Voltage balancing in a 1-level modular multilevel matrix converter

doi:10.16511/j.cnki.qhdxxb.2017.21.031

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Abstract A modular multilevel matrix converter (MMMC) can convert three phase AC input to three phase AC output. The converters use four-quadrant operation with good modularity and low frequency performance for high-voltage high-power variable frequency drive systems. MMMC designs include the topology without branch inductors and the topology with branch inductor. The MMMC without branch inductors are smaller and lighter.This paper describes a 1-level MMMC with the voltage of the H-bridge branches calculated numerically. The switching times are optimized to balance the voltages in the H-bridge branches. Tests show the effectiveness of the voltage balancing strategy.

Keywords modular multilevel matrix converter (MMMC) optimal switching times voltage balance

ZTFLH:

TM461.5

Issue Date: 15 November 2017

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	LI Yao
	XU Lie
	LI Yongdong

Cite this article:

LI Yao,XU Lie,LI Yongdong. Voltage balancing in a 1-level modular multilevel matrix converter[J]. Journal of Tsinghua University(Science and Technology), 2017, 57(11): 1220-1227.

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http://jst.tsinghuajournals.com/EN/10.16511/j.cnki.qhdxxb.2017.21.031 OR http://jst.tsinghuajournals.com/EN/Y2017/V57/I11/1220

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