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Five-phase permanent magnet synchronous motor with high torque density

A permanent magnet synchronous motor, high torque technology, applied to synchronous motors with stationary armature and rotating magnets, magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., can solve the problem of low third harmonic content , The improvement of torque density is not significant, etc., to achieve the effect of reducing magnetic leakage rate, increasing degree of freedom, and improving utilization

Inactive Publication Date: 2015-09-02
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The third harmonic injection type five-phase permanent magnet synchronous motor can further improve the power and torque density of the motor, but because the third harmonic content of the air gap magnetomotive force generated by the traditional permanent magnet motor rotor is relatively small, the torque density The improvement is not significant

Method used

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  • Five-phase permanent magnet synchronous motor with high torque density
  • Five-phase permanent magnet synchronous motor with high torque density
  • Five-phase permanent magnet synchronous motor with high torque density

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] Such as figure 1 As shown, a five-phase permanent magnet synchronous motor with high torque density, the grooves arranged alternately along the outer circumference of the rotor, inject the fundamental wave and the third harmonic current at the same time, choose the appropriate groove radius, the appropriate fundamental wave and The amplitude and phase of the third harmonic current can significantly increase the output torque of the motor. The above methods have been verified by the finite element method.

[0026] The stator winding adopts five-phase symmetrical fractional slot concentrated winding; the appropriate number of pole slots is used to make the motor winding have a high third harmonic winding coefficient.

[0027] The built-in permanent magnet rotor is adopted, and the permanent magnet is made of high-performance permanent magnet mater...

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Abstract

The invention discloses a five-phase permanent magnet synchronous motor with high torque density. A motor body comprises a stator and a rotor, wherein the stator comprises a stator core and a five-phase fractional slot concentrated winding; and the stator comprises a slotted rotor core and built-in permanent magnets. The outer side of the rotor is provided with grooves which are alternatively arranged along the circumferential direction. The motor disclosed by the invention has the characteristics that the appropriate groove width is selected, and a third-harmonic air gap magnetomotive force can be increased, so that characteristics of a five-phase permanent magnet motor are sufficiently used, that is, fundamental current and third-harmonic current can be injected into the stator winding simultaneously, thereby increasing the current control freedom degree, improving the motor torque density and also being capable of reducing the motor magnetic field saturation.

Description

technical field [0001] The invention relates to a five-phase permanent magnet synchronous motor with high torque density. Background technique [0002] In recent years, with the deterioration of the global environment and the increasing shortage of oil resources, the traditional automobile industry is facing a severe test. Therefore, the research and development of energy-saving and environmentally friendly new energy vehicles has become one of the strategic industries of governments around the world and one of the hot spots that experts and scholars at home and abroad pay attention to. As a category of new energy vehicles, hybrid vehicles stand out for their remarkable advantages of high fuel economy, low exhaust emissions, and long cruising range, and have been rapidly developed. As one of the power sources of hybrid electric vehicles, the requirements for its design are getting higher and higher. The goal of hybrid motor design is to avoid changing the space of the orig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/14H02K1/27
Inventor 宫金林
Owner SHANDONG UNIV
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