CN100456599C

CN100456599C - Iron core of motor

Info

Publication number: CN100456599C
Application number: CNB2004100721961A
Authority: CN
Inventors: 李炅动; 申铉薰
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2004-09-27
Filing date: 2004-09-27
Publication date: 2009-01-28
Anticipated expiration: 2024-09-27
Also published as: CN1756027A

Abstract

The present invention relates to a motor iron core, which is composed of a stator core and a rotor core, wherein the stator core comprises a stator tooth crest, a stator tooth middle and a stator yoke, and is formed by stacking steel sheets; the rotor core is arranged at one side of the stator core and is formed by stacking steel sheets. A metal plate is stacked for the stator tooth crest and the rotor core, but the stator tooth middle does not have the metal plate, so the thickness at the direction of a motor rotating shaft is thicker than that of the position of the stator tooth middle; the thickness of the stator tooth crest and the rotor core at the direction of the rotating shaft is the same as that of the external leakage part of stator copper wires wound on the stator tooth middle. With the structure, the present invention effectively reduces magnetic leakage generated by the external leakage part of the copper wire and raises the electromechanical efficiency; the present invention can generate torque with large output power and obtain vibration reduction effect, and the rotor inertia is increased.

Description

The iron core of motor

Technical field

The present invention relates to the invention of electric machine iron core, more specifically relate to improve stator core and rotor core to prevent the electric machine iron core of leakage field.

Background technology

In general motor is to be made of comprise stator core and rotor core that the steel disc lamination forms.Be wound with copper cash in the stator core, can produce magnetic field when switching on the copper cash.Also has the space that between stator core and rotor core, has magnetic field and rotor to respond to mutually.

The stator and the rotor structure of above-mentioned motor are described with reference to Fig. 1.

Fig. 1 is the common stator and the sectional view of rotor core.As shown in the figure, stator core 1 is formed by the steel disc lamination, and the structure of stator core 1 comprises 1b and stator yoke 1c in stator tooth top 1a, the stator tooth.

Also have, there is rotor core 2 inboard of stator core 1.Rotor core 2 is also formed by the steel disc lamination, and 1b, the stator yoke 1c thickness h 1 on the rotating shaft direction all is identical in rotor core 2 and stator tooth top 1a, the stator tooth.

1b goes up the after-applied power supply of winding copper cash and can produce magnetic field in the stator tooth.The following structure that above-mentioned winding copper cash is described with reference to Fig. 2.

Fig. 2 is the part oblique view that twines copper cash on the iron core of common electric machine.Twining copper cash 3 in the stator tooth on the 1b, the copper cash of particularly every extremely every phase all enters in the groove, and its canoe is concentrated canoe.

Electric motor starting principle as said structure is as follows, gives to be wrapped in the stator tooth after 3 energized of the copper cash on the 1b, can produce magnetic field in stator core 1, and magnetic field is responded to rotor mutually by the space.

With the interact power that generates an electromagnetic field and rotate above-mentioned rotor of the excitation field of tangent magnetic field of rotor 2 and rotor 2, revolving force is delivered to the outside by the rotating shafts (not shown) that are inserted in the rotor 2.

But, when stator core 1 and rotor core 2 structures are twined copper cash 3, as shown in Figure 2, produce the copper cash 3a of portion that leaks outside in the top and the bottom of stator core 1.Also have because the limitation of the shape of 1b and copper cash 3 self flexibility in the stator tooth, can't be in full stator tooth 1b.

At this moment, leaking outside most of magnetic flux that the 3a of portion produces from copper cash can't be tangent and outflow with iron core, and this can cause electric efficiency to descend.

Also have, increased unnecessary height, consider, also become the factor that reduces torque from motor overall dimension in the electric machine rotational axis direction.

Summary of the invention

For overcoming the above-mentioned shortcoming of prior art, the purpose of this invention is to provide by improving structure, effectively reducing leakage field and raise the efficiency and produce the electric machine iron core of big output torque.

Address the above problem and be purpose electric machine iron core of the present invention, comprise in stator tooth top, the stator tooth and the stator core of stator yoke structure and constitute by the rotor core that the steel disc lamination forms in the stator core inboard by what the steel disc lamination formed.Stator tooth top and rotor core be than the steel disc that superposeed in the stator tooth more, so they are thick in than stator tooth at the thickness of electric machine rotational axis direction.

Also have, stator tooth top and rotor core be at the axial thickness of rotation, preferably be wrapped in stator tooth on the thickness of the portion that leaks outside of stator copper identical.

Electric machine iron core of the present invention has as constituted above improved the axial height of rotation of rotor and stator tooth top, can effectively reduce the leakage field that the copper cash portion of leaking outside produces; Improved electric efficiency, not only produced big output torque, thereby and the inertia that has improved rotor reduced vibration.

And, separate formation in the stator tooth with stator yoke, so be inserted into the method in the face in the stator tooth after can utilizing the reel coiling, realize that face fully contacts in copper cash and the stator tooth; Appended folded button again, can make the even lamination of above-mentioned steel disc.

Description of drawings

Fig. 1 is the sectional view of common electric machine stator and rotor core.

Fig. 2 is the part oblique view that twines copper cash on the iron core of common electric machine.

Fig. 3 is the sectional view of motor stator of the present invention and rotor core.

Fig. 4 is the part oblique view that twines copper cash on the electric machine iron core of the present invention.

Fig. 5 is the stator core structure figure of electric machine iron core of the present invention.

The symbol description of major part in the accompanying drawing:

10: stator core 11: the stator tooth top

12: in the stator tooth 13: stator yoke

20: rotor core 50: folded button

Embodiment

Below, describe in detail about electric machine iron core of the present invention with reference to accompanying drawing.

Fig. 3 is the sectional view of motor stator of the present invention and rotor core, and Fig. 4 is the part oblique view that twines copper cash on the electric machine iron core of the present invention.

Electric machine iron core of the present invention comprises stator core 10 and rotor core 20.To concentrate canoe in stator core 10, to twine copper cash 30, apply to copper cash 30 under the induced field and induced field and excitation field interaction of power supply generation, rotor core 20 is rotated, and the mode of rotor 20 was with generally Starting mode was identical.

The stator core 10 of electric machine iron core of the present invention by in stator tooth top 11, the stator tooth 12 and stator yoke 13 constitute.Particularly, rotor 20 and stator tooth top 11 the axial height h2 of the rotation of motor than stator tooth in 12 height h1 big.

Also have, according to embodiments of the invention, stator tooth top 11 and rotor core 20 at the axial height of rotation, because of the stack steel disc can be wrapped in stator tooth in the position height of the portion that leaks outside of stator copper 30 on 12 identical.

As mentioned above, wanting of the original structure of aspect ratio of stator tooth top 11 and rotor core 20 is high, has prevented that the portion that leaks outside of copper cash 30 from protruding to stator core 10 outsides, and has reduced the leakage field of the portion's of leaking outside generation of copper cash 30.Also have, when electric machine casing overall dimension is considered relatively, when utilizing, improved stator tooth top and rotor core and rotated axial height, so can obtain than bigger output torque originally with original the same copper cash amount.

Also have,, cause raw material and weight to increase, improved the inertia force of rotor because the axial height of the rotation of rotor core 20 increases.So, when ON/OFF is applied to power supply on the copper cash, can reduce the oscillation phenomenon of the rotor that produces owing to variation that the rotor rotation starts.

On the other hand, 12 can separate formation with stator yoke 13 in the stator tooth in the electric machine iron core of the present invention, above-mentioned separate shape as shown in Figure 5.

12 lateral direction in stator core 10 are formed with and insert projection in the stator tooth, and stator yoke 13 is formed with and inserts the insertion groove that projection matches, thus in the stator tooth of separation 12 and stator yoke 13 can in conjunction with.

12 can not contact as face stator tooth with copper cash 30 on its structure to greatest extent in the stator tooth.In order to improve this problem, can take the reel 40 that has twined copper cash 30 is inserted in the stator tooth mode on 12.As mentioned above, 12 separate formation with stator yoke 13 in the stator tooth, so can utilize the winding operation of reel.

When making the stator core 10 of above-mentioned motor, 12 is to form with the production method of one lamination in stator tooth top 11 and the stator tooth.But stator tooth top 11 of the present invention wants high at the axial height of rotation, therefore need 12 separate stator tooth top 11 to carry out moulding separately and make lamination from stator tooth.

For electric machine iron core of the present invention, constitute in the stator tooth top 11, stator tooth of stator core 10 12, all have on stator yoke 13 and the rotor 20 and foldedly buckle 50.When carrying out the steel disc lamination of above-mentioned iron core, evenly carry out the lamination operation to the rotating shaft direction.

Though the illustration with reference to speed changeable type motor has illustrated aforesaid the present invention, the present invention not only is confined to the embodiment and the drawing of this specification, but can quote flexibly in technological thought protection range of the present invention.

Claims

1, a kind of iron core of motor, comprise in the stator tooth top that forms by the steel disc lamination, the stator tooth and the stator core of stator yoke structure and the rotor core that forms by the steel disc lamination in the stator core inboard, it is characterized in that, want high in stator tooth top that is built up by steel disc and the aspect ratio stator tooth of rotor core on the electric machine rotational axis direction, stator tooth top and rotor core are identical with the leak outside position height of portion of the stator copper in being wrapped in stator tooth at the axial height of rotation.

2, the iron core of motor according to claim 1 is characterized in that stator core forms by separating with stator yoke in the stator tooth.

3, the iron core of motor according to claim 2 is characterized in that in order to realize fully contacting of face in copper cash and the stator tooth, be inserted in the stator tooth after the reel coiling on.

4, the iron core of motor according to claim 1 is characterized in that, in stator tooth top, the stator tooth and stator yoke evenly carry out the lamination operation in the electric machine rotational axis direction, in stator tooth top, stator tooth, on the stator yoke, all be formed with folded the button.

5, the iron core of motor according to claim 1, the winding mode that it is characterized in that stator core are to concentrate winding mode.