Multi-objective optimization design of hybrid excitation doubly salient motor based on Taguchi method

Hybrid excitation doubly salient motor (HEDSM) is suitable for aviation starter/generator because of the advantages of high-power density, high reliability and flexible control. However, the salient pole and slot structure can cause high torque ripple and serious nonlinear magnetic field distribution. In this paper, we present a multi-objective optimization design approach for the HEDSM. In order to increase the output torque of the motor and reduce the torque ripple of the motor, the Taguchi method is used to optimize parameters of the motor. The ANOVA is often used in traditional Taguchi method to analyze the data of orthogonal experiments to determine the final optimization result, but it is more suitable for single-objective optimization. Therefore, the grey relational analysis (GRA) is used instead of ANOVA to improve the Taguchi method, so as to complete the multi-objective optimization design of the motor. Finally, the simulation and analysis of characteristics for the HEDSM verifies the effectiveness of the optimization method, which enriches the rapid design and optimization methods of this kind of doubly-salient motors.

I. Introduction

Doubly salient motor (DSM) has gradually become one of the preferred motor types for aviation starter/generator due to its advantages of simple and robust structure, safety of use and high-speed operation, which has gradually attracted extensive attention and research from scholars in the field of motor at home and abroad in recent years [1] - [2].