Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/195918
Title: High-Efficiency High-Power-Density LLC Converter With an Integrated Planar Matrix Transformer for High-Output Current Applications
Authors: Chao Fei;Fred C. Lee;Qiang Li
Year: 2017
Publisher: IEEE
Abstract: Isolated high-output current DC/DC converters are critical for future data center power architecture. LLC converters with matrix transformer are suitable for these applications due to its high efficiency and high power density. Different matrix transformer structures are investigated in this paper. To improve the current design practice, a high-frequency transformer loss model is developed and a detailed design methodology is proposed. Moreover, a novel matrix transformer structure is proposed to integrate four elemental transformers into one magnetic core with simple four-layer print circuit board windings implementation and further reduced core loss. By pushing switching frequency up to megahertz with GaN devices, the proposed matrix transformer can achieve high efficiency, high power density, and automatic manufacturing for magnetic components. A 1-MHz 380 V/12 V 800-W LLC converter with GaN devices is demonstrated. The prototype achieves a peak efficiency of 97.6% and a power density of 900 W/in<sup>3</sup>.
URI: http://localhost/handle/Hannan/195918
volume: 64
issue: 11
More Information: 9072,
9082
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7862753.pdf2.56 MBAdobe PDF
Title: High-Efficiency High-Power-Density LLC Converter With an Integrated Planar Matrix Transformer for High-Output Current Applications
Authors: Chao Fei;Fred C. Lee;Qiang Li
Year: 2017
Publisher: IEEE
Abstract: Isolated high-output current DC/DC converters are critical for future data center power architecture. LLC converters with matrix transformer are suitable for these applications due to its high efficiency and high power density. Different matrix transformer structures are investigated in this paper. To improve the current design practice, a high-frequency transformer loss model is developed and a detailed design methodology is proposed. Moreover, a novel matrix transformer structure is proposed to integrate four elemental transformers into one magnetic core with simple four-layer print circuit board windings implementation and further reduced core loss. By pushing switching frequency up to megahertz with GaN devices, the proposed matrix transformer can achieve high efficiency, high power density, and automatic manufacturing for magnetic components. A 1-MHz 380 V/12 V 800-W LLC converter with GaN devices is demonstrated. The prototype achieves a peak efficiency of 97.6% and a power density of 900 W/in<sup>3</sup>.
URI: http://localhost/handle/Hannan/195918
volume: 64
issue: 11
More Information: 9072,
9082
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7862753.pdf2.56 MBAdobe PDF
Title: High-Efficiency High-Power-Density LLC Converter With an Integrated Planar Matrix Transformer for High-Output Current Applications
Authors: Chao Fei;Fred C. Lee;Qiang Li
Year: 2017
Publisher: IEEE
Abstract: Isolated high-output current DC/DC converters are critical for future data center power architecture. LLC converters with matrix transformer are suitable for these applications due to its high efficiency and high power density. Different matrix transformer structures are investigated in this paper. To improve the current design practice, a high-frequency transformer loss model is developed and a detailed design methodology is proposed. Moreover, a novel matrix transformer structure is proposed to integrate four elemental transformers into one magnetic core with simple four-layer print circuit board windings implementation and further reduced core loss. By pushing switching frequency up to megahertz with GaN devices, the proposed matrix transformer can achieve high efficiency, high power density, and automatic manufacturing for magnetic components. A 1-MHz 380 V/12 V 800-W LLC converter with GaN devices is demonstrated. The prototype achieves a peak efficiency of 97.6% and a power density of 900 W/in<sup>3</sup>.
URI: http://localhost/handle/Hannan/195918
volume: 64
issue: 11
More Information: 9072,
9082
Appears in Collections:2017

Files in This Item:
File SizeFormat 
7862753.pdf2.56 MBAdobe PDF