Automotive alternator
AssigneeDenso Corporation
InventorTakaaki Kurahashi
Life of this patent
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Abstract
A rectifying unit has two heat radiation fins to which positive-electrode side and negative-electrode side rectifying elements are fixed respectively. A terminal platform having a connecting terminal provides wiring for the positive-electrode side rectifying element and the negative-electrode side rectifying element. Two heat radiation fins are disposed in a radial direction with respect to a rotary shaft of the rotor. The negative-electrode side heat radiation fin is interposed between the frame and the positive-electrode side heat radiation fin, and is partly overlapped with the positive-electrode side heat radiation fin in the direction of the rotary shaft. An inner radius of the negative-electrode side heat radiation fin is smaller than an outer radius of the cooling air inlet window.
Claims7
An automotive alternator comprising a rotor, a stator disposed in an opposed relationship with said rotor, a frame supporting said rotor and said stator, a rectifying unit converting an alternating-current output of said stator into a direct-current output, a rear cover disposed outside said frame so as to cover said rectifying unit, and a cooling fan introducing cooling air from the outside into an inside space of said frame via said rear cover, said rectifying unit, and a cooling air inlet window of said frame, wherein
- said rectifying unit has a positive-electrode side heat radiation fin to which a positive-electrode side rectifying element is fixed, a negative-electrode side heat radiation fin to which a negative-electrode side rectifying element is fixed, and a terminal platform having a connecting terminal providing wiring for said positive-electrode side rectifying element and said negative-electrode side rectifying element,
- said positive-electrode side heat radiation fin and said negative-electrode side heat radiation fin are disposed in a radial direction with respect to a rotary shaft of said rotor, said negative-electrode side heat radiation fin is interposed between said frame and said positive-electrode side heat radiation fin and is partly overlapped with said positive-electrode side heat radiation fin in the direction of said rotary shaft, and
- said negative-electrode side heat radiation fin has an inner radius smaller than an outer radius of said cooling air inlet window.
Dependencies are inferred from the claim text.