三相异步电动机断相保护  

Study of Phase-break Protection of Three Phase Asynchronous Motor

作　　者：任政谏[1] 卢利斌[1] 

机构地区：[1]西安第二炮兵工程学院,710025

出　　处：《电机技术》2008年第5期44-45,共2页Electrical Machinery Technology

摘　　要：通过对三相异步电动机断相前后的电流相位的变化情况进行分析,设计了一种基于相位分析的保护装置。该装置根据单稳态的特点并结合延迟电路,对电流的相位变化进行监控,在排除电源质量干扰的情况下,确保电动机工作在安全状态。The variation of current to phase position in the 3-phase asynchronous motor was analyzed exactly before and after the phase break occurred. A protector was designed in accordance with the analysis of phase position. It supervised the phase change of current based upon the mono-stable feature and combined with that of delayed electric circuit. It was able to ensure the safe operation of the motor even under the condition that there was the interference in the power net.

关 键 词：三相异步电动机 断相保护 相位 

分 类 号：TM343.2[电气工程—电机] TM320.73