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High-speed permanent magnet motor rotor structure

A permanent magnet motor and rotor structure technology, applied in the direction of magnetic circuit shape/style/structure, magnetic circuit rotating parts, etc., can solve problems such as easy demagnetization, low mechanical strength, and rotor heating

Inactive Publication Date: 2020-08-21
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-speed permanent magnet motor rotor structure to solve the problems of low mechanical strength of the high-speed permanent magnet motor rotor, easy demagnetization, large torque ripple and rotor heating caused by high-speed rotation

Method used

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  • High-speed permanent magnet motor rotor structure

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] Refer to the attached figure 1 , a high-speed permanent magnet motor rotor structure is characterized in that the rotor includes: reinforcing ribs (1), main permanent magnets (2), auxiliary permanent magnets (3), vents (4), and the reinforcing ribs (1 ) is a ring structure, distributed on both sides of the main permanent magnet, the main permanent magnet (2) is a regular hexagonal structure, the auxiliary permanent magnet (3) is approximately triangular in structure, and the vent (4) circles of equal radius.

[0016] The number of the reinforcing ribs (1) is two, which are fixed on both sides of the main permanent magnet.

[0017] The main permanent magnet (2) is made of NdFeB permanent magnet material, including 18 permanent magnet units.

[0018] The auxiliary permanent magnets (3) are made of ferrite permanent magnet material, and the number is the same as...

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Abstract

The invention provides a high-speed permanent magnet motor rotor structure, and belongs to the technical field of motor structures. A rotor comprises reinforcing ribs, main permanent magnets, auxiliary permanent magnets and ventilation openings, the reinforcing ribs are of circular ring structures and are distributed at two sides of the main permanent magnets, the main permanent magnets are of regular hexagon structures, the auxiliary permanent magnets are of approximately triangular structures, and the ventilation openings are circles with equal radius. According to the motor rotor structure,the mechanical strength of the rotor can be effectively improved, the demagnetization phenomenon caused by high temperature and vibration is overcome to certain extent, lower torque pulsation is obtained, and the problem of rotor heating caused by high-speed rotation of the motor is solved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a rotor structure of a high-speed permanent magnet motor. Background technique [0002] With the continuous development of power electronics technology and the improvement of the performance of new permanent magnet materials, high-speed permanent magnet motors have received great attention in working environments that require high control performance. In aerospace, high-speed grinding machines, natural gas transmission, High-speed motors are widely used in fields such as fuel cells and distributed power generation systems, and most of them use high-speed permanent magnet motors. The permanent magnet rotors of high-speed permanent magnet motors are mostly surface-mounted structures. Since the existing permanent magnet materials are difficult to withstand the high torque ripple generated by high-speed operation, the structure and position of the permanent magnets must be improved. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/32
CPCH02K1/27H02K1/32
Inventor 董守田闫云祥刘静峰刘雪莹张勇卞小濛
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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