低压三相电机交流控制电源应采用控制变压器

谢 炜（苏州一科科建建筑设计研究院有限公司，江苏省苏州市 215006）

孙文华（中国汽车工业工程有限公司，天津市 300113）

陈 谦(山东意匠建筑设计有限公司，济南市 250022)

栗 惠（西门子（中国）有限公司上海分公司，上海市 200082）

Control Transformers Adopted for Power Supply of AC Low‑voltage

Three‑phase Motor Control Circuit

XIE Wei(Suzhou Yike Kejian Architectural Design & Research Institute

Co.,Ltd.,Suzhou 215006,Jiangsu Province，China)

SUN Wenhua(China Automotive Industry Engineering Corporation,Tianjin 300113，China)

CHEN Qian(Shandong Yijiang Architecture Design Co.,Ltd.,Ji’nan 250022，China)

LI Hui(Siemens(China)Co.,Ltd. Shanghai Branch,Shanghai 200082，China)

Abstract： 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.

Key words：AC low‑voltage three‑phase motor;control circuit power supply;control circuit;phase line + neutral line;220 V;control transformer;auxiliary circuit;mechanical and electrical safety

摘　要：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。

关键词：交流低压三相电动机；控制电路电源；控制电路；相线加中性线；220 V；控制变压器；辅助电路；机械电气安全

中图分类号：TU852    　　　　   文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2021.05.004