哈尔滨工程大学学报Issue(2)：241-246,6.DOI:10.11990/jheu.201511020
不等距圆筒型永磁直线电机推力波动研究
Research on thrust fluctuation of tubular permanent-magnet linear synchronous motors with unequal pole-pitch
摘要
Abstract
Cogging force and ripple thrust are the main factors that cause thrust fluctuation in permanent magnet linear synchronous motors(PMLSM).Cogging force is analytically analyzed by using the energy and Fourier analysis method.This study proposes the unequal stator and rotor pole-pitch method to weaken the cogging force of motor for the integer slot winding type of permanent magnet linear synchronous motor.In addition,a principle for weakening the cogging force of a PMLSM is analyzed,and the formula of rotor pole-pitch selection is given.The research shows that the application of a suitable rotor pole pitch can lower the harmonic content in the no-load potential and further inhibit the ripple thrust caused by the no-load harmonic potential.Finite element analysis and prototype experiments show that the cogging force is effectively weakened,the harmonic content of the no-load back EMF is lowered and the thrust fluctuation is effectively suppressed.关键词
推力波动/齿槽力/极距/圆筒型永磁同步直线电机/纹波推力Key words
thrust fluctuation/cogging force/pole pitch/permanent magnet linear synchronous motors(PMLSM)/ripple thrust分类
信息技术与安全科学引用本文复制引用
任宁宁,李槐树,薛志强,周羽..不等距圆筒型永磁直线电机推力波动研究[J].哈尔滨工程大学学报,2017,(2):241-246,6.基金项目
国家自然科学基金项目(51507180). （51507180）
