The switched reluctance motor (SRM) drives have been widely used in
aircraft applications due to the motor advantages like high speed operation,
simple construction, no windings on rotor. But high torque ripples and
acoustic noise are main disadvantages. The current hysteresis chopping
control is one of the important control methods for SRM drives. These
disadvantages can be limited using the hysteresis or chopping current control.
This control strategy makes the torque of SRM maintained within a set of
hysteresis bands by applying suitable source voltage. This paper introduces
two hysteresis control modes; hard chopping and soft chopping mode. The
SRM drive system is modeled in Simulink model using
MATLAB/SIMULINK software package.