Affiliation of Author(s):自动化学院
Journal:IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Key Words:Adaptive control bidirectional converter light-emitting diode (LED) LED driver power factor correction (PFC)
Abstract:In this paper, an electrolytic capacitor-less ac-dc light-emitting diode (LED) driver, consisting of a power factor correction (PFC) converter and a buck/boost bidirectional converter, is investigated. The buck/boost bidirectional converter is connected in parallel with the output of the PFC converter and serves to absorb the second harmonic current in the PFC output current, leaving only a dc component to drive the LEDs. This paper proposes an adaptive voltage control scheme for the storage capacitor in the buck/boost bidirectional converter to make the storage capacitor voltage adaptively decrease as the load becomes lighter. Hence, the power losses of the buck/boost bidirectional converter could be reduced at light load. Experimental results are provided to verify the effectiveness of the proposed control scheme.
ISSN No.:0278-0046
Translation or Not:no
Date of Publication:2017-01-01
Co-author:He, Jiexiu,张力
Correspondence Author:He, Jiexiu,rxb
Date of Publication:2017-01-01