低压三相电机交流控制电源应采用控制变压器

Control Transformers Adopted for Power Supply of AC Low‑voltage Three‑phase Motor Control Circuit

就交流低压三相电动机控制电路的电源而言,国内外采用的方式有很大不同,我国多为相线加中性线或两根相线,而国外发达国家几乎均采用控制变压器;从标准入手进行对比分析,提出除特殊原因外,交流低压三相电动机控制电路的电源应采用控制变压器。

As far as the power supply of AC low⁃voltage three⁃phase motor control circuit is concerned,the methods adopted at home and abroad are quite different.Most of the power supply in China is phase line+neutral line or two phase lines,while almost all foreign developed countries adopt control transformers.By comparing and analyzing the standards,it is proposed that the control transformer should be used as the power supply of the AC low⁃voltage three⁃phase motor control circuit except for special reasons.