KR101153835B1 - Brushless direct current motor - Google Patents

Abstract

PURPOSE: A BLDC(Brushless Direct Current) motor forms stable matching with a cover by uniformly winding a coil wire around an upper side of a stator core. CONSTITUTION: A plurality of winding portion(20) winding a coil wire is formed inside a stator core frame(10). The winding portion includes a supporting portion having a plurality of protrusion portions(200) formed on at least one surface of an upper end and a lower end into a pair having a constant interval. An input/output portion includes a slot. A coil wire engaging groove(30) is extended from an end portion of the stator core frame. The coil wire is hung on the coil wire engaging groove on a boundary surface with the end portion. The coil wire passes through a slit of the input/output portion of the coil wire.

Description

BLDC motor {Brushless Direct Current motor}

The present invention relates to a BLDC motor, and more particularly to a winding structure for stably fixing the wire-winding of the stator assembly portion of the BLDC motor.

Conventional DC motors are economical, easy to control speed, and simple in spite of problems such as vibration and noise generated by mechanical contact between commutator and brush, dust generated by brush wear, and limited life of brushes. It has been widely used due to advantages such as ease of design by structure.

As the technology related to BLDC motor has been developed in recent years, the problems caused by the manufacture of the control device and the manufacture of the core are reduced, which enables smooth speed control of the BLDC motor and the production of BLDC motor with excellent efficiency over a wide variable speed range. As a result, BLDC motors have replaced DC motors in various fields such as compressor motors for air conditioners such as refrigerators and air conditioners, drive motors for drum washing machines, and mobile phones.

In particular, a wireless information device such as a mobile phone requires a motor having a simple structure, long life, low noise, and high reliability. Therefore, a BLDC motor of an inner rotor type is currently driven by an automatic folder drive of a mobile phone. It is widely used for automatic functions such as camera driving.

However, the conventional BLDC motor has a problem that it is difficult to wind the coil (coil) on the stator core, and therefore, the production of the coil winding jig (difficult) was difficult and complicated, and the efficiency of space utilization in the BLDC motor is not high coil Since the winding amount of is not enough, there was a problem that can not obtain the characteristics of the excellent motor.

In general, the stator core is formed in a circular shape at regular intervals with a winding portion of a “Y” shape for winding a coil wire (that is, a coated wire) inside. In addition, when winding the coil wire to the winding part, the coil wire entrance / exit is formed above the stator core to fix the coil wire.

The coil wire is wound around the winding part. When the winding operation, the coil wire wound around the winding part becomes irregular and is not balanced. In this case, the rotor rotates in the stator core, and the winding noise is generated due to the irregularly wound coil wire.

In addition, there is a disadvantage that the magnetic field is not uniform due to the irregularly wound coil wire.

In addition, the coil wire is wound and fixed through the coil wire entry and exit. When the winding is irregular, the coil wire overlaps with a double triple. In this case, when the cover is fastened to the stator core, there is no perfect match between the stator core and the cover, and the coating of the coil wire is peeled off, which causes short, corrosion, and cutting.

SUMMARY OF THE INVENTION The present invention has been proposed to overcome the problems according to the prior art, and an object thereof is to provide a BLDC motor capable of uniformly winding a coil wire in a stator core.

In addition, another object of the present invention is to provide a BLDC motor in which the coil wire is uniformly wound on the upper end side of the stator core so as to be stably matched with the cover.

The present invention provides a brushless direct current (BLDC) motor capable of winding the coil wire uniformly in order to achieve the problem posed above. The BLDC motor includes a stator core frame 10; The support part 300 is formed inside the stator core frame 10 and has a plurality of protrusions 200 formed in pairs at predetermined intervals on at least one surface of the top and bottom to wind the coil wire 40. A plurality of windings 20; And a coil wire engaging groove 30 extending from an end of the stator core frame 10 and engaging the coil wire 40 at an interface with the end, the winding being wound around the plurality of windings 20. The coil wire 40 includes a plurality of coil wire entry and exit portions 500 formed between each of the slots 510 for fixing the entry and exit of the coil wire 40.

Here, one side of the plurality of coil wire entry and exit 500 is characterized in that the guide groove 600 is formed on one side of the coil wire engaging groove 30 to guide the coil wire 40 is formed. .

In addition, the support 300 is characterized in that the inclined surface (310a, 310b) is inclined both ends of the cross section is formed.

According to the present invention, since the coil wire is uniformly wound by forming the protrusion in the stator core, it is possible to prevent the occurrence of noise due to the rotor rotating in the stator core, and the magnetic field is generated uniformly.

In addition, another effect of the present invention is to provide a guide groove on one side of the coil wire entry and exit portion of the top of the stator core so that the coil wire is uniformly wound, so that the coil wire can be matched with the cover to prevent the coil wire from peeling off. It can mention that it can prevent a short, cut | disconnect, corrosion, etc.

1 is a plan view of a stator core wound with coil wires according to an embodiment of the present invention.
2 is a perspective view of a stator core according to an embodiment of the present invention.
3 is a cross-sectional view taken along the X-X 'axis of the winding unit 20 shown in FIG.
4 is a perspective view illustrating a coil wire wound in accordance with an embodiment of the present invention.
5 is a front view of the stator core of FIG. 2.
6 is a cross-sectional view of the wire coil entry and exit unit 500 shown in FIG. 5 taken along the line Y-Y '.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" 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 other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, a brushless direct current (BLDC) motor according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a plan view of a stator core wound with coil wires according to an embodiment of the present invention. That is, it is a top view which shows the part wound by the stator assembly of a brushless direct current (BDLD) motor. will be. Referring to FIG. 1, winding portions 20 having a “Y” shape are formed at regular intervals inside a circular stator core frame 10 forming a stator outline. A coil wire 40 is wound around this winding 20, which is shown in FIG. 4.

Such winding work is generally possible by primitive manual work, but is usually done automatically in an automatic winding machine in view of productivity.

Of course, in this case, in order for the coil wire 40 to be wound around the winding part 20, the coil wire 40 is input and output as indicated by the arrow. In the upper case, the arrow in the left and right directions describes that the coil wire 40 enters the curling section 20 and the arrow in the up and down direction indicates that the coil wire 40 is the first coil wire insertion groove 50 in the curling section 20. ) To go outwards.

In the case of the arrow shown at the bottom, this is the opposite. In other words, the coil wire 40 enters the winding part 20 from the outside through the second coil wire insertion groove 11, and the arrow in the left and right directions indicates that the coil wire 40 moves out of the winding part 20. It indicates to leave.

Of course, the slot 510 and the guide groove 600 are formed, as shown in FIG. 5 will be described later.

In addition, the coil wire engaging groove 30 is formed so that the coil wire 40 is stably wound on the outer surface of the stator core frame 10. A diagram showing this is shown in FIG. 5. 5 will be described later. Due to this coil wire engaging groove 30, it is possible to continuously coil the coil wire 40 on the plurality of windings 20.

Therefore, the automatic winding machine has a jig provided with a needle leading the coil wire 40, which is an enamel coated copper wire introduced from the outside, although not shown in the drawing, while rotating around the winding part 20. It forms a complex structure that moves the needle to wind the wire.

The coil wire 40 is sequentially wound to the winding unit 20 by the automatic winding machine.

2 is a perspective view of a stator core according to an embodiment of the present invention. Referring to FIG. 2, the support part is formed inside the stator core frame 10 and the stator core frame 10 and has a plurality of protrusions 200 formed on the surface of at least one of the upper and lower ends in pairs with a predetermined interval. A number of windings 20 are shown in which 300 is configured to wind the coil wire 40. The enlarged view which expanded only this winding part 20 is shown to the right. Referring to this enlarged view, protrusions 200 which form grooves on the surface of the winding part 20 are formed at predetermined intervals in left and right pairs.

3 is a cross-sectional view taken along the X-X 'axis of the winding unit 20 shown in FIG. In other words, it is a view showing a cross section of the support portion 300 when the wound portion 20 enlarged in FIG. 2 is cut in the X-X 'axis. Referring to FIG. 3, the winding unit 20 is formed with a support unit 300 having a “工” shape to wind a coil wire. Looking at the cross section of this support part 300, both edges are removed, and the first inclined surface and the second inclined surface 310a, 310b which are obliquely formed in both edges are formed.

Of course, a plurality of protrusions 200 are formed in left and right pairs symmetrically to the surfaces of the inclined surfaces 310a and 310b.

4 is a perspective view illustrating a coil wire wound in accordance with an embodiment of the present invention. Referring to FIG. 4, the coil wire 40 is wound between the protrusions 200. Therefore, the coil wire 40 can be wound uniformly without being wound in an overlapping manner.

5 is a front view of the stator core of FIG. 2. Referring to FIG. 5, a coil wire engaging groove 30 extending from an end portion of the stator core frame 10 and engaging the coil wire 40 is formed at an interface with the end portion, so that a plurality of winding portions 20 may be formed. The coil wire 40 to be wound is fixed to enter and exit. Of course, for this purpose, a plurality of coil wire entry and exit 500 is formed, each of the coil wire entry and exit 500 is formed as a slot 510. An enlarged view showing this more clearly is shown on the left.

That is, a slot 510, which is an empty space, is formed in front of the coil wire input / output unit 500, and the slot 510 starts from the end of the stator coil frame 10 to the end of the coil wire input / output unit 500. Is formed.

6 is a cross-sectional view of the wire coil entry and exit unit 500 shown in FIG. 5 taken along the line Y-Y '. Referring to FIG. 6, a guide groove 600 having a narrower width and a deeper depth than the coil wire locking groove 30 is formed. Therefore, the coil wire 40 is inserted into the guide groove 600 to prevent the coil wire 40 from overlapping or irregularly winding.

10: Stator Core Frame
11: 2nd wire insertion groove
20: winding
30: coil wire catching groove
40: coiled wire
50: first coil wire insertion groove
60: Cover connector insert groove
70: cutting
200: protrusion
300: support
310a, 310b: slope
500: wire coil entry and exit
510: slot
600: guide groove

Claims (3)

A stator core frame 10;
The support part 300 is formed inside the stator core frame 10 and has a plurality of protrusions 200 formed in pairs at predetermined intervals on at least one surface of the top and bottom to wind the coil wire 40. A plurality of windings 20; And
The coil extending from an end of the stator core frame 10 and the coil wire engaging groove 30 is formed on the interface with the end and is wound on the windings 20. A plurality of coil wire entry and exit portions 500 having a slot 510 formed therebetween to fix the wire 40 in and out and the coil wire 40 in and out are formed therebetween.
BLDC (Brushless Direct Current) motor comprising a.
The method of claim 1,
BLDC motor, characterized in that the guide groove 600 is formed on one side of the coil wire engaging groove 30 to guide the coil wire 40 on one side of the plurality of coil wire entry and exit 500 .
The method according to claim 1 or 2,
BLDC motor, characterized in that the support portion 300 is formed with an inclined surface (310a, 310b) inclined both edges of the upper end.

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