弧形永磁同步电机设计与优化

摘要

For the traditional motor can’ t meet the requirment of the super test instrument, a kind of arc permanent magnet synchronous motor ( arc PMSM) was introduced. The cogging force of the arc PMSM was used. Finite element analysis ( FEA) was carried out to analyze the cogging force of arc PMSM by u-sing planar cross sections. By adopting optimization methods, such as adjusting the length of stator and a-dopting fractional slot, the end cogging force decreased from 5. 1 N·m to 1. 6 N·m, and the slot cog-ging force decreased from 6. 0 N·m to 0. 67 N·m accordingly. Both simulation and experimental results show that the total toque ripple reduced from 4% to 1. 8%.%对于超大型的精密测量设备，传统的传动方式已经不能满足实际应用需求。介绍了一种基于弧形永磁同步电机驱动方式。为了解决弧形永磁同步电机力矩波动较大的问题，采用有限元分析的方法来仿真分析电机的边端力矩和齿槽力矩。通过调整电机定子铁心的圆周方向的长度，电机的边端力矩从优化前的5．1 N·m下降到1．6 N·m；通过采用分数槽结构的方法，电机的齿槽力矩从6．0 N·m下降到0．67 N·m。仿真和实验结果表明电机的力矩波动从原来的4%下降到1．8%，证明该种方法的有效性。