Abstract：Aiming at the problem of bus voltage oscillation in permanent magnet synchronous drive motor system with LC filter in DC drive system, this paper designed an oscillation suppression strategy based on inverter voltage. Firstly, the small-signal analysis method was used to model the motor and LC filter, and the stability of the system was analyzed from the point of view of the system's impedance match. The damping signal was injected into the inverter reference voltage of pulse width modulation, which increases the input impedance of the motor, avoids the mutual influence of the input and output impedances, and keeps the system stable. Simultaneously, in order to avoid the phase deviation of signal extracted by the traditional filter, a signal extraction structure was designed by combining phase locked loop and low pass filter. This structure improves the extraction precision of damping signal, and thereby improving the damping compensation effect of the inverter voltage compensation. Finally, simulation and hardware in the loop experimental platform verified the effectiveness of this method.
张珍睿, 刘彦呈, 杨鹏明, 郭昊昊, 梁晓玲. 直流供电下的永磁同步电机驱动系统母线电压振荡抑制策略[J]. 电工技术学报, 2022, 37(12): 2982-2991.
Zhang Zhenrui, Liu Yancheng, Yang Pengming, Guo Haohao, Liang Xiaoling. Suppression Strategy of Bus Voltage Oscillation for PMSM in DC Power Supply Drive System. Transactions of China Electrotechnical Society, 2022, 37(12): 2982-2991.
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