Vehicle AC generator's stator

Details Vehicle AC generator's stator Vehicle AC generator's stator

1999-11-16

2001-04-03

Nguyen, Tran (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S184000, C310S254100, C310S263000

Reexamination Certificate

active

06211594

ABSTRACT:

CROSS REFERENCE TO RELATED APPLICATION
The present application is based on and claims priority from Japanese Patent Application Hei 10-335637 filed on Nov. 26, 1998, the contents of which are incorporated herein by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an ac generator for a vehicle, and particularly to a stator winding arrangement of an ac generator.
2. Description of Related Art
WO 092/06527 discloses a stator in which a plurality of U-shaped conductor segments are inserted into a plurality of slots of the stator from one end thereof and welded to one another to form a stator winding. Four U-shaped conductor segments are inserted in each slot: two segments are disposed at radially inside layer; the other two segments are disposed at radially outside layer; one segment in each layer extends in one direction; and the other segment in each layer extends in the other direction. Two segments extending from one slot in one direction are welded to two segments extending from another slot in the other direction. Thus, welded portions are aligned in a circle at one end of the stator. Turn portions are also aligned in a circle at the other end of the stator.
If an output terminal end is taken from the segment disposed in the radially inside layer, the output terminal end may be distorted to incline inward. On the other hand the output terminal end may be distorted to incline outward if the terminal end is taken from the segment disposed in the radially outside layer. This causes trouble when the stator is assembled or disassembled.
SUMMARY OF THE INVENTION
An object of the invention is to provide an improved stator having output terminal ends that may not be distorted.
According to a preferred embodiment, the output terminal ends extending from the middle layer is prevented from inclining by the segments disposed in the outside and inside layers.
Another object of the invention is to provide an improved ac generator which has a star-connected stator winding. The stator winding has output terminal ends extending from the segments disposed in the middle layer and neutral terminal ends extending from the segments disposed in the inside layer. Because the neutral terminal ends are taken from the segments disposed in the inside layer, gathered, and welded, they are sufficiently spaced apart to be insulated from frames and output terminals.


REFERENCES:
patent: 1826295 (1931-10-01), Apple
patent: 2407935 (1946-09-01), Perfetti et al.
patent: 2447647 (1948-08-01), Hancock
patent: 2731576 (1956-01-01), McElligott
patent: 3079519 (1963-02-01), Kitson et al.
patent: 5845389 (1998-12-01), Roberts et al.
patent: 5998903 (1999-12-01), Umeda et al.
patent: 92/06527 (1992-04-01), None
patent: 98/54823 (1998-12-01), None

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