DocumentCode :
1710974
Title :
A modified average current-mode controller for converter-based optimal battery charging
Author :
Singh, R.K. ; Mishra, Santanu
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol. Kanpur, Kanpur, India
fYear :
2011
Firstpage :
1
Lastpage :
6
Abstract :
This paper presents an average current mode controller with a feedback clamp circuit for converter based optimal battery chargers. Similar to conventional controllers, the proposed implementation enables the converter to work as a current source when the battery state-of-charge (SOC) is below a predefined reference level and automatically reverts to voltage source when the battery SOC exceeds the predefined reference level. However, the proposed implementation avoids the use of separate voltage and current loops and extra switching circuits to achieve current and voltage source property of the converter. As the current clamping in the proposed implementation is not based on saturation of the error amplifier, it is always feedback controlled and the transition between constant current to constant voltage mode is fast. The proposed implementation adapts well to pulse charging technique. Experimental and simulation results verify the application of the proposed circuit in a synchronous buck converter and boost-buck converter with coupled inductor of 10 W and 250 W, respectively.
Keywords :
battery chargers; electric current control; feedback; secondary cells; switching circuits; switching convertors; SOC; battery state-of-charge; converter-based optimal battery charging; current loops; feedback clamp circuit; modified average current-mode controller; power 10 W; power 250 W; switching circuits; voltage loops; Batteries; Clamps; Gain; Inductors; System-on-a-chip; Transfer functions; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicle Power and Propulsion Conference (VPPC), 2011 IEEE
Conference_Location :
Chicago, IL
ISSN :
Pending
Print_ISBN :
978-1-61284-248-6
Electronic_ISBN :
Pending
Type :
conf
DOI :
10.1109/VPPC.2011.6043211
Filename :
6043211
Link To Document :
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