APPLICATION OF MULTIMODE MATRIX CONVERTER FOR WASHING MACHINE

In this paper, multimode matrix converter is used to universal motor speed control system developed for proposed washing machine. Output voltage is synthesized by SPWM technique. In washing machines, the use of Induction motors wastes energy. To achieve speeds like tumbling operations at low speed and say drying at a spin cycle at a high speed, one needs to use a universal motor. Switching the voltage for achieving different speeds is again wasteful, so some companies have introduced ‘variable frequency’ drives. This saves power but increases the cost of the drive. A design using multimode multiple’ matrix converter’ is proposed. In this the output voltage is synthesized by switching IGBTs in a matrix. Switching is done by control signals generated using SPWM techniques. A computer simulation model was developed using MATLAB. Simulated results have been observed and analyzed