Resonant AC to AC converter

This paper proposes a novel, power electronics system, a series resonant AC to AC converter, capable of converting a single phase AC supply of frequency f/sub i/, into a balanced three-phase supply of frequency f/sub oc/ that may he both higher as well as lower to the input frequency. Use of microcontrollers to control the trigger pulses has made it more versatile. It finds its application in single phase traction system where DC traction motors may be replaced by three phase induction motors operated from 50 Hz. A methodology is obtained to generate the three phase output from single phase input for micro-computer implementation. Peripheral input-output and microcomputer interfacing hardware has been developed using programmable devices. The trigger circuit has been tested qualitatively by observing various waveforms on CRO. The operation of proposed system has been found satisfactory.