A novel 3-phase AC current control technique with fast response and high accuracy

In this paper, a new current controller for AC motor drives that has both fast response in transient and high accuracy in steady state is proposed. In this scheme, the synchronous PI regulator with feedforward back-EMF compensation, which is widely applied in industry, is utilized as a basic structure for easy implementation and high accuracy in steady state. Moreover, modification parts for reference currents and feedforward compensations are incorporated for the fast transient response. Through the simulation and experimental results, it is observed that the proposed controller has much less transient time than the conventional synchronous PI regulator and predictive current controller, and it has high accuracy in steady state as a synchronous PI regulator