RU2316103C2 - Magnetic system of rotor - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: magnetic system of rotor comprises a stack of plates provided with V-shaped openings and made of magnetic circuit and permanent prismatic magnets with the tangential magnetization N-S. The magnets are set in the openings in the plate with an inclination to the radial axis and abut each other by their similar poles. The nonmagnetic inserts can underlie the magnets.

EFFECT: expanded functional capabilities.

1 cl, 2 dwg

Description

Technical field

The invention relates to the field of electrical engineering and for the structural design of magnetic systems of rotors of brushless magnetoelectric machines. The inventive device can be used both in engines and generators, and can improve the technical characteristics of electrical machines of these classes.

State of the art

Known magnetic system of the rotor, consisting of a package of solid disk-shaped plates with radial rectangular grooves in which tangential permanent magnets are placed (see patent GB 1263300, CL H2K 1/28, publ. 09.02.72.).

This magnetic system has a low value of the working magnetic flux, which is due to significant scattering fluxes and small radial dimensions of the magnets, limited by the radial dimension of the rotor.

The rotor magnetic system is known, consisting of a stack of disk-shaped plates with radial rectangular grooves with tangential permanent magnets placed in them, which is equipped with bursts of wedge-shaped plates arranged in an alternating order with disk-shaped plates to reduce the dispersion flux (see.c. SU 1098070, CL H2K 1/06, publ. 06/15/84).

This magnetic system, despite a decrease in the dispersion flux, has a low value of the working magnetic flux, which is due to the small radial dimensions of the magnets, limited by the radial dimension of the rotor. In addition, this magnetic system has a low manufacturability, due to the need to use for assembly of a package of welding plates or special connecting elements.

Closest to the technical nature of the claimed invention is a magnetic rotor system consisting of a package of plates of conductive steel with holes, and permanent prismatic magnets with tangential magnetization NS installed in the holes of the plates with an inclination to the radial axis so that the distance between the opposite poles of two neighboring magnets in the outer arc is less than the inner (see patent RU 2244370, CL H2K 1/06, publ. 10.01.03).

This magnetic system, in comparison with the above-described designs, allows, due to the inclined installation of magnets, either to increase the radial size of the magnets at a given radial dimension of the rotor, and therefore to increase the value of the working magnetic flux, or, while maintaining the working magnetic flux, to reduce the radial dimensions of the rotor. In addition, this design allows you to get a finished magnetic rotor system with an even number of poles in the complete absence of requirements for the magnetic properties of the material of the rotor shaft. However, with this design, significant scattering fluxes are maintained, which are closed between the magnets facing each other by the same poles through the jumper between the holes, which leads to a decrease in the working magnetic flux, and, as a result, to a decrease in the energy indices of the magnetoelectric machine.

Disclosure of invention

The problem to which the invention is directed, is to increase the energy performance of the magnetoelectric machine while maintaining the high adaptability of the rotor design.

The technical result achieved by the implementation of the claimed invention is to reduce the dispersion flux during the inclined installation of magnets and, as a consequence, to increase the working magnetic flux.

The specified technical result by the claimed invention is achieved due to the fact that in the magnetic system of the rotor, consisting of a package of plates of magnetically conductive steel with holes and permanent magnets of a prismatic shape with tangential magnetization NS, installed in the holes of the plates at an angle to the radial axis so that the distance between the opposite poles two adjacent magnets in the outer arc are smaller than in the inner one, the holes are made V-shaped, and the magnets installed in them forming the pole division They come into contact with like poles.

In the particular case of the invention, in order to further reduce the scattering fluxes, non-magnetic inserts can be installed under the magnets forming the pole division.

When conducting a search in patent and scientific and technical sources of information, no solutions were found containing the entire set of features of the independent claim, which allows us to conclude that the proposed solution meets the criterion of "novelty", and no solutions were found containing the entire set of features of the distinctive part of the independent claim inventions, which allows us to conclude that the claimed solution meets the criterion of "inventive step".

The implementation of the invention

Figure 1 - configuration of plates of magnetic steel.

Figure 2 - a fragment of the magnetic system of the rotor with magnets installed.

The rotor magnetic system consists of a package of plates 1 made of magnetically conductive steel. V-shaped holes 2 are made in the plates 1, in which the permanent magnets of the prismatic form 3 and 4 are constituted by the pole division. The number of V-shaped holes depends on the required number of poles of the magnetic system. Magnets 3 and 4 have a tangential magnetization N-S and are in contact with the same poles. In the center of the plates 1, a circular hole 5 is made, through which the rotor shaft passes. To connect the package to the rotor shaft and transmit torque, the plates 1 have a protrusion 6. Under the magnets forming the pole division, non-magnetic inserts 7 are placed.

Due to the V-shaped shape of the holes 2, the magnets 3 and 4 are located at an angle to the radial axis. As in the known magnetic system, this allows either to increase the working magnetic flux, for a given radial dimension of the rotor (by increasing the radial size of the magnets), or while maintaining the working magnetic flux, to reduce the radial dimensions of the rotor, and also allows to obtain a finished magnetic rotor system with an even the number of poles in the complete absence of requirements for the magnetic properties of the material of the rotor shaft. Due to the fact that the magnets forming the pole division are in contact with the same poles, the scattering fluxes are reduced and the working magnetic flux is increased. An additional reduction in dispersion fluxes is achieved by installing non-magnetic inserts under the magnets forming the pole division, which significantly increases the energy performance of the magnetoelectric machine.

The proposal meets the criterion of "industrial applicability", because it can be implemented using known means and methods.

Claims (2)

1. The rotor magnetic system, consisting of a package of plates of magnetically conductive steel with holes, and permanent prismatic magnets with tangential magnetization NS, installed in the holes of the plates at an angle to the radial axis so that the distance between the opposite poles of two adjacent magnets in the outer arc is less, than internal, characterized in that the holes are made V-shaped, and the magnets installed in them, forming the pole division, are in contact with the same poles. 2. The rotor magnetic system according to claim 1, characterized in that non-magnetic inserts are installed under the magnets forming the pole division.

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