A High Frequency High Efficiency GaN Based Bi-Directional 48V/12V Converter with PCB Coupled Inductor for Mild Hybrid Vehicle

Bin Li; Wei Qin; Yuchen Yang; Qiang Li; Fred C. Lee; Dong Liu

doi:10.1109/WiPDA.2018.8569067

A High Frequency High Efficiency GaN Based Bi-Directional 48V/12V Converter with PCB Coupled Inductor for Mild Hybrid Vehicle

Bin Li, Wei Qin, Yuchen Yang, Qiang Li, Fred C. Lee, Dong Liu

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

18 Citations (Scopus)

Abstract

The commercialization of the mild hybrid is impeded by the demands of a lightweight, compact yet efficient bidirectional DC/DC converter between 48V system and the conventional 12V system. With conventional Si-based design, the converter operating frequency is typically less than 70 kHz, resulting in a bulky system with 1-2kW/L power density and no more than 95% efficiency. In this paper, a bi-directional 3.5kW 48V/12V converter is designed using low voltage GaN devices from EPC. Due to the superior performance of GaN devices, the switching frequency of the converter can be pushed to over 200kHz and the whole converter volume and weight are significantly reduced. In the meantime, thanks to the high frequency operation, PCB winding coupled inductors with −0.6 coupling coefficient are adopted to further shrink the system size and simplify the manufacture process. As a result, the converter reaches over 8.7kW/L power density with 97.5% peak efficiency, which are far beyond the current Si practice.

Original language	English
Title of host publication	Proceedings of the 2018 IEEE 6th Workshop on Wide Bandgap Power Devices and Applications (WiPDA)
Number of pages	8
Publisher	IEEE
Publication date	Oct 2018
Pages	204-211
ISBN (Print)	978-1-5386-5910-6
ISBN (Electronic)	978-1-5386-5909-0
DOIs	https://doi.org/10.1109/WiPDA.2018.8569067
Publication status	Published - Oct 2018
Event	2018 IEEE 6th Workshop on Wide Bandgap Power Devices and Applications (WiPDA) - Atlanta, United States Duration: 31 Oct 2018 → 2 Nov 2018

Conference

Conference	2018 IEEE 6th Workshop on Wide Bandgap Power Devices and Applications (WiPDA)
Country/Territory	United States
City	Atlanta
Period	31/10/2018 → 02/11/2018

Keywords

GaN device
bi-directional converter
PCB winding coupled inductor
mild hybrid vehicle

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10.1109/WiPDA.2018.8569067

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@inproceedings{58d0a29f051f4e359903d645c19577d6,

title = "A High Frequency High Efficiency GaN Based Bi-Directional 48V/12V Converter with PCB Coupled Inductor for Mild Hybrid Vehicle",

abstract = "The commercialization of the mild hybrid is impeded by the demands of a lightweight, compact yet efficient bidirectional DC/DC converter between 48V system and the conventional 12V system. With conventional Si-based design, the converter operating frequency is typically less than 70 kHz, resulting in a bulky system with 1-2kW/L power density and no more than 95% efficiency. In this paper, a bi-directional 3.5kW 48V/12V converter is designed using low voltage GaN devices from EPC. Due to the superior performance of GaN devices, the switching frequency of the converter can be pushed to over 200kHz and the whole converter volume and weight are significantly reduced. In the meantime, thanks to the high frequency operation, PCB winding coupled inductors with −0.6 coupling coefficient are adopted to further shrink the system size and simplify the manufacture process. As a result, the converter reaches over 8.7kW/L power density with 97.5% peak efficiency, which are far beyond the current Si practice.",

keywords = "GaN device, bi-directional converter, PCB winding coupled inductor, mild hybrid vehicle",

author = "Bin Li and Wei Qin and Yuchen Yang and Qiang Li and Lee, {Fred C.} and Dong Liu",

year = "2018",

month = oct,

doi = "10.1109/WiPDA.2018.8569067",

language = "English",

isbn = "978-1-5386-5910-6",

pages = "204--211",

booktitle = "Proceedings of the 2018 IEEE 6th Workshop on Wide Bandgap Power Devices and Applications (WiPDA)",

publisher = "IEEE",

address = "United States",

note = "2018 IEEE 6th Workshop on Wide Bandgap Power Devices and Applications (WiPDA), WiPDA ; Conference date: 31-10-2018 Through 02-11-2018",

}

Li, B, Qin, W, Yang, Y, Li, Q, Lee, FC & Liu, D 2018, A High Frequency High Efficiency GaN Based Bi-Directional 48V/12V Converter with PCB Coupled Inductor for Mild Hybrid Vehicle. in Proceedings of the 2018 IEEE 6th Workshop on Wide Bandgap Power Devices and Applications (WiPDA). IEEE, pp. 204-211, 2018 IEEE 6th Workshop on Wide Bandgap Power Devices and Applications (WiPDA), Atlanta, United States, 31/10/2018. https://doi.org/10.1109/WiPDA.2018.8569067

A High Frequency High Efficiency GaN Based Bi-Directional 48V/12V Converter with PCB Coupled Inductor for Mild Hybrid Vehicle. / Li, Bin; Qin, Wei; Yang, Yuchen et al.
Proceedings of the 2018 IEEE 6th Workshop on Wide Bandgap Power Devices and Applications (WiPDA). IEEE, 2018. p. 204-211.

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

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AU - Qin, Wei

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AU - Li, Qiang

AU - Lee, Fred C.

AU - Liu, Dong

PY - 2018/10

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N2 - The commercialization of the mild hybrid is impeded by the demands of a lightweight, compact yet efficient bidirectional DC/DC converter between 48V system and the conventional 12V system. With conventional Si-based design, the converter operating frequency is typically less than 70 kHz, resulting in a bulky system with 1-2kW/L power density and no more than 95% efficiency. In this paper, a bi-directional 3.5kW 48V/12V converter is designed using low voltage GaN devices from EPC. Due to the superior performance of GaN devices, the switching frequency of the converter can be pushed to over 200kHz and the whole converter volume and weight are significantly reduced. In the meantime, thanks to the high frequency operation, PCB winding coupled inductors with −0.6 coupling coefficient are adopted to further shrink the system size and simplify the manufacture process. As a result, the converter reaches over 8.7kW/L power density with 97.5% peak efficiency, which are far beyond the current Si practice.

AB - The commercialization of the mild hybrid is impeded by the demands of a lightweight, compact yet efficient bidirectional DC/DC converter between 48V system and the conventional 12V system. With conventional Si-based design, the converter operating frequency is typically less than 70 kHz, resulting in a bulky system with 1-2kW/L power density and no more than 95% efficiency. In this paper, a bi-directional 3.5kW 48V/12V converter is designed using low voltage GaN devices from EPC. Due to the superior performance of GaN devices, the switching frequency of the converter can be pushed to over 200kHz and the whole converter volume and weight are significantly reduced. In the meantime, thanks to the high frequency operation, PCB winding coupled inductors with −0.6 coupling coefficient are adopted to further shrink the system size and simplify the manufacture process. As a result, the converter reaches over 8.7kW/L power density with 97.5% peak efficiency, which are far beyond the current Si practice.

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KW - mild hybrid vehicle

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ER -

A High Frequency High Efficiency GaN Based Bi-Directional 48V/12V Converter with PCB Coupled Inductor for Mild Hybrid Vehicle

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