Research on Stator Iron Loss of Ultra-high-speed Permanent Magnet Motor for Hydrogen Fuel Cell Air Compressor

With the increasing demand for speed and power of finite volume high-speed permanent magnet motor system, the design of motor is generally faced with the challenges of high harmonic content of air gap magnetic field and current, changing load conditions and high working temperature. In this paper, combined with the operating conditions of high-speed permanent magnet motor, it is of great significance to study stator iron consumption. Taking the ultra-high-speed permanent magnet (UHS-PM) motor for a 22kW/90000rpm hydrogen fuel cell air compressor as an example, the electromagnetic scheme is designed, and a two-dimensional finite-element analysis model is established. By dividing the stator core area of the motor. The variation law of magnetic density is analyzed, and the effects of current harmonics and rotational magnetization are studied. A UHS-PM motor for hydrogen fuel cell air compressor is developed and verified by experiments. The simulation analysis shows that the current time harmonic has a great influence on iron core eddy current loss and small effect on the iron core hysteresis loss, in a certain range, with the increase of carrier and modulation ratio, the current distortion rate decreases with the reduction of iron loss. Compared with the sine wave power supply, the simulated loss of the inverter power supply simulation is closer to the experimental data of the prototype, which further verifies the accuracy of the simulation analysis method.