A vector control method based on three-degree-of-freedom internal model control(3 DOF-IMC) for permanent magnet synchronous motor(PMSM) is proposed in this paper, to solve the problem that the traditional internal model control(IMC) method cannot tune the performances of tracking capability, disturbance rejection and robustness independently. The proposed method analyzes the stability and robustness based on the vector control system of PMSM. The 3 DOF-IMC controllers contain feedback controller, feedback f...