Abstract：Permanent magnet synchronous motors are widely used in marine electric propulsion due to its excellent torque characteristics and wide range of speed regulation. Sensorless control is of significance for the reliability service of the marine electric propulsion system. However, the measurement error of the stator phase current generally results in speed and torque ripple and estimation error of rotor position. To this end, by analyzing the principle of measurement error and the subsequent influence on the performance of motor speed control system, it is concluded that the offset error and the gain error will cause the torque and speed pulsation at fe and 2fe, respectively. Based on the above analysis, a compensation strategy is proposed to eliminate the measurement error of q axis current. In this strategy, the speed pulsating component at fe and 2fe are calculated first and then the q axis current measurement error Δiq is obtained by backward calculation so as to obtain the true q axis current value via error compensation algorithm and to eliminate the disturbance of measurement error on motor torque. Simulation and experimental results show that the proposed phase current measurement error compensation algorithm can reduce the periodic ripple of torque and speed of permanent magnet synchronous motor.
陈再发, 刘彦呈, 朱鹏莅. 相电流测量误差补偿在船舶永磁同步电机无位置传感器控制中的应用[J]. 电工技术学报, 2018, 33(zk2): 411-419.
Chen Zaifa, Liu Yancheng, Zhu Pengli. Application of Phase Current Measurement Error Compensation in Sensorless Control of Marine Permanent Magnet Synchronous Motor. Transactions of China Electrotechnical Society, 2018, 33(zk2): 411-419.
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2018, Vol. 33 
