A slip-current control system of asynchronous motor based on FOC model

The traditional V/F control system of asynchronous motor realizes a low cost and simple design, but the dynamic performance cannot be assured. This thesis deduces the relation between motor torque and stator current, based on the FOC (field oriented control) model of asynchronous motor. Using this equation, we designed a simple control system, which well considers the characteristic of constant flux field and the convenience of DSP operation. The system also avoids the influence of rotor resistance. The block diagram and concrete realization of the system is introduced. Being used to drive QR pure electric vehicle, the system indicates its reliability and the foreground of further popularization.