Title: Analysis of voltage stress on a coupled inductor-based high gain boost DC-DC converter with light load condition

Authors: Tanmoy Roy Choudhury; Byamakesh Nayak; Subhendu Bikash Santra

Addresses: School of Electrical Engineering, KIIT (Deemed to be University), Bhubaneswar, Odisha, 751024, India ' School of Electrical Engineering, KIIT (Deemed to be University), Bhubaneswar, Odisha, 751024, India ' School of Electrical Engineering, KIIT (Deemed to be University), Bhubaneswar, Odisha, 751024, India

Abstract: In this paper, voltage stress of a coupled inductor-based high gain boost DC-DC converter is established under light load condition. During this condition, reverse recovery occurs on the switches of the converter enabling resonance condition on the parasitic elements of the devices. Due to this, a large voltage stress appears on the switching devices. However, appropriate snubber design can save the devices from the attack of this voltage stress. To attain a proper snubber design, a complete realisation of the parasitic elements has to be suitably evaluated through a complex and tedious analysis. However, an indirect method using maximum voltage stress analysis can also be a suitable alternative for proper snubber design. A detailed study in this regard with respect to steady state analysis, voltage stress formulations with a variation of load condition etc. are the key aspects of this work. Validation of this study is carried out with a laboratory prototype of 50 W capacity.

Keywords: coupled inductor; gain crossing point; light load condition; single switch; voltage stress on devices.

DOI: 10.1504/IJPELEC.2021.114468

International Journal of Power Electronics, 2021 Vol.13 No.3, pp.281 - 299

Received: 19 May 2018
Accepted: 13 Dec 2018

Published online: 23 Apr 2021 *

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