Twice ripple power exists in single-phase to three-phase reduced-switch induction motor drives, which degrades the performance of the drive system, such as larger total harmonic distortion of the grid current, the larger ripple voltage in the dc link and the larger torque ripple. Most existing power decoupling schemes are open-loop decoupling methods. However, the open-loop decoupling method has the disadvantages of heavy computation and strong dependency of parameters. This paper analyzes all steady state solutions of the decoupling capacitor voltage from the point of view of solving differential equations and presents a unified multi-proportional-resonant closed-loop decoupling method to suppress the ripple voltage on the dc bus. The whole drive system adopts a hybrid predictive control strategy with dual loops to coordinate the operation of each part. Comprehensive experimental results are presented to verify the effectiveness of the presented method.

中文翻译：

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用于缩减开关转换器馈电 IM 驱动器的通用闭环功率去耦控制

单相到三相减开关感应电机驱动器中存在两倍的纹波功率，这会降低驱动系统的性能，例如电网电流的总谐波失真较大、直流链路中的纹波电压较大以及较大的转矩脉动。大多数现有的电源去耦方案是开环去耦方法。但是开环解耦方法存在计算量大、参数依赖性强的缺点。本文从求解微分方程的角度分析了去耦电容电压的所有稳态解，提出了一种统一的多比例谐振闭环去耦方法来抑制直流母线上的纹波电压。整个驱动系统采用双回路混合预测控制策略，协调各部分运行。给出了综合实验结果以验证所提出方法的有效性。