This paper presented a new idea of using a DC generator as a permanent magnet synchronous motor (PMSM) load. Based on it, controlled the DC generator armature current to simulate typical PMSM load system has been proposed. The simulator controller is basically composed of by exciting current controller and armature current controller. In order to increase performance of the proposed device, an improved Composite control strategy for armature current was discussed. Meanwhile, build a base on TMS320LF2407DSP load simulator system has been developed, Very encouraging results are obtained.