A new topology combining boost and secondary-side magnetic reset forward excitation

To address the limitations of conventional magnetic reset methods and input power inefficiencies in high-output-voltage, low-output-current applications, this work proposes a novel topology integrating a Boost converter with a secondary-side magnetically reset forward topology. An excitation energy storage path is introduced on the secondary side to achieve magnetic reset. The proposed topology effectively reduces input power requirements and switch voltage stress. Its secondary magnetic reset path enhances output voltage regulation and voltage boosting speed. Through rigorous analysis of energy transfer mechanisms and topological relationships, circuit simulations were conducted and a prototype was developed for experimental validation. Test results demonstrate a 64% reduction in input power and 37.2% shorter voltage rise time compared to the resistor, capacitor and diode (RCD) reset forward boost topologies, along with 65% lower input power than active-clamp forward converters. Experimental and prototype validation confirm the feasibility of the proposed topology and the accuracy of theoretical analyses.