Title :
A digital controlled DC-DC converter for electric vehicle applications
Author :
Kim, Bae-Sung ; Kim, Hee-Jun ; Jin, Chunfeng ; Huh, Dong-Young
Author_Institution :
Dept. of Electron., Electr. Control, & Instrum. Eng., Hanyang Univ., Seoul, South Korea
Abstract :
This paper presents a digital controlled DC-DC converter for electric vehicle applications. The proposed system converts high battery voltage of electric vehicle into low voltage for vehicle´s electronic equipments. The power stage of the proposed converter is a phase-shifted ZVS (zero-voltage-switching) full-bridge DC-DC converter, the current doubler and synchronous rectifier circuits are used at the output of the converter for higher efficiency of the converter. Regarding the control of the converter, only one one-chip PIC microcomputer is used for the feedback control of output power and driving all switches. Therefore, the simplest digital control block for this DC-DC converter is established. To verify the performance of the proposed converter, a 1.5kW prototype converter is built and tested. From the experiment, it is obtained the maximum efficiency of 95% at low line and half load.
Keywords :
DC-DC power convertors; digital control; electric vehicles; feedback; rectifiers; zero voltage switching; current doubler; digital controlled DC-DC converter; electric vehicle applications; feedback control; full-bridge DC-DC converter; one-chip PIC microcomputer; phase-shifted ZVS; power 1.5 kW; synchronous rectifier circuits; vehicle electronic equipments; zero-voltage-switching; Digital control; Electric vehicles; Inductors; Rectifiers; Switches; Voltage control; Zero voltage switching;
Conference_Titel :
Electrical Machines and Systems (ICEMS), 2011 International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4577-1044-5
DOI :
10.1109/ICEMS.2011.6073642
