Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Reexamination Certificate
2005-03-29
2005-03-29
Deb, Anjan K. (Department: 2858)
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
C324S242000, C324S701000
Reexamination Certificate
active
06873152
ABSTRACT:
A differential probe is scanned along a stator core tooth portion to detect lamination faults. The probe utilizes two magnetic flux injection yokes arranged side-by-side in relatively close proximity, each yoke having two arm portions and two core-tooth flux-injection surfaces, each yoke being wound with an excitation coil winding and at least one yoke-arm of each yoke having a magnetic flux sensor. Current is supplied to the excitation coil windings on each yoke to inject magnetic flux into the stator core laminations while the probe is moved in a scanning process along the core teeth across the laminations. The magnetic flux differential detected at adjacent regions in the core by flux sensors on each of the two yokes is used to incrementally evaluate the core for laminations faults. The output produced by the differential probe may be converted to a digital signal and provided to a computer system for storage and future analysis.
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Kliman Gerald Burt
Lee Sang-Bin
Shah Manoj Ramprasad
Deb Anjan K.
General Electric Company
Nixon & Vanderhye P.C.
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