Response Analysis and Stator Optimization of Ultrahigh-Speed PMSM for Fuel Cell Electric Air Compressor

For the requirement of the complex dynamic performance for the fuel cell vehicle (FCV), the wide operation range and rapid dynamic response ability are essential to the fuel cell electric air compressor, which are limited by the output torque of the permanent magnet synchronous motor (PMSM) commonly used in FCV. The purpose of this study is to improve the output torque of the stators and its rapid dynamic response capacity of PMSM using the mathematical model, multiobjective optimization, and experimental validation. First, a mathematical model of speed regulation response of ultrahigh-speed PMSM is established, which provides a basis for Taguchi legal suboptimization in this study. Second, stator parameters were selected as optimization variables based on the Taguchi method, and the optimal combination of optimization variables was selected with the maximum electromagnetic torque, minimum cogging torque, minimum stator copper loss, and minimum stator iron loss as optimization objectives. Finally, the effectiveness of the optimization method is verified by simulation analysis and bench test. At the target speed of 110652, 124364, and 146876 r/min, the overall response times before optimization are 1.9386, 2.3902, and 2.7844 s, respectively, and the overall response times after optimization are 1.8604, 2.2856, and 2.6132 s. The speed response time after optimization is 0.0782, 0.1046, and 0.1712 s less than before optimization.