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

fYear

2014

fDate

18-21 May 2014

Firstpage

782

Lastpage

789

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE-ASIA), 2014 International

Conference_Location

Hiroshima

Type

conf

DOI

10.1109/IPEC.2014.6869676

Filename

6869676