永磁同步电机损耗计算及温度场分析综述OA

Permanent magnet synchronous motor(PMSM)is adopted as the core of electric vehicle drive systems due to high efficiency,wide speed range,high power density and excellent control performance.However,with the continuous improvement of power density,heat generation induced by motor losses is regarded as an increasingly severe problem,and temperature rise is taken as a non-negligible challenge.Motor components are damaged,material aging is accelerated,and service life is shortened by excessive temperature rise.Meanwhile,the operational reliability of the entire drive system is seriously impaired.Therefore,investigation on the temperature field of PMSMs is considered extremely essential.The sources and calculation methods of motor losses are systematically analyzed,heat transfer paths and thermal mechanisms are discussed,and the technical bottlenecks existing in each research link are comprehensively summarized.The research on temperature field of permanent magnet synchronous motors is regarded as a core technical problem to be urgently solved.