RU2532250C1 - Electric generator based on permanent magnets - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: invention relates to the area of electrical engineering. The electric generator based on permanent magnets comprises a stator (2) and rotor (3) as well as armature winding (4), the rotor (3) is made of composite material with flat-topped cross-section, which is mounted at the metal shaft (5), magnets (1) with alternating poles are installed at the rotor (3) in slots, the armature winding (4) is placed at the composite stator (2) and made as independent sections. The armature winding (4) is placed at outer composite surface of the stator (2) at minimum distance from the magnet (1) poles in direct contact with environment. Sections of the armature winding (4) with equiphases are connected in series and may contain from 40 up to 120 of alternating permanent magnets (1). Rotation rate of rotor (3) varies from 50 up 60 revolutions per minute.

EFFECT: improved cooling of the armature winding, reduced inertia at minimum use of material, reduced noise level and number of revolutions as well as rotation rate.

5 cl, 2 dwg

Description

FIELD OF THE INVENTION

The invention relates to the field of electrical engineering, in particular to low-speed high-torque synchronous motors and generators, and can be used as wind generators, high-frequency electric generators, multiphase synchronous electric motors.

State of the art

Closest to the invention in technical essence is a single-phase electric generator containing a stator and a rotor, as well as an anchor winding (see patent RU No. 2392724, published 06/20/2010), selected as a prototype.

In the well-known single-phase electric generator made of ferromagnetic material, the cooling system of the anchor winding is hindered, this is due to its location in a closed space of the inner part of the stator, and it also has a high inertness due to the large use of ferromagnetic material. In addition, as a result of significant revolutions and small diameters, noise is increased.

The disadvantage of the prototype is the low efficiency of the generator.

Disclosure of invention

The problem to which the invention is directed, is to increase the efficiency of the generator.

The technical result consists in increasing cooling of the armature winding, reducing inertia with minimal metal use, reducing noise, reducing revolutions and rotational speeds, increasing the number of magnets and low weight with large diameters.

The technical result is ensured by the following set of features: an permanent magnet electric generator containing a stator and a rotor, as well as an anchor winding, characterized in that the rotor is made of composite material with a U-shaped section mounted on a metal shaft, magnets with alternating poles are mounted on the rotor in grooves, the anchor winding is placed on the composite stator and is made in the form of independent sections, in addition:

- an electric generator, characterized in that the anchor winding is located on the outer composite surface of the stator at a minimum distance from the poles of the magnets in direct contact with the environment;

- an electric generator, characterized in that the sections of the armature winding with the same phases are connected in series;

- an electric generator, characterized in that it contains from 40 to 120 alternating permanent magnets;

- an electric generator, characterized in that it is made with the possibility of rotation of the rotor from 50 to 60 revolutions per minute.

The problem to which the invention is directed, and the technical result are interconnected as follows.

An increase in cooling of the armature winding, a decrease in inertia with minimal metal use, a decrease in noise, a decrease in revolutions and rotational speeds, an increase in the number of magnets and low weight at large diameters leads to an increase in generator efficiency.

Brief Description of the Drawings

Figure 1 shows a longitudinal section of an electric generator with permanent magnets; figure 2 is a section aa in figure 1.

The implementation of the invention

The invention can be implemented as follows.

For a permanent magnet electric generator containing a stator and a rotor, as well as an anchor winding, the rotor is made of composite material with a U-shaped section mounted on a metal shaft, magnets with alternating poles are mounted on the rotor in grooves, the anchor winding is placed on the composite stator and made in the form of independent sections, in addition:

- the anchor winding is located on the outer composite surface of the stator at a minimum distance from the poles of the magnets in direct contact with the environment;

- sections of the armature winding with the same phases are connected in series;

- contains from 40 to 120 alternating permanent magnets.

- the possibility of rotation of the rotor from 50 to 60 revolutions per minute.

Thus, the purpose of the invention - its use as an electric generator with permanent magnets - is being realized.

Information confirming the possibility of obtaining a technical result during the implementation of the invention (a causal relationship of the essential features with the specified technical result) is as follows.

The implementation of the rotor made of composite material with a U-shaped section mounted on a metal shaft, installation of constantly alternating magnet poles on the rotor in the grooves, placement of the anchor winding on the composite stator and execution as independent sections provide increased cooling of the armature winding, reduced inertia with minimal metal use, noise reduction, reduction of revolutions and rotational speeds, increase in the number of magnets and low weight with large diameters.

Therefore, the set of essential features is sufficient to achieve the technical invention provided by the invention.

Description of device design

A permanent magnet electric generator 1 containing a stator 2 and a rotor 3, as well as an anchor winding 4, the rotor 3 is made of composite material with a U-shaped section mounted on a metal shaft 5, magnets 1 with alternating poles are mounted on the rotor 3 in grooves the anchor winding 4 is placed on the composite stator 2 and is made in the form of independent sections.

A permanent magnet electric generator operates as follows.

When the rotor 3 of the generator rotates, the field lines of the fields of permanent magnets 1 intersect the turns of the anchor winding 4 located on the fixed stator 2. EMF of electromagnetic induction arises in them, the magnitude of which depends on the speed of rotation of the rotor 3.

Thus, the proposed permanent magnet electric generator, in contrast to the prototype, improves efficiency.

The effectiveness of the proposed permanent magnet electric generator is due to its improved design.

Claims (5)

1. An electric generator with permanent magnets, containing a stator and a rotor, as well as an anchor winding, characterized in that the rotor is made of composite material with a U-shaped cross-section mounted on a metal shaft, magnets with alternating poles are mounted on the rotor in grooves, the anchor winding is placed on a composite stator and made in the form of independent sections. 2. The electric generator according to claim 1, characterized in that the anchor winding is located on the outer composite surface of the stator at a minimum distance from the poles of the magnets in direct contact with the environment. 3. The electric generator according to claim 2, characterized in that the sections of the armature winding with the same phases are connected in series. 4. The electric generator according to claim 1, characterized in that it contains from 40 to 120 alternating permanent magnets. 5. The electric generator according to claim 1, characterized in that it is made with the possibility of rotation of the rotor from 50 to 60 revolutions per minute.

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