一种H桥型五电平有源中点钳位变频器共模电压抑制方法

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关键词：五电平有源中点钳位；H桥；共模电压抑制;输出电压解析式;能量函数DOI：10.15938/j. emc. 2025.09.004中图分类号：TM464 文献标志码：A 文章编号：1007-449X（2025）09-0038-13

Abstract：Addressing the challenge of accurately and quantitatively evaluating and suppressing the output common-mode voltage in H-bridge five-level active neutral-point-clamped（ANPC -5L） inverters under dead-time effects，a common-mode voltage suppression method based on energy function was proposed. Firstly，the common-mode voltage analytic expression of ANPC -5L three-phase H-bridge inverter was derived based on the double Fourier analysis method. Secondly，an evaluation function was proposed to characterize the common-mode voltage energy under different carrier phase-shift angles，and the corresponding energy function curve was obtained.The results indicate that selecting the optimal carrier phaseshift angle，which corresponds to the minimum point on the energy function curve，achieves optimal suppression of the common-mode voltage.Finally，the simulation and experimental verification of the common-mode voltage suppression strategy based on energy function were carried out. The results show that the proposed method can quantitatively evaluate the common-mode voltage with dead zone，and solve the optimal carier-phase shift angle of dead-zone ANPC -5L three-phase H-bridge inverter. The proposed method offers a solution for accurate evaluation and optimal suppression of common-mode voltage in ANPC -5L multiphase H-bridge topologies under dead-time conditions.

Keywords：five-level active neutral-point-clamped; H-bridge； common-mode voltage suppression； analytical expression of output voltage；energy function

0引言

随着电力电子器件和控制技术的日益进步，变频器所涉及和应用的领域越来越广泛，成为行业发展的重要方向。（剩余13927字）