Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1987-03-16
1988-07-12
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 43, 310 58, 310 63, 310 68D, 310 89, H02K 906
Patent
active
047572213
ABSTRACT:
An alternator for use in an automobile which includes two cooling fans, rear and front, rotatable with the rotor shaft disposed on opposed sides of the rotor, which cooling fans are received in front and rear brackets, respectively. The brackets have inlet ports and outlet ports through which drafts of cooling air are to be drawn in and out of the inner cavity of the alternator through rotation of the fans, attaining cooling of necessary parts e.g. a stator winding, rotor exciting winding, rectifier diode, etc. It is uniquely designed that the one fan on the front side has a suction capacity greater than that of the other fan on the rear side, causing a negative pressure differential between the two suction sections of cooling fans. This results in an additional axial flow of cooling air directed from the rear to the front which contributes to improvement of cooling efficiency for the rectifier diode and rotor exciting winding. Thus the alternator can advantageously be made in compact size yet have a higher output.
REFERENCES:
patent: 4418295 (1983-11-01), Shiga
patent: 4488070 (1984-12-01), Iwaki
patent: 4492885 (1985-01-01), Kitamura
patent: 4588911 (1986-05-01), Gold
patent: 4617485 (1986-10-01), Nakamura
patent: 4659950 (1987-04-01), Gotoh
Kai Kenziro
Kurihashi Yasutaka
Hitachi , Ltd.
Skudy R.
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