An adaptive current control scheme for PWM synchronous motor drives: analysis and simulation

Two schemes for controlling the motor currents in PWM (pulse-width-modulated) inverters in synchronous motor drives are considered: hysteresis control and predictive control. It is pointed out that the system static and dynamic performance can be improved by selecting the control mode in an adaptive manner according to the operating conditions. In steady state, the predictive mode is selected to reduce current ripple and to obtain stable switching frequency. During large transients, such as during starting or load variations, the hysteresis mode is selected to provide fast response. The performance of the proposed controls scheme has been studied by simulation, and the results agree well with the prediction. This adaptive control scheme can be implemented using a high-performance 16-bit microcontroller supported by a mathematical coprocessor. >

[1]  T.M. Rowan,et al.  Voltage controlled current regulated PWM inverters , 1988, Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting.

[2]  E. Gaio,et al.  Improved current control technique for VSI PWM inverters with constant modulation frequency and extended voltage range , 1988, Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting.

[3]  T. Kato,et al.  Modified hysteresis control with minor loops for single-phase full-bridge inverters , 1988, Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting.

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

[5]  Hoang Le-Huy,et al.  Minimization of Torque Ripple in Brushless DC Motor Drives , 1986, IEEE Transactions on Industry Applications.

[6]  Michel Lajoie-Mazenc,et al.  Study and Implementation of Hysteresis Controlled Inverter on a Permanent Magnet Synchronous Machine , 1985, IEEE Transactions on Industry Applications.

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

[8]  Hirofumi Akagi,et al.  A Novel Control Scheme for Current-Controlled PWM Inverters , 1986, IEEE Transactions on Industry Applications.

[9]  P. Dalton,et al.  Current control of induction motors at low speeds , 1988, Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting.