SU1539914A1 - Contactless electric machine of end-face type - Google Patents

Abstract

The invention relates to contactless torque electric machines. The purpose of the invention is to increase the specific moment of the machine. A second excitation winding 3, made in the form of a coil located in a U-shaped ring magnetic circuit 2, fixed between the outer side of the stator and the inner side of the non-magnetic case 1, is additionally introduced into the machine, and the rotor disks are made with gear with alternating polarity. The teeth of the outer annular magnetic cores of the left and right discs are magnetically coupled through the end gaps with the U-shaped magnetic core 2 of the external winding 3 of the excitation and are displaced between themselves by half the distance between the unipolar teeth of the same disc, and the teeth of the inner circular magnetic cores of the left and right discs are rigidly interconnected through a magnet by a soft sleeve, the teeth of the outer and inner ring magnetic cores of one disk (left and right) have opposite polarity, the teeth of different disks (right and on the left) of one polarity are present against one another. The teeth of one side of the rotor disk and one polarity are rigidly interconnected by ring magnetic cores, the teeth of the inner ring magnetic cores of the left and right discs are rigidly fixed on the shaft 12 of the machine, the teeth belonging to the outer and inner ring magnetic cores of each disc are fastened mechanically through non-magnetic a rim 20 providing rigid mechanical connection of the rotor disks with the shaft 12 of the machine. 4 il.

Description

(L

with

Sl oo

with

CD

the magnetic connection through the end gaps with the U-shaped magnetic core 2 of the external excitation winding 3 is displaced between themselves by half the distance between the unipolar teeth of one disk, and the teeth of the internal circular magnetic cores of the left and right disks are rigidly interconnected through a magnetic soft a sleeve, the teeth of the outer and inner ring magnetic circuits of one disk (left and right) have opposite polarity, the teeth of different disks (right and left) of one polarity

The invention relates to electrical engineering, in particular to contactless torque electric machines, widely used in electromechanical and automatic control systems.

The purpose of the invention is to increase the specific moment of the machine.

FIG. 1 shows the proposed machine, a longitudinal section; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section of B-b in FIG. 1; in fig. 4 — A sweep of the machine’s magnetic system with magnetic sweep paths.

The proposed machine contains a non-magnetic housing 1, a magnetic core 2 of the external excitation winding (U-shaped), an external winding 3 of excitation (-cushion type), a winding k core (ring type), a toroidal magnetic core 5 of the stator, a nonmagnetic rim 6 of the left rotor disk , tooth 7 of the outer annular magnetic circuit of the right rotor disk, internal excitation winding (coil type), stop ring 9, bearing assembly 1Q, key 11, non-magnetic shaft 12, internal annular magnetic wire 13 of the right rotor disk, outer ring the second magnetic circuit 1A of the right rotor disk, the right bearing shield 15 (non-magnetic), the outer annular magnetic tape recorder 16 of the left rotor disk, the prong 17 of the internal annular magnetic core of the left rotor disk, the internal annular magnetic circuit 18 of the left rotor disk, left under the horn shield 19 (non-magnetic), non-magnetic rim 2U right disc rotoi

dc one against the other. The teeth of one side of the rotor disk and one polarity are rigidly interconnected by ring magnetic cores, the teeth of the inner ring magnetic cores of the left and right discs are rigidly fixed on the shaft 12 of the machine, the teeth belonging to the outer and inner ring magnetic cores of each disc are fastened mechanically through non-magnetic a rim 20 providing rigid mechanical connection of the rotor disks with the shaft 12 of the machine. k il.

25

thirty

-35

40

45

50

ra, teeth 21 of the inner annular magnetic circuit of the right rotor disk, prong 22 of the outer annular magnetic circuit of the left rotor disk.

On the non-magnetic shaft 12 on the key 11, the left rotor disk is fastened, which includes a non-magnetic rim 20 in which the inner 18 and outer 16 ring magnetic cores with teeth and 22 are fixed (pressed in) and 22, respectively. The left disc is fixed to the shaft with a retaining ring 9.

The left bearing shield 13 is installed with a bearing assembly 10. The stator consists of a toroidal magnetic core 5 and a winding core. On the inside of the assembled stator, the coil-type excitation winding 8 is fixed (on glue), and on the outside of the stator the excitation winding 3 with U-shaped magnetic core 2 is fixed, which allows the assembled stator with excitation windings to be fixed in the non-magnetic case 1.

The assembled stator with the housing is fixed by mounting on the left bearing shield 19 and fixed on it. Similarly, the left disk is assembled with a right disk consisting of a non-magnetic rim 6 with internal 13 and external 1 magnetic conductors with teeth 21 and 7, respectively, fixed in it. The assembled right disc is put on the shaft up to the stop with the left disc and fixed with a retaining ring 9.

The position of the teeth of the opposite discs is determined by the displacement of the keyways must be strictly controlled, and their symmetries and size are determined by the tolerances on the axial dimensions of the discs of the rotor and stator. After proper installation of the rotor discs of the OT-JQ th and the stator carrier, the right bearing shield 15 with the bearing assembly 10 is attached to the housing 1.

The proposed machine works as follows.15

The excitation winding 8 (Fig. 1 -) creates an axially directed magnetic flux Φ passing through the internal axis.

There are grooves in the right and left disks (Fig. 3 and k and then through the half magnetic distance between the teeth between the annular magnetic core 16 of the left disk polarity of the disk (Fig. 1 and 2). The rotor and the end gap fall into end air (working) with a U-shaped magnetic core 2, where it closes around the external winding 3 of the excitation

The paths of the magnetic flux are similar for all other pairs of teeth of the intraresternal annular magnetowires of the right and left disks of the roto.). The described magnetic flux paths of the proposed machine are shown schematically in FIG. t.

Obviously, under the teeth of the inner and outer magnetic cores of the left and right rotor discs (17 and /, 21 and 22) the magnetic fluxes are maximum, with the annular magnetic cores of the left and in areas where there are no teeth, 18 and right 13 rotor discs and then OQ currents are minimal. Due to the shift, the tooth is included in the teeth G / of the inner annular magnetic circuit of the left disk. The passage through the winding k core, the magnetic flux enters the toroidal magnetic core 5 of the stator, 25 stator nitropholes B pass, and the coils around the magnetic core 5 and through the coils k core of each section of the machine, the space occupied by the other side of the winding k core on the teeth 21 of the inner ring magnetic circuit

right disc of the rotor, closed around X; FIG. 0, that when the internal excitation winding 8 is injected into the core, for example, the coils A and X are turned on through the internal annular magnetic circuit 31 of the right rotor disk.

The teeth 7 of the outer annular magnetic circuit of the right rotor disk are excited through the face (non-magnetic) gap of the external excitation winding 3 through the U-shaped magnetic conductor 2, and the polarity of the teeth 17 of the internal annular magnetic core of the le-40 gives the double electromagnetic disk coincides with the polarity of the opposite teeth 7 of the outer annular kagnitoprovod of the right discs of the inner and outer annular magnetic cores of the left and right rotor discs the flow has a tangential component inside the torus ideal maghod ts in zones of oppositely directed flows (for example, the side L of the coil core A and the side a of the coil

leads to the creation of a unidirectional (double) electromagnetic moment.

Similarly, it is fluxed through another excitation winding, for example, the side a of the coil A and the side L of the coil of a core X, when counter-energized, these coils also

All this leads to the formation of an electromagnetic moment twice as large as that of a known machine.

ka, then the flow through the outer ring. All this leads to the formation of an electromagnetic moment twice as large as that of a known machine.

The path of the main magnetic flux is shown by the dotted line in FIG. 1-, which shows that both end sides of the same winding coil k core (for example, coil A) are located on the front magnetic circuit 1 of the right rotor disk 45 and hits the teeth 7 of the external annular magnetic circuit of this disk and through the end air gap and space, occupied by a winding, kcor enters a toroidal magnetopro-5o with under one and the same pole (for example, stator 3, passes along a part of Mer, N), which leads to the formation of a magnetic conductor 5 in the same direction as the magnetic flux from internal winding 8 excitation (flows

folded). Further, the flow through the 5g of the electromechanical efficiency of the A core and the end air conversion is twice as high, the gap falls into the prong 22, since both end disc of the left disk are involved in the formation of the electromagnetic polarity of the external annular moment. rotor side coil winding core, then

electromagnetic moment in both axial sides of the winding of the core (sides, a, b, fig. 5), i.e. In this case, it is obvious that under the teeth of the inner and outer magnetic cores of the left and right rotor disks (17 and /, 21 and 22) the magnetic fluxes are maximum, and in areas where there are no teeth, the flows are minimal. Due to the shift of the dental cathode B of the stator, and the coils of the winding k cor of each section of the machine

The internal and external annular magnetic cores of the left and right rotor discs have a tangential component inside the toroidal magNo obvious that under the teeth of the internal and external magnetic conductors of the left and right rotor discs (17 and /, 21 and 22) magnetic fluxes are maximum, and in areas where no teeth, minimal flow. Due to the shift of the dental cathode B of the stator, and the coils of the winding k cor of each section of the machine

goes in zones of oppositely directed flows (for example, the side L of the coil core A and the side a of the coil

core X, FIG. 0, that with in-loop switching on, for example, coils A and X

gives double electromagnetic number,

leads to the creation of a unidirectional (double) electromagnetic moment.

Similarly, it is fluxed through another excitation winding, for example, the side A of the coil A and the side L of the coil X, when the coils are turned on as well.

gives double electromagnetic number,

All this leads to the formation of an electromagnetic moment twice as large as that of a known machine.

The path of the main magnetic flux is shown by the dotted line in FIG. 1-, which shows that both end sides of the same coil of the winding k core (for example, coil A) are under the same pole (for example, N), which leads to

with under the same pole (for example, N), which leads to the formation of

The efficiency of electromechanical conversion is twice as high, since both face sides of the coil of the core winding are involved in the formation of the electromagnetic moment, then

electromagnetic moment in both axial sides of the winding of the core (sides, a, b, fig. 5), i.e. in this case

as in the known machine, the active side is only that which is opposite the rotor tooth. At the same time, despite a slight increase in the volume and weight of the bed (no more than 15%), there is a significant increase in the specific moment (not less than 1, fj times),

The application of the proposed technical solution allows, besides / additionally, increasing the reliability of the machine due to the fact that its working capacity is maintained even in the event of a malfunction (breakage of turns) in one of the excitation windings,; at the same time, there is only a decrease in the main flow and a decrease in useful time by 2 times, i.e. the rigidity of the mechanical characteristic of the machine is halved.

The comparative simplicity of the assembly of the machine is ensured by the independent assembly of three main large assemblies: two rotor disks with bearing shields and a stator connected to each other through the housing and the shaft.

The field windings are made in the form of coils, which ensures the technological simplicity of their execution and assembly with other structural elements (stator and housing).

In addition to these advantages, the proposed design scheme allows the implementation of multi-module machine options (when the number of stators is more than one) with a small number of parts of the same type. The presence of a large winding space occupied by the field winding allows it to be partitioned (for example, into three coils on each side), which expands the possibilities of using machines (allows them to be used in modes of valve engines powered from a three-phase network via cycloconver- ( torus with sequentially connected excitation windings and stator without additional inductors),

If the external and internal windings 3 and 8 of the excitation bring the postse-nn current of such polarity, which provides for the creation of magnetic fluxes shown in FIG. ks and to the winding 4 core to supply alternating current through a semiconductor switch (direct or direct current frequency converter), a rotating magnetic field is created, interacting with

0

five

0

five

0

about 5

d

five

five

the field of teeth of the inner and outer annular magnetic cores of both rotor disks (17, 21 and 7, 22), which, in turn, leads to the emergence of a rotating electromagnetic moment acting on the machine shaft.

Claims (1)

Invention Formula Contactless electric machine of face type, comprising a stator with a toroidal magnetic circuit and an annular root winding, a gear-shaped rotor of a disk type with annular magnetic conductors of disks located on both sides of the core, an internal non-movable first excitation winding, a nonmagnetic shaft and a housing, In order to increase the specific moment of the machine, an outer annular magnetic circuit of the rotor disks, a magnetic bushing, a nonmagnetic rim, a U-shaped ring magnet wire, an external The torus excitation winding is made in the form of a coil located in a U-shaped ring magnetic conductor fixed between the outside of the stator and the inside of the non-magnetic case, and the teeth of the outer ring magnetic conductors of the left and right disks are magnetically connected through end gaps different magnetic conductor of the external excitation winding, these teeth of the external magnetic conductors are displaced among themselves by half the distance between the unipolar teeth of one disk, and the teeth of the internal annular magnetic conductors the left and right disks are rigidly interconnected through a magnetically soft sleeve, with the teeth of the outer and inner ring magnetic circuits of one disk, left and right, having opposite polarity with the opposite direction of the axial flows of the inner and outer magnetic conductors, teeth of different disks, right and left one polarity are opposite one another, while the teeth of the same polarity lying on the side of the rotor disk are rigidly interconnected and with the annular magnetic cores, the teeth of the inner ring evyh magnetic circuit the left and right drive zheskie mounted on the machine shaft, teeth belonging to external and INT 1S P 9 "„ jJ77% feb. L, ft  ui g // Editor A. Ogar Compiled by A. Santalov Tehred A. Kravchuk Proofreader 0. Tsiple Order 226 Circulation 43 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab., K / S FIG. four Subscription