Abstract Affected by factors such as manufacturing process and use environment, the current sensor may fail when the permanent magnet synchronous machine drive system is running. To improve the fault-tolerant control ability of the system, a new vector control strategy using a single current sensor is proposed based on the adaptive observer. First, the mathematical model of the current adaptive observer is established in the rotating reference frame; then, the coordinate transformation and low-pass filtering are carried out for the only measurable phase current to calculate the current error information, which is needed by the current adaptive observer. Finally, the particle swarm optimization (PSO) algorithm is employed to design the observer parameters. The hardware-in-the-loop real-time simulation results show that compared with the traditional method, the proposed method has better dynamic and steady-state performance, higher torque control accuracy, and good robustness to motor parameters.
Xiao Fei,Xu Guanda,Lian Chuanqiang等. Three-Phase Current Reconstruction Strategy of Permanent Magnet Synchronous Machine Drives Using a Single Current Sensor[J]. Transactions of China Electrotechnical Society, 2022, 37(7): 1609-1617.
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2022, Vol. 37 
