PERFORMANCE INVESTIGATIONS ON 8031 BASED SWITCHED RELUCTANCE MOTOR DRIVE

Abstract

The design, fabrication and performance investigations of a microcontroller based three-please switched reluctance motor drive have been discussed in this dissertation. The converter used, has the advantage of a minimum possible number of semiconductor devices in the power circuit without the attendant need for a bifilar winding. Consequently, its drive requirements are minimal, and the windings are simple. Control circuit used for the triggering of MOSFETS, has been discussed. The control strategy is based on 8031 microcontroller. Energy stored in the phase winding during conduction period is partially dissipated in a Lesistor, whereas the rest is converted into mechanical power. The position feedback, i.e. identification of the particular phase winding of the reluctance motor is done through the optical sensors (three), to switch-on or switch-off the various converter devices. Through ADC (0809), the speed command is given and the drive has been operated at the desired switching frequency, so that the speed of the drive follows the speed command. The waveforms recorded at various speeds are presented and discussed. The performance of the switched reluctance motor was found satisfactory