基于自励振荡无速度传感器异步电动机的控制

Study of Control Method for Induction Motor of Speed Sensorless Based on Self-excited Oscillating

介绍一种无速度传感器异步电动机拖动系统的再启动方法,来推测无速度传感器异步电动机的转速。该方法是基于异步电动机在某角频率下发生自励振荡的阻抗特性来实现。无需高速运算,能利用低成本的处理器来完成。其方法的有效性已通过对5 5kW的异步电动机实验和仿真加以证实。

?A restart method for an asynchronous motor drive system without speed sensor is pro0posed. It is based on the characteristic of the asynchronous motor impedance which is resonant for a frequency corresponding to the angular rotor speed. Since high speed ACR is not required, it can be implemented by using a low cost processor. The validity of the method is verified by simulation and experiments, using a standard 55 kW asynchronous motor.