介绍了与车轮一体式牵引电动机的开发概况及部分成果。该牵引电动机使用永磁同步电动机（使用 Ｎｄ－Ｆｅ－Ｂ系永久磁铁），采用直接驱动方式，与旧式减速齿轮式感应电动机相比，具有减少维修，提高效率，结构简单，改善运行状况及提高曲线通过速度等优点。另外，还介绍了为该系统开发的电流控制系统以及控制系统中所用逆变器的结构特点。 This paper introduces the development overview and some achievements of integrated traction motor with wheels. The traction motor using permanent magnet synchronous motor (using Nd-Fe-B permanent magnet), the use of direct drive mode, compared with the old reduction gear induction motor, with reduced maintenance, improve efficiency, simple structure, improve operating conditions and improve Curve through speed and so on. In addition, the structural characteristics of the current control system developed for the system and the inverters used in the control system are also described.