Permanent magnet type rotary machine

Details Permanent magnet type rotary machine Permanent magnet type rotary machine

2011-03-01

2011-03-01

Leung, Quyen (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S045000, C310S049110, C310S156690, C310S156710, C310S156730, C310S156660, C310S106000, C310S156470, C310S156260, C310S145000

Reexamination Certificate

active

07898123

ABSTRACT:
The permanent magnet type rotary machine is capable of reducing cogging torque caused by variation of amounts of magnetic flux in magnetic circuits. The permanent magnet type rotary machine comprises: a stator constituted by stator units, which are coaxially stacked and in each of which a coil is sandwiched between stator yokes; and a rotor including a permanent magnet having magnetic poles, which respectively face magnetic pole teeth of the stator yokes, the rotor being rotatably supported by an output shaft. The stator units in one phase is divided into n (n is an integer one or more), and magnetic centers of at least one pair of the magnetic pole teeth of the adjacent stator yokes, which are vertically arranged, are shifted with a prescribed phase difference so as to mutually cancel their cogging torque.

REFERENCES:
patent: 3549918 (1970-12-01), Hout Henricus et al.
patent: 4933584 (1990-06-01), Harms et al.
patent: 5034642 (1991-07-01), Hoemann et al.
patent: 5291084 (1994-03-01), Shiotsuki et al.
patent: 5410200 (1995-04-01), Sakamoto et al.
patent: 5691583 (1997-11-01), Suzuki et al.
patent: 5760503 (1998-06-01), Tsuchida et al.
patent: 6031305 (2000-02-01), Satoh et al.
patent: 6060800 (2000-05-01), Suzuki et al.
patent: 6259176 (2001-07-01), Isozaki et al.
patent: 6323569 (2001-11-01), Akama
patent: 6479911 (2002-11-01), Koike et al.
patent: 6809438 (2004-10-01), Suzuki et al.
patent: 6867525 (2005-03-01), Ionel et al.
patent: 7291945 (2007-11-01), Nashiki
patent: 2001/0048251 (2001-12-01), Ieoka
patent: 2002/0003382 (2002-01-01), Nakano et al.
patent: 2002/0113501 (2002-08-01), Doi
patent: 2002/0180282 (2002-12-01), Suzuki et al.
patent: 2002/0190585 (2002-12-01), Sakamoto
patent: 2005/0023905 (2005-02-01), Sakamoto
patent: 2005/0121989 (2005-06-01), Suzuki
patent: 2005/0218730 (2005-10-01), Matsushita
patent: 2007/0145834 (2007-06-01), Usui
patent: 2007/0205689 (2007-09-01), Nemoto et al.
patent: 49-97708 (1974-08-01), None
patent: 3-93451 (1991-04-01), None
patent: 9-163798 (1997-06-01), None
patent: 9-286365 (1997-11-01), None
patent: 10-127024 (1998-05-01), None
patent: 2005-253280 (2005-09-01), None
(NREL 2002.pdf) Jan. 2002 NREL/CP-500-30768 “Cogging Torque Reduction in a Permanent Magnet Wind Turbine Generator” E. Muljadi and J. Green, the 21st American Society of Mechanical Engineers Wind Energy Symposium Reno, Nevada, Jan. 14-17, 2002.
Miller.pdf : Miller et al, “Design of Brushless Permanent Magnet Motors”, 1994.
Miller—skew—cog.pdf; Design of Brushless Permanent Magnet Motors, Hendershot, Miller, 1994.
Miller—cogging.pdf : “Design and Brushless Permanent-Magnet Motors”, Miller, 1994.

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