In this article, a novel method is proposed to reduce the dc-link capacitance of the brushless dc motor (BLDCM) system. In the proposed strategy, the charging mode of dc-link capacitor is designed to improve the energy stored by dc-link capacitor in the charging process instead of reducing the discharge time of dc-link capacitor used in previous article. The new modulation strategy and controller is designed to pump the dc-link capacitor voltage and ensure that it exceeds the ac voltage peak. The proposed modulation strategy has three vectors. The charging vector is used to improve the dc-link capacitor voltage, and the effective vector and zero vector are used to adjust the motor speed. For practical application, we provide an engineering calculation method to get the dc-link capacitance, and prove that the dc-link voltage can exceed the average voltage of the BLDCM. The experimental results verify the correctness of the theoretical analysis and the feasibility of the proposed method.

中文翻译：

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一种新颖的升压调制策略，可减少无刷直流电机驱动器的直流链路电容


本文提出了一种减少无刷直流电机 (BLDCM) 系统直流母线电容的新方法。在所提出的策略中，直流母线电容器的充电模式被设计为提高直流母线电容器在充电过程中存储的能量，而不是减少前文中使用的直流母线电容器的放电时间。新的调制策略和控制器旨在泵送直流母线电容器电压并确保其超过交流电压峰值。所提出的调制策略具有三个向量。充电矢量用于提高直流母线电容器电压，有效矢量和零矢量用于调节电机速度。针对实际应用，我们提供了一种工程计算方法来获得直流母线电容，并证明直流母线电压可以超过BLDCM的平均电压。实验结果验证了理论分析的正确性和所提方法的可行性。