关键词: 有限元法, 响应面法, 转矩波动系数, 起动转矩, 输出转矩

Abstract:

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.

Key words: finite element method, response surface method (RSM), torque ripple coefficient, starting torque, output torque