Research on Optimized control technique of Electrical vehicles propulsion system with dual PMSM connection

This paper proposes an optimized control strategy for dual PMSM propulsion system that is both energy efficient and fault tolerant. A proposed control scheme using a single Digital Signal Processor (DSP) to drive inverter supplying voltage directly to two separate motors is described. Based on the estimation of the real-time load condition and the efficiency optimization strategy, DSP coordinates the work between the two motors, and then improves the global efficiency of the propulsion system notably. Fault-tolerant strategy based on the master-slave motor mode is also discussed to ensure the reliability of the system both under health and various faulty conditions. The paper presents the details of the experimental setup. And experimental results show that this optimized technique can improve the combined efficiency of the system, particularly in low-speed and low-load conditions.