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.