Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Reexamination Certificate
2007-04-30
2009-11-10
Dole, Timothy J (Department: 2831)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
C324S691000
Reexamination Certificate
active
07616010
ABSTRACT:
A technique is disclosed for determining capacitive, inductive, and resistive components of power line impedance. A measurement circuit switches a burden resistor between power line conductors to cause a droop in a voltage waveform. The voltage waveform is sampled prior to inclusion of the resistor in the circuit, as well as after to identify the droop. The short circuit between the power lines is then removed by opening the circuit and a first effective capacitance in the test circuitry causes a resonant ring due to the inductive component of the power line impedance. The process is repeated a second time with a second effective load capacitance enabled in the test circuitry to cause a second resonant ring. Based upon the frequency of the rings and the voltage measurements, the capacitive, inductive, and resistive components of power line impedance can be computed.
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Dole Timothy J
Fletcher Yoder Law
Kuszewski Alexander R.
Rockwell Automation Technologies Inc.
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