削弱反磁通电机齿槽转矩的两种新方法

Two New Methods to Reduce Cogging Torque in Flux Reversal Machine

由于定子上永磁体的存在和定转子双凸极齿槽结构,反磁通电机不可避免地存在齿槽转矩,齿槽转矩会引起电机的振动和噪声问题,对于低速运行和要求平稳运行的场合不容忽视,严重时甚至会影响电机的正常运行。本文提出削弱反磁通电机齿槽转矩的两种新方法:转子分段法和定子极弧宽窄成对加转子分段法,通过电磁场有限元分析,证明这两种方法在基本不影响反磁通电机感应电动势的前提下,很好地削弱了齿槽脉动转矩。这两种方法制造工艺简单可行。

As the existence of the magnets on the stator and doubly salient structure, the flux reversal machine（FRM） can not avoid cogging torque. The cogging torque of FRM may cause some problems like noise and vibration that could not be ignored in the occasion of low-speed and smooth operation. It will even affect the normal operation of the motor. Two new methods are proposed in this paper. One is segmented rotor method and the other is stator poles pairing with segmented rotor method. The analysis by electromagnetic finite element method proves that the methods can weaken the cogging torque. At the same time, it also does not influence the inductive electromotive force of FRM. The manufacturing process of each method is simple and feasible.