Implementation of 3.3-kW GaN-based DC-DC converter for EV on-board charger with series-resonant converter that employs combination of variable-frequency and delay-time control

Jang, Yungtaek; Jovanovic, M.M.; Ruiz, Juan M.; Kumar, Misha; Liu, Gang

doi:10.1109/apec.2016.7468035

Cited by 14 publications

(3 citation statements)

References 13 publications

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“…In literature, 20,21 the secondary-side switching networks are reconfigured to achieve a wide output voltage range. In literature, 20 a variable structure rectifier consisting of a switched capacitor, two active switches, two diodes, and two output capacitors is proposed to expand the output voltage range by pulse width modulation (PWM) control.…”

Section: Introductionmentioning

confidence: 99%

“…Although these structures can extend the output voltage range, the introduction of additional components will bring more conduction losses and costs. In literature, 21 two rectifying diodes are replaced with GaN MOSFETs on the secondary side to realize a wide output voltage range in a narrow switching frequency by specific modulation. However, the control scheme proposed in this paper needs to detect the drain‐source voltage of the secondary‐side switches to probe the zero‐crossing time of resonant current, which increases the complexity of system.…”

Section: Introductionmentioning

confidence: 99%

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LLC resonant converter based on PFM and secondary‐side short‐circuit control for on‐board charger

Tang

Shi

Jiang

et al. 2022

Circuit Theory & Apps

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Commonly used lithium‐ion battery on‐board charger (OBC) for electric vehicles (EVs) needs a wide output voltage range, but the traditional LLC converter is hard to meet the need under the condition of high efficiency and high power density. In this paper, a resonant converter with hybrid modulation is proposed. The converter has a relatively simple topology and control method. Compared with the traditional LLC topology, only two diodes are replaced by MOSFETs on the secondary side of the transformer, and no auxiliary components are added. The primary‐side switches adopt PFM) and the secondary‐side switches adopt short‐circuit control in the proposed converter, which can realize a wide output voltage range, in a narrow switching frequency range with excellent soft‐switching performance. The proposed converter can effectively reduce the resonant current and the volume of transformer core and achieve energy delivery with high power density and high efficiency. The operation principles, voltage gain, and soft‐switching conditions of the converter are analyzed in this paper. Finally, a 3.3‐kW SiC‐based prototype with 400‐V input and 250‐ to 430‐V output is built to verify the feasibility and validity of the proposed converter.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

LLC resonant converter based on PFM and secondary‐side short‐circuit control for on‐board charger

Tang

Shi

Jiang

et al. 2022

Circuit Theory & Apps

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“…Load adaptive variable frequency control methods have been proposed in [7], [27]- [35] for resonant FB converters to achieve higher efficiency at light-load conditions.…”

Section: Gating Techniques and Adaptive Control Methodsmentioning

confidence: 99%

Soft-switched DC-DC converters for PHEV charger

Kanamarlapudi¹

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An efficient power conditioning system plays a significant role in the design of battery charging systems for plug-in hybrid electric vehicles (PHEVs). A typical PHEV battery charging system consists of two stages. The first stage is an ac-dc conversion stage which regulates the input power factor, input current total harmonic distortion and intermediate dc bus voltage. The second stage is a dc-dc conversion stage which regulates the output voltage and provides galvanic isolation between utility grid and PHEV battery pack. The research works presented in this thesis focus on the dc-dc conversion stage of a PHEV charger.The phase-shift modulated (PSM) isolated full-bridge (FB) dc-dc converter topology is commonly preferred for the dc-dc stage. High efficiency, high power density, high reliability, and galvanic isolation are the main features of this topology. However, zero-voltage switching (ZVS) is not ensured for all switches at light-load conditions resulting in poor efficiency of the converter. Furthermore, high voltage spikes are present across output rectifier diodes due to voltage ringing on the secondary side. These voltage spikes are further intensified with the increase in series inductance or leakage inductance of the transformer, output filter inductance and switching frequency. In addition, the voltage spikes increase the electromagnetic interference (EMI) of the converter. Therefore, the motivation for the research work presented in this thesis is to address these drawbacks in order to obtain an improved performance for the dc-dc converter over the entire operating range.Auxiliary circuits can be added to the FB converter for improving the ZVS range.Additionally, snubber circuits can minimize the voltage spikes. In this research work, two new gating techniques, namely asymmetrical pulse-width modulation (APWM) and trailing-edge pulse-width modulation (TEPWM) gating techniques and a passive auxiliary circuit assisted topology are proposed to improve the performance of the dc-dc conversion stage in a PHEV charger.

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Power Semiconductor Devices for Smart Grid and Renewable Energy Systems

Bose¹

2019

Power Electronics in Renewable Energy Systems and Smart Grid

176

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Implementation of 3.3-kW GaN-based DC-DC converter for EV on-board charger with series-resonant converter that employs combination of variable-frequency and delay-time control

Cited by 14 publications

References 13 publications

LLC resonant converter based on PFM and secondary‐side short‐circuit control for on‐board charger

LLC resonant converter based on PFM and secondary‐side short‐circuit control for on‐board charger

Soft-switched DC-DC converters for PHEV charger

Power Semiconductor Devices for Smart Grid and Renewable Energy Systems

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