KR101513879B1 - Actuator using magnetic lenz effect - Google Patents

Abstract

The present invention relates to a magnetic lens type actuator. A general linear motor arranges multiple magnets in a simply same direction and installs coils corresponding thereto to form a magnetic circuit of a single direction, thereby having large power consumption and degraded efficiency. To solve the problems, the magnetic lens type actuator of the present invention comprises: upper and lower external magnets which are installed at an external yoke unit to be vertically spaced apart so that magnetic polarities of the inner circumferential surfaces thereof can be opposite to each other; a central yoke unit in which upper and lower first and second yokes are installed to have a permanent magnet installed in the middle thereof; a mover which is installed to be lifted/descended between the central yoke unit and the external magnets; and first and second coils which are vertically installed to correspond to the external magnets on the external surface of the mover, wherein coiling directions of the first and second coils are opposite to each other, and first and second central magnets are added to the inner circumferential surfaces of the first and second yokes, thereby obtaining large power with small power consumption by magnetic lens effects.

Description

[0001] The present invention relates to a magnetic lens type actuator,

More specifically, the present invention relates to a magnetic lens type actuator, and more particularly to a magnetic lens type actuator, in which a magnetic array is arranged in a vertical direction different from each other, and the moving coil is also wound in opposite directions to generate a lens effect of a magnetic path, The present invention relates to a magnetic lens type actuator.

There are several techniques for converting electrical energy into mechanical force. Rotary motion and linear motion devices are used in various industries. Although these actuators are used for industrial purposes, they are also used in human aids.

Especially, the use of exercise aids such as sick people and the elderly is increasing. However, in general, since the rotational force of the motor is converted into a linear motion, noise and vibration noise may sometimes be adversely affecting the human body.

In order to realize noiseless, no-vibration, etc., a linear motion device is required and economical structural conditions are required.

Korean Patent Laid-Open Publication No. 10-2013-0111412 discloses a cylindrical linear motor including an armature having a coil and an exciter having a permanent magnet, the armature being made of a yoke, a tooth, and a coil, . In such a general arrangement structure, the size thereof must be increased in order to exert a large force, and the power consumption is increased.

Therefore, there is a need for a high-efficiency linear actuator capable of generating a large force with low consumption efficiency.

Korean Patent Publication No. 10-2013-0111412 (Oct. 10, 2013)

In the present invention, since a general linear motor or an actuator is arranged in series and in which the magnitude and the power supply magnetic arrangement are different from each other, the moving coil is also wound in opposite directions to generate a lens effect of a magnetic path, And to provide a magnetic lens type actuator capable of realizing a magnetic lens type actuator.

In the magnetic lens type actuator according to the present invention,

An outer yoke portion constituting a housing with a side wall and a bottom wall clogged;

First and second outer magnets of a donut type which are vertically spaced apart from each other on an inner wall of the outer yoke portion;

A center yoke portion provided at the center of the bottom surface of the outer yoke portion and having a donut-shaped first inner magnet, a first yoke, a second inner magnet, a second yoke, and a third inner magnet vertically arranged from above;

A mover disposed between the central yoke and the first and second outer magnets so as to be vertically movable;

And first and second coils provided on outer surfaces of the mover in correspondence with the first and second outer magnets,

Wherein the first and second outer magnets are made of a metal,

The donut-shaped inner side magnet polarity is a permanent magnet having different upper and lower portions,

The first and second coils are connected in series in such a manner that the winding directions of the first coil and the second coil are different from each other in the clockwise direction and the counterclockwise direction corresponding to the magnet polarities of the corresponding outer magnets,

And the first center magnet and the third center magnet are installed so that magnet poles opposite to each other have opposite polarities.

Further, according to the present invention,

The central yoke portion

Wherein first and second central magnets are provided on inner side surfaces of the first yoke and the second yoke, respectively,

And the magnet polarities corresponding to the magnet polarities of the inner surfaces of the first and second outer magnets are arranged to be different from each other in polarity so as to be the outer magnet polarity of the center magnet.

According to the present invention, since the upper and lower outer magnets arranged on the yoke are arranged so as to have different inner surface polarities and the upper and lower coils provided on the mover are wound in different directions to correspond to each other, Since the opposing polarities of the outer magnets corresponding to the lower coils are different from each other due to the opposite polarity of the currents flowing in the lower coils, a magnetic force effect to obtain a force moving in the same direction in the upper and lower portions can be obtained, There is an effect.

Fig. 1 is a basic structural view of a magnetic lens type actuator according to the present invention. Fig.
2 is an explanatory diagram of a center magnetic circuit according to an embodiment of the present invention;
3 is an explanatory view of an external magnetic circuit according to the present invention;
FIG. 4 is an explanatory view of a magnetic circuit of a mover according to the present invention, and FIG. 5 is an explanatory view of a coil winding direction.
6 is a block diagram of a magnetic lens type actuator according to another embodiment of the present invention.
FIG. 7 is an explanatory view of a magnetic lens effect of a central yoke according to another embodiment of the present invention; FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a basic configuration diagram of a magnetic lens type actuator according to the present invention.

As shown therein,

An outer yoke portion 10 constituting a housing with a side wall and a bottom wall clogged;

First and second outer magnets 21 and 22 of a donut shape which are vertically spaced apart from each other on an inner wall of the outer yoke portion 10;

A first inner yoke 33, a first yoke 31, a second inner magnet 34, a second yoke 32, and a third yoke 32, which are provided at the center of the bottom surface of the outer yoke portion 10, A central yoke portion (30) in which third inner magnets (35) are vertically arranged;

A slider 40 spaced between the central yoke 30 and the first and second outer magnets 21 and 22 so as to be vertically movable;

And first and second coils 51 and 52 provided on the outer surface of the mover 40 in correspondence with the first and second outer magnets 21 and 22,

The first and second outer magnets 21,

The donut-shaped inner side magnet polarity is a permanent magnet having different upper and lower portions,

The first and second coils 51,

The winding directions of the first and second coils 51 and 52 are wound differently in the clockwise direction CW and the counterclockwise direction CCW corresponding to the magnet polarities of the corresponding outer magnets to be connected in series,

The first inner magnet (33) and the third inner magnet (35) are provided so that magnet poles opposite to each other have opposite polarities.

The central yoke portion 30 has a structure in which the first yoke 31, the second inside magnet 34, and the second yoke 32 are vertically arranged from above, and the magnetic circuit is constituted by one permanent magnet You may. However, in the embodiment, more permanent magnets are provided at the upper and lower ends to form a stronger magnetic force.

2 is an explanatory diagram of a center magnetic circuit according to an embodiment of the present invention.

The central yoke portion 30 includes a first inner magnet 33, a first yoke 31, a second inner magnet 34, a second yoke 32, and a third inner magnet 35 It is installed in a laminated structure. Here, the diameter of the first and second yokes 31 and 32 is larger than that of the first to third central magnets 33, 34 and 35.

As shown in FIG. 2, when the lower surface of the first inner magnet 33 has a polarity of "N", the upper surface of the second inner magnet 34 has a polarity of "N". Thus, the first yoke 31 forms a magnetic path of "N" polarity.

At this time, since the lower side polarity of the second inside magnet 34 becomes the "S" pole, the top side polarity of the third inside magnet 35 is set to be the "S" pole. Thus, the second yoke 32 forms a magnetic path of "S" polarity.

As a result, the first yoke 31 forms a magnetic pole of "N" pole and the second yoke 32 forms a magnetic path of an "S" pole, so that the entire central yoke portion 30 becomes a magnetic permanent magnet .

3 is an explanatory diagram of an external magnetic circuit according to the present invention.

The outer yoke portion 10 has a cylindrical structure with a bottom surface closed and has a first outer magnet 21 and a second outer magnet 22 vertically spaced from each other on an inner surface thereof.

When the central portion of the first outer magnet 21 installed on the upper portion is provided such that the center inner side surface of the donut-shaped permanent magnet has an S-pole, the second outer magnet 22 installed at the lower portion has a central portion Quot; N "polarity opposite to that of the first outer magnet 21, as shown in Fig. Accordingly, the outer yoke portion 10 is formed such that the upper portion thereof is of the "N" pole by the first outer magnet 21 and the lower portion thereof is of the "S" pole by the second outer magnet 22.

1, an upper magnetic path is formed in which the magnetic field flows in a counterclockwise direction from the first outer magnet 21 on the upper side to the second external magnet 22 on the lower side, The two magnetic paths are formed. That is, since the lower surface of the third inner magnet 35 of the central yoke portion 30 is of the "N" polarity, the second outer magnet 22 is connected to the third inner magnet 35 through the lower surface of the outer yoke portion 10, And two lower magnetic path portions passing through both lower side surfaces of the outer yoke portion 10 in contact with the second yoke 32 and flowing from the second outer magnet 22 to the second yoke 32 are formed.

Fig. 4 is an explanatory view of a magnetic circuit of the mover according to the present invention, and Fig. 5 is an explanatory view of a coil winding direction.

The first and second coils 51 and 52 are wound up and down on the outer surface of the mover 40 and the first coil 51 and the second coil 51 are wound on the outer surface of the mover 40, And the lower second coil 52 are wound so that their winding directions are opposite to each other. The upper first coil 51 is wound in the CW direction and the lower second coil 52 is wound in the CCW direction. The upper first coil 51 and the lower second coil 52 should have currents flowing in opposite directions to each other and be connected in series.

The central shaft, which is not illustrated in the drawings, is made of a non-magnetic material so as not to be influenced by the magnetic field.

In the present invention constructed as described above, the first coil 51 in the CW direction is disposed between the "S" pole of the first outer magnet 21 on the upper side and the "N" pole of the first yoke 31, When positive and negative currents are supplied to both ends of one coil 51, the mover 40 receives a force in the upward direction. That is, a magnetic path is formed as in the upper portion of FIG.

The second coil 52 is wound in the CCW direction in the direction opposite to the upper coil between the "S" pole of the lower second yoke 32 and the "N" pole of the second outer magnet 22. The second coil 52 is connected in series with the first coil 51 in a circuit. +, - is applied to the second coil 52, the first coil 51 receives a force in the upward direction in the same direction as the first coil 51.

When the direction of the current is switched to - and +, the upper first coil 51 receives the downward force and the second coil 52 also receives the downward force.

According to such a configuration of the magnetic circuit, a linear motion energy of a large force can be obtained with a small current.

Fig. 6 is a view showing a configuration of a magnetic lens type actuator according to another embodiment of the present invention. In the configuration of Fig. 1, the first yoke 31 and the second yoke 32 of the central yoke portion 30 1, and a second central magnet 61 (62). Of course, the first and second central magnets 61 and 62 are provided so as to be opposite in polarity to each other.

7 is an explanatory diagram of a magnetic lens effect of a central yoke according to another embodiment of the present invention.

In the first yoke 31, when the lower surface of the first inner magnet 33 on the upper side is of the "N" polarity, the first central magnet 61 is provided so that the outer circumferential surface thereof has an "N" polarity, The first yoke 31 can form a strong magnetic path having an "N" polarity by providing the upper surface of the second inner magnet 34 provided on the lower surface of the first yoke 31 so as to have an "N" polarity.

Similarly, when the third inside magnet 35 and the second center magnet 62 are provided so as to be polarized in the opposite direction, the second yoke 32 forms a magnetic path having an "S" polarity.

By further including the first and second central magnets 61 and 62 in the center yoke portion 30 as described above, the central yoke portion 30 is more strongly stimulated and can generate a larger force .

10: outer yoke portion 21, 22: first and second outer magnets
30: central yoke portion 31, 32: first and second yokes
33, 34, 35: first, second and third inner magnets 40:
51, 52: first and second coils 61, 62: first and second central magnets

Claims (4)

1. An actuator for generating linear motion by electric energy,
An outer yoke portion 10 constituting a housing with a side wall and a bottom wall clogged;
First and second outer magnets 21 and 22 of a donut shape which are vertically spaced apart from each other on an inner wall of the outer yoke portion 10;
A central yoke portion 30 provided at the center of the bottom surface of the outer yoke portion 10 and having a first yoke 31, a second inner magnet 34 and a second yoke 32 vertically arranged;
A slider 40 spaced between the central yoke 30 and the first and second outer magnets 21 and 22 so as to be vertically movable;
And first and second coils 51 and 52 provided on the outer surface of the mover 40 in correspondence with the first and second outer magnets 21 and 22,
The center yoke portion 30
A first center magnet 61 and a second center magnet 62 are respectively installed on the cylindrical inner side surfaces of the first yoke 31 and the second yoke 32,
Wherein the first and second central magnets (61, 62) are provided so that their outer circumferential polarities are opposite in polarity to each other.
2. The magnetic sensor according to claim 1, wherein the first and second outer magnets (21, 22)
The donut-shaped central inner side magnet polarity is a permanent magnet having different upper and lower portions,
The first and second coils 51,
And the winding directions of the first and second coils 51 and 52 are wound differently in the clockwise direction CW and the counterclockwise direction CCW in correspondence with the magnet polarities of the corresponding external magnets, And a magnetic lens.
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