Adaptive Fuzzy Logic Speed Control of SRM in Hysteresis Current Control Mode

Abstract

The “switched reluctance motor” SRM can be operated in many modes based on the desired application that employs such kinds of motor. The SRM speed in each mode can be controlled. Thus, it’s better to select the fast response speed control method with the lowest torque ripples and speed variations. The aim of the current research is to enhance the SRM speed control by that works in “hysteresis current control” HCC mode. The SRM speed is regulated by a “fuzzy logic controller” FLC. The role of the speed control signal by FLC is compared with the SRM position sensor to produce a reference current signal. This signal is fed to a hysteresis band to control the speed of the motor. This method of speed is referred to as HFLC. In this paper, another approach is made by replacing the hysteresis band with a hyperbolic tan function for more smooth in system control. This method is called TanHFLC. The results showed that the speed control in TanHFLC is faster by 6.2 %, and current and torque ripples are less by 10.9% and 20.8%, respectively. This work is simulated by the “MATLAB Simulink” software successfully at several operating conditions.