Fully Soft-Switched Single-Switch High Gain DC–DC Topology Based on Coupled Inductor

Abstract

High-gain DC/DC converters play critical roles in most renewable-energy applications such as wind and solar power. A significant number of the high-gain converters are utilized to boost voltage gain by employing an excessive duty cycle and low turn ratio. However, the operation in high duty cycle raises losses and costs, lowers system effectiveness, and results in a low efficiency. This paper proposes a novel solution for a high-gain DC/DC boost converter. The proposed converter can be utilized in low input voltage scenarios that require a large voltage gain, such as solar photovoltaic panels and fuel cells. The novel topology is characterized by a simple operation, high voltage gain, improved efficiency by utilizing two resonance circuits, and continuous input current. An experimental high-gain boost converter with a power output of 300 watts and a voltage ranging from 20 volts to 160 volts is utilized to demonstrate the efficiency of the proposed converter topology.

Keywords

• High gain converter
• DC to DC converter
• two windings coupled-inductor
• zero current switching