Comparison of Per-unit Models of Phase-shifted Full-bridge Converter

Roja, P and John, V (2023) Comparison of Per-unit Models of Phase-shifted Full-bridge Converter. In: UNSPECIFIED.

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Abstract

Advanced dc-dc converters such as phase-shifted full-bridge (PSFB) converters are employed in a wide range of applications owing to the features of fixed frequency operation and soft-switching for the devices. The converter design entails selecting many design parameters, resulting in multiple design choices for the same set of specifications. This necessitates a normalised comparison of the designs to analyse the performance indices. This paper studies and compares the per-unit models of the PSFB converter obtained using three established methods. Firstly, a large signal-based state space model of the converter considering the circuit non-idealities is presented. This is employed for developing the per-unit model of the PSFB converter using three models viz, state-plane normalization model, normalised large signal model and similarity transformation model. A study on the feasibility of the developed per-unit models and subsequent comparison is presented next. Next, the normalised designs of Si-based and SiC-based PSFB converters for a 1 kW, 400 V to 48 V system are compared. Finally, using the change of bases, a SiC-based converter for the aforementioned ratings is built and tested to verify the specifications. © 2023 IEEE.

Item Type:	Conference Paper
Publication:	2023 11th National Power Electronics Conference, NPEC 2023
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	DC-DC converters; Power electronics; Specifications; State space methods, Converter design; Dc/dc converters; Fixed frequency; Frequency operation; Large signal models; Per-unit model; Per-unitization; Phase-shifted full-bridge converter; Soft-switching; State-plane analyse, Silicon carbide
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	01 Mar 2024 11:07
Last Modified:	01 Mar 2024 11:07
URI:	https://eprints.iisc.ac.in/id/eprint/84224

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