Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2010-10-15
2011-12-06
Le, Dang D (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S156380
Reexamination Certificate
active
08072108
ABSTRACT:
Apparatus and method for tuning the magnetic field of brushless motors and alternators to obtain efficient operation over a broad RPM range. The motor or alternator includes fixed windings (or stator) around a rotating rotor carrying permanent magnets. The permanent magnets are generally cylindrical and have North and South poles formed longitudinally in the magnets. Magnetically conducting circuits are formed by the magnets residing in magnetic conducting pole pieces (for example, low carbon or soft steel, and/or laminated insulated layers, of non-magnetizable material). Rotating the permanent magnets, or rotating non-magnetically conducting shunting pieces, inside the pole pieces, either strengthens or weakens the resulting magnetic field to adjust the motor or alternator for low RPM torque or for efficient high RPM efficiency. Varying the rotor magnetic field adjusts the voltage output of the alternators allowing, for example, a windmill generator, to maintain a fixed voltage output.
REFERENCES:
patent: 2209558 (1940-07-01), Bing et al.
patent: 2243616 (1941-05-01), Bing et al.
patent: 2287286 (1942-06-01), Bing et al.
patent: 2558540 (1951-06-01), Clos
patent: 4151431 (1979-04-01), Johnson
patent: 4482034 (1984-11-01), Baermann
patent: 4508998 (1985-04-01), Hahn
patent: 4578609 (1986-03-01), McCarty
patent: 5166654 (1992-11-01), Doyelle
patent: 5594289 (1997-01-01), Minato
patent: 6376959 (2002-04-01), Leupold
patent: 6771000 (2004-08-01), Kim et al.
patent: 6864773 (2005-03-01), Perrin
patent: 7567004 (2009-07-01), Smith
patent: 2004/0041481 (2004-03-01), Kuo
patent: 2006/0038457 (2006-02-01), Miyata et al.
patent: 2007/0228856 (2007-10-01), Bates et al.
patent: 62-117558 (1988-11-01), None
patent: WO 88/05976 (1988-08-01), None
Finkle Louis J.
Furia Andrea
Green Kenneth L.
Le Dang D
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