绕线式异步电动机转子串电阻分级起动过程的仿真

The Imitation of the Staring Process Stepped by Series Resistance in Rotator of Wound-rotor Asynchronous Motor

用计算机对绕线式异步电动机转子串电阻的分级起动过程进行仿真 ,使起动器的设计和选用更为快捷合理。该文用MATLAB软件中的电气系统模块库建立了绕线式异步电动机转子串电阻分级起动的瞬态仿真模型。其中 ,起动器的各级起动电阻的数值是根据异步电动机的T型等效电路对应的电流方程、转矩方程 ,用数值方法通过优化计算确定的 ;断路器的闭合时间是根据系统的运动方程用数值积分计算确定的。最后通过一个实例对电机的启动过程进行仿真并给出结果。

The computer imitation of starting process stepped by series resistance in the rotator of wound-rotor asynchronous motor is done in this paper. The imitation is helpful to design and select the starter of motor reasonably. The model of the imitation is set up by means of the power system block set in MATLAB software. The resistance of all or different levels in starter is determined by optimizing method according to current equation, rotation moment equation of the motor's T equivalent circuit. The closed time of circuit-breaker are also determined by numerical integral according to the movement equation of the system. The imitation of example is carried out and the results of the imitation are given.