Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2011-03-08
2011-03-08
Hanh, Nguyen N (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
Reexamination Certificate
active
07902709
ABSTRACT:
A permanent magnet included in a rotor of a brush-less motor is a radial anisotropic magnet in which multi-poles are magnetized in the circumferential direction and is skew magnetized along the axial direction in such a manner that a surface to one end part of an upper side from a central part in the axial direction and a surface to an end part of a lower side from the central part are axially shifted by a predetermined angle in the circumferential direction from each other. In accordance with this skew-magnetization, coggings including irregularly varying components generated in the rotor owing to the three-dimensional shapes of coil ends provided at opposite ends of a tooth611afor fixing a winding have opposite phases to each other, so that the coggings are cancelled with each other. Accordingly, the coggings can be reduced or cancelled.
REFERENCES:
patent: 7034424 (2006-04-01), Kometani et al.
patent: 7541710 (2009-06-01), Nemoto et al.
patent: 2002/0047431 (2002-04-01), Fukushima
patent: 2003/0201137 (2003-10-01), Crapo et al.
patent: 2007/0273241 (2007-11-01), Niguchi et al.
patent: 2001-314050 (2001-11-01), None
patent: 2005-65455 (2005-03-01), None
Hanh Nguyen N
JTEKT Corporation
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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