Design and Control of the Phase Shift Full Bridge Converter for the On-board Battery Charger of Electric Forklifts

Tae-Hoon Kim; Seung-Jun Lee; Woojin Choi

Design and Control of the Phase Shift Full Bridge Converter for the On-board Battery Charger of Electric Forklifts

Tae-Hoon Kim

Seung-Jun Lee

Woojin Choi

Vol. 12, No. 1, pp. 113-119, Jan. 2012

10.6113/JPE.2012.12.1.113

Electric Forklift

Lead-Acid Battery

On-Board Charger

Phase-Shift Full Bridge Converter

PDF

Abstract

This paper describes the design and control of a phase shift full bridge converter with a current doubler, which can be used for the on-board charger for the lead-acid battery of electric forklifts. Unlike the common resistance load, the battery has a large capacitance element and it absorbs the entire converter output ripple current, thereby shortening the battery life and degrading the system efficiency. In this paper a phase shift full bridge converter with a current doubler has been adopted to decrease the output ripple current and the transformer rating of the charger. The charge controller is designed by using the small signal model of the converter, taking into consideration the internal impedance of the battery. The stability and performance of the battery charger is then verified by constant current (CC) and constant voltage (CV) charge experiments using a lead-acid battery bank for an electric forklift.

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Cite this article

[IEEE Style]

T. Kim, S. Lee, W. Choi, "Design and Control of the Phase Shift Full Bridge Converter for the On-board Battery Charger of Electric Forklifts," Journal of Power Electronics, vol. 12, no. 1, pp. 113-119, 2012. DOI: 10.6113/JPE.2012.12.1.113.

[ACM Style]

Tae-Hoon Kim, Seung-Jun Lee, and Woojin Choi. 2012. Design and Control of the Phase Shift Full Bridge Converter for the On-board Battery Charger of Electric Forklifts. Journal of Power Electronics, 12, 1, (2012), 113-119. DOI: 10.6113/JPE.2012.12.1.113.