CN110600999B - A new type of high-voltage and high-current rotary arc switch - Google Patents

Abstract

The invention discloses a novel high-voltage and high-current discharge rotary arc switch, which belongs to the field of pulse power and electrical engineering. The invention adopts a ring electrode design with a transverse cut, and the high-voltage electrode and the ground electrode are designed as coaxial Bruce section structures. The high-voltage electrode is designed with extended wings and double-triggered poles to solve the problems of short life of the rotary arc switch, poor self-breakdown voltage stability, and large trigger delay time jitter; the design of the annular electrode with a transverse cut is greatly reduced. The residence time of the discharge arc reduces the current density of the discharge channel, thereby improving the service life of the high-voltage electrode and the ground electrode, reducing the decomposition and performance degradation of the insulating material caused by the discharge arc, reducing the gas products generated by the decomposition of the insulating material, and prolonging the use of the switch insulation case. life and improve the stability of the switch's self-breakdown voltage; the dual-trigger pole design enables the switch to obtain lower trigger delay time jitter in discharge circuit applications.

Description

A new type of high-voltage and high-current rotary arc switch

technical field

The invention belongs to the technical field of electrical engineering and pulse power, in particular to a high-voltage and high-current discharge rotary arc switch structure.

Background technique

The high-voltage and high-current discharge switch is the core component of the high-power pulse power source or device, and its performance plays a decisive role in the performance index of the pulse power source or device. For a long time, high-voltage and high-current discharge switching technology has been an important research direction in the field of electrical engineering and pulse power technology research. At present, although the thyristor and the ignition tube can withstand a large amount of transferred charge and a long service life, due to their working mechanism and structural design limitations, they cannot withstand a reverse voltage of a relatively high amplitude. Although spark gap switches and field distortion switches have good reverse voltage resistance, they rely on the arc generated by the insulation breakdown between electrodes to form a discharge channel, and long-term arc ablation will lead to changes in the electrode surface state. Changes or even damage to the electrodes, therefore, the amount of charge transferred and the service life are low. The invention solves the problems of high power, large amount of transferred charge, reverse voltage resistance and long life of the discharge switch through special design of the switch structure.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is: in view of the existing problems in the prior art, a method for designing the structure of a high-voltage and high-current discharge rotary arc switch is provided, that is, the main discharge electrode (including the two parts of the high-voltage electrode and the ground electrode) is designed with a transverse cutout The coaxial Bruce profile ring structure, the trigger electrode is designed as a coaxial ring blade electrode installed between the main discharge electrodes, or a needle electrode installed in the ground electrode opening. The cross-section of the high-voltage electrode and the cross-section of the ground electrode should be on both sides of the axis with the switch axis as the axis of symmetry. The guide plates connected to the high voltage electrodes and the guide plates connected to the ground electrodes are respectively installed on both sides of the cross section formed by the transverse cutout and the switch axis. It is used to solve the problems of high power, large transfer charge, reverse voltage resistance and long life of the discharge switch.

The technical scheme adopted in the present invention is as follows:

A new type of high-voltage and high-current rotary arc switch structure, the switch consists of a high-voltage electrode, a ground electrode, a trigger electrode, a deflector, a lead-out end, an outer insulating cylinder, an insulating cover, a gas nozzle and a fastener to dry the gas. or vacuum as the working medium.

The high-voltage electrode and the ground electrode are the main discharge electrodes, which are coaxial cylindrical structures. The high-voltage electrode is a ring-shaped electrode with a transverse notch. Extended rear wing.

The ground electrode is a ring electrode with a transverse cut, and the cross section of the main body of the ring electrode is a Bruce section.

The trigger electrode includes a needle type trigger electrode and a ring-blade type trigger electrode, the needle type trigger electrode is fixed on the trigger electrode support rod introduced from the ground electrode side, and the needle type trigger electrode penetrates the trigger electrode coupling hole on the ground electrode, The end face of the trigger electrode is flush with the side surface of the working gap of the ground electrode or slightly lower than 3mm. The ring-blade trigger electrode is a ring-shaped knife-edge electrode with lateral wings. The diameter of the knife-edge is one-half the diameter of the equipotential line of the working gap Similarly, the lead-out end of the ring-blade trigger electrode is arranged on the ground electrode side.

The guide plate is used to connect the high-voltage electrode and the ground electrode to the lead-out terminal, and the lead-out terminal is used to lead the high-voltage electrode, the ground electrode, and the trigger electrode out of the switch cavity.

In the above technical solution, the transverse notch of the high-voltage electrode and the transverse notch of the ground electrode are on both sides of the axis with the switch axis as the axis of symmetry, and the guide plate connected to the high-voltage electrode and the guide plate connected to the ground electrode are respectively installed in the cross-section. Both sides of the cross section formed by the cutout and the switch axis.

In the above technical solution, when the trigger electrode is triggered by a needle-type trigger electrode, a high-resistance 1/2 voltage divider needs to be connected between the high-voltage electrode and the ground electrode, and the ring-blade trigger electrode is connected to the 1/2-point voltage divider. Connect the middle tap of the voltage regulator, or remove the ring-blade trigger electrode; when the ring-blade trigger electrode is used for triggering, it is necessary to connect the needle-type trigger electrode to the switch ground electrode through a resistor, or remove the needle-type trigger electrode.

In the above technical solution, the main discharge electrode of the switch can work unipolarly or bipolarly. When the switch works in the unipolar working mode, the high-voltage electrode and a capacitor or capacitor bank in the circuit are stored in a The high voltage electrode of the energy storage device is connected to the high voltage electrode of the energy storage device, and the ground electrode is connected to the ground wire terminal or the load input terminal in the circuit. When the switch works in the bipolar operation mode, the high voltage electrode of the switch is connected to the high voltage terminal of the energy storage device, and the ground electrode of the switch is connected to another An opposite polarity charged energy storage device high voltage terminal is connected.

In the above technical solution, when the switch works in the unipolar working mode, if a ring-blade trigger electrode is used, a high-resistance 1/2 voltage divider needs to be connected between the high-voltage electrode and the ground electrode, and the trigger electrode is connected to the ground electrode. The middle tap of the 1/2 voltage divider is connected; if a pin-type trigger electrode is used, the pin-type trigger electrode needs to be connected to the ground electrode through a grounding resistor, and the polarity of the trigger pulse is opposite to that of the charging voltage of the energy storage device.

In the above technical solution, when the switch works in bipolar operation mode, if a ring-blade trigger electrode is used, the trigger electrode needs to be connected to the ground wire through a grounding resistor; A high-resistance 1/2 voltage divider is connected between the electrodes, and the middle tap of the trigger electrode and the 1/2 voltage divider is used as the reference ground terminal, and then the trigger electrode is connected to the reference ground terminal through a grounding resistor. If a needle-type trigger electrode is used, the needle-type trigger electrode needs to be connected to the switch ground electrode through a resistor. The trigger pulse source and the needle-type trigger electrode-ground electrode loop need to be insulated and isolated by a pulse isolation transformer, and the trigger pulse polarity The charging voltage of the energy storage device connected to the high voltage electrode of the switch should be of opposite polarity.

In the above technical solution, the high-voltage electrode, ground electrode, trigger electrode, guide plate, and lead-out end all need to be made of metal materials with low resistivity, low magnetic permeability, and high melting point. Among them, the high-voltage electrode and the ground electrode can be selected But not limited to stainless steel preparation, trigger electrode can be selected but not limited to stainless steel or copper-tungsten alloy preparation, guide plate, lead-out can be selected but not limited to brass, copper or stainless steel preparation.

In the above technical solution, the switch gap is filled with dry gas as the working medium of switch discharge or the switch gap is vacuum, wherein the gas medium can be selected but not limited to dry air, sulfur hexafluoride, nitrogen, carbon dioxide and their mixtures.

The working principle of a high-voltage and high-current discharge rotary arc switch is as follows:

Step 1: The high-voltage electrical pulse generated by the electrical pulse triggering system is fed to the triggering resistor through the triggering pulse transmission cable, and is fed to the triggering electrode of the high-voltage and high-current rotary arc switch through the triggering resistor. When the trigger pulse reaches the trigger electrode, a high potential difference is formed between the trigger electrode and the high-voltage electrode, and then a high-intensity electric field distribution is formed on the surface of the trigger electrode and its adjacent space, so that the surface of the trigger electrode generates a field under the action of the electric field. Electron emission is induced, and the electrons emitted from the surface of the trigger electrode accelerate toward the high-voltage electrode under the action of the electric field in the gap between the trigger electrode, the ground electrode and the high-voltage electrode.

Step 2: When the electrons emitted by the trigger electrode reach the high-voltage electrode, the electrons bombard the surface of the high-voltage electrode to generate anode plasma, and the anode plasma is triggered under the action of the gap electric field between the trigger electrode, the ground electrode (cathode) - the high-voltage electrode (anode) The electrode moves. When the anode plasma reaches the trigger electrode, the ionization degree of the plasma increases rapidly under the action of the current, forming a highly ionized plasma discharge channel, which quickly develops into an arc discharge channel, making the gap between the trigger electrode and the high-voltage electrode. The potential difference decreases rapidly, so that the electric field strength in the gap between the trigger electrode and the ground electrode increases rapidly.

Step 3: When the electric field strength in the gap between the trigger electrode and the ground electrode rises above the breakdown field strength, the gap between the trigger electrode and the ground electrode breaks down, and the ground electrode, the trigger electrode and the high-voltage electrode are ready to pass through. Under the action of the self-magnetic field generated by the discharge current in the gap between the ground electrode and the high-voltage electrode, the discharge plasma is pushed by the Lorentz force and acts in the annular gap between the ground electrode and the high-voltage electrode. Accelerate the movement until the discharge ends.

To sum up, due to the adoption of the above-mentioned technical solutions, the beneficial effects of the present invention are:

1. Through the double trigger electrode combining the ring-blade electrode and the needle electrode designed by the present invention, the switch can be adapted to the unipolar discharge circuit and the bipolar discharge circuit without structural adjustment. At the same time, the ring-blade trigger electrode can greatly reduce the trigger delay time jitter, greatly improve the applicability of the switch to unipolar circuits and bipolar circuits, and the delay time stability, which is used to solve the switch applicability and trigger delay time. Jitter problem.

2. The cross-section of the annular belt and the high-voltage electrode and the ground electrode with the Bruce section configuration are designed in the present invention, so that the electric field distribution in the annular working gap formed by the high-voltage electrode and the ground electrode is approximately uniform field distribution, which effectively improves the Switching stability. The electrode configuration with an annular cross-section and the design of the symmetrical lead-out end make the discharge plasma accelerate circular motion in the annular gap formed by the high-voltage electrode and the ground electrode, and also effectively suppress the convergence effect of the discharge plasma and reduce the discharge plasma. Body-to-electrode ablation. Used to address switch stability and service life issues.

3. The annular working gap coaxial with the switch insulating material casing designed by the present invention, combined with the annular Bruce profile high-voltage electrode with extended guard wings, effectively avoids the irradiation of the discharge light radiation on the switch insulating material casing and reduces the light radiation. The performance of the insulating material is deteriorated, and the contamination of the surface of the insulating material housing by the discharge plasma and metal vapor is greatly reduced, which is used to solve the problem of the service life of the insulating material housing of the high-current discharge switch.

Description of drawings

The invention will be described by way of example and with reference to the accompanying drawings, in which:

Figure 1. Sectional view of the switch;

Figure 2 is a top view of the internal structure of the switch after removing the insulating cover on the high-voltage electrode side of the switch;

Figure 3. Top view of the internal structure of the switch after cutting along the lower edge of the high-voltage electrode tail;

Figure 4 is a top view of the internal structure after cutting along the plane of the trigger needle;

Among them: 1 and 2 are insulating end caps, 3 are high voltage electrodes, 4 are ground electrodes, 5 are needle trigger electrodes, 6 are ring-blade trigger electrodes, 7 are tail wings, 8 and 9 are lead-out terminals, 10 and 11 are is a transverse incision.

Detailed ways

All features disclosed in this specification, or all disclosed steps in a method or process, may be combined in any way except mutually exclusive features and/or steps.

Any feature disclosed in this specification, unless expressly stated otherwise, may be replaced by other equivalent or alternative features serving a similar purpose. That is, unless expressly stated otherwise, each feature is but one example of a series of equivalent or similar features.

As shown in Figures 1-4, it is a schematic diagram of the structure of this embodiment. In this example, the switch is a cylindrical structure, consisting of a high-voltage electrode, a ground electrode, a trigger electrode, a guide plate, a lead-out end, an outer insulating cylinder, and an insulating cover. It is composed of plate, gas nozzle and fastener, and uses dry gas or vacuum as working medium.

The outer insulating cylinder is designed in a cylindrical shape and is made of insulating materials with high insulating strength and good structural strength such as nylon, polyethylene, and plexiglass, and is used to accommodate switching electrodes and insulating gas as a working medium. The insulating cover plate is designed in the shape of a disc, and is made of insulating materials with high insulating strength and good structural strength such as nylon, polyethylene, and plexiglass. It is best to use grooves on the outer end face of the insulating cover plate to improve the creeping insulation strength of the insulating cover plate.

In this embodiment, the main discharge electrode (the high voltage electrode and the ground electrode) is designed with a ring structure, the high voltage electrode and the ground electrode are designed as a coaxial cylindrical structure, the high voltage electrode is fixedly connected to the insulating end cover 1, and the ground electrode is connected to the insulating end cap 1. The end cap 2 is fixedly connected.

In order to constrain the arc, make the discharge arc move according to the design path, and avoid the arc stagnation, the electrode used in this embodiment is not a complete closed-loop structure, but the high-voltage electrode and the ground electrode ring are respectively provided with cross-sections. Cuts 10 and 11, and then connect the high voltage electrode to the lead-out terminal 8 and the ground electrode to the lead-out terminal 9 using a connecting piece. In this way, no matter where a plasma discharge channel appears on the electrode, a directional current will eventually be formed and drawn out from the connecting piece, and there will be no serious ablation of the electrode caused by the stagnation of the arc.

The cross-section of the high-voltage electrode and the cross-section of the ground electrode should be on both sides of the axis with the switch axis as the axis of symmetry. The guide plates connected to the high voltage electrode and the guide plates connected to the ground electrodes are respectively installed on both sides of the cross section formed by the transverse cutout and the switch axis.

The cross section of the ring electrode in this embodiment is a Bruce section, and the electrodes are arranged along the switch axis, so the gap between the high voltage electrode and the ground electrode is still affected by light radiation on the wall surface corresponding to the axial direction. In order to avoid damage to the insulating material by light radiation, a tail 7 connected to the high-voltage electrode is provided at the position where the high-voltage electrode is fixedly connected to the insulating end cap 1. The tail 7 extends radially toward the axis of the ring electrode, and the extended area can cover the The gap between the high voltage electrode and the ground electrode. Therefore, when the discharge between the high voltage electrode and the ground electrode is performed, the arc light will not be irradiated on the inner surface of the insulating end cap 1, thereby solving the problem of decomposition and aging of the insulating material caused by long-time light radiation.

In order to avoid similar problems in the insulating end cover 2 connected to the ground electrode, a radial annular wing is designed at one end of the ring-blade trigger electrode connected to the insulating end cover 2 to shield the arc discharge in the gap between the high voltage electrode and the ground electrode. the arc light so that it cannot be irradiated on the insulating end cover 2.

This embodiment adopts the design of a double trigger electrode structure, and the two trigger electrodes are compatible with each other, including a needle trigger electrode and a ring-blade trigger electrode.

Needle trigger electrode: The trigger electrode support rod is introduced on the ground electrode side to fix and support the needle trigger electrode. The trigger electrode penetrates the trigger electrode coupling hole on the ground electrode, and the end face of the trigger electrode is flush with the side surface of the ground electrode working gap. Not more than 3mm lower.

Ring-blade trigger electrode: The trigger electrode is designed as a ring-shaped blade-edge electrode with lateral wings. The diameter of the blade is the same as or slightly larger than the diameter of the straight section of the equipotential line, which is half of the working gap. The lead-out end of the trigger electrode is designed on the ground electrode side.

When the needle trigger electrode is used for triggering, it is necessary to connect a high-resistance 1/2 voltage divider between the high voltage electrode and the ground electrode, and connect the ring blade trigger electrode to the middle tap of the 1/2 voltage divider, or connect the ring blade to the middle tap of the 1/2 voltage divider. Remove the trigger electrode. When the ring-blade trigger electrode is used for triggering, the needle trigger electrode needs to be connected to the ground electrode of the switch through a resistor, or the needle trigger electrode needs to be removed.

In this embodiment, the high-voltage electrode, ground electrode, trigger electrode, guide plate, and lead-out terminal of the switch all need to be made of metal materials with low resistivity, low magnetic permeability, and high melting point. Among them, the high-voltage electrode and the ground electrode can be selected but not Limited to stainless steel, the trigger electrode can be selected but not limited to stainless steel or copper-tungsten alloy, and the guide plate and the lead end can be selected but not limited to brass, copper or stainless steel. .

When the switch in this embodiment is working, the arc is in a closed space, and the switch gap is filled with dry gas or vacuum as the working medium of the switch discharge, wherein the gas medium can be selected but not limited to dry air, sulfur hexafluoride, nitrogen, carbon dioxide and their mixture.

According to the working principle of the present invention, there are the following specific embodiments:

Example 1

When the switch works in unipolar mode, the high-voltage electrode is connected to the high-voltage electrode of the energy storage device such as capacitors or capacitor banks in the circuit, and the ground electrode is connected to the ground terminal or load input terminal in the circuit. The polarity of the trigger pulse should be the same as that of the storage device. The polarity of the charging voltage of the energy device is reversed. That is, when the energy storage device is charged with positive polarity, the trigger pulse should be a negative voltage pulse; when the energy storage device is charged with negative polarity, the trigger pulse should be a positive voltage pulse. It is recommended to use the energy storage device to work in positive polarity charging mode.

If the ring-blade trigger electrode is used, a high-resistance 1/2 voltage divider should be connected between the high voltage electrode and the ground electrode, and the trigger electrode should be connected with the middle tap of the 1/2 voltage divider.

Embodiment 2

When the switch works in unipolar mode, the high-voltage electrode is connected to the high-voltage electrode of the energy storage device such as capacitors or capacitor banks in the circuit, and the ground electrode is connected to the ground terminal or load input terminal in the circuit. The polarity of the trigger pulse should be the same as that of the storage device. The polarity of the charging voltage of the energy device is reversed. That is, when the energy storage device is charged with positive polarity, the trigger pulse should be a negative voltage pulse; when the energy storage device is charged with negative polarity, the trigger pulse should be a positive voltage pulse. It is recommended to use the energy storage device to work in positive polarity charging mode.

If the needle trigger electrode is used, the needle trigger electrode needs to be connected to the ground electrode through a grounding resistor.

Embodiment 3

When the switch works in bipolar mode, the high voltage electrode of the switch is connected to the high voltage terminal of an energy storage device such as a capacitor or a capacitor bank, and the ground electrode of the switch is connected to the high voltage terminal of another energy storage device charged with opposite polarity; The high voltage terminal of the energy storage device charged with positive polarity is connected, and the ground electrode of the switch is connected with the high voltage terminal of the energy storage device charged with negative polarity. The polarity of the trigger pulse should be opposite to the polarity of the charging voltage of the energy storage device connected to the high voltage electrode of the switch.

The ring-blade trigger electrode is used, and the trigger electrode needs to be connected to the ground wire through a grounding resistor. Use the middle tap of the 1/2 voltage divider as the reference ground terminal, and then connect the trigger electrode to the reference ground terminal through a grounding resistor.

Embodiment 4

When the switch works in bipolar mode, the high voltage electrode of the switch is connected to the high voltage terminal of an energy storage device such as a capacitor or a capacitor bank, and the ground electrode of the switch is connected to the high voltage terminal of another energy storage device charged with opposite polarity; The high voltage terminal of the energy storage device charged with positive polarity is connected, and the ground electrode of the switch is connected with the high voltage terminal of the energy storage device charged with negative polarity. The polarity of the trigger pulse should be opposite to the polarity of the charging voltage of the energy storage device connected to the high voltage electrode of the switch.

If the needle-type trigger electrode is used, the needle-type trigger electrode needs to be connected to the ground electrode of the switch through a resistor, and the pulse isolation transformer should be used for insulation isolation between the trigger pulse source and the needle-type trigger electrode-ground electrode loop.

The present invention is not limited to the foregoing specific embodiments. The present invention extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims (8)

1. a novel high-voltage high-current rotary arc switch structure is characterized in that: The switch is composed of high-voltage electrode, ground electrode, trigger electrode, deflector, lead-out terminal, outer insulating cylinder, insulating cover, gas nozzle and fasteners. Dry gas or vacuum is used as the working medium. The high-voltage electrode and the ground electrode are the main discharge electrodes, which are coaxial cylindrical structures. The high-voltage electrode is a ring-shaped electrode with a transverse notch. extended rear wing, The ground electrode is a ring electrode with a transverse cut, and the cross section of the ring electrode main body is a Bruce section, The trigger electrode includes a needle type trigger electrode and a ring-blade type trigger electrode, the needle type trigger electrode is fixed on the trigger electrode support rod introduced from the ground electrode side, and the needle type trigger electrode penetrates the trigger electrode coupling hole on the ground electrode, The end face of the trigger electrode is flush with the side surface of the working gap of the ground electrode or slightly lower than 3mm; the ring-blade trigger electrode is a ring-shaped knife-edge electrode with lateral wings, and the diameter of the knife-edge is one-half the diameter of the equipotential line of the working gap. In the same way, the lead-out end of the ring-blade trigger electrode is set on the ground electrode side, The guide plate is used to connect the high-voltage electrode and the ground electrode to the lead-out terminal, and the lead-out terminal is used to lead the high-voltage electrode, the ground electrode, and the trigger electrode out of the switch cavity. 2. The structure of a novel high-voltage and high-current rotary arc switch according to claim 1, wherein the cross-sectional cutout of the high-voltage electrode and the cross-sectional cutout of the ground electrode are on both sides of the axis taking the switch axis as the axis of symmetry, connecting the high-voltage The guide plates of the electrodes and the guide plates connected to the ground electrode are each mounted on both sides of the cross section formed by the cross section and the switch axis. 3. The structure of a novel high-voltage and high-current rotary arc switch according to claim 1, characterized in that: when the trigger electrode is triggered by a needle-type trigger electrode, a high-resistance type needs to be connected between the high-voltage electrode and the ground electrode. 1/2 voltage divider and connect the ring-blade trigger electrode to the middle tap of the 1/2 voltage divider, or remove the ring-blade trigger electrode; Connect to the ground electrode of the switch through a resistor, or remove the pin trigger electrode. 4. A novel high-voltage and high-current rotary arc switch structure according to claim 1, characterized in that the main discharge electrode of the switch can work unipolarly or bipolarly, and the switch works in unipolarity In the working mode, the high-voltage electrode is connected to the high-voltage electrode of the energy storage device in the circuit, and the ground electrode is connected to the ground terminal or the load input end in the circuit; when the switch works in the bipolar working mode, the switch high-voltage electrode is connected to a The high voltage terminal of the energy storage device of the capacitor or capacitor bank is connected, and the ground electrode of the switch is connected to the high voltage terminal of another energy storage device charged with opposite polarity. 5. The structure of a novel high-voltage and high-current rotary arc switch according to claim 4, characterized in that: when the switch operates in a unipolar working mode, if a ring-blade trigger electrode is used, it needs to be connected between the high-voltage electrode and the ground. A high-resistance 1/2 voltage divider is connected between the electrodes, and the trigger electrode is connected to the middle tap of the 1/2 voltage divider; if a needle type trigger electrode is used, the needle type trigger electrode needs to be connected to the ground electrode through a grounding resistor ; The polarity of the trigger pulse is opposite to that of the charging voltage of the energy storage device. 6. The structure of a novel high-voltage and high-current rotary arc switch according to claim 4, characterized in that: when the switch operates in a bipolar operating mode, if a ring-blade trigger electrode is used, the trigger electrode needs to pass through a grounding resistance and Ground wire connection; when it cannot be connected to the ground wire, a high-resistance 1/2 voltage divider should be connected between the high voltage electrode and the ground electrode, and the middle tap between the trigger electrode and the 1/2 voltage divider should be used as the reference ground terminal, and then Connect the trigger electrode to the reference ground terminal through a grounding resistor; If a needle-type trigger electrode is used, the needle-type trigger electrode needs to be connected to the switch ground electrode through a resistor. The trigger pulse source and the needle-type trigger electrode-ground electrode loop need to be insulated and isolated by a pulse isolation transformer, and the trigger pulse polarity The charging voltage of the energy storage device connected to the high voltage electrode of the switch should be of opposite polarity. 7. A new type of high-voltage and high-current rotary arc switch structure according to claim 1, characterized in that the high-voltage electrode, ground electrode, trigger electrode, guide plate, and lead-out end all need to adopt low resistivity and low permeability. , high melting point metal material preparation, in which the high-voltage electrode and ground electrode are prepared by one of stainless steel, brass, and copper-tungsten alloy, and the trigger electrode is prepared by one of stainless steel, copper-tungsten alloy, and tungsten-molybdenum alloy. The lead-out end is made of one of brass, red copper and stainless steel. 8. A novel high-voltage and high-current rotary arc switch structure according to claim 1, characterized in that the switch gap is filled with dry gas as the working medium of switch discharge or the switch gap is vacuum, wherein the gas medium is dry air, hexafluoride One or more of sulfur, nitrogen, and carbon dioxide are mixed.

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