ends in the circumferential direction of tooth central portion 8, and each tooth expanded portion 5 and outer iron core 13D portion The distance is configured to be larger than the distance between the teeth central portion 8 and the outer core portion 13D. In a state where teeth 3 and outer core portion 13D are aligned in the radial direction, one teeth enlarged portion 5 of teeth arc portion 4 faces one slit 13a of outer core portion 13D, and the other of teeth arc portion 4 The teeth expanding portion 5 is configured to face the other slit 13a of the outer core portion 13D.
これにより、ティース円弧部４の円周方向の端部に界磁磁束が集中することを防止することができるので、磁束分布の円滑化を図ることができ、トルク変動も低く抑えることが可能である。すなわち、凹部１２とスリット１３ａとの組み合わせのみでは、界磁磁束がティース円弧部４の円周方向の端部に集中することで、磁束分布が円滑に変化し難くなってしまい、トルク変動が大きくなってしまう可能性があるが、これを防止することができる。
As a result, it is possible to prevent concentration of the field magnetic flux at the circumferential end of the tooth arc 4, so that the flux distribution can be smoothed and torque fluctuation can be suppressed to a low level. is there. That is, only by the combination of the recess 12 and the slit 13a, the field magnetic flux is concentrated at the circumferential end of the teeth arc portion 4, so that the magnetic flux distribution hardly changes smoothly, and the torque fluctuation is large. It is possible to prevent this.
また、外側鉄心部１３Ｄは、径方向の外端部に、ロータ円弧部１４と、ロータ円弧部１４の円周方向の両端に位置する一対のロータ拡大部１５と、を有し、 各ロータ拡大部１５は、スリット１３ａと凹部１２との間に位置し、各ロータ拡大部１５とティース円弧部４との距離は、ロータ円弧部１４とティース円弧部４との距離よりも大きく構成されている。このため、さらに磁束分布の円滑化を図ることができ，トルク変動を低く抑えることができる。
Further, the outer core portion 13D has the rotor arc portion 14 and a pair of rotor enlarged portions 15 positioned at both ends in the circumferential direction of the rotor arc portion 14 at the radial outer end portion, and The portion 15 is located between the slit 13 a and the recess 12, and the distance between each rotor enlarged portion 15 and the teeth arc portion 4 is larger than the distance between the rotor arc portion 14 and the teeth arc portion 4. . Therefore, the magnetic flux distribution can be further smoothed, and torque fluctuation can be suppressed to a low level.
図３は、本実施形態における電動機１００のトルク波形と、従来の構成（スリット１３ａ、凹部１２等が形成されていない）の永久磁石式回転電動機のトルク波形との比較を示す図である。図３では、所定の運転条件（回転数、軸出力）におけるトルク変動を示しており、横軸が時間、縦軸がトルクを示している。図３において、実線１０１は、本実施形態における電動機１００のトルク波形を示し、点線１０２は、従来の構成の電動機のトルク波形を示している。
FIG. 3 is a diagram showing a comparison between the torque waveform of the electric motor 100 in the present embodiment and the torque waveform of the permanent magnet type rotary motor of the conventional configuration (the slit 13a, the recess 12 and the like are not formed). FIG. 3 shows torque fluctuation under predetermined operating conditions (rotational speed, shaft output), the horizontal axis indicates time, and the vertical axis indicates torque. In FIG. 3, a solid line 101 indicates a torque waveform of the motor 100 in the present embodiment, and a dotted line 102 indicates a torque waveform of the motor of the conventional configuration.
図３に示すように、本実施形態における電動機１００のトルク波形の方が、トルク変動の振幅が小さくなり、かつ波形のひずみが小さくなっている。よって、本実施形態の電動機１００によれば、トルク変動に起因する振動や騒音を低減させることができる。
As shown in FIG. 3, in the torque waveform of the motor 100 in the present embodiment, the amplitude of the torque fluctuation is smaller, and the distortion of the waveform is smaller. Therefore, according to the motor 100 of the present embodiment, it is possible to reduce the vibration and noise caused by the torque fluctuation.
図４は、電動機１００を備える圧縮機２００の断面図を示している。
FIG. 4 shows a cross-sectional view of a compressor 200 provided with a motor 100. As shown in FIG.
圧縮機２００は、圧力容器を兼ねた筒状のケース２０３と、電動機１００と、駆動軸２０２と、圧縮機構部２０１とを備える。
The compressor 200 includes a cylindrical case 203 also serving as a pressure vessel, an electric motor 100, a drive shaft 202, and a compression mechanism portion 201.
固定子１は、ケース２０３に支持されている。回転子１０には駆動軸２０２が取り付けられている。駆動軸２０２はケース２０３に回転可能に支持されている。圧縮機構部２０１は、スクロール式の圧縮機構部である。圧縮機２００では、回転子１０の回転が駆動軸２０２を介して、圧縮機構部２０１に伝達され、圧縮機構部２０１でガスが圧縮され、圧縮ガスはケース２０３外に排出される。
The stator 1 is supported by a case 203. A drive shaft 202 is attached to the rotor 10. The drive shaft 202 is rotatably supported by the case 203. The compression mechanism unit 201 is a scroll-type compression mechanism unit. In the compressor 200, the rotation of the rotor 10 is transmitted to the compression mechanism unit 201 via the drive shaft 202, the gas is compressed by the compression mechanism unit 201, and the compressed gas is discharged out of the case 203.
このように、電動機１００のトルクは、駆動軸２０２を介して圧縮機構部２０１に直接伝達されるため、電動機１００のトルク変動は、圧縮機２００全体の振動および騒音の原因となる。しかし、圧縮機２００が本実施形態のトルク変動を低減した電動機１００を備え、圧縮機構部２０１を電動機１００により駆動することにより、圧縮機２００において、効率を向上させ、振動および騒音を低減させることができる。
As described above, since the torque of the motor 100 is directly transmitted to the compression mechanism unit 201 via the drive shaft 202, the torque fluctuation of the motor 100 causes the vibration and noise of the entire compressor 200. However, the compressor 200 includes the motor 100 with reduced torque fluctuation according to this embodiment, and drives the compression mechanism unit 201 by the motor 100 to improve the efficiency of the compressor 200 and reduce the vibration and noise. Can.
なお、本発明は、上述した実施例に限定されない。当業者であれば、本発明の範囲内で、種々の追加や変更等を行うことができる。
The present invention is not limited to the embodiments described above. Those skilled in the art can make various additions and modifications within the scope of the present invention.
例えば、上記の実施形態において、電動機１００は、６極、９スロットであったが、磁極の数およびスロット数はこれに限らない。また、ティース拡大部５の内面は、円周方向の外方に向かうにつれて、外側鉄心部１３Ｄからの距離が大きくなるように構成されていた。しかし、各ティース拡大部５と外側鉄心部１３Ｄとの距離が、ティース中央部８と外側鉄心部１３Ｄとの距離よりも大きく構成されていれば良く、ティース拡大部５の内面は、円周方向に沿って、外側鉄心部１３Ｄとの距離が一定であっても良い。
For example, in the above embodiment, the motor 100 has six poles and nine slots, but the number of magnetic poles and the number of slots are not limited thereto. In addition, the inner surface of the teeth expanding portion 5 is configured such that the distance from the outer core portion 13D increases as going outward in the circumferential direction. However, the distance between each tooth enlarged portion 5 and the outer core portion 13D may be larger than the distance between the tooth center portion 8 and the outer core portion 13D, and the inner surface of the tooth expanded portion 5 is circumferentially Along the distance to the outer core portion 13D may be constant.
同様に、ロータ拡大部１５の外面は、円周方向の外方に向かうにつれて、ティース円弧部４からの距離が大きくなるように構成されていた。しかし、各ロータ拡大部１５とティース円弧部４との距離は、ロータ円弧部１４とティース円弧部４との距離よりも大きく構成されていれば良く、ロータ拡大部１５の外面は、円周方向に沿って、ティース円弧部４との距離が一定であっても良い。
Similarly, the outer surface of the rotor enlarged portion 15 is configured such that the distance from the tooth arc 4 increases as going outward in the circumferential direction. However, the distance between each rotor enlarged portion 15 and teeth arc portion 4 may be configured to be larger than the distance between rotor arc portion 14 and teeth arc portion 4, and the outer surface of rotor enlarged portion 15 is in the circumferential direction The distance between the tooth arc 4 and the teeth arc 4 may be constant.
１ 固定子
３ ティース
４ ティース円弧部
５ ティース拡大部
６ ヨーク
７ ティース基部
８ ティース中央部
１０ 回転子
１２ 凹部
１１ 永久磁石
１３ 回転子鉄心
１３ａ スリット
１３ｃ 磁石挿入孔
１３Ｄ 外側鉄心部
１３Ｄ１ 端部
１３Ｄ２ 中央部
１４ ロータ円弧部
１５ ロータ拡大部
１００ 永久磁石式回転電動機
２００ 圧縮機
２０１ 圧縮機構部
1Stator 3 Tees 4 Teeth arc portion 5 Teeth enlargement portion 6 Yoke 7 Teeth base portion 8 Teeth center portion 10 Rotor 12 Recess 11 Permanent magnet 13 Rotor core 13a Slit 13c Magnet insertion hole 13D Outer core portion 13D1 End portion 13D2 Center portion 14 Rotor Arc Part 15 Rotor Enlarged Part 100 Permanent Magnet Type Rotary Motor 200 Compressor 201 Compression Mechanism Part
３ ティース
４ ティース円弧部
５ ティース拡大部
６ ヨーク
７ ティース基部
８ ティース中央部
１０ 回転子
１２ 凹部
１１ 永久磁石
１３ 回転子鉄心
１３ａ スリット
１３ｃ 磁石挿入孔
１３Ｄ 外側鉄心部
１３Ｄ１ 端部
１３Ｄ２ 中央部
１４ ロータ円弧部
１５ ロータ拡大部
１００ 永久磁石式回転電動機
２００ 圧縮機
２０１ 圧縮機構部
1
Claims (4)
- ヨークと、前記ヨークからその径方向の内方に向かって延び電機子巻線が巻回される複数のティースと、を有する固定子と、
外周表面近傍に複数の磁石挿入孔が形成された回転子鉄心と、前記複数の磁石挿入孔に挿入される複数の板状の永久磁石とを備える回転子と、を備え、
前記回転子鉄心は、各磁石挿入孔の外径側に位置する外側鉄心部を有し、
前記回転子鉄心において、隣り合う前記磁石挿入孔の間には凹部が形成され、
前記外側鉄心部は、前記永久磁石の幅方向の両端部の外径側に位置する端部と、前記端部の間に位置する中央部とを有し、
各端部には、一つのスリットのみが形成され、中央部は中実に構成されている、永久磁石式回転電動機。 A stator comprising: a yoke; and a plurality of teeth extending radially inward from the yoke and around which an armature winding is wound.
A rotor including a rotor core having a plurality of magnet insertion holes formed in the vicinity of an outer peripheral surface, and a plurality of plate-like permanent magnets inserted into the plurality of magnet insertion holes;
The rotor core has an outer core portion located on the outer diameter side of each magnet insertion hole,
In the rotor core, a recess is formed between the adjacent magnet insertion holes,
The outer core portion has an end portion positioned on the outer diameter side of both end portions in the width direction of the permanent magnet, and a central portion positioned between the end portions.
A permanent magnet rotary motor, in which only one slit is formed at each end and the center is solid. - 各ティースは、前記ヨークからその径方向の内方に向かって延びるティース基部と、前記ティース基部の先端側に設けられ、円周方向に沿って延びるティース円弧部と、を有し、
前記ティース円弧部は、ティース中央部と、前記ティース中央部の前記円周方向の両端に位置する一対のティース拡大部と、を有し、
各ティース拡大部と前記外側鉄心部との距離は、前記ティース中央部と前記外側鉄心部との距離よりも大きく構成され、
前記ティースと前記外側鉄心部とが径方向に並んだ状態において、前記ティース円弧部の一方の前記ティース拡大部が、前記外側鉄心部の一方の前記スリットに対向し、前記ティース円弧部の他方の前記ティース拡大部が、前記外側鉄心部の他方の前記スリットに対向するように構成されている、請求項１に記載の永久磁石式回転電動機。 Each tooth has a tooth base extending radially inward from the yoke, and a tooth arc portion provided on the tip side of the tooth base and extending in the circumferential direction,
The teeth arc portion has a teeth center portion, and a pair of teeth enlargement portions located at both ends in the circumferential direction of the teeth center portion,
The distance between each tooth enlarged portion and the outer core portion is larger than the distance between the center portion of the teeth and the outer core portion,
In the state in which the teeth and the outer core portion are arranged in the radial direction, one of the teeth expanding portions of the teeth arc portion faces one of the slits of the outer core portion, and the other of the teeth arc portions is The permanent magnet rotary motor according to claim 1, wherein the teeth enlargement portion is configured to face the other slit of the outer core portion. - 前記外側鉄心部は、径方向の外端部に、ロータ円弧部と、前記ロータ円弧部の前記円周方向の両端に位置する一対のロータ拡大部と、を有し、
各ロータ拡大部は、前記スリットと前記凹部との間に位置し、各ロータ拡大部と前記ティース円弧部との距離は、前記ロータ円弧部と前記ティース円弧部との距離よりも大きく構成されている、請求項１に記載の永久磁石式回転電動機。 The outer core portion has, at an outer end portion in the radial direction, a rotor arc portion and a pair of rotor enlarged portions positioned at both ends in the circumferential direction of the rotor arc portion,
Each rotor enlargement is located between the slit and the recess, and the distance between each rotor enlargement and the teeth arc is configured to be larger than the distance between the rotor arc and the teeth arc. The permanent magnet rotary motor according to claim 1. - 請求項１～３のいずれか一項に記載の永久磁石式回転電動機と、
前記永久磁石式回転電動機によって駆動される圧縮機構部と、を備える、圧縮機。
A permanent magnet type rotary motor according to any one of claims 1 to 3;
A compressor mechanism unit driven by the permanent magnet type rotary motor.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2015/075482 WO2017042886A1 (en) | 2015-09-08 | 2015-09-08 | Permanent magnet-type rotating electric motor and compressor using same |
| CN201580082239.0A CN107852048B (en) | 2015-09-08 | 2015-09-08 | Permanent magnet type electric rotating motivation and the compressor for using it |
| JP2017538758A JP6420488B2 (en) | 2015-09-08 | 2015-09-08 | Permanent magnet type rotary electric motor and compressor using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2015/075482 WO2017042886A1 (en) | 2015-09-08 | 2015-09-08 | Permanent magnet-type rotating electric motor and compressor using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2017042886A1 true WO2017042886A1 (en) | 2017-03-16 |
Family
ID=58240636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2015/075482 WO2017042886A1 (en) | 2015-09-08 | 2015-09-08 | Permanent magnet-type rotating electric motor and compressor using same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6420488B2 (en) |
| CN (1) | CN107852048B (en) |
| WO (1) | WO2017042886A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7172979B2 (en) * | 2019-12-25 | 2022-11-16 | トヨタ自動車株式会社 | Rotating electric machine |
| JP2022067776A (en) * | 2020-10-21 | 2022-05-09 | 瀋陽中航機電三洋制冷設備有限公司 | Dynamo-electric motor and rotary compressor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002291179A (en) * | 2001-03-27 | 2002-10-04 | Matsushita Seiko Co Ltd | Stator core of half-pitch capacitor induction motor |
| US6847144B1 (en) * | 2003-12-10 | 2005-01-25 | Industrial Technology Research Institute | Permanent magnet rotor assembly for interior permanent magnet electric motor |
| JP2005027422A (en) * | 2003-07-02 | 2005-01-27 | Hitachi Ltd | Permanent magnet type rotating electric machine and electric compressor using the same |
| JP2008029095A (en) * | 2006-07-20 | 2008-02-07 | Hitachi Industrial Equipment Systems Co Ltd | Permanent magnet type dynamo-electric machine and compressor using the same |
| US20090140590A1 (en) * | 2007-12-04 | 2009-06-04 | Industrial Technology Research Institute | Permanent magnet type magnetic pole core structure capable of minimizing cogging torque for rotating electric machine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3787756B2 (en) * | 2000-08-29 | 2006-06-21 | 株式会社日立製作所 | Permanent magnet rotating electric machine |
| CN1278472C (en) * | 2002-07-12 | 2006-10-04 | 株式会社日立产机系统 | Permanent magnet type rotary motor and compressor using same |
| KR101478838B1 (en) * | 2008-01-22 | 2015-01-05 | 엘지전자 주식회사 | Fan motor, BLDC motor and rotator for the same |
| EP2083503A3 (en) * | 2008-01-22 | 2017-03-29 | LG Electronics Inc. | Brushless direct current motor |
| JP5208088B2 (en) * | 2009-10-30 | 2013-06-12 | 三菱電機株式会社 | Permanent magnet embedded motor and blower |
| JP5937425B2 (en) * | 2011-12-26 | 2016-06-22 | アスモ株式会社 | Rotor and motor |
| CN104158322B (en) * | 2014-07-31 | 2018-05-22 | 广东威灵电机制造有限公司 | Rotor and with its motor |
-
2015
- 2015-09-08 JP JP2017538758A patent/JP6420488B2/en active Active
- 2015-09-08 CN CN201580082239.0A patent/CN107852048B/en active Active
- 2015-09-08 WO PCT/JP2015/075482 patent/WO2017042886A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002291179A (en) * | 2001-03-27 | 2002-10-04 | Matsushita Seiko Co Ltd | Stator core of half-pitch capacitor induction motor |
| JP2005027422A (en) * | 2003-07-02 | 2005-01-27 | Hitachi Ltd | Permanent magnet type rotating electric machine and electric compressor using the same |
| US6847144B1 (en) * | 2003-12-10 | 2005-01-25 | Industrial Technology Research Institute | Permanent magnet rotor assembly for interior permanent magnet electric motor |
| JP2008029095A (en) * | 2006-07-20 | 2008-02-07 | Hitachi Industrial Equipment Systems Co Ltd | Permanent magnet type dynamo-electric machine and compressor using the same |
| US20090140590A1 (en) * | 2007-12-04 | 2009-06-04 | Industrial Technology Research Institute | Permanent magnet type magnetic pole core structure capable of minimizing cogging torque for rotating electric machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6420488B2 (en) | 2018-11-07 |
| JPWO2017042886A1 (en) | 2018-03-15 |
| CN107852048B (en) | 2019-10-25 |
| CN107852048A (en) | 2018-03-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6507273B2 (en) | Rotor for permanent magnet embedded motor and motor using the same | |
| US20140001906A1 (en) | Brushless motor and electric device mounted with same | |
| EP2527098B1 (en) | Electric power tool | |
| JPWO2007123107A1 (en) | motor | |
| JP2012120326A (en) | Interior magnet rotor, motor, and method for assembling motor | |
| JP2010088296A (en) | Motor with robed rotor having even air gap and uneven air gap | |
| KR100624381B1 (en) | Rotor for interior permanent magnet synchronous motor and method for manufacturing the rotor | |
| JP5511921B2 (en) | Electric motor, blower and compressor | |
| JP2007151293A (en) | Motor | |
| KR20170039606A (en) | Brushless motor | |
| JP2013132164A (en) | Permanent magnet motor | |
| WO2014195999A1 (en) | Synchronous motor | |
| JP5325074B2 (en) | Rotating electric machine and its stator | |
| WO2010110150A1 (en) | Permanent magnet-embedded motor | |
| WO2017042886A1 (en) | Permanent magnet-type rotating electric motor and compressor using same | |
| JP2009254030A (en) | Motor | |
| JP5264551B2 (en) | Electric motor, blower and compressor | |
| JP2013207857A (en) | Brushless motor | |
| JP4770434B2 (en) | motor | |
| JP6435838B2 (en) | Rotating electric machine rotor and rotating electric machine including the same | |
| KR20100068871A (en) | Stator for electric machines using rectangular copper wire | |
| JP6295161B2 (en) | Rotor and motor | |
| JP2013201865A (en) | Brushless motor | |
| JP2006020459A (en) | Stator core and dynamo-electric machine equipped with the same | |
| JP2019213417A (en) | Brushless motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15903552 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2017538758 Country of ref document: JP Kind code of ref document: A |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 15903552 Country of ref document: EP Kind code of ref document: A1 |