WO2011007694A1 - Moteur synchrone du type à aimant permanent - Google Patents

Moteur synchrone du type à aimant permanent Download PDF

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Publication number
WO2011007694A1
WO2011007694A1 PCT/JP2010/061412 JP2010061412W WO2011007694A1 WO 2011007694 A1 WO2011007694 A1 WO 2011007694A1 JP 2010061412 W JP2010061412 W JP 2010061412W WO 2011007694 A1 WO2011007694 A1 WO 2011007694A1
Authority
WO
WIPO (PCT)
Prior art keywords
synchronous motor
permanent magnet
type synchronous
protrusion
cogging torque
Prior art date
Application number
PCT/JP2010/061412
Other languages
English (en)
Japanese (ja)
Inventor
敏則 田中
信一 山口
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.)
Filing date
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 KR1020127000542A priority Critical patent/KR101288732B1/ko
Publication of WO2011007694A1 publication Critical patent/WO2011007694A1/fr

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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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
    • 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
    • H02K21/02—Details
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles

Definitions

  • the present invention relates to a permanent magnet type synchronous motor that suppresses cogging torque.
  • cogging torque is generated between the stator core (stator core) and the rotor (rotor) when the rotor magnet (rotor) is rotated by external drive when no winding is energized.
  • Torque pulsation component is a torque pulsation generated between the stator core and the rotor (rotor) when the winding is energized and driven.
  • the cogging torque generates a pulsation number of the least common multiple of the number of slots of the stator and the number of magnetic poles of the permanent magnet for each mechanical rotation of the rotor.
  • the magnitude of this cogging torque is inversely proportional to the number of pulsations.
  • a radial anisotropic ring magnet or a polar anisotropic ring magnet may be used as a magnet.
  • ring magnets have a plurality of poles in one magnet. For this reason, the magnet variation of each pole becomes large under the influence of creating a magnetized yoke shape or ring magnet. As a result, when the rotor makes one mechanical rotation, cogging torque having the same number of pulsations as the number of slots is generated.
  • the cogging torque generated by this magnet variation has a different frequency from the cogging torque generated by the least common multiple of the number of poles and the number of protrusions. For this reason, it is difficult to reduce the cogging torque generated by the magnet variation only by devising the shape of the protrusion.
  • the present invention has been made to solve the above-described problems, and in a slotless motor provided with a stator protrusion, a permanent magnet capable of making the cogging torque caused by magnet variation as close to zero as possible.
  • An object is to obtain a synchronous motor.
  • a permanent magnet synchronous motor according to the present invention is a permanent magnet synchronous motor having a stator protrusion, an annularly formed winding attached to the stator protrusion, and a permanent magnet.
  • the coil end portion has a protrusion.
  • the same number of protrusions as the stator protrusions are provided at the coil end portion, and the useless space is effectively utilized.
  • a permanent magnet type synchronous motor that can make the cogging torque as close to zero as possible can be obtained.
  • FIG. 1 is a perspective view of a permanent magnet type synchronous motor in Embodiment 1 of the present invention.
  • 1 is a perspective view of a permanent magnet type synchronous motor in Embodiment 1 of the present invention.
  • 1 is a perspective view of a permanent magnet type synchronous motor in Embodiment 1 of the present invention.
  • 1 is a perspective view of a permanent magnet type synchronous motor in Embodiment 1 of the present invention.
  • 1 is a perspective view of a permanent magnet type synchronous motor in Embodiment 1 of the present invention.
  • 1 is a perspective view of a permanent magnet type synchronous motor in Embodiment 1 of the present invention.
  • Embodiment 1 of the present invention It is a plane development view of the permanent magnet type synchronous motor in Embodiment 1 of the present invention. It is the figure which showed the cogging torque waveform of only the stator protrusion 1a with respect to the rotation angle of the permanent magnet type synchronous motor in Embodiment 1 of this invention, and the cogging torque waveform of only the protrusion 1b. It is sectional drawing which shows a cross section perpendicular
  • the present invention relates to a motor driven by a so-called three-phase power source, and relates to a motor having a stator projection and a permanent magnet formed in an annular shape and provided with a winding (coil).
  • a stator projection (main pole) is provided at the central portion of the coil of such a motor, and projections having the same size in the circumferential direction and the axial direction are provided between the projections between the coil centers.
  • a technical feature is that a protrusion-shaped cogging torque reduction unit is provided.
  • FIG. 1 is a cross-sectional view showing a cross section perpendicular to the axial direction of the permanent magnet type synchronous motor according to Embodiment 1 of the present invention.
  • the permanent magnet type synchronous motor is composed of 8 poles and 6 slots.
  • FIG. 2 is an enlarged view of the protrusion portion of the permanent magnet type synchronous motor according to the first embodiment of the present invention, and shows the size of the protrusions 1a and 1b in FIG.
  • the protrusion 1a corresponds to a stator protrusion
  • the protrusion 1b corresponds to a protrusion provided to reduce cogging torque.
  • FIG. 3 to 6 are perspective views of the permanent magnet type synchronous motor according to the first embodiment of the present invention, and are perspective views in the axial direction on the AA ′ plane of FIG.
  • FIG. 3 shows the arrangement of the protrusions 1a and 1b.
  • FIG. 4 shows the axial lengths of the protrusions 1a and 1b.
  • FIG. 5 shows a state where the coil 10 is attached to the protrusion 1a of FIG.
  • FIG. 6 shows a state after the coil 10 is attached to the protrusion 1a.
  • FIG. 7 is a plan development view of the permanent magnet type synchronous motor according to the first embodiment of the present invention, and is a plan development view showing a state after the coil 10 is attached to the protrusion 1a shown in FIG. . 1 illustrates a motor having 8 poles, the combination of the poles and the number of slots is not limited to this.
  • FIG. 8 is a diagram showing a cogging torque waveform of only the stator protrusion 1a and a cogging torque waveform of only the protrusion 1b with respect to the rotation angle of the permanent magnet type synchronous motor according to the first embodiment of the present invention.
  • L> (L1 + L2 + L3) in FIG. 7A, L (L1 + L2 + L3) in FIG. 7B, and L ⁇ (L1 + L2 + L3) in FIG. 7C.
  • L2 L3 or L2 ⁇ L3.
  • the coil end portion is rounded and has an elliptical shape. Therefore, in the first embodiment, the protrusion 1b having the same size as the protrusion 1a is formed between the ends of the adjacent coils 10, that is, in the space between the coil ends, as shown in FIG. It is provided at the coil end. As a result, as shown in FIG. 8, the projection 1b generates a cogging torque out of phase with the projection 1a.
  • the cogging torque generated by the protrusion 1a and the cogging torque generated by the protrusion 1b are shifted from each other by a half cycle (see FIG. 8). For this reason, it is possible to reduce the cogging torque generated by the magnet variation.
  • a protrusion having the same size is provided at the axial end, that is, at the center between the protrusions adjacent in the radial direction to the coil end. Is provided to effectively use the useless space. As a result, a component having a phase opposite to that of the cogging torque generated due to the variation in the pole pitch width can be created, and the cogging torque can be reduced.
  • Embodiment 2 FIG. In the first embodiment, the case where the shapes of the stator protrusion 1a and the protrusion 1b are the same has been described. On the other hand, in the second embodiment, the case where the shape of the protrusion 1b is different from the shape of the stator protrusion 1a will be described.
  • FIG. 9 is a cross-sectional view showing a cross section perpendicular to the axial direction of the permanent magnet type synchronous motor according to the second embodiment of the present invention.
  • FIG. 9 shows an 8-pole 6-slot structure.
  • FIG. 10 is a perspective view of a permanent magnet type synchronous motor according to Embodiment 2 of the present invention, and is an axial perspective view of the AA ′ plane of FIG.
  • FIG. 11 is a plan development view of the permanent magnet type synchronous motor according to the second embodiment of the present invention, and shows a plan development view when the coil 10 is applied to the cores of FIGS.
  • the protrusion 1b has a shape different from that of the protrusion 1a, and the protrusion shape is designed so as not to contact the coil 10 in a space between adjacent coil end portions.
  • FIG. 12 is a diagram showing a cogging torque waveform of only the stator protrusion 1a and a cogging torque waveform of only the protrusion 1b with respect to the rotation angle of the permanent magnet synchronous motor according to the second embodiment of the present invention. It is a cogging torque waveform when it makes one rotation mechanically. Since the protrusion 1b has a different shape from the protrusion 1a, the cogging torque waveform has a different shape. Therefore, by setting the shape of the protrusion 1b to an optimum shape by using a simulation such as magnetic field analysis, a cogging torque having a phase shift in the protrusions 1a and 1b can be generated, and the cogging torque can be reduced. Is possible.
  • the shape of the protrusion 1b is optimized by using a simulation such as magnetic field analysis.
  • the effect similar to the form 1 of this can be acquired.
  • the length in the axial direction can be shortened by making the protrusion provided on the coil end portion a shape that matches the coil shape, Furthermore, the cogging torque generated due to magnet variation can be reduced.
  • Embodiment 3 FIG. In the third embodiment, a configuration in which the protrusion 1b is provided and further provided with a shaving portion for reducing the cogging torque generated by the number of poles and the number of protrusions will be described.
  • FIG. 13 is a cross-sectional view showing a cross section perpendicular to the axial direction of the permanent magnet type synchronous motor according to Embodiment 3 of the present invention.
  • FIG. 13 shows a structure composed of 8 poles and 6 slots.
  • FIG. 14 is a perspective view of a permanent magnet type synchronous motor according to Embodiment 3 of the present invention, and is an axial perspective view of the AA ′ plane of FIG.
  • FIG. 15 is a plan development view of the permanent magnet type synchronous motor according to Embodiment 3 of the present invention.
  • FIG. 16 is a diagram showing a cogging torque waveform of only the protruding portion and a cogging torque waveform of only the shaving portion with respect to the rotation angle of the permanent magnet type synchronous motor according to the third embodiment of the present invention. As a result, the cogging torque generated by the number of poles and the number of protrusions can be reduced.
  • the same effect as in the first and second embodiments can be obtained by further providing the shaving portion 2a and the shaving portion 2b corresponding to each of the projection 1a and the projection 1b.
  • the cogging torque generated by the number of poles and the number of protrusions can be reduced. That is, by providing such a shaved portion, a further effect of reducing the cogging torque generated by the protrusion can be obtained.
  • Embodiment 4 FIG. In the fourth embodiment, a case will be described in which the cogging torque reduction measures described in the first to third embodiments are applied to a permanent magnet type synchronous motor having a polar anisotropic ring magnet.
  • FIG. 17 is an orientation diagram of the radial ring magnet 21.
  • FIG. 18 is an orientation diagram of polar anisotropic ring magnet 22 of the permanent magnet type synchronous motor according to Embodiment 4 of the present invention.
  • the polar anisotropic ring magnet 22 theoretically has no magnetic flux passing through the rotor core back portion. For this reason, it is used for a motor or the like in which the rotor core 30 has a small diameter and the rotor core back portion cannot be made large.
  • the polar anisotropic ring magnet 22 is different from the radial ring magnet 21 in that the magnetizable direction is determined from the molding orientation. For this reason, the deviation of the pole pitch of each pole is likely to be larger than that of the radial ring magnet 21.
  • a countermeasure against cogging torque due to magnet variation is effective.
  • the fourth embodiment when a polar anisotropic ring magnet is used, it is possible to take measures against cogging torque by applying the configurations of the first to third embodiments. . That is, the polar anisotropic ring magnet has a larger magnet variation than the radial ring magnet. However, a polar anisotropic ring magnet is often used particularly in a motor having a small diameter due to the influence of the rotor core back. Therefore, the configurations of the first to third embodiments are effective as a countermeasure against cogging torque when a polar anisotropic ring magnet is used with a motor having a small diameter.
  • Z / (3 (phase) ⁇ 2P) is 0.5 or 0.25 when there are Z stator protrusions (Z is a natural number) and 2P poles (P is a natural number) permanent magnets. This combination of pole slots is effective for a motor having a small diameter.

Landscapes

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

Abstract

L'invention porte sur un moteur synchrone du type à aimant permanent qui peut avoir un couple de détente, qui est dû à une non uniformité des aimants, dont la valeur est rendue infiniment proche de zéro dans un moteur sans encoche ayant des saillies de stator installées. Le moteur synchrone du type à aimant permanent, qui comprend les saillies de stator (1a) ; un enroulement (10) qui est formé pour être circulaire et monté sur les saillies de stator ; et un aimant permanent ; comprend également des saillies (1b) destinées à réduire le couple de détente, au niveau de sections d'extrémité de bobine de l'enroulement entre les saillies de stator. Il sera possible de compenser le couple de détente par création d'une composante qui aura une phase opposée à la phase du couple de détente, qui est dû à l'effet de non-uniformité des aimants et aux saillies de stator, par placement des saillies (1b) en nombre égal à celui des saillies de stator (1a) au niveau des sections d'extrémité de bobine.
PCT/JP2010/061412 2009-07-15 2010-07-05 Moteur synchrone du type à aimant permanent WO2011007694A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020127000542A KR101288732B1 (ko) 2009-07-15 2010-07-05 영구 자석식 동기 모터

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-166478 2009-07-15
JP2009166478A JP5478136B2 (ja) 2009-07-15 2009-07-15 永久磁石式同期モータ

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WO2011007694A1 true WO2011007694A1 (fr) 2011-01-20

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JP (1) JP5478136B2 (fr)
KR (1) KR101288732B1 (fr)
TW (1) TW201112583A (fr)
WO (1) WO2011007694A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018202410A1 (fr) * 2017-05-03 2018-11-08 Atlas Copco Industrial Technique Ab Moteur synchrone électrique
CN111542990A (zh) * 2017-12-28 2020-08-14 株式会社电装 旋转电机

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JP2013132164A (ja) * 2011-12-22 2013-07-04 Sharp Corp 永久磁石モータ
US11843334B2 (en) 2017-07-13 2023-12-12 Denso Corporation Rotating electrical machine
CN113991959B (zh) 2017-07-21 2024-04-16 株式会社电装 旋转电机
JP2019024293A (ja) 2017-07-21 2019-02-14 株式会社デンソー 回転電機
DE112018006717T5 (de) 2017-12-28 2020-09-10 Denso Corporation Rotierende elektrische Maschine
WO2019131913A1 (fr) * 2017-12-28 2019-07-04 株式会社デンソー Machine électrique rotative
JP6927186B2 (ja) 2017-12-28 2021-08-25 株式会社デンソー 回転電機
CN111565965B (zh) 2017-12-28 2023-07-14 株式会社电装 车轮驱动装置
DE112018006694T5 (de) 2017-12-28 2020-09-10 Denso Corporation Rotierende elektrische Maschine
CN111557069A (zh) 2017-12-28 2020-08-18 株式会社电装 旋转电机
WO2019131911A1 (fr) * 2017-12-28 2019-07-04 株式会社デンソー Machine électrique rotative
JP7006541B2 (ja) * 2017-12-28 2022-01-24 株式会社デンソー 回転電機
CN113692690A (zh) 2020-03-05 2021-11-23 株式会社电装 旋转电机

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JP2009027849A (ja) * 2007-07-20 2009-02-05 Mitsubishi Electric Corp 永久磁石式回転電機

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JPH0923625A (ja) * 1995-07-06 1997-01-21 Minebea Co Ltd モータ構造
JP3083887U (ja) * 2001-08-03 2002-02-15 建準電機工業股▲分▼有限公司 半径方向巻線のステータ組構造
JP2004304928A (ja) * 2003-03-31 2004-10-28 Mitsuba Corp ブラシレスモータ
JP2006121870A (ja) * 2004-10-25 2006-05-11 Sanyo Electric Co Ltd モータ装置
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018202410A1 (fr) * 2017-05-03 2018-11-08 Atlas Copco Industrial Technique Ab Moteur synchrone électrique
CN110622399A (zh) * 2017-05-03 2019-12-27 阿特拉斯·科普柯工业技术公司 同步电机
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CN111542990B (zh) * 2017-12-28 2023-02-28 株式会社电装 旋转电机

Also Published As

Publication number Publication date
KR101288732B1 (ko) 2013-07-23
JP5478136B2 (ja) 2014-04-23
TW201112583A (en) 2011-04-01
KR20120027494A (ko) 2012-03-21
JP2011024324A (ja) 2011-02-03

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