In order to improve the steady and dynamic performance of the direct torque control(DTC) for open-winding permanent magnet synchronous machine(OW-PMSM) with the isolated dual power source, a three-voltage vector model predictive torque control(TVMPTC) strategy is proposed in this manuscript. The reference voltage vector is predicted directly by deadbeat model predictive torque control, based on the analysis of the coordinated modulation method for the dual-inverter, the three-voltage vector selection scheme in different sectors is given. With the elimination of the traditional inner loop regulator, the proposed control strategy could effectively improve the dynamic performance of the OW-PMSM driving system Finally, the experimental results of the proposed system have been implemented to verify the effectiveness and feasibility of the proposed TVMPTC strategy for OW-PMSM under the variable DC bus voltage condition.

Open winding permanent magnet synchronous machine; three-voltage vector model predictive torque control; coordinated modulation method; three-voltage vector selection scheme; variable DC bus voltage condition