artificial zero-crossing switch

Abstract

The application relates to an artificial zero-crossing switch in the field of switches, which comprises an opening and closing part K1 installed in a main passage and an opening and closing part K2 installed in an artificial zero-crossing branch. A structure part is arranged between the moving contact of the opening and closing part K1 and the moving contact of the opening and closing part K2 to make the opening and closing part K2 perform a closing action process along with the opening and closing part K1 during an opening action process of the opening and closing part K1. Thus, only the closing and opening action of any opening and closing part in the switch needs to be controlled, and the other opening and closing part in the switch can synchronously perform the opposite closing and opening action without additional control. In addition, compared with the high cost of a discharge gap, thyristor or IGBT, the artificial zero-crossing switch is more suitable for being applied to a high-voltage grade line.

Description

Technical Field

[0001] This invention relates to switches, and more particularly to manual zero-crossing switches. Background Technology

[0002] The switch trips at the moment the current crosses zero, resulting in a small breaking arc and enabling rapid interruption. This is particularly beneficial in scenarios involving the disconnection of faulty lines, as rapid switching helps reduce the severity and scope of the fault. Therefore, employing artificial zero-crossing technology to allow the switch to cross zero earlier for rapid interruption has become a key technological focus in the switchgear field. The most basic principle is: an artificial zero-crossing branch is connected in parallel with the main circuit switch. This branch includes a capacitor providing reverse current to the main circuit switch and a branch switch controlling the on / off state of this branch.

[0003] For example, in Chinese patents, CN219760623U discloses an artificial zero-crossing discharge circuit that uses a fast circuit breaker to achieve artificial zero crossing, and CN214479584U discloses an artificial zero-crossing driving switch and device. Both disclose using a fast switch or discharge gap as an artificial zero-crossing branch switch to control the branch to release reverse current into the main path, so that the main path crosses zero in advance.

[0004] For example, a thyristor or IGBT can be used as an artificial zero-crossing branch switch to control the artificial zero-crossing branch to release reverse current into the main path, so that the main path crosses zero earlier.

[0005] However, in the above-mentioned manual zero-crossing methods, different choices of manual zero-crossing branch switches lead to different situations:

[0006] 1. When using a fast switch as a manual zero-crossing branch switch, the cost is high because the branch switch and the main circuit switch are driven by their respective power supply systems for closing and opening. In addition, since the two sets of switches are independent of each other, the accuracy of their closing and opening coordination is limited to a certain extent.

[0007] Second, when using discharge gaps, thyristors, or IGBTs as artificial zero-crossing branch switches, the higher the main circuit voltage, the more materials are required for the discharge gaps, thyristors, or IGBTs, the larger their size, and the higher their cost, which affects their widespread use in high-voltage lines. Summary of the Invention

[0008] To address the issues raised in the background art regarding the independent influence of the main circuit switch and the manual zero-crossing branch switch on their closing and opening accuracy, and the high cost of using fast switches, discharge gaps, thyristors, or IGBTs in the manual zero-crossing branch switch, this invention provides the following technical solution:

[0009] An artificial zero-crossing switch includes an opening / closing part K1 installed in the main circuit and an opening / closing part K2 installed in the artificial zero-crossing branch circuit, each comprising a stationary contact and a moving contact. The main circuit is connected to the stationary contact of the opening / closing part K1 and exits through the moving contact of the opening / closing part K1, controlling the on / off state of the main circuit via the opening / closing part K1. A line connects the stationary contact of the opening / closing part K1 to the stationary contact of the opening / closing part K2, and a line connects the moving contact of the opening / closing part K1 to the moving contact of the opening / closing part K2. These two lines, together with the opening / closing part K2, constitute the artificial zero-crossing branch circuit and are connected in parallel to the opening / closing part K1. A capacitor C is connected in series in the artificial zero-crossing branch circuit to provide reverse current to the opening / closing part K1. A structural component is provided between the moving contacts of the opening / closing parts K1 and K2 to enable their linkage, so that during the opening operation of the opening / closing part K1, the opening / closing part K2 simultaneously performs a closing operation.

[0010] Furthermore, the manual zero-crossing switch also includes a repulsion disk and an eddy current disk. The structural component is a pull rod, with the moving contacts of the opening / closing portion K1 and K2 respectively located at both ends of the same pull rod. The repulsion disk is fixedly mounted on the pull rod, and the eddy current disk is fixedly suspended at either surface of the repulsion disk, without being in fixed contact with the pull rod.

[0011] Furthermore, the manual zero-crossing switch also includes a repulsion disk and an eddy current disk. The structural component is a pull rod, and each of the moving contacts of the opening / closing part K1 and the opening / closing part K2 is equipped with a pull rod. Each pull rod has a set of repulsion disks fixedly mounted on its shaft, and each set of repulsion disks is equipped with a set of eddy current disks. The eddy current disks are fixedly suspended at any point on the surface of the corresponding repulsion disk, and the eddy current disks are not in fixed contact with the pull rods.

[0012] Furthermore, the eddy current disks are connected in series or in parallel, and are all connected to the same power source that can supply power to each group of eddy current disks.

[0013] Furthermore, the manual zero-crossing switch also includes a repulsion disk and an eddy current disk. The structural components are a pull rod and a connecting rod. Each of the moving contacts of the opening / closing part K1 and the opening / closing part K2 is equipped with a pull rod. The two ends of the connecting rod are hinged to the bodies of the two pull rods, and the connecting rod has a rotation fulcrum. The repulsion disk is fixedly installed on the body of one of the pull rods, and the eddy current disk is fixedly suspended in either direction of the repulsion disk, without being in fixed contact with the pull rod.

[0014] Furthermore, the artificial zero-crossing switching capacitor is externally connected to a power source for pre-charging the capacitor; both the repulsion disk and the eddy current disk are coil disks, and the eddy current disk is externally connected to a power source for supplying power to the eddy current disk.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] I. In this invention, the manual zero-crossing switch can be connected to both the main path and the manual zero-crossing branch simultaneously, and the on / off state of the main path and the manual zero-crossing branch can be switched using only this manual zero-crossing switch. This eliminates the need for at least two independent switches for the original main path and the manual zero-crossing branch, thus reducing the overall cost of the switch.

[0017] Second, the manual zero-crossing switch in this invention includes two opening and closing parts, which are respectively connected to the main circuit and the manual zero-crossing branch. Only the closing and opening action of any one of the opening and closing parts of the switch needs to be controlled to make the other opening and closing part of the switch perform the opposite closing and opening action synchronously. No additional control is required for the other opening and closing part. This eliminates the need for the original main circuit switch and the manual zero-crossing branch switch to be used in coordination with each other, thereby ensuring the accuracy of the closing and opening coordination between opening and closing parts K1 and K2.

[0018] Third, the opening and closing part of the manual zero-crossing switch in this invention adopts a mechanical structure with moving and stationary contact. Compared with the high cost of discharge gaps, thyristors or IGBTs, the manual zero-crossing switch of this invention is more suitable for use on high voltage lines.

[0019] Fourth, the closing and opening control of the manual zero-crossing switch in this invention only requires controlling whether the eddy current plate is energized. That is, by controlling whether the power supply connected to the eddy current plate supplies power to the eddy current plate, the closing and opening control of the manual zero-crossing switch is completed, without the need for additional control operations. Attached Figure Description

[0020] Figure 1 This is a wiring diagram of a manual zero-crossing switch in the existing technology;

[0021] Figure 2 This is a schematic diagram of the wiring for the artificial zero-crossing switch in this invention;

[0022] Figure 3 This is a circuit topology diagram before the manual zero-crossing switch is disconnected according to Embodiment 1 of the present invention;

[0023] Figure 4 This is a circuit topology diagram for the manual zero-crossing switch interruption in Embodiment 1 of the present invention;

[0024] Figure 5 This is a circuit topology diagram after the manual zero-crossing switch is turned off according to Embodiment 1 of the present invention;

[0025] Figure 6 This is the circuit topology diagram before the manual zero-crossing switch is disconnected according to Embodiment 2 of the present invention;

[0026] Figure 7 This is the circuit topology diagram before the manual zero-crossing switch is disconnected according to Embodiment 3 of the present invention;

[0027] Figure 8This is the circuit topology diagram before the manual zero-crossing switch is disconnected in Embodiment 4 of the present invention.

[0028] The following is a list of component names represented by the various reference numerals in the attached figures:

[0029] 1-Pull rod, 2-Repulsion disk, 3-Eddy current disk, 4-Connecting rod. Detailed Implementation

[0030] The preferred embodiments of the present invention are described in detail below, and a clear and complete description is provided in conjunction with the accompanying drawings.

[0031] Please see Figure 1 In the diagram: K is the main circuit switch, and its circuit is the main circuit; K0 is the artificial zero-crossing branch switch, C is a capacitor, and L is an inductor. These three are connected in series to form the artificial zero-crossing branch, which is connected in parallel to the main circuit switch K to provide reverse current to the main circuit switch K. The main circuit switch K and the artificial zero-crossing branch switch K0 are two independent switches; capacitor C is connected to an external power source for pre-charging.

[0032] In existing technology, when the main circuit is normal, the main circuit switch K remains closed, and the manual zero-crossing branch switch K0 remains open, allowing current to flow normally through the main circuit. When the main circuit needs to disconnect a faulty line and the main circuit switch K is disconnected, the manual zero-crossing branch switch K0 is first closed, causing it to conduct and release reverse current to the main circuit switch K, thus advancing the zero-crossing time of the current in the main circuit switch K. Then, the main circuit switch K is opened at this zero-crossing time, disconnecting the main circuit and disconnecting the faulty line. Both the main circuit switch K and the manual zero-crossing branch switch K0 independently complete their respective closing and opening actions after receiving their respective closing and opening commands.

[0033] Preferably, the manual zero-crossing branch switch K0 adopts a fast switch, discharge gap GAP, thyristor or IGBT switch.

[0034] Please see Figure 2In the diagram: K1 and K2 are two different opening and closing sections of the same manual zero-crossing switch, C is a capacitor, and L is an inductor. Opening and closing section K1 is considered the main circuit switch and is located on the main circuit. Opening and closing section K2 is considered the manual zero-crossing branch switch, and is connected in series with capacitor C and inductor L to form a manual zero-crossing branch. This manual zero-crossing branch is connected in parallel to opening and closing section K1 to provide reverse current to it. Both opening and closing sections K1 and K2 each contain one stationary contact and one moving contact. Furthermore, the main circuit is connected to the stationary contact of opening and closing section K1 and then exits through the moving contact of opening and closing section K1. A structural component is provided between the moving contacts of opening and closing sections K1 and K2 to allow for their linkage, so that during the opening operation of opening and closing section K1, opening and closing section K2 performs the opposite operation (closing operation).

[0035] In the technical solution of the present invention, when the main circuit is normal, the opening and closing part K1 remains closed and the opening and closing part K2 remains open, and the current in the main circuit flows normally through the main circuit.

[0036] In the technical solution of this invention, when it is necessary to disconnect the main circuit, the main circuit is disconnected by opening and closing part K1, that is, opening and closing part K1 performs a tripping action, while opening and closing part K2 performs a closing action. During this process, after opening and closing part K2 closes to the effective opening distance, an electric arc is generated between the stationary and moving contacts of opening and closing part K2. The artificial zero-crossing branch is connected and releases reverse current to opening and closing part K1, causing the zero-crossing moment of opening and closing part K1 to be advanced. In this way, the electric arc between the stationary and moving contacts in opening and closing part K1 is quickly extinguished at the zero-crossing moment, so that opening and closing part K1 completes the disconnection and realizes the isolation of the faulty circuit. After the arc of the opening and closing section K1 is extinguished, the opening and closing section K1 continues to open, and the opening distance of the opening and closing section K1 is greater than the effective opening distance to prevent the arc between the stationary and moving contacts in the opening and closing section K1 from reigniting; while the opening and closing section K2 continues to close, and as the opening distance of the opening and closing section K2 gradually decreases, the force that causes the stationary and moving contacts of the opening and closing section K2 to quickly close under the action of the arc between the stationary and moving contacts in the opening and closing section K2 accelerates the opening speed of the opening and closing section K1.

[0037] It should be noted that: the opening distance is the distance between the stationary and moving contacts in the same opening and closing part (K1 or K2); the effective opening distance is the distance between the stationary and moving contacts in the same opening and closing part (K1 or K2) that can generate an electric arc when current is present between them. Example

[0038] Please see Figures 3-5 Based on the technical solution of the present invention, this embodiment provides a specific implementation scheme for an artificial zero-crossing switch. Specifically, the artificial zero-crossing switch further includes a pull rod 1, a set of repulsion disks 2, and a set of eddy current disks 3. The pull rod 1 is a structural component that enables the linkage action between the moving contact of the opening / closing part K1 and the moving contact of the opening / closing part K2.

[0039] The moving contacts of the opening / closing section K1 and K2 are respectively located at both ends of the pull rod 1, and both moving contacts move in tandem with the pull rod 1. A circuit is connected between the stationary contacts of the opening / closing section K1 and K2, and a circuit is also connected between the moving contacts of the opening / closing section K1 and K2. Furthermore, a capacitor C and an inductor L are connected in series in the circuit between the stationary contacts of the opening / closing section K1 and K2; or, a capacitor C and an inductor L are connected in series in the circuit between the moving contacts of the opening / closing section K1 and K2.

[0040] Both the repulsion disk 2 and the eddy current disk 3 are coil disks, and the eddy current disk 3 is externally connected to a power source to supply power to it. The repulsion disk 2 is fixedly installed on the rod body of the pull rod 1, while the eddy current disk 3 is fixedly suspended in any direction of the repulsion disk 2, and the eddy current disk 3 is not in fixed contact with the pull rod 1.

[0041] Preferably, the pull rod 1 is made of insulating material to prevent the pull rod 1 from interfering with the repulsion disk 2 and the eddy current disk 3 due to being charged.

[0042] Preferably, the wiring between the moving contacts of the opening and closing parts K1 and K2 is located in the external space of the pull rod 1, which facilitates the maintenance and replacement of the wiring; or, the wiring between the moving contacts of the opening and closing parts K1 and K2 is located in the internal space of the pull rod 1, which avoids the wiring occupying the external space of the pull rod 1 and serves to hide and protect the wiring.

[0043] Preferably, the winding direction of the coil in the repulsive disk 2 is opposite to that of the coil in the eddy current disk 3, and the eddy current disk 3 is suspended above the repulsive disk 2 and fixed. When the eddy current disk 3 is energized, a repulsive magnetic field is generated between the repulsive disk 2 and the eddy current disk 3. The repulsive disk 2 drives the pull rod 1 to move, causing the moving contact of the opening / closing part K1 to move away from the stationary contact of the closing part K1, while the moving contact of the opening / closing part K2 moves closer to and contacts the stationary contact of the opening / closing part K2. That is, the opening / closing part K1 switches from the closed state to the open state, and the opening / closing part K2 switches from the open state to the closed state.

[0044] Preferably, the winding direction of the coil in the repulsive disk 2 is the same as the winding direction of the coil in the eddy current disk 3, and the eddy current disk 3 is suspended below the repulsive disk 2 and fixed. When the eddy current disk 3 is energized, an attractive magnetic field is generated between the repulsive disk 2 and the eddy current disk 3. The repulsive disk 2 drives the pull rod 1 to move, causing the moving contact of the opening / closing part K1 to move away from the stationary contact of the closing part K1, while the moving contact of the opening / closing part K2 moves closer to and contacts the stationary contact of the opening / closing part K2. That is, the opening / closing part K1 switches from the closed state to the open state, and the opening / closing part K2 switches from the open state to the closed state.

[0045] It should be noted that: the eddy current disk 3 is suspended above the repulsion disk 2. "Above" means that, in the direction in which the opening and closing part K1 is opened, the direction is opposite to the direction of movement of the repulsion disk 2; the eddy current disk 3 is suspended below the repulsion disk 2. "Above" means that, in the direction in which the opening and closing part K1 is opened, the direction is the same as the direction of movement of the repulsion disk 2.

[0046] In this embodiment, the specific process of disconnecting the main circuit is as follows:

[0047] First, power is supplied to the eddy current disk 3 by controlling the external power supply of the eddy current disk 3. After the eddy current disk 3 is powered, it establishes a magnetic field. The repulsive disk 2 then establishes its own induced magnetic field by sensing the magnetic field of the eddy current disk 3.

[0048] Secondly, under the influence of the induced magnetic field of the repulsion disk 2 and the magnetic field of the eddy current disk 3, the repulsion disk 2 drives the pull rod 1 to move.

[0049] Finally, the action of lever 1 causes the moving contact of the closing part K1 to move away from the stationary contact of the closing part K1, extinguishing the arc between the stationary and moving contacts. Lever 1 also causes the moving contact of the closing part K2 to move closer to the stationary contact of the closing part K2, causing an arc to ignite between the stationary and moving contacts, ultimately bringing the stationary and moving contacts into contact, completing the opening of the closing part K1. During this process, when the arc ignites between the stationary and moving contacts of the closing part K2, the manual zero-crossing branch is activated and provides a reverse current to the main circuit, causing the closing part K1 to cross zero prematurely, extinguishing the arc between the stationary and moving contacts of the closing part K1. Example

[0050] Please see Figure 6 Based on the technical solution of Embodiment 1, this embodiment provides a specific implementation scheme for a manual zero-crossing switch. That is, the manual zero-crossing switch further includes insulating components (such as insulators or insulating posts), wherein:

[0051] An insulating component is installed between the end of the pull rod 1 and the moving contact provided at that end to separate the end of the pull rod 1 and the moving contact provided at that end so that they do not come into contact with each other.

[0052] Preferably, the pull rod 1 is made of metal or alloy material, which is not limited by whether the material is insulating or not, thus expanding the range of materials that can be selected for the pull rod 1. Example

[0053] Please see Figure 7 Based on the technical solution of the present invention, this embodiment provides a specific implementation scheme for an artificial zero-crossing switch. Specifically, the artificial zero-crossing switch further includes two pull rods 1, two sets of repulsion disks 2, and two sets of eddy current disks 3. The pull rods 1 are structural components that enable linkage between the moving contacts of the opening / closing part K1 and the opening / closing part K2. Specifically:

[0054] The moving contacts of opening / closing part K1 and opening / closing part K2 are respectively disposed at one end of the two pull rods 1, and both moving contacts move in accordance with the movement of their respective pull rods 1. A circuit is connected between the stationary contacts of opening / closing part K1 and opening / closing part K2, and a circuit is also connected between the moving contacts of opening / closing part K1 and opening / closing part K2. Furthermore, a capacitor C and an inductor L are connected in series in the circuit between the stationary contacts of opening / closing part K1 and opening / closing part K2; or, a capacitor C and an inductor L are connected in series in the circuit between the moving contacts of opening / closing part K1 and opening / closing part K2.

[0055] Both the repulsion disk 2 and the eddy current disk 3 are coil disks, and the eddy current disk 3 is externally connected to a power source to supply power to it. The two sets of repulsion disks 2 are fixedly installed on the rods of the two tie rods 1, while the two sets of eddy current disks 3 are fixedly suspended in either direction of the two sets of repulsion disks 2, and the eddy current disks 3 are not in fixed contact with the tie rods 1.

[0056] Preferably, the pull rod 1 is made of insulating material to prevent the pull rod 1 from interfering with the repulsion disk 2 and the eddy current disk 3 due to being charged.

[0057] Preferably, an insulating element is installed between the end of the pull rod 1 and the moving contact provided at that end to separate the end of the pull rod 1 from the moving contact provided at that end, so that they do not come into contact with each other. In this way, the pull rod 1 can be made of metal or alloy material, without being limited by whether the material is insulating or not, thus expanding the range of materials that can be selected for the pull rod 1.

[0058] Preferably, in the pull rod 1, repulsive disk 2, and eddy current disk 3 equipped in the opening / closing part K1, the winding direction of the coil in the repulsive disk 2 is opposite to the winding direction of the coil in the eddy current disk 3, and the eddy current disk 3 is suspended above the repulsive disk 2 and fixed. Similarly, in the pull rod 1, repulsive disk 2, and eddy current disk 3 equipped in the opening / closing part K2, the winding direction of the coil in the repulsive disk 2 is opposite to the winding direction of the coil in the eddy current disk 3, and the eddy current disk 3 is suspended below the repulsive disk 2 and fixed. When the eddy current disk 3 is energized, a repulsive magnetic field is generated between the repulsive disk 2 and its corresponding eddy current disk 3. The repulsive disk 2 drives the pull rod 1 it is mounted on to move, causing the moving contact of the opening / closing part K1 to move away from the stationary contact of the opening / closing part K1, while the moving contact of the opening / closing part K2 moves closer to and contacts the stationary contact of the opening / closing part K2. That is, the opening and closing section K1 switches from the closed state to the open state, and the opening and closing section K2 switches from the open state to the closed state.

[0059] Preferably, in the pull rod 1, repulsive disk 2, and eddy disk 3 provided in the opening and closing part K1, the winding direction of the coil in the repulsive disk 2 is opposite to the winding direction of the coil in the eddy disk 3, and the eddy disk 3 is suspended above the repulsive disk 2 and fixed. In the same way, in the pull rod 1, repulsive disk 2, and eddy disk 3 provided in the opening and closing part K2, the winding direction of the coil in the repulsive disk 2 is the same as the winding direction of the coil in the eddy disk 3, and the eddy disk 3 is suspended above the repulsive disk 2 and fixed. When the eddy current disk 3 is energized, a repulsive magnetic field is generated between the eddy current disk 3 equipped in the opening / closing part K1 and its corresponding repulsive disk 2. The repulsive disk 2 drives the pull rod 1 installed thereon to move, causing the moving contact of the opening / closing part K1 to move away from the stationary contact of the opening / closing part K1. Meanwhile, an attractive magnetic field is generated between the eddy current disk 3 equipped in the opening / closing part K2 and its corresponding repulsive disk 2. The repulsive disk 2 drives the pull rod 1 installed thereon to move, causing the moving contact of the opening / closing part K2 to move closer to and contact the stationary contact of the opening / closing part K2. That is, the opening / closing part K1 switches from the closed state to the open state, and the opening / closing part K2 switches from the open state to the closed state.

[0060] Preferably, in the pull rod 1, repulsive disk 2, and eddy current disk 3 equipped in the opening / closing part K1, the winding direction of the coil in the repulsive disk 2 is the same as the winding direction of the coil in the eddy current disk 3, and the eddy current disk 3 is suspended below the repulsive disk 2 and fixed. Similarly, in the pull rod 1, repulsive disk 2, and eddy current disk 3 equipped in the opening / closing part K2, the winding direction of the coil in the repulsive disk 2 is the same as the winding direction of the coil in the eddy current disk 3, and the eddy current disk 3 is suspended above the repulsive disk 2 and fixed. When the eddy current disk 3 is energized, an attractive magnetic field is generated between the repulsive disk 2 and its corresponding eddy current disk 3. The repulsive disk 2 drives the pull rod 1 it is mounted on to move, causing the moving contact of the opening / closing part K1 to move away from the stationary contact of the opening / closing part K1, while the moving contact of the opening / closing part K2 moves closer to and contacts the stationary contact of the opening / closing part K2. That is, the opening and closing section K1 switches from the closed state to the open state, and the opening and closing section K2 switches from the open state to the closed state.

[0061] Preferably, in the pull rod 1, repulsive disk 2, and eddy disk 3 provided in the opening and closing part K1, the winding direction of the coil in the repulsive disk 2 is the same as the winding direction of the coil in the eddy disk 3, and the eddy disk 3 is suspended below the repulsive disk 2 and fixed. In the pull rod 1, repulsive disk 2, and eddy disk 3 provided in the opening and closing part K2, the winding direction of the coil in the repulsive disk 2 is opposite to the winding direction of the coil in the eddy disk 3, and the eddy disk 3 is suspended below the repulsive disk 2 and fixed. When the eddy current disk 3 is energized, an attractive magnetic field is generated between the eddy current disk 3 equipped in the opening / closing part K1 and its corresponding repulsive disk 2. The repulsive disk 2 drives the pull rod 1 installed thereon to move, causing the moving contact of the opening / closing part K1 to move away from the stationary contact of the opening / closing part K1. Meanwhile, an attractive magnetic field is generated between the eddy current disk 3 equipped in the opening / closing part K2 and its corresponding repulsive disk 2. The repulsive disk 2 drives the pull rod 1 installed thereon to move, causing the moving contact of the opening / closing part K2 to move closer to and contact the stationary contact of the opening / closing part K2. That is, the opening / closing part K1 switches from the closed state to the open state, and the opening / closing part K2 switches from the open state to the closed state.

[0062] Preferably, the two sets of vortex disks 3 are connected in series or in parallel, and are connected to the same power supply that can supply power to the two sets of vortex disks 3.

[0063] It should be noted that: the eddy current disk 3 is suspended above the repulsion disk 2. "Above" means that, in the direction in which the opening and closing part K1 is opened, the direction is opposite to the direction of movement of the repulsion disk 2; the eddy current disk 3 is suspended below the repulsion disk 2. "Above" means that, in the direction in which the opening and closing part K1 is opened, the direction is the same as the direction of movement of the repulsion disk 2.

[0064] In this embodiment, the specific process of disconnecting the main circuit is as follows:

[0065] First, power is supplied to the eddy current disk 3 by controlling the external power supply of the eddy current disk 3. After the eddy current disk 3 is powered, it establishes a magnetic field. The repulsive disk 2 then establishes its own induced magnetic field by sensing the corresponding magnetic field of the eddy current disk 3.

[0066] Secondly, under the influence of the induced magnetic field of the repulsion disk 2 and the magnetic field of the eddy current disk 3, the repulsion disk 2 drives the pull rod 1 to move.

[0067] Finally, the lever 1 of the opening / closing part K1 actuates, causing the moving contact of the opening / closing part K1 to move away from the stationary contact of the opening / closing part K1, thus extinguishing the arc between the stationary and moving contacts. The lever 1 of the opening / closing part K2 actuates, causing the moving contact of the opening / closing part K2 to move closer to the stationary contact of the opening / closing part K2, thus igniting an arc between the stationary and moving contacts, ultimately bringing them into contact and completing the opening / closing of the opening / closing part K1. During this process, when the arc is ignited between the stationary and moving contacts of the opening / closing part K2, the manual zero-crossing branch is activated and provides a reverse current to the main circuit, causing the opening / closing part K1 to cross zero prematurely, extinguishing the arc between the stationary and moving contacts of the opening / closing part K1. Example

[0068] Please see Figure 8 Based on the technical solution of the present invention, this embodiment provides a specific implementation scheme for an artificial zero-crossing switch. Specifically, the artificial zero-crossing switch further includes two pull rods 1, a set of repulsion disks 2, a set of eddy current disks 3, and a connecting rod 4. The pull rods 1 and the connecting rod 4 are structural components that enable linkage between the moving contacts of the opening / closing part K1 and the moving contacts of the opening / closing part K2. Specifically:

[0069] The moving contacts of opening / closing part K1 and opening / closing part K2 are respectively disposed at one end of the two pull rods 1, and both moving contacts move in accordance with the movement of their respective pull rods 1. A circuit is connected between the stationary contacts of opening / closing part K1 and opening / closing part K2, and a circuit is also connected between the moving contacts of opening / closing part K1 and opening / closing part K2. Furthermore, a capacitor C and an inductor L are connected in series in the circuit between the stationary contacts of opening / closing part K1 and opening / closing part K2; or, a capacitor C and an inductor L are connected in series in the circuit between the moving contacts of opening / closing part K1 and opening / closing part K2.

[0070] Both the repulsion disk 2 and the eddy current disk 3 are coil disks, and the eddy current disk 3 is externally connected to a power source to supply power to it. The repulsion disk 2 is fixedly installed on the body of any of the pull rods 1, while the eddy current disk 3 is fixedly suspended in any direction of the repulsion disk 2, and the eddy current disk 3 is not in fixed contact with the pull rod 1.

[0071] The two ends of the connecting rod 4 are respectively hinged to the bodies of the two tie rods 1. The body of the connecting rod 4 has a pivot point, and a hinge rod is hinged to the pivot point, and the position of the hinge rod is fixed. When the tie rod 1 connected to one end of the connecting rod 4 moves, it will drive the connecting rod 4 to rotate around the pivot point, and then the connecting rod 8 will drive the tie rod 1 connected to the other end to move.

[0072] Preferably, the pull rod 1 is made of insulating material to prevent the pull rod 1 from interfering with the repulsion disk 2 and the eddy current disk 3 due to being charged.

[0073] Preferably, an insulating element is installed between the end of the pull rod 1 and the moving contact provided at that end to separate the end of the pull rod 1 from the moving contact provided at that end, so that they do not come into contact with each other. In this way, the pull rod 1 can be made of metal or alloy material, without being limited by whether the material is insulating or not, thus expanding the range of materials that can be selected for the pull rod 1.

[0074] Preferably, when the repulsive disk 2 and the eddy current disk 3 are equipped with the opening / closing part K1, the repulsive disk 2 is fixedly installed on the rod body of the pull rod 1 mounted on the opening / closing part K1. The winding direction of the coil in the repulsive disk 2 is opposite to the winding direction of the coil in the eddy current disk 3, and the eddy current disk 3 is suspended above the repulsive disk 2 and fixed. When the eddy current disk 3 is energized, a repulsive magnetic field is generated between the repulsive disk 2 and the eddy current disk 3. The repulsive disk 2 drives the pull rod 1 mounted on the opening / closing part K1 to move, causing the moving contact of the opening / closing part K1 to move away from the stationary contact of the opening / closing part K1. Under the linkage of the connecting rod 4, the pull rod 1 mounted on the opening / closing part K2 drives the moving contact of the opening / closing part K2 to move closer to and contact the stationary contact of the opening / closing part K2. That is, the opening / closing part K1 switches from the closed state to the open state, and the opening / closing part K2 switches from the open state to the closed state.

[0075] Preferably, when the repulsion disk 2 and the eddy current disk 3 are equipped with the opening / closing part K1, the repulsion disk 2 is fixedly installed on the rod body of the pull rod 1 mounted on the opening / closing part K1. The winding direction of the coil in the repulsion disk 2 is the same as the winding direction of the coil in the eddy current disk 3, and the eddy current disk 3 is suspended below the repulsion disk 2 and fixed. When the eddy current disk 3 is energized, an attractive magnetic field is generated between the repulsion disk 2 and the eddy current disk 3. The repulsion disk 2 drives the pull rod 1 mounted on the opening / closing part K1 to move, causing the moving contact of the opening / closing part K1 to move away from the stationary contact of the opening / closing part K1. Under the linkage of the connecting rod 4, the pull rod 1 mounted on the opening / closing part K2 drives the moving contact of the opening / closing part K2 to move closer to and contact the stationary contact of the opening / closing part K2. That is, the opening / closing part K1 switches from the closed state to the open state, and the opening / closing part K2 switches from the open state to the closed state.

[0076] Preferably, when the repulsive disk 2 and the eddy current disk 3 are equipped with the opening / closing part K2, the repulsive disk 2 is fixedly installed on the rod body of the pull rod 1 mounted on the opening / closing part K2. The winding direction of the coil in the repulsive disk 2 is opposite to the winding direction of the coil in the eddy current disk 3, and the eddy current disk 3 is suspended below the repulsive disk 2 and fixed. When the eddy current disk 3 is energized, a repulsive magnetic field is generated between the repulsive disk 2 and the eddy current disk 3. The repulsive disk 2 drives the pull rod 1 mounted on the opening / closing part K2 to move, causing the moving contact of the opening / closing part K2 to approach and contact the stationary contact of the opening / closing part K2. Under the linkage of the connecting rod 4, the pull rod 1 mounted on the opening / closing part K1 drives the moving contact of the opening / closing part K1 to move away from the stationary contact of the opening / closing part K1. That is, the opening / closing part K1 switches from the closed state to the open state, and the opening / closing part K2 switches from the open state to the closed state.

[0077] Preferably, when the repulsion disk 2 and the eddy current disk 3 are equipped with the opening / closing part K2, the repulsion disk 2 is fixedly installed on the rod body of the pull rod 1 mounted on the opening / closing part K2. The winding direction of the coil in the repulsion disk 2 is the same as the winding direction of the coil in the eddy current disk 3, and the eddy current disk 3 is suspended above the repulsion disk 2 and fixed. When the eddy current disk 3 is energized, an attractive magnetic field is generated between the repulsion disk 2 and the eddy current disk 3. The repulsion disk 2 drives the pull rod 1 mounted on the opening / closing part K2 to move, causing the moving contact of the opening / closing part K2 to approach and contact the stationary contact of the opening / closing part K2. Under the linkage of the connecting rod 4, the pull rod 1 mounted on the opening / closing part K1 drives the moving contact of the opening / closing part K1 to move away from the stationary contact of the opening / closing part K1. That is, the opening / closing part K1 switches from the closed state to the open state, and the opening / closing part K2 switches from the open state to the closed state.

[0078] It should be noted that: the eddy current disk 3 is suspended above the repulsion disk 2. "Above" means that, in the direction in which the opening and closing part K1 is opened, the direction is opposite to the direction of movement of the repulsion disk 2; the eddy current disk 3 is suspended below the repulsion disk 2. "Above" means that, in the direction in which the opening and closing part K1 is opened, the direction is the same as the direction of movement of the repulsion disk 2.

[0079] In this embodiment, the specific process of disconnecting the main circuit is as follows:

[0080] First, power is supplied to the eddy current disk 3 by controlling the external power supply of the eddy current disk 3. After the eddy current disk 3 is powered, it establishes a magnetic field. The repulsive disk 2 then establishes its own induced magnetic field by sensing the corresponding magnetic field of the eddy current disk 3.

[0081] Secondly, under the influence of the induced magnetic field of the repulsion disk 2 and the magnetic field of the eddy current disk 3, the repulsion disk 2 drives the pull rod 1, which is fixedly connected to it, to move. Under the linkage of the connecting rod 4, it drives another pull rod that is not fixedly connected to the repulsion disk 2 to move.

[0082] Finally, the lever 1 of the opening / closing part K1 actuates, causing the moving contact of the opening / closing part K1 to move away from the stationary contact of the opening / closing part K1, thus extinguishing the arc between the stationary and moving contacts. The lever 1 of the opening / closing part K2 actuates, causing the moving contact of the opening / closing part K2 to move closer to the stationary contact of the opening / closing part K2, thus igniting an arc between the stationary and moving contacts, ultimately bringing them into contact and completing the opening / closing of the opening / closing part K1. During this process, when the arc is ignited between the stationary and moving contacts of the opening / closing part K2, the manual zero-crossing branch is activated and provides a reverse current to the main circuit, causing the opening / closing part K1 to cross zero prematurely, extinguishing the arc between the stationary and moving contacts of the opening / closing part K1.

[0083] Based on the above description and accompanying drawings, those skilled in the art can understand and implement this invention. Furthermore, any non-creative modifications made to this invention by those skilled in the art without inventive effort are still within the scope of protection of this invention.

Claims

1. An artificial zero-crossing switch, characterized in that, It includes an opening / closing part K1 installed on the main passage and an opening / closing part K2 installed on the manual zero-crossing branch, and each of them includes a stationary contact and a moving contact: The main circuit route is connected to the stationary contact of the opening and closing part K1 and exited by the moving contact of the opening and closing part K1, so as to control the opening and closing of the main circuit route through the opening and closing part K1. A circuit is connected between the stationary contact of the opening / closing part K1 and the stationary contact of the opening / closing part K2, and a circuit is connected between the moving contact of the opening / closing part K1 and the moving contact of the opening / closing part K2. These two circuits together with the opening / closing part K2 form an artificial zero-crossing branch and are connected in parallel to the opening / closing part K1. The artificial zero-crossing branch is also connected in series with a capacitor that provides reverse current to the opening / closing part K1. A structural component is provided between the moving contact of the opening and closing part K1 and the moving contact of the opening and closing part K2 to enable the two to perform a linkage action, so that during the opening and closing action of the opening and closing part K1, the opening and closing part K2 will perform a closing action accordingly.

2. The artificial zero-crossing switch according to claim 1, characterized in that, It also includes a repulsion disk (2) and a vortex disk (3): The structural component is a pull rod (1), and the moving contact of the opening and closing part K1 and the moving contact of the opening and closing part K2 are respectively set at both ends of the same pull rod (1). The repulsion disk (2) is fixedly installed on the rod body of the pull rod (1), and the vortex disk (3) is fixedly suspended at any disk surface direction of the repulsion disk (2), and the vortex disk (3) is not in fixed contact with the pull rod (1).

3. The artificial zero-crossing switch according to claim 1, characterized in that, It also includes a repulsion disk (2) and a vortex disk (3): The structural component is a tie rod (1), and a tie rod (1) is installed on the moving contact of the opening and closing part K1 and the moving contact of the opening and closing part K2. A set of repulsion disks (2) are fixedly installed on the rod body of each tie rod (1). Each set of repulsion disks (2) is equipped with a set of eddy disks (3). The eddy disks (3) are fixedly suspended at any disk surface direction of the corresponding repulsion disks (2), and the eddy disks (3) are not in fixed contact with the tie rods (1).

4. The artificial zero-crossing switch according to claim 3, characterized in that: Each group of eddy disks (3) is connected in series or in parallel, and is connected to the same power supply that can supply power to each group of eddy disks (3).

5. The artificial zero-crossing switch according to claim 1, characterized in that, It also includes a repulsion disk (2) and a vortex disk (3): The structural components are a pull rod (1) and a connecting rod (4). The moving contact of the opening and closing part K1 and the moving contact of the opening and closing part K2 are each equipped with a pull rod (1). The two ends of the connecting rod (4) are respectively hinged to the rod body of the two pull rods (1). The rod body of the connecting rod (4) is provided with a rotation fulcrum. The repulsion disk (2) is fixedly installed on the rod body of one of the pull rods (1). The vortex disk (3) is fixedly suspended in any direction of the repulsion disk (2). The vortex disk (3) is not in fixed contact with the pull rod (1).

6. The artificial zero-crossing switch according to any one of claims 2-5, characterized in that: The capacitor is connected to an external power source to precharge it. Both the repulsion disk and the eddy current disk (3) are coil disks, and the eddy current disk (3) is connected to a power supply that supplies power to the eddy current disk (3).

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