A new control scheme for DC-DC converter feeding constant power load in electric vehicle

Author

Xuhui, Zhang ; Wen, Xuhui ; Qiujian, Guo ; Feng, Zhao

Author_Institution

Inst. of Electr. Eng., Beijing, China

fYear

2011

fDate

20-23 Aug. 2011

Firstpage

1

Lastpage

4

Abstract

When a boost/buck DC-DC converter is added to the traditional voltage source inverters (VSI) drive system of electric vehicles (EV), the drive system is transformed into an electronic cascaded system. A new load current forward feed control strategy for the DC/DC converter is presented in order to improve the DC-link voltage stability. The small-signal model of the DC/DC converter with the proposed scheme is built, the theoretical analysis results based on which show the relationship between several important variables and the DC-link voltage stability. A PMSM drive system with boost/buck DC-DC converter modeled using MATLAB/simulink, and the typical operation condition in EV is simulated to verify the present strategy. The simulation and theoretical analysis results match with good agreement.

Keywords

DC-DC power convertors; electric vehicles; invertors; machine control; permanent magnet motors; synchronous motors; DC-DC converter; PMSM drive system; constant power load; control scheme; electric vehicle; electronic cascaded system; load current forward feed control strategy; voltage source inverters drive system; Batteries; Capacitors; DC-DC power converters; Mathematical model; Stability analysis; Transfer functions; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2011 International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4577-1044-5

Type

conf

DOI

10.1109/ICEMS.2011.6073869

Filename

6073869