Design of a Soft-Switched 6-kW Battery Charger for Traction Applications

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

“…In addition, a half-bridge (HB) LLC SRC with a center-tap rectifier (CTR) is integrated into the conventional converter by sharing the lagging-leg switches Q 3 and Q 4 and stacking two rectifiers in series before the output filter stage consisting of L O and C O1 . 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].…”

“…A conventional phase-shift full-bridge (PSFB) converter with a full-bridge rectifier is the preferred DC-DC topology for EV on-board battery charger applications, because of its natural zero-voltage-switching (ZVS) operation, low current ripple in the battery charging current, and simple structure and control [6]- [8]. 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].…”

Soft‐Switching DC‐DC Converters

“…A ZVS buck-boost converter with ZVS for all converter switches has been proposed in [9], but the converter still needs two auxiliary switches. improve the efficiency of the full-bridge converter [13]- [20]. For higher power applications, where IGBTs are the preferred devices as they have lower conduction losses than MOSFETs due to their fixed collector-emitter voltage drop, zero-current-switching (ZCS) techniques are preferred.…”

Micro-Controller Based LCC ResonantConverterAnalysis, Design, and Simulation Results

“…When the LCC is operated in DCM, it offers many advantages [4], such as negligible switching losses due to zero current switching (ZCS), choice of higher switching frequency, smaller resonant components, etc., in addition to simple control circuitry and ease of control. Due to the advantages of the DCM operation of resonant converters, many control IC's have appeared in the market, for example, Cherry Semiconductor CS-360 [4], [5], [6], [7] Genum LD405, and Unitrode UC1860.…”