Abstract：The current source converter (CSC) is widely used in long cable drives and medium voltage drives due to its friendly output voltage and short-circuits protection capability. The filter capacitor of the CSC and the electromagnetic dynamics equation of the motor constitute a second-order system, which has a natural resonance frequency. In this paper, the input variables are solved to achieve the deadbeat control performance based on the mathematical model of the control plant. Then, we put the dq-axis current, output capacitance voltage and switch penalty term in a unified cost function, and a predictive torque control (PTC) strategy with full state variables (FSV) is proposed. The proposed FSV-PTC can effectively suppress the energy oscillation between the filter capacitor and the stator inductance, and reduce the torque ripple. Moreover, the design criteria of sampling frequency and switch penalty weight factor is given. Finally, the control performance of the CSC-fed permanent magnet synchronous drive system is verified through hardware-in-the-loop (HiL) test. The test results show that the proposed FSV-PTC has a small steady-state torque ripple and fast torque response.
李昱, 郭宏, 平朝春, 王晓辉, 张祯滨. 基于电流源变流器的永磁同步电机驱动系统全状态变量预测转矩控制[J]. 电工技术学报, 2021, 36(1): 15-26.
Li Yu, Guo Hong, Ping Zhaochun, Wang Xiaohui, Zhang Zhenbin. A Full-State Variable Predictive Torque Control of Current Source Converter Fed Permanent Magnet Synchronous Motor Drives. Transactions of China Electrotechnical Society, 2021, 36(1): 15-26.
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