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AssigneeMetglas, Inc.
InventorsNicholas J. DeCristofaro, Gordon E. Fish, Scott M. Lindquist, Carl E. Kroger
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A high efficiency electric motor has a generally polyhedrally shaped bulk amorphous metal magnetic component in which a plurality of layers of amorphous metal strips are laminated together adhesively to form a generally three-dimensional part having the shape of a polyhedron. The bulk amorphous metal magnetic component may include an arcuate surface, and preferably includes two arcuate surfaces that are disposed opposite to each other. The magnetic component is operable at frequencies ranging from about 50 Hz to about 20,000 Hz. When the motor is operated at an excitation frequency “f” to a peak induction level Bmax, the component exhibits a core-loss less than about “L” wherein L is given by the formula L=0.005 f (Bmax)1.5+0.000012 f1.5 (Bmax)1.6, said core loss, said excitation frequency and said peak induction level being measured in watts per kilogram, hertz, and teslas, respectively. Performance characteristics of the bulk amorphous metal magnetic component of the present invention are significantly better than those of silicon-steel components operated over the same frequency range.
An electric motor having at least one low-loss bulk amorphous metal magnetic component comprised of a plurality of substantially similarly shaped layers of amorphous metal strips laminated together with an adhesive agent to form a polyhedrally shaped part, said low-loss bulk amorphous metal magnetic component, when operated at an excitation frequency “f” to a peak induction level Bmax, having a core-loss less than about “L”, wherein L is given by the formula L=0.005 f (Bmax)1.5+0.000012 f1.5 (Bmax)1.6, the core loss, excitation frequency and peak induction level being measured in watts per kilogram, hertz, and teslas, respectively.
For use in an electric motor having a rotor and a stator, at least one low-loss bulk amorphous metal magnetic component comprising a plurality of substantially similarly shaped layers of amorphous metal strips laminated together with an adhesive agent to form a polyhedrally shaped part, wherein said low-loss bulk amorphous metal magnetic component when excited at a frequency f to a peak induction level Bmax has a core-loss less than about “L” wherein L is given by the formula L=0.005 f (Bmax)1.5+0.000012 f1.5 (Bmax)1.6, said core loss, said excitation frequency and said peak induction level being measured in watts per kilogram, hertz, and teslas, respectively.
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