In this section the high voltage bi-directional DC-DC converter, shown in Fig. 1 is discussed. High
voltage unidirectional flyback converter for a normal resistive load is analyzed in [12] without
considering all parasitic elements in the flyback converter. The converter operation during the charge
and the discharge modes including all parasitic elements is analyzed in detail in this paper. Loss
modeling of the proposed converter has been performed in [13] using the proposed accurate analysis.
The approximated model of the flyback transformer from [14] either referred to primary or secondary
is used in this paper for the analysis in each stage of charging and discharging processes