2026-09-19T16:21:30Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/768232022-01-13T07:54:29Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
Steven B. Leeb and John J. Cooley.
Vickery, Daniel Robert
Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
2013-02-13T21:31:30Z
2013-02-13T21:31:30Z
2011
2011
http://hdl.handle.net/1721.1/76823
825553990
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2011.
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. Page 222 blank.
Includes bibliographical references (p. 219-221).
This thesis presents a new sensor for power monitoring that measures current flow in a circuit breaker without permanent modification of the breaker panel or the circuit breaker itself. At the breaker panel, an inductive pickup and low-power amplifier sense current from the breaker face. Two coupled resonators form an inductive link that serves as a communication channel through the steel breaker panel door. A passive, balanced JFET mixer circuit transmits the sensed current signal through the inductive link by impedance modulation. Outside of the breaker panel door, sense circuitry detects the impedance modulation, and a digitally implemented compensator inverts the non-uniform frequency response of the analog sensor circuitry to reconstruct the original current signal. This sensor provides a solution for low-cost, non-intrusive retrofit of any circuit breaker panel for centralized power monitoring.
by Daniel Robert Vickery.
M.Eng.
222 p.
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by
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http://dspace.mit.edu/handle/1721.1/7582
Electrical Engineering and Computer Science.
A retrot current sensor for non-intrusive power monitoring at the circuit breaker
Thesis
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<Abstract>This thesis presents a new sensor for power monitoring that measures current flow in a circuit breaker without permanent modification of the breaker panel or the circuit breaker itself. At the breaker panel, an inductive pickup and low-power amplifier sense current from the breaker face. Two coupled resonators form an inductive link that serves as a communication channel through the steel breaker panel door. A passive, balanced JFET mixer circuit transmits the sensed current signal through the inductive link by impedance modulation. Outside of the breaker panel door, sense circuitry detects the impedance modulation, and a digitally implemented compensator inverts the non-uniform frequency response of the analog sensor circuitry to reconstruct the original current signal. This sensor provides a solution for low-cost, non-intrusive retrofit of any circuit breaker panel for centralized power monitoring.</Abstract>
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