KR102465362B1 - Motor - Google Patents

Abstract

A motor according to an embodiment includes a rotor including a plurality of permanent magnets and a plurality of first cores, a first coil positioned along an outer circumferential surface of an upper part of the rotor, a first stator surrounding the outer surface of the rotor, and the circuit A second stator disposed above or below the electrons and generating electric power by using leakage magnetic flux in an axial direction generated by rotation of the first core may be included.

Description

motor {MOTOR}

The present invention relates to a motor, and more particularly, to a motor generating counter electromotive force using magnetic flux leaking in an axial direction in a spoke type motor.

In general, a motor is a device that converts electrical energy into mechanical energy to obtain rotational force, and is widely used in electronic products and industrial machines. It is used to obtain driving force.

There are various types of motors, such as direct current, single-phase alternating current, and three-phase alternating current, depending on the electricity method supplied. Sc), and a total of 17 elements including yttrium (Y) number 39) due to the high price of magnets, research on motors using ferrite permanent magnets is being actively conducted.

However, since ferrite permanent magnets have a relatively low residual magnetic flux compared to rare earth permanent magnets, recently, a shaft has been inserted and mounted in the center of a hollow core, and a plurality of permanent magnets are installed around the shaft. A spoke type motor, which is a structure in which magnetic flux is concentrated by embedding radially, is widely used.

In general, in the case of a spoke-type motor, several slots formed so that several permanent magnets (ferrite magnets) are embedded in a radially spoke-type core coupled to a shaft, and a permanent magnet at the end of each slot of the core during high-speed rotation of the rotor It includes locking jaws formed to protrude inward from both sides so as not to be separated from the core, and several permanent magnets fixedly installed to be embedded in several slots.

In general, in the case of a spoke-type motor, it is possible to manufacture a motor having high output performance, but there is a problem in that a lot of magnetic flux leaking in the axial direction occurs due to its structural characteristics.

Therefore, a motor and a method of manufacturing the motor according to an embodiment are inventions designed to solve the above-described problems, and generate counter-electromotive force by using a separate core and coil disposed above the rotor core for leakage magnetic flux generated in the axial direction. This is to provide a motor with improved output efficiency.

A motor according to an embodiment includes a rotor including a plurality of permanent magnets and a plurality of first cores, a first coil positioned along an outer circumferential surface of an upper part of the rotor, a first stator surrounding the outer surface of the rotor, and the circuit A second stator disposed above or below the electrons and generating electric power by using leakage magnetic flux in an axial direction generated by rotation of the first core may be included.

Also, the second stator may include a second core and a second coil.

In addition, positions and angles at which the second core and the second stator are disposed may have different positions and angles based on the waveform of the counter electromotive force output by the leakage magnetic flux and the second stator.

Also, the second stator may be connected to the first coil in series or parallel form.

Also, the second stator may be disposed in a form surrounding at least a portion of an upper portion of the rotor.

In addition, the second core may be located at the center of the second stator, and the second coil may be located outside along the outer circumferential surface of the second core.

Also, the second stator may be located on an inner surface of the first coil.

In addition, the permanent magnet may include a ferrite magnet.

In addition, the motor may include a spoke type motor.

A motor according to another embodiment includes a rotor including a plurality of permanent magnets and a plurality of first cores, a first coil positioned along an outer circumferential surface of an upper part of the stator, a first stator surrounding the outer surface of the faulty element, and an upper part of the stator and It may include a second stator disposed below and generating electric power using leakage magnetic flux in an axial direction generated by rotation of the first core.

In addition, the second stator includes a second core and a second coil, and the position and angle at which the second core and the second stator are disposed are different from each other based on the waveform of counter electromotive force that can be output by the second stator. It can have a position and an angle.

In addition, the second stator disposed above the stator and the second stator disposed below the stator may be disposed at different positions and angles.

In addition, the second stator may be disposed in a form surrounding at least a portion of the upper and lower portions of the rotor.

Also, the motor may be a spoke type motor.

In the motor according to an embodiment, by disposing the stator on top of the motor, counter electromotive force can be generated using leakage of magnetic flux generated in the axial direction, thereby increasing the efficiency of the motor. It can be placed in the free space inside, so there is an effect of increasing the efficiency of the space and increasing the power density with the same volume at the same time.

In addition, in the motor according to an exemplary embodiment, the stator can be disposed at various positions inside the motor at various angles, so that counter electromotive force of a desired waveform can be generated.

1 is a view showing an external appearance of a rotor of a motor according to an embodiment.
2 is a diagram illustrating an external appearance of a stator of a motor according to an exemplary embodiment.
3 is a view showing a state in which the rotor of the motor and the stator of the motor are coupled.
4 is a view showing the appearance of magnetic flux leaking in the axial direction when the rotor rotates.
5 is a view showing a state in which a second stator is coupled to an upper portion of a rotor according to an exemplary embodiment.
6 is a view showing a state in which a second faulty device is coupled to an upper part of a rotor according to another embodiment.

The configurations shown in the embodiments and drawings described in this specification are preferred examples of the disclosed invention, and there may be various modifications that can replace the embodiments and drawings in this specification at the time of filing of the present application.

In addition, terms used in this specification are used to describe embodiments, and are not intended to limit and/or limit the disclosed invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this specification, terms such as "include", "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one Or the possibility of existence or addition of other features, numbers, steps, operations, components, parts, or combinations thereof is not excluded in advance, and ordinal numbers such as “first” and “second” used in this specification are included. Although the term can be used to describe various components, the components are not limited by the terms.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted.

In the case of the present invention, as an invention related to a motor, the type of motor to which the principles of the present invention can be applied is not limited, but for convenience of explanation, a spoke-type motor will be described below.

1 to 3 are views showing the configuration of a motor 100 according to an embodiment, specifically, FIG. 1 is a view showing the rotor 10 inside the motor 100, and FIG. 2 is It is a view showing the appearance of the stator 20 inside the motor 100, and FIG. 3 is a view showing the rotor 10 of FIG. 1, the stator 20 of FIG. 2 and the coil 30 coupled together. .

4 is a view showing the appearance of magnetic flux leaking in the axial direction when the rotor rotates. 5 and 6 are views illustrating a state in which a second stator is coupled to an upper portion of a rotor according to an embodiment.

Referring to FIG. 1 , the rotor 10 of the motor 100 according to an embodiment includes a plurality of permanent magnets 12 and a plurality of cores 11a, 11b, 11c, and 11d disposed between the permanent magnets 12. ), and the plurality of cores may include cores 11a and 11c having N-pole properties and cores 11b and 11d having S-pole properties.

In addition, the permanent magnet may include a plurality of magnets and may include a ferrite magnet as a permanent magnet.

In the stator 20 of the motor 100, a plurality of permanent magnets 21 and 22 may be arranged at regular intervals in the circumferential direction. At this time, in the plurality of permanent magnets 21 and 22, magnets 21 having N-pole properties and magnets 22 having S-pole properties may be repeatedly disposed in the circumferential direction.

Also, the rotor 10 and the stator 20 of the motor 100 may be coupled in a form in which the rotor 10 is inserted into the stator 20 as shown in FIG. 3 . The rotor 10 may rotate about a central axis within the stator 20 .

In the case of a motor according to the prior art, as shown in FIG. 4, as the rotor 10 rotates, there is a problem that magnetic flux inevitably leaks in the axial direction.

That is, since the magnetic flux is directed from the N pole to the S pole, in addition to the magnetic flux generated between the core 11 of the rotor 10 and the stator 20, the magnetic flux moves from the N pole of the core 11 to the S pole. However, since this magnetic flux is not used to generate power, there is a problem in that the efficiency of the motor is reduced.

However, in the case of the motor 100 according to an embodiment, as shown in FIG. 5, the second stator 40 is disposed above or below the rotor 10, thereby using leakage of magnetic flux generated in the axial direction. Since counter electromotive force can be produced by doing so, there is an advantage of improving the efficiency of the motor 100 .

Looking at this in detail through FIG. 5 , the motor 100 according to an embodiment includes a rotor 10 including a plurality of permanent magnets 12 and a plurality of first cores 11, along the outer circumferential surface of the upper part of the rotor. The first coil 30 disposed, the first stator 20 surrounding the outer surface of the rotor 10, and the shaft disposed above or below the rotor 10 and generated by the rotation of the first core 11 It may include a second stator 40 that generates power by using leakage magnetic flux in the direction.

At this time, the second stator 40 may include a second core 41 and a second coil 42, and the second stator 40 is connected to the first coil 30 in series or according to the purpose of use. It may be connected in a parallel form and may be located on the inner surface of the first coil 30.

Since the second stator 40 including the second core 41 and the second coil 42 is disposed above or below the rotor 10 where leakage of magnetic flux may occur, counter electromotive force is generated by using the magnetic flux. can produce

Therefore, the positions and angles at which the second core 41, which is the second stator 40, and the second stator 42 can be disposed vary based on the waveform of the counter electromotive force that can be output by the second stator 40. It can be arranged in various positions and angles. That is, as shown in FIG. 5, it may be arranged in a way to cover at least a part of the upper part of the rotor 10, but it is not limited thereto and may be arranged in various shapes.

For example, contrary to FIG. 5 , it may be disposed in a manner of enclosing at least a portion of the lower part of the rotor 10 , and may be disposed in a manner of being disposed in both the upper and lower parts of the rotor 10 .

In addition, as shown in FIG. 6, it may be arranged in such a way as to surround the entire upper part of the rotor 10, and although not shown in FIG. 6, it may cover the entire lower part of the rotor 10 or It may be arranged in such a way as to enclose both the upper and lower portions.

In addition, the second core 41 and the second coil 42 of the second stator 40 generate counter electromotive force in response to the leaking magnetic flux, and the waveform of the counter electromotive force generated at this time is generated by the second core 41 and the second coil 42. Since it varies depending on the position and angle of the two coils 42, the motor 100 according to one embodiment moves the second core 41 and the second coil 42 at various positions and at various angles according to the purpose of use. can be placed

For example, when the second core 41 and the second coil 42 are arranged in an X shape and at a Y angle, the leakage magnetic flux is the counter electromotive force generated in response to the second core 41 and the second coil 42. When the waveform is of the A shape, the second core 41 and the second coil 42 may be arranged in an X shape and a Y angle to generate an A-shaped counter electromotive force.

In addition, when the second core 41 and the second coil 42 are arranged in a Z shape and at a W angle, the waveform of the counter electromotive force generated in response to the leakage magnetic flux to the second core 41 and the second coil 42 is In the case of the B shape, the second core 41 and the second coil 42 may be arranged in a Z shape and at a W angle to generate a B-shaped counter electromotive force.

In addition, in FIG. 5, with respect to the structure of the second stator 40, the second core 41 is located at the center of the second stator 40, and the second coil 42 is located outside along the outer circumferential surface of the second core 41. Although shown as being located on the side, the positions of the second core 41 and the second stator 42 are not limited to this form, and the second core 41 and the second coil 42 in the second stator 40 The model and size of can be arranged in various shapes depending on the waveform of the back EMF required.

So far, various structures and functions of the motor 100 according to an exemplary embodiment have been studied.

In general, in the case of a spoke type motor according to the prior art, it is possible to manufacture a motor having high output performance, but due to its structural characteristics, there is a problem that a lot of magnetic flux leaking in the axial direction occurs.

However, the motor according to an embodiment can generate counter-electromotive force using leakage of magnetic flux generated in the axial direction by disposing the stator above the motor, thereby increasing the efficiency of the motor. It can be placed in the free space of the inside, so there is an effect of increasing the efficiency of the space and increasing the power density with the same volume at the same time.

In addition, in the motor according to an exemplary embodiment, the stator can be disposed at various positions inside the motor at various angles, so that counter electromotive force of a desired waveform can be generated.

Although the embodiments so far have been described with limited examples and drawings, those skilled in the art can make various modifications and variations from the above description. For example, the described techniques may be performed in an order different from the method described, and/or components of the described system, structure, device, circuit, etc. may be combined or combined in a different form than the method described, or other components may be used. Or even if it is replaced or substituted by equivalents, appropriate results can be achieved. Therefore, other embodiments and equivalents of the claims fall within the scope of the following claims.

10: rotor
11: permanent magnet
12: first core
20: first stator
30: first coil
40: 2nd stator
41: second core
42 2nd coil

Claims (14)

a rotor in which a plurality of permanent magnets and a plurality of first cores are alternately disposed in a circumferential direction and formed in a cylindrical shape;
a first stator formed to surround an outer surface of the rotor;
a first coil disposed along an outer circumferential surface of an upper portion of the rotor;
A plurality of second stators disposed inside the first coil on the top of the rotor and formed in a fan shape,
The second stator includes a second core disposed at the center and a second coil disposed outside along an outer circumferential surface of the second core. delete According to claim 1,
The second stator generates power using leakage flux in an axial direction generated by rotation of the first core,
The position and angle at which the second core and the second stator are disposed are,
A motor having different positions and angles based on waveforms of the leakage magnetic flux and counter electromotive force that can be output by the second stator. According to claim 1,
The second stator,
A motor connected in series or parallel with the first coil. delete delete According to claim 1,
The second stator is a motor located on an inner surface of the first coil. According to claim 1,
The permanent magnet is a motor including a ferrite (Ferrite) magnet. According to claim 1,
The motor includes a spoke type motor. delete delete delete delete delete

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