Modified buck converter with constant voltage stress using a CDD circuit

Since voltage stress of semiconductors is equal to the input voltage in the conventional buck converter, the voltage stress of semiconductors is high in high input voltage application. In addition, ripple voltage across the output filter varies with the input voltage, so volume and weight of the out...

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Bibliographic Details
Published in:Electrical engineering 2024-06, Vol.106 (3), p.2347-2356
Main Authors: Yao, Zhilei, Yang, Mengwei, Liu, Tao
Format: Article
Language:English
Subjects:
Buck converters
Economics and Management
Electrical Engineering
Electrical Machines and Networks
Energy Policy
Engineering
Low voltage
Original Paper
Power Electronics
Ripples
Semiconductors
Citations: Items that this one cites
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Summary:Since voltage stress of semiconductors is equal to the input voltage in the conventional buck converter, the voltage stress of semiconductors is high in high input voltage application. In addition, ripple voltage across the output filter varies with the input voltage, so volume and weight of the output filter increases. Therefore, the buck converter integrated with a CDD circuit is proposed to address the aforementioned problems. Voltage stress of semiconductors is constant and is equal to the output voltage. Thus, voltage stress of semiconductors is reduced in the high input voltage application and efficiency of the system can be improved because of low voltage stress of semiconductors. In addition, ripple voltage across the output filter is also constant and is equal to the output voltage, so volume and weight of the output filter can be reduced when input voltage varies. Operating principle of the proposed converter is elaborated. Design guideline and examples are given. Loss of the converter is analyzed. Comparison among different buck-type converters is presented. Lastly, experimental results confirm the theoretical analysis.
ISSN:0948-7921
1432-0487
DOI:10.1007/s00202-023-02081-1