2026-09-20T07:54:08Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/1128502026-06-06T00:55:00Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
Jeffrey H. Lang.
Garza, Felipe J., III
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science.
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
2017-12-20T17:25:18Z
2017-12-20T17:25:18Z
2017
2017
http://hdl.handle.net/1721.1/112850
1015248102
Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2017.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 121-122).
Vibration energy harvesters may be used as power sources for low-power, self-sufficient, wireless industrial sensors. State-of-the-art vibration energy harvesting uses switching power electronics to synthesize compact conjugate matched loads allowing for maximum harvested power. Previous work demonstrating dual-frequency vibration energy harvesting used a piezoelectric harvester loaded with analog-controlled power electronics but was unable to cancel the parasitic output capacitance typical of piezoelectric harvesters at both frequencies. This thesis addresses the technical challenge of achieving maximum power transfer from multi-frequency vibration energy sources, simultaneously. Improved dual-frequency energy harvesting is demonstrated using a piezoelectric vibration energy harvester loaded with digitally-controlled power electronics. The digital controller - performing fixed-point computations - allows for synthesis of a band-limited negative capacitor needed to improve dual-frequency energy harvesting.
by Felipe J Garza III.
M.Eng.
122 pages
eng
Massachusetts Institute of Technology
MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission.
http://dspace.mit.edu/handle/1721.1/7582
Electrical Engineering and Computer Science.
A power electronic approach to improved dual-frequency vibration energy harvesting
Thesis
application/pdf
Publication
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unknown
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<Abstract>Vibration energy harvesters may be used as power sources for low-power, self-sufficient, wireless industrial sensors. State-of-the-art vibration energy harvesting uses switching power electronics to synthesize compact conjugate matched loads allowing for maximum harvested power. Previous work demonstrating dual-frequency vibration energy harvesting used a piezoelectric harvester loaded with analog-controlled power electronics but was unable to cancel the parasitic output capacitance typical of piezoelectric harvesters at both frequencies. This thesis addresses the technical challenge of achieving maximum power transfer from multi-frequency vibration energy sources, simultaneously. Improved dual-frequency energy harvesting is demonstrated using a piezoelectric vibration energy harvester loaded with digitally-controlled power electronics. The digital controller - performing fixed-point computations - allows for synthesis of a band-limited negative capacitor needed to improve dual-frequency energy harvesting.</Abstract>
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