摘  要：高速永磁无刷直流电机具有功率密度高、体积小、效率高等优点，在很多领域有着广泛的应用。转子动力学分析是高速无刷直流电机面临的主要问题之一。结合所研制的2.3 kW， 150 000 r/min高速无刷直流电机，设计了单端式轴承支撑结构和两端式轴承支撑结构两种不同的转子，并对两种结构进行了转子动力学分析，表明双端式结构的电机在100 000 r/min下运行平稳。
关键词：高速电机；无刷直流电机；转子动力学；设计

Abstract: High speed permanent magnet brusbless DC motors have been extensively developed and employed in industry applications,due to high efficiency and high power density.Rotor dynamic analysis is a key problem.Based on a developed 2.3 kW,150 000 r/min high speed permanent magnet brusbless DC motor,rotor dynamics of two kinds of rotor structures are comparatively studied.
Key Words: High speed motor;Brushless DC motor;Rotor dynamic;Design