Resonant current sensor
OwnerJames Alan Niemann, Jonathan Ephraim David Hurwitzinventors
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Abstract
A current sensor system is provided where the self-resonant frequency of a current measurement coil, such as a Rogowski coil, may be modified. The current sensor system comprises a current measurement coil and a resonant frequency modification circuit. The resonant frequency modification circuit is configured to modify a resonant frequency of the current sensor system such that a combined resonant frequency of the current measurement coil and the resonant frequency modification circuit is different from a self-resonant frequency of the current measurement coil.
Claims20
A current sensor system comprising:
- a current measurement coil configured to measure a current flowing through a conductor, the current measurement coil having a self-resonant frequency;
- and
- a resonant frequency modification circuit coupled to the current measurement coil, the resonant frequency modification circuit configured to modify a resonant frequency of the current sensor system such that a combined resonant frequency of the current measurement coil and the resonant frequency modification circuit is different from the self-resonant frequency of the current measurement coil.
A method of measuring current using a current sensor system comprising a current measurement coil having a self-resonant frequency and a resonant frequency modification circuit, the method comprising:
- modifying a resonant frequency of the current sensor system, such that a combined resonant frequency of the current measurement coil and the resonant frequency modification circuit is different from the self-resonant frequency of the current measurement coil.
A current sensor system comprising:
- a current measurement coil configured to measure a current flowing through a conductor, the current measurement coil having a self-resonant frequency;
- and
- a variable resonant frequency modification circuit coupled to the current measurement coil, the variable resonant frequency modification circuit configured to modify a resonant frequency of the current sensor system by:
- modifying an effective capacitance coupled across the current measurement coil such that a combined resonant frequency of the current measurement coil and the variable resonant frequency modification circuit is different from the self-resonant frequency of the current measurement coil.
Dependencies are inferred from the claim text.