TY - JOUR
T1 - Development of constant-power driving control for light-emitting-diode (LED) luminaire
AU - Huang, Bin-Juine
AU - Chen, Chun-Wei
AU - Ong, Chin-Dian
AU - Du, Bo-Han
AU - Hsu, Po-Chien
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUK-C1-014-12
Acknowledgements: This publication is based in part on work supported by Energy Bureau, Ministry of Economic Affairs, Taiwan, and Award No. KUK-C1-014-12, made by King Abdullah University of Science and Technology (KAUST), Saudi Arabia.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2013/1
Y1 - 2013/1
N2 - The illumination of an LED may be affected by operating temperature even under constant-current condition. A constant-power driving technique is proposed in the present study for LED luminaire. A linear system dynamics model of LED luminaire is first derived and used in the design of the feedback control system. The PI controller was designed and tuned taking into account the control accuracy and robust properties with respect to plant uncertainty and variation of operating conditions. The control system was implemented on a microprocessor and used to control a 150W LED luminaire. The test result shows that the feedback system accurately controls the input power of LED luminaire to within 1.3 per cent error. As the ambient temperature changes from 0 to 40 °C, the LED illumination varies slightly (-1.7%) for constant-power driving, as compared to that of constant-current driving (-12%) and constant-voltage driving (+50%). The constant-power driving has revealed advantage in stabilizing the illumination of LED under large temperature variation. © 2012 Elsevier Ltd. All rights reserved.
AB - The illumination of an LED may be affected by operating temperature even under constant-current condition. A constant-power driving technique is proposed in the present study for LED luminaire. A linear system dynamics model of LED luminaire is first derived and used in the design of the feedback control system. The PI controller was designed and tuned taking into account the control accuracy and robust properties with respect to plant uncertainty and variation of operating conditions. The control system was implemented on a microprocessor and used to control a 150W LED luminaire. The test result shows that the feedback system accurately controls the input power of LED luminaire to within 1.3 per cent error. As the ambient temperature changes from 0 to 40 °C, the LED illumination varies slightly (-1.7%) for constant-power driving, as compared to that of constant-current driving (-12%) and constant-voltage driving (+50%). The constant-power driving has revealed advantage in stabilizing the illumination of LED under large temperature variation. © 2012 Elsevier Ltd. All rights reserved.
UR - http://hdl.handle.net/10754/597961
UR - https://linkinghub.elsevier.com/retrieve/pii/S1359431112005121
UR - http://www.scopus.com/inward/record.url?scp=84866532168&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2012.07.030
DO - 10.1016/j.applthermaleng.2012.07.030
M3 - Article
SN - 1359-4311
VL - 50
SP - 645
EP - 651
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
IS - 1
ER -