UA116122U - LOW-POWER WIND ELECTRIC GENERATOR WITH DUAL SIMPLE TWO-DISC ROTOR - Google Patents

Abstract

The low-power wind turbine with a double double-disc rotor of simplified design contains a coaxially located double-disc rotor with a steel magnetic circuit connected to the output shaft of the wind turbine, and a disk stator with anchor coils without a core. alternating poles, and the stator with anchor coils without a core is located with an air gap between the rotor disks. The second rotor disk is made in the form of a steel plate.

Description

The useful model belongs to wind power and can be used to convert the kinetic energy of the wind into electrical energy in home wind power plants.

It is known that multipole generators with permanent magnets are the most common in small wind turbines (Chop Gm/ideii apa Topu MU/vyi. Nepezhabrie Epegdu Nezoipgsev. - | opdop apa

Mem MoiKk: Tauiog 5 Egapsib5, 2006. - R. 310-314|Y. However, conventional auto-tractor generators do not meet the requirements of wind turbines.

The well-known gearless wind unit |Pat. BOTH Mo. 3740565, cl. 290-55, publ. 19731), containing a horizontally installed magnetoelectric generator with a segmented rotor and a circular stator.

The disadvantage of the named wind unit is its complexity and bulkiness, which requires a large amount of construction and installation work.

A wind heat generator with self-excitation is also known (Pat. NA Mo 64568. IPC

EO307/06. - Publ. 16.02.2004, Vyul. Mo 21, which contains an induction wind energy-to-heat converter (IPEVT) in the form of disc magnetic conductors with a toothed structure of adjacent surfaces, installed coaxially with a gap between them, and an excitation winding located in an annular groove on the stator, the rotor is kinematically connected to the wind motor shaft , additional armature windings of an identical design are located in a staggered order symmetrically on the stator teeth, connected in parallel and connected to the excitation winding through an adjustable rectifier.

The disadvantage of the known device is the low electrical efficiency due to overheating of the armature windings due to their location on the teeth of the steel magnetic conductor, and the dependence of the generated EMF on the final magnetization of the teeth, which makes it difficult to use the device for year-round operation.

The homestead cogeneration wind farm is also known (Pat. Sha Mo 95186, IPC RgO303/06,

EO309/00. - Publ. 10.12.2014, Bull. Mo 23), which contains several wind thermal installations with

IPEVTs, connected kinematically to the shaft of their wind engine, and at least one autonomous wind generator to power the excitation windings of each IPEVT.

The shortcoming of the on-site cogeneration wind farm is the lack of a low-power wind generator to power the excitation windings of each IPEVT.

A gearless low-power wind generator, taken as a prototype, is also known

Co., Ltd.) IPat. SA Mo 104467. IPC RO307/06 (2006.01), ROZO 1/06 (2006.01). - Publ. 10.02.2016, Bull. Mo 3), containing a multi-pole two-disc steel rotor, with permanent magnets fixed evenly around the periphery of the discs, opposite poles mirrored to each other, connected to the output shaft of the wind engine, and a disc stator with armature coils without a core, located with an air gap between the discs of the multipole rotor. The stator is made in the form of flat trapezoidal armature coils symmetrically located along the inner perimeter, connected in series and filled with compound.

The disadvantage of the device, taken as a prototype, is the complexity of the design of the two-disk rotor and the high cost, due to the high cost of a large number of neodymium magnets.

The basis of a useful model is the task of creating such a wind generator, in which a new implementation of structural elements and their mutual arrangement would allow for simplification and cheaper construction, increase in reliability.

The task is solved by the fact that a low-power wind generator with a double two-disk rotor of a simplified design contains a coaxially located two-disk rotor with a steel magnet wire, connected to the output pole of the wind engine, and a disk stator with armature coils without a core, the first disk of the rotor is made of multipoles with uniformly fixed around the circle on the periphery of the disk with permanent magnets with alternating poles, and the stator with armature coils is located with an air gap between the rotor disks, according to a useful model, the second rotor disk is made in the form of a steel plate.

According to a useful model, the stator is made in the form of a plastic disk, for example, Bakelite, with flat trapezoidal anchor coils located along the inner perimeter, filled with a compound, the coils are connected in series.

According to the utility model, neodymium magnets are used.

Making the rotor multi-pole ensures an increase in the frequency of the generated EMF, that is, without a multiplier. Uniform fixing around the periphery of the first rotor disk of permanent magnets ensures reliable excitation of the magnetic field and stability of the frequency of the generated EMF in the armature windings. The execution of the second rotor disk in the form of a steel plate provides a simplification of the design, a reduction in the number of magnets, dimensions and cost of the design. Making the stator disk plastic eliminates losses due to the heating of the disk, because it reduces the moment of displacement, which expands the range of the working speed of the wind. The location of the armature windings on the fixed stator avoids moving contacts, and therefore increases the efficiency and reliability of the generator. The execution of anchor coils without a core and a steel magnetic core provides a reduction in the generator's displacement moment, and therefore - its start-up at low wind speed. The manufacture of flat trapezoidal armature coils improves the compactness of the stator, increases the coefficient of use of the stator volume, and therefore contributes to the reduced size and weight of the generator. Connecting the armature coils in series ensures an increase in EMF in the generator windings. The use of powerful neodymium magnets helps to reduce the size and weight of the generator.

Thus, the proposed useful model provides simplification, increased reliability, and cheaper design.

The essence and principle of operation of a low-power wind generator with a double two-disc rotor of a simplified design is explained by the drawings: in Fig. 1 shows the structure of a low-power wind generator; in Fig. 2 - stator with armature windings;

A low-power wind generator with a double two-disc rotor of a simplified design consists of a body 1, which can be installed both vertically and horizontally, a shaft 2, mounted on bearings 3, which are closed on both sides by covers 4.

A two-disc rotor 5, 6 is located on the shaft 2, the second disc b is made of steel, and neodymium magnets 7 are fixed evenly around the first disc 5. Between the rotor discs 5 and b with a gap there is a stationary plastic, for example, bakelite stator 8 with flat armature coils 9 trapezoidal shape without a core. The anchor coils 9 are connected in series, installed on a plastic disc located perpendicular to the axis of the output shaft 2, and filled with compound. The ends of the windings 9 are connected to the terminal box 10.

Plastic stator 8 with armature windings 9 is rigidly fixed in housing 1 with pins 11.

The shaft of the electric generator 2 is connected to the output shaft 12 of the wind engine (not shown).

The device works as follows. The output shaft 12 of the wind engine, driven by the wind, transmits torque through the kinematic connection of the shaft 2, which, in turn, rotates the first rotor disk 5 fixed on it, with permanent neodymium magnets 7 fixed on it, and the second rotor steel disk 6. Since the magnets 7 are located

Zo uniformly on the periphery of the first rotor disk 5, then create a powerful magnetic flux that penetrates the flat armature coils 9 and is closed through the steel stator disks 5, 6. When the rotor disks 5, b rotate, the magnetic flux of the permanent magnets alternately penetrates the armature coils 9 and induces they have EMF. To increase the output EMF, the armature coils 9 are connected in series in windings, the ends of which are connected to the terminal box 10. This generator can be single-phase (all coils are connected in series) or three-phase (three groups of coils). The windings connected in advance according to the selected scheme (mostly in a "star") are placed in a specially prepared form on a plastic disk 8 and filled with a compound for bonding.

The main task of the developer is to determine the size of the gap and parameters of the armature winding with the available number of magnets.

Claims (2)

USEFUL MODEL FORMULA 1. A low-power wind generator with a double two-disk rotor of a simplified design, containing a coaxially located two-disk rotor with a steel magnet wire, connected to the output shaft of the wind engine, and a disk stator with armature coils without a core, the first disk of the rotor is multi-pole with uniformly fixed around the periphery disk with permanent magnets with alternating poles, and the stator with armature coils without a core is located with an air gap between the rotor disks, which differs in that the second rotor disk is made in the form of a steel plate. 2. A low-power wind generator with a double two-disk rotor of a simplified design according to claim 1, which is characterized by the fact that the stator is made in the form of a plastic disk with flat trapezoidal anchor coils located along the inner perimeter, filled with a compound, the coils are connected in series. Z. A low-power wind generator with a double two-disc rotor of a simplified design according to claim 1, which is characterized by the fact that neodymium magnets are used.