Thrust ripple such as end force,slot force and normal force are key factors that affect the properties of permanent magnet linear synchronous motors(PMLSM).According to different mechanics and analytical models,end fo...Thrust ripple such as end force,slot force and normal force are key factors that affect the properties of permanent magnet linear synchronous motors(PMLSM).According to different mechanics and analytical models,end force resulting from open magnetic circuit of PMLSM was greatly decreased by optimizing the length of the PMLSM mover.Slot force caused by slot effect was greatly reduced by using fraction slot structure,and normal force was calculated through the finite element method(FEM).After thrust ripple was calculated,its uniform formula was obtained through Fourier series nonlinear regression.An experimental system was set up to measure thrust ripple,and experiment results demonstrated that experimental force ripple was quite in line with that calculated by the fit-ting formula.The optimal theory and analysis method is ef-fective,and the obtained formula can be utilized to com-pensate thrust ripple in practical applications and improve the motion performance of PMLSM.展开更多
基金supported by the National Natural Science Foundation of China(No.50475101).
文摘Thrust ripple such as end force,slot force and normal force are key factors that affect the properties of permanent magnet linear synchronous motors(PMLSM).According to different mechanics and analytical models,end force resulting from open magnetic circuit of PMLSM was greatly decreased by optimizing the length of the PMLSM mover.Slot force caused by slot effect was greatly reduced by using fraction slot structure,and normal force was calculated through the finite element method(FEM).After thrust ripple was calculated,its uniform formula was obtained through Fourier series nonlinear regression.An experimental system was set up to measure thrust ripple,and experiment results demonstrated that experimental force ripple was quite in line with that calculated by the fit-ting formula.The optimal theory and analysis method is ef-fective,and the obtained formula can be utilized to com-pensate thrust ripple in practical applications and improve the motion performance of PMLSM.
