感应电动机堵转时内角接单相投入冲击电流的解析计算和分析  

Analysis of Inrush Current of Inside Delta Connection Induction Machine with Single-Phase Switched on at the Time of Locked Rotor

作　　者：吴玲[1] 

机构地区：[1]西安高压电器研究院有限责任公司,西安710077

出　　处：《电气技术》2015年第10期17-20,26,共5页Electrical Engineering

摘　　要：为研究电动机起动冲击电流与哪些参数有关以及冲击电流首半波与初始触发角的关系,首先列出三相感应电动机在αβ0坐标下的运动方程,然后着重研究了感应电动机内角接单相投入时的方程,通过拉普拉斯变换求得堵转时定子电流的解析解,最后利用Matlab软件编制了M语言程序对此进行了数值仿真,并对解析解进行了对比。针对三相感应电动机软起动的初始触发角的研究,在正确的解析解的基础上提取了最佳首半波的初始触发角,这对减小首半波的冲击电流起了十分重要的作用。The relation between starting inrush current and parameter, and the first-halfwave of inrush current related to initial trigger angle are researched. Firstly, the rotative equation of the three phase induction motor at αβ0 coordination is presented. Then the rotative equation of inside delta connection three phase induction with single-phase switched on is analyzed in order to get analytic solution of stator current by Laplace transformation at the time of locked rotor. Finally, numerical simulation of M language compiled by Matlab is compared with analytic solution, which confirms the validity of the analytic solution. Form these data, the initial trigger angles of the best first-halfwave are extracted based on analysis of initial trigger angle of soft starting of three-phase induction. so it is very important to reduce inrush current of the first-halfwave.

关 键 词：内角接 解析计算 感应电动机 堵转 

分 类 号：TM346[电气工程—电机]