WO2013075288A1 - Structure de rotor pour moteur électrique synchrone à aimants permanents, et moteur électrique synchrone à aimants permanents - Google Patents

Structure de rotor pour moteur électrique synchrone à aimants permanents, et moteur électrique synchrone à aimants permanents Download PDF

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Publication number
WO2013075288A1
WO2013075288A1 PCT/CN2011/082642 CN2011082642W WO2013075288A1 WO 2013075288 A1 WO2013075288 A1 WO 2013075288A1 CN 2011082642 W CN2011082642 W CN 2011082642W WO 2013075288 A1 WO2013075288 A1 WO 2013075288A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnet
rotor
magnetic steel
magnet synchronous
rotor core
Prior art date
Application number
PCT/CN2011/082642
Other languages
English (en)
Chinese (zh)
Inventor
袁沛海
Original Assignee
浙江迈雷科技有限公司
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 浙江迈雷科技有限公司 filed Critical 浙江迈雷科技有限公司
Publication of WO2013075288A1 publication Critical patent/WO2013075288A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • 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
    • H02K1/2706—Inner rotors
    • H02K1/2713—Inner rotors the magnetisation axis of the magnets being axial, e.g. claw-pole type
    • 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
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect

Definitions

  • the invention relates to a rotor structure of an electric machine, and more particularly to a rotor structure of a permanent magnet synchronous motor. Background technique
  • the excitation effect of the rotor of the brushless DC motor on the motor mainly depends on the excitation of the magnetic steel.
  • the high magnetic density excitation allows the motor to obtain a higher magnetic load and increase the power density of the motor.
  • high-performance rare-earth magnetic steel materials must be selected for the motor to obtain a high magnetic load.
  • Motors with low-performance permanent magnet materials (such as ferrite) are used because of the low magnetic load.
  • the power density is low, and the size of the outer shape is large, and the application is greatly limited.
  • high-power density motors have gradually been accepted by the market, due to the shortage of rare earth resources, the cost of rare earth has doubled in recent years, so the existing rotor structure can no longer meet the market requirements of cost-effective products.
  • Chinese Patent No. CN 2097466U discloses a permanent magnet rotor for a motor, which is composed of a permanent magnet core, a rotor shaft and left and right end caps.
  • the permanent magnet core is composed of a silicon steel sheet and an elongated permanent magnet, and the silicon steel sheet is an integral structure, and the inside The slot with the pair of hooks is arranged, the long permanent magnet is inserted into the slot of the silicon steel sheet, the permanent magnet core is tightly mounted on the rotor shaft, and the left and right end caps press, fix and seal the iron core.
  • the rotor adopts a structure in which a permanent magnet is embedded in the rotor core.
  • Another Chinese patent CN 101123386 B discloses a tangential magnetic steel permanent magnet synchronous motor, including a stator core, an armature winding, a tangential magnetized permanent magnet, a N-pole magnet, a rotor S-pole magnet, a rotating shaft, The drive end fixing cup cover, the non-drive end fixing cup cover, the bearing, the front end cover, the rear end cover and the casing, wherein the armature winding is embedded in the ten stator core groove to form the motor stator; the tangential magnetized permanent magnet and the rotor N pole guide The magnet and the rotor S pole magnet are fastened on the rotating shaft by the driving end fixing cup cover and the non-drive end fixing cup cover to form the motor rotor; the motor stator and the motor rotor are installed in the casing, and the front end cover is respectively
  • the rotor structure of the motor also adopts an embedded permanent magnet structure, and the permanent magnets in the rotor extend to both ends beyond the length of the rotor core, and the magnetic flux leakage of the stator end winding is used to increase the air gap magnetic density, but the end leakage
  • the magnetic flux is small and very unstable, so the added contribution to the air gap magnetic density is not cost effective compared to the cost of increasing the length of the permanent magnet and the core.
  • the rotor core cannot be stamped at one time during the manufacturing process, and the rotor core and the permanent magnet need to be attached to each other, which takes time and effort to further increase the cost.
  • the present invention provides a permanent magnet synchronous motor rotor structure.
  • the invention provides a permanent magnet synchronous motor rotor structure, comprising a rotor core, wherein the rotor core is embedded with a main excitation magnetic steel made of a permanent magnet material, and the rotor core is provided with permanent magnets at both ends thereof a spare magnetic steel made of a material, the auxiliary magnetic magnetic steel is provided with a magnetic conductive plate for conducting a magnetic circuit, and the main magnetic magnetic steel and the auxiliary magnetic magnetic steel have the same number of magnetic poles formed in the rotor core and The polarity is the same.
  • the rotor core and the magnetic conductive plate are both good magnetic materials, and the main excitation magnetic steel structure embedded in the rotor core forms a built-in permanent magnet rotor, which is the main excitation of the motor;
  • the auxiliary excitation magnetic steel and the magnetic conductive plate form an axial magnetic circuit, which is a secondary excitation of the motor.
  • the main excitation magnetic steel and the auxiliary excitation magnetic steel are co-excited to the same magnetic conductor (one magnetic pole of the rotor core), and magnetized to the magnetic pole of the same rotor core, thereby effectively improving the excitation effect of the rotor.
  • the magnetic load of the motor is also significantly increased.
  • the rotor core is provided with a pair of punching grooves for accommodating the main excitation magnetic steel, and the pair of punching grooves are symmetrically distributed with the rotor core axis as a symmetrical center.
  • one end of the pair of slot grooves arranged in a pair is connected by a connecting slot, the connecting slot A magnetic bridge is provided at the other end of the inner and the groove.
  • the auxiliary excitation magnetic steel has a circular or fan shape in cross section.
  • the auxiliary excitation magnetic steel has a sectional shape of a sector and the number of the main excitation magnetic steel is half.
  • the punch groove has a cross-sectional shape of ⁇ or W.
  • the axes of the pair of slot grooves are at an angle of 30-70 and intersect at the center of symmetry of the rotor core.
  • the present invention also provides a permanent magnet synchronous motor comprising the rotor structure as described above, wherein a stator core is disposed outside the rotor core, a stator winding is embedded in the stator core, and the rotor core and the stator are embedded There is an air gap between the iron cores.
  • a rotating shaft is disposed in the rotor core.
  • the main excitation magnetic steel and the auxiliary excitation magnetic steel are both ferrite permanent magnet materials.
  • the present invention has the following advantages:
  • the main excitation magnetic steel and the auxiliary excitation magnetic steel are co-excited to the same magnetic conductor (one magnetic pole of the rotor core), and magnetized to the magnetic pole of the same rotor core, thereby effectively improving the excitation effect of the rotor. , also significantly increased the magnetic load of the motor.
  • the rotor structure of the present invention can add or remove substances correspondingly on the magnetic conductive plate during the balancing of the magnetic balance to realize the dynamic balance of the rotor.
  • the permanent magnet synchronous motor of the present invention can obtain a large magnetic load, so that a relatively inexpensive non-rare earth permanent magnet material can be used, which saves cost and is cost-effective.
  • Figure 1 is a schematic view of the embodiment
  • Figure 2 is a schematic cross-sectional view of the present embodiment.
  • a permanent magnet synchronous motor includes a rotor core 4 in which a main excitation magnetic steel 3 made of a permanent magnet material is embedded, and the rotor core 4 is provided at both ends thereof.
  • a permanent magnet magnetic steel 6 made of a permanent magnet material is provided, and a magnetic conductive plate 5 for conducting a magnetic circuit is provided outside the auxiliary excitation magnetic steel 6, and a main excitation magnetic steel 3 and a secondary excitation magnetic steel 6 are formed in the rotor core 4.
  • the number of magnetic poles is the same and the polarity is the same.
  • the rotor core 4 is provided with a pair of punching grooves for accommodating the main excitation magnets 3, and the cross-sectional shape of the punching grooves is ⁇ -shaped or W-shaped, and the pair of punching grooves are
  • the axis of the rotor core 4 is symmetrically distributed symmetrically, and the axes of the pair of slot grooves are arranged at an angle of 30-70.
  • intersecting at the center of symmetry of the rotor core 4 one end of the pair of punched grooves is connected by a connecting groove, and the other end of the connecting groove and the punching groove are provided with a magnetic bridge, and the sectional shape of the auxiliary magnetic steel 6 is Round.
  • the sectional shape of the auxiliary field magnet 6 which is not shown in Figs. 1 and 1 is a fan shape, and the number of the auxiliary field magnets 6 is half the number of the main field magnets.
  • the rotor core 4 has a stator core 1 , a stator winding 2 embedded in the stator core, and an air gap between the rotor core 4 and the stator core 1.
  • the rotor core 4 is provided with a rotating shaft, and the main exciting magnetic steel 3 and the auxiliary exciting magnetic steel 6 are both ferrite-based permanent magnetic materials.
  • the rotor core 4 and the magnetic conductive plate 5 are both good magnetic materials; the main excitation magnet 3 is embedded in the rotor core 4 to form a built-in permanent magnet rotor structure, which is the main excitation of the motor; the auxiliary excitation magnetic steel 6 paste On both sides of the rotor core 4, and using the magnetic conductive plate 5, an axial magnetic circuit is formed, which is a secondary excitation of the motor.
  • the exciting magnetic pole and the auxiliary magnetic magnetic steel 6 generated by the main exciting magnetic steel 3 have the same number of magnetic poles and the same polarity in the rotor core 4.
  • the main and auxiliary excitation can form a common magnetization effect of the plurality of magnets of the motor rotor to the same magnetizer, and gather the same magnetic pole of the rotor core 4; thus effectively improving the excitation effect of the rotor, and also significantly improving the magnetic load of the motor;
  • the axial dimension of the auxiliary magnetic circuit increased by the motor is lower than that of the stator winding 2
  • the end of the motor does not affect the spatial arrangement of the motor. Therefore, the invention is suitable for a motor solution of a low performance permanent magnet material (such as ferrite) instead of a high performance ferrite (such as neodymium iron boron), and is particularly suitable for a low cost high power density motor solution without rare earth materials.
  • a rotor with a length to diameter ratio of 1 can increase the magnetic density by more than 40% than the polymagnetic core using only the embedded permanent magnet magnet rotor structure on the premise of using the same magnetic material.
  • the effect of the present invention is positive and significant compared to the prior art.
  • the invention fully utilizes the axial space of the rotor, and cooperates with the rotor core of the ⁇ -shaped or W-shaped punching groove, can effectively increase the magnetic collecting effect of the rotor, and obviously improve the magnetic load and power density of the motor, and adopts the technology of the present invention.
  • the brushless DC motor can avoid both the application of rare earths and the design requirements of high power density.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

L'invention concerne une structure de rotor pour moteur électrique synchrone à aimants permanents, laquelle structure de rotor comprend un noyau de fer de rotor (4), un aimant en acier d'excitation principal (3) fait d'un matériau magnétique permanent et noyé dans le noyau de fer du rotor (4), des aimants en acier d'excitation auxiliaire (6) faits d'un matériau magnétique permanent et disposés aux deux extrémités du noyau de fer du rotor (4), et une plaque conductrice magnétique (5) disposée à l'extérieur des aimants en acier d'excitation auxiliaire (6) afin de conduire un trajet magnétique, le nombre de pôles magnétiques et la polarité magnétique formée par l'aimant en acier d'excitation principal (3) et les aimants en acier d'excitation auxiliaire (6) dans le noyau de fer du rotor (4) étant identiques. L'aimant en acier d'excitation principal et les aimants en acier d'excitation auxiliaire dans la structure de rotor excitent le même conducteur magnétique, magnétisant le même pôle magnétique du noyau de fer du rotor et augmentant ainsi efficacement les effets d'excitation du rotor tout en augmentant sensiblement le chargement magnétique du moteur électrique. L'invention concerne également un moteur électrique synchrone à aimants permanents.
PCT/CN2011/082642 2011-11-21 2011-11-22 Structure de rotor pour moteur électrique synchrone à aimants permanents, et moteur électrique synchrone à aimants permanents WO2013075288A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110371397.1 2011-11-21
CN201110371397.1A CN102377264B (zh) 2011-11-21 2011-11-21 一种永磁同步电机转子结构以及永磁同步电机

Publications (1)

Publication Number Publication Date
WO2013075288A1 true WO2013075288A1 (fr) 2013-05-30

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PCT/CN2011/082642 WO2013075288A1 (fr) 2011-11-21 2011-11-22 Structure de rotor pour moteur électrique synchrone à aimants permanents, et moteur électrique synchrone à aimants permanents

Country Status (2)

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CN (1) CN102377264B (fr)
WO (1) WO2013075288A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10461614B2 (en) 2015-07-15 2019-10-29 Feaam Gmbh Rotor and electrical machine

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105391209A (zh) * 2015-12-21 2016-03-09 南车株洲电机有限公司 一种永磁电机转子结构及其安装方法
CN108880027B (zh) * 2017-05-08 2020-04-24 上海博泽电机有限公司 电机及电机转子
CN110492636A (zh) * 2019-08-13 2019-11-22 珠海凌达压缩机有限公司 一种高转子聚磁结构、转子、电机及压缩机
CN112467902B (zh) * 2020-11-19 2021-09-14 珠海格力电器股份有限公司 一种混合式磁场转子及混合式磁场转子的装配方法
CN112821620A (zh) * 2021-03-16 2021-05-18 山东理工大学 组合式磁极永磁驱动电机
CN112821619B (zh) * 2021-03-16 2024-06-11 山东理工大学 汽车用组合式永磁与无刷电磁混合励磁发电机
CN118508636A (zh) * 2023-02-16 2024-08-16 珠海格力电器股份有限公司 转子组件及具有其的电机

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CN2233131Y (zh) * 1994-09-14 1996-08-14 丑伦忠 桥极式稀土永磁发电机转子
JP2000270525A (ja) * 1999-03-18 2000-09-29 Toshiba Corp 永久磁石式リラクタンス型回転電機
CN2653764Y (zh) * 2003-10-31 2004-11-03 上海海洲微型电机制造有限公司 永磁同步电动机转子
CN1848607A (zh) * 2005-04-17 2006-10-18 谢庆生 多向混合永磁节能电机
JP2008017645A (ja) * 2006-07-07 2008-01-24 Matsushita Electric Ind Co Ltd 永久磁石埋込型電動機

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JP3913205B2 (ja) * 2003-09-10 2007-05-09 アイチエレック株式会社 永久磁石回転機
CN102142755A (zh) * 2011-03-07 2011-08-03 浙江大学 自起动永磁同步电机v型槽转子
CN202374066U (zh) * 2011-11-21 2012-08-08 浙江迈雷科技有限公司 一种永磁同步电机转子结构以及永磁同步电机

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Publication number Priority date Publication date Assignee Title
CN2233131Y (zh) * 1994-09-14 1996-08-14 丑伦忠 桥极式稀土永磁发电机转子
JP2000270525A (ja) * 1999-03-18 2000-09-29 Toshiba Corp 永久磁石式リラクタンス型回転電機
CN2653764Y (zh) * 2003-10-31 2004-11-03 上海海洲微型电机制造有限公司 永磁同步电动机转子
CN1848607A (zh) * 2005-04-17 2006-10-18 谢庆生 多向混合永磁节能电机
JP2008017645A (ja) * 2006-07-07 2008-01-24 Matsushita Electric Ind Co Ltd 永久磁石埋込型電動機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10461614B2 (en) 2015-07-15 2019-10-29 Feaam Gmbh Rotor and electrical machine

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CN102377264B (zh) 2014-03-19
CN102377264A (zh) 2012-03-14

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