Bilateral series resonant inverter for highn frequency link UPS

Abstract

A bilateral series resonant inverter for a

high frequency link uninterruptible power supply

is described. The proposed inverter consists of a

zero current switched series resonant convertor, a

high frequency transformer and a zero current

switched cycloconvertor, where bidirectional

power flow and high efficiency are obtained. In

the proposed inverter, the output voltage is regulated

by controlling the resonant tank energy. The

switching pattern of the cycloconvertor is fixed to

obtain the high frequency transformer. A new

control scheme to minimise the output ripple

voltage is suggested and verified through computer

simulation and experiment, and the effects of

the circuit parameters on the output voltage ripple

are discussed.