After the inverting level step-up transformer is used
that step-up voltage is passed to the load side converter. at the
load side converter four switches is there like S5, S6, S7 and
S8.first stage S5 and S8 is turned on getting some output
voltage after that switches s6 ands7 turned on. Generally output
voltage is depending on the triggering pulses. That output DC
voltage is passed to the PI filter, with the help of PI Filter some
ripples is filtered in the output voltage side. That filtered DC
voltage is give to motor load. The input voltage is DC voltage (112V).