异步电动机调速系统的一种实现方案

The Adjustable Speed System for Induction Motor

针对无速度传感器的调速系统 ,提出了一种将电压 /频率控制与矢量控制相结合的实现方案 .该方案先采用电压 /频率控制策略启动电动机 ,并利用扩展卡尔曼滤波估测转子转速 ,当转速接近给定转速时 ,转换到矢量控制 .系统仿真结果表明这种方案具有较好的动态和静态性能 .

Aiming at te speed regulation system without a speed sensor, a new method that the U/f control is confined with the vector control is introduced. The U/f control strategy is used to start the motor, meanwhile the rotor speed is estimated by using the extended kalman filter. When the estimated speed approximates to the given speed, the U/f control is replaced by the vector control. Simulation results show that this method is good on both dynamic and static performances.