Permanent magnet synchronous motors (PMSM) are appropriate for applications with load-independent speeds or synchronous operation with high accuracy under defined speed. In this paper analysis the structure and equations of the PMSM, direct torque

空间适量调制的仿真，因为控制矢量比较难理解，通过此模型的仿真，便于我们对它的理解。-Space vector modulation simulation, because the control vector is more difficult to understand, through the simulation of this model, to facilitate its understanding