Optimization and Co-Design of a 2-MHz GaN-based 700W LLC Converter

Nitish Jolly; Ashwin Chandwani; Osarogie Purr Irabor; Ayan Mallik

doi:10.1109/ECCE50734.2022.9947538

Optimization and Co-Design of a 2-MHz GaN-based 700W LLC Converter

Nitish Jolly, Ashwin Chandwani, Osarogie Purr Irabor, Ayan Mallik

Engineering, Ira A. Fulton Schools of (IAFSE)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Scopus citations

Abstract

With the objective of minimizing the power losses in a 2MHz LLC resonant converter, a novel multi-variable design optimization algorithm is developed and analyzed in this paper. Intricately curated constraints and corresponding trade-offs are explained for a complete co-design of a multi-MHz resonant converter. In addition to that, this study also provides detailed quantitative comparison of the effective AC winding resistance of the leakage integrated high frequency planar transformer (HFPT) for different winding configurations, along with comprehensive finite element analysis (FEA) simulations for current density distributions to elucidate the effect of skin and proximity effects. Further, the proposed optimization algorithm is experimentally verified by developing an all-GaN based LLC resonant converter rated at 700W, designed at 2MHz resonant frequency. While achieving a power density of 6.2 W/cm³, the efficiency at 10% load is experimentally reported to be 89%, while the peak efficiency is reported to be 95.6%.

Original language	English (US)
Title of host publication	2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781728193878
DOIs	https://doi.org/10.1109/ECCE50734.2022.9947538
State	Published - 2022
Event	2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022 - Detroit, United States Duration: Oct 9 2022 → Oct 13 2022

Publication series

Name	2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022

Conference

Conference	2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022
Country/Territory	United States
City	Detroit
Period	10/9/22 → 10/13/22

ASJC Scopus subject areas

Electrical and Electronic Engineering
Mechanical Engineering
Safety, Risk, Reliability and Quality
Energy Engineering and Power Technology
Renewable Energy, Sustainability and the Environment
Control and Optimization

Access to Document

10.1109/ECCE50734.2022.9947538

Cite this

Optimization and Co-Design of a 2-MHz GaN-based 700W LLC Converter. / Jolly, Nitish; Chandwani, Ashwin; Irabor, Osarogie Purr et al.
2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022. Institute of Electrical and Electronics Engineers Inc., 2022. (2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Jolly, N, Chandwani, A, Irabor, OP & Mallik, A 2022, Optimization and Co-Design of a 2-MHz GaN-based 700W LLC Converter. in 2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022. 2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022, Institute of Electrical and Electronics Engineers Inc., 2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022, Detroit, United States, 10/9/22. https://doi.org/10.1109/ECCE50734.2022.9947538

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abstract = "With the objective of minimizing the power losses in a 2MHz LLC resonant converter, a novel multi-variable design optimization algorithm is developed and analyzed in this paper. Intricately curated constraints and corresponding trade-offs are explained for a complete co-design of a multi-MHz resonant converter. In addition to that, this study also provides detailed quantitative comparison of the effective AC winding resistance of the leakage integrated high frequency planar transformer (HFPT) for different winding configurations, along with comprehensive finite element analysis (FEA) simulations for current density distributions to elucidate the effect of skin and proximity effects. Further, the proposed optimization algorithm is experimentally verified by developing an all-GaN based LLC resonant converter rated at 700W, designed at 2MHz resonant frequency. While achieving a power density of 6.2 W/cm3, the efficiency at 10% load is experimentally reported to be 89%, while the peak efficiency is reported to be 95.6%.",

author = "Nitish Jolly and Ashwin Chandwani and Irabor, {Osarogie Purr} and Ayan Mallik",

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N2 - With the objective of minimizing the power losses in a 2MHz LLC resonant converter, a novel multi-variable design optimization algorithm is developed and analyzed in this paper. Intricately curated constraints and corresponding trade-offs are explained for a complete co-design of a multi-MHz resonant converter. In addition to that, this study also provides detailed quantitative comparison of the effective AC winding resistance of the leakage integrated high frequency planar transformer (HFPT) for different winding configurations, along with comprehensive finite element analysis (FEA) simulations for current density distributions to elucidate the effect of skin and proximity effects. Further, the proposed optimization algorithm is experimentally verified by developing an all-GaN based LLC resonant converter rated at 700W, designed at 2MHz resonant frequency. While achieving a power density of 6.2 W/cm3, the efficiency at 10% load is experimentally reported to be 89%, while the peak efficiency is reported to be 95.6%.

AB - With the objective of minimizing the power losses in a 2MHz LLC resonant converter, a novel multi-variable design optimization algorithm is developed and analyzed in this paper. Intricately curated constraints and corresponding trade-offs are explained for a complete co-design of a multi-MHz resonant converter. In addition to that, this study also provides detailed quantitative comparison of the effective AC winding resistance of the leakage integrated high frequency planar transformer (HFPT) for different winding configurations, along with comprehensive finite element analysis (FEA) simulations for current density distributions to elucidate the effect of skin and proximity effects. Further, the proposed optimization algorithm is experimentally verified by developing an all-GaN based LLC resonant converter rated at 700W, designed at 2MHz resonant frequency. While achieving a power density of 6.2 W/cm3, the efficiency at 10% load is experimentally reported to be 89%, while the peak efficiency is reported to be 95.6%.

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Optimization and Co-Design of a 2-MHz GaN-based 700W LLC Converter

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