This paper presents a novel electrolytic capacitor-less (ECL) power decoupling circuit and control strategy. According to the relationship between the pulsating power of the power grid and the motor power, the circuit realizes power decoupling between the grid and the motor, which effectively suppresses the DC bus voltage fluctuation. Based on the characteristics of this circuit, a predictive control algorithm is proposed to improve the input power factor of the ECL drive system and simplify the controller design. The reason of motor torque ripple is derived and analyzed. An active damping algorithm is proposed to suppress the motor torque ripple, which improves the stability of the system. The permanent magnet synchronous motor (PMSM) drive system is constructed based on this novel circuit. The simulation and experiment show the effectiveness and superiority of theoretical analysis.
张超, 胡鑫, 朱孝勇, 徐磊, 杜怿. 基于预测控制的无电解电容功率变换器电机驱动系统[J]. 电工技术学报, 2018, 33(24): 5649-5658.
Zhang Chao, Hu Xin, Zhu Xiaoyong, Xu Lei, Du Yi. Electrolytic Capacitor-less Motor Drive System Based on Predictive Control. Transactions of China Electrotechnical Society, 2018, 33(24): 5649-5658.
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