使二次侧绕组提取到不含基波无功的谐波电能，并经过变频装置变为可直接利用基频电能。
Therefore, the secondary winding of transformer extracts harmonic energy without fundamental reactive power, which becomes applicable fundamental frequency power via frequency converter.
使二次侧绕组提取到不含基波无功的谐波电能，并经过变频装置变为可直接利用基频电能。
Therefore, the secondary winding of transformer extracts harmonic energy without fundamental reactive power, which becomes applicable fundamental frequency power via frequency converter.
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