Speed Control of Single and Three Phase Induction Motor Using Full Bridge Cycloconverter

This project proposes a full bridge cyclo-converter for three and single-phase induction motor speed control. The speed control of Induction Motor is simple and can be made efficient by using various methods to control the action of Cyclo-converter which will control the motor performance. There are two ways to control the speed of the motor, one method is by changing the frequency and the second method is by changing the number of poles. The speed control by the second method is uneconomical because under running conditions the number of poles can't be varied and the machine size becomes bulkier, but the problems can be overcome by the first method. In this scheme, the motor supply frequency can be varied in running conditions, so it will not change the motor size. In this scheme, the Cyclo-converter is a frequency changing device. It is a power electronic device used to convert constant frequency constant voltage AC power to adjustable frequency adjustable voltage. AC power is used without a DC link. Among all the schemes the frequency method is reliable, simple and economical. By using Cyclo converter the various speed of induction motor is obtained. The merits of proposed bridge type cyclo converter for speed control of single and three phase induction motor is verified by simulations in MATLAB/Simulink environment.