CAJ | 학술논문

三相感应电动机离散变频软起动在限制大的起动电流的同时，能够保证足够大的起动转矩，非常适用于重载起动的设备。优先选取存在正序对称的相位角组合的分频频率，而有些分频电压不存在正序对称的相位组合。该文以2分频为例，采用对称分量法结合仿真分析来确定这些分频基波电压相位角组合。在理论基础上，利用SIMULINK建立不同相位角组合下起动的仿真。结果表明，选取合适的相位角的组合能使电机以高转矩和较小的起动电流起动。
삼상감응전동궤리산변빈연기동재한제대적기동전류적동시，능구보증족구대적기동전구，비상괄용우중재기동적설비。우선선취존재정서대칭적상위각조합적분빈빈솔，이유사분빈전압불존재정서대칭적상위조합。해문이2분빈위례，채용대칭분량법결합방진분석래학정저사분빈기파전압상위각조합。재이론기출상，이용SIMULINK건립불동상위각조합하기동적방진。결과표명，선취합괄적상위각적조합능사전궤이고전구화교소적기동전류기동。
Discrete variable frequency soft starting for three-phase asynchronous motors can restrain bit starting current,and ensure too enough starting torque.It can be wel applied for devices with high load. Firstly,choose the discrete variable frequency with the symmetrical positive-sequence combination of phase angle.But there is no positive-sequence combination of phase angle in some discrete variable frequency.In this paper take the 2 discrete frequency for exemple,determine the optical combination of phase angle with the discrete variable frequency by three phase symmetry component method.Based on the theory,simulation of different combinations of phase angle is established by the SIMULINK.The experiment approves the optical combination of phase angle can star motor with high strating torque and smal starting current.