JPS62189941A - Generator for car - Google Patents

Abstract

PURPOSE:To efficiently cool a generator and miniaturize it and enable high output to be generated, by composing a pump of a fin fitted on the rotor of a generator for a car which is closed by brackets, and by circulating cooling water for an engine. CONSTITUTION:A rotor 3 is closed by fitting a rear bracket 17 and a front bracket 16 firmly on bearings 6, 7 supporting the shaft 2 of the rotor 3 rotatably. The core of the rotor 3 is provided with a fin 25, and a water pump is formed. By rotating the rotor 3, the cooling water of the main unit of an engine is absorbed through an inlet 26, and is circulated to cool the respective sections of a generator as shown by arrow heads, and is fed to an outlet 27, and is fed back to the main unit of the engine. As a result, the generator is efficiently cooled, and the device is miniaturized, and noise is attenuated.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a generator for a vehicle.

[Conventional technology]

Figure 3 shows a conventional vehicle generator. In the figure, 1 is a pulley, 2 is a shaft connected to the pulley 1,
3 is a rotor fixed to this shaft 2; 3a is a claw portion A;
, 3b is the claw portion B, 3c1. ll' is a non-magnetic ring, and 3d is a rotor core. 4 is a front bracket, and 5 is a bracket I/rear, both of which rotatably support the shaft 2 via bearings 6.7. 8 is an excitation coil fixed to the bracket rear 5 via the core 9, 1G is a stator core 'v fixed between the bracket front bracket rear 5, 10a is a stator coil, Jl is a rectifier, and 12 is a voltage regulator. 13 is a fan, and
It is fixed to the shaft 2 together with the shaft 1, and rotates in conjunction with the shaft 2.

A cooling air intake hole 14 is formed in the side surface of the bracket rear 5, and a cooling air discharge hole 15 is formed in the side surface of the bracket front I-4.

Next, the operation will be explained. A pulley 1 is driven by a belt from a prime mover, thereby rotating a rotor 3 fixed to a shaft 2. Claw portion A3a and claw portion B3b of this rotor 3
are inductors that are excited with different polarities by the excitation coil 8, and are arranged facing each other so as to be alternately positioned.As the rotor 3 rotates along the inner circumference of the stator core 10, an induced voltage is generated in the stator coil 10a. Electricity is generated. Since this induced electromotive force is alternating current, it is rectified into direct current by the rectifier 11 and supplied to the battery or electric load. The voltage regulator 12 controls the current of the exciting coil 8 in order to keep the electromotive force induced in the stator coil 10a at a constant voltage. When the fan 13 rotates together with the pulley 1, cooling air is sucked in from the intake hole 14, and the rectifier 11, voltage regulator 12, excitation coil 8, stator core 10, and stator coil 10a
etc. are cooled and discharged to the outside from the discharge hole 15.

[Problem to be Solved by the Invention 3] As mentioned above, in the conventional cooling structure of a generator, the cooling capacity of the fan is insufficient, so when the fan rotates at a low speed with a small air volume, the temperature increases by 1. It is not possible to increase the output current, and because hot air from the engine room is drawn in due to the heat generated by the engine, the temperature of the internal parts of the generator increases, resulting in a greater decrease in the output current. Additionally, expensive materials are required to ensure the heat resistance of each component. On the other hand, there is also the idea of increasing the size of the fan to increase the air volume of the fan, but this poses problems with ease of installation and noise.

As described above, cooling by a fan has a limitation in its cooling capacity, so it has to be designed with a significant drop in output in mind, and each component is also expensive.

This invention was made for TV purposes to solve the above-mentioned problems.It improves the cooling capacity by water-cooling the internal parts of the generator, making the generator smaller, increasing the output, and reducing noise. To obtain a generator for a vehicle that eliminates problems and can reduce the cost of each component.

[Means for solving problems]

A vehicle generator according to the present invention incorporates a water pump for circulating engine cooling water inside the generator.

[Effect]

The generator in the invention of B is cooled by engine cooling water that is circulated by a water pump.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In Figures 1 and 2, 16 is the bracket rear, 17
Bracket fronts L-118 and 19, which together with the bracket rear 16 of B constitute the outer frame of the generator, are fixed to the above-mentioned bracket front [7] and the bracket rear 16, and seals circumferentially contacting the shaft 2; 17 is a heat dissipation fin that cools the rectifier 11 and voltage regulator 12; 22 and 23 are stator coils 10;
a and a coating resin material for imparting corrosion resistance to the excitation coil 8.
25 (fins of the water pump; 26 is the water intake port of the water pump provided on the bracket rear 16, and is connected to a radiator (not shown); 27 is the water pump provided on the bracket rear I6); It is connected to the cooling system of the engine (not shown) through the discharge port. 28 is a gasket for maintaining airtightness.The arrows in the figure indicate the flow of cooling water.

Next, the operation will be explained. When the pulley 1 rotates, the generator starts generating electricity as in the conventional device, but at the same time, the rotation of the fins 25 of the water pump sucks cooling water for the radiator from the water intake port 26. This cooling water cools the stator coil 10a1 and the excitation coil 8 inside the generator, and also passes through the heat radiation fins 20, 21 to the rectifier 11.
The voltage regulator 12 is cooled down and then rotated to the discharge port 27. It is then circulated through the discharge port 27 to the engine cooling system. This cooling water is not compressed or diluted like air, and the amount sent by the pump performs the cooling effect efficiently.

In the case of conventional equipment, hot air of 100°C or higher in the engine room was used as cooling air inside the generator, whereas in the case of the present invention, cooling water cooled to 70°C or lower by the radiator is used. This method cools the inside of the generator, making it possible to significantly reduce temperature rise compared to conventional methods. As a result, the power generation chamber becomes smaller and the temperature increases.
The output current can be increased from low speed rotation to the limit that is allowed.

In addition, in the case of the present invention, there is no problem with noise, and in order to improve the cooling performance, there is no problem even if the fan 25 of the radiator pump is made larger.[Effects of the Invention] As described above, this invention has the following features: 1) Since a water bottle is fully introduced inside the generator and is configured to be cooled by engine cooling water, it is possible to achieve miniaturization and high output, and to solve the problem of noise. This has the effect of eliminating the problem and making each part cheaper.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a back view of the generator, and Fig. 3 is a sectional view of a conventional generator. Rotor, 8 excitation coil, 10 stator core, 1011 stator coil, 11 rectifier, 12 voltage regulator, 1
7 (Yozoraket') Item, 22.231.1: Noting resin material, 25 (Yogata bomb fin, 26
27 and 9 are water suction ports and 9 are discharge ports. In the drawings, the same numbers indicate the same or corresponding parts.

Claims (1)

[Claims] a bracket, a shaft rotatably supported by the bracket, a rotor fixed to the shaft, an excitation coil fixed to the bracket inside the rotor to excite the rotor, and an excitation coil fixed to the bracket fixed to the outer periphery of the rotor to excite the rotor. A stator that generates alternating current induced electromotive force in a stator coil when the rotor is excited and rotates, a rectifier that rectifies the alternating current induced electromotive force into direct current, and a voltage regulator that keeps the voltage of the alternating current induced electromotive force constant. In a vehicle generator, a water pump for circulating engine cooling water is configured in the generator, a water intake port and a discharge port are formed in the bracket, and the internal parts of the generator are heated by the cooling water of the water pump. A vehicle generator characterized by being cooled.