An energy buffer for constant power loads
Name
1005261430-MIT.pdf
Description
Full printable version
Size
11.24 MB
Format
Adobe PDF
Checksum (MD5)
15e9f291ca34f772462b0439af7173d6
Author(s)
Gutierrez, Manuel, (Scientist in electrical engineering and computer science) Massachusetts Institute of Technology
Advisor(s)
Steven B. Leeb, Peter Lindahl and Arijit Banerjee.
Date Issued
2017
Publisher
Massachusetts Institute of Technology
Abstract
Constant power loads (CPLs) are a class of loads steadily increasing in use. They are present whenever a load is regulated to maintain constant output power, such as with LED drivers in high quality lighting that is impervious to input fluctuations. Because CPLs exhibit a negative incremental input impedance, they pose stability concerns in DC and AC systems. This thesis presents a power converter for a constant power LED bulb that presents a favorable input impedance to the grid. The use of an energy buffer allows the converter to draw variable power in order to resemble a resistive load, while the output consumes constant power. A switched-mode power supply consisting of a cascaded boost and buck converter accomplishes this by storing energy in the boost stage output capacitor. 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.
Description
Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2017.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 111-113).
Subjects
Electrical Engineering and Computer Science.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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