Title :
A two stage DC/dc converter with wide input range for EV
Author :
Peng Wen ; Changsheng Hu ; Haitao Yang ; Longlong Zhang ; Cheng Deng ; Yashun Li ; Dehong Xu
Author_Institution :
Inst. of Power Electron., Zhejiang Univ., Hangzhou, China
Abstract :
In electrical vehicles (EVs), the DC/DC converter is needed to interface high voltage power battery with 12 V electrical system. The converter is required to adapt the wide range input voltage as well as low-voltage high-current output. Moreover, the converter needs high efficiency and high power density. This paper investigates a two-stage converter with high efficiency including two-phase interleaved Boost converter and full-bridge LLC converter. Firstly the design of the two-stage converter is studied. Then the loss breakdown analysis is given. The conversion efficiency of the two-stage converter is evaluated with both theoretical analysis and experiment. A 1.5 kW prototype is built to verify the analysis.
Keywords :
DC-DC power convertors; battery powered vehicles; secondary cells; EV; conversion efficiency evaluation; electrical system; electrical vehicles; full-bridge LLC converter; high voltage power battery; loss breakdown analysis; power 1.5 kW; two stage DC-DC converter; two-phase interleaved boost converter; voltage 12 V; wide input range; Power generation; Switches; Vehicles; Windings; Zero voltage switching; Boost-LLC converter; Electrical Vehicle (EV); Two-stage converter; Wide Input Range;
Conference_Titel :
Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE-ASIA), 2014 International
Conference_Location :
Hiroshima
DOI :
10.1109/IPEC.2014.6869676
