说明：  本课题为研究大功率永磁无刷直流电机及其驱动系统而设计了一台50kW多相永 磁无刷直流电机，该电机的设计大限度地模拟了某大功率多相永磁无刷直流电机的基本结构，驱动系统也基本采用了某大功率永磁无刷直流电机的主电路结构。本文以该电机为分析和研究对象，对大功率永磁无刷直流电机及其驱动系统的工作原理、参数选取和电机工作情况进行了分析、总结和预测，为大功率永磁无刷直流电机及其驱 动系统的研制提供了宝贵的经验。
(In order to investigate the performance of one kind of high-power PMBDCM drive system, a 50kW multi-phase permanent magnet brushless DC sample motor is developed in this dissertation. The sample motor is strictly referred to one high-power PMBDCM, and the structure of drive system is also accorded to the high-power PMBDCM drive system. By dint of the sample motor drive system, this dissertation has expounded the operation principle, discussed the parameter choice and analyzed experimental data, and then some valuable conclusions were drawn for the high-power PMBDCM drive system.)