A New SEPIC-Based Step-Up DC-DC Converter With Wide Conversion Ratio for Fuel Cell Vehicles: Analysis and Design

In this article, a new single-ended primary-inductor converter (SEPIC)-based step-up dc-dc converter which integrates discontinuous-current quasi-Z-source (qZS) and switched-capacitor networks is proposed. The proposed converter has a low input current ripple, wide voltage gain range, low voltage st...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2021-08, Vol.68 (8), p.6390-6400
Main Authors: Elsayad, Nour, Moradisizkoohi, Hadi, Mohammed, Osama
Format: Article
Language:English
Subjects:
Capacitors
Conversion ratio
DC-DC power converters
DC–DC converter
electric vehicle
Electric vehicles
fuel cell
Fuel cells
Gallium nitrides
Low voltage
Semiconductor devices
Silicon carbide
single-ended primary-inductor converter (SEPIC)
Stress
Switches
Topology
Voltage converters (DC to DC)
Voltage gain
wide voltage gain
wide-bandgap
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Summary:In this article, a new single-ended primary-inductor converter (SEPIC)-based step-up dc-dc converter which integrates discontinuous-current quasi-Z-source (qZS) and switched-capacitor networks is proposed. The proposed converter has a low input current ripple, wide voltage gain range, low voltage stress on the semiconductor devices, and a constant potential difference between the grounds of its input and output ports. These features make the proposed converter an excellent interface between the fuel cell and the dc-link bus inside the electric vehicle. The analysis of the proposed converter for steady-state operations in continuous conduction mode and discontinuous conduction mode are given. Finally, a 3-kW/800-V scaled-down prototype was built using a gallium nitride power switch and silicon carbide diodes to validate the feasibility of the proposed converter and its theoretical analysis.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2020.3007110