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.

[1]  Jong-Woo Choi,et al.  New current control concept: minimum time current control in induction machine drive , 1995, Proceedings of IECON '95 - 21st Annual Conference on IEEE Industrial Electronics.

[2]  Seung-Ki Sul,et al.  New current control concept-minimum time current control in 3-phase PWM converter , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.

[3]  A. Kawamura,et al.  Digital current regulation of field oriented controlled induction motor based on predictive flux observer , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[4]  Gene F. Franklin,et al.  Feedback Control of Dynamic Systems , 1986 .

[5]  Donald W. Novotny,et al.  Current Control of VSI-PWM Inverters , 1985, IEEE Transactions on Industry Applications.

[6]  Robert D. Lorenz,et al.  Performance of Feedforward Current Regulators for Field-Oriented Induction Machine Controllers , 1987, IEEE Transactions on Industry Applications.

[7]  Russel J. Kerkman,et al.  A New Synchronous Current Regulator and an Analysis of Current-Regulated PWM Inverters , 1986, IEEE Transactions on Industry Applications.

[8]  A. F. Wick,et al.  Design and Experimental Results of a Brushless AC Servo Drive , 1984, IEEE Transactions on Industry Applications.

[9]  Seung-Ki Sul,et al.  High performance current regulator for a field-oriented controlled induction motor drive , 1992, Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting.