Analysis and design considerations of an improved ZVS full-bridge DC-DC converter

Chen, Zhong; Ji, Biao; Jiang, Feng; Shi, Lei

doi:10.1109/apec.2010.5433424

Cited by 20 publications

(9 citation statements)

References 17 publications

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“…It is enough to analyze the first 6 operation modes since the following (7)(8)(9)(10)(11)(12) Fig. 1.…”

Section: A Phase-shift Full-bridge Operation Analysesmentioning

confidence: 99%

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Digital Control of Secondary Active Clamp Phase-Shifted Full-Bridge Converters

Che¹,

Yage²,

Ge³

et al. 2014

Journal of Power Electronics

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A DSP-based self-adaptive proportional-integral (PI) controller to control a DC-DC converter is proposed in this paper. The full-bridge topology is adopted here to obtain higher power output capability and higher conversion efficiency. The converter adopts the zero-voltage-switching (ZVS) technique to reduce the conduction losses. A parallel secondary active clamp circuit is added to deal with the voltage overshoot and ringing effect on the transformer's secondary side. A self-adaptive PI controller is proposed to replace the traditional PI controller. Moreover, the designed converter adopts the constant-current and constant-voltage (CC-CV) output control strategy. The secondary active clamp mechanism is discussed in detail. The effectiveness of the proposed converter was experimentally verified by an IGBT-based 10kW prototype.

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“…It is enough to analyze the first 6 operation modes since the following (7)(8)(9)(10)(11)(12) Fig. 1.…”

Section: A Phase-shift Full-bridge Operation Analysesmentioning

confidence: 99%

“…Papers [9] and [10] add auxiliary passive networks into the traditional converter and all of the primary switches can achieve ZVS in the entire load range. Furthermore, the parasitic oscillations of the rectifier voltage are lower because the leakage inductance can be designed to be rather small.…”

Section: Introductionmentioning

confidence: 99%

Digital Control of Secondary Active Clamp Phase-Shifted Full-Bridge Converters

Che¹,

Yage²,

Ge³

et al. 2014

Journal of Power Electronics

View full text Add to dashboard Cite

show abstract

“…In addition, most fast chargers for LEV in public usage are designed and fabricated for lead-acid batteries. In the case of a fast charging system, high-frequency switching is required to reduce the system size with the ZVS and ZCS (Zero Current Switching) techniques which have switching loss reduction [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

LLC Resonant Converter for LEV (Light Electric Vehicle) Fast Chargers

Kim

Nengroo

et al. 2019

Electronics

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This paper presents a Light Electric Vehicle (LEV) fast charger with a Lithium-Ion Battery (LIB) and Super-Capacitor (SC). The LEV fast charger consists of an AC/DC rectifier and LLC (Inductor-Inductor-Capacitor) resonant Full bridge converter. The LLC resonant converter has high-efficiency and low switching loss because of Zero Voltage Switching (ZVS). So, it is used widely in the industry. In general, the fast charger algorithm uses the Constant Current (CC) mode and Constant Voltage (CV). The CC mode starts at first and then the CV mode finishes. However, there is a big control value gap between the CC mode and CV mode. Therefore, when changing from CC to CV, the transient state occurs. To compensate for the transient state, we propose a new control algorithm. By means of this algorithm, we can achieve a higher level of safety and stability. The fast charger with LIB of 800 Wh and SC of 50 Wh is analyzed and verified, and we obtain a maximum efficiency of 96.4%. The discussions are validated using the LLC resonant full bridge converter prototype at the laboratory level.

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“…The on-board chargers of electric vehicles (EVs) typically consist of an alternating current/direct current (AC-DC) converter and a DC-DC converter. The AC-DC converter transforms commercial AC into DC with a power factor correction function, and the DC-DC converter charges batteries via a certain charge method, such as constant-current/constant-voltage charging [1][2][3]. Efficiency and compactness are the most important factors in optimization during charger design because fuel efficiency is one of the most crucial factors that characterizes EV performance.…”

Section: Introductionmentioning

confidence: 99%

A Quasi-Resonant ZVZCS Phase-Shifted Full-Bridge Converter with an Active Clamp in the Secondary Side

Tran

Choi

2018

Energies

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A novel Pulse-Width-Modulation (PWM) quasi-resonant active-clamp phase-shifted full-bridge converter is presented and analyzed in this paper. In the proposed topology, an active-clamp switch and a clamp capacitor that resonates with the leakage inductance of transformer are employed at the secondary side. The active-clamp circuit helps all of the primary switches in achieving both zero-voltage switching (ZVS) turn-on and nearly zero-current switching (ZCS) turn-off over the entire load range, and resets the primary current during the freewheeling interval. The operation of the active-clamp circuit eliminates voltage ringing across the rectifier. In addition, the secondary diodes can achieve ZCS turn-off, which removes the reverse recovery problem of diodes, and the active-clamp switch can achieve ZCS turn-on. A 3.5-kW prototype was built to verify the performance of the proposed converter. A maximum efficiency of 97.6% was achieved under a 2-kW load, and an efficiency of more than 96% was achieved even under a light load.

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Analysis and design considerations of an improved ZVS full-bridge DC-DC converter

Cited by 20 publications

References 17 publications

Digital Control of Secondary Active Clamp Phase-Shifted Full-Bridge Converters

Digital Control of Secondary Active Clamp Phase-Shifted Full-Bridge Converters

LLC Resonant Converter for LEV (Light Electric Vehicle) Fast Chargers

A Quasi-Resonant ZVZCS Phase-Shifted Full-Bridge Converter with an Active Clamp in the Secondary Side

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