FAULT DETECTION FOR LAMINATED CORE
First Claim
1. A method of evaluating the condition of a laminated core of an electric machine, comprising:
- positioning a first yoke extending between a first pair of teeth of the laminated core, the first yoke having a pair of arms in engagement with the first pair of teeth and the first yoke being wound with a first winding;
positioning a second yoke extending between a second pair of teeth of the laminated core, the second pair of teeth being different than the first pair of teeth, the second yoke having a pair of arms in engagement with the second pair of teeth and the second yoke being wound with a second winding;
supplying power to an electrical circuit defined by one of the first and second windings to produce a magnetic flux in the yoke corresponding to the one of the first and second windings and defining an excitation yoke; and
measuring a characteristic of an electrical circuit defined by the other one of the first and second windings to identify a fault corresponding to an eddy current between individual laminations in the laminated core.
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Accused Products
Abstract
A method and system for evaluating the condition of a laminated core of an electric machine, and including a first yoke wound with a first winding and having a first pair of arms spanning between a first pair of teeth of the laminated core, and a second yoke wound with a second winding and having a second pair of arms spanning between a second pair of teeth. A power supply provides power to an electrical circuit defined by one of the first and second windings to produce a magnetic flux in the yoke corresponding to the one of the first and second windings and defining an excitation yoke. A monitoring module provides a measurement of a characteristic of an electrical circuit defined by the other one of the first and second windings to identify a fault corresponding to an eddy current between individual laminations in the laminated core.
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Citations
17 Claims
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1. A method of evaluating the condition of a laminated core of an electric machine, comprising:
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positioning a first yoke extending between a first pair of teeth of the laminated core, the first yoke having a pair of arms in engagement with the first pair of teeth and the first yoke being wound with a first winding; positioning a second yoke extending between a second pair of teeth of the laminated core, the second pair of teeth being different than the first pair of teeth, the second yoke having a pair of arms in engagement with the second pair of teeth and the second yoke being wound with a second winding; supplying power to an electrical circuit defined by one of the first and second windings to produce a magnetic flux in the yoke corresponding to the one of the first and second windings and defining an excitation yoke; and measuring a characteristic of an electrical circuit defined by the other one of the first and second windings to identify a fault corresponding to an eddy current between individual laminations in the laminated core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for evaluating the condition of a laminated core of an electric machine, the laminated core including a plurality of radially extending teeth, the system comprising:
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a first yoke having a first pair of arms extending from a transverse portion, the first pair of arms spaced from each other a distance substantially equal to a spacing between a first pair of teeth of the laminated core, and the first yoke being wound with a first winding; a second yoke having a second pair of arms extending from a transverse portion, the second pair of arms spaced from each other a distance substantially equal to a spacing between a second pair of teeth different than the first pair of teeth, and the second yoke being wound with a second winding; a power supply providing power to an electrical circuit defined by one of the first and second windings to produce a magnetic flux in the yoke corresponding to the one of the first and second windings and defining an excitation yoke; and a monitoring module providing a measurement of a characteristic of an electrical circuit defined by the other one of the first and second windings to identify a fault corresponding to an eddy current between individual laminations in the laminated core. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification