JPH0199460A - Rectifier for automobile ac generator - Google Patents

Abstract

PURPOSE:To improve cooling properties of apparatus by providing the radiation plate of a rectifier with a raised part and by causing a cooling wind passing through said raised part to flow to a rectifying device lead. CONSTITUTION:When a generator is driven, a cooling wind 6 is sucked from the inlet port of a rear bracket 8 by a fan 7, passes through the outer and inner peripheries of a rectifier radiation plate 1 and a raised part 2 provided in said radiation plate 1 and flows to the front bracket 9. In this case, said raised part 2 is opened in the vicinity of the device lead 4 of said rectifier and on said lead 4 side. Also, said lead 4 is positioned on the downstream side of the cooling wind 6 relative to the radiation plate 1. As a result, said cooling wind 6a having passed through said raised part 2 flows through the lead 4 part to cool the latter.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rectifying device for an automotive alternator, and particularly to a structure suitable for cooling the lead portion of a rectifying element.

[Conventional technology]

In conventional devices, cooling of the lead portion of the rectifying element largely depends on cooling of the heat sink.

[Problem that the invention seeks to solve]

Although the above-mentioned conventional technology improves the cooling performance of the rectifying device by providing cut and raised portions on the heat sink, cooling of the lead portions of the rectifying elements relies heavily on the heat sink as in the past.

An object of the present invention is to actively cool the rectifying element lead portion with cooling air.

[Means for solving problems]

The above object can be achieved by providing a cut-and-raised portion in the heat sink of the rectifier and allowing the cooling air passing through the cut-and-raised portion to flow through the rectifier lead portion.

[Effect]

The cut and raised portion provided on the heat sink of the rectifying device is located near the rectifying element and is open to the rectifying element side. Further, the rectifying element is located on the downstream side of the cooling air with respect to the heat sink. Therefore, a portion of the cooling air passes through the cut and raised portion and reaches the lead portion of the rectifying element. This allows the lead portion to be cooled. In addition, by making the opening surface of the cut and raised portion into a chevron shape, the cooling air passing through the cut and raised portion can be concentrated on the nearby lead portion, thereby improving the cooling performance.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

When the generator is driven, cooling air 6 is sucked in by the fan 7 through the intake hole of the rear bracket 8.

The cooling air 6 passes through the outer periphery and inner periphery of the rectifier heat sink 1 and the cut and raised portions 2 provided on the heat sink 1, and passes through to the front bracket 9.

Here, the cut and raised portion 2 is located near the element lead 4 of the rectifier and is open to the lead 4 side. Further, the leads 4 are located on the downstream side of the cooling air 6 with respect to the heat sink 1. Therefore, the cooling air 6a that has passed through the cut and raised 6 is transferred to the lead 4.
The lead 4 is cooled.

According to this embodiment, the cooling air passage is wider than the conventional one by the cut and raised portion. Therefore, the amount of cooling air can be increased, so the cooling performance of the stator and rotor is improved, and high output can be obtained.

〔Effect of the invention〕

According to the present invention, since cooling air can flow through the rectifying element lead portion of the generator, the cooling performance of the lead portion can be improved. This improves the cooling performance of the rectifying element itself, so
It becomes possible to extend the lifespan of rectifying elements and support higher output.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a cut-and-raised portion of an embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of an embodiment of an automotive AC generator to which the present invention is applied. DESCRIPTION OF SYMBOLS 1... Heat sink, 2... Cut and raise, 3... Opening, 4... Rectifying element lead, 5... Rectifying element, 6, 6
a...Cooling air. 1st mouth I゛°° journey station gom...; 6 body i 20th 7...fan 8... Soyabu°->pu, to9...,, 707 tobu', Keshito

Claims (1)

[Claims] 1. A heat sink installed inside the bracket of the generator almost perpendicular to the flow of the cooling air flowing inside the bracket, and a heat sink installed on the surface downstream of the cooling air with respect to the heat sink. In a rectifying device having a plurality of rectifying elements and leads for connecting the rectifying elements, one or more cut-outs having chevron-shaped openings on the rectifying element side are provided in the heat sink near the rectifying elements. A rectifying device for an alternating current generator for an automobile, characterized in that an opening surface thereof is opposed to the commutator lead.