Current Compensator for LED Driver With a Long Cable Connecting to the Light Source

It is sometimes unavoidable to place light sources and drivers far apart in large-scale LED lighting installation, where a long cable is used to connect the light source to the LED driver. LED drivers typically deliver pulse width-modulated pulses. The long cable inductance will delay the rate of ri...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on power electronics 2017-05, Vol.32 (5), p.3317-3337
Main Authors: Rui Zhou, Yeung, Ryan Shun-Cheung, Chung, Henry Shu-Hung, Chan, John Yau-Chung, Tse, Norman Chung-Fai
Format: Article
Language:English
Subjects:
Cable length effect
Capacitance
Capacitors
Current pulses
dc–dc power conversion
Design for recycling
Diodes
Inductance
LED lighting
Life expectancy
Light
Light emitting diodes
Light sources
Lighting
lighting control
Pulse duration modulation
Pulse width modulation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:It is sometimes unavoidable to place light sources and drivers far apart in large-scale LED lighting installation, where a long cable is used to connect the light source to the LED driver. LED drivers typically deliver pulse width-modulated pulses. The long cable inductance will delay the rate of rise of the current pulses and will also cause negative off-state voltage across the light source. Apart from reducing luminous output, such phenomenon also causes an impact on the life expectancy of the light source. A simple passive current compensator, which is connected between the driver and the light source to mitigate the distortion of the current pulses caused by the cable inductance, is presented. The concept is based on recycling the energy stored in the cable after the end of a current pulse to drive the light source synchronously with the driver at the beginning of the next current pulse, so as to modify the rise time of the current pulses. The topological states and operations of the compensator will be discussed. Simplified design procedure for the compensator will be given. A prototype for a 12 V LED driver to drive LED strips of rated current 4.5 A has been built and evaluated. Experimental results are compared with theoretical predictions.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2016.2617159