RU2318289C1 - Inductor generator - Google Patents

Abstract

FIELD: electrical engineering; electrical machines such as inductor generators.

SUBSTANCE: proposed inductor generator has front and rear end plates with radial holes, stator in the form of stack carrying running winding, rotor in the form of sprocket with axial magnetic circuits, built-in rectifier, field coils mounted on end plates and placed in magnetic contact with axial magnetic circuits, as well as rotor hollow shaft with radial holes, one of its extensions being provided with plug and other one communicates with inlet port of cooling system. Novelty is that rotor is provided with additional disks having radial ducts in vicinity of radial holes of rotor, radial holes of end plates, and end portions of rotor winding.

EFFECT: improved thermophysical characteristics, simplified mechanical design due to dispensing with separate fan.

1 cl, 3 dwg

Description

The invention relates to electric machines, namely to inductor generators.

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

The disadvantage of this machine is its large mass 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.

Also known is a non-contact synchronous generator [2], comprising a front and a back cover with radial holes, a stator, a rotor, a rectifier, an excitation winding; the shaft is hollow with radial holes, one end of the shaft is equipped with a plug, and the second is connected to the inlet of the cooling system; in the bending zone of the claw-shaped poles of the rotor, slots are made.

The disadvantage of this device is the low efficiency of the ventilation effect of the slots in the bend zone of the claw-shaped poles, since these slots have a relatively small area, as well as the low ventilation efficiency of the claws of the poles, due to their cantilever arrangement.

The closest to the claimed invention in technical essence and the achieved results is an inductor generator [3], in which the excitation coils are equipped with additional cheeks made with radial cuts.

However, the ventilation effect of the rotor sprocket is also not efficient enough for this generator, insofar as the distance between the cheeks and the sprocket cannot be increased to obtain a small ventilation resistance, since the air magnetic gap increases, which leads to a decrease in the magnetomotive force.

The invention is aimed at improving thermophysical parameters. This is achieved by the fact that in an induction generator containing front and rear covers with radial holes, a stator in the form of a package with a working winding, with frontal parts a rotor in the form of an asterisk with axial magnetic circuits, a built-in rectifier, excitation coils mounted on the covers and having magnetic contact with axial magnetic circuits, a full rotor shaft with radial holes, while one end is provided with a plug, and the second is connected to the inlet of the cooling system. In this case, the rotor is equipped with additional disks with radial channels, which are installed in the area of the radial holes of the rotor, the radial holes of the covers and frontal parts of the working area.

The drawings show a General view of the inductor generator (Figure 1), an additional disk, front view (Figure 2), side view (Figure 3). The inductor generator contains mounting bushings 1 and 2, a back cover 3, a plug 4 of the hollow shaft 5, bearings 6 and 19 with locking rings 10, a sprocket of the rotor 11 with teeth 12, a stator 13 with a winding 14, consisting of grooved conductors and frontal parts, the front the cover 15, the covers 3 and 15 are provided with radial channels (holes) 16, the field winding 17 with the magnetic circuit 18 and the sleeve of the rotor 22, the shaft contains an inlet 21 and radial holes 23.

The device operates as follows. The inlet air stream enters the central inlet 21 and then through the openings 24 and the channels 10 of the disk 9 under the action of the centrifugal effect, caused in addition to the channels 10 by the presence of teeth 12 of the sprocket, which act as blades, is ejected through the hole 16 in the lids 3 and 15 into the surrounding Wednesday In this case, due to the presence of a hollow shaft, both sides of the frontal parts of the stator are cooled with fresh air, and not heated, as in traditional type generators.

The disk 9 is very technological and can be made of plastics by casting. It is important that during ventilation, fresh air practically does not mix with the internal one and effectively cools the frontal parts of the windings.

The manufacture of this design allows, on the one hand, to abandon a separate fan, assigning its functions to the teeth of the sprocket of the rotor, and on the other hand, to increase the degree of cooling due to the centrifugal effect of the disk channels.

Information sources

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

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

3. RF patent No. 2280308 - Induction generator / A. M. Litvinenko, A. S. Lapkov, application No. 2005101029/09 of 01/18/2005, IPC 7 Н02К 19/06, publ. 07/20/2006, Bull. No. 20.

Claims (1)

An inductor generator containing front and rear covers with radial holes, a stator in the form of a package with a working winding, a rotor in the form of an asterisk with axial magnetic circuits, a built-in rectifier, field coils mounted on the covers and having magnetic contact with axial magnetic circuits, a hollow rotor shaft with radial holes, while one end is provided with a plug, and the second is connected to the inlet of the cooling system, characterized in that the rotor is equipped with additional disks with radial channels, which e installed in the area of the rotor radial holes radial holes and covers the frontal faces of the working winding.

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