浅析低压电动机的控制问题  

Discussion on Control Problem of Low Voltage Motor

作　　者：刘国军[1] 

机构地区：[1]中国石化集团上海工程有限公司,上海200120

出　　处：《低压电器》2009年第21期55-58,共4页Low Voltage Apparatus

摘　　要：针对大型石化项目中,低压电动机种类广、数量多,控制方式不一,控制要求亦复杂多样,以一台普通电动机的典型控制原理图为例,阐述了电气工程设计中低压电动机常规的控制方式及控制要求。结合工程实际,对由于控制回路距离过长而引起的端电压降过大和控制电缆间分布电容过大,最终导致启停按钮不能正常开机与停机的问题进行详细分析,寻求到合理的解决方法。Aiming at complexity of low voltage motor in big petrochemical engineering,such as many type and quantity,different control mode and various control demand,taking type control principle of normal motor as an example,the normal control mode and demand for electric engineering design were expounded.The problem,which start/stop button can＇t be used normally because of excess long control loop leading to excess end voltage-fall and excess distributed capacitance between cables,was analyzed in detail,to find reasonable solution.

关 键 词：电动机控制中心 分布式控制系统 接触器 线圈 

分 类 号：TM301.2[电气工程—电机]