Alternator for vehicle

Details Alternator for vehicle Alternator for vehicle

1999-11-12

2001-01-30

Mullins, Burton (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S180000, C310S184000, C310S049540

Reexamination Certificate

active

06181043

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a stator of a vehicle alternator.
2. Description of the Related Art
An alternator disclosed in JP-A-3-235644 has a pair of cooling fans fixed to opposite sides of a rotor. The pair of inner cooling fans take cooling air into frames and discharge the cooling air from windows formed in the circumferential surface of the frames, thereby cooling the stator winding.
U.S. Pat. No. 1,822,261 and WO92/06527 disclose a plurality of U-shaped conductor segments welded to form a stator winding. However, sharp edges may be formed on the welded portions. Such edges may cause concentration of mechanical stress and electrochemical stress, thereby resulting in mechanical breakdown or electrochemical corrosion. Moreover, dust or foreign particles introduced with the cooling air may accumulate on the edges if such a stator winding is cooled by such a inner cooling fans. If salt water is introduced by the inner cooling fans, insulation members disposed in the stator may be deteriorated.
SUMMARY OF THE INVENTION
The present invention is to prevent such mechanical and electrochemical troubles on the connected portion of conductor segments forming a stator winding.
In a stator of an alternator for a vehicle according to a main aspect of the invention, the stator winding is composed of a plurality of conductor segments having end portions extending in opposite direction to each other and a plurality of ball-shaped connected portions between the conductor segments to form continuously connected coils. Each of the ball-shaped connected portions includes one end of one conductor segment and the other end of another conductor segment.
Preferably, the ball-shaped connected portions are disposed at the same end of said stator core. Each of the conductor segments can have a U-shaped portion.
The conductor segments are preferably welded by a non-contact type welder, such as a tungsten inert gas (TIG) welder, to form the connected portions into a ball shape.


REFERENCES:
patent: 1822261 (1931-09-01), Apple
patent: 1843589 (1932-02-01), Apple
patent: 1917482 (1933-07-01), Apple
patent: 2407935 (1946-08-01), Perfetti et al.
patent: 4309634 (1982-01-01), Koroly et al.
patent: 5714824 (1998-02-01), Couture et al.
patent: 5778512 (1998-07-01), Ichikawa et al.
patent: 1005611 (1957-05-01), None
patent: 3-235644 (1991-10-01), None
patent: 92/06527 (1992-04-01), None

Affiliated with

Also associated with

Rating

Alternator 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 Alternator for vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alternator for vehicle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2539546