Title :
Design considerations and experimental evaluation for LLC resonant converter with wide battery voltage range
Author :
Wenjin Sun ; Hongfei Wu ; Haibing Hu ; Yan Xing
Author_Institution :
Jiangsu Key Lab. of New Energy Generation & Power Conversion, Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
fDate :
Aug. 31 2014-Sept. 3 2014
Abstract :
This paper illustrates design considerations and experimental evaluation for LLC resonant converter with wide battery voltage range based on the FHA (fundamental harmonic approximation) analysis. Different from the conventional LLC design at zero load, the ratio K of the transformer magnetizing inductor LM to the resonant inductor LR in this design is optimized with two charging points (Vo(min), Io(max1)) and (Vo(max), Io(max2)) according to the battery charging profile. A 2.9kW prototype is built to verify the design. And it converts 400V from the Boost PFC to an output voltage range of 36V to 72V dc, achieving a peak efficiency of 96 %.
Keywords :
battery chargers; power conversion harmonics; resonant power convertors; FHA; LLC resonant converter; battery charging profile; boost PFC; fundamental harmonic approximation analysis; power 2.9 kW; resonant inductor; transformer magnetizing inductor; voltage 36 V to 72 V; voltage 400 V; Batteries; Capacitors; Inductors; Schottky diodes; Switching frequency; Video recording; Zero voltage switching;
Conference_Titel :
Transportation Electrification Asia-Pacific (ITEC Asia-Pacific), 2014 IEEE Conference and Expo
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-4240-4
DOI :
10.1109/ITEC-AP.2014.6940766
