RU2239093C1 - Windmill generator - Google Patents

Abstract

FIELD: wind power engineering.

SUBSTANCE: proposed windmill generator has tower mounted on swivel base, windwheels, device for positioning with wind, as well as wound rotors and stators. Rotors are made in the form of aerodynamic disks (concavo-concave disks) secured on blade ends. Stator has pole shoes whose butt-ends are magnetically coupled with rotors. Blades are provided with additional rotors installed between center of revolution and ends of blades, additional rotors being magnetically coupled with additional crosspiece-mounted stators.

EFFECT: reduced starting torque.

1 cl, 5 dwg

Description

The invention relates to the field of wind energy and can be used to generate electricity.

Known wind generator containing a tower with rotary wind wheels, a device for installing in the wind, as well as rotors and stators with windings [1].

The disadvantage of this device is the increased mass of the rotor, which actually has a diameter equal to the diameter of the wind wheel itself, which is almost unacceptable in the case of large diameter wind wheels.

Known wind generator containing a tower with rotary wind wheels, a device for installing in the wind, rotors and stators with windings, characterized in that the rotors are made in the form of aerodynamic washers, which are biconcave disks mounted on the ends of the blades, and the stator contains pole tips, the ends of which are magnetically connected with rotors [2].

The disadvantage of this device is the large starting torque, which degrades the use of a wind generator in low-efficiency winds.

The technical result, which consists in the possibility of reducing the starting torque, is ensured by the fact that in a wind electric generator comprising a tower with a rotary traverse with wind wheels, a wind installation device, rotors and stators with windings, the rotors are made in the form of aerodynamic washers, which are biconcave disks, fixed at the ends of the blades, and the stator contains pole pieces, the ends of which are magnetically connected with the rotors, according to the invention, the blades are equipped with additional rotors, installed upon between the rotation center and the ends of the blades, and the additional rotors magnetically coupled with additional stators mounted on the traverse.

In Fig.1 shows a wind generator with additional rotors and a stator (front view), Fig.2 is the same (top view), Fig.3 shows additional rotors and stators (side view), Fig.4 shows the whole wind generator, front view, figure 5 is the same (top view).

The wind generator has a lower pole tip 1, a coil 2 with a core, a magnetic field source 3 (for example, a permanent magnet), an upper pole (upper pole tip) 4.

The ends of the 5 poles 1 and 4 are beveled so as to provide a minimum clearance between the poles 1 and 4 and the rotor washer 6, which is a part of a spherical shell attached by a bolt 7 to the end of the blade 8.

The wind generator also includes a tower 9 with a traverse 10, at the ends of which, in the bearings 11, rotary wind wheels 12 are installed, the rudder 13 of the installation orientation to the wind is attached to the traverse 10. The generator 14 with a traverse 10 is mounted on a rotary base 15.

The washers 6 are part of the sphere (i.e., have double concavity), and the ends of the tips 1 and 4 are magnetically connected to the ferromagnetic washers 6 at the moment they pass by the tips 1 and 4.

The wind generator is additionally equipped with rotors 16, magnetically connected with an additional stator 17. One of the possible versions of the stator includes magnetic cores 18, a permanent magnet 19 and a coil 20.

When the wheels 12 (blades 8) rotate in the incoming air flow, the aerodynamic plates 6 commute the magnetic flux created by the magnet 3 in the magnetic system. These flow changes are sensed by coil 2 and transmitted to the network. When the wind direction changes, the upper part of the tower 9, together with the bearings 11 and the steering wheel 13, rotates in the bearing 11 of the rotary part. At the same time, the magnetic system of the generator 14 is rotated, so that the rotors 6 are in the gap of the magnetic systems for any orientation of the wheel 12 to the wind. If necessary, to ensure operation in light winds, coil 2 is turned off, and only coil 20 is connected to the load, that is, a generator composed of a stator 17 and rotor 16. Since the distance from the axis of rotation of the generator is less than that of the generator with coil 2, this provides a smaller starting moment and possibility of the system working with winds of lower intensity.

Providing this opportunity extends the functional characteristics of the wind generator, increases energy efficiency.

With high-intensity winds, it is possible to connect coils 2 and coils 20, which increases power compared to the prototype.

Sources of information

1. GB 2233715 A, μl. F 03 D 9/00, 01/16/1991.

2. RF patent 2184267. A. M. Litvinenko, by application No. 2000128442, from 13.11.2000, publ. 11/27/2002. Bull. Number 18.

Claims (1)

A wind generator containing a tower with a rotary traverse with wind wheels, a wind installation device, rotors and stators with windings, rotors are made in the form of aerodynamic washers, which are biconcave disks mounted on the ends of the blades, and the stator contains pole tips whose ends are magnetically connected to the rotors characterized in that the blades are equipped with additional rotors installed between the center of rotation and the ends of the blades, and additional rotors are magnetically connected with additional proof operation, mounted on the traverse.

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