中国电机工程学报2011，Vol.31Issue(30)：69-76,8.
基于非线性电感分析的永磁直线同步电机电磁推力特性研究
Research on Thrust Characteristics in Permanent Magnet Linear Synchronous Motor Based on Analysis of Nonlinear Inductance
摘要
Abstract
Analytical models of thrust characteristics in permanent magnet linear synchronous motor are generally presented with constant inductance.The effects of saturation and longitudinal end are neglected.In order to analyze the thrust characteristics with load,a new non-linear magnetic circuit analytic model was suggested.This analytic model which considered saturation phenomena and longitudinal end effect,not only could calculate steady-state inductance,but also calculated transient-state inductance.So the dynamic inductance was obtained as a function of magnet position and current.Meanwhile,it also present the fundamental reasons about the inequality of stable inductance of the three-phase winding.After d-q transforming and calculating,the electromagnetic thrust formula,which included all the influence form saturation phenomena,position and longitudinal end effect was obtained.According to this formula,the ripple caused by saturation phenomena was a major part of the thrust fluctuation.The amplitude of the fluctuation had a square relationship with current.It meant that thrust characteristics become worse when the load increases.Finally,a new shape of the teeth and a method to compensate current into the current loop was suggest,which could decrease the speed ripple about 70%.关键词
永磁直线同步电机/电磁推力特性/电感Key words
permanent magnet linear synchronous motor（PMLSM）/thrust characteristics/inductance分类
信息技术与安全科学引用本文复制引用
刘成颖,王昊,张之敬,沈祥明..基于非线性电感分析的永磁直线同步电机电磁推力特性研究[J].中国电机工程学报,2011,31(30):69-76,8.基金项目
“十一五”国家科技支撑计划重大项目（2006BAF01B09-05) （）
