Switched reluctance motor torque control with peak current minimization

• Published in: 30th Annual Conference of IEEE Industrial Electronics Society, 2004. IECON 2004 Vol. 2; pp. 1885 - 1890 Vol. 2
• Main Authors: Ben Amor, L., Dessaint, L.-A., Akhrif, O.
• Format: Conference Proceeding
• Language: English
• Published: Piscataway NJ IEEE 2004
• Subjects: Applied sciences; Brushless motors; Commutation; Computer science; control theory; systems; Connection and protection apparatus; Control system analysis; Control theory. Systems; Electrical engineering. Electrical power engineering; Electrical machines; Error correction; Exact sciences and technology; Magnetic flux; Miscellaneous; Power harmonic filters; Pulse width modulation; Regulation and control; Reluctance machines; Reluctance motors; Rotors; Torque control; Target tracking; Tracking; Low speed; Control system; Control program; Active region; Control synthesis; Motor torque; Minimization; On-line systems; Torque motors; Implementation; Reluctance motors; Optimization; Current limiter; Synchronous motor; Current control; Computation time; Switching conditions; Torque control; System simulation; Electric motor
• ISBN: 9780780387300; 0780387309
• DOI: 10.1109/IECON.2004.1431871

In this paper a new instantaneous torque controller is designed for a low speed operation of a switched reluctance motor (SRM). The commutation angles are optimized in order to minimize the torque ripple which occurs at commutation regions. The ripple-free torque which can be developed by the motor is evaluated for both single and double phase excitation methods. In order to minimize the peak current observed at the end of each active region, a current limiting control law based on torque-current characteristics is proposed. Simulation results show that the proposed torque control strategy allows good torque tracking with low torque ripples and minimum peak currents. Moreover, it is simple to implement since it does not require time consuming online computations.