analysis and implementation of second-order step-up converter using winding cross coupled inductors for photovoltaic applications

One way to increase the voltage gain and reduce the voltage stress on the switch is by utilizing coupled inductors. however, a major drawback of this technique is the occurrence of voltage spikes on the switch, which are caused by the discharge of energy from the leakage inductance.this paper proposes a zero current switching step-up converter to mitigate the voltage stress on the switch resulting from the high voltage gain of the converter. this enables the utilization of switches with lower drain-source resistance, leading to a more affordable price. the converter’s auxiliary circuit requires minimal elements and does not require an additional switch, resulting in a straightforward control circuit. another advantage of the converter is the transfer of energy from the auxiliary circuit to the output. various operation modes of the proposed step-up converter have been investigated, and the converter’s behavior has been simulated using pspice software. to validate the accuracy of the analysis and simulation results, an 80w prototype has been implemented.