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Title: Half-Bridge LLC Resonant Converter Design for High Voltage Battery to Low Voltage Battery Conversion in Electric Vehicles
Authors: Lordoğlu, Meltem
Polat, Umutcan
Örüklü, Kerim
Yıldırım, Deniz
Keywords: Air conditioning
DC-DC converters
Electric vehicles
HVDC power transmission
Secondary batteries
Converter design
High voltage batteries
Higher efficiency
LLC resonant converter
Low voltage systems
Low voltages
Lower switching loss
Zero- Voltage Switching
Zero voltage switching
Issue Date: 2021
Publisher: Institute of Electrical and Electronics Engineers Inc.
Abstract: The LLC resonant converter has high-efficiency and low switching losses by achieving Zero Voltage Switching (ZVS). Therefore, it has been widely used in the industry. In conventional vehicles, the low voltage systems are fed by the 12V battery. However, several appliances such as the heater, air-conditioning compressor operate at a few kilowatt regions. Thus, the amount of the current drawn by these appliances is relatively higher with the conventional 12V system. To compensate this high current, a 48V level is obtained from the high-voltage batteries via a dc-to-dc converter. In this study, 3kW Half-Bridge LLC resonant converter is designed for high voltage battery to low voltage battery used in electric vehicles by using PSIM. 48V output voltage is regulated with 0.17% by the proposed converter in several cases, which are varied input voltage and loads by changing switching frequency owing to control algorithm. In terms of unit step response, rising and settling times are 5.55 ms and 1.06 ms, respectively. © 2021 Chamber of Turkish Electrical Engineers.
Description: 13th International Conference on Electrical and Electronics Engineering, ELECO 2021 -- 25 November 2021 through 27 November 2021 -- -- 176537
ISBN: 9.78605E+12
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu

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