Shielded Rogowski coil assembly and methods
First Claim
Patent Images
1. A Rogowski coil assembly comprising:
- a first Rogowski coil surrounding a conductor and generating a first voltage output signal; and
a second Rogowski coil surrounding the conductor and generating a second voltage output signal;
wherein the first voltage output signal and the second voltage output signal are processed to address noise components in the first and second output voltage signal.
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Abstract
Shielded Rogowski coil systems having separate interface cables and methods for eliminating and monitoring noise in signal transmissions over the cables.
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Citations
35 Claims
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1. A Rogowski coil assembly comprising:
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a first Rogowski coil surrounding a conductor and generating a first voltage output signal; and a second Rogowski coil surrounding the conductor and generating a second voltage output signal; wherein the first voltage output signal and the second voltage output signal are processed to address noise components in the first and second output voltage signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A Rogowski coil assembly comprising:
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a first Rogowski coil comprising a first printed circuit board and a first conductive winding thereon, the first coil surrounding a conductor and generating a first voltage output signal proportional to a rate of change of current flowing through the conductor; a second Rogowski coil comprising a second printed circuit board and a second conductive winding thereon, the second coil surrounding the conductor and generating a second voltage output signal proportional to the rate of change of current flowing through the conductor; and a pair of interface conductors, each of the pair of interface conductors transmitting one of the first and second voltage output signals. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A Rogowski coil system comprising:
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a conductor; a first Rogowski coil comprising a conductive circuit board and a right handed coil formed thereon, the right handed coil receiving the conductor generating a first voltage output when the conductor is energized; a second Rogowski coil comprising a conductive circuit board and a left handed coil formed thereon, the left-handed coil receiving the conductor and generating a generating a second voltage output when an energized conductor is passed through the coil; a first interface conductor terminated to the first coil; and a second interface conductor separately provided form the first interface conductor, the second interface conductor terminated to the second coil. - View Dependent Claims (21, 22, 23, 24)
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- 25. The Rogowski coil assembly of claim 25, further comprising a microprocessor based device connected to each of the first and second interface conductors, the microprocessor based device programmed to determine a level of noise in first and second output voltage signal.
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27. A method of monitoring current with a Rogowski coil assembly, the method comprising:
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providing a first Rogowski coil having a first winding; providing a second Rogowski coil having a first winding extending opposite to the first winding; connecting an interface conductor to each of the first and second coils; obtaining distinct voltage outputs from each of the first and second Rogowski coils; and applying a noise effect algorithm, using a microprocessor based device, to the voltage outputs. - View Dependent Claims (28, 29, 30, 31)
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32. A Rogowski coil system comprising:
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first and second sensing coils formed on respective circuit boards and configured for induced voltage measurements corresponding to current flow in a conductor passing through the coil; and means for monitoring noise conditions during operation of the coils. - View Dependent Claims (33, 34)
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35. The system of claim 35 further comprising means for shielding the connection of the means for interfacing with the means for monitoring.
Specification