CN203027031U

CN203027031U - Pole and core split structure of permanent magnet motor

Info

Publication number: CN203027031U
Application number: CN 201220689918
Authority: CN
Inventors: 高志伟; 李文富; 陈志强
Original assignee: SUZHOU DEFEMG MOTOR CO Ltd
Current assignee: SUZHOU DEFEMG MOTOR CO Ltd
Priority date: 2012-12-14
Filing date: 2012-12-14
Publication date: 2013-06-26
Anticipated expiration: 2022-12-14

Abstract

The utility model discloses a pole and core split structure of a permanent magnet motor. A pole comprises a core and magnetic steel, wherein the core and the magnetic steel are axially divided into a plurality of sections, and a plurality of sections of core assembled with the magnetic steel are combined into the pole. The pole adopts a magnetic steel and core split structure, each pole adopts multiple sections of magnetic steel, and a certain gap is reserved between every two sections of magnetic steel, so that eddy current losses of the magnetic steel in an alternating magnetic field can be reduced greatly; the magnetic steel is separately assembled on each section of core, so that interaction forces of each section of magnetic steel in core length and circumference directions during whole core assembling can be eliminated; the sections adopt keys, pins and the like as guidance; a shaft, a housing and the like are in interference fit to be tightly assembled together in a pressing manner in all directions of the pole; and acting forces in the length direction are balanced by press pressure and interference forces, and magnetic acting forces in the circumference direction are guided and balanced by the keys, the pins and the like, so that the assembling process difficulty of the magnetic steel of the permanent magnet motor is reduced, and smash or damage to a human body due to magnetic steel interaction during assembling is avoided.

Description

Permanent magnet motor magnetic pole iron core Split type structure

Technical field

The utility model relates to a kind of permanent magnet motor magnetic pole core structure, belongs to technical field of motors.

Background technology

At present, magneto is high because of its power density, and efficient is high, the power factor high all is used widely in motor, generator each field.Along with further expanding of its power, the volume of its iron core, magnetic pole is increasing, mutual magnetic force also is multiplied, very easily cause magnet steel to interact during hand assembled and cause magnet steel to break up or to the human body injury, even adopt frock to assemble, also more and more higher to the assembling manufacturing technological requirement of motor, and the magnet steel of large volume, can produce larger eddy current loss in alternating magnetic field, thus the temperature rise of aggravation pole core.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of permanent magnet motor magnetic pole iron core Split type structure, reduces the assembly technology difficulty of iron core and magnet steel, improves handling safety; Simultaneously can reduce eddy current loss.

For solving the problems of the technologies described above, the utility model provides a kind of permanent magnet motor magnetic pole iron core Split type structure, magnetic pole comprises iron core and the magnet steel that is assemblied on iron core, it is characterized in that, described iron core, magnet steel are divided into some sections vertically, difference fit on magnet steel on every iron leg core, the synthetic magnetic pole of iron core group of multistage assembling magnet steel.

Every iron leg core consists of a separate component, its outer surface and alinco assembled by laminating welding procedure (or other technique).

The length of the magnet steel that assembles on every iron leg core is shorter than this iron leg core vertically.

After the synthetic magnetic pole of iron core group of multistage assembling magnet steel, fit between the adjacent iron core of each section, form the gap between the magnet steel of the outer assembling of each iron leg core.

The iron core of multistage assembling magnet steel lead by key or pin etc., the interference fit such as axle or casing guarantee each extreme direction as one man closely be fitted in be combined into magnetic pole together after, between the adjacent iron core of each section, form gap between the magnet steel that each iron leg core assembles outward.

Each iron leg core length is identical.

The magnet steel length of assembling on each iron leg core is identical.

The beneficial effect that the utility model reaches:

magnetic pole of the present utility model adopts magnet steel, the iron core Split type structure, adopt the multistage magnet steel by every utmost point, leave certain interval between every section magnet steel, thereby significantly reduce the eddy current loss of magnet steel in alternating magnetic field, by assemble separately magnet steel on every iron leg core, thereby the interaction force of every section magnet steel on core length and circumferencial direction when getting rid of whole iron core assembly, when multistage press-fits, its length direction active force passes through key by press pressure and interference power and containing circumferencial direction magnetic force, the guiding such as pin containing, again each section passed through key, pins etc. lead, axle, the interference fit such as casing guarantee that each extreme direction unanimously closely is fitted in together, thereby reduced the technology difficulty of magnetic steel of magnetoelectric machine assembling, cause magnet steel to interact when having avoided assembling and cause breaking up or to situations such as human body injuries.

Description of drawings

Fig. 1 is every iron leg core front view;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the iron core of assembling magnet steel;

Fig. 4 is the left view of Fig. 3;

Fig. 5 is the magnetic pole schematic diagram after assembling.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described.Following examples only are used for the technical solution of the utility model more clearly is described, and can not limit protection range of the present utility model with this.

The utility model is divided into some sections with iron core, as shown in Figure 1 and Figure 2, be every iron leg core schematic diagram after segmentation, after segmentation, every iron leg core 1 is axially shorter, in the present embodiment, every iron leg core 1 is the hexagonal prism shape, is a pilot hole 11 that connects in the middle of hexagonal prism, the rib that every rib place is a projection cuts off 12.The weld seam groove 13 that has depression on wherein 3 uniform prismatic surfaces of the hexagonal prism of this iron core 1 makes every iron leg core 1 consist of a separate component by laminating welding procedure or other technique, and by weld seam groove position, each iron leg core is welded into a separate component.

On six circumferential opposite faces of the hexagonal prism of this iron leg core 1 respectively fit on N utmost point magnet steel 2, S utmost point magnet steel 3 as N, the S utmost point of iron core, as shown in Figure 3, Figure 4, the adjacent N utmost point magnet steel 2 that assembles on every iron leg core 1 side, S utmost point magnet steel 3 cut off 12 by rib and separate.On every iron leg core 1, the magnet steel 2 of assembling, 3 is shorter than iron core 1 on axially.After multistage iron core 1 assembles magnet steel 2,3 respectively ordinatedly, with multistage magnet steel 2 is housed, 3 iron core 1 press-fits respectively to power transmission shaft 5, guided by keyway or pin, bolt fixing, thereby guarantee that each extreme direction is correct, form complete magnetic pole, as shown in Figure 5.When assembling, make the N of the magnet steel of assembling on adjacent two iron leg cores 1 extremely mutually adjacent, S is extremely mutually adjacent, thereby makes outside N utmost point row, the S utmost point row mutual circulation that consists of for the multistage magnet steel of magnetic pole after assembling consist of circumferencial direction motor pole (this example is 6 utmost points).

Therefore because the magnet steel 2 of assembling on every iron leg core 1 all is shorter than iron core 1 in the axial direction, after forming magnetic pole, fits between the adjacent iron core 1 of each section, and form gap 4 between the adjacent magnet steel of each section.by with magnetic pole, iron core is divided into some sections, every utmost point magnet steel no longer adopts whole section material, but adopt multistage magnet steel 2 to be positioned over respectively on every iron leg core 1, every section magnet steel to the iron core end face at its place leaves certain interval 4, thereby make every utmost point magnet steel 2, 3 are divided into disjunct multistage magnet steel 2, 3, to dwindle the eddy current loss in magnet steel, simultaneously because of every section magnet steel 2, 3 assemblings separately, need not consider the mutual magnetic force of length and circumferencial direction, and multistage is when press-fiting, its length direction active force passes through key by press pressure and interference power and containing circumferencial direction magnetic force, the guiding such as pin containing, thereby reduced the technology difficulty of alinco assembled, effect is particularly remarkable on high-power and long iron core permanent-magnet motor especially.

Better mode is, every iron leg core is equal in length, and on iron core, the magnet steel of segmentation is equal in length.

The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and distortion, these improvement and distortion also should be considered as protection range of the present utility model.

Claims

1. permanent magnet motor magnetic pole iron core Split type structure, magnetic pole comprise iron core and are assemblied in magnet steel on iron core, it is characterized in that, described iron core, magnet steel are divided into some sections vertically, fit on magnet steel respectively on every iron leg core, the synthetic magnetic pole of iron core group of multistage assembling magnet steel.

2. permanent magnet motor magnetic pole iron core Split type structure according to claim 1, is characterized in that, every iron leg core consists of a separate component by laminating welding procedure.

3. permanent magnet motor magnetic pole iron core Split type structure according to claim 2, is characterized in that, the length of the magnet steel that assembles on every iron leg core is shorter than this iron leg core vertically.

4. permanent magnet motor magnetic pole iron core Split type structure according to claim 1, is characterized in that, after the synthetic magnetic pole of iron core group of multistage assembling magnet steel, fits between the adjacent iron core of each section, forms the gap between the magnet steel of the outer assembling of each iron leg core.

5. permanent magnet motor magnetic pole iron core Split type structure according to claim 4, is characterized in that, leads by key or pin, makes each extreme direction be combined into magnetic pole together with as one man being fitted in axle or casing interference fit.

6. permanent magnet motor magnetic pole iron core Split type structure according to claim 1, is characterized in that, each iron leg core length is identical.

7. permanent magnet motor magnetic pole iron core Split type structure according to claim 1, is characterized in that, the magnet steel length of assembling on each iron leg core is identical.