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AC-DC矩阵变换器空间矢量优化调制模式研究

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Keywords: AC-DC矩阵变换器,空间矢量调制,电感电流纹波,窄脉冲,调制模式

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Abstract:

为减小输出电感电流纹波和窄脉冲,对AC-DC矩阵变换器空间矢量调制模式的优化进行深入研究。根据AC-DC矩阵变换器原理及工作模式得到输出电感电流纹波表达式及特性,分析7种调制模式零矢量与电流纹波最大幅值的关系,提出减小电流纹波的零矢量优化方法;考虑换流过程,分析不同调制模式窄脉冲条件和几率;为减小电感电流纹波和窄脉冲,提出一种分段优化调制模式,以实现输出电压全范围调节,改善输入输出波形质量。仿真和实验验证了本文的结论,表明了提出的优化调制策略的正确性。

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