中文摘要：

分析了直驱转向架宜采用永磁同步电机的原因,阐述了直驱转向架的结构特点,对直驱转向架的动力学性能分析表明,与传统转向架相比,直驱转向架在结构简化、可靠性及电机效率等方面有显著优势,很适合在城轨车上应用。

英文摘要：

Reasons of bogie driven directly adopting PMSM（permanent magnet synchronous motor） were analyzed,and structure features of bogie driven directly were expounded.With dynamic performance analysis,bogie driven directly was shown have outstanding advantages in terms of structure simplified,reliability and motor＇s efficiency compared with traditional bogie,which was very suitable for applied in urban rail transport field.