基于响应面法的永磁电机转矩多目标优化

Multi-Objective Optimization of Torque for Permanent Magnet Motor Based on Response Surface Method

为优化一台36槽8极的表贴式永磁同步电机的输出转矩,以优化转矩波动系数、起动转矩值、输出转矩均值为目标,选择对电机转矩参数影响较大的磁钢厚度、磁钢偏心距、极弧系数3个电机参数进行优化。应用基于中心组合设计(CCD)的方法,构造实验样本数据组;通过有限元仿真分析,对响应面模型函数拟合回归;通过方差分析对模型的合理性进行评价;利用Design-Expert软件分析并求得最优参数解。结果表明,基于响应面法(RSM)的优化方法,能有效抑制转矩波动,提高输出转矩和起动转矩的幅值。

In order to optimize the output torque of a 36 slots and 8 poles surface-mounted permanent magnet synchronous motor,taking the torque ripple coefficient,the starting torque amplitude and the mean value of output torque as the targets,the three optimization parameters,including the thickness of the magnet,pole arc coefficient and eccentricity,were selected which have great influence on the torque.The sample data sets was structured based on central composite design(CCD).Through the finite element simulation analysis,the response surface model function was fitting.Through the variance analysis to evaluate the rationality of the model,the optimal parameter solution was got by Design-Expert software.The results show that,the optimization method based on response surface method(RSM)can effectively reduce the torque ripple coefficient and improve the mean output torque and starting torque amplitude.