Document Type : Original Article
Department of Electrical Engineering, Isfahan(Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
Najafabad Branch, Islamic Azad University.
Najafabad Branch, Islamic Azad University
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.