Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2005-05-03
2005-05-03
Le, Dang (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S236000
Reexamination Certificate
active
06888285
ABSTRACT:
An electric rotating machine and a fan motor for vehicle are obtained, wherein variation width of current waveform resulting from occurrence of coils in a short circuit state is narrowed to reduce vibration and noise. A commutator26of the fan motor for vehicle comprises twelve segments24, and a pair of positive
egative brushes are press-contacted to the commutator26. Among the segments24, at least one of pairs of segments that the brushes simultaneously contact have mutually different pitches. Therefore, timing when the coil in the short circuit state occurs at an armature and timing when the coil is released from the short circuit state of one brush deviate from those of the other brush temporally. Accordingly, the variation width of current waveform of electric current supplied to the coil connected to the pair of segments24narrows at least. As a result, the vibration of the electric rotating machine, variation of rotating torque, and the noise are considerably reduced, and life thereof is thus extended as well.
REFERENCES:
patent: 1531595 (1925-03-01), Chaix et al.
patent: 1842340 (1932-01-01), Eaton
patent: 4224542 (1980-09-01), Kawano et al.
patent: 4396850 (1983-08-01), Herr
patent: 4406962 (1983-09-01), Fridman et al.
patent: 4433263 (1984-02-01), Longhouse et al.
patent: 5204574 (1993-04-01), Kanno et al.
patent: 5278468 (1994-01-01), Escaravage et al.
patent: 5358341 (1994-10-01), Blaettner et al.
patent: 5497039 (1996-03-01), Blaettner et al.
patent: 5793140 (1998-08-01), Tuckey
patent: 5925962 (1999-07-01), Kobman et al.
patent: 6489703 (2002-12-01), Terada et al.
patent: 9605961-3 (1995-12-01), None
patent: 9901099-2 (2000-01-01), None
patent: 196 52 840 (1997-06-01), None
patent: 199 16 613 (1999-11-01), None
patent: 2 742 590 (1997-06-01), None
patent: 2 779 580 (1999-12-01), None
patent: 52-84405 (1977-07-01), None
patent: 4-93480 (1992-08-01), None
patent: 9-182381 (1997-07-01), None
patent: 11-234967 (1999-06-01), None
patent: 11-318058 (1999-11-01), None
Adachi Isamu
Ito Toshimoto
Natsume Yousuke
Shimmura Tetsuro
Tanino Toshihiro
ASMO Co. Ltd.
Hanh Nguyen N
Le Dang
Parkhurst & Wendel L.L.P.
LandOfFree
Dynamo-electric machine and fan motor for vehicle does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dynamo-electric machine and fan motor for vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamo-electric machine and fan motor for vehicle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3401341