关键词: 永磁直流电机, 齿槽转矩, 参数优化

Abstract: To effectively reduce the cogging torque of the motor and ensure its comprehensive performance,this paper proposes a parametric optimization modeling method based on the co-simulation of Maxwell and Workbench. Sensitivity analysis of cogging torque is carried out for the rotor slot structural parameters to accurately screen out the key parameters with significant impacts. Taking the minimization of cogging torque as the optimization objective and setting constraint conditions in combination with various motor performance indicators, the response surface method and multi-objective genetic algorithm are adopted to complete the parametric optimization design. The simulation results show that the cogging
torque of the optimized motor is reduced from 19. 305 1 mN · m to 8. 300 2 mN · m,with a reduction rate of 57%,and the motor output characteristics and other performance indicators all meet the design requirements. This method provides an efficient and reliable technical approach for the cogging torque suppression and parametric optimization of motors,and has good engineering application value.

Key words: permanent magnet direct current motor, cogging torque, parametric optimization