RU2245458C1 - Wind-powered generator - Google Patents

Abstract

FIELD: wind-power engineering; electrical energy generation.

SUBSTANCE: proposed wind-powered generator has tower with adjustable windwheels, windward positioning device, wound rotors and stators; rotors are made in the form of concavo-concave aerodynamic disks mounted on ends of blades; stator has pole shoes whose ends are coupled with rotors. Windwheels are mounted on shafts of convertible electrical machines incorporating stator excitation system and rotor inductor; inductor coils are connected to rectifiers mounted on windwheel blades; rectifier outputs are connected to field coils installed in rotor disks.

EFFECT: enhanced specific load, reduced starting torque, facilitated acceleration to rated speed.

1 cl, 3 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.

Closest to the claimed invention is a wind generator containing a tower with rotary 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 attached to the ends of the blades, and the stator contains pole tips, the ends of which magnetically connected with the rotors [2], the set of essential features adopted as the closest analogue (prototype) of the invention.

The disadvantage of this device is mainly the inductor design, which increases the overall dimensions. If you apply the installation of permanent magnets on the rotor (rotor washers), this limits the power of the installation, in addition, with weak winds, sticking of the rotor washer at the poles is possible, which increases the starting torque.

The technical result, which consists in increasing the specific load and reducing the starting torque, providing the possibility of promotion to a nominal speed, is ensured by the fact that in a wind generator containing a tower with rotary wind wheels, the device for installing in the wind, rotors and stators with windings, the rotors are made in the form aerodynamic washers, which are biconcave disks fixed at the ends of the blades, and the stator contains pole tips, the ends of which are magnetically connected to the rotors, according to the invention eniyu, propeller mounted on shafts converts electrical machines with excitation system and the stator on the rotor inductor, the inductor winding are connected to the rectifiers mounted on the blades windwheels, wherein the outputs of the rectifiers are connected to the excitation windings mounted in rotary washers.

Figure 1 shows a wind generator, with a rotor washer opposite one pair of poles; figure 2 shows a wind generator (front view); figure 3 shows the electrical diagram of a wind generator.

The wind generator has a lower pole tip 1, a coil 2 with a core, an upper pole tip 3, a magnetic field source 20 (electromagnet). The ends of the 4 poles 1 and 3 are beveled so as to provide a minimum clearance between the poles 1 and 3 and the rotor washer 5, which is a part of the spherical shell, behind which there is an electromagnet 19 (EM), fixed by a bolt 6 together with the rotor washer to the end of the blade 7 .

The wind generator also includes a tower 9 with a traverse 10, at the ends of which wind wheels 12 are mounted on the shafts of the inverted electric machines 8, which have a housing 16, permanent magnets 15, a stator 14, an inductor 13, connecting wires 17, rectifiers 18. A traverse 10 is attached steering wheel 21.

The generator operates as follows.

When the wheels 12 (blades 7) rotate in the incoming air flow, the aerodynamic plates 5 with an electromagnet 19 induce an EMF in the coil 2. The electric machine 8 operates as follows: when the wind is weak, the reversed electric machines 8 supply a weak current to the rectifiers 11, therefore, the EM 19 creates a weak magnetic field, which reduces the starting torque and allows the wind wheels (VK) to gain rated speed, while increasing the rotation speed, the VK increases the voltage supplied to the EM 19, and the magnetic field generated by the EM 19 increases, therefore, increases the generation of electricity.

The technical and economic advantages of the claimed device include the possibility of using with a larger unit of power than the prototype, through the use of a two-stage excitation system. At the same time, in all two stages, contactless removal of the excitation voltage is ensured, which increases the reliability of the device, improves operating conditions and reduces the starting torque.

Sources of information

1.GB 2233715 A, 1/16/1991.

2. RF patent No. 2184267 - Wind generator / A. M. Litvinenko, application No. 2000128442/06 of 11/13/2000, publ. 06/27/2002, bull. No. 18, IPC 7 F 03 D 9/00.

Claims (1)

A wind generator comprising a tower with rotary wind wheels, a wind installation device, rotors and stators with windings, 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 tips, the ends of which are magnetically connected to the rotors, different the fact that the wind wheels are installed on the shafts of the reversed electric machines with the excitation system on the stator and the inductor on the rotor, while the inductor windings are connected to rectifiers, installed m on the blades of a wind wheel, and the outputs of the rectifiers are connected to the field windings installed in the rotor washers.

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