TY - GEN
T1 - Controlling the input impedance of constant power loads
AU - Gutierrez, Manuel
AU - Lindahl, Peter
AU - Banerjee, Arijit
AU - Leeb, Steven B.
N1 - Funding Information:
This work was supported by The Grainger Foundation, the MIT-KUST program, and by the Cooperative Agreement between the Masdar Institute of Science and Technology (Masdar Institute), Abu Dhabi, UAE and the Massachusetts Institute of Technology (MIT), Cambridge, MA, USA - Reference 02/MI/MIT/CP/11/07633/GEN/G/00.
PY - 2018/4/18
Y1 - 2018/4/18
N2 - Power electronic circuits often regulate load power and present a constant power load (CPL) to the utility or other electrical source. Because CPLs exhibit a negative incremental input impedance, they pose stability concerns in both DC and AC systems. This paper presents a power converter for a constant power LED lighting load that mitigates these stability concerns by presenting a controllable input impedance to the electrical source. The use of an energy buffer allows the converter to control input power to resemble a resistive load over short times, while still delivering constant output power. Experimental results demonstrate that the converter exhibits a resistive input impedance at frequencies over 0.5 Hz while maintaining constant power to the LED load.
AB - Power electronic circuits often regulate load power and present a constant power load (CPL) to the utility or other electrical source. Because CPLs exhibit a negative incremental input impedance, they pose stability concerns in both DC and AC systems. This paper presents a power converter for a constant power LED lighting load that mitigates these stability concerns by presenting a controllable input impedance to the electrical source. The use of an energy buffer allows the converter to control input power to resemble a resistive load over short times, while still delivering constant output power. Experimental results demonstrate that the converter exhibits a resistive input impedance at frequencies over 0.5 Hz while maintaining constant power to the LED load.
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U2 - 10.1109/APEC.2018.8341600
DO - 10.1109/APEC.2018.8341600
M3 - Conference contribution
AN - SCOPUS:85046977499
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 3452
EP - 3458
BT - APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018
Y2 - 4 March 2018 through 8 March 2018
ER -