Therefore based on Fig. 8, and (36) the minimum value of inductor \(L_{1}\) (\(L_{1min}\)) is as follows:
\(L_{1min}=\frac{V_{\text{in}}(1-D)}{F_{s}\Delta_{{i}_{L1}}}\)                                                                                             (37)
In (37), \(V_{\text{in}}\)and \(F_{s}\) are the input voltage and switching frequency. Also the minimum value of inductor \(L_{3}\) is calculated based on (30).
4. Comparison
In this section, input current ripple of the proposed converter is compared to the converter in \cite{rosas2012transformer}. If the current ripple of both converters are considered in the duty cycle of\(\ 0.3\leq D\leq 0.9\) and\(\ D_{0}=0.7\), the Fig. 9, is resulted.