KR100928554B1 - Stator for industrial and high speed motors - Google Patents

Abstract

The present invention relates to a stator for an industrial electric motor and a high speed electric motor, and more particularly, the teeth and the yoke of the stator are formed to be separable, and the stator tooth is a directional electrical steel sheet, and the yoke is applied by applying a non-directional electrical steel sheet. The present invention relates to a stator for an industrial electric motor and a high speed electric motor which can improve the overall motor efficiency by increasing the slot area of the stator and reducing the iron loss.

for teeth,

A stator yoke having a cylindrical shape having a first connection portion formed at predetermined intervals on an inner circumferential surface thereof; And

A stator tooth of a predetermined shape having a second connection part fixedly coupled to the first connection part of the stator yoke on one side;

It provides a stator for an industrial electric motor and a high speed electric motor, characterized in that comprising a.

Industrial motor, high speed motor, stator, stator tooth, yoke, iron loss, slot, electric steel plate, directional steel plate, motor efficiency.

Description

Stator In The Electrical Motor For Industry And High Speed}

The present invention relates to a stator for an industrial motor and a high speed motor.

In general, an electric motor is also referred to as a motor, and refers to an application of an electromagnetic induction phenomenon in which electromagnetic force is generated in a direction perpendicular to a magnetic field when a conductor is placed at a right angle in a magnetic field and current is applied thereto.

The electric motor as described above includes an industrial electric motor or a high speed electric motor. The motor is fixed in a cylindrical shape and wound around a coil, and is rotated by an induction magnet formed around the coil by being located inside or outside the stator. It can be classified into a rotor that transmits power.

On the other hand, the stator of the conventional industrial or high-speed motor has a structure in which the stator yoke 20 and the stator teeth 10 are composed of one iron core as shown in FIG.

That is, a plurality of stator teeth 10 are formed on the inner circumferential surface of the stator yoke 20, and a coil is wound around the slots between the stator teeth 10.

At this time, since the stator yoke 20 and the stator tooth 10 are integrally formed, they are made of one material, and are generally made of non-oriented electrical steel sheet.

However, in order to improve the efficiency of the electric motor, it is necessary to increase the area of the slot into which the winding is inserted. However, the stator according to the related art has reached a limit in increasing the slot area due to the saturation of the magnetic flux density of the stator teeth. There is a need for a stator structure.

The present invention has been made in view of the above, and the teeth and yokes of the stator are formed to be separable, and the stator teeth are oriented electrical steel sheets, and the yokes are non-oriented electrical steel sheets. In addition, by providing a plurality of grooves on the other side of the stator teeth, an object of the present invention is to provide a stator for an industrial electric motor and a high speed motor that can increase the slot area of the stator and reduce the iron loss to improve the overall motor efficiency.

The stator for the present invention industrial motor and high speed motor as described above,

A stator yoke having a cylindrical shape having a first connection portion formed at predetermined intervals on an inner circumferential surface thereof; And

A stator tooth of a predetermined shape having a second connection part fixedly coupled to the first connection part of the stator yoke on one side;

Characterized in that comprises a.

In particular, the stator yoke is formed of a non-oriented electrical steel sheet, characterized in that the stator teeth are formed of a directional electrical steel sheet.

In addition, the first connection portion is composed of a groove of a predetermined depth, the second connection portion is characterized in that it is composed of a projection of a predetermined height.

In addition, the stator tooth is characterized in that it comprises a plurality of grooves formed on the other side.

In addition, the stator tooth is characterized in that it comprises a non-magnetic material inserted into the plurality of grooves.

According to the stator for the present invention industrial motor and high speed motor as described above,

First, the stator teeth can be used to improve the overall motor efficiency by using a oriented electrical steel sheet with high saturation magnetic flux density and low iron loss.

Secondly, by increasing the slot area of the stator, the amount of insertion of the windings can be increased,

Third, the iron loss can be reduced by forming a plurality of grooves on one side of the stator teeth,

Fourth, the additional wind loss can be minimized by inserting the nonmagnetic material into the groove of the stator, so that the efficiency of the electric motor is increased, and thus a considerable commercial and economic effect is expected.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. A singular expression includes a plural expression unless the context clearly indicates otherwise. In this application, the terms “comprise” or “having” are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more. It is to be understood that it does not exclude in advance the possibility of the presence or addition of other features or numbers, steps, operations, components, components or combinations thereof.

Hereinafter, the structure of the stator according to the present invention will be described with reference to FIGS. 3 and 4.

3 shows a detachable stator yoke 40 and stator teeth 30 according to the invention, and FIG. 4 is an enlarged view of a portion of the figure.

As shown, the stator according to the present invention is formed in a structure in which the stator teeth 30 and the stator yoke 40 are separable.

The stator yoke 40 includes a groove 42 having a predetermined depth formed at a predetermined interval on the inner circumferential surface as a first connecting portion, and the stator tooth 30 has a protrusion having a predetermined height formed at one side as a second connecting portion. And 34. At this time, the first connection portion and the second connection portion has a structure that can be fixedly coupled to each other.

In addition, the stator yoke 40 is formed of a non-oriented electrical steel sheet, the stator teeth 30 is formed of a directional electrical steel sheet.

The grain-oriented electrical steel sheet has a higher saturation magnetic flux density than that of the non-oriented electrical steel sheet and also has a low iron loss. However, since the direction of the magnetic flux can be determined, the grain-oriented electrical steel sheet can be applied only to the stator teeth 30 as described above.

As described above, by using the directional electrical steel sheet having excellent magnetic properties for the stator teeth 30, the overall electric motor efficiency can be increased.

Hereinafter, the structure of the stator tooth 30 according to the present invention will be described with reference to FIG. 5.

As shown, the stator tooth 30 has a protrusion 34 having a predetermined height as a second connection portion at one side, and a plurality of grooves 32 are formed at the other side, which is relatively wider than one side.

By forming a plurality of grooves 32 on the other side of the stator teeth as described above can reduce the iron loss to increase the efficiency of the motor.

Hereinafter, the structure of the stator yoke 40 which concerns on this invention with reference to FIG. 6 is demonstrated.

As shown, the stator yoke comprises a groove 42 of a predetermined depth formed at regular intervals on the inner circumferential surface as a first connection portion.

In addition, by inserting the non-magnetic material 36 into the groove 32 of the stator teeth as shown in Figure 7, the windage loss of the additionally generated motor is minimized.

By applying the directional electrical steel sheet to the stator teeth 30, the direction of the magnetic flux is relatively constant as described above, it is possible to reduce the area of the stator teeth 30, increase the area of the slot, reduce the iron loss to improve the efficiency of the motor Can be.

In addition, in the present embodiment, as the connection portion of the stator teeth 30 and the stator yoke 40, a protrusion having a predetermined height and a groove of a predetermined depth are used, but in addition, a connection obvious to those skilled in the art to which the present invention pertains. All means can be used.

While the invention has been shown and described with respect to certain preferred embodiments, the invention is not limited to these embodiments, and those of ordinary skill in the art claim the invention as claimed in the appended claims. It includes all the various forms of embodiments that can be implemented without departing from the spirit.

1 is a view showing the stator yoke and stator teeth formed integrally according to the prior art;

Figure 2 is an enlarged view showing the stator yoke and stator teeth formed integrally according to the prior art,

3 is a view showing a detachable stator yoke and stator teeth according to the present invention;

4 is an enlarged view showing a detachable stator yoke and stator teeth according to the present invention;

5 is a view showing a stator tooth according to the present invention;

6 is a view showing a stator yoke according to the present invention;

7 is a view showing a stator yoke in which a nonmagnetic material is inserted according to the present invention.

<Description of Signs of Major Parts of Drawings>

10: Stator tooth according to the prior art 20: Stator yoke according to the prior art

30 stator tooth 32 according to the present invention

34: projection of stator teeth 36: nonmagnetic material

40: stator yoke according to the present invention 42: groove of the stator yoke

Claims (5)

delete delete delete delete An industrial motor and a high speed electric motor including a stator yoke having a cylindrical shape having a first connection part formed at predetermined intervals on an inner circumferential surface, and a stator tooth of a predetermined shape formed at one side of the second connection part fixedly coupled to the first connection part of the stator yoke. In the stator for The stator tooth includes a plurality of grooves formed on the other side, The stator tooth is a stator for an industrial electric motor and a high speed motor, characterized in that it comprises a nonmagnetic material inserted into the plurality of grooves.

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