Methods and systems for controlling the temperature stability of an inductor
AssigneeGeneral Electric Company
InventorBrian Bowlds
Life of this patent
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Abstract
Methods and systems a method of assembling a proximity probe are provided. The method includes determining a coil wire dimension and coil geometry for the probe such that a resistance versus temperature profile of the coil is approximately constant when the coil is excited with an excitation frequency of approximately 150 kilohertz to approximately 350 kilohertz, and adjusting the coil geometry such that a resistance versus temperature profile of the coil is substantially constant.
Claims20
A method of assembling a proximity probe including a coil, said method comprising:
- determining a coil wire dimension and coil geometry for the probe such that a resistance versus temperature profile of the coil is approximately constant when the coil is excited with an excitation frequency of approximately 150 kilohertz to approximately 350 kilohertz;
- and
- adjusting the coil geometry such that a resistance versus temperature profile of the coil is substantially constant.
A proximity probe configured to monitor a rotatable machine by measuring a gap between said probe and a target associated with the rotatable machine, said proximity probe comprising:
- a coil configured to be located magnetically proximate the target on a first side of the coil, said coil comprising a coil wire dimension and coil geometry for the probe such that a resistance versus temperature profile of the coil is approximately constant when the coil is excited with an excitation frequency of approximately 150 kilohertz to approximately 350 kilohertz;
- and
- a tuning disk positioned proximate a second opposite side of the coil;
- wherein a distance between said first coil and tuning disk is changeable to generate a predetermined scale factor for the coil.
A system for determining a gap defined between an eddy current proximity probe and a target, said system comprising:
- a proximity probe comprising:
- a coil configured to be located magnetically proximate the target on a first side of the coil such that an output signal correlative to a distance between the proximity probe and the target, said coil comprising a coil wire dimension and a coil geometry for the probe such that a resistance versus temperature profile of the coil is approximately constant when the coil is excited with an excitation frequency of approximately 150 kilohertz to approximately 350 kilohertz;
- and
- a tuning disk positioned proximate a second opposite side of the coil wherein a distance between said first coil and tuning disk is changeable to generate a predetermined scale factor for the coil;
- and
- an electronic circuit coupled to said proximity probe configured to transmit an excitation frequency to said proximity probe and to receive the output signal from said proximity probe.
Dependencies are inferred from the claim text.