Multi- Stage power conversion with bi-directional power flow capability without using any storage elements

This paper proposes the simulation of MultiStage power conversion with bi-directional power flow capability fed to Induction Motor. The conversion topology not only performs voltage transformation and electric isolation as the traditional power transformer does, but also provides additional features like facility to control the input current and power factor. Also, it makes the whole system smaller and compact and there is no need of installing any other protective relays for protection during faults. It simply works as a power quality conditioner. Conversion of single phase ac to constant frequency adjustable magnitude ac with a high frequency transformer fed Induction Motor is introduced . In a switching strategy based on phase modulated converter is used in order to get soft switching when the output voltage and current are in the same quadrant. Single and three phase ac/ac converters with power conversion is based on fly back or push-pull topologies with multiple power conversion stages are proposed .Here we simulate conversion circuit using MATLAB/SIMULINK and we
obtain various waveforms of input currents and output voltages which are quality sinusoidal waveforms and the
input power factor is controllable.