On the Design of Novel Single-Switch Low Loss Boost Converters With High Step-Up Voltages

This article presents a nonisolated single-switch low loss boost converter with a high step-up voltage. Typically, the duty cycle of boost converters is increased to achieve high voltage levels at their output. Prolonged duty cycles cause an increase in the duration of current flow through the switch and can lead to an increase in losses of the switch and other components of the converter. This article introduces a boost converter that provides high-voltage gains with limited duty cycles. Instead of one inductor used in a typical converter, the proposed converter uses three inductors. Two capacitors (in addition to the parallel capacitor at the output) are used to store more energy enabling the converter to enhance the output level. When the switch is activated, the current passing through the switch and other components of the converter is increased due to these capacitors. To overcome this problem, the proposed converter is equipped with an additional inductor in series with the source. This inductor leads to smoother current flow through the source. Another capacitor, charged by the input source, contributes to accomplishing soft switching. To show the operational capabilities of the proposed converter, results of manufacturing a prototype of the converter are presented.