Low core loss amorphous metal magnetic components for electric motors
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United States of America Patent
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Aug 31, 2004
Grant Date -
Aug 5, 2004
app pub date -
Feb 3, 2003
filing date -
Feb 3, 2003
priority date (Note) -
Expired
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Abstract
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 B.sub.max, the component exhibits a core-loss less than about 'L' wherein L is given by the formula L=0.005 f (B.sub.max).sup.1.5 +0.000012 f.sup.1.5 (B.sub.max).sup.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.
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