Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2008-01-23
2010-11-30
Mullins, Burton (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S216004, C310S216114, C310S256000, C310S400000, C029S596000, C148S321000, C420S027000
Reexamination Certificate
active
07843104
ABSTRACT:
A stator component whose composition and processing enable the component to axially compress magnetic sheets of a stator and also inhibit joule heating of the component to the extent that the need for a separate flux shield can be eliminated. The component is formed of a ductile iron alloy containing, by weight, about 3.25 to about 3.40% carbon, about 3.70 to about 3.80% silicon, about 4.50 to about 4.70% nickel, up to about 0.20% manganese, up to about 0.06% magnesium, less than 0.02% phosphorus, less than 0.02% sulfur, with the balance being iron and incidental impurities. Following heat treatment, the component exhibits properties that inhibit joule heating of the component by eddy currents induced by alternating magnetic fields of the stator.
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Cusick Ernest G.
General Electric Company
Hartman Domenica N.S.
Hartman Gary M.
Mullins Burton
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