Speed control method for switched reluctance motor drive using self-tuning of switching angle

In this paper, a determination method of turn-off angle is realized by using a self-tuning control method. During the sampling time, a number of pulses from the encoder are checked by using a single-chip microprocessor and then compared with a pre-checked number of pulses. After calculating the difference between the two data, the turn-off angle moves forward or backward by the self-tuning method. By repeating such a process, the optimal turn-off angle is determined and the maximum torque is maintained. Though experiments, it is observed that motor speed is almost maintained if the turn-off angle is adjusted automatically by a self-tuning method when turn-on angle is changed