CN101572446A

CN101572446A - Motor

Info

Publication number: CN101572446A
Application number: CNA2008100529683A
Authority: CN
Inventors: 金汉基
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2008-04-30
Filing date: 2008-04-30
Publication date: 2009-11-04

Abstract

The invention discloses a motor which comprises a stator iron core. The stator iron core comprises a plurality of T-shaped parts, pole shoes, inclined parts, insulators and a stator winding, wherein the T-shaped parts protrude from a basal part towards a center direction along the radial direction and are formed in the circumference direction, and the pole shoes are formed by extending the end parts of the T-shaped parts from the circumference direction towards both sides; each inclined part at the tail end of each pole shoe is formed by the gradual reduction of an inner peripheral surface of each pole shoe towards the end part of each T-shaped part; each insulator covers each T-shaped part, at least part of each inclined part and at least part of the basal part; and the stator winding is wound on the T-shaped parts covered by the insulators and is insulated from the stator iron core. The motor maximizes the winding area of a stator wound on the stator iron core and keeps the inner peripheral surfaces of the pole shoes in an insulation distance from the stator winding by insulated protrusions so as to reduce the insulation thickness of the insulators and save the material cost.

Description

Motor

Technical field

The present invention relates to a kind of motor, particularly relate to a kind of motor that stator winding is wound on the coiling area maximization on the stator core and guarantees insulation distance.

Background technology

Usually brushless direct-current (BLDC) motor is meant the rectified action that originally utilizes brush and commutator mechanically to carry out, the motor that substitutes with semiconductor relay.

Above-mentioned motor comprise the stator that is fixedly installed on casing inside and be arranged at certain intervals described stator interior, by and stator between interaction and rotor rotated.

Above-mentioned rotor comprises the rotor core that is formed by a plurality of folded silicon steel slices, the rotating shaft that is pressed into described rotor core center and replaces structure arranged along the circumferencial direction of described rotor core with different magnetic pole mutually and sticks on a plurality of magnets around the rotor core.

Fig. 1 is the generalized section of the stator core and the insulator structure of prior art; Fig. 2 is the generalized section of prior motor structure.

As shown in Figure 1 and Figure 2, described stator 1 comprises the stator core 11 that formed by a plurality of folded silicon steel slices, is wound on the coil 16 on the described stator core 11 and the insulator 15 of the described stator core 11 that is used to insulate.

Described stator core 11 by the base portion 12 of annular, in the footpath of described base portion 12 outstanding and a plurality of T shape parts 13 of arranging at certain intervals of direction around upwards to the center.In addition, the end at described T shape part 13 is formed with the pole shoe 14 that extends to both sides along the circumferencial direction of described stator core 11.

Described pole shoe 14 extends certain-length from the end of described T shape part 13 to both sides, and its both side ends has cut structure.

The structure that described stator core 11 can form rotating magnetic field during with energized is wound on the T shape part 13, and by insulator 15 and described stator core 11 insulation.

Above-mentioned insulator 15 does not still have insulator at the inner peripheral surface and the both ends of pole shoe 14 to encircle described stator core 11 with the corresponding shape of the shape of stator core 11.

On the T shape part 13 of the stator core 11 that insulate by above-mentioned insulator 15, reeling and forming the coil of rotating magnetic field.

In addition, keep state of insulation in order to make not forming between 15 exposed face and the coil of described stator core 11, described insulator 15 need be kept certain thickness.

In addition, the area of the coiling of described stator winding 16 since the shape of stator core 11 and the insulation thickness face of insulator be restricted.

Summary of the invention

In order to address the above problem, the object of the present invention is to provide a kind ofly when making stator winding and stator core keep insulation distance, make the maximized motor of coiling area of stator winding.

Another object of the present invention is to: the motor that reduces material cost by the insulation thickness that reduces insulator.

The objective of the invention is to be achieved through the following technical solutions:

A kind of motor comprises: stator core, described stator core comprise from base portion radially the pole shoe outstanding and that form a plurality of T shape parts and extend to form to both sides at circumferencial direction from the end of described T shape part at circumferencial direction to center position; Be formed at the rake of pole shoe end, described rake is dwindled gradually and forms to the end of T shape part by the inner peripheral surface of pole shoe; Cover on the described T shape part, at least a portion of described rake and the insulator at least a portion of described base portion; And be wound on the T shape part that is coated with insulator, with the stator winding of described stator core insulation.

Above-mentioned rake is formed at from the both sides of the pole shoe of T shape part extension, and rake forms agley.Therefore the coil of on the pole shoe of above-mentioned bending, inclination, also can reeling, thus the coiling area of stator winding increased.

Above-mentioned insulator comprises the insulation projection that is formed on the described rake, makes described stator core and stator winding insulation.That is, the area maximization for the said stator coiling is reeled forms the insulation projection on above-mentioned rake, can allow said stator iron core and stator winding keep insulation distance.

Above-mentioned insulator has and the corresponding shape of stator core, and to the two ends of pole shoe, its crooked amplitude is more little more.

Motor of the present invention has following invention effect:

Be formed with rake on the both ends of the surface of the pole shoe of stator core, the area that stator winding is wound on the stator core expands on the pole shoe, can make the coiling area maximization of stator winding.

Be used to make the insulator of stator core insulation on the both ends of the surface of pole shoe, to form the insulation projection, when stator winding is wound up into the inclined plane of pole shoe, make the coil and the inner peripheral surface of the pole shoe that does not form insulator keep insulation distance.

Because can make the inner peripheral surface and the stator winding that do not form insulator keep insulation distance by the projection that insulate, thus the insulation thickness of insulator can be reduced, thus can save material cost.

Description of drawings

Fig. 1 is the generalized section of the stator core and the insulator structure of prior art;

Fig. 2 is the cross-sectional view of prior motor;

Fig. 3 is the generalized section of stator core of the present invention and insulator structure;

Fig. 4 is the cross-sectional view of motor of the present invention.

Wherein:

100: motor 110: stator core

111: base portion 112:T shape part

113: pole shoe 113a: inclined plane

113b: inner peripheral surface 120: insulator

121: insulation projection 130: stator winding

Embodiment

Concrete structure to motor of the present invention is elaborated with reference to the accompanying drawings.

Fig. 3 is the generalized section of stator core of the present invention and insulator structure, and Fig. 4 is the profile of electric machine structure of the present invention.

As shown in Figure 3, Figure 4, motor 100 of the present invention comprises: be arranged on the stator core 110 on the casing (not shown) regularly, make described stator core 110 be in the insulator 120 of state of insulation, and the stator winding 130 that when energized, forms rotating magnetic field.

Described stator core 110 by annular base 111 stator core 110 radially outstanding to center position, form a plurality of silicon steel sheets that a plurality of T shape parts 112 of a plurality of flutings constitute at circumferencial direction and form by the certain thickness lamination.

Be formed with the pole shoe 113 that extends at circumferencial direction in the both sides, end of above-mentioned T shape part 112.

It is more little that above-mentioned pole shoe 113 arrives its crooked amplitude of both side ends more, and the extended surface from T shape part to pole shoe tilts.

Above-mentioned inclined plane 113a is formed on the both sides of pole shoe 113, and inclined plane 113a forms agley.

In addition, the gradient that has till the inner peripheral surface 113b that extends to above-mentioned pole shoe 113 of above-mentioned inclined plane 113a is advisable.

This is because when above-mentioned pole shoe 113 had inclined plane 113a, the coiling area that is wound on the coil on the above-mentioned T shape part 112 can expand on the 113a of inclined plane.

For the insulation between said stator iron core 110 and the stator winding 130, on the T shape part 112, be coated with insulator 120 at least a portion of rake 113a and at least a portion of base portion 111.That is, described insulator 120 is formed on the position except that the pole shoe inner peripheral surface 113b of stator core 110.

Described insulator 120 can be assembled by upper insulator and lower insulator.Upper insulator with the top of the corresponding shape covering stator of the shape of stator core 110 iron core 110, it is made by insulating material.Described lower insulator with the bottom of stator core 110 corresponding shape covering stator iron cores 110, fit together with upper insulator.

In addition, as another embodiment, described insulator 120 forms with the structure of the said stator iron core 110 that can insulate by the injection moulding of embedding lining.

Described insulator 120 is corresponding with the shape of stator core 110, and insulate protruding 121 outstanding being formed with of both side ends of pole shoe 113.

When stator winding 130 is wound on the stator core 110, because the inner peripheral surface 113b of pole shoe 113 does not have insulated body 120 insulation, therefore in order to make described stator winding 130 keep certain insulation distance with described inner peripheral surface 113b, described insulation projection 121 is formed on the inclined plane 113a of pole shoe 113 both side ends.

Because under the effect of described insulation projection 121, inner peripheral surface 113b can be in state of insulation, therefore the insulator 120 that is formed on pole shoe 113 and the T shape part 112 can be thinner.

Described stator winding 130 is wound on the T shape part 112 of stator core 110, can extend on the inclined plane 113a that is wound up into pole shoe.In addition, under the effect of insulation projection 121, stator winding 130 keeps insulation distance with the inner peripheral surface 113b of the pole shoe that exposes 113 that does not have insulated body 120 insulation.

Claims

1. motor, it is characterized in that comprising: stator core, described stator core comprise from base portion radially the pole shoe outstanding and that form a plurality of T shape parts and extend to form to both sides at circumferencial direction from the end of described T shape part at circumferencial direction to center position; Be formed at the rake of pole shoe end, described rake is dwindled gradually and forms to the end of T shape part by the inner peripheral surface of pole shoe; Cover on the described T shape part, at least a portion of described rake and the insulator at least a portion of described base portion; And be wound on the T shape part that is coated with insulator, with the stator winding of described stator core insulation.

2. motor according to claim 1 is characterized in that: described rake is formed at from the both sides of the pole shoe of T shape part extension.

3. motor according to claim 2 is characterized in that: described rake forms agley.

4. motor according to claim 1 is characterized in that: described insulator comprises the insulation projection that is formed on the described rake, makes described stator core and stator winding insulation.

5. motor according to claim 4 is characterized in that: described insulator has and the corresponding shape of stator core, and to the two ends of pole shoe, its crooked amplitude is more little more.