Dual range flyback topology for high efficiency at dual voltage mains
- Author(s): Noam Ezra 1 and Teng Long 1
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View affiliations
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Affiliations:
1:
Department of Engineering , University of Cambridge , Cambridge , UK
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Affiliations:
1:
Department of Engineering , University of Cambridge , Cambridge , UK
- Source:
Volume 13, Issue 8,
17
June
2020,
p.
1565 – 1574
DOI: 10.1049/iet-pel.2019.1371 , Print ISSN 1755-4535, Online ISSN 1755-4543
This study introduces a dual range flyback converter, which overcomes low efficiency of the conventional flyback converter for universal mains voltages, i.e. 220 and 110 V AC mains. The topology comprises of reconfigurable primary power loops enabled by additional state switches. This combination allows the converter to run in parallel or series modes, enhancing the performance at 220 V AC high line or 110 V AC low line mains. It reduces the voltage rating of devices, supports two working points that operate in boundary conduction mode under fixed frequency and improves the utilisation of the devices. A 100 kHz, 60 W, 110 V AC or 220 V AC to 13 V DC converter has been designed and tested. The experimental results of the proposed converter have been compared against a conventional flyback converter. The results show a small improvement of performance at low voltage (110 V AC) and considerable performance improvement at high voltage (230 V AC): 0.6 and 2.3% efficiency improvement at full load, respectively.
Inspec keywords: AC-DC power convertors; power convertors; switching convertors; DC-DC power convertors
Other keywords: dual range flyback converter; dual range flyback topology; frequency 100.0 kHz; voltage 230.0 V; voltage 13.0 V; voltage rating; AC low line mains; universal mains voltages; boundary conduction mode; conventional flyback converter; efficiency improvement; power 60.0 W; voltage 220.0 V; voltage 110.0 V; dual voltage mains; reconfigurable primary power loops; AC high line; state switches
Subjects: AC-DC power convertors (rectifiers); Power electronics, supply and supervisory circuits
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