KR102209820B1 - Magnetic force control device and magnetic substance holding device using the same - Google Patents

Abstract

Disclosed are a magnetic force control device improved to stably hold a magnetic substance or release holding at low power, and a magnetic substance holding device using the same. The magnetic force control device comprises: a first pole piece assembly having at least one fixing magnet and at least one first coil; a second pole piece assembly spaced from the first pole piece assembly and having at least one second coil; and a rotary magnet rotated by controlling current flowing in the first coil or the second coil to form one or more different magnetic flows with each of the first pole piece assembly and the second pole piece assembly or form one magnetic closed loop with the first pole piece assembly and the second pole piece assembly together.

Description

Magnetic force control device and magnetic material holding device using the same {MAGNETIC FORCE CONTROL DEVICE AND MAGNETIC SUBSTANCE HOLDING DEVICE USING THE SAME}

The present invention relates to a magnetic force control device configured to hold a magnetic material by controlling the magnetic force, and a magnetic material holding device using the same.

A magnetic material holding device such as a permanent magnet work-holding device is a device used to attach an attachment object composed of a magnetic material such as iron using magnetic force, and clamping the mold of today's injection molding machines. , It is widely used for clamping the mold of a press machine, and a chuck of a machine tool.

Such a magnetic material holding device attaches the magnetic body to the working surface by using the strong magnetic force of the permanent magnet when holding, and prevents the magnetic flow of the permanent magnet from forming on the working surface when the holding is released. Away from the working surface.

Conventionally, a magnetic force control device for holding and releasing the holding by changing the magnetic flow inside the device by rotation of a permanent magnet has been disclosed (see Patent Document 1).

In the magnetic force control device disclosed in Patent Document 1, the rotating permanent magnet is rotated by the current flowing through the coil. If the gap between the pole pieces is large, the power that must be supplied to the coil to rotate the rotating permanent magnet increases. There is.

In addition, when the distance between the pole pieces is small, there is a possibility that the holding is released due to the rotation of the rotating permanent magnet due to an unintended external force while the attachment object is held.

(Patent Document 1)

Korean Patent Publication No. 10-2019-0031133 (Name of invention: magnetic force control device and magnetic material holding device using the same)

An object of the present invention is to provide an improved magnetic force control device capable of stably holding or releasing a magnetic material even with a small amount of power, and a magnetic material holding device using the same.

The subject of the present invention is not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

A magnetic force control device according to an embodiment of the present invention for solving the above problem includes: a first pole piece assembly having at least one fixed magnet and at least one first coil; And, spaced apart from the first pole piece assembly A second pole piece assembly disposed and having at least one second coil; And, by rotating by controlling the current flowing through the first coil or the second coil to form at least one magnetic flow different from each of the first pole piece assembly and the second pole piece assembly, or the first pole A rotating magnet configured to form one magnetic closed loop together with the piece assembly and the second pole piece assembly; Includes.

The rotating magnet may be disposed between the first pole piece assembly and the second pole piece assembly.

The first pole piece assembly and the second pole piece assembly may be arranged to form an accommodating portion accommodating the rotating magnet.

The rotating magnet may include a plurality of N poles and S poles alternately arranged in the circumferential direction.

The rotating magnet may include a plurality of permanent magnets and a diamagnetic body disposed between the plurality of permanent magnets.

The rotation center of the rotating magnet may be disposed on the diamagnetic material.

The rotating magnet may include a plurality of permanent magnets and a diamagnetic material surrounding the plurality of permanent magnets.

The rotating magnet may include at least one permanent magnet, at least one magnetic material disposed around the at least one permanent magnet, and a diamagnetic material disposed around the at least one magnetic material.

The rotating magnet may include a first permanent magnet, a second permanent magnet spaced apart from the first permanent magnet, and a diamagnetic material disposed between the first permanent magnet and the second permanent magnet.

The rotating magnet may include a diamagnetic material disposed rotatably and at least one permanent magnet coupled to the diamagnetic material.

The rotating magnet may further include the diamagnetic material and at least one magnetic material coupled to the at least one permanent magnet.

The first pole piece assembly includes at least one first working surface, the second pole piece assembly includes at least one second working surface, and the first working surface and the first working surface are formed by rotation of the rotating magnet. It can be configured to form a magnetic flow on either of the two working surfaces.

The first pole piece assembly includes at least one first working surface, the second pole piece assembly includes at least one second working surface, and the first working surface and the first working surface are formed by rotation of the rotating magnet. It can be configured to form magnetic flow at the same time on the two working surfaces.

One part of the rotating magnet forms at least one magnetic closed loop together with one of the first pole piece assembly and the second pole piece assembly, and the other part of the rotating magnet forms the first pole piece assembly and the It may be configured to form a magnetic flow that diverges with the other of the second pole piece assemblies.

The rotating magnet may be configured to form different magnetic flows that are radiated from the first pole piece assembly and the second pole piece assembly, respectively.

In addition, the magnetic force control device according to an embodiment of the present invention includes a fixed magnet; and, a first pole piece in contact with the N pole of the fixed magnet; and a second pole piece in contact with the S pole of the fixed magnet; And, A third pole piece spaced apart from the first pole piece and the second pole piece; and a coil wound around at least one of the first pole piece and the second pole piece; And, a rotating magnet rotatably disposed between a first position and a second position other than the first position by controlling a current flowing through the coil; Including, in the state in which the rotating magnet is disposed in the first position, the fixed magnet, the rotating magnet, the first pole piece, the second pole piece and the third pole piece, one magnetic flow And, in a state in which the rotating magnet is disposed in the second position, the fixed magnet, the rotating magnet, the first pole piece, the second pole piece, and the third pole piece are at least two different magnets. It can be configured to form a flow.

The rotating magnet may include a first permanent magnet, a second permanent magnet spaced apart from the first permanent magnet, and a diamagnetic material disposed between the first permanent magnet and the second permanent magnet.

In a state in which the rotating magnet is disposed in the first position, the first permanent magnet and the second permanent magnet form a first magnetic closed loop, and in a state in which the rotating magnet is disposed in the second position, the The first permanent magnet forms a second magnetic closed loop different from the first magnetic closed loop together with the third pole piece, and the second permanent magnet is formed with the first pole piece and the second pole piece. It can be configured to form a magnetic flow.

When the rotating magnet is disposed in the second position, the fixed magnet may be configured to form a second magnetic flow different from the first magnetic flow together with the first pole piece and the second pole piece.

The first pole piece includes a first working surface provided at one end thereof, and the first working surface includes the first magnetic flow and the second magnetic flow when the rotating magnet is disposed in the second position. It is configured to form a flow, and the second pole piece includes a second working surface provided at one end thereof, and the second working surface includes the first rotating magnet in a state in which the rotating magnet is disposed in the second position. It may be configured to form a magnetic flow and the second magnetic flow.

The first working surface and the second working surface may be disposed parallel to each other.

The third pole piece may include a first sub-pole piece and a second sub-pole piece spaced apart from each other, and a connection pole piece connected to the first sub-pole piece and the second sub-pole piece.

In addition, the magnetic force control device according to an embodiment of the present invention includes a plurality of pole piece assemblies; and a coil wound around at least one of the plurality of pole piece assemblies; and, disposed between the plurality of pole piece assemblies, A rotating magnet rotatable by controlling a current flowing through the coil; Including, by the rotation of the rotating magnet, one of the plurality of pole piece assemblies may be configured to form a magnetic closed loop, the other may be configured to form a magnetic flow radiating outward.

The rotating magnet may be rotatable about a rotation axis, and the rotating magnet may include a diamagnetic material disposed on one side of the center line and a permanent magnet disposed on the other side of the center line based on a center line passing through the rotation axis. have.

In addition, the magnetic force control device according to an embodiment of the present invention includes: a first permanent magnet; and a first pole piece in contact with the N pole of the first permanent magnet; and, a first permanent magnet in contact with the S pole of the first permanent magnet. 2 pole pieces; And, a second permanent magnet rotatably disposed on the rotation path formed by the first pole piece and the second pole piece; And, a coil wound around at least one of the first pole piece and the second pole piece; And at least one bridge disposed around the first pole piece and the second pole piece and configured to magnetically guide the rotation of the second permanent magnet; It may include.

The at least one bridge may be configured to form at least a portion of the rotation path.

The at least one bridge may include two or more bridges disposed to face each other with the rotating magnet therebetween.

The at least one bridge may be disposed between the first permanent magnet and the second permanent magnet.

A magnetic material holding device according to an embodiment of the present invention includes the configuration of the magnetic force control device described above.

According to the present invention, since the magnetic body can be held by rotating the rotating magnet with little power, the operation efficiency of the magnetic force control device is improved.

In addition, since the rotating magnet is not easily rotated to another position even when an external force is applied while the magnetic material is held, the holding stability of the magnetic force control device is improved.

1A to 1D are schematic diagrams of a magnetic force control apparatus according to an embodiment of the present invention.
2A to 2D are diagrams schematically showing a magnetic force control apparatus according to another embodiment of the present invention.
3A to 3D are diagrams schematically showing a magnetic force control apparatus according to another embodiment of the present invention.
4A to 4E are views showing modified embodiments of a rotating magnet.
5A to 5C are views schematically showing a magnetic force control apparatus according to another embodiment of the present invention.

Hereinafter, various embodiments will be described in more detail with reference to the accompanying drawings. The embodiments described in this specification may be variously modified. Certain embodiments may be depicted in the drawings and described in detail in the detailed description. However, specific embodiments disclosed in the accompanying drawings are only intended to facilitate understanding of various embodiments. Therefore, the technical idea is not limited by the specific embodiments disclosed in the accompanying drawings, and it should be understood to include all equivalents or substitutes included in the spirit and scope of the invention.

In the present specification, when it is described that a certain constituent element is formed “on” another constituent element, it does not exclude the case where there is another constituent element between the certain constituent element and the other constituent element. That is, the certain component may be formed in direct contact with the other component, or another component may be interposed between the certain component and the other component.

Terms including ordinal numbers such as first and second may be used to describe various elements, but these elements are not limited by the above-described terms. The above-described terms are used only for the purpose of distinguishing one component from other components.

In the present specification, terms such as "comprises" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance. When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. Should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

Meanwhile, a "module" or "unit" for a component used in the present specification performs at least one function or operation. And, the "module" or "unit" may perform a function or operation by hardware, software, or a combination of hardware and software. In addition, a plurality of "modules" or a plurality of "units" excluding "module" or "unit" to be performed in specific hardware or performed by at least one processor may be integrated into at least one module. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In addition, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be abbreviated or omitted.

Hereinafter, embodiments of the magnetic force control apparatus of the present invention will be described with reference to the accompanying drawings.

The magnetic force control device of the present invention is a device that generates or controls magnetic force by changing magnetic properties on an action surface. The magnetic force control device of the present invention can be used comprehensively in a magnetic material holding device, a power device, and the like. Hereinafter, the magnetic force control device is described by exemplifying that it is used as a magnetic material holding device, but the use of the magnetic force control device is not limited thereto.

1A to 1D are schematic diagrams of a magnetic force control apparatus according to an embodiment of the present invention.

1A to 1D, the magnetic force control apparatus 100 according to an embodiment of the present invention includes a first pole piece assembly 110, a second pole piece assembly 120, and a rotating magnet 130. .

The first pole piece assembly 110 includes a first pole piece 111, a second pole piece 112, a first coil 114, and a fixed magnet 116.

The first pole piece 111 is made of a ferromagnetic material such as iron so as to form a magnetic flow, and includes a first action surface 111a and a first support surface 111b.

The first working surface 111a is provided at an outer end of the first pole piece 111. When a magnetic flow is formed on the first working surface 111a, an object having magnetic properties may be held on the first working surface 111a.

The first support surface 111b is provided on the inner surface of the first pole piece 111. The first support surface 111b contacts one end of the fixed magnet 116 to support the fixed magnet 116. 1A to 1D show a structure in which the first support surface 111b contacts the N pole of the fixed magnet 116, but a structure in contact with the S pole of the fixed magnet 116 may also be applied.

The second pole piece 112 is disposed spaced apart from the first pole piece 111 with the fixed magnet 116 therebetween.

The second pole piece 112 is made of a ferromagnetic material such as iron to form a magnetic flow, and includes a second action surface 112a and a second support surface 112b.

The second working surface 112a is provided at an outer end of the second pole piece 112. When a magnetic flow is formed on the second working surface 112a, an object having magnetic properties may be held on the second working surface 112a. The second working surface 112a is disposed horizontally and parallel to the first working surface 111a so that it can stably contact the object.

When magnetic flow is formed on the first and second action surfaces 111a and 112a, the object may contact the first and second action surfaces 111a and 112a, and the object is subjected to the first action. When in contact with the surface 111a and the second working surface 112a, a magnetic flow is formed together with the first working surface 111a and the second working surface 112a, and held by the magnetic force control device 100.

The second support surface 112b is provided on the inner surface of the second pole piece 112. The second support surface 112b contacts the other end of the fixed magnet 116 to support the fixed magnet 116. 1A to 1D show a structure in which the second support surface 112b contacts the S pole of the fixed magnet 116, but a structure in contact with the N pole of the fixed magnet 116 may also be applied.

The first coil 114 may be wound around at least one of the first pole piece 111 and the second pole piece 112. 1A to 1D show a structure in which the first coil 114 is wound around the second pole piece 112, but the structure in which the first coil 114 is wound around the first pole piece 111 or the first pole A structure in which both the piece 111 and the second pole piece 112 are wound can also be applied.

The first coil 114 is disposed between the fixed magnet 116 and the rotating magnet 130.

When a current flows through the first coil 114, a magnetic flow is formed in a certain direction according to Ampere's right-handed screw rule, and the second pole piece 112 wound by the first coil 114 ), the N pole and S pole are formed according to the direction of magnetic flow. That is, a portion of the first coil 114 and the second pole piece 112 wound around the first coil 114 may be viewed as a configuration that serves as an electromagnet.

The fixed magnet 116 is provided as a permanent magnet, the N pole of the fixed magnet 116 is in contact with the first pole piece 111, and the S pole of the fixed magnet 116 is in contact with the second pole piece 112 It is arranged as much as possible. The fixed magnet 116 is disposed closer to the first working surface 111a and the second working surface 112a than the rotating magnet 130.

The second pole piece assembly 120 is spaced apart from the first pole piece assembly 110. The first pole piece assembly 110 and the second pole piece assembly 120 form a receiving part 140 accommodating the rotating magnet 130. The receiving unit 140 accommodates the rotating magnet 130 and includes a rotation path P1 of the rotating magnet 130.

The second pole piece assembly 120 includes a third pole piece 120a and a second coil 124.

The third pole piece 120a includes a first sub pole piece 121, a second sub pole piece 122 and a connection pole piece 123.

The first sub pole piece 121 is made of a ferromagnetic material such as iron to form a magnetic flow.

The second sub-pole piece 122 is disposed to be spaced apart from the first sub-pole piece 121 and is made of a ferromagnetic material such as iron so as to form magnetic flow.

The connection pole piece 123 is connected to the first sub pole piece 121 and the second sub pole piece 122, respectively, and is made of a ferromagnetic material such as iron so as to form magnetic flow.

The second coil 124 may be wound around at least one of the first sub pole piece 121, the second sub pole piece 122, and the connection pole piece 123. 1A to 1D show a structure in which the second coil 124 is wound around the connection pole piece 123, but the second coil 124 is the first sub pole piece 121 or the second sub pole piece 122. ) Is also applicable. In addition, a structure in which the second coil 124 is wound around both the first sub-pole piece 121 and the second sub-pole piece 122 may also be applied.

When a current flows through the second coil 124, magnetic flow is formed in a certain direction, and the N-pole and S-pole are formed in the connection pole piece 123 wound around the second coil 124 according to the magnetic flow direction. That is, a portion of the connection pole piece 123 wound by the second coil 124 and the second coil 124 may be viewed as a configuration that serves as an electromagnet.

The rotating magnet 130 is provided in a cylindrical shape having an approximately circular cross section. The rotating magnet 130 includes a rotating shaft 132 disposed rotatably, a pair of permanent magnets 134a and 134b, and a diamagnetic body 136.

The diamagnetic body 136 is coupled to the rotation shaft 132 and is disposed rotatably together with the rotation shaft 132. The diamagnetic body 136 has a repulsive force against the magnetic field formed outside, and thus the diamagnetic body 136 does not form a magnetic flow or blocks magnetic flow.

A pair of permanent magnets 134a and 134b are respectively coupled to both sides of the diamagnetic body 136 and are disposed to be rotatable about the rotation shaft 132. A pair of permanent magnets (134a, 134b) has a circular arc shape forming the outer circumferential surface of the rotating magnet 130, so that the N and S poles can be alternately arranged along the circumferential direction of the rotating magnet 130 Combined to 136.

The rotating magnet 130 has its S pole close to the first pole piece 111 and magnetically connected to the first pole piece 111, and its N pole close to the second pole piece 112 A first position magnetically connected to the pole piece 112 (see FIG. 1A), and the N pole is magnetically connected to the first pole piece 111 in proximity to the first pole piece 111, and The S pole is disposed rotatably between the second pole piece 112 and a second position (see FIG. 1C) magnetically connected to the second pole piece 112 in proximity to the second pole piece 112.

The rotating magnet 130 is disposed between the first pole piece assembly 110 and the second pole piece assembly 120, and according to the position where the rotating magnet 130 is rotated and disposed, the rotating magnet 130 is the first The pole piece assembly 110 and the second pole piece assembly 120 may be magnetically connected, or the first pole piece assembly 110 and the second pole piece assembly 120 may be magnetically separated.

In a state in which the first pole piece assembly 110 and the second pole piece assembly 120 are magnetically separated, the rotating magnet 130 is separated from the first pole piece assembly 110 and the second pole piece assembly 120, respectively. They can be magnetically connected to form different magnetic flows.

That the rotating magnet 130 is "magnetically connected" with the first pole piece assembly 110 or the second pole piece assembly 120 means that the rotating magnet 130 is the first pole piece assembly 110 or 2 Even if there is no direct or physical contact with the pole piece assembly 120, the rotating magnet 130 is spaced apart enough to form a magnetic flow in the first pole piece assembly 110 or the second pole piece assembly 120. Includes that.

For example, compared to the strength of the magnetic flow generated when the rotating magnet 130 contacts the first pole piece assembly 110 or the second pole piece assembly 120, the magnetic flow having an intensity of A% or more is the first When formed in the pole piece assembly 110 or the second pole piece assembly 120, the rotating magnet 130 and the first pole piece assembly 110 or the second pole piece assembly 120 are said to be magnetically connected. I can. Here, A may be 80, 70, 60, 50, 40, 30, 20, and the like.

Hereinafter, with reference to FIGS. 1A to 1D again, the principle of holding or releasing the object 1, which is a magnetic object, will be described.

First, referring to FIG. 1A, when power is not applied to the first coil 114 and the second coil 124 and no current flows, the first pole piece 111 in contact with the N pole of the fixed magnet 116 In, the portion adjacent to the N pole of the fixed magnet 116 is magnetized to the S pole, and the portion relatively far from the N pole of the fixed magnet 116, that is, the portion adjacent to the rotating magnet 130 is magnetized to the N pole.

On the contrary, in the second pole piece 112 in contact with the S pole of the fixed magnet 116, the portion adjacent to the S pole of the fixed magnet 116 is magnetized to the N pole and is relatively far from the S pole of the fixed magnet 116. A portion, that is, a portion adjacent to the rotating magnet 130 is magnetized to the S pole.

The rotating magnet 130 has its S pole close to the first pole piece 111 and magnetically connected to the first pole piece 111, and its N pole close to the second pole piece 112 The pole piece 112 is disposed to rotate to a first position magnetically connected.

As described above, since the diamagnetic material 136 is disposed between the pair of permanent magnets 134a and 134b in the rotating magnet 130, a magnetic flow can be formed between the pair of permanent magnets 134a and 134b. none. Therefore, when the rotating magnet 130 is rotated and disposed in the first position, as shown in the dotted line shown in FIG. 1A, the first pole piece 111, the rotating magnet 130, the third pole piece 120a, and the rotating magnet ( 130), a magnetic closed loop is formed along the second pole piece 112 and the fixed magnet 116.

In a state in which the rotating magnet 130 is rotated and disposed in the first position, since magnetic flow is not formed in the direction toward the first and second operation surfaces 111a and 112a, the object 1 is It cannot be held on the first working surface 111a and the second working surface 112a.

When the first coil 114 and the second coil 124 are controlled so that current flows through the first coil 114 and the second coil 124 as shown in FIG. 1B, the second pole piece 112 An S pole is formed in a portion adjacent to the second working surface 112a of the second pole piece 112, and an N pole is formed in a portion adjacent to the rotating magnet 130 of the second pole piece 112. In addition, an S pole is formed in a portion of the second sub-pole piece 122 adjacent to the rotating magnet 130, and an N pole is formed in a portion of the first sub-pole piece 121 adjacent to the rotating magnet 130.

When sufficient current flows in the first coil 114 and the second coil 124, the rotating magnet 130 receives repulsive force from the second pole piece 112 and the third pole piece 120a, respectively, and the rotating magnet 130 will rotate.

When the rotating magnet 130 is rotated 90 degrees from the first position and disposed in the second position as shown in FIG. 1C, the rotating magnet 130 has its N pole close to the first pole piece 111 and the first It is magnetically connected to the pole piece 111, and the S pole is magnetically connected to the second pole piece 112 in proximity to the second pole piece 112.

In addition, the other N pole of the rotating magnet 130 is magnetically connected to the second sub pole piece 122 in proximity to the second sub pole piece 122, and the other S pole of the rotating magnet 130 is the first It is magnetically connected to the first sub-pole piece 121 in proximity to the sub-pole piece 121.

In the rotating magnet 130, since the diamagnetic body 136 is disposed between the pair of permanent magnets 134a and 134b, magnetic flow cannot be formed between the pair of permanent magnets 134a and 134b. Therefore, when the rotating magnet 130 is rotated and placed in the second position, the second permanent magnet 134b of the rotating magnet 130 forms one magnetic flow with the first pole piece assembly 110, and the rotating magnet The first permanent magnet 134a of 130 forms a magnetic flow different from the second pole piece assembly 120. The magnetic flow formed by the first permanent magnet 134a and the second pole piece assembly 120 forms a magnetic closed loop.

With the rotating magnet 130 disposed in the second position, a magnetic flow is formed on the first and second working surfaces 111a and 112a, and this magnetic flow forms a magnetic closed loop together with other magnetic materials. Can be formed. That is, the magnetic flow is diverged through the first working surface 111a or the second working surface 112a. Herein, "the divergence of magnetic flow" means when magnetic flow is formed from the first working surface 111a or the second working surface 112a to the outside and the first working surface 111a or the second working surface ( It includes all cases where magnetic flow is formed toward 112a).

Therefore, when the magnetic object 1 comes into contact with the first and second action surfaces 111a and 112a, the object 1 is rotated together with the rotating magnet 130 and the first pole piece assembly 110. As shown in 1C, a magnetic closed loop is formed, and is held by the magnetic force control device 100 through the first and second action surfaces 111a and 112a.

In addition, when the rotating magnet 130 is disposed in the second position, the fixed magnet 116 cannot form a magnetic flow with the rotating magnet 130, thus forming another magnetic closed loop together with the object 1 Is done.

When the magnetic closed loops as shown in FIG. 1C are formed, the magnetic closed loops are maintained even when the voltage applied to the first coil 114 and the second coil 124 is removed, so that the holding of the object 1 is maintained. do.

In this way, the rotating magnet 130 is disposed between the first pole piece assembly 110 and the second pole piece assembly 120 spaced apart from each other, and the rotating magnet 130 is disposed in the second position. Since 130 forms separate magnetic closed loops from the first pole piece assembly 110 and the second pole piece assembly 120, respectively, the object 1 is intended to be held in the magnetic force control device 100 Even if an external force that is not applied is applied, the holding can be stably maintained.

In order to release the holding of the object 1, voltage may be applied to the first coil 114 and the second coil 124 as shown in FIG. 1D. That is, when the first coil 114 and the second coil 124 are controlled so that the current flows in a direction opposite to the direction of the current shown in FIG. 1B, the second action surface 112a of the second pole piece 112 ) And an N pole is formed at a portion adjacent to the second pole piece 112, and an S pole is formed at a portion adjacent to the rotating magnet 130 of the second pole piece 112. In addition, an N-pole is formed at a portion of the second sub-pole piece 122 adjacent to the rotating magnet 130, and an S-pole is formed at a portion of the first sub-pole piece 121 adjacent to the rotating magnet 130.

When sufficient current flows in the first coil 114 and the second coil 124, the rotating magnet 130 receives repulsive force from the second pole piece 112 and the third pole piece 120a, respectively, and the rotating magnet 130 will rotate. Accordingly, the magnetic flow on the first and second operating surfaces 111a and 112a is removed, and the holding of the object 1 is released, so that the object 1 can be separated from the magnetic force control device 100.

When the rotating magnet 130 rotates 90 degrees in the second position and is disposed in the first position as shown in FIG. 1A, the rotating magnet 130 has its S pole close to the first pole piece 111 and the first It is magnetically connected to the pole piece 111, and the N pole is magnetically connected to the second pole piece 112 in proximity to the second pole piece 112.

In addition, the other N pole of the rotating magnet 130 is magnetically connected to the first sub pole piece 121 in proximity to the first sub pole piece 121, and the other S pole of the rotating magnet 130 is a second It is magnetically connected to the second sub-pole piece 122 in proximity to the sub-pole piece 122.

When the rotating magnet 130 is placed in the first position, the first pole piece 111, the rotating magnet 130, the third pole piece 120a, the rotating magnet 130, the second pole piece 112 and fixed One magnetic closed loop is formed along the magnet 116.

When the magnetic closed loop as shown in FIG. 1A is formed, even when the voltage applied to the first coil 114 and the second coil 124 is removed, the first working surface 111a and the second working surface 112a Since the magnetic closed loop is maintained with the magnetic flow of the image removed, the object 1 is not held by the magnetic force control device 100.

Since the rotational direction of the rotating magnet 130 shown in FIGS. 1B and 1D is exemplary, the rotating magnet 130 may be rotated in a direction different from the rotational direction of the rotating magnet 130 shown in FIGS. 1B and 1D. . In other embodiments described below, the rotation direction of the rotating magnet 130 is only an example.

As such, by controlling the current flowing through the first coil 114 and the second coil 124, the rotating magnet 130 is rotated and disposed between the first position or the second position, and the rotation of the rotating magnet 130 and Magnetic force on the first and second action surfaces 111a and 112a may be controlled by the arrangement.

2A to 2D are diagrams schematically showing a magnetic force control apparatus according to another embodiment of the present invention.

2A to 2D, a magnetic force control device 200 according to another embodiment of the present invention includes a first pole piece assembly 210, a second pole piece assembly 220, and a rotating magnet 230. .

The first pole piece assembly 210 includes a first pole piece 211, a second pole piece 212, a first coil 214, and a first fixed magnet 216.

The first pole piece 211 is made of a ferromagnetic material such as iron so as to form a magnetic flow, and includes a first action surface 211a and a first support surface 211b.

The first working surface 211a is provided at an outer end of the first pole piece 211. When a magnetic flow is formed on the first working surface 211a, an object having a magnetic property may contact the first working surface 211a.

The first support surface 211b is provided on the inner surface of the first pole piece 211. The first support surface 211b contacts one end of the first fixed magnet 216 to support the first fixed magnet 216. 2A to 2D show a structure in which the first support surface 211b contacts the N pole of the first fixed magnet 216, but a structure in contact with the S pole of the first fixed magnet 216 can also be applied. Do.

The second pole piece 212 is spaced apart from the first pole piece 211 with the first fixed magnet 216 interposed therebetween.

The second pole piece 212 is made of a ferromagnetic material such as iron so as to form a magnetic flow, and includes a second action surface 212a and a second support surface 212b.

The second working surface 212a is provided at an outer end of the second pole piece 212. When a magnetic flow is formed on the second working surface 212a, an object having magnetic properties may be held on the second working surface 212a. The second working surface 212a is disposed horizontally and parallel to the first working surface 211a so as to stably contact the object.

When magnetic flow is formed on the first and second action surfaces 211a and 212a, the object may contact the first action surface 211a and the second action surface 212a, and the object is subjected to the first action. When in contact with the surface 211a and the second working surface 212a, a magnetic flow is formed together with the first working surface 211a and the second working surface 212a, and held by the magnetic force control device 200.

The second support surface 212b is provided on the inner surface of the second pole piece 212. The second support surface 212b contacts the other end of the first fixed magnet 216 to support the first fixed magnet 216. 2A to 2D show a structure in which the second support surface 212b contacts the S pole of the first fixed magnet 216, but a structure in contact with the N pole of the first fixed magnet 216 can also be applied. Do.

The first coil 214 may be wound around at least one of the first pole piece 211 and the second pole piece 212. 2A to 2D show a structure in which the first coil 214 is wound around the second pole piece 212, but the structure in which the first coil 214 is wound around the first pole piece 211 or the first pole A structure in which both the piece 211 and the second pole piece 212 are wound can also be applied.

The first coil 214 is disposed between the first fixed magnet 216 and the rotating magnet 230.

When a current flows through the first coil 214, a magnetic flow is formed in a certain direction according to Ampere's right-handed screw rule, and the second pole piece 212 wound by the first coil 214 ), the N pole and S pole are formed according to the direction of magnetic flow. That is, a portion of the first coil 214 and the second pole piece 212 wound around the first coil 214 may be viewed as a configuration that serves as an electromagnet.

The first fixed magnet 216 is provided as a permanent magnet, the N pole of the first fixed magnet 216 is in contact with the first pole piece 211, and the S pole of the first fixed magnet 216 is a second pole. It is arranged to be in contact with the piece 212. The first fixed magnet 216 is disposed closer to the first working surface 211a and the second working surface 212a than the rotating magnet 230.

The second pole piece assembly 220 is spaced apart from the first pole piece assembly 210. The first pole piece assembly 210 and the second pole piece assembly 220 form a receiving part 240 accommodating the rotating magnet 230. The receiving unit 240 accommodates the rotating magnet 230 and includes a rotation path P2 of the rotating magnet 230.

The second pole piece assembly 220 includes a third pole piece 221, a fourth pole piece 222, a second coil 224, and a second fixed magnet 226.

The third pole piece 221 is made of a ferromagnetic material such as iron so as to form a magnetic flow, and includes a third action surface 221a and a third support surface 221b.

The third working surface 221a is provided at an outer end of the third pole piece 221. When a magnetic flow is formed on the third working surface 221a, an object having magnetic properties may be held on the third working surface 221a.

The third support surface 221b is provided on the inner surface of the third pole piece 221. The third support surface 221b contacts one end of the second fixed magnet 226 to support the second fixed magnet 226. 2A to 2D show a structure in which the third support surface 221b contacts the N pole of the second fixed magnet 226, but a structure in contact with the S pole of the second fixed magnet 226 can also be applied. Do.

The fourth pole piece 222 is spaced apart from the third pole piece 221 with the second fixed magnet 226 interposed therebetween.

The fourth pole piece 222 is made of a ferromagnetic material such as iron to form a magnetic flow, and includes a fourth action surface 222a and a fourth support surface 222b.

The fourth working surface 222a is provided at an outer end of the fourth pole piece 222. When magnetic flow is formed on the fourth working surface 222a, an object having magnetic properties may be held on the fourth working surface 222a. The fourth working surface 222a is disposed horizontally and parallel to the third working surface 221a so that it can stably contact the object.

When magnetic flow is formed on the third and fourth action surfaces 221a and 222a, the object may contact the third action surface 221a and the fourth action surface 222a, and the object is subjected to a third action. When contacting the surface 221a and the fourth working surface 222a, a magnetic flow is formed together with the third working surface 221a and the fourth working surface 222a, and held by the magnetic force control device 200.

The fourth support surface 222b is provided on the inner surface of the fourth pole piece 222. The fourth support surface 222b contacts the other end of the second fixed magnet 226 to support the second fixed magnet 226. 2A to 2D show a structure in which the fourth support surface 222b contacts the S pole of the second fixed magnet 226, but a structure in contact with the N pole of the second fixed magnet 226 can also be applied. Do.

The second coil 224 may be wound around at least one of the third pole piece 221 and the fourth pole piece 222. 2A to 2D show a structure in which the second coil 224 is wound around the fourth pole piece 222, but the structure in which the second coil 224 is wound around the third pole piece 221 or a third pole A structure in which both the piece 221 and the fourth pole piece 222 are wound is also applicable.

The second coil 224 is disposed between the second fixed magnet 226 and the rotating magnet 230.

When a current flows through the second coil 224, magnetic flow is formed in a certain direction according to Ampere's right-handed screw rule, and the fourth pole piece 222 wound by the second coil 224 ), the N pole and S pole are formed according to the direction of magnetic flow. That is, a part of the fourth pole piece 222 wound by the second coil 224 and the second coil 224 may be viewed as a configuration that serves as an electromagnet.

The second fixed magnet 226 is provided as a permanent magnet, the N pole of the second fixed magnet 226 is in contact with the third pole piece 221, and the S pole of the second fixed magnet 226 is a fourth pole. It is arranged to be in contact with the piece 222. The second fixed magnet 226 is disposed closer to the third working surface 221a and the fourth working surface 222a than the rotating magnet 230.

The rotating magnet 230 is provided in a cylindrical shape having an approximately circular cross section. The rotating magnet 230 includes a rotating shaft 232 disposed rotatably, a pair of permanent magnets 234a and 234b, and a diamagnetic body 236.

The diamagnetic body 236 is coupled to the rotation shaft 232 and is disposed rotatably together with the rotation shaft 232. The diamagnetic body 236 has a repulsive force against the magnetic field formed outside, and thus the diamagnetic body 236 does not form magnetic flow or blocks magnetic flow.

A pair of permanent magnets 234a and 234b are respectively coupled to both sides of the diamagnetic body 236 and are arranged to be rotatable around the rotation shaft 232. The pair of permanent magnets 234a and 234b has an arc shape forming the outer circumferential surface of the rotating magnet 230, and is coupled to the diamagnetic material 236 in a structure having the same polarity facing each other with the diamagnetic material 236 interposed therebetween .

The rotating magnet 230 is magnetically connected to the first pole piece 211 by the N pole of the first permanent magnet 234a close to the first pole piece 211, and the S of the first permanent magnet 234a The first position (see FIG. 2B) where the pole is close to the second pole piece 212 and magnetically connected to the second pole piece 212 and the S pole of the first permanent magnet 234a are the fourth pole piece. It is magnetically connected to the fourth pole piece 222 in proximity to the 222, and the N pole of the first permanent magnet 234a is close to the third pole piece 221, It is arranged to be rotatable between the second positions (see Fig. 2D) that are connected to each other.

In a state in which the rotating magnet 230 is disposed in the first position, the N pole of the second permanent magnet 234b is magnetically connected to the fourth pole piece 222 in proximity to the fourth pole piece 222, The S pole of the second permanent magnet 234b is magnetically connected to the third pole piece 221 in proximity to the third pole piece 221.

In a state in which the rotating magnet 230 is disposed at the second position, the S pole of the second permanent magnet 234b is magnetically connected to the first pole piece 211 in proximity to the first pole piece 211, The N pole of the second permanent magnet 234b is magnetically connected to the second pole piece 212 in proximity to the second pole piece 212.

The rotating magnet 230 is disposed between the first pole piece assembly 210 and the second pole piece assembly 220, and depending on the position where the rotating magnet 230 is rotated, a pair of permanent magnets 234a One of 234b) forms a magnetic closed loop with the first pole piece assembly 210, and the other forms a magnetic closed loop with the second pole piece assembly 220.

That is, the first pole piece assembly 210 and the second pole piece assembly 220 are always magnetically separated, and the rotating magnet 230 is the first pole piece assembly 110 and the second pole piece assembly 120 ) And each are magnetically connected to form different magnetic flows.

Hereinafter, with reference to FIGS. 2A to 2D again, a principle of holding or releasing the object 1, which is a magnetic object, will be described.

When the first coil 214 and the second coil 224 are controlled so that current flows through the first coil 214 and the second coil 224 as shown in FIG. 2A, the second pole piece 212 An S pole is formed in a portion adjacent to the second working surface 212a of the second pole piece 212, and an N pole is formed in a portion adjacent to the rotating magnet 230 of the second pole piece 212. In addition, an S pole is formed at a portion of the fourth pole piece 222 adjacent to the rotating magnet 230, and an N pole is formed at a portion adjacent to the fourth action surface 222a of the fourth pole piece 222.

When a sufficient current flows through the first coil 214 and the second coil 224, the rotating magnet 230 receives repulsive force from the second pole piece 212 and the fourth pole piece 222, respectively, and the rotating magnet 230 will rotate.

When the rotating magnet 230 rotates in the position shown in FIG. 2A and is disposed in the first position as shown in FIG. 2B, as shown in the dotted line shown in FIG. 2B, the first permanent magnet 234a of the rotating magnet 230 ) Forms one magnetic flow with the first pole piece assembly 210, and the second permanent magnet 234b of the rotating magnet 230 forms a magnetic flow different from the second pole piece assembly 220. . The magnetic flow formed by the second permanent magnet 234b and the second pole piece assembly 220 forms a magnetic closed loop.

The N pole of the first permanent magnet 234a of the rotating magnet 230 is magnetically connected to the first pole piece 211, and the S pole of the first permanent magnet 234a is connected to the second pole piece 212 Magnetically connected.

The N pole of the second permanent magnet 234b of the rotating magnet 230 is magnetically connected to the fourth pole piece 222, and the S pole of the second permanent magnet 234b is connected to the third pole piece 221 Magnetically connected.

With the rotating magnet 230 disposed in the first position, a magnetic flow is formed on the first and second operation surfaces 211a and 212a, and this magnetic flow forms a magnetic closed loop together with other magnetic materials. Can be formed. That is, magnetic flow is diverged through the first working surface 211a or the second working surface 212a. Therefore, when the magnetic object 1 comes into contact with the first and second action surfaces 211a and 212a, the object 1 is rotated together with the rotating magnet 230 and the first pole piece assembly 210. As shown in 2B, a magnetic closed loop is formed, and is held by the magnetic force control device 200 through the first and second action surfaces 211a and 212a.

In addition, in a state in which the rotating magnet 230 is disposed in the first position, the first fixed magnet 216 cannot form a magnetic flow with the rotating magnet 230, and thus another magnetic closed loop together with the object 1 Will form.

When the magnetic closed loops as shown in FIG. 2B are formed, the magnetic closed loops are maintained even when the voltage applied to the first coil 214 and the second coil 224 is removed, so that the holding of the object 1 is maintained. do.

As described above, in a state in which the rotating magnet 230 is disposed in the first position, the rotating magnet 230 forms a magnetic closed loop with the second pole piece assembly 220, so that the third action surface 221a and Magnetic flow is not formed in the direction toward the fourth working surface 222a, and the object 1 cannot be held in the second pole piece assembly 220.

As shown in FIG. 2C, when the first coil 214 and the second coil 224 are controlled so that current flows in a direction opposite to the direction of the current shown in FIG. 2A, the second action of the second pole piece 212 An N pole is formed at a portion adjacent to the surface 212a, and an S pole is formed at a portion adjacent to the rotating magnet 230 of the second pole piece 212. In addition, an N pole is formed at a portion of the fourth pole piece 222 adjacent to the rotating magnet 230, and an S pole is formed at a portion adjacent to the fourth action surface 222a of the fourth pole piece 222.

When a sufficient current flows through the first coil 214 and the second coil 224, the rotating magnet 230 receives repulsive force from the second pole piece 112 and the fourth pole piece 222, respectively, and the rotating magnet 230 will rotate.

When the rotating magnet 230 is rotated 180 degrees from the first position and placed in the second position as shown in FIG. 2D, as shown in the dotted line shown in FIG. 2D, the first permanent magnet 234a of the rotating magnet 230 The second pole piece assembly 220 and one magnetic flow is formed, and the second permanent magnet 234b of the rotating magnet 230 forms a magnetic flow different from the first pole piece assembly 210. . The magnetic flow formed by the second permanent magnet 234b and the first pole piece assembly 210 forms a magnetic closed loop.

The N pole of the first permanent magnet 234a of the rotating magnet 230 is magnetically connected to the third pole piece 221, and the S pole of the first permanent magnet 234a is the fourth pole piece 222 and Magnetically connected.

The S pole of the second permanent magnet 234b of the rotating magnet 230 is magnetically connected to the first pole piece 211, and the N pole of the second permanent magnet 234b is the second pole piece 212 and Magnetically connected.

With the rotating magnet 230 disposed in the second position, a magnetic flow is formed on the third and fourth operating surfaces 221a and 222a, and this magnetic flow forms a magnetic closed loop together with other magnetic materials. Can be formed. That is, the magnetic flow is diverged through the third working surface 221a or the fourth working surface 222a. Therefore, when the object 1 having a magnetism comes into contact with the third and fourth action surfaces 221a and 222a, the object 1 is rotated together with the rotating magnet 230 and the second pole piece assembly 220. As shown in 2D, a magnetic closed loop is formed, and is held by the magnetic force control device 200 through the third and fourth action surfaces 221a and 222a.

In addition, in a state in which the rotating magnet 230 is disposed in the second position, the second fixed magnet 226 cannot form a magnetic flow with the rotating magnet 230, so another magnetic closed loop together with the object 1 Will form.

When the magnetic closed loops as shown in FIG. 2D are formed, the magnetic closed loops are maintained even when the voltage applied to the first coil 214 and the second coil 224 is removed, so that the holding of the object 1 is maintained. do.

As described above, in a state in which the rotating magnet 230 is disposed in the second position, the rotating magnet 230 forms a magnetic closed loop with the first pole piece assembly 210, so that the first working surface 211a and Magnetic flow is not formed in the direction toward the second working surface 212a, and the object 1 cannot be held in the first pole piece assembly 210.

In this way, the rotating magnet 230 is disposed between the first pole piece assembly 210 and the second pole piece assembly 220 spaced apart from each other, and the rotating magnet 230 is disposed in the first position or the second position. In the state, since the rotating magnet 230 forms a magnetic closed loop separate from each of the first pole piece assembly 210 and the second pole piece assembly 220, the object 1 is held by the magnetic force control device 200 The holding can be stably maintained even if an unintended external force is applied in the state.

As shown in FIG. 2A, when the first coil 214 and the second coil 224 are controlled so that current flows in a direction opposite to the direction of the current shown in FIG. 2C, the second action of the second pole piece 212 An S pole is formed at a portion adjacent to the surface 212a, and an N pole is formed at a portion adjacent to the rotating magnet 230 of the second pole piece 212. In addition, an S pole is formed at a portion of the fourth pole piece 222 adjacent to the rotating magnet 230, and an N pole is formed at a portion adjacent to the fourth action surface 222a of the fourth pole piece 222.

When a sufficient current flows through the first coil 214 and the second coil 224, the rotating magnet 230 receives repulsive force from the second pole piece 112 and the fourth pole piece 222, respectively, and the rotating magnet 230 will rotate.

When the rotating magnet 130 rotates 180 degrees from the second position and is again placed in the first position, as shown in FIG. 2B, the object 1 having a magnetism can be held by the first pole piece assembly 210. And may be separated from the second pole piece assembly 220.

As such, the magnetic force control device 200 according to another embodiment of the present invention includes the first pole piece assembly 210 and the second pole piece assembly 220 having the same structure, and the rotating magnet 230 rotates. The object 1 is held in one of the first pole piece assembly 210 and the second pole piece assembly 220, and the object 1 is not held in the other according to the position at which it is arranged.

3A to 3D are diagrams schematically showing a magnetic force control apparatus according to another embodiment of the present invention.

The magnetic force control apparatus 300 disclosed in FIGS. 3A to 3D includes the arrangement positions of the N and S poles of the fixed magnets 216 and 226 in the magnetic force control apparatus 200 disclosed in FIGS. 2A to 2D and a rotating magnet ( 230) is an embodiment in which only the arrangement position between the pair of permanent magnets 234a and 234b is reversed.

Accordingly, the components included in the magnetic force control apparatus 300 disclosed in FIGS. 3A to 3D apply the same reference numerals as those included in the magnetic force control apparatus 200 disclosed in FIGS. 2A to 2D, and detailed descriptions thereof will be omitted.

Hereinafter, referring again to FIGS. 3A to 3D, the principle of holding or releasing the object 1, which is a magnetic object, will be described.

When the first coil 214 and the second coil 224 are controlled so that current flows through the first coil 214 and the second coil 224 as shown in FIG. 3A, the second pole piece 212 An N pole is formed in a portion adjacent to the second working surface 212a of the second pole piece 212, and an S pole is formed in a portion adjacent to the rotating magnet 230 of the second pole piece 212. In addition, an S pole is formed at a portion of the fourth pole piece 222 adjacent to the rotating magnet 230, and an N pole is formed at a portion adjacent to the fourth action surface 222a of the fourth pole piece 222.

When a sufficient current flows through the first coil 214 and the second coil 224, the rotating magnet 230 receives repulsive force from the second pole piece 212 and the fourth pole piece 222, respectively, and the rotating magnet 230 will rotate.

When the rotating magnet 230 rotates in the position shown in FIG. 3A and is disposed in the first position as shown in FIG. 3B, as shown in the dotted line shown in FIG. 3B, the first permanent magnet 234a of the rotating magnet 230 ) Forms one magnetic flow with the first pole piece assembly 210, and the second permanent magnet 234b of the rotating magnet 230 forms a magnetic flow different from the second pole piece assembly 220 do.

The N pole of the first permanent magnet 234a of the rotating magnet 230 is magnetically connected to the second pole piece 212, and the S pole of the first permanent magnet 234a is connected to the first pole piece 211 Magnetically connected.

The N pole of the second permanent magnet 234b of the rotating magnet 230 is magnetically connected to the fourth pole piece 222, and the S pole of the second permanent magnet 234b is connected to the third pole piece 221 Magnetically connected.

With the rotating magnet 230 disposed in the first position, a magnetic flow is formed on the first and second operation surfaces 211a and 212a, and this magnetic flow forms a magnetic closed loop together with other magnetic materials. Can be formed. That is, magnetic flow is diverged through the first working surface 211a or the second working surface 212a. Therefore, when the magnetic object 1a comes into contact with the first and second action surfaces 211a and 212a, the object 1a is drawn together with the rotating magnet 230 and the first pole piece assembly 210. As shown in 3B, a magnetic closed loop is formed, and is held by the magnetic force control device 300 through the first and second operation surfaces 211a and 212a.

In the state where the rotating magnet 230 is disposed in the first position, the first fixed magnet 216 cannot form magnetic flow with the rotating magnet 230, thus forming another magnetic closed loop with the object 1a. Is done.

In addition, with the rotating magnet 230 disposed in the first position, a magnetic flow is also formed on the third and fourth working surfaces 221a and 222a, and this magnetic flow is magnetically closed together with other magnetic bodies. It becomes possible to form a loop. That is, the magnetic flow is diverged through the third working surface 221a or the fourth working surface 222a. Therefore, when the magnetic object 1b comes into contact with the third and fourth action surfaces 221a and 222a, the object 1b is drawn together with the rotating magnet 230 and the second pole piece assembly 220. As shown in 3B, a magnetic closed loop is formed, and is held by the magnetic force control device 300 through the third and fourth action surfaces 221a and 222a.

In the state in which the rotating magnet 230 is disposed in the first position, the second fixed magnet 226 cannot form magnetic flow with the rotating magnet 230, thus forming another magnetic closed loop with the object 1b. Is done.

When the magnetic closed loops as shown in FIG. 3B are formed, since the magnetic closed loops are maintained even when the voltage applied to the first coil 214 and the second coil 224 is removed, the objects 1a and 1b Holding is maintained.

As such, the rotating magnet 230 is disposed between the first pole piece assembly 210 and the second pole piece assembly 220 spaced apart from each other, and the rotating magnet 230 is disposed in the first position. Since 230 forms separate magnetic closed loops from the first pole piece assembly 210 and the second pole piece assembly 220, respectively, the object 1 is intended to be held in the magnetic force control device 200 Even if an external force that is not applied is applied, the holding can be stably maintained.

As shown in FIG. 3C, when the first coil 214 and the second coil 224 are controlled so that current flows in a direction opposite to the direction of the current shown in FIG. 3A, the second action of the second pole piece 212 An S pole is formed at a portion adjacent to the surface 212a, and an N pole is formed at a portion adjacent to the rotating magnet 230 of the second pole piece 212. In addition, an N pole is formed at a portion of the fourth pole piece 222 adjacent to the rotating magnet 230, and an S pole is formed at a portion adjacent to the fourth action surface 222a of the fourth pole piece 222.

When a sufficient current flows through the first coil 214 and the second coil 224, the rotating magnet 230 receives repulsive force from the second pole piece 212 and the fourth pole piece 222, respectively, and the rotating magnet 230 will rotate.

When the rotating magnet 230 is rotated 90 degrees from the first position and placed in the second position as shown in FIG. 3D, as shown in the dotted line shown in FIG. 3D, the rotating magnet 230 is the first pole piece assembly 210 ) And the second pole piece assembly 220 to form one magnetic closed loop.

The N pole of the first permanent magnet 234a of the rotating magnet 230 is magnetically connected to the third pole piece 221, and the S pole of the first permanent magnet 234a is the second pole piece 212 and Magnetically connected.

The S pole of the second permanent magnet 234b of the rotating magnet 230 is magnetically connected to the fourth pole piece 222, and the N pole of the second permanent magnet 234b is the first pole piece 211 and Magnetically connected.

When the magnetic closed loop as shown in FIG. 3D is formed, the magnetism in a direction toward the first and second operation surfaces 211a and 212a, and the third and fourth operation surfaces 221a and 222a. No flow is formed, and the objects 1a and 1b cannot be held in the first pole piece assembly 210 and the second pole piece assembly 220.

As such, the magnetic force control device 300 according to another embodiment of the present invention includes a first pole piece assembly 210 and a second pole piece assembly 220 having the same structure, and the rotating magnet 230 rotates. The first pole piece assembly 210 and the second pole piece assembly 220 simultaneously hold the objects 1a and 1b, or the first pole piece assembly 210 and the second pole piece The assembly 220 is configured to simultaneously release the holding of the objects 1a and 1b.

4A to 4E are views showing modified embodiments of a rotating magnet.

The rotating magnet 1310 shown in FIG. 4A is provided in a cylindrical shape having a substantially circular cross section. The rotating magnet 1310 includes a rotating shaft 1312 disposed rotatably, a pair of permanent magnets 1314a, 1314b, magnetic materials 1315a, 1315b, 1315c, 1315d, and diamagnetic. It includes a sieve 1316.

The diamagnetic material 1316 is coupled to the rotation shaft 1312 and is disposed rotatably together with the rotation shaft 1312. The diamagnetic material 1316 has a repulsive force against the magnetic field formed outside, and thus the diamagnetic material 1316 does not form a magnetic flow or blocks magnetic flow.

The magnetic bodies 1315a, 1315b, 1315c, and 1315d are coupled to the diamagnetic material 1316 along the circumferential direction of the rotating magnet 1310 and disposed to be rotatable about the rotation shaft 1312. The magnetic bodies 1315a, 1315b, 1315c, and 1315d are provided in an arc shape forming an outer circumferential surface of the rotating magnet 1310 and are spaced apart from each other.

The first permanent magnet 1314a and the second permanent magnet 1314b are arranged in a structure in which opposite polarities face each other with the rotation shaft 1312 and the diamagnetic material 1316 interposed therebetween.

The first permanent magnet 1314a is disposed to contact adjacent magnetic bodies 1315a and 1315b, and both ends of the first permanent magnet 1314a are inserted and accommodated in adjacent magnetic bodies 1315a and 1315b, respectively.

The second permanent magnet 1314b is disposed so as to contact adjacent magnetic bodies 1315c and 1315d, and both ends of the second permanent magnet 1314b are accommodated in adjacent magnetic bodies 1315c and 1315d, respectively.

The first permanent magnet 1314a and the adjacent magnetic bodies 1315a and 1315b are magnetized to the polarity of the first permanent magnet 1314a, respectively, and the second permanent magnet 1314b and the adjacent magnetic bodies 1315c and 1315d are respectively 2 It is magnetized to the polarity of the permanent magnet 1314b.

Since a diamagnetic material 1316 is disposed between the first permanent magnet 1314a and the adjacent magnetic materials 1315a and 1315b and the second permanent magnet 1314b and the adjacent magnetic materials 1315c and 1315d, the first permanent magnet 1314a Magnetic flow is not formed between the magnetic bodies 1315a and 1315b adjacent to and between the second permanent magnet 1314b and the magnetic bodies 1315c and 1315d adjacent to each other.

In FIG. 4A, a structure in which the rotating magnet 1310 has a pair of permanent magnets 1314a and 1314b has been described, but the number of permanent magnets is not limited thereto. For example, the rotating magnet 1310 may have a structure including a plurality of permanent magnets spaced apart from each other in the direction of the rotating shaft 1312 of the rotating magnet 1310.

In addition, the first permanent magnet 1314a and the second permanent magnet 1314b may be disposed in a structure in which the same polarity faces each other with the rotation shaft 1312 and the diamagnetic material 1316 interposed therebetween.

The rotating magnet 1320 shown in FIG. 4B is provided in a cylindrical shape having an approximately circular cross section. The rotating magnet 1320 includes a rotating shaft 1322 disposed rotatably, a pair of permanent magnets 1324a and 1324b, and a diamagnetic body 1326.

The diamagnetic material 1326 is coupled to the rotation shaft 1322 and is disposed rotatably together with the rotation shaft 1322. The diamagnetic material 1326 has a repulsive force against the magnetic field formed outside, and thus the diamagnetic material 1326 does not form a magnetic flow or blocks magnetic flow.

The first permanent magnet 1324a and the second permanent magnet 1324b are disposed in a structure in which opposite polarities face each other with the rotation shaft 1322 and the diamagnetic material 1326 interposed therebetween. The first permanent magnet 1324a and the second permanent magnet 1324b are provided in a structure to be inserted into the diamagnetic material 1326, and the outer circumferential surfaces of the first permanent magnet 1324a and the second permanent magnet 1324b are diamagnetic materials ( 1326). Therefore, no magnetic flow is formed between the first permanent magnet 1324a and the second permanent magnet 1324b.

In FIG. 4B, a structure in which the rotating magnet 1320 has a pair of permanent magnets 1324a and 1324b has been described, but the number of permanent magnets is not limited thereto. For example, the rotating magnet 1320 may have a structure including a plurality of permanent magnets spaced apart from each other in the direction of the rotation axis 1322 of the rotating magnet 1320.

In addition, the first permanent magnet 1324a and the second permanent magnet 1324b may be disposed in a structure in which the same polarity faces each other with the rotation shaft 1322 and the diamagnetic material 1326 interposed therebetween.

The rotating magnet 1330 shown in FIG. 4C has substantially the same structure as the structure in which any one of the pair of permanent magnets 134a and 134b included in the rotating magnet 130 shown in FIGS. 1A to 1D has been removed. Have.

The rotating magnet 1330 includes a rotating shaft 1332 disposed rotatably, a permanent magnet 1334, and a diamagnetic body 1336.

The diamagnetic material 1336 is coupled to the rotation shaft 1332 and is disposed to be rotatable together with the rotation shaft 1332. The diamagnetic material 1336 has a repulsive force against a magnetic field formed outside, and thus the diamagnetic material 1336 does not form a magnetic flow or blocks magnetic flow.

The permanent magnet 1334 is coupled to one side of the diamagnetic material 1336 and is arranged to be rotatable about the rotation shaft 132. The permanent magnet 1334 has an arc shape forming an outer peripheral surface of the rotating magnet 1330.

The permanent magnet 1334 is spaced apart from the rotation shaft 1332 in the radial direction of the rotating magnet 1330, and the cross-sectional area of the permanent magnet 1334 may be provided less than 1/2 of the total cross-sectional area of the rotating magnet 1330.

In FIG. 4C, a structure in which the rotating magnet 1330 has one permanent magnet 1334 has been described, but the number of permanent magnets is not limited thereto. For example, the rotating magnet 1330 may have a structure including a plurality of permanent magnets spaced apart from each other in the direction of the rotating shaft 1332 of the rotating magnet 1330.

The rotating magnet 1340 shown in FIG. 4D has substantially the same structure as a structure in which any one of a pair of permanent magnets 1314a and 1314b included in the rotating magnet 1310 shown in FIG. 4A is removed.

The rotating magnet 1340 includes a rotating shaft 1342 disposed rotatably, a permanent magnet 1344, magnetic bodies 1345a and 1345b, and a diamagnetic body 1346.

The diamagnetic material 1346 is coupled to the rotation shaft 1342 and is disposed to be rotatable together with the rotation shaft 1342. The diamagnetic material 1346 has a repulsive force against the magnetic field formed outside, and thus the diamagnetic material 1346 does not form a magnetic flow or blocks magnetic flow.

The magnetic bodies 1345a and 1345b are coupled to the diamagnetic body 1346 along the circumferential direction of the rotating magnet 1340 and are arranged to be rotatable about the rotation shaft 1342. The magnetic bodies 1345a and 1345b are provided in an arc shape forming the outer circumferential surface of the rotating magnet 1340 and are spaced apart from each other. The magnetic bodies 1345a and 1345b are disposed on either side of the rotating magnet 1340 based on the straight line L1 passing through the rotating shaft 1342.

The permanent magnet 1344 is disposed to contact the magnetic bodies 1345a and 1345b, and both ends of the permanent magnet 1344 are inserted and accommodated in the magnetic bodies 1345a and 1345b, respectively.

The magnetic bodies 1345a and 1345b are respectively magnetized to the same polarity as that of the adjacent permanent magnet 1344.

In FIG. 4D, a structure in which the rotating magnet 1340 has one permanent magnet 1344 has been described, but the number of permanent magnets is not limited thereto. For example, the rotating magnet 1340 may have a structure including a plurality of permanent magnets spaced apart from each other in the direction of the rotating shaft 1342 of the rotating magnet 1340.

The rotating magnet 1350 shown in FIG. 4E has substantially the same structure as a structure in which any one of the pair of permanent magnets 1324a and 1324b included in the rotating magnet 1320 shown in FIG. 4B is removed.

The rotating magnet 1350 includes a rotating shaft 1352 disposed rotatably, a permanent magnet 1354, and a diamagnetic body 1356.

The diamagnetic material 1356 is coupled to the rotation shaft 1352 and is disposed rotatably together with the rotation shaft 1352. The diamagnetic material 1356 has a repulsive force against the magnetic field formed outside, and thus the diamagnetic material 1356 does not form magnetic flow or blocks magnetic flow.

The permanent magnet 1354 is disposed on either side of the rotating magnet 1350 based on a straight line L2 passing through the rotation axis 1352 of the diamagnetic body 1356.

The permanent magnet 1354 is provided in a structure that is inserted into the diamagnetic material 1356, and the outer peripheral surface of the permanent magnet 1354 is surrounded by a diamagnetic material 1326.

In FIG. 4E, a structure in which the rotating magnet 1350 has one permanent magnet 1354 has been described, but the number of permanent magnets is not limited thereto. For example, the rotating magnet 1350 may have a structure including a plurality of permanent magnets spaced apart from each other in the direction of the rotation axis 1352 of the rotating magnet 1350.

5A to 5C are views schematically showing a magnetic force control apparatus according to another embodiment of the present invention.

5A to 5C, the magnetic force control device 400 includes a first pole piece 410, a second pole piece 420, a rotating magnet 430, a coil 440, a fixed magnet 450 and a bridge. (bridge, 460).

The first pole piece 410 is made of a ferromagnetic material such as iron so as to form a magnetic flow, and includes a first action surface 412 and a first support surface 414.

The first working surface 412 is provided at an outer end of the first pole piece 410. When a magnetic flow is formed on the first working surface 412, an object having magnetism may be held on the first working surface 412.

The first support surface 414 is provided on the inner surface of the first pole piece 410. The first support surface 414 contacts one end of the fixed magnet 450 to support the fixed magnet 450. 5A to 5C illustrate a structure in which the first support surface 414 contacts the N pole of the fixed magnet 450, a structure in contact with the S pole of the fixed magnet 450 may also be applied.

The second pole piece 420 is disposed spaced apart from the first pole piece 410 with the fixed magnet 450 interposed therebetween.

The second pole piece 420 is made of a ferromagnetic material such as iron so as to form a magnetic flow, and includes a second action surface 422 and a second support surface 424.

The second working surface 422 is provided at an outer end of the second pole piece 420. When a magnetic flow is formed on the second working surface 422, an object having magnetism may be held on the second working surface 422. The second working surface 422 is disposed horizontally and parallel to the first working surface 412 so that it can stably contact the object.

When a magnetic flow is formed on the first and second action surfaces 412 and 422, the object may contact the first and second action surfaces 412 and 422, and the object is subjected to the first action. When the surface 412 and the second working surface 422 are in contact, a magnetic flow is formed with the first pole piece 410 and the second pole piece 420, and the magnetic force control device 400 is held therein.

The second support surface 424 is provided on the inner surface of the second pole piece 420. The second support surface 424 contacts the other end of the fixed magnet 450 to support the fixed magnet 450. 5A to 5C illustrate a structure in which the second support surface 424 contacts the S-pole of the fixed magnet 450, a structure in which the second support surface 424 contacts the N-pole of the fixed magnet 450 may also be applied.

The coil 440 may be wound around at least one of the first pole piece 410 and the second pole piece 420. 5A to 5C show a structure in which the coil 440 is wound around the second pole piece 420, but the structure in which the coil 440 is wound around the first pole piece 410 or the first pole piece 410 And a structure in which all of the second pole piece 420 is wound is applicable.

The coil 440 is disposed between the fixed magnet 450 and the rotating magnet 430.

When a current flows through the coil 440, magnetic flow is formed in a certain direction according to Ampere's right-handed screw rule, and the second pole piece 420 wound by the first coil 440 The N pole and S pole are formed according to the direction of magnetic flow. That is, a portion of the coil 440 and the second pole piece 420 wound around the coil 440 may be viewed as a configuration that serves as an electromagnet.

The fixed magnet 450 is provided as a permanent magnet, the N pole of the fixed magnet 450 is in contact with the first pole piece 410, and the S pole of the fixed magnet 450 is in contact with the second pole piece 420 It is arranged as much as possible. The fixed magnet 450 is disposed closer to the first working surface 412 and the second working surface 422 than the rotating magnet 430.

The rotating magnet 430 is provided in a cylindrical shape having an approximately circular cross section. The rotating magnet 430 includes a rotating shaft 432 disposed rotatably and a permanent magnet 434. The permanent magnet 434 is disposed to be rotatable about the rotation shaft 432.

The rotating magnet 430 has its S pole close to the first pole piece 410 and magnetically connected to the first pole piece 410, and its N pole close to the second pole piece 420 A first position magnetically connected to the pole piece 420 (see FIG. 5A), and its N pole is magnetically connected to the first pole piece 410 in proximity to the first pole piece 410, and The S pole is disposed so as to be rotatable between the second pole piece 420 and a second position magnetically connected to the second pole piece 420 (see FIG. 5C).

The bridge 460 is made of a ferromagnetic material such as iron, and is disposed around the first pole piece 410 and the second pole piece 420 to magnetically guide the rotation of the rotating magnet 430.

The bridge 460 forms a rotation path P3 of the rotating magnet 430 together with the first pole piece 410 and the second pole piece 420. When a voltage is applied to the coil 440 and current flows, the rotating magnet 430 rotates, and the bridge 460 is, in the process of rotating the rotating magnet 430 along the rotation path P3, the rotating magnet ( 430) is magnetically induced. Therefore, the rotating magnet 430 can be rotated with little power.

5A to 5C show a structure in which one bridge 460 is disposed between the first pole piece 410 and the second pole piece 420, but the number and placement of the bridges 460 are not limited thereto. Does not.

For example, the bridge 460 may be disposed between the rotating magnet 430 and the fixed magnet 450, and at least two or more may be spaced apart around the rotation path P3 of the rotating magnet 430.

Hereinafter, with reference to FIGS. 5A to 5C again, the principle of holding or releasing the object 1, which is a magnetic object, will be described.

First, referring to FIG. 5A, when power is not applied to the coil 440 and no current flows, the N pole of the fixed magnet 450 in the first pole piece 410 in contact with the N pole of the fixed magnet 450 A portion adjacent to and is magnetized to an S pole, and a portion relatively far from the N pole of the fixed magnet 450, that is, a portion adjacent to the rotating magnet 430 is magnetized to an N pole.

On the contrary, in the second pole piece 112 in contact with the S pole of the fixed magnet 450, the portion adjacent to the S pole of the fixed magnet 450 is magnetized to the N pole and is relatively far from the S pole of the fixed magnet 450. A portion, that is, a portion adjacent to the rotating magnet 430 is magnetized to the S pole.

The rotating magnet 430 has its S pole close to the first pole piece 410 and magnetically connected to the first pole piece 410, and its N pole close to the second pole piece 420 The pole piece 420 is disposed to rotate to a first position magnetically connected.

When the rotating magnet 430 is rotated and placed in the first position, as shown in the dotted line shown in FIG. 5A, the first pole piece 410, the rotating magnet 430, the second pole piece 420, and the fixed magnet 450 ), a magnetic closed loop is formed.

In a state in which the rotating magnet 430 is rotated and disposed in the first position, since magnetic flow is not formed in the direction toward the first and second operation surfaces 412 and 422, the object 1 is It cannot be held on the first working surface 412 and the second working surface 422.

When the coil 440 is controlled so that a current flows through the coil 440 as shown in FIG. 5B, an S pole is formed in a portion adjacent to the second action surface 422 of the second pole piece 420, An N pole is formed at a portion of the second pole piece 420 adjacent to the rotating magnet 430.

When a sufficient current flows through the coil 440, the rotating magnet 430 receives a repulsive force from the second pole piece 420, and the rotating magnet 430 rotates.

When the rotating magnet 430 is rotated 180 degrees from the first position and disposed in the second position as shown in FIG. 5C, the rotating magnet 530 is the first pole piece 410 with its N pole close to the first pole piece 410. The pole piece 410 is magnetically connected, and the S pole is magnetically connected to the second pole piece 420 in proximity to the second pole piece 420.

When the rotating magnet 430 is rotated and disposed in the second position, a magnetic flow is formed on the first and second operation surfaces 412 and 422, and the magnetic flow forms a magnetic closed loop together with other magnetic materials. Can be formed. That is, magnetic flow is diverged through the first working surface 412 or the second working surface 422. Herein, "the divergence of magnetic flow" means when magnetic flow is formed from the first working surface 412 or the second working surface 422 to the outside, and the first working surface 412 or the second working surface ( 422).

Therefore, when the magnetic object 1 is in contact with the first and second action surfaces 412 and 422, the object 1 is a rotating magnet 430, a first pole piece 410, and a second pole. As shown in FIG. 5C together with the piece 420, a magnetic closed loop is formed, and is held by the magnetic force control device 400 through the first and second action surfaces 412 and 422.

In addition, in a state in which the rotating magnet 430 is disposed in the second position, the fixed magnet 450 cannot form magnetic flow with the rotating magnet 430, thus forming another magnetic closed loop with the object 1 Is done.

When the magnetic closed loops as shown in FIG. 5C are formed, the magnetic closed loops are maintained even when the voltage applied to the coil 440 is removed, so that the holding of the object 1 is maintained.

In a state in which the rotating magnet 430 is disposed in the second position, when the coil 440 is controlled so that the current flows in the direction opposite to the direction of the current shown in FIG. 1B, the rotating magnet 430 is again in the first position. It is rotated to form a magnetic closed loop with the fixed magnet 450, and the object 1 may be separated from the magnetic force control device 400.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and is generally used in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Various modifications are possible by those skilled in the art of course, and these modifications should not be individually understood from the technical idea or perspective of the present invention.

100, 200, 300, 400. Magnetic force control device
110, 210. First pole piece assembly
120, 220. Second pole piece assembly
130, 230, 430. Rotating magnet

Claims (29)

A first pole piece assembly having at least one fixed magnet and at least one first coil;
A second pole piece assembly spaced apart from the first pole piece assembly and having at least one second coil; Wow,
Rotating by controlling current flowing through the first coil or the second coil to form at least one magnetic flow different from each of the first pole piece assembly and the second pole piece assembly, or the first pole piece assembly And a rotating magnet configured to form one magnetic closed loop together with the second pole piece assembly. of
Magnetic force control device comprising. The method of claim 1,
The rotating magnet is a magnetic force control device disposed between the first pole piece assembly and the second pole piece assembly. The method of claim 1,
The magnetic force control device wherein the first pole piece assembly and the second pole piece assembly are arranged to form a receiving portion accommodating the rotating magnet. The method of claim 1,
The rotating magnet is a magnetic force control device comprising a plurality of N poles and S poles alternately arranged in the circumferential direction. The method of claim 1,
The rotating magnet,
A plurality of permanent magnets,
Magnetic force control device comprising a diamagnetic body disposed between the plurality of permanent magnets. The method of claim 5,
A magnetic force control device in which the rotation center of the rotating magnet is disposed on the diamagnetic material. The method of claim 1,
The rotating magnet,
A plurality of permanent magnets,
Magnetic force control device comprising a diamagnetic material surrounding the plurality of permanent magnets. The method of claim 1,
The rotating magnet,
At least one permanent magnet,
At least one magnetic material disposed around the at least one permanent magnet,
Magnetic force control device comprising a diamagnetic material disposed around the at least one magnetic material. The method of claim 1,
The rotating magnet,
A first permanent magnet,
A second permanent magnet spaced apart from the first permanent magnet,
Magnetic force control device comprising a diamagnetic material disposed between the first permanent magnet and the second permanent magnet. The method of claim 1,
The rotating magnet,
A diamagnetic material disposed rotatably,
Magnetic force control device comprising at least one permanent magnet coupled to the diamagnetic material. The method of claim 10,
The rotating magnet,
Magnetic force control device further comprising at least one magnetic material coupled to the diamagnetic material and the at least one permanent magnet. The method of claim 1,
The first pole piece assembly includes at least one first working surface,
The second pole piece assembly includes at least one second working surface,
Magnetic force control device configured to form a magnetic flow in any one of the first working surface and the second working surface by the rotation of the rotating magnet. The method of claim 1,
The first pole piece assembly includes at least one first working surface,
The second pole piece assembly includes at least one second working surface,
Magnetic force control device configured to simultaneously form a magnetic flow on the first and second working surfaces by rotation of the rotating magnet. The method of claim 1,
A portion of the rotating magnet forms at least one magnetic closed loop together with any one of the first pole piece assembly and the second pole piece assembly,
The other portion of the rotating magnet is configured to form a magnetic flow diverging with the other one of the first pole piece assembly and the second pole piece assembly. The method of claim 1,
The rotating magnet is configured to form different magnetic flows diverging from the first pole piece assembly and the second pole piece assembly, respectively. Fixed magnet;
A first pole piece in contact with the N pole of the fixed magnet;
A second pole piece in contact with the S pole of the fixed magnet;
A third pole piece spaced apart from the first pole piece and the second pole piece;
A coil wound around at least one of the first pole piece and the second pole piece; and,
A rotating magnet rotatably disposed between a first position and a second position other than the first position by controlling the current flowing through the coil; Including,
In a state in which the rotating magnet is disposed in the first position, the fixed magnet, the rotating magnet, the first pole piece, the second pole piece, and the third pole piece form one magnetic flow,
When the rotating magnet is disposed in the second position, the fixed magnet, the rotating magnet, the first pole piece, the second pole piece, and the third pole piece form at least two or more different magnetic flows. Magnetic force control device configured to. The method of claim 16,
The rotating magnet,
A first permanent magnet,
A second permanent magnet spaced apart from the first permanent magnet,
Magnetic force control device comprising a diamagnetic material disposed between the first permanent magnet and the second permanent magnet. The method of claim 17,
In a state in which the rotating magnet is disposed in the first position, the first permanent magnet and the second permanent magnet form a first magnetic closed loop,
When the rotating magnet is disposed in the second position, the first permanent magnet forms a second magnetic closed loop different from the first magnetic closed loop together with the third pole piece, and the second permanent magnet is Magnetic force control device configured to form a first magnetic flow with the first pole piece and the second pole piece. The method of claim 18,
Magnetic force control device configured to form a second magnetic flow different from the first magnetic flow together with the first pole piece and the second pole piece while the rotating magnet is disposed in the second position . The method of claim 19,
The first pole piece includes a first working surface provided at one end thereof, and the first working surface includes the first magnetic flow and the second magnetic flow when the rotating magnet is disposed in the second position. Is configured to form a flow,
The second pole piece includes a second working surface provided at one end thereof, and the second working surface includes the first magnetic flow and the second magnetic flow when the rotating magnet is disposed in the second position. Magnetic force control device configured to form a flow. The method of claim 20,
The magnetic force control device wherein the first working surface and the second working surface are arranged parallel to each other. The method of claim 16,
The third pole piece,
A first sub-pole piece and a second sub-pole piece disposed spaced apart from each other,
Magnetic force control device comprising a connection pole piece connected to the first sub-pole piece and the second sub-pole piece. A plurality of pole piece assemblies;
A coil wound around at least one of the plurality of pole piece assemblies;
A rotating magnet disposed between the plurality of pole piece assemblies and rotatable by controlling current flowing through the coil; Including,
By the rotation of the rotating magnet, one of the plurality of pole piece assemblies forms a magnetic closed loop, and the other is configured to form a magnetic flow radiating outward. The method of claim 23,
The rotating magnet is rotatable around a rotating shaft,
The rotating magnet includes a diamagnetic material disposed on one side of the center line and a permanent magnet disposed on the other side of the center line based on a center line passing through the rotation axis. A first permanent magnet;
A first pole piece in contact with the N pole of the first permanent magnet;
A second pole piece in contact with the S pole of the first permanent magnet;
A second permanent magnet rotatably disposed on a rotation path formed by the first pole piece and the second pole piece; and
A coil wound around at least one of the first pole piece and the second pole piece; Including,
At least one bridge disposed around the first pole piece and the second pole piece and configured to magnetically guide the rotation of the second permanent magnet; Magnetic force control device comprising a. The method of claim 25,
The magnetic force control device, wherein the at least one bridge is configured to form at least a portion of the rotation path. The method of claim 25,
The magnetic force control device including two or more bridges disposed opposite to each other with the second permanent magnet interposed between the at least one bridge. The method of claim 25,
The magnetic force control device wherein the at least one bridge is disposed between the first permanent magnet and the second permanent magnet. A magnetic material holding device comprising the configuration of the magnetic force control device of claim 1 or 28.

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