KR20160086698A - Stator assembly of Motor - Google Patents

Abstract

According to the present invention, a stator assembly of a motor comprises: a stator core wound by a stator coil with a constant spiral wound type; an insulation coating layer formed on a surface of the stator core and configured to mutually insulate the stator core and the stator coil; and a rib formed on the stator core and supporting the spiral wound type of the stator coil. According to the present invention, performance and efficiency of a motor may be improved.

Description

Stator assembly of motor < RTI ID = 0.0 >

The present invention relates to a stator assembly of a motor.

Generally, the motor transmits the rotating force of the rotor to the rotating shaft, and the rotating shaft drives the load. For example, the rotary shaft may be connected to the drum of the washing machine to drive the drum, and the fan may be connected to the fan of the refrigerator to supply cool air to the required space.

On the other hand, in such a motor, the rotor is rotated by electromagnetic interaction with the stator. To this end, a coil is wound on the stator, and as the current is applied to the coil, the rotor rotates with respect to the stator, and the stator includes a stator core. The stator core is made of a conductor.

In addition, a stator is generally fixed to an object. Fixing means are required to fix such a stator to an object such as a motor housing or a motor bracket.

Furthermore, since the stator coil is wound on the stator, insulating means are required to mutually isolate the stator coil and the stator core.

The stator coil is generally made of copper. This is because the copper material is excellent in electrical conductivity and ductility, so that it is less damaged during winding. However, the copper material generally has a very high cost, and thus the manufacturing cost of the motor is increased.

Therefore, it is necessary to use a coil made of a material other than a copper material to reduce the manufacturing cost of the motor and stably supply and receive the raw material. However, even if the coils of different materials are used, It is necessary to manufacture the motor at least equal to or higher than the equivalent quality.

2001-0068827

The present invention relates to a motor stator having a stator core and a motor stator core which can insulate the stator coil from the stator core by forming an insulating coating layer on the surface of the stator core and adding a rib to one surface of the stator core, Assembly.

The assembly of the motor stator according to the present invention can significantly reduce the volume of the portion where the coil is wound by using an insulating coating layer instead of the insulator for insulation between the stator coil and the stator core, The number of windings of the stator coil can be increased by reducing the thickness of the portion where the coil is wound and increasing the space area of the rotor, . ≪ / RTI >

Therefore, the stator assembly of the motor according to the present invention comprises a stator core in which the stator coil is wound with a constant winding, an insulating coating layer formed on the surface of the stator core and insulating the stator coil from the stator core, And a rib supporting the winding of the stator coil.

The stator core includes a base formed in an annular shape and a plurality of teeth spaced apart from each other along the circumferential direction of the base to protrude radially outward and to which the stator coil is wound. Further, the insulating coating layer is continuously formed from the circumferential surface of the base to the end of the tooth.

Further, the rib may include a plurality of rib grooves formed in the circumferential direction on the upper surface of the base or the top end of the tooth, a support member inserted in the rib groove and supporting the spiral of the stator coil, And an insulating film formed in the spacing space (slot).

FIG. 1A is a perspective view with a rib groove added to a motor stator assembly according to an embodiment of the present invention, and FIG. 1B is a plan view of FIG. 1A.
FIG. 2A is a perspective view of a support member inserted into a rib groove of a motor stator assembly according to an embodiment of the present invention, and FIG. 2B is a plan view of FIG. 2A.
3 is a view showing a conventional stator assembly.
FIG. 4A is an enlarged view of part A of FIG. 2A according to an embodiment of the present invention, FIG. 4B is a plan view of part B of FIG. 4A, and FIG.
FIG. 5A is an enlarged view of part A of FIG. 2A according to an embodiment of the present invention, FIG. 5B is a plan view of part B of FIG. 5A, and FIG. 5C is a view of FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. Also, the terms "one side,"" first, ""first,"" second, "and the like are used to distinguish one element from another, no. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of related arts which may unnecessarily obscure the gist of the present invention will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The stator assembly of the present invention can be applied to a brushless DC (BLDC) motor, but is not limited thereto.

Here, the motor may be of an outer rotor type (in which the rotor is provided on the outer side of the stator core) or an inner rotor (in which the rotor is provided on the inner side of the stator core) Can be applied to an inner rotor type motor as well as an outer rotor type motor.

FIG. 1A is a perspective view with a rib groove added to a motor stator assembly according to an embodiment of the present invention, and FIG. 1B is a plan view of FIG. 1A. FIG. 2A is a perspective view of a support member inserted into a rib groove of a motor stator assembly according to an embodiment of the present invention, and FIG. 2B is a plan view of FIG. 2A.

As shown in FIGS. 1A and 2B, a motor stator assembly according to the present invention includes a stator core 100 in which a stator coil 123 is wound in a predetermined winding shape, a stator core An insulating coating layer 150 and a rib 130 for supporting the winding of the stator coil.

The stator core 100 is a conductor in which the stator coil 123 is wound in a constant winding shape and the current is applied to the stator coil 123 so that the stator core 123 is rotated by the electromagnetic interaction between the rotor (not shown) .

The stator core 100 may be formed by stacking the base 110 and the teeth 120 punched out of the steel sheet together. That is, the stator core 100 may be formed in a spiral shape in which the strip-shaped base 110 and the teeth 120 vertically protruding from the base 110 are laminated while being bent in a spiral shape, But the present invention is not limited thereto.

The stator core 100 includes a plurality of teeth 120 spaced apart along the circumference of the base 110 and the base 110 and formed to protrude radially outward.

Here, the base 110 may have an annular shape in the center of the stator core 100, and the teeth 120 may be formed to project radially outward along the circumference of the base 110 , And the stator coil 123 is wound.

Further, a coil having one magnetic pole in one tooth 120 may be wound, but the teeth 120 need to be insulated from each other, and the teeth 120 and the stator coil 123 are mutually insulated.

The tooth 120 includes a tooth body 122 extending radially from the outer circumferential surface 110a of the base 110 and a pole 121 extending from both ends of the tooth body 122 in the circumferential direction. do. Here, the poles 121 are formed so that the outer diameters of both side ends 121c become smaller toward the circumferential direction, thereby alleviating the rapid change of the magnetic poles.

The motor may be divided into an outer rotor type or an inner rotor type in accordance with the projecting direction of the teeth 120. In FIGS. 1A and 2B, a rotor (not shown) is provided outside the stator core 100, A stator assembly of an outer rotor type is shown.

However, in the stator assembly 100 according to the embodiment of the present invention, the teeth 120 may protrude radially inward along the inner periphery of the base 110. In this case, the inner rotor- It can be an assembly.

As shown in FIGS. 1A and 1B, an insulating coating layer 150 is formed on the surface of the stator core 100 to mutually isolate the stator coil 123 and the stator core 100 as a conductor. That is, the insulating coating layer 150 is continuously formed from the outer peripheral surface 110a of the base 110 to the end of the teeth 120, and the thickness of the insulating coating layer 150 may be formed to be much smaller than the thickness of the teeth 120 And may be formed so as to have a continuously uniform thickness at a portion where the stator coil 123 is wound.

In addition, the insulating coating layer 150 may be formed of not only a liquid polymer resin but also a polymer resin in a powder state. That is, the polymer resin powder can be applied to the insulator by electrostatic spraying or a fluidized bed deposition apparatus.

Here, 1) a method using an electrostatic spray can be a method of attaching a powder coating material to an object to be insulated by using compressed air differently from an electrode of an insulator and a powder coating material, and 2) To generate a flow state of the powder coating material and to insert the powder coating material into the object to be insulated by inserting a previously heated object.

As shown in FIGS. 2A and 2B, the ribs 130 are formed on the stator core 100 and support the spool of the stator coil 123. The rib 130 is inserted into the rib groove 131 and the plurality of rib grooves 131 formed in the circumferential direction on the upper surface of the base 110 of the stator core 100 or the distal end of the teeth 120, And a support member 132 for supporting the spiral of the coil 123. [

That is, the rib 130 has a plurality of rib grooves 131 formed in the circumferential direction at the center of the upper surface of the base 110 of the stator core 100 or the corresponding upper surface of the pole 121, And a plurality of support members 132 for supporting the spool of the stator coil 123. [ Here, the support member 132, the poles 121 and the base 110 maintain the coiled state of the stator coil 123 by restricting the radial movement of the stator coil 123, And may be formed of a material having an insulating property (insulator or the like) for insulation between the chain pole 121 and the stator coil 123.

The stator core 123 corresponding to each phase of u, v and w may be wound on the tooth body 122 of the stator core 100. [ One coil may be wound on one tooth 120 so that one tooth 120 has one magnetic pole (concentrated winding method). As the number of magnetic poles of the stator increases, the maximum rotation speed of the rotor (not shown) becomes smaller, so that it is easy to control the motor and the maximum torque can also be relatively large.

For example, when the winding of the coil of the u-phase is completed in one tooth 120, the coil is wound and fixed on the rib 130 provided at the end of the tooth 120, And then rewound to the next tooth 120. [ In this way, v-phase and w-phase coils are also wound, and the ends of the coils of each phase are all connected to neutral tap (not shown).

3 to 5, a motor stator assembly according to an embodiment of the present invention will be described in more detail.

3 is a view showing a conventional stator assembly. FIG. 4A is an enlarged view of part A of FIG. 2A according to an embodiment of the present invention, FIG. 4B is a plan view of part B of FIG. 4A, and FIG.

FIG. 5A is an enlarged view of a portion A of FIG. 2A according to an embodiment of the present invention, FIG. 5B is a plan view of portion B of FIG. 5A, and FIG. 5C is a view of FIG.

3A and 3B, the conventional stator assembly 1 has a structure in which insulation between the stator core 100, which is a conductor, and the stator coil 123, which is wound around the teeth 120 of the stator core 100, An insulator () is generally provided between the teeth 120 and the stator coil 123. [ That is, the upper and lower insulators 10 and 30 are coupled to the upper and lower portions of the stator core 100, respectively, and the insulators 10 and 30 corresponding to the teeth 120 of the stator core 100 And the stator coil 123 was wound on the winding portion.

However, under the structure in which the stator coil 123 is wound on the winding portion of the insulator (I), as the thickness of the winding portion 11 becomes larger, the interval between the winding portions becomes narrower. As a result, the number of turns of the stator coil 123 that can be wound on the winding portion 11 is reduced, and as the thickness of the coil is increased, an unnecessary increase in the volume of the stator assembly and the length of the coil is problematic .

4A to 4C, an assembly 100 of a motor stator according to an embodiment of the present invention includes a stator core 100 for insulation between a stator core 100 and a stator coil 123, And the stator coil 123 is wound on the insulating coating layer 150. The insulating coating layer 150 is formed on the insulating coating layer 150,

The insulating coating layer 150 may be formed from the outer circumferential surface 110a of the base 110 constituting the stator core 100 to the ends of the plurality of teeth 120 protruding along the circumferential direction of the base 110 (Fig. 4A).

The insulating coating layer 150 is formed on the outer surface 110a of the base 110 constituting the stator core 100 and the outer surface 121b of the plurality of teeth 120 protruded along the circumferential direction of the base 110. [ ) (Fig. 4A).

That is, the insulating coating layer 150 includes a tooth body 122 to which the stator coil 123 is wound, an outer circumferential surface 110a of the base 110 in electrical contact with the stator coil 123, 121a, as well as the outer surface 121b of the poles 121 (FIG. 4B).

The outer circumferential surface 110a of the base 110 and the inner circumferential surface 121a of the pole 121 can be brought into electrical contact with the stator coil 123 and the tooth body 122 to which the stator coil 123 is directly wound. An insulating film 160 may be additionally formed (FIG. 4C).

That is, the insulating film 160 is bent and coupled to the slot, which is the space between the teeth 120, to enhance the insulating performance between the teeth 120 and the stator coil 123. The insulating film 160 can be made of a flexible polymer resin Lt; / RTI > Here, the flexible polymer resin may be a poly (ethylene terephthalate) resin or a polycarbonate (PC) resin.

The insulating coating layer 150 is formed on the outer circumferential surface 110a of the base 110 in contact with the stator coil 123 and the outer circumferential surface 110a of the pole body 121 in contact with the stator coil 123, To the both side ends 121c from the inner diameter surface 121a except for the outer diameter surface 121b (FIG. 5A).

More specifically, the outer diameter surface 121b of the pole 121 constituting the teeth 120 is a portion facing the rotor (not shown) with a constant gap, and has a very high magnetic flux density, The insulating coating layer 150 may not be formed on the outer diameter surface 121b of the pole piece 121 so that a smooth magnetic flux can be formed. Here, the contents of the insulating coating layer 150 and the insulating film 160 are the same as those described above.

As described above, the assembly of the motor stator according to the present invention can significantly reduce the volume of the portion where the coil is wound by using an insulating coating layer instead of the insulator for insulation between the stator coil and the stator core, It is possible to increase the area of the slot, which is the spacing space between the teeth.

In addition, by reducing the thickness of the portion where the coil is wound and increasing the space area of the sleeves, it is possible to increase the number of windings of the stator coil, thereby improving the performance and efficiency of the motor.

Further, in order to wind the coil on the tooth body, the length of the coil extending to the upper surface and the lower surface of the tooth body can be significantly reduced, and the height of the coil provided on the upper surface and the lower surface of the tooth body can be significantly reduced.

While the present invention has been described in detail with reference to the exemplary embodiments, it is to be understood that the present invention is not limited thereto and that the present invention is not limited thereto. It is evident that it can be modified or improved. That is, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: motor stator assembly
110: Base 120: Teeth
130: rib 150: insulated coating layer
160: Insulation film

Claims (13)

A stator core in which a stator coil is wound with a constant winding;
An insulating coating layer formed on a surface of the stator core and insulating the stator coil and the stator core from each other;
And a rib that is formed on the stator core and supports a spiral of the stator coil.
The method according to claim 1,
The stator core
A base formed in an annular shape;
And a plurality of teeth that are spaced apart from each other at a predetermined distance along a circumferential direction of the base and protrude radially outwardly and in which the stator coil is wound.
The method of claim 2,
The insulating coating layer
Wherein the base is continuously formed from a circumferential surface of the base to an end of the tooth.
The method of claim 2,
The rib
A plurality of rib grooves formed in a circumferential direction on an upper surface of the base or an upper surface of the tooth tip;
And a support member inserted in the groove and supporting a spiral of the stator coil.
The method of claim 3,
Further comprising an insulating film formed in the spacing space (slots) between the teeth.
The method of claim 2,
The tooth
A tooth body extending radially from an outer circumferential surface of the base;
And a pole piece extending from both ends of the tooth body in the circumferential direction.
The method of claim 6,
The poles
And the outer diameters of both ends of the stator assembly are smaller in the circumferential direction.
The method of claim 6,
The insulating coating layer
Wherein the base is formed continuously from an outer circumferential surface of the base to an outer circumferential surface of the poles.
The method of claim 6,
The insulating coating layer
Wherein the stator is formed continuously from an outer circumferential surface of the base to both side ends of the poles.
The method of claim 6,
The rib
A plurality of rib grooves formed in the circumferential direction on the upper surface of the base or the upper surface of the corresponding upper surface of the poles;
And a plurality of support members inserted in the rib grooves and supporting a spiral of the stator coil.
The method of claim 8,
And an insulating film formed on the outer circumferential surface of the base, the tooth body, and the inner surface of the pole.
The method of claim 8,
The insulating coating layer
A stator assembly of a motor formed from a polymer resin powder coating.
The method of claim 11,
The insulating film
Stator assembly of a motor that is a flexible polymer resin.

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