内置式V型永磁同步电机齿槽转矩优化

Cogging torque optimization of built-in V-type permanent magnet synchronous motor

为削弱永磁同步电机的齿槽转矩,通过基于能量法的齿槽转矩解析表达式量化极弧系数对齿槽转矩的影响,将V型永磁同步电机转子结构的复杂几何关系归纳为4个设计变量,使用4个变量的正交表对齿槽转矩进行优化设计,并通过有限元仿真得到使齿槽转矩取最小值的最优设计变量组合。对比优化前、后齿槽转矩峰值可知,所提出的基于田口法的优化设计方案能有效削弱永磁同步电机的齿槽转矩。

To reduce the cogging torque of permanent magnet synchronous motor,the influence of pole-arc coefficient on cogging torque is quantitated using analytical expression of cogging torque based on energy method.The complex geometric relationship of rotor structure of V-type permanent magnet synchronous motor is divided into four design variables.The cogging torque is optimized using four-variables orthogonal table.The optimal combination of design variables to minimize cogging torque is obtained by finite element simulation.The peak value comparison of cogging torque before and after optimization shows that the optimal design based on Taguchi method can effectively reduce cogging torque of permanent magnet synchronous motor.