WO2020043049A1 - Aimant permanent de type composite de rotor de moteur synchrone à aimants permanents - Google Patents

Aimant permanent de type composite de rotor de moteur synchrone à aimants permanents Download PDF

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Publication number
WO2020043049A1
WO2020043049A1 PCT/CN2019/102518 CN2019102518W WO2020043049A1 WO 2020043049 A1 WO2020043049 A1 WO 2020043049A1 CN 2019102518 W CN2019102518 W CN 2019102518W WO 2020043049 A1 WO2020043049 A1 WO 2020043049A1
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WO
WIPO (PCT)
Prior art keywords
permanent magnet
composite
sheath
motor rotor
synchronous
Prior art date
Application number
PCT/CN2019/102518
Other languages
English (en)
Chinese (zh)
Inventor
胡思宁
熊伟华
吴立华
董继勇
Original Assignee
南京磁谷科技有限公司
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 南京磁谷科技有限公司 filed Critical 南京磁谷科技有限公司
Publication of WO2020043049A1 publication Critical patent/WO2020043049A1/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
    • H02K1/22—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
    • H02K1/00—Details of the magnetic circuit
    • H02K1/02—Details of the magnetic circuit characterised by the magnetic material

Definitions

  • the invention relates to a composite permanent magnet of a synchronous permanent magnet motor rotor.
  • Magnetic levitation motors are much smaller than ordinary motors due to their high speed. Therefore, some medium-powered magnetic levitation permanent magnet motors use simple integral permanent magnets. There are two advantages to this: first, the rotor has a simple structure and is easy to manufacture; second, the rotor mandrel can be made of non-magnetically permeable material, so as to avoid the magnetic interference of the rotor permanent magnets from working with the magnetic bearings.
  • the permanent magnet sheath has a large stress, and an expensive high-strength alloy material must be used.
  • the working temperature of the rotor can reach above 100 ° C, and the thermal expansion coefficient of the permanent magnet is close to 0, and the thermal expansion coefficient of the sheath is 12-16, the sheath and the permanent magnet tend to loosen during operation.
  • the stress of the sheath is very large (in some cases, it can reach 700-1000MPa), so that expensive high-strength alloy materials must be used.
  • the present invention is to provide a composite permanent magnet of a rotor of a synchronous permanent magnet motor in order to solve the problems existing in the prior art.
  • the technical scheme adopted by the present invention is: a composite permanent magnet of a synchronous permanent magnet motor rotor, which includes a permanent magnet, a permanent magnet bracket, and a permanent magnet sheath, and the two permanent magnets are symmetrically and fixedly connected to the outer wall of the permanent magnet bracket. And the permanent magnet and the permanent magnet bracket form a cylindrical composite permanent magnet unit with a smooth outer wall surface, the permanent magnet sheath is set on the composite permanent magnet unit, and the interference fit between the permanent magnet sheath and the composite permanent magnet unit ;
  • the permanent magnet bracket is made of low carbon steel.
  • the permanent magnet bracket includes a cylindrical body, and two rectangular mounting grooves are symmetrically provided on the outer circumferential wall of the body, and the two mounting grooves are arranged along the axis direction of the body.
  • the permanent magnet is bonded in the installation groove by epoxy glue, and an arc surface is provided on the permanent magnet.
  • the arc surface of the permanent magnet and the outer wall surface of the body jointly form a smooth surface. Cylindrical outer wall surface.
  • the permanent magnet sheath is made of austenitic stainless steel material.
  • the consumption of the permanent magnet material can be reduced by about 50%, and the cost of the permanent magnet can be reduced by nearly 50%.
  • the overall shape of the composite permanent magnet is still cylindrical, which is consistent with the original solid permanent magnet. Therefore, it is possible to replace the solid permanent magnet with a composite permanent magnet part directly on the original production line without having to adjust and change the production line.
  • Austenitic stainless steel can be used to replace high-strength alloy steel to reduce the cost of permanent magnet sheath materials:
  • the low-carbon steel Since the low-carbon steel has the same thermal expansion rate as the sheath, it will not be loosened from the permanent magnet sheath due to thermal expansion during work, so the interference of the sheath can be greatly reduced and the sheath stress can be reduced (as low as 200-250Mpa) Therefore, the low-cost austenitic stainless steel material is used to manufacture the permanent magnet sheath. Only this change can reduce the manufacturing cost of the permanent magnet sheath by more than 70%.
  • FIG. 1 is a structural diagram of the present invention.
  • FIG. 2 is a structural diagram of a composite permanent magnet unit composed of a permanent magnet and a permanent magnet bracket in the present invention.
  • Figure 3 is an exploded view of the present invention.
  • the present invention discloses a composite permanent magnet of a synchronous permanent magnet motor rotor, which includes a permanent magnet 1, a permanent magnet support 2, and a permanent magnet sheath 3.
  • the two permanent magnets 1 are symmetrically fixedly connected to the permanent magnet support. 2 on the outer wall, and the permanent magnet 1 and the permanent magnet bracket 2 form a cylindrical composite permanent magnet unit with a smooth outer wall surface, the permanent magnet sheath 3 is set on the composite permanent magnet unit, and the permanent magnet sheath 3 and the composite Interference fit between permanent magnet units.
  • the permanent magnet bracket 2 in the present invention includes a cylindrical body 21, and two rectangular mounting grooves 22 are symmetrically provided on an outer circumferential wall of the body 21, and the two mounting grooves 22 are arranged along the axis direction of the body 21.
  • the permanent magnet 1 is bonded in the mounting groove 22 by epoxy glue, and an arc surface is provided on the permanent magnet 1. After the permanent magnet 1 is fixed in the mounting groove 22, the arc surface of the permanent magnet 1 and the outer wall surface of the body 21 are common. Forms a smooth cylindrical outer wall surface.
  • the permanent magnet bracket 2 in the present invention is made of low carbon steel, and the permanent magnet sheath 3 is made of austenitic stainless steel material.
  • the "I” -shaped permanent magnet bracket 2 made of low-carbon steel fixes two "tile-shaped” permanent magnets 1 to achieve the same electromagnetic characteristics as the surface-mounted structure.
  • the permanent magnet 1 and the permanent magnet bracket 2 are bonded and assembled with epoxy glue. After the permanent magnet 1 and the permanent magnet bracket 2 are assembled, the shape of the entire composite permanent magnet unit is cylindrical. After the composite permanent magnet unit is assembled, it is subjected to cylindrical grinding as a whole so as to be assembled with the permanent magnet sheath 3.

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

Abstract

Cette invention concerne un aimant permanent de type composite d'un rotor de moteur synchrone à aimants permanents, comprenant des aimants permanents (1), un support d'aimants permanents (2), et une gaine d'aimant permanent (3). Les deux aimants permanents (1) sont solidarisés de manière symétrique à une paroi externe du support d'aimants permanents (2), les aimants permanents (1) et le support d'aimants permanents (2) formant une unité cylindrique d'aimant permanent composite ayant une surface de paroi externe lisse. La gaine d'aimant permanent (3) est gainée sur l'unité d'aimant permanent composite, et la gaine d'aimant permanent (3) et l'unité d'aimant permanent composite sont en ajustement serré. Le support d'aimants permanents (2) est en acier à faible teneur en carbone. L'aimant permanent de type composite permet de réduire la consommation de matériaux pour aimants permanents, de réduire considérablement les coûts et il peut remplacer directement les pièces d'origine d'aimant permanent cylindrique de sorte qu'une ligne de production n'a pas besoin d'être modifiée. L'acier allié à haute résistance peut être remplacé par de l'acier inoxydable austénitique, ce qui permet de réduire le coût du matériau de la gaine d'aimant permanent.
PCT/CN2019/102518 2018-08-30 2019-08-26 Aimant permanent de type composite de rotor de moteur synchrone à aimants permanents WO2020043049A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811000797.XA CN108847733A (zh) 2018-08-30 2018-08-30 一种同步永磁电机转子的复合型永磁体
CN201811000797.X 2018-08-30

Publications (1)

Publication Number Publication Date
WO2020043049A1 true WO2020043049A1 (fr) 2020-03-05

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PCT/CN2019/102518 WO2020043049A1 (fr) 2018-08-30 2019-08-26 Aimant permanent de type composite de rotor de moteur synchrone à aimants permanents

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CN (1) CN108847733A (fr)
WO (1) WO2020043049A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108847733A (zh) * 2018-08-30 2018-11-20 南京磁谷科技有限公司 一种同步永磁电机转子的复合型永磁体

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4933583A (en) * 1988-03-12 1990-06-12 Frankl & Kirchner Gmbh & Co. Kg Fabrik Fur Electromotoren U. Electrische Apparate Rotor having balance weights
JP2000023399A (ja) * 1998-07-02 2000-01-21 Shinko Electric Co Ltd 永久磁石型回転電機のロータ及びその製造方法
CN107579615A (zh) * 2017-10-30 2018-01-12 南京磁谷科技有限公司 一种表贴式永磁转子的极间填充块布置结构
CN108023422A (zh) * 2018-01-23 2018-05-11 江苏瑞斯曼节能技术有限公司 永磁转子、永磁电机及压缩机
CN207368775U (zh) * 2017-10-30 2018-05-15 常州威灵电机制造有限公司 转子组件及电机
CN207530631U (zh) * 2017-10-12 2018-06-22 哈尔滨理工大学 一种新型永磁电机结构
CN108847733A (zh) * 2018-08-30 2018-11-20 南京磁谷科技有限公司 一种同步永磁电机转子的复合型永磁体
CN208797696U (zh) * 2018-08-30 2019-04-26 南京磁谷科技有限公司 一种同步永磁电机转子的复合型永磁体

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5659172B2 (ja) * 2012-02-27 2015-01-28 株式会社日立製作所 永久磁石式回転電機

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4933583A (en) * 1988-03-12 1990-06-12 Frankl & Kirchner Gmbh & Co. Kg Fabrik Fur Electromotoren U. Electrische Apparate Rotor having balance weights
JP2000023399A (ja) * 1998-07-02 2000-01-21 Shinko Electric Co Ltd 永久磁石型回転電機のロータ及びその製造方法
CN207530631U (zh) * 2017-10-12 2018-06-22 哈尔滨理工大学 一种新型永磁电机结构
CN107579615A (zh) * 2017-10-30 2018-01-12 南京磁谷科技有限公司 一种表贴式永磁转子的极间填充块布置结构
CN207368775U (zh) * 2017-10-30 2018-05-15 常州威灵电机制造有限公司 转子组件及电机
CN108023422A (zh) * 2018-01-23 2018-05-11 江苏瑞斯曼节能技术有限公司 永磁转子、永磁电机及压缩机
CN108847733A (zh) * 2018-08-30 2018-11-20 南京磁谷科技有限公司 一种同步永磁电机转子的复合型永磁体
CN208797696U (zh) * 2018-08-30 2019-04-26 南京磁谷科技有限公司 一种同步永磁电机转子的复合型永磁体

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