Switchgear Operating Mechanism

Abstract

The present invention relates to a driving device for opening and closing a switchgear. A drive device for opening and closing a switchgear according to an embodiment of the present invention comprises: a rotating shaft member; a first magnet; a second magnet; and a coil member that moves on one surface of the first magnet and one surface of the second magnet while rotating around the rotating shaft member.

Description

Technology Field

[0001] The present invention relates to a driving device for opening and closing a switchgear. The present invention can be used for opening and closing switchgear in various fields, and in particular, can be applied to a driving device for operating a circuit breaker or disconnect switch of a high-voltage and low-voltage switchgear.

[0002] This patent is the result of research conducted with the support of the Regional Demand-Tailored Research and Development Project of Jeollanam-do and Jeonnam Technopark in 2023. Background Technology

[0003] A switchgear (Ring Main Unit) is a device that controls and protects the flow of power in a power system, and plays a role in protecting the power system by interrupting the circuit in the event of abnormal situations such as overload or short circuit. The driving devices that perform the opening and closing operations of such switchgear have generally used solenoid, spring, and electric motor types.

[0004] Solenoid-type actuators offer the advantage of fast opening and closing speeds, but their insufficient holding force makes them highly susceptible to malfunctions caused by external shocks or vibrations. Spring-type actuators, which store and release energy, offer high reliability; however, repetitive opening and closing movements lead to component wear and require periodic maintenance. Electric motor-type actuators provide high holding force but suffer from the disadvantages of slow overall operating times and high power consumption.

[0005] Among the prior art documents, Korean Registered Patent Publication No. 10-1699364 relates to a switchgear (Ring Main Unit). Prior art literature

[0006] Korean Registered Patent Publication No. 10-2387712 Korean Registered Patent Publication No. 10-2328475 Korean Published Patent Publication No. 10-2021-0095091 Korean Registered Patent Publication No. 10-1699364 The problem to be solved

[0007] The present invention aims to provide a drive device for opening and closing a switchgear capable of fast and stable opening and closing operation.

[0008] In addition, the present invention enables securing retention force without a separate mechanical locking structure.

[0009] In addition, the present invention has a simple structure while increasing durability. means of solving the problem

[0010] A drive device for opening and closing a switchgear according to an embodiment of the present invention comprises: a rotating shaft member; a first magnet; a second magnet; and a coil member that moves on one surface of the first magnet and one surface of the second magnet while rotating around the rotating shaft member.

[0011] One embodiment may further include a first limiting member that limits the rotation of the coil member when the coil member rotates in a first direction to become closed; a second limiting member that limits the rotation of the coil member when the coil member rotates in a second direction to become open; a first holding force generating member disposed on one side of the coil member and contacting the first limiting member in a closed state; and a second holding force generating member disposed on the other side of the coil member and contacting the second limiting member in an open state.

[0012] One side of the first magnet and one side of the second magnet are arranged to have different polarities.

[0013] The above coil member includes a bobbin and a coil portion for winding the bobbin.

[0014] Depending on the direction of the current applied to the coil member, the coil member becomes closed when rotated in a first direction and becomes open when rotated in a second direction.

[0015] When in a closed state, the first holding force generating member is magnetized by the magnetic field of the first magnet, and the first limiting member is magnetized by magnetic induction by the magnetization of the first holding force generating member, thereby forming a holding force that limits the coil member from moving in a second direction.

[0016] When in an open state, the second holding force generating member is magnetized by the magnetic field of the second magnet, and the second limiting member is magnetized by magnetic induction due to the magnetization of the second holding force generating member, thereby forming a holding force that limits the coil member from moving in a first direction.

[0017] When the direction of the current applied to the coil member is the first direction, a Lorentz force directed toward the first magnet is generated in the coil member by the second magnet, causing the coil member to rotate and move toward the first magnet so that it becomes closed.

[0018] When the direction of the current applied to the coil member is the second direction, a Lorentz force directed toward the second magnet is generated in the coil member by the first magnet, causing the coil member to rotate and move toward the second magnet so that it can become open.

[0019] The above coil portion may include a first winding portion located on one side of the first magnet in a closed state and a second winding portion located on one side of the second magnet in an open state.

[0020] When the direction of the current applied to the coil member in the open state is the first direction, the coil member rotates in the first direction by the current moving along the second winding section and the magnetic force of the second magnet to become closed, and the coil member can be continuously maintained in the closed state by the current moving along the first winding section and the magnetic force of the first magnet.

[0021] When the direction of the current applied to the coil member in the closed state is the second direction, the coil member rotates in the second direction by the current moving along the first winding section and the magnetic force of the first magnet to open, and the coil member can be continuously maintained in the open state by the current moving along the second winding section and the magnetic force of the second magnet.

[0022] The above coil portion may include a first winding portion located on one side of the first magnet in a closed state and a second winding portion located on one side of the second magnet in an open state.

[0023] In the closed state, the first winding part may be located on one side of the first magnet and the second winding part may be located on one side of the second magnet.

[0024] In the open state, the first winding part may be located on one side of the second magnet, and the second winding part may be located on one side of the first magnet.

[0025] The above coil portion may include a first winding portion located on one side of the first magnet in a closed state, a second winding portion located on one side of the second magnet in an open state, and a third winding portion wound to connect the first winding portion and the second winding portion and to surround the rotating shaft member.

[0026] The distance between the first winding section and the second winding section increases as it moves further away from the third winding section, the first magnet is positioned on one side of the rotating shaft member, the distance between the surface facing the first direction and the surface facing the second direction increases as it moves further away from the rotating shaft member, the second magnet is positioned on the other side of the rotating shaft member, and the distance between the surface facing the first direction and the surface facing the second direction can increase as it moves further away from the rotating shaft member.

[0027] In one embodiment, a driving module comprising a rotating shaft member, a first magnet, a second magnet, a coil member, and a plate as a set may be arranged in multiple layers. Effects of the invention

[0028] A drive device for opening and closing a switchgear according to an embodiment of the present invention enables fast and stable opening and closing operations.

[0029] In addition, the present invention enables securing retention force without a separate mechanical locking structure.

[0030] In addition, the present invention has a simple structure while increasing durability. Brief explanation of the drawing

[0031] FIG. 1 illustrates a driving device for opening and closing a switchgear according to an embodiment of the present invention. Figure 2 is an exploded perspective view of Figure 1. Figures 3 and 4 show the closed and open states, respectively, viewed from above, with the top plate and magnet removed. Figures 5 and 6 show the closed and open states, respectively, as viewed from the front. FIGS. 7 and FIGS. 8 illustrate a coil member and a retaining force generating member. FIG. 9 illustrates the holding force of the holding force generating member and the limiting member. Specific details for implementing the invention

[0032] Preferred embodiments of the present invention are described below with reference to the attached drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. Accordingly, the shapes and sizes of elements in the drawings may be exaggerated for clearer explanation, and elements indicated by the same reference numerals in the drawings are the same elements. Additionally, the same reference numerals are used throughout the drawings for parts having similar functions and operations. Furthermore, throughout the specification, the term "comprising" a component means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0034] FIGS. 1 to 6 illustrate a drive device (100) for opening and closing a switchgear according to an embodiment of the present invention. Referring to FIGS. 1 to 6, the drive device (100) for opening and closing a switchgear according to an embodiment of the present invention comprises a rotating shaft member (150); a first magnet (111); a second magnet (112); and a coil member (120) that moves on one surface of the first magnet (111) and one surface of the second magnet (112) while rotating around the rotating shaft member (150).

[0035] One embodiment may further include a first limiting member (131) that limits the rotation of the coil member (120) when the coil member (120) rotates in a first direction to become closed; a second limiting member (132) that limits the rotation of the coil member (120) when the coil member (120) rotates in a second direction to become open; a first holding force generating member (141) disposed on one side of the coil member (120) and contacting the first limiting member (131) in a closed state, and a second holding force generating member (142) disposed on the other side of the coil member (120) and contacting the second limiting member (132) in an open state.

[0036] Additionally, one embodiment may further include a power supply member that applies current to the coil member (120) and a control unit that controls the operation of the power supply member.

[0038] In the present invention, depending on the direction of the current applied to the coil member (120), the coil member (120) becomes closed when rotated in a first direction and becomes open when rotated in a second direction. The closed state and the open state are distinguished according to the position where the rotating shaft member (150) is rotated and maintained, and may refer to the current cutoff state of a device (such as a circuit breaker) on which the switchgear opening / closing driving device (100) is mounted. The present invention can control the opening / closing state using Lorentz force and magnetic induction.

[0040] The above-mentioned rotating shaft member (150) rotates together with the above-mentioned coil member (120) and transmits the Lorentz force generated from the above-mentioned coil member (120) to perform opening and closing operations. In one embodiment, one end of the above-mentioned rotating shaft member (150) may be fixed and positioned on the above-mentioned bobbin (121), and the other end may be connected to an external structure. The above-mentioned rotating shaft member (150) may be cylindrical or columnar in shape and may be made of metal, alloy, etc.

[0042] The first magnet (111) and the second magnet (112) form a magnetic field to induce rotation of the coil member (120) and provide a holding force. The first magnet (111) and the second magnet (112) are positioned on both sides of the rotation axis member (150) and are arranged to have different polarities. The first magnet (111) and the second magnet (112) each form a magnetic field at their respective positions to apply a force that causes the coil member (120) to rotate in a specific direction.

[0043] The first magnet (111) and the second magnet (112) are positioned below and / or above the coil member (120), and are arranged so that the surfaces facing the coil member (120) have different poles. The first magnet (111) and the second magnet (112) may be fan-shaped plates having an arc along the rotational direction of the rotation axis member (150).

[0045] The above coil member (120) includes a bobbin (121) and a coil portion (122) surrounding the bobbin (121), and forms a magnetic field by the current flowing through the coil portion (122) and generates a Lorentz force by the interaction with the first magnet (111) and the second magnet (112). This Lorentz force generates rotational force, thereby enabling the operation of the rotational shaft member (150).

[0046] The bobbin (121) may be in the shape of a triangular plate with rounded corners, and these corners may be defined as the first to third corners, respectively. In this case, the rotational shaft member (150) may be fixedly positioned on the first corner side (see FIG. 3 and FIG. 4). The coil portion (122) is wound along the edge of the bobbin (121), and the portion positioned on the surface connecting the first corner to the second corner may be referred to as the first winding portion (122a), and the portion positioned on the surface connecting the first corner to the third corner may be referred to as the second winding portion (122b). Additionally, the portion wound to connect one end of the first winding portion (122a) and one end of the second winding portion (122b) and to surround the rotating shaft member (150) may be referred to as the third winding portion (122c), and the portion connecting the other end of the first winding portion (122a) and the other end of the second winding portion (122b) may be referred to as the fourth winding portion (122d). In this case, the coils are wound in the order of the first winding portion (122a), the third winding portion (122c), the second winding portion (122b), and the fourth winding portion (122d).

[0047] In such a structure, the distance between the first winding section (122a) and the second winding section (122b) increases as it moves further away from the third winding section (122c), the first magnet (111) is positioned on one side of the rotating shaft member (150), the distance between the surface facing the first direction and the surface facing the second direction increases as it moves further away from the rotating shaft member (150), and the second magnet (112) is positioned on the other side of the rotating shaft member (150), the distance between the surface facing the first direction and the surface facing the second direction can increase as it moves further away from the rotating shaft member (150). Additionally, the current flowing through the coil section (122) may have the opposite direction in the first winding section (122a) and the second winding section (122b).

[0049] In one embodiment, the first magnet (111) and the second magnet (112) may be placed above or below the coil member (120). Referring to FIGS. 1 and 2, the first magnet (111) and the second magnet (112) may be placed above and below the coil member (120), respectively. The coil member (120) is placed and moves at a constant distance from one or the other side of the first magnet (111) and the second magnet (112) placed above and / or below, and from one or the other side of the first magnet (111) and the second magnet (112) placed above and below.

[0050] In this case, the pole positions of the first magnet (111) and the second magnet (112) are the same, so the poles facing the upper and lower surfaces of the coil member (120) are different. In one embodiment, the first magnet (111), the second magnet (112), and the coil member (120) may be stacked in multiple layers and may further include a plate (160) that separates each layer. The plate (160) may be made of an insulating material such as a polymer resin and fixes components such as the first magnet (111) and the second magnet (112) and separates them from each other.

[0052] FIGS. 3 and 5 illustrate the closed state, and FIGS. 4 and 6 illustrate the open state. When the direction of the current applied to the coil member (120) is the first direction, a Lorentz force directed toward the first magnet (111) is generated in the coil member (120) by the second magnet (112), causing the coil member (120) to rotate and move toward the first magnet (111) to become closed (the coil member (120) rotates in the direction of the arrow in FIG. 3). That is, a Lorentz force directed toward the first direction is generated. Conversely, when the direction of the current applied to the coil member (120) is the second direction, a Lorentz force directed toward the second magnet (112) is generated in the coil member (120) by the first magnet (111), causing the coil member (120) to rotate and move toward the second magnet (112) and become open (the coil member (120) rotates in the direction of the arrow in Fig. 4). That is, a Lorentz force directed toward the second direction is generated. This is because the direction of the current flowing through the coil portion (122) wound along the bobbin (121) of the coil member (120) is opposite to each other on one side and the other side of the bobbin (121), and the one side and the other side of the bobbin (121) are each located on different magnets.

[0054] As previously explained, the coil portion (122) includes a first winding portion (122a) located on one side of the first magnet (111) in a closed state and a second winding portion (122b) located on one side of the second magnet (112) in an open state. In this case, in a closed state, the first winding portion (122a) is located on one side of the first magnet (111) and the second winding portion (122b) is located on one side of the second magnet (112), and in an open state, the first winding portion (122a) is located on one side of the second magnet (112) and the second winding portion (122b) is located on one side of the first magnet (111) (see FIG. 8).

[0055] When the direction of the current applied to the coil member (120) in the open state (Fig. 4) is the first direction, the coil member (120) rotates in the first direction by the current moving along the second winding section (122b) and the magnetic force of the second magnet (112) to become closed (Fig. 3). Additionally, a force is generated by the current moving along the first winding section (122a) and the magnetic force of the first magnet (111) to continuously maintain the coil member (120) in the closed state. Conversely, when the direction of the current applied to the coil member (120) in the closed state (Fig. 3) is the second direction, the coil member (120) rotates in the second direction by the current moving along the first winding section (122a) and the magnetic force of the first magnet (111) to become open (Fig. 4), and a force is generated to continuously maintain the open state of the coil member (120) by the current moving along the second winding section (122b) and the magnetic force of the second magnet (112).

[0056] This is because, although the direction of the current flowing through the first winding section (122a) and the second winding section (122b) is opposite, the direction of the magnetic field of the first magnet (111) and the second magnet (112) is also opposite, so the direction of the Lorentz force generated in the coil member (120) is also opposite.

[0058] The first limiting member (131) and the second limiting member (132) block additional rotation of the coil member (120) to prevent the coil member (120) from moving out of a predetermined position. In addition, together with the first holding force generating member (141) and the second holding force generating member (142) described later, they generate a holding force that causes the switchgear opening / closing driving device (100) to maintain a closed or open state.

[0059] The first limiting member (131) and the second limiting member (132) may be made of a magnetic material, and a magnetic induction effect may be generated by the magnetic field of the first magnet (111) and the second magnet (112) and the magnetic field of the first holding force generating member (141) and the second holding force generating member (142). The magnetic material may be aluminum, platinum, titanium, chromium, iron, etc.

[0060] The first limiting member (131) and the second limiting member (132) may each be positioned on one side of the first magnet (111) and the second magnet (112). Additionally, the first limiting member (131) and the second limiting member (132) may be positioned to protrude above or below the first magnet (111) and the second magnet (112) from the plate (160), so that when the coil member (120) rotates and moves, they may come into contact with the side of the coil member (120) or the side of the first holding force generating member (141) and the second holding force generating member (142). The first limiting member (131) and the second limiting member (132) may be fixed on the plate (160). In this case, the coil member (120) can rotate back and forth between the first limiting member (131) and the second limiting member (132), and in the closed state, the side of the coil member (120) or the side of the first holding force generating member (141) can be positioned in contact with the first limiting member (131), and in the open state, the side of the coil member (120) or the side of the second holding force generating member (142) can be positioned in contact with the second limiting member (132).

[0062] The first holding force generating member (141) and the second holding force generating member (142) provide a holding force to prevent the coil member (120) from moving unintentionally after the opening and closing operation is completed. The first holding force generating member (141) provides a holding force by contacting the first limiting member (131) in the closed state, and the second holding force generating member (142) provides a holding force by contacting the second limiting member (132) in the open state.

[0063] The first holding force generating member (141) and the second holding force generating member (142) may be made of a magnetic material and may be disposed on each side of the coil member (120). Referring to FIG. 5, the first holding force generating member (141) and the second holding force generating member (142) are long rod-shaped and are disposed on the first winding section (122a) and the second winding section (122b) of the coil member (120), respectively. The magnetic material may be aluminum, platinum, titanium, chrome, iron, etc.

[0064] The first holding force generating member (141) and the second holding force generating member (142) can continuously maintain an open / closed state by utilizing magnetic induction caused by the magnetic field generated from the coil member (120). When the coil member (120) moves to a closed state, the first holding force generating member (141) becomes magnetized, and as the first holding force generating member (141) comes into contact with the first limiting member (131), the first limiting member (131) also becomes magnetized, causing the first holding force generating member (141) and the first limiting member (131) to attract each other, thereby generating a strong holding force. FIG. 9 illustrates the results of a magnetic field analysis simulation between the holding force generating member and the limiting member (the coil member is omitted). It can be seen that the magnetic field is concentrated in the area where the holding force generating member and the limiting member come into contact.

[0066] The power supply member supplies current to the coil member (120) to generate a magnetic field. The power supply member can change the direction of the current supplied to the coil member (120), thereby determining the direction of rotation of the coil member (120). The power supply member may be a general type used in the field for supplying power to a coil and is not particularly limited.

[0068] The control unit performs the function of controlling and monitoring the operation of each component. The control unit may include a processor that stores and executes software commanding each component to operate, a memory that stores various information, and a display unit that displays information to a user. More specifically, the control unit may be a computer, and the control unit may implement the operation of each component by executing a software module or a computer program executed by hardware. The software module may reside in RAM (Random Access Memory), ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), Flash Memory, a hard disk, a removable disk, a CD-ROM, or any form of computer-readable recording medium well known in the art to which the present invention belongs.

[0069] In the present invention, the control unit can control the operation of the power supply member so that the switchgear opening / closing driving device (100) becomes closed or open.

[0071] The present invention may be configured such that a driving module comprising a first magnet (111), a second magnet (112), a coil member (120), and a plate (160) is stacked in multiple layers. In this case, the present invention comprises a driving module including a plate (160), a first magnet (111) disposed on the plate (160), a second magnet (112) disposed on the plate (160), and a coil member (120) disposed on the plate (160); and a rotational shaft member (150); wherein the coil member (120) moves on one surface of the first magnet (111) and one surface of the second magnet (112) while rotating around the rotational shaft member (150), and the driving module is composed of multiple layers. FIG. 1 discloses a structure arranged in multiple layers in this manner.

[0072] In one embodiment, a plurality of plates (160) are arranged vertically at regular intervals, and the first magnet (111), the second magnet (112), and the coil member (120) may be arranged in the space between the plates (160). In this case, the limiting member (131, 132) and the holding force generating member (141, 142) may also be arranged. The rotational shaft member (150) may be arranged to penetrate the plurality of the coil members (120) vertically. Referring to FIG. 1, a first magnet (111) and a second magnet (112) are disposed on the upper surface of a lower plate (160) and fixedly disposed on the lower surface of an upper plate (160), and the coil member (120) can be disposed in the space between the lower first magnet (111) and the second magnet (112) and the upper first magnet (111) and the second magnet (112).

[0073] In one embodiment, the driving force of the rotating shaft member (150) can be increased by configuring it in a stacked shape of multiple layers as described above. In this case, the driving force of the rotating shaft member (150) can be increased even if the thickness of the first magnet (111) and the second magnet (112) and / or the thickness of the plate is reduced. In one example, compared to the driving force generated by one driving module using a first magnet and a second magnet and a plate with a thickness of 10 mm, the driving force generated by a structure in which two driving modules using a first magnet and a second magnet and a plate with a thickness of 5 mm are stacked is doubled. Therefore, the driving force can be significantly increased while reducing the thickness of the magnets.

[0075] The present invention is not limited by the embodiments described above and the attached drawings, but is intended to be limited by the appended claims. Accordingly, various substitutions, modifications, and changes may be made by those skilled in the art within the scope of the technical concept of the present invention as described in the claims, without departing from the technical spirit of the invention, and such are also to be considered to fall within the scope of the present invention. Explanation of the symbols

[0076] 100: Driving device for opening and closing a switchgear, 111: First magnet, 112: Second magnet, 120: Coil member, 121: Bobbin, 122: Coil section, 122a: First winding section, 122b: Second winding section, 122c: Third winding section, 122d: Fourth winding section, 131: First limiting member, 132: Second limiting member, 141: First holding force generating member, 142: Second holding force generating member, 150: Rotating shaft member, 160: Plate

Claims

Claim 1 A drive device for opening and closing a switch gear, comprising: a rotating shaft member; a first magnet; a second magnet; and a coil member that moves on one surface of the first magnet and one surface of the second magnet while rotating around the rotating shaft member, wherein the one surface of the first magnet and one surface of the second magnet are arranged to have different polarities, and the coil member comprises a bobbin and a coil portion for winding the bobbin, wherein the coil member becomes closed when rotated in a first direction and becomes open when rotated in a second direction according to the direction of the current applied to the coil member. Claim 2 A drive device for opening and closing a switch gear according to claim 1, further comprising: a first limiting member that limits the rotation of the coil member when the coil member rotates in a first direction to become closed; a second limiting member that limits the rotation of the coil member when the coil member rotates in a second direction to become open; a first holding force generating member disposed on one side of the coil member and contacting the first limiting member in a closed state; and a second holding force generating member disposed on the other side of the coil member and contacting the second limiting member in an open state. Claim 3 A drive device for opening and closing a switchgear according to claim 2, wherein, in the closed state, the first holding force generating member is magnetized by the magnetic field of the first magnet, and the first limiting member is magnetized by magnetic induction by the magnetization of the first holding force generating member to form a holding force that limits the coil member from moving in a second direction, and in the open state, the second holding force generating member is magnetized by the magnetic field of the second magnet, and the second limiting member is magnetized by magnetic induction by the magnetization of the second holding force generating member to form a holding force that limits the coil member from moving in a first direction. Claim 4 A drive device for opening and closing a switchgear according to claim 1, wherein when the direction of the current applied to the coil member is a first direction, a Lorentz force directed toward the first magnet is generated in the coil member by the second magnet so that the coil member rotates and moves toward the first magnet to become closed, and when the direction of the current applied to the coil member is a second direction, a Lorentz force directed toward the second magnet is generated in the coil member by the first magnet so that the coil member rotates and moves toward the second magnet to become open. Claim 5 A drive device for opening and closing a switch gear, comprising: a plate, a first magnet disposed on the plate, a second magnet disposed on the plate, and a coil member disposed on the plate; a drive module including a plate, a first magnet disposed on the plate, and a coil member disposed on the plate; and a rotating shaft member; wherein the coil member moves on one surface of the first magnet and one surface of the second magnet while rotating around the rotating shaft member, the drive module is composed of a plurality of layers, and the one surface of the first magnet and one surface of the second magnet are arranged to have different polarities, and the coil member includes a bobbin and a coil portion for winding the bobbin, and wherein the coil member becomes closed when rotated in a first direction and becomes open when rotated in a second direction according to the direction of the current applied to the coil member.

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