矩阵变换器双电压合成定理及其自动调节能力研究

Research on Double Input Line-to-line Voltages Composition Theorem and Its Self-adjustability

矩阵变换器具有自身的一系列优点,是一种绿色变频器,是交-交变频研究的热点之一。控制策略是矩阵变换器研究的重要内容。双电压控制是最重要的控制策略之一,但双电压控制相对研究较少,已发表的研究成果具有一定的局限性。本文对已发表的成果作了进一步的研究,提出了相应定理和推论:得出了输出线电压、输入线电流的一般合成规律和统一表达式;分析了输入电压异常对输入线电流合成的影响;基于本文提出的定理,给出了该调制策略对输出线电压具有的自动调节能力的一般性证明。最后,应用MATLAB语言建立了基于该调制策略的仿真模型,仿真实验验证了所提出定理和推论的正确性。

Matrix converter has its own advantages. It is a green converter and one of hot spots of research for AC-AC converter. Control strategies are important contents of research for matrix converter. Control strategy on double input line-to-line voltages is one of most important control strategies. But control strategy on double input line-to-line voltages for matrix converter was studied fewer compared with others. Published payoffs had some limitations. So they were further studied in this paper. The relative theorem and inferences is put forward. That is the general composition rules and expressions of output line-to-line voltages and input line-to-line currents are gotten; effects of abnormal input voltages on input line-to-line current are analyzed; the general demonstration is given about the self-adjustability of this modulation strategy on output line-to-line voltages. Finally, the simulated model was setup in MATLAB language based on this modulation strategy. The simulated experiments have verified correctness of the theorem and inferences.