RU2488210C2 - Generator - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: in the generator containing the front and rear cover with holes there is a stator in the form of a bundle with inducing windings, rotor with excitation source and claw-shaped tips and a rectifier according to this invention in the area of bending of claw-shaped polar tips there are ventilating inserts made as bases with fins and holes located in-between. Due to manufacturing of simple and easy producible ventilating inserts which can be made, for example, of plastic, intensification of heat processes is reached because number, width and height of ventilating fins in connection with slots in the area of bending of claw-shaped tips are compatible with number and square area of standard fans and it allows either reducing a number of standard fan blade or decreasing their width and it some cases it is reasonable to reject installation of a fan itself.

EFFECT: reduction of power consumed for ventilation and thermal and physical characteristics, improvement of operational performance for generator.

3 dwg

Description

The invention relates to electric machines, namely to synchronous generators of inductor type, used, for example, in automotive electrical equipment.

A known generator containing a shaft, covers with bearings. A rotor in the form of an asterisk is installed on the shaft, having magnetic contact with the stator, in addition, a coil with a winding with a magnetic circuit in magnetic connection with a second magnetic circuit mounted on the rotor and having magnetic contact with the asterisk is installed on one of the covers (one-way excitation). A similar coil can be mounted on the second cover (two-way excitation). Constructive varieties of this generator are described in [1].

The disadvantages of this generator are the large masses and dimensions, as well as the fact that the frontal parts of the stator winding lying behind the stator along the cooling air are cooled by the air already in front of the stator, which is already heated from the frontal parts.

The closest to the claimed invention in technical essence and the achieved results is a non-contact synchronous generator [2], containing a front and rear cover with holes, a stator in the form of a package with a working winding, a rotor with an excitation source and claw-shaped tips, built into the rectifier, the rotor hollow shaft with radial holes.

The disadvantage of this device is the large turbulence excited by the beak-shaped tips of the rotor, which leads to a decrease in the heat transfer intensity, a violation of the synchronism in the stator blower, which ultimately leads to ventilation losses.

The invention is aimed at improving operational characteristics by reducing the power consumption spent on ventilation and improving thermal characteristics.

This is achieved by the fact that in the generator containing the front and rear covers with openings, a stator in the form of a package with a working winding, a rotor with an excitation source and claw-shaped tips, a rectifier, according to the invention, ventilation inserts with ribs and base are installed in the bending zone of the claw-shaped pole pieces, while between the ribs in the base holes are made.

Figure 1 shows a generator in longitudinal section.

Figure 2 shows the ventilation insert in a perspective view.

Figure 3 shows a plot of the rotor with a ventilation insert, a view from the end of the rotor.

This generator contains a bearing 1 on the rectifier side, a brush holder 2, a stator 3, a bearing 4 on the drive side, a pulley 5, fans 6, a front cover 7, beak-shaped rotor tips 8, a rear cover 9, a rectifier 10, a ventilation insert 11. The ventilation insert contains base 12, ribs 13, holes 14 through which fasteners 15 are passed.

The device operates as follows. When the pulley 5 rotates, the stator teeth cross the magnetic field of the beak-shaped tips 8, inducing a current in the working winding, which is then fed through the rectifier to the load. The generator is cooled by standard fans 6, cool the frontal parts of the working winding. In parallel with them work and pole pieces, acting as blades.

The use of this design allows the introduction of simple and technologically advanced ventilation inserts made, for example, from plastic, to intensify thermal processes, since the number, width and height of ventilation ribs in connection with slots in the bending zone of claw-shaped tips are comparable with the number and area of standard fans, which allows you to either reduce the number of blades of a regular fan, or reduce their width, and in some cases, completely abandon a separate fan.

Information sources

1. RF patent No. 2231199 - Non-contact synchronous generator / A.M. Litvinenko, application No. 2003109938, publ. 04/07/2003, bull. No. 17, IPC ⁷ Н02К 19/06.

2. RF patent №2335079 - Synchronous generator / A.M. Litvinenko, I.N. Brain, application No. 2007136433/09 publ. 09/27/2008, bull. No. 27, IPC Н02К 19/36.

Claims (1)

A generator comprising front and rear covers with openings, a stator in the form of a package with a working winding, a rotor with an excitation source and claw-shaped pole pieces, a rectifier, characterized in that in the bend zone of the claw-shaped pole pieces there are ventilation inserts with ribs and a base, while between holes are made in the base with ribs.

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