WO2007018453A2

WO2007018453A2 - Rotor for a magnetoelectrical machine, mainly a synchronous generator excitable by permanent magnets

Info

Publication number: WO2007018453A2
Application number: PCT/RU2006/000383
Authority: WO
Inventors: Leonid Wiktorowich Folimonow; Igor Wiktorowich Suworow
Original assignee: Obshshestwo S Ogranichennoi Otwetstwennostiyoo Nauchno-Proizwodstwennaya Firma 'osobye Swarochnye Agregaty' (Ooo Npf 'osa')
Priority date: 2005-08-05
Filing date: 2006-07-18
Publication date: 2007-02-15
Also published as: WO2007018453A3; RU2308139C2; DE202006020832U1; RU2005124958A; DE112006002084T5

Abstract

The invention relates to electrotechnical engineering, in particular to rotors for magnetoelectrical machines, mainly to synchronous generators excitable by permanent magnets. The inventive rotor for a magnetoelectrical machine comprises the magnetic circuit annular casing (2) which is rigidly fastened to a bearing shaft (1) and is provided with a thrust flange (3). An annular magnetic insert formed by exciting permanent magnets is mounted on the sidewall (4) of the annular casing (2).The internal sidewall of the annular casing (2) is provided with an annular groove (a). The annular magnetic insert consists of a group of similar solid state ring magnets (5) whose magnetic poles alternate in a circular direction and which are arranged in said annular groove (a). The analogous alternating in the circular direction magnetic poles are positioned in the adjacent solid state ring magnets (5) in such a way that they are congruent to each other on the same radial planes. Said invention makes it possible to increase the operation reliability of the magnetoelectrical machine rotor and to extend the performance characteristics thereof by increasing a general magnetic flow produced by the rotation thereof and to improve the mass-dimensional characteristics of the rotor.

Description

The rotor of a magnetoelectric machine, mainly synchronous

permanent magnet excitation generator

The invention relates to the field of electrical engineering, in particular

to rotors of magnetoelectric machines, mainly synchronous

generators with permanent magnet excitation, and maybe

used as part of various sources of electricity with

magnetoelectric generators, for example, as part of a synchronous

Permanent Magnet Generator in cars

boats, as well as in autonomous power plants as part of

magnetoelectric machines (synchronous generators with excitation

from permanent magnets) to supply electricity to various

consumers (for lighting, actuating a diverse

power tools), as well as for various

technological processes, for example, for conducting an electric arc

welding.

Known rotor of a magnetoelectric machine, mainly

permanent magnet excitation from permanent magnets,

containing a clip fixed to the support shaft

magnetic circuit on which permanent magnets are mounted

excitations with alternating in the circumferential direction magnetic

poles (see, for example, RF patent JVfe 2178615, CL H02K 1/27 on the application of JUGs

2000120729/09 from 08/02/2000). A disadvantage of the known rotor of a magnetoelectric machine is

large metal consumption and significant dimensions due to

significant metal consumption and massive dimensions

a cylindrical shape of a holder of a magnetic circuit made of two

separate, axially separated from each other

identical sections with separate constants

field magnets magnetized in the radial direction

facing their adjacent poles of the same name in

diametrically opposite direction and shifted in circumferential

direction in adjacent sections with its poles 180

electrical degrees relative to each other. To additional

a disadvantage of the known rotor of a magnetoelectric machine follows

attribute technological complexity due to requirement

the implementation of special radial grooves in the holder of the magnetic circuit

for placement of individual magnets in them for the purpose of their reliable

retention in the cage against loss during rotation with a large angular

the rotor speed of the magnetoelectric machine, as well as

due to the presence of a special non-magnetic insert between

sections of the cage of the magnetic circuit separating the latter from

friend in axial direction.

Also known is the rotor of a magnetoelectric machine, mainly

permanent magnet excitation from permanent magnets,

SUBSTITUTE SHEET (RULE 26) containing an annular ferrule fixed to a support shaft

magnetic circuit, on the inner side wall of which is mounted

permanent magnet liner

excitations with alternating in the circumferential direction magnetic

poles (see, for example, RF patent JVb 2141716, class H02K 21/12 on request

J \ f ° 4831043/09 dated 03/02/1988).

A disadvantage of the known rotor of a magnetoelectric machine is

low reliability in operation due to technological

the complexity of the design of a composite annular liner with individual

permanent magnets having a variable in radial

direction width and separated by magnetic circuits

areas, as well as due to low reliability of fastening

individual permanent magnets to the inner side wall of the annular

rotor cages (use forming a rotor annular cage

diamagnetic plastic ring spacer and retaining ring,

perceiving radially directed and very significant

centrifugal forces during rotation of the annular magnetic liner with

separate permanent magnets). Additional disadvantage

famous magnetoelectric machine rotor is narrow

low performance

magnetic flux generated by the rotation of the ring cage

SUBSTITUTE SHEET (RULE 26) rotor magnetic circuit (due to the small width of the annular

magnetic liner formed from individual constants

magnets, and the heterogeneity of the magnetization poles of constants

magnets).

The closest analogue (prototype) is the rotor

magnetoelectric machine, mainly synchronous

a permanent magnet excited generator comprising

ring ring fixed to the support shaft

magnetic circuit with a persistent flange on the inner side wall

which mounted permanent excitation magnets, forming

with each other an annular magnetic insert with alternating

circumferential direction with magnetic poles (see, for example, RF patent N °

2069441, cl. H02K 21/22 according to the application N ° 4894702/07 of 06/01/1990)

A disadvantage of the known rotor of a magnetoelectric machine is

low reliability due to low reliability

fastenings of individual permanent magnets, forming among themselves

ring magnetic insert, to the inner side wall

annular ring of the rotor (stress distribution in the area

pairing the annular magnetic liner with the inner side

the wall of the annular holder of the magnetic circuit is extremely

uneven, with jumps and sharp changes in the plot

stresses). An additional disadvantage of the known rotor

SUBSTITUTE SHEET (RULE 26) magnetoelectric machine is a narrow operational

parameters due to how small the value created when

rotor rotation by magnetic flux (due to use

rather narrow annular magnetic liner, given

heterogeneity of magnetization of magnetic poles and additional

edge effect of attenuation of magnetic induction), and

technological complexity of the implementation of significant width

annular magnetic liner formed by individual

permanent magnets (the requirement for special

predominantly unique in composition, installations for

magnetization of multipolar ring magnets). Small is

magnitude of the magnetic flux generated by the annular magnetic circuit

rotor leads, as a result, to a small active power

synchronous generator, which uses this rotor

magnetoelectric machine.

The aim of the present invention is to increase reliability in

operation of the rotor of a magnetoelectric machine and its expansion

operational parameters.

This goal is achieved by the fact that the magnetoelectric rotor

machines, mainly a synchronous generator with excitation from

permanent magnets containing rigidly bonded to a supporting

a shaft an annular ferrule of a magnetic circuit with a persistent flange, on

SUBSTITUTE SHEET (RULE 26) the inner side wall of which is mounted an annular magnetic

insert formed by permanent excitation magnets with

alternating in the circumferential direction of the magnetic poles in it

the inner side wall of the annular holder of the magnetic circuit is made

with an annular groove, and the specified annular magnetic liner

made of a group of identical monolithic ring magnets with

alternating circumferentially magnetic poles,

placed in said annular groove on the inner side

the wall of the annular holder of the magnetic circuit and interconnected

at its ends and with the side wall of the specified annular groove,

while alternating with the same name in the circumferential direction

magnetic poles in adjacent monolithic ring magnets

located congruently to each other in the same radial planes.

An additional difference of the proposed magnetoelectric rotor

machines, mainly a synchronous generator with excitation from

permanent magnets, is that each of the monolithic

ring magnets made in the form of a circular hollow cylinder of

magnetoanisotropic powder material.

In addition, the interface sections of monolithic ring magnets

between themselves and with the side wall of said annular groove in

the inner side wall of the annular holder of the magnetic circuit provided

adhesive filling them.

SUBSTITUTE SHEET (RULE 26) The invention is illustrated in the drawing.

In FIG. 1 - shows a General view of the proposed rotor

magnetoelectric machine, mainly synchronous

generator with permanent magnet excitation, in longitudinal

cutaway;

In FIG. 2 - section A - A of FIG. one.

The rotor of a magnetoelectric machine, mainly synchronous

generator with excitation from permanent magnets, contains (see Fig.

1 and FIG. 2) annular clip rigidly fastened to the support shaft 1

2 magnetic cores with a persistent flange 3, on an internal side wall

4 which is mounted an annular magnetic insert formed

alternating permanent magnets with alternating

direction by magnetic poles (S - N). Inner side wall

4 ring holders 2 magnetic cores made with ring

a groove "a", and the specified annular magnetic insert is made of

groups of identical monolithic ring magnets 5 s

alternating in the circumferential direction of the magnetic poles (S - N),

placed in said annular groove "a" on the inner

the side wall 4 of the annular ferrule 2 and paired with each other along

their ends "6" and with the side wall of the specified annular groove

"A". Alternating in the same direction magnetic

poles (S - N) in adjacent monolithic ring magnets 5

SUBSTITUTE SHEET (RULE 26) located congruently to each other in the same radial planes.

Each of the monolithic ring magnets 5 is made in the form

circular hollow cylinder made of magnetoanisotropic powder

material. Monolithic ring magnet 5 mating portions

between themselves and with the side wall of said annular groove "a"

in the inner side wall 4 of the annular holder 2 of the magnetic circuit

equipped with (in the embodiment) adhesive filling them

(not shown in the drawing). To transmit torque ring

the holder 2 of the magnetic circuit is fastened to the support shaft 1 by

keyway with key 6, placed in the corresponding

a groove made in the support shaft 1.

The rotor of a magnetoelectric machine, mainly synchronous

a generator with excitation from permanent magnets, is collected and

operated as follows. Each of the monolithic

ring magnets 5 of a magneto-anisotropic powder material,

located in the auxiliary technological ring (in the drawing

not shown) and magnetized to the given parameters (by number

poles and the magnitude of the coercive force on the magnetization of the material

monolithic ring magnet) together with the specified auxiliary

technological ring in a special inductor installation for

magnetization of ring magnets (also not shown in the drawing)

after the end of the magnetization process, it is pressed out

SUBSTITUTE SHEET (RULE 26) # IhI lV HW / I -W

9 auxiliary technological ring and is pressed into

annular ferrule 2 of the magnetic circuit (into the annular groove "a" in

inner side wall 4 of the annular holder 2) to the corresponding

emphasis. Next, the process repeats and the next magnetized in

monolithic special inductor

ring magnet 5 from a magnetoanisotropic powder material

pressed out of the auxiliary technological ring and

it is pressed into the annular ferrule 2 of the magnetic circuit (into the annular

the groove “a” in the inner side wall 4 of the annular holder 2) to

stop in the previous monolithic ring magnet 5 (until it stops in its

end face "6"), after which the process is repeated again until it forms (or

set) in an annular holder 2 magnetic circuit (in an annular groove

"A" in the inner side wall 4) of a continuous annular magnetic

liner (package) of monolithic ring magnets 5, in which

alternating in the same direction magnetic

poles (S - N) in adjacent monolithic ring magnets

located congruently to each other in the same radial planes.

To increase the strength and reliability of mounting monolithic

ring magnets 5 in the annular groove "a" in the inner side

the wall 4 of the annular holder 2 (in the embodiment of the rotor

magnetoelectric machine) monolithic interface sections

ring magnets 5 between themselves and with the side wall of the aforementioned

SUBSTITUTE SHEET (RULE 26) annular groove "a" in the inner side wall 4 of the annular

magnetic core clips are equipped with adhesive filling them

(why before pressing in monolithic ring magnets 5 in

annular ferrule 2 of the magnetic circuit these monolithic annular

magnets 5 and the side wall of the annular groove "a" in the side wall

4 annular clips are lubricated with the appropriate adhesive, -

not shown in the drawing).

The execution of the ring magnetic liner from the same group

monolithic ring magnets 5 with alternating in circumferential

direction of the magnetic poles placed in said

annular groove "a" made in the inner side wall 4

annular ferrule 2 of the magnetic circuit, causes an increase

reliability in operation of the rotor of the magnetoelectric machine,

since monolithic ring magnets 5 have a very large

margin of mechanical strength (significant centrifugal forces,

acting on a composite annular magnetic liner with

permanent magnets and tending to deform it or

break, do not cause in him such stresses that would

exceeded its ultimate strength), and in the distribution itself

voltages at the interface of monolithic ring magnets 5

and the side wall of the annular groove "a" in the inner side

the wall 4 of the annular holder 2 of the magnetic circuit are missing any

SUBSTITUTE SHEET (RULE 26) jumps and sudden changes (in the diagram of stresses). Additional

advantage of the proposed rotor of the magnetoelectric machine

is the expansion of its operational parameters, due to

the fact that a very significant in width circular magnetic

the insert is made (typed) from a group of relatively narrow

identical monolithic ring magnets 5, which allows you to change

over a wide range the total magnetic flux (depending on

the required active power of the magnetoelectric machine,

predominantly synchronous generator, in which

the proposed rotor is used), improve and expand the area

uniformity of the generated magnetic field and increase it

tension, and also allows, as a consequence, directly

increase the electrical active power of the magnetoelectric

generator with improved weight and size characteristics as

the rotor itself and the generator, and additionally reduces

operating costs for the manufacture of the proposed rotor

magnetoelectric machine through the use of for

magnetization of monolithic ring magnets 5 conventional inductors

in magnetization installations not specifically specified

unique parameters (for example, according to the value of the required pulse

current providing the necessary value of tension

magnetic field in the inductor of a magnetization installation, according to

SUBSTITUTE SHEET (RULE 26) heat transfer parameters of a special cooling system

current leads and discharge circuits needed to drain very

significant heat fluxes arising in current leads and

discharge circuits during magnetization).

SUBSTITUTE SHEET (RULE 26)

Claims

Claim

1. The rotor of a magnetoelectric machine, mainly synchronous

a permanent magnet excited generator comprising

annular ferrule rigidly fastened to the support shaft

magnetic circuit with a persistent flange on the inner side wall

which mounted an annular magnetic liner formed by

alternating permanent magnets with alternating

direction of the magnetic poles, characterized in that the inner

the side wall of the annular holder of the magnetic circuit is made with

annular groove, and the specified annular magnetic liner

made of a group of identical monolithic ring magnets with

alternating circumferentially magnetic poles,

placed in said annular groove on the inner side

the wall of the annular holder of the magnetic circuit and interconnected

at its ends and with the side wall of the specified annular groove,

while alternating with the same name in the circumferential direction

magnetic poles in adjacent monolithic ring magnets

located congruently to each other in the same radial planes.

2. The rotor of a magnetoelectric machine, mainly synchronous

generator with excitation from permanent magnets according to claim 1,

characterized in that each of the monolithic ring magnets

SUBSTITUTE SHEET (RULE 26) made in the form of a circular hollow powder cylinder

magnetoanisotropic material.

3. The rotor of a magnetoelectric machine, mainly synchronous

generator with permanent magnet excitation under item I ₅

characterized in that the sections of the interface monolithic ring

magnets between each other and with the side wall of the said annular

grooves in the inner side wall of the annular ring

magnetic cores are provided with adhesive composition filling them.

SUBSTITUTE SHEET (RULE 26)