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    • 2. 发明授权
    • Alternator for automobile
    • 汽车发电机
    • US4757221A
    • 1988-07-12
    • US26123
    • 1987-03-16
    • Yasutaka KurihashiKenziro Kai
    • Yasutaka KurihashiKenziro Kai
    • H02K19/22H02K9/06H02K11/04
    • H02K11/046H02K9/06
    • 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.
    • 一种用于汽车的交流发电机,其包括两个冷却风扇,后部和前部,可转动,转子轴设置在转子的相对侧上,这些冷却风扇分别被接纳在前支架和后支架中。 支架具有入口端口和出口端口,通过风扇的旋转,冷却空气的通风通过该入口端口和出口被吸入和流出交流发电机的内腔,实现必要部件的冷却,例如, 定子绕组,转子励磁绕组,整流二极管等。其独特设计是,前侧的一个风扇的吸入容量大于后侧另一个风扇的吸入容积,从而在两个吸力之间产生负压差 冷却风扇部分。 这导致从后部引导到前部的冷却空气的额外轴向流动,这有助于提高整流二极管和转子励磁绕组的冷却效率。 因此,交流发电机可以有利地制成紧凑的尺寸,但具有较高的输出。