汽车天窗电机设计参数对齿槽转矩影响及优化

Influences of design parameters on cogging torque and optimization of low noise sunroof motor

提出天窗电机主要参数对齿槽转矩影响分析及其电磁优化设计模型研究。在阐述天窗电机基本结构和齿槽转矩产生机理基础上,以某汽车天窗电机为例,针对极槽配合和极弧系数设计以及转子静态偏心时的电机齿槽转矩进行计算,得到电机主要设计参数对电机齿槽转矩大小的影响规律。最后,以天窗电机齿槽转矩最小为目标,建立基于遗传算法的电机优化设计模型,获得了最优槽口宽、极弧系数和斜槽个数的设计方案,优化后的齿槽转矩明显小于原始设计方案。

The effects of main design parameters of sunroof motor on cogging torques and electromagnetic design optimization models were investigated. Based on the basic structure of the vehicle sunroof motor and mechanism of the produced cogging torques, regarding for a real vehicle sunroof motor, the cogging torques were calculated Considering with the slot-pole match and pole-arc coefficient selection and differ- ent rotor static eccentricity, and the rules of effects of main design parameters of the sunroof motor on the cogging torque were obtained. Finally, based on the objective function of the minimization of cogging torques of the sunroof motor, models of electromagnetic design optimization were established with the genetic algorithm, the optimal parameters of the slot width, pole-arc coefficient and numbers of skew slots have been obtained. The amplitude of the cogging torque of the optimized design is obviously smaller than that of the initialized design.