Open AccessIsolated switched‐boost push–pull DC–DC converter for step‐up applications
Author(s) -
Gorji S.A.,
Ektesabi M.,
Zheng J.
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2016.4151
Subject(s) - forward converter , flyback converter , boost converter , ćuk converter , voltage multiplier , transformer , buck–boost converter , voltage , waveform , negative impedance converter , electronic engineering , computer science , electrical engineering , control theory (sociology) , engineering , voltage regulation , dropout voltage , control (management) , artificial intelligence
A high voltage ratio DC–DC converter is proposed which is comprised of four stages. First, an impedance network along with a switching network have been used to boost the input voltage. The boosted voltage waveform is then followed by an isolation transformer to provide another degree of freedom and obtain higher boost ability. Finally, a voltage multiplier rectifier is utilised to rectify the secondary voltage of the transformer. No switching dead‐time is required, which increases the reliability of the converter. The proposed converter benefits from the continuous input current. Besides, a comparison with the existing step‐up topologies indicates that the number of passive elements and hence the weight and size have been reduced. The operating principles were analysed and the experimental tests on a 260 W prototype reveal that a high efficiency above 91% can be achieved.