Zero-Voltage-Switching PWM Resonant Full-Bridge Converter With Minimized Circulating Losses and Minimal Voltage Stresses of Bridge Rectifiers for Electric Vehicle Battery Chargers

A Hybrid PWM-Resonant DC-DC Converter for Electric Vehicle Battery Charger Applications

“…The lagging-leg switches in the conventional PSFB converter fail easily in terms of ZVS operation as the output load decreases [6]- [8]. However, the lagging-leg switches in the proposed converter can achieve ZVS operation without the effect of the output load condition due to the integrated LLC SRC as documented in [12]- [14]. Moreover, the circulating current flowing only in the primary side of the conventional PSFB converter is removed because the primary current is reset to zero level with the voltage ripple of the resonant capacitor C R1 during the freewheeling phase, as shown in the key operating waveforms of the proposed converter described in Fig.…”

“…However, for wide-output-voltage-range applications like battery chargers, the conventional PSFB converter cannot obtain an optimal power conversion efficiency due to its unique drawbacks such as a narrow ZVS range, large circulating current, and high voltage stress in the rectifier diodes [9]- [11]. In order to improve the performance of the conventional PSFB converter for EV battery charger applications, hybrid dc-dc converters with an LLC series resonant converter (SRC) integrated into the PSFB converter have recently been researched [12]- [14]. By integrating an LLC SRC into a PSFB converter, the resulting hybrid dc-dc converters have many advantages such as a wide ZVS range, reduced size of the filter inductor, and reduced voltage stress.…”

“…While the proposed converter has all of the benefit of the hybrid converters in [12]- [14], it has fewer components and better utilization of the transformers when compared with previous hybrid converters. The circuit configuration, operating principle, and analysis of the proposed converter are presented in this paper.…”

SEPIC Converter Based Switched Mode Power Supply Design for Battery

“…Single Ended Primary Inductance Converter (SEPIC) at the DC-end of a single-phase diode bridge rectifier operating at the discontinuous conduction mode (DCM) is a good alternative to the conventional buck or boost converter, where a low input current harmonic content is obtained with proper inductor selection of the converter [5][6][7][8][9][10][11][12][13][14].…”

Optimization of a self-driven current-doubler phase shifted full bridge DC-DC converter with integrated magnetic

“…PSFB converter is used widely for data center or telecom applications due to its high conversion efficiency, high power density, simple control structure and low electromagnetic interface (EMI) (Zhao et al, 2009;Badstuebner et al, 2011;Badstuebner et al, 2010;Kim et al, 2014;Gu et al, 2013;Zhao et al, 2008;& Xu et al, 2005. In the low output voltage and high output current applications, center tapped rectifier or current doubled rectifier structures given in Fig.…”