内置式一字型永磁同步电动机磁极结构优化设计

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Abstract This paper presents a shuttle shaped eccentric permanent magnet pole shape with unequal thickness based on a known type of 12 slots and 10 poles of traditional interior “—” type permanent magnet synchronous motor. Firstly, an analytical model of the shuttle-type pole structure with different thickness is derived by taking sinusoidal degree of the no-load air-gap flux density and cogging torque as the optimization objectives. Then, the equivalent magnetic circuit model of interior permanent magnet synchronous motor is deduced, and the program is written to solve the calculation in Matlab. The finite element analysis software is used for simulation. The calculation and simulation results show that the structure of the shuttle eccentric pole with different thickness can effectively improve the sinusoidal degree of the no-load air gap magnetic density waveform while weakening the cogging torque.

Key words： interior permanent magnet synchronous motor air-gap magnetic density pole shape cogging torque

Received: 03 April 2021

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	XIAO Xinhui
	LAN Zhiyong
	CAI Bingbing

Cite this article:

XIAO Xinhui,LAN Zhiyong,CAI Bingbing. Optimization of pole structure of interior “—” type permanent magnet synchronous motor[J]. Electrical Engineering, 2021, 22(11): 7-11.

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http://dqjs.cesmedia.cn/EN/Y2021/V22/I11/7

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