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电磁损耗抑制共模电流方法的研究

Keywords: 共模电流,电磁损耗,抑制,集总元件的梯形网络,传输矩阵

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Abstract:

沿电缆-底盘传导的共模电流是电动汽车产生电磁干扰的重要原因.根据传输线理论,提出了利用电磁损耗抑制共模电流的新途径.实践中,采用集总元件的梯形网络,在电容器和线圈内分别填充电损耗材料和磁损耗材料,来构建相应的电磁损耗器件.通过求解基于传输矩阵关系式的联立方程组,探讨电磁损耗对电缆上共模电流影响的特征,表明利用电磁损耗可有效地抑制较宽频率范围内的共模电流.本文提出的方法也可用于抑制光伏并网、舰船电力系统、印刷电路板等方面存在的共模电流.

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