永磁直线同步电机推力波动优化及实验研究  

THRUST RIPPLE OPTIMIZATION AND EXPERIMENT FOR PMLSM

作　　者：徐月同[1] 傅建中[1] 陈子辰[1] 

机构地区：[1]浙江大学现代制造工程研究所,浙江省杭州市310027

出　　处：《中国电机工程学报》2005年第12期122-126,共5页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50475101); 国家863计划(2002AA421150); 浙江省科技计划重点科研项目(011103979)~~

摘　　要：由边端力、齿槽力及法向吸力引起的推力波动是影响永磁直线同步电机(PMLSM)运动性能的主要因素。通过优化电机动子长度方法降低边端力,采用分数槽结构方法降低齿槽效应引起的齿槽力,利用有限元方法计算PMLSM法向吸力,并采用傅立叶级数进行非线性回归分析,得到PMLSM推力波动统一公式。实验表明PMLSM进给单元推力波动实验值与理论值基本一致。证明了优化理论及分析方法的正确性。因此,在实际应用中,可利用得到的公式对推力波动进行补偿,提高永磁直线同步电机的运动性能。Force ripple such as end force, slot force and normal force was key factor which affected the properties of Permanent Magnet Linear Synchronous Motors (PMLSM). End force was greatly decreased by optimizing the length of the PMLSM mover, and slot force caused by slot effect was greatly reduced by using fraction slot structure, and normal force was calculated though Finite Element Method. Then the uniform formula of force ripple was obtained through Fourier series nonlinear regress. Experiments demonstrate that experimental force ripple is quite coincident with that calculated by the fitting formula. So the optimal theory and analysis method is effective, and the obtained formula can be utilized to compensate thrust ripple in practical application and improve the motion performance of PMLSM.

关 键 词：永磁直线同步电机 推力波动 实验研究 PMLSM 非线性回归分析 运动性能 有限元方法 傅立叶级数 齿槽效应 结构方法 统一公式 进给单元 优化理论 分数槽 理论值 实验值 正确性 吸力 法向 补偿 

分 类 号：TM351[电气工程—电机] TM359.4