JPS58148640A - Automotive ac generator - Google Patents

Abstract

PURPOSE:To increase the cooling air amount and to increase the output of a generator by providing centrifugal fans at both sides of a rotor, and fixing a fan guide at a clamping bolt for clamping a rectifier mounted on a rear bracket. CONSTITUTION:Centrifugal fans 8a, 8b are fixed by a projection welding or the like to both sides of rotor cores 7a, 7b the first fan 8a intakes cooling air by its rotation from a vent hole 1a for intaking the cooling air of a front side bracket 1 to cool a stator coil 3b and to exhaust it from a vent hole 1b for exhausting it as an arrow A. The second fan 8b intakes cooling air from a vent hole 2a for cooling and intaking a rear bracket 2 to cool an IC regulator 10, and a 3-phase full-wave rectifier 11 and to exhaust from the vent hole for exhausting while cooling the coil 3b as arrows B, C. In this manner, the cooling air flow rate can be increased, thereby increasing the output of a generator.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the cooling structure of an alternator used as a charging device for a vehicle, particularly an automobile.

Conventionally, the 1m alternating current power generation unit of the woodcutter connects a blower core made of a centrifugal fan to the side of the rotor, and generates I by seven rotations.
Cooling air is sucked into the generator body from the ventilation hole on the rear bracket of the IL machine main body storage, and the sucked air is mainly passed through the space of the rotor O-tooth core and the air gearing part with the stator to the 7a engine bracket. I rarely found a configuration in which power generation-like cooling is performed by exhausting the air to the outside from the ventilation hole on the front side bracket. However, in this type of cooling structure, the ventilation resistance of the claw-shaped core space of the rotor is large, and the stator coil rectifier etc. cannot be sufficiently cooled and melted, making it impossible to obtain a large electric motor output t-.

In addition, there is a stator coil in the conventional AC source electric machine! It had the disadvantage that the removal of the Ia device caused the rear bracket to vibrate and bite.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle alternator that can increase the amount of cooling air and increase the generator output.

The present invention aims to increase the cooling air volume by providing centrifugal 7mm on both sides of the rotor and fixing the fan guide ft to the fixing bolt of the rectifier 11 fixed to the rear bracket. .

Examples of the present invention will be described below.

FIG. 1 shows a -*m example of the invention.

In the figure, an annular stator 3 is sandwiched between a front suspension racket 1 and a rear hook bracket 2, which are joined together by through bolts (not shown) to form the n1 heavy electric machine body.This stator 3 is composed of a stator coil wound through a stator core and a slot (not shown).A rotary shaft 4 is rotatably supported by a bearing 5.6 on the brackets 1 and 2. , rotor 7 are coupled.

This rotor 7 has a pair of claw-shaped rotor cores 7m.

7b, a yoke 7C, and a coil 7d installed between them.
l have.

In addition, both 111ffiKFi of the rotor cores 7m and 7b, and the centrifugal fans 8a and gb are fixed by glossejection welding or the like. A pulley 9 is coupled to the rotating shaft 4 and rotated by an engine or the like.

The first centrifugal core/81 generates cooling air t due to its rotation.
70 ton bracket 1 cooling air intake ventilation port 1! I
The stator coil 3b is cooled, and then it is discharged from the discharge vent 1b as shown by the arrow. Further, an IC regulator 10. is introduced into the second centrifugal 7-an 8b through the cooling intake air vent 21 of the rear bracket 2. While cooling the three-phase total 1m rectifying device 11 and cooling the stator coil 3b, the fluid is discharged from the discharge vent 2b as shown by arrows B and CK.

Cooling air also flows between the claws of the rotor cores 7a and 7b from the 7-inch point to the rear as shown by the arrow.

At this time, the blade part of the second centrifugal fan 8b and the moldy part IMt
By holding the fan guide 12 facing the stator coil 3b with the fixing bolts 13 of the three-phase full-wave rectifier [11], the air volume of the second centrifugal fan 8b can be increased, and the full-wave flow rectifier with the stator coil 3b can be increased. [The cooling of the connection part 11 is also improved.

The fan guide method will be explained in detail with reference to FIGS. 2 to 5.

In the figure, the three-phase all-liquid flow system 11 has a cooling fin 11 that follows the cathode in common, a cooling fin 11 & 1 that commonly follows the γ node, and a t-insulated bush ll.
Superimposed through C, J! 4 Reef ■ Lead wire south terminal Zeng 1
1dt-through press-fitting port) 18 (No. 01)
．． The brush holder 101, which is integrated with the IC regulator 10, and the fan guide 12 are press-fitted.14.
15 serves as an output terminal for the okiya and 4.

The nut 16 is attached to the press-fit bolt 13 of the primary three-dimensional rectifier and the fan guide 12 is fixed at three places in total and attached to the vh"6a 11dv terminal 11@, so sunrise
The amount of contact between the rear bracket 20 and the circumferential direction is reduced.

Next, according to this embodiment, a fan guide for measuring the increased wind load of seven cooling persons built into the generator [effectively fixed directly to the flow pig iron, and cooling the flow converter itself] is used. In addition to being able to improve O, the stator coil outlet IIA.

Fixing with a fan guide also has the excellent effect of ensuring the connection of the lead wire in hot weather and preventing heat from touching the bracket of the sun.

As explained above, according to the present invention, it is possible to increase the cooling air volume t and increase the generator output.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a generator showing an embodiment of the present invention, 712
The figure is a front view of 7 unguides fixed to the rectifier, and the stripes 3 to 5 are partial sectional views of FIG. 2.

Claims (1)

[Claims] 1. A stator having an armature coil is fixed to a generator main body, a rotating rotor is arranged inside the stator, and one hook surface of the above-mentioned Fix horseshoe-shaped cooling fins to the opposing parts, and arrange them on the cooling fins.
ltX element and a centrifugal fan coupled to the side surface of the rotor. A patented vehicle alternator that is fixed to a fixing bolt. 2. In the invention described in claim 8/11, a dual-purpose alternator.