基于Taguchi方法的三相混合式步进电机电磁结构优化

Electromagnetic Structure Optimization of Three-Phase Hybrid Stepping Motor Based on Taguchi Method

混合式步进电机的齿层区域是其产生转矩的关键。为了实现特定性能,电机设计时需要选择适当的齿层几何形状。文中以梯形齿形状参数为优化对象,对电机进行电磁结构优化,以实现更高的转矩输出。以市场现有的一款三相混合式步进电机为样机,基于其结构参数,建立高效的三维有限元模型以产生优化的样本。然后,再结合Taguchi优化算法,以定转子的齿形状参数为优化设计变量,通过数值方法获取最佳梯形齿形结构,使电机输出转矩最大化。优化后,转矩最大化样机的转矩峰值提高了近25%,证明了该优化方案的有效性。

The tooth layer area of a hybrid stepping motor is the key to its torque generation.To achieve specific performance,the appropriate tooth layer geometry needs to be selected during motor design.In this study,the shape parameters of the trapezoidal tooth are optimized,and the electromagnetic structure of the motor is optimized to achieve a higher torque output.Specifically,an existing three-phase hybrid stepping motor in the market is used as a prototype.Based on its structural parameters,an efficient three-dimensional finite element model is established to generate optimized samples.Then,combined with the Taguchi optimization algorithm,the stator and rotor tooth shape parameters are used as optimization design variables to obtain the best trapezoidal tooth structure through numerical methods to maximize the motor output torque.After optimization,the torque peak of the torque-maximizing prototype is increased by nearly 25%,which proves the effectiveness of the optimization scheme.