【摘要】 本文深入研究了空间矢量调制模式下的三电平逆变器中点电压波动的机理,建立起基于矢量分区概念的中点电流数学模型,为中点电压控制提供了理论依据,并阐明了关于中点电压波动的几点重要结论。所提出的分析方法直观有效,物理意义清晰,便于对系统中点电压波动的理解和分析。仿真和实验研究结果证实了本文研究方法的正确性。更多还原

【Abstract】 This paper investigates the variation mechanism of neutral point (NP) potential in detail, establishes the average NP current model, thus the theory basis is built for the balancing control of neutral point potential, and several important conclusions about variation of NP potential are given. Theoretical analysis and experimental results indicate that the proposed method for NP balancing control is effective. The effectiveness of proposed research approach in this paper is verified by simulative and experimental results.更多还原