A new ZCT high step-up single switch converter for fuel cell application

Articles in Press

Document Type : Research Paper

Authors

1 Department of engineering, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran

2 Department of Engineering, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran

10.22104/hfe.2025.7255.1331

Abstract

In this paper, a new step-up converter with input current ripple and low voltage stress is presented. The converter has a low number of elements, so its volume and price are reduced. A lossless snubber is utilized to achieve zero current switching during turn-on and zero voltage switching during turn-off. All diodes are switched at zero current, so they don't have reverse recovery problem. Furthermore, the snubber capacitor's stored energy is efficiently delivered to the output rather than being dissipated in the converter. Another advantage is that the energy from leakage inductance is captured by the lift capacitor, eliminating spikes on the switch. The suggested converter features minimal input current ripple and exceptional efficiency. make it an excellent choice for integration into fuel cell systems. The converter has been completely analyzed and a 100W prototype has been simulated and built to confirm the circuit analysis. The experimental results indicate an efficiency of 95% under nominal load conditions.

Keywords

Main Subjects

Hydrogen, Fuel Cell & Energy Storage

Articles in Press, Accepted Manuscript
Available Online from 06 March 2025

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