Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles
Patent
1995-08-15
1997-03-18
Ryan, Patrick
Stock material or miscellaneous articles
All metal or with adjacent metals
Having metal particles
428548, 428652, B32B 900
Patent
active
056131887
ABSTRACT:
An induction motor is provided with a secondary portion 20 comprising an interlaced conductor/back-iron (or ferromagnetic) portion 60 and a purely ferromagnetic back-iron portion 62. The interlaced portion 60 comprises an electrically conductive lattice (or foam) material 61 having pores 63 filled with a ferromagnetic material which results in two interlaced lattices 61,63 which are continuous through a shared volume. The interlaced region 60 provides both good magnetic permeability for passing magnetic flux 30 and good electrical conductivity for flowing induced electrical currents necessary for induction motors. As a result, the effective magnetic gap G1 is minimized while also providing a low-cost induction motor. Alternatively, the lattice 61 may be a ferromagnetic material which is embedded with a conductor.
REFERENCES:
Ciekot, Jerzy et al., "Infiltrated Iron Matrix Powder Composites for Magnetic Applications." Societe Fran.cedilla.aise de Metallurgie et de Materiaux, Colloquium: Powder Metallurgy Materials Featuring Specific Physical Properties, Apr. 6-8, 1992, pp. 12-1 - 12-6.
Blok, Henryk et al., "Soft Magnetic Powder composites for Magnetic Cores of Electrical Equipment." Societe Fran.cedilla.aise de Metallurgie et de Materiaux, Colloquium: Powder Metallurgy Materials Featuring Specific Physical Properties, Apr. 6-8, 1992, pp. 17-1 - 17-10.
Energy Research and Generation, Inc., brochure entitled "Duocel.RTM. Aluminum Foam".
Weglinski, Bogumil, "Soft Magnetic Powder Composites - Dielectromagnetics and Magnetodielectrics." ISSN 0379-0002, vol. 4, No. 2 1990, Reviews on Powder Metallurgy and Physical Ceramics, pp. 79-154.
Weglinski, Bogumil, "Sinters for Magnetic Applications." Institute of Electric Machine Systems, Technical University of Wroclaw, 1988, pp. 1-119 .
Kettle John L.
Miller Robin M.
Piech Zbigniew
DePardo Gerald L.
Lam Cathy F.
Ryan Patrick
United Technologies Corporation
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