Ripple-Current-Charging Strategies for LLC Resonant Converters with Enhanced Frequency-Modulated Control

Cheng Yu Tang; Tzu Hsuan Ho; Cheng Hung Lu

doi:10.1109/IFEEC53238.2021.9661688

Ripple-Current-Charging Strategies for LLC Resonant Converters with Enhanced Frequency-Modulated Control

Cheng Yu Tang
, Tzu Hsuan Ho
, Cheng Hung Lu

Department of Electrical Engineering

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

1 Scopus citations

Abstract

This paper proposes a LLC resonant converter for battery charging applications. In order to increase the charging efficiency and extend the battery life,three charging methods,including the constant current (CC) charging,the pulse-ripple-current (PRC) charging and the sinusoidal-ripple-current (SRC) charging are adopted and investigated. Besides,an enhanced frequency-modulated control (EFMC) is developed for the proposed charger. With the proposed EFMC,the switching frequency will be dynamically regulated according to different battery voltages and load conditions. In addition,because of the zero-voltage switching (ZVS) or the zero-current switching (ZCS) feature,the proposed LLC resonant converter can reduce the circuit losses and increase the charging efficiency. The control strategies will be realized by the digital signal processor (DSP) without adding extra circuit. Operational principles and theoretical analysis will also be presented. Finally,a 720W prototype circuit will be implemented for the 48V battery system. Both simulation and experimental results verify the performance and feasibility of the proposed LLC charger.

Original language	English
Title of host publication	2021 IEEE International Future Energy Electronics Conference, IFEEC 2021
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781665434485
DOIs	https://doi.org/10.1109/IFEEC53238.2021.9661688
State	Published - 2021
Event	2021 IEEE International Future Energy Electronics Conference, IFEEC 2021 - Taipei, Taiwan Duration: 16 Nov 2021 → 19 Nov 2021

Publication series

Name	2021 IEEE International Future Energy Electronics Conference, IFEEC 2021

Conference

Conference	2021 IEEE International Future Energy Electronics Conference, IFEEC 2021
Country/Territory	Taiwan
City	Taipei
Period	16/11/21 → 19/11/21

Bibliographical note

Publisher Copyright:
© 2021 IEEE.

Keywords

Battery charger
LLC resonant converter
frequency modulated
ripple-current-charging methods.

Access to Document

10.1109/IFEEC53238.2021.9661688

Cite this

Tang, C. Y., Ho, T. H., & Lu, C. H. (2021). Ripple-Current-Charging Strategies for LLC Resonant Converters with Enhanced Frequency-Modulated Control. In 2021 IEEE International Future Energy Electronics Conference, IFEEC 2021 (2021 IEEE International Future Energy Electronics Conference, IFEEC 2021). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IFEEC53238.2021.9661688

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title = "Ripple-Current-Charging Strategies for LLC Resonant Converters with Enhanced Frequency-Modulated Control",

abstract = "This paper proposes a LLC resonant converter for battery charging applications. In order to increase the charging efficiency and extend the battery life,three charging methods,including the constant current (CC) charging,the pulse-ripple-current (PRC) charging and the sinusoidal-ripple-current (SRC) charging are adopted and investigated. Besides,an enhanced frequency-modulated control (EFMC) is developed for the proposed charger. With the proposed EFMC,the switching frequency will be dynamically regulated according to different battery voltages and load conditions. In addition,because of the zero-voltage switching (ZVS) or the zero-current switching (ZCS) feature,the proposed LLC resonant converter can reduce the circuit losses and increase the charging efficiency. The control strategies will be realized by the digital signal processor (DSP) without adding extra circuit. Operational principles and theoretical analysis will also be presented. Finally,a 720W prototype circuit will be implemented for the 48V battery system. Both simulation and experimental results verify the performance and feasibility of the proposed LLC charger.",

keywords = "Battery charger, LLC resonant converter, frequency modulated, ripple-current-charging methods.",

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Tang, CY, Ho, TH & Lu, CH 2021, Ripple-Current-Charging Strategies for LLC Resonant Converters with Enhanced Frequency-Modulated Control. in 2021 IEEE International Future Energy Electronics Conference, IFEEC 2021. 2021 IEEE International Future Energy Electronics Conference, IFEEC 2021, Institute of Electrical and Electronics Engineers Inc., 2021 IEEE International Future Energy Electronics Conference, IFEEC 2021, Taipei, Taiwan, 16/11/21. https://doi.org/10.1109/IFEEC53238.2021.9661688

Ripple-Current-Charging Strategies for LLC Resonant Converters with Enhanced Frequency-Modulated Control. / Tang, Cheng Yu; Ho, Tzu Hsuan; Lu, Cheng Hung.
2021 IEEE International Future Energy Electronics Conference, IFEEC 2021. Institute of Electrical and Electronics Engineers Inc., 2021. (2021 IEEE International Future Energy Electronics Conference, IFEEC 2021).

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

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AU - Tang, Cheng Yu

AU - Ho, Tzu Hsuan

AU - Lu, Cheng Hung

PY - 2021

Y1 - 2021

N2 - This paper proposes a LLC resonant converter for battery charging applications. In order to increase the charging efficiency and extend the battery life,three charging methods,including the constant current (CC) charging,the pulse-ripple-current (PRC) charging and the sinusoidal-ripple-current (SRC) charging are adopted and investigated. Besides,an enhanced frequency-modulated control (EFMC) is developed for the proposed charger. With the proposed EFMC,the switching frequency will be dynamically regulated according to different battery voltages and load conditions. In addition,because of the zero-voltage switching (ZVS) or the zero-current switching (ZCS) feature,the proposed LLC resonant converter can reduce the circuit losses and increase the charging efficiency. The control strategies will be realized by the digital signal processor (DSP) without adding extra circuit. Operational principles and theoretical analysis will also be presented. Finally,a 720W prototype circuit will be implemented for the 48V battery system. Both simulation and experimental results verify the performance and feasibility of the proposed LLC charger.

AB - This paper proposes a LLC resonant converter for battery charging applications. In order to increase the charging efficiency and extend the battery life,three charging methods,including the constant current (CC) charging,the pulse-ripple-current (PRC) charging and the sinusoidal-ripple-current (SRC) charging are adopted and investigated. Besides,an enhanced frequency-modulated control (EFMC) is developed for the proposed charger. With the proposed EFMC,the switching frequency will be dynamically regulated according to different battery voltages and load conditions. In addition,because of the zero-voltage switching (ZVS) or the zero-current switching (ZCS) feature,the proposed LLC resonant converter can reduce the circuit losses and increase the charging efficiency. The control strategies will be realized by the digital signal processor (DSP) without adding extra circuit. Operational principles and theoretical analysis will also be presented. Finally,a 720W prototype circuit will be implemented for the 48V battery system. Both simulation and experimental results verify the performance and feasibility of the proposed LLC charger.

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KW - frequency modulated

KW - ripple-current-charging methods.

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ER -

Tang CY, Ho TH, Lu CH. Ripple-Current-Charging Strategies for LLC Resonant Converters with Enhanced Frequency-Modulated Control. In 2021 IEEE International Future Energy Electronics Conference, IFEEC 2021. Institute of Electrical and Electronics Engineers Inc. 2021. (2021 IEEE International Future Energy Electronics Conference, IFEEC 2021). doi: 10.1109/IFEEC53238.2021.9661688

Ripple-Current-Charging Strategies for LLC Resonant Converters with Enhanced Frequency-Modulated Control

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