RU2383779C2 - Windmill stator - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: invention relates to wind power engineering and can be used in wind-driven generators with, primarily, low-speed windwheels. Wind-driven generator stator comprises coil, excitation source and magnetic cores. The latter are fitted on coil arranged in plane parallel to those of windwheel rotation. Note here that air gaps in magnetic cores are oriented in opposite directions from coil center to its periphery.

EFFECT: ease of manufacture thanks to applying coil-type windings and shunting one of magnetic cores (windwheel stopped) to rule out magnetic flux reduction in another core, higher emf efficiency.

4 dwg

Description

The invention relates to the field of wind energy, namely to wind generators with predominantly low-speed wheels.

Known wind generators with stators of the traditional type [1] or segment type [2].

Of all the known analogues, the closest is the stator of a segment-type wind generator [3], which is based on a magnetic system and includes coils, an excitation source and magnetic circuits.

The disadvantage of this stator is that it is adapted to work with only two wind wheels, since it has a coil placed perpendicular to the planes of rotation of the wind wheels.

The invention is aimed at reducing the mass and dimensions of the generator while minimizing its cost.

This is achieved by the fact that the stator of the wind generator contains a coil, an excitation source and magnetic cores, according to the invention the magnetic cores are mounted on a coil placed in a plane parallel to the planes of rotation of the windwheels, and the air gaps of the magnetic cores are oriented in opposite directions from the center of the coil.

The technical result is provided due to the fact that in the stator of the wind generator containing the coil, the excitation source and the magnetic cores installed on the coil placed in a plane parallel to the planes of rotation of the windwheels, the air gaps of the magnetic cores are oriented in opposite directions, the pole pieces have a simple technological shape and quantity sets of excitation sources and pole pieces is limited only by the dimensions of the coil and the number of wind wheels that can em be more than two.

The invention is illustrated by drawings, in which Fig. 1 shows a stator with a wind generator, front view, Fig. 2 is a side view, Fig. 3 shows a winding with magnetic cores, a front view, and Fig. 4 is a section through one of the cores .

The wind generator has a tower 1, on which a rotary base 2 with a traverse 3 is mounted. Bearing assemblies 4 of the wind wheel 5 are mounted on the traverse. A stand 6 with the upper wind wheel 7 and its bearing assembly 8, as well as a coil 9, a stator of the upper wind wheel 10 and the stators of the lateral wind wheels 11, 12. The wind generator contains a tail 13, and each stator contains an excitation source 14 (permanent magnet). The stator of the wind generator contains an excitation source (permanent magnet) and two tips "G" -shaped. The first tip of the "G" -shaped form comprises a first side 15 and a second side 16, with which the teeth 17 of the rotor element 18 are in contact with the gap. The teeth in figure 1 and figure 2 are not shown conditionally due to the small scale. The second tip likewise comprises a first side 19 and a second 20, with which the teeth 17 (their second side) also come into contact in the air gap. The coil 9, as can be seen in figure 1 and figure 3, has the shape of a torus, and, as can be seen from figures 1 and 2, is placed in a plane parallel to the planes of rotation of the wind wheels. Magnetic cores 10, 11 and 12 are installed on opposite sides of the center of the coil 9 (see figure 3). Their air gaps are also oriented in opposite directions from the center (from the center along the radius to the periphery). This orientation is maintained for any magnetic circuits relative to the coil 9, while there may be not only 3, as shown in figure 3, but also more. Thus, the air gaps 21 between the sides 16, 20 and the teeth 17 are also located on the periphery of the coil 9. Therefore, the magnetic flux path is as follows: the north pole of the magnet 14, the first side 15, the second side 16 of the upper tip (figure 4), the air gap 21, tooth 17, air gap 21, second side 20 and first 19 of the lower tip (FIG. 4), south pole of magnet 14. As follows from FIG. 4, the second sides 16 and 20 of the upper and lower tips serve only to concentrate the magnetic flux in the gap 21. The fastening of the coil is carried out by straps 22 and bolted 23.

The stator works as follows: during rotation of the wind wheel, the rotor elements 18 with teeth 17 mounted on the blades of the wind wheels 5, 7 periodically enter into magnetic contact each with its own magnetic circuit, namely, teeth 17 with the second sides 16, 20 of the tips. As a result, in the coil 9 adjacent to the excitation source, an EMF is induced, which is then transmitted to the consumer.

The techno-economic advantage of this stator is its high manufacturability, based on the use of a coil type winding, as well as the fact that with the possible shunting of one of the magnetic circuits (when the wind wheel is stopped), the magnetic flux in the other does not decrease, and when two wind wheels and, accordingly, rotor ones rotate EMF elements in the branches of the coil are summed. In addition, it is possible to connect several (more than two) wind wheels, while in the prototype only two rotors-wind wheels can be connected.

Information sources

A.S. USSR No. 8617116 / I.P. Kopylov et al. - Direct gear wind turbine BI No. 11, 1981, F03D 1/100.

RF patent No. 2204734 / A.M. Litvinenko - Stator of a wind generator. BI No. 14, dated May 20, 2003, No. 2001129417/06 dated October 31, 2001, MKI F03D 9/100.

RF patent №2298687 - Stator of a wind power unit, publ. BI No. 13, dated May 10, 2007, building No. 2006104645/06, dated February 14, 2006, IPC F03D 9/00; Н02К 21/00.

Claims (1)

The stator of the wind generator containing a coil, a source of excitation and magnetic cores, characterized in that the magnetic cores are mounted on a coil placed in a plane parallel to the planes of rotation of the windwheels, and the air gaps of the magnetic cores are oriented in opposite directions.

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