RU2559028C1 - Slow-speed electric generator with permanent magnets - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: invention relates to electric engineering, in particular to low-speed high torque synchronous motor and generators with fixed rotor and rotating magnets, and can be used as wind generator, HF electric generators and in self-contained electric power installations. The slow-speed electric generator with permanent magnets contains rotor in form of two flat disks, stator is located between the rotor disks, and is made as ring connected with fixed shaft by spikes, armature winding wound on the ring-toroid, magnets with alternating poles, installed on side parts of the rotor in slots in number from 80 to 250 per each disk. The rated speed of the rotor is 30 rpm.

EFFECT: 80 to 250 alternating permanent magnets on each rotor-disk and rated speed 30 rpm ensure efficiency of the slow-speed electric generator with permanent magnets due to its improved design.

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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 with a fixed armature and rotating magnets, and can be used as wind generators, high-frequency electric generators and in stand-alone power plants.

State of the art

Closest to the invention in technical essence is an electric generator containing a stator and a rotor, as well as an anchor winding (see patent RU No. 135460, published 10.12.2013), selected as a prototype.

In the known electric generator, the number of constantly alternating magnets is in the range from 40 to 120, while the possibility of rotation of the rotor is from 50 to 60 rpm, which does not allow the use of this electric generator in various farms, agricultural enterprises on lowland plain rivers the flow rate, while to ensure the rotation of the rotor 50-60 rpm, you need a step-up gearbox, which complicates and increases the cost of the electric generator. Electricity supply to consumers due to the remoteness from the power system and low power is expensive. The large length and branching of power lines, the wear of electric networks cause significant losses of electricity. As a result, there is an increase in the cost of electricity supply, which generally reduces the efficiency of production at enterprises and worsens the conditions for comfortable living of the population. Under the conditions of the Federal Law of the Russian Federation No. 261-ФЗ dated 11/23/2009 “On energy saving and on improving energy efficiency and on amending certain legislative acts of the Russian Federation”, it is proposed to increase the efficiency of electricity supply. One of the ways is the development of distributed generation, which is low-power power plants using local energy resources, which can reduce losses, and hence the cost of electricity transmission.

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 power, increasing EMF, reducing speed and nominal speed, as well as reducing the electromagnetic moment.

The technical result is ensured by the following set of features: a low-speed electric permanent magnet generator containing a rotor and a stator, as well as an anchor winding, while the rotor is made in the form of two flat disks, the stator is placed between the rotor disks and made in the form of a ring connected to spokes by a fixed shaft and the anchor winding is made toroidal, wound on a ring, characterized in that it contains from 80 to 250 alternating permanent magnets on each rotor disk and has a nominal rotational frequency Ia rotor 30 revolutions per minute.

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

An increase in power, an increase in EMF, a decrease in revolutions and nominal speed, as well as a decrease in the electromagnetic moment lead to an increase in the generator efficiency.

Brief Description of the Drawings

In FIG. 1 shows a low-speed electric permanent magnet generator (side view); in FIG. 2, section AA in FIG. one; in FIG. 3 section BB in FIG. one.

The implementation of the invention

The invention can be implemented as follows.

In a low-speed permanent magnet electric generator containing a rotor and a stator, as well as an anchor winding, the rotor is made in the form of two flat disks, the stator is placed between the rotor disks and made in the form of a ring connected to the fixed shaft by spokes, and the anchor winding is made toroidal, wound on the ring, while it contains from 80 to 250 alternating permanent magnets on each rotor disk, and is made with the possibility of a nominal rotor speed of 30 revolutions per minute.

Thus, the purpose of the invention — its use as a low-speed permanent magnet electric generator — is 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 80 to 250 alternating permanent magnets on each rotor disk and the possibility of a nominal rotor speed of 30 revolutions per minute will provide an increase in power, an increase in EMF, a decrease in revolutions and rated speed, as well as a decrease in electromagnetic moment.

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

Description of the design of the device:

In a low-speed permanent magnet electric generator containing a rotor 1 and a stator 2, as well as an anchor winding 3, the rotor 1 is made in the form of two flat disks, the stator 2 is placed between the disks of the rotor 1 and made in the form of a ring connected to a fixed shaft 4 by spokes, and the anchor winding 3 is made toroidal, wound on a ring, magnets 5 with alternating poles are mounted on the side of the rotor 1 in the grooves.

Slow-moving electric permanent magnet generator operates as follows.

When two rotor disks 1 of the generator rotate, the lines of force of the permanent magnet fields 5 intersect the turns of the segment anchor winding 3 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 1.

Thus, the proposed low-speed electric permanent magnet generator, in contrast to the prototype, increases efficiency.

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

Claims (1)

A low-speed permanent magnet electric generator containing a rotor and a stator, as well as an anchor winding, the rotor is made in the form of two flat disks, the stator is placed between the rotor disks and made in the form of a ring connected to the fixed shaft by spokes, and the anchor winding is made toroidal, wound on a ring, characterized in that it contains from 80 to 250 alternating permanent magnets on each rotor disk and has a nominal rotor speed of 30 rpm.

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