安装电抗器实际是从外部增加变频器供电电源的阻抗,在变频器的交流侧或直流侧安装电抗器或同时安装,可以抑制谐波电流。采用交流/直流电抗器后,进线电流的(电压畸变率)大约降低30%~50%,是不加电抗器谐波电流的1/2左右。
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