RU2400908C2 - Synchronous inductor generator - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: in synchronous generator of proposed design magnetomotive force of excitation winding is used efficiently due to shortened path of magnetic flow travel, since end parts of lids do not participate in its conduction, and magnetic conductive bushing is also unnecessary. Invention makes it possible to use simpler technology of front lid making, which is standard, and to efficiently use action of air flow, since front parts of stators are in zone of blades - clawlike tips action, at the same time application of a separate fan may be avoided.

EFFECT: improved operational characteristics of generator due to reduced capacity of excitation, and improved thermal-physical characteristics of synchronous inductor generators.

2 dwg

Description

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

Known synchronous 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, while on one of the covers (one-way excitation) a coil with a winding and a magnetic circuit is installed, which is magnetically connected to the second axial magnetic circuit mounted on the rotor and having magnetic contact with the asterisk. A similar coil can be mounted on the second cover (two-way excitation). Design features of this generator are described in [1].

The disadvantage of this synchronous generator is the large mass and dimensions, as well as the fact that the frontal parts of the stator windings lying behind the stator along the cooling air are cooled by the air lying in front of the stator 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 low adaptability, because in the inductor design, one of the covers must be completely ferromagnetic, which complicates the manufacturing process.

The invention is aimed at improving performance by reducing the power consumption of excitation and improving thermophysical characteristics.

This is achieved by the fact that in the synchronous generator containing the front and rear covers with holes, two stators in the form of packets with a working winding, an excitation source, a rotor with a hollow shaft and claw-shaped tips, a rectifier, a ferromagnetic cylindrical jumper between the stators, according to the invention, the excitation source is made in the form of conical coils mounted on the lids located inside the teeth of the claw-shaped tips.

The invention is illustrated in the drawing, where in Fig.1 shows the claimed synchronous inductor generator (longitudinal section), Fig.2 is a top view of the claw-shaped tips (scan).

This synchronous generator contains a back cover 1, a first stator 2, a ferromagnetic cylindrical jumper 3, a second stator 4, a front cover 5, claw-shaped tips 6, excitation coils 7 mounted on the covers, a hollow shaft 8, rotating in bearings 9.

The device operates as follows: the incoming air flow through the guide pipe (not shown in the drawing) enters the intake hole of the hollow shaft 8 of the rotor. Through the radial hole, under the influence of the ventilation effect from the claw-shaped tips 6, the stream washes the frontal parts of the windings of the stators 2 and 4 and exits through the ferromagnetic cylindrical jumpers 3. The magnetic flux is excited from the source — the excitation coil 7, thereby closing the circuit: the outer part of the ferromagnetic cylindrical jumper 3, the stators, the working gap, the poles of the claw-shaped tips 6. Next, the voltage is rectified through a rectifier (not shown in the drawing) and enters the on-board network. The external arrangement of the excitation coils 7 with respect to the pole pieces, although causing the appearance of an additional air gap, but leads to a decrease in the dimensions of the device due to the fact that the excitation sources are located in the internal cavities of the generator.

Using this design allows

- to effectively use the magnetomotive force of the field winding due to the shortened path of the magnetic flux, since the end parts of the covers do not participate in its wiring, and there is no need for a magnetically conductive sleeve;

- apply a simpler manufacturing technology for the front cover, which is typical;

- effectively apply the effect of air flow, since the frontal parts of the stators are located in the zone of influence of the blades - claw-shaped tips, while the use of a separate fan can be excluded.

Information sources

1. Zhezherin R.P. - Induction generators / M.-L., Gosenergoizdat, 1961, p. 319, ill.

2. RF patent No. 2231199 - Non-contact synchronous generator / A. M. Litvinenko, application No. 2003109938, publ. 04/07/2003, bull. No. 17, IPC 7 H02K 19/06.

Claims (1)

A synchronous inductor generator comprising a front and a back cover with holes, two stators in the form of packets with a working winding, an excitation source, a rotor with a hollow shaft and claw-shaped tips, a rectifier, a ferromagnetic cylindrical jumper between the stators, characterized in that the excitation source is made in the form of conical coils mounted on the lids located inside the teeth of the claw-shaped tips.

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