矩阵变换器及其换流策略研究

Research on matrix converter and its commutation strategy
Abstact：Matrix converter is a new type of direct AC•-AC converter using bi-directional switch for power transmission．It has gradually attracted a lot of attention by virtue of its excellent input and output characteristics．With traditional AC-AC converter and the AC - DC - AC converter compared to that of matrix converter with output frequency arbitrary regulation, two-way flow of energy, no advantage of large capacity energy storage component, and can arbitrarily control input current and output voltage of the phase, the input power factor any can adjust many obvious advantages.One of the key technical issues that influence the practical matrix converter is the commutation problem among different phases．

In this paper, breaking with the traditional matrix converter topology, we research and design a kind of three-phase matrix converter based on a step-up circuit, aimed at solving the problem of low voltage transfer ratio of the traditional matrix converter. Adopt “Venturini” method as the modulation strategy for its better output performance under conditions of asymmetric three-phase input. At present there is no bidirectional switching device, so we adopt IGBTs combined into bidirectional switches, and research on the four-step commutation strategy, in order to solving the problem of commutation between multiple bidirectional switches and achieve safely switching. At the same time, the step switch four step commutation strategy for three-phase matrix power converter is simulated in PSIM, and the switch is safe.
Keywords: matrix converter；coordinates transformation；Bidirectional switch；four step commutation strategy；PSIM

1.    绪论    5
1.1    AC-AC变换技术的发展概述    5
1.2    传统交流变换技术存在的问题    5
1.3    矩阵式电力变换器(MC：Matrix Converter)    6
1.4    矩阵式电力变换器(MC：Matrix Converter)存在的问题    6
1.5    本课题研究意义及研究内容    7
1.5.1    本课题的研究意义    7
1.5.2    本文研究内容与主要工作    8
2.    矩阵式变换器调制策略的分析    8
2.1    矩阵式变换器的结构    8
2.2    矩阵变换器基本原理    9 矩阵变换器及其换流策略研究:http://www.lwfree.cn/zidonghua/20190308/30910.html
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