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首页> 外文期刊>Power Electronics, IET >Geometrical visualisation of indirect space vector modulation for matrix converters operating with abnormal supplies
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Geometrical visualisation of indirect space vector modulation for matrix converters operating with abnormal supplies

机译:具有异常电源的矩阵转换器的间接空间矢量调制的几何可视化

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摘要

Matrix converters can be sensitive to abnormal supply conditions due to the absence of energy storage elements. This sensitivity can get worse when the matrix converters are modulated by a traditional indirect space vector modulation that assumes the input variables are sinusoidal and balanced. Therefore, this study proposes a methodology for the modulation of matrix converters without requiring any assumption of the input voltages. The method uses a geometric representation based on the singular value decomposition of the switch states to synthesise the rotating vectors of the target duty-cycle matrix. Furthermore, this study mathematically highlights the factors that regulate the amplitude of the output voltages and utilise them to compensate the adverse effect of the abnormal input voltages. Experimental results presented in this study validate that the proposed method can provide sinusoidal and balanced output currents in the presence of abnormal supply conditions.
机译:由于没有储能元件,矩阵转换器可能对异常供电条件敏感。当矩阵转换器通过传统的间接空间矢量调制(假设输入变量为正弦波且平衡)进行调制时,灵敏度会变得更差。因此,这项研究提出了一种无需任何输入电压假设即可调制矩阵转换器的方法。该方法使用基于开关状态的奇异值分解的几何表示来合成目标占空比矩阵的旋转矢量。此外,这项研究在数学上突出了调节输出电压幅度并利用它们来补偿异常输入电压的不利影响的因素。在这项研究中提出的实验结果验证了该方法在异常供电情况下可以提供正弦和平衡的输出电流。

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