基于旋转电动势控制的感应电动机转子磁场定向控制

基于机电能量转换原理和坐标变换理论,证明了转子磁场定向不仅实现了电磁转矩和磁链的解耦,而且实现了转子变压器电动势和旋转电动势的解耦,转矩和速度控制可以通过控制转子旋转电动势来实现.提出了基于旋转电动势控制的转子磁场定向控制系统,该系统在磁场恒定时可以实现恒转矩控制,在弱磁时可以实现恒功率控制.仿真结果表明该控制方法具有良好的动态性能,这为感应电动机的高性能速度控制提供了一条新的有效途径.

Rotor field-orientation control of induction motor based on control of rotating electromotive force

Based on the principle of electromechanical energy conversion and reference frame transformation theory,rotor field-orientation decouples not only flux linkage and torque but also rotor transformer electromotive force(TEMF) and rotating electromotive force(REMF).The control of torque and speed in variable-frequency induction motor drive can be achieved by control of rotor REMF.The direct rotor field-orientation control based on control of REMF is proposed and it can achieve not only constant torque control with constant rotor field but also constant power control with weakening rotor field.The results of simulation show that the proposed control method has good dynamic performance and is an effective new way for the high performance speed control of induction motors is provided.