三相异步电动机星—三角降压启动控制电路分析  

Analysis of Three-Phase Asynchronous Motor Star-Delta Step-Down Start Control Circuit

作　　者：李冬英[1] Li Dong-ying

机构地区：[1]恩施职业技术学院,湖北恩施445000

出　　处：《电力系统装备》2022年第3期44-46,共3页Electric Power System Equipment

摘　　要：文章以教材中经常出现的两种三相异步电动机星—三角降压启动控制电路为例,总结了第一种电路的元件清单,对其工作原理进行了分析,并对电路中的重点内容进行了解析,同时就安装接线过程中经常会出现问题的地方:主电路中3个不同交流接触器主触点的接线;电机的接线;等电位点连接中“就近原则”进行了详细的分析和总结,最后就教材中经常出现的第二种电路进行了分析并提出了改进措施。The article takes two three-phase asynchronous motor star-delta step-down start-up control circuits that often appear in textbooks as examples,summarizes the component list of the first circuit,analyzes its working principle,and analyzes the components in the circuit.The key content is analyzed,and at the same time,there are often problems in the installation and wiring process:the wiring of the main contacts of three different AC contactors in the main circuit;the wiring of the motor;the"principle of proximity"in the equipotential point connection.Finally,the second circuit that often appears in the textbook is analyzed and the improvement measures are put forward.

关 键 词：星—三角降压启动 控制电路 分析 

分 类 号：TM343.2[电气工程—电机]