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一种两种磁体混合励磁的高速永磁同步电机转子结构及性能分析

The Rotor Structure and Performance Analysis of a Two Magnet-hybrid Excitation High Speed Permanent Magnet Machine
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摘要 针对表面式转子结构高速永磁同步电机的气隙磁密分布的优化问题,提出一种两种磁体混合励磁的转子结构方案,其励磁磁体由两种磁性能不同的永磁材料按照一定规律沿周向分布而成,使得气隙磁密分布趋于正弦波。本文阐述了该种转子结构的设计原理,并采用有限元分析方法对比分析了不同转子结构的性能差异,最后,通过样机和试验初步验证了该结构方案的可行性。结果表明,该种转子结构方案不仅可以有效削弱气隙磁密中的高次谐波,从而减少定子铁耗,而且可以显著降低转子的涡流损耗,抑制转矩脉动,特别适用于极对数较少或转子外径较大的表面式高速永磁电机的设计场合。 This paper presents gwa two-magnet hybrid excitation rotor structure of high speed permanent magnet machine aim at flux density optimization,in which the permanent magnet is consist of two magnets with different magnetic prosperity and distributed with special rule along with the rotor rim to optimize the air gap flux density to sinusoidal distribution.The basic principle and design characteristic is introduced,and performance analysis is carried out based on FEM,and the principle and performance is preliminarily verified by the experiments.The results show that the scheme could not only weaken the high harmonic components and relative stator loss,but also decrease the eddy current loss in rotor,which is especially fit for high speed situation.
作者 张经纬 柳长江 王刚 杨高 ZHANG Jinei;LIU Changjiang;WANG Gang;YANG Gao(Wuhan Institute of Marine Electric Propulsion,Wuhan 430064,China)
出处 《大电机技术》 2020年第6期21-26,32,共7页 Large Electric Machine and Hydraulic Turbine
关键词 高速永磁同步电机 混合励磁 气隙磁密优化 high speed permanent magnet machine hybrid excitation air gap flux density optimization
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