Soft-switching non-isolated high step-up three-level boost converter using single magnetic element

Jazi, Hamed Moradmand; Fekri, Mahmoud; Keshani, Milad; Khorasani, Ramin Rahimzadeh; Adib, Ehsan; Wheeler, Patrick; Garcia, Herminio‐Martinez; Velasco‐Quesada, Guillermo

Abstract

Here, a soft switched three-level boost converter with high voltage gain is proposed which is suitable for high step-up applications with wide output power range. In this converter, a ZVT auxiliary circuit is used which provides soft switching in a wide range of output power independent of load variation. Utilizing coupled-inductors with one magnetic core removes extra auxiliary core in the soft switching circuit and provides high voltage gain in conjunction with size reduction. Also, the secondary and tertiary leakage inductances of the coupled-inductors minimize the reverse recovery problem of the output diodes. Due to its three-level structure, it has very low voltage stress over semiconductor elements in comparison to the existing interleaved structures, resulting in using MOSFETs with low on-resistance and thus lower conduction losses and cost. Operating modes as well as analytical analysis of the proposed converter are discussed. Finally, in order to validate the proposed converter performance, experimental results from a 200-W laboratory prototype are presented.

Citation

Jazi, H. M., Fekri, M., Keshani, M., Khorasani, R. R., Adib, E., Wheeler, P., …Velasco‐Quesada, G. (2021). Soft-switching non-isolated high step-up three-level boost converter using single magnetic element. IET Power Electronics, 14(14), 2324-2336. https://doi.org/10.1049/pel2.12183

• Journal Article Type: Article
• Acceptance Date: Aug 21, 2021
• Online Publication Date: Sep 15, 2021
• Publication Date: Nov 1, 2021
• Deposit Date: Dec 22, 2021
• Publicly Available Date: Dec 22, 2021
• Journal: IET Power Electronics
• Electronic ISSN: 1755-4543
• Publisher: Institution of Engineering and Technology (IET)
• Peer Reviewed: Peer Reviewed
• Volume: 14
• Issue: 14
• Pages: 2324-2336
• DOI: https://doi.org/10.1049/pel2.12183
• Keywords: Electrical and Electronic Engineering
• Public URL: https://nottingham-repository.worktribe.com/output/7056477
• Publisher URL: https://ietresearch.onlinelibrary.wiley.com/doi/full/10.1049/pel2.12183