A 1-kV Input SiC <i>LLC</i> Converter With Split Resonant Tanks and Matrix Transformers

Ren, Xiaoyong; Zhang, Xu; Zhang, Zhiliang; Li, Haoran; He, Mingxie; Tang, Jia-Chen; Chen, Qianhong

doi:10.1109/tpel.2019.2896099

Cited by 24 publications

(5 citation statements)

References 10 publications

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“…The authors in [27] have shown that increasing the switching frequency from 65 kHz to 1 MHz reduces the size of the required passive components by about 50%, which can significantly increase power density. For the LLC converters with switching frequencies greater than 400 kHz, PCB coils and planar integrated transformers are often used [6,[51][52][53][54]. They are suitable for mass production due to the good reproducibility of the magnetic properties and they achieve high power density due to PCB integration.…”

Section: Dc-dc Converter Stagementioning

confidence: 99%

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A High-Efficiency High-Power-Density SiC-Based Portable Charger for Electric Vehicles

et al. 2022

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This paper proposes a portable 11 kW off-board charger for electric vehicles. In the ac/dc stage, a three-phase power factor correction (PFC) in Vienna topology is chosen. The loss and volume of the PFC inductance are calculated over a wide range of parameters and optimized with regard to design, winding, and core material. A three-phase LLC resonant converter operating at 1 MHz is chosen for the galvanically isolated dc/dc stage. A parametrizable loss model of the high-frequency transformer and the resonance inductor is developed to minimize volume, weight, and losses. With the help of an automated algorithm using these loss models, the inductive components are optimized in terms of winding specification, magnetic material, and core geometry, verified by finite element analysis and measurements. For the ac/dc stage, 900 V SiC devices are adopted, and 1200 V SiC devices are used in the primary and secondary sides of the dc/dc stage. A variable dc-link voltage is utilized to adjust the charging profile and to operate the LLC resonant converter at the most efficient point near the series resonance frequency. A mechatronically integrated portable air-cooled off-board charger prototype with 11 kW, three-phase 400 VAC input, and 620–850 VDC output is realized and tested. The prototype demonstrates a power density of 2.3 kW/liter (37.7 W/in³), a peak efficiency of 96%, and 95.8% efficiency over the defined battery voltage range.

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Section: Dc-dc Converter Stagementioning

confidence: 99%

“…planar integrated transformers are often used [6,[51][52][53][54]. They are suitable for mass production due to the good reproducibility of the magnetic properties and they achieve high power density due to PCB integration.…”

Section: Dc-dc Converter Stagementioning

confidence: 99%

A High-Efficiency High-Power-Density SiC-Based Portable Charger for Electric Vehicles

et al. 2022

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“…SiC-based devices with better voltage withstanding characteristics, wide band gap, high drift saturation speed, high thermal conductivity, and high critical breakdown electric field can be used for better performances [51][52] . Thus, silicon-based devices can be replaced by SiC-based devices to reduce the number of devices and further improve the efficiency and stability of the converters [53] .…”

Section: The Future Evolution Of the Llc Resonant Convertermentioning

confidence: 99%

LLC resonant converter topologies and industrial applications — A review

Zeng

Zhang

et al. 2020

Chin. J. Electr. Eng.

117

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Owing to the advantages of high efficiency, high energy density, electrical isolation, low electromagnetic interference (EMI) and harmonic pollution, magnetic integration, wide output ranges, low voltage stress, and high operation frequency, the LLC resonant converters are widely used in various sectors of the electronics-based industries. The history and development of the LLC resonant converters are presented, their advantages are analyzed, three of the most popular LLC resonant converter topologies with detailed assessments of their strengths and drawbacks are elaborated. Furthermore, an important piece of research on the industrial applications of the LLC resonant converters is conducted, mainly including electric vehicle (EV) charging, photovoltaic systems, and light emitting diode (LED) lighting drivers and liquid crystal display (LCD) TV power supplies. Finally, the future evolution of the LLC resonant converter technology is discussed.

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“…Based on the consideration of efficiency optimization, the optimal number of matrix transformer needs to be selected according to the actual situation. Paper [92][93][94] proposed several new structures of matrix transformers to integrate several matrix transformers into one core and arranged the windings reasonably to further reduce core loss. At the same time, the conventional winding loss model is not applicable to the matrix transformer, an accurately winding dc resistance model and an analytic winding ac resistance model suit for matrix transformer are proposed in [95].…”

Section: B Matrix Transformermentioning

confidence: 99%

A Review of High Frequency Power Converters and Related Technologies

Wang

Lucía

Zhang

et al. 2020

IEEE Open J. Ind. Electron. Soc.

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Development of power electronic converters tend to achieve high efficiency and at the same time high power density in many industrial applications. In recent years, with emerging third-generation semiconductor materials i.e. Silicon Carbide (SiC) and Gallium Nitride (GaN), the switching frequency of several MHz has become a widely studied frequency band, therefore traditional technology can no longer meet the demand, and many new challenges appear. This paper presents a comprehensive review of high frequency (HF) converters, the essential challenges are analyzed such as topology selection, soft-switching technologies, resonant gate drivers, magnetic components design and optimization. INDEX TERMS High frequency, converter, soft-switching resonant gate driver, magnetic components.

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A 1-kV Input SiC LLC Converter With Split Resonant Tanks and Matrix Transformers

Cited by 24 publications

References 10 publications

A High-Efficiency High-Power-Density SiC-Based Portable Charger for Electric Vehicles

A High-Efficiency High-Power-Density SiC-Based Portable Charger for Electric Vehicles

LLC resonant converter topologies and industrial applications — A review

A Review of High Frequency Power Converters and Related Technologies

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