Design and Implementation of a Novel DC-DC Converter with Step-Up Ratio and Soft-Switching Technology

This paper focuses on the development of a high-conversion-efficiency DC/DC boost converter, which features high step-up conversion and employs soft switching technology to reduce con-version losses. In the proposed design, the conventional energy storage inductor used in tradi-tional boost converters is replaced with a coupled inductor, and an additional boost circuit is in-troduced. This configuration allows the converter to achieve a higher voltage conversion ratio under the same duty cycle, thereby enhancing the voltage gain of the converter. Additionally, a resonance branch is incorporated into the converter, and by applying a simple switching signal control, zero voltage switching (ZVS) of the main switch is realized. This reduces the switching loss inherent in hard switching high step-up converters, thereby improving the overall conver-sion efficiency. To validate the performance of the proposed converter, the circuit principle of the proposed high step-up soft switching converter is first analyzed, followed by the design of the circuit components. Subsequently, the feasibility of the proposed converter is verified using PSIM simulation software. Finally, the proposed high step-up soft switching boost converter is tested using the TMS320F2809 digital signal processor, and it is verified that the main switch successfully achieves ZVS. The converter operates under a full load of 340W, achieving a conver-sion efficiency of 92.7%, demonstrating the excellent conversion performance of the developed converter.