A MODIFIED TORQUE CONTROL METHOD FOR SWITCHED RELUCTANCE MOTOR DRIVES

Abstract

The inherent simplicity and low cost of switched reluctance motors (SRM) make them well
suited to many applications. However, high torque ripple is intrinsic in this motor unless a torque ripple
control strategy is employed. This paper presents a modified torque control method for SRMs to reduce their
torque ripple. The method is based on a combination of instantaneous direct torque control method and
torque-shared functions method; maintaining constant torque during the transition from one phase to
another, by turning off transistors of the outgoing phase and determining the required current of the
incoming phase, thus eliminating the number of switching of the transistors.
Simulation results show that the proposed method successfully eliminates the motor torque ripple, especially
when the motor runs at the average to the nominal speed, the proposed method is more effective (from the
energy point of view) than the method of torque shared functions with a cosinusoidal relationship.
The advantages of the modified control method are the simplicity of the control algorithm compared to the
direct torque control method, since the adjustment of the ripple level requires one firing angle definition (the
value of which varies with the motor speed), and less number of regions in which the structure of the relay
regulators changes, which is much simpler than in the direct control as well.
The drawbacks of the proposed modified method include small current pulsations in low-speed zones, and
increased demands on microprocessor resources caused by the need to process two three-dimensional
tables.

Author Biographies

Виктор Владимирович Бушер, Odessa National Polytechnic University

Doctor of Science, Professor of Department of Electromechanical
Systems with Computer Control, Odessa National Polytechnic University

Василий Владимирович Горошко, Odessa National Polytechnic University

post graduate student of Department of Electromechanical Systems
with Computer Control, Odessa National Polytechnic University

Камаль Абдальмажид Хандакжи, Tafila Technical University

Associate Professor, Department of Electrical Power and
Mechtronics, Tafila Technical University

Published
2017-05-10
How to Cite
Бушер, В., Горошко, В., & Хандакжи, К. А. (2017). A MODIFIED TORQUE CONTROL METHOD FOR SWITCHED RELUCTANCE MOTOR DRIVES. Electrotechnic and Computer Systems, (25(101), 44-52. https://doi.org/10.15276/eltecs.25.101.2017.05
Section
Automated electromechanical systems

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