Alternator for vehicle

Details Alternator for vehicle Alternator for vehicle

1998-05-26

2000-08-01

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310261, H02K 122

Patent

active

060971304

ABSTRACT:
It is an object of this invention to provide a compact high-power alternator for a vehicle which is good in cooling performance, efficiency, and cost without decreasing a coil resistance or using a magnet. The alternator for the vehicle includes a stator and a rotor. The rotor includes a Lundel-type iron core and a field coil provided on the Lundel-type iron core. The Lundel-type iron core has a cylindrical portion (71), a yoke portion (72), and a claw-like magnetic pole portion (73). The field coil is provided on the cylindrical portion (71). The yoke portion (72) extends from the cylindrical portion (71) in a radially outward direction. The claw-like magnetic pole portion (72) is connected to the yoke portion (72), and is formed so as to surround the field coil. The stator includes a multiple-layer iron core (32). A ratio of an axial-direction length L1 of the multiple-layer iron core (32) to an axial-direction length L2 of the cylindrical portion (71) of the Lundel-type iron core is in a range of 1.25 to 1.75. A ratio of an outside diameter R2 of the cylindrical portion (71) of the Lundel-type iron core to an outside diameter R1 of the claw-like magnetic pole portion (73) of the Lundel-type iron core is in a range of 0.54 to 0.60.

REFERENCES:
patent: 4201930 (1980-05-01), Inagaki et al.
patent: 5233255 (1993-08-01), Kusumoo et al.
Yoshikazu, "Pawl Shape of Rotor Core Structure for Automotive Generator", Patent Abstracts of Japan, Dec. 13, 1988.
Takashi, "Rotary Electric Machine", Patent Abstracts of Japan, Aug. 24, 1985.
Susumu, "AC Power Generator for Vehicle", Patent Abstracts of Japan, Aug. 12, 1994.

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