Dynamic flux controlled AC drive

A dynamic flux controlled drive for a cage induction motor uses a technique called `phase-decoupling´ to improve significantly the transient response of a scalar-controlled drive while retaining all the inherent advantages of the method. The strategy requires a versatile PWM modulator, but it is applicable to a wide variety of applications, achieving a transient performance surpassing most other transducerless flux-controlled systems, in particular those using slip reconstruction methods. The controller is simple and practical to implement and requires no external transducers. The authors discuss the theoretical basis for the method and compare detailed computer simulations with equivalent experimental investigations