A Single-Stage High-Power-Factor Light-Emitting Diode (LED) Driver with Coupled Inductors for Streetlight Applications

This paper presents and implements a single-stage high-power-factor light-emitting diode (LED) driver with coupled inductors, suitable for streetlight applications. The presented LED driver integrates an interleaved buck-boost power factor correction (PFC) converter with coupled inductors and a half...

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Bibliographic Details
Published in:Applied sciences 2017, Vol.7 (2), p.167-167
Main Authors: Cheng, Chun-An, Chang, Chien-Hsuan, Cheng, Hung-Liang, Tseng, Ching-Hsien, Chung, Tsung-Yuan
Format: Article
Language:English
Subjects:
Circuit design
Circuits
Conduction
converter
Converters
driver
Electric bridges
Electric potential
Electronics
Energy conversion
Harmonic distortion
Inductors
Light emitting diodes
light-emitting diode (LED)
Line current
Mathematical analysis
Mathematical models
Power factor
Ripples
streetlight
Switching
Voltage
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Summary:This paper presents and implements a single-stage high-power-factor light-emitting diode (LED) driver with coupled inductors, suitable for streetlight applications. The presented LED driver integrates an interleaved buck-boost power factor correction (PFC) converter with coupled inductors and a half-bridge-type series-resonant converter cascaded with a full-bridge rectifier into a single-stage power conversion circuit. Coupled inductors inside the interleaved buck-boost PFC converter sub-circuit are designed to operate in discontinuous conduction mode (DCM) for achieving input-current shaping, and the half-bridge-type series resonant converter cascaded with a full-bridge rectifier is designed for obtaining zero-voltage switching (ZVS) on two power switches to reduce their switching losses. Analysis of operational modes and design equations for the presented LED driver are described and included. In addition, the presented driver features a high power factor, low total harmonic distortion (THD) of input current, and soft switching. Finally, a prototype driver is developed and implemented to supply a 165-W-rated LED streetlight module with utility-line input voltages ranging from 210 to 230 V. Experimental results demonstrate that high power factor (>0.99), low utility-line current THD (
ISSN:2076-3417
2076-3417
DOI:10.3390/app7020167