Method and apparatus to perform poly-phase instrumentation with single-phase instruments
AssigneeGeneral Electric Company
InventorWilliam Robert Pearson
Life of this patent
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Abstract
A method and apparatus for generating a poly phase signal set from a single signal output of a single phase instrument. The method comprising: generating a first signal output X representing the single signal output; processing the single signal output to generate a time delayed version Y_Raw of the single signal output by a time delay T; and processing the time delayed version Y_Raw to compensate for frequency changes in the single signal output and generating a second signal output Y of the poly phase signal set. The second signal output Y is displaced from the first signal output X by about 90 degrees.
Claims21
A method for performing poly phase instrumentation using a single signal output of a single phase instrument comprising:
- generating a first signal output X representing the single signal output;
- processing the single signal output to generate a time delayed version Y_Raw of the single signal output by a time delay T;
- and
- processing said time delayed version Y_Raw to compensate for frequency changes in the single signal output and generating a second signal output Y of the poly phase signal set, wherein said second signal output Y is displaced from said first signal output X by about 90 degrees.
A device for performing poly phase instrumentation for generator control using a single signal output of a single phase instrument, the device comprising:
- an I/O device configured to receive a first signal and generate said first signal as a first output;
- a multiplier connected to receive said first signal and generate a multiplied cosine value signal of said first signal;
- a digital delay connected to receive said first signal, said digital delay delaying said first signal to generate a delayed signal;
- a summer connected to receive both the multiplied signal and the delayed signal, the summer generating a summation signal;
- and
- a divider connected to receive said summation signal and a sin value signal and perform a division of said summation signal and said sin value signal to generate a second output, wherein said first and second outputs represent two different phase signals.
Dependencies are inferred from the claim text.