RU2253042C1 - Stator of wind electric generator - Google Patents

Abstract

FIELD: wind power engineering; wind electric generators.

SUBSTANCE: proposed stator of wind electric generator contains magnetic circuits, excitation system, bracing members and winding. According to invention, stator is made in form of two pairs of U-shaped magnetic circuits. Upper pair is pointed with bridges downwards. Excitation system is installed between adjacent points. Lower pair is pointed with bridges up-wards and is enclosed by coil located between adjacent posts.

EFFECT: reduced mass and overall dimensions of generator at minimization of its cost.

3 dwg

Description

The invention relates to the field of wind energy.

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

Of all the known analogues, the stator of the wind generator [3] of the segment type, which is based on the magnetic system of a direct current machine or universal, is the closest to the claimed one according to the set of essential features.

The disadvantage of this stator is that it is adapted to work only with an inductor previously cut in diameter, which complicates the manufacturing technology and increases the mass.

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 is made in the form of two pairs of U-shaped magnetic cores, with the upper pair of magnetic cores oriented with jumpers down, an excitation system installed between adjacent racks, the lower pair oriented with jumpers up and covered by a coil that is located between adjacent racks, and the magnetic cores are equipped with coupling elements pairwise tightening jumpers and racks.

The achievement of the technical result is due to the fact that U-shaped magnetic cores, which are widespread, have a large range of sizes, and can easily be made from W-shaped ones by cutting off one of the racks, are selected as the basic element.

The invention is illustrated by drawings, where Fig. 1 shows a stator of a wind generator, front view, Fig. 2 is a side view, Fig. 3 shows a general view of a wind generator equipped with this stator.

The stator of the wind generator is assembled on the basis of four identical elements - U-shaped magnetic cores. Each of them has one jumper and two racks, but structurally the jumper and racks comprise one stamped type part. The stator, as shown in figure 1, has a lower left magnetic circuit with a rack 1, a winding 2, a second rack 3 and a jumper 4, a left upper magnetic circuit with a jumper 5, a rack 6, a fixing upper bar 7, a clamp member (hairpin) 8, the second stance 9.

The strut 9 is adjoined by a coupling element — a bar 10, which is pulled together through a pin 11 with another similar bar, which is adjacent to the bar 12 of the upper right magnetic circuit. It has a jumper 13 and a second rack 14. Between the rack 9 of the left magnetic circuit and the rack 12 of the upper right magnetic circuit is an excitation system 15 (for example, a permanent magnet). The lower right magnetic circuit, as well as the lower left one, is equipped with lower strips 16, which are tightened with the upper coupling elements 8. The lower right magnetic circuit has a right post 17, a jumper 18 and a left post 19. A U-shaped rotor element with a jumper is magnetically connected 20 and uprights (pole tips) 21. Such a segment-type stator is included in a wind generator that has a wind wheel with a horizontal axis with blades 22 (see Fig. 3), a hub 23, a movable rotary base 24 mounted on a tower 25 and equipped with m tail element 26.

The operation of the stator is as follows. The stator 21 is installed under the base and periodically comes into magnetic contact with rotor elements, which are mounted on the blades of a wind wheel. As a result, an electromotive force will be induced in the coil 2, which will lead to the appearance of voltage at the terminals of the coil connected to the load.

The technical and economic advantage of this stator is its high manufacturability, based on the modular structure of the U-shaped magnetic cores. This leads to a decrease in mass and dimensions, while the cost is the lowest possible, which is important for wind power facilities.

Sources of information

1. A.S. USSR No. 732572 / V.K.Alexandrov et al. - Windmill, BI No. 17, 1980, F 03 D 3/30.

2. A.S. USSR No. 861716 / I.P. Kopylov et al. - Gearless wind turbine, BI No. 11, 1981, F 03 D 1/00.

3. RF patent No. 2204734 / A. M. Litvinenko - Stator of a wind generator, publ. BI No. 14, dated May 20, 2003, call No. 2001129417/06 dated October 31, 2001, MKI ⁷ F 03 D 9/00.

Claims (1)

The stator of the wind generator containing magnetic circuits, an excitation system, coupling elements and a winding, characterized in that the stator is made in the form of two pairs of U-shaped magnetic circuits, the upper pair of magnetic cores being oriented with jumpers down, an excitation system is installed between adjacent racks, the lower pair is oriented with jumpers up and covered by a coil, which is located between adjacent racks.

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