High-voltage direct-current pulsed arc generation system and method

Abstract

The invention provides a high-voltage direct-current pulse arc generation system which comprises a power supply module, a controller module, a gap breakdown module, an arc maintenance module and an arc generation module. The power supply module is used for converting accessed alternating current into direct current and providing the converted direct current for the controller module, the gap breakdown module and the arc maintenance module; the controller module is used for controlling the power-on time of the gap breakdown module and the arc maintenance module; the gap breakdown module is used for the arc generation module to break down a gas gap in the module to form an arc; the arc maintaining module is used for maintaining the arc after the arc is formed; the arc generation module is used for accommodating an arc formed after breakdown of gas and gas gaps of the arc generation module. The gap breakdown module is separated from the arc maintenance module, the capacity of the first capacitor can be greatly reduced, the manufacturing cost of the arc generation circuit is reduced, the size and weight of equipment are reduced, and the use safety and reliability of the arc generation circuit are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage arc generators, and in particular to a high-voltage direct current pulse arc generating system and method. Background Art

[0002] As the scale of renewable energy development and utilization continues to expand, production capacity and energy use methods are becoming more diverse. The traditional production capacity method based on fossil energy and the energy transmission and energy use method based on the power grid are changing.

[0003] In recent years, the use and development of clean energy has been vigorously advocated, and the application fields of DC distribution systems have become more and more extensive. DC power supply has the characteristics of high efficiency, easy connection, and small size. It is widely used in photovoltaic power generation systems, high-voltage DC transmission systems, aerospace vehicles, ships, automobiles and other circuit systems. In DC power systems, DC arcs do not have zero crossing and periodic characteristics, so DC arcs are not easy to extinguish, which can cause fires and endanger the safety of the entire power network. In particular, when there are flammable materials around the point where the arc fault occurs, the arc will ignite the flammable materials and cause a major fire. The aging of the insulation of the line and the electronic components, as well as the looseness of the connection parts in the circuit, are all direct causes of DC arc faults.

[0004] The most obvious feature of a DC arc is that it does not have the "flat shoulder feature" of an AC arc. In addition, a DC arc is a highly random process, and its location and time of occurrence are unpredictable. Due to the complex physical process of the arc gap, the arc current and voltage do not have a fixed functional expression, which makes the volt-ampere characteristics of a DC arc highly nonlinear. In the circuit structure, the fault arc can be regarded as a nonlinear resistor element. The temperature of a DC arc is usually higher than that of an AC arc, but the arc temperature is generally not easy to measure, and the data obtained vary greatly depending on the measurement method. However, it is now known that the arc temperature is greatly affected by the current. Increasing the current will increase the arc temperature, and the temperature is closely related to the burning and extinction process of the arc. The power supply of a DC power supply system is usually a constant voltage source, so that once the arc occurs, it is easier to maintain long-term burning, and the arc temperature and energy are greater. In addition, DC arcs mainly occur in new energy systems such as photovoltaics and wind power, and the environment is complex. The formation of its DC arc is affected by a variety of environmental factors, making the fault arc waveform complex, and it is difficult to summarize all arc characteristics with one law. By inventing an arc generating device to analyze the properties of DC arcs under different currents, it is of great significance to study the breaking performance of switching electrical appliances, improve the breaking capacity of switches, and explore the protection of personnel under air arcs. Summary of the invention

[0005] The purpose of the present invention is to provide a high voltage DC pulse arc generating system to address the defects of the prior art, comprising:

[0006] A power supply module, a controller module, a gap breakdown module, an arc maintenance module and an arc generation module;

[0007] The power supply module is used to convert the input alternating current into direct current, and provide the converted direct current to the controller module, the gap breakdown module, and the arc maintenance module;

[0008] The controller module is used to preset the power-on time of the gap breakdown module and the power-on time of the arc maintenance module according to the characteristics of the gas in the gap to be broken down;

[0009] The gap breakdown module is used to generate a gas gap breakdown voltage;

[0010] The arc generating module has a gas gap in it, and an arc is formed in the arc generating module after the gas gap is broken down by the gas gap breakdown voltage;

[0011] The arc maintaining module is used to maintain the arc after the arc is formed.

[0012] Furthermore, the power supply module includes a filter and rectifier circuit, a voltage regulating circuit, an inverter and transformer circuit, and a diode rectifier circuit; the filter and rectifier circuit is used to rectify AC power into DC power; the voltage regulating circuit converts the voltage of the DC power obtained by a part of the filter and rectifier circuit into a voltage for supplying power to the controller; the inverter and transformer circuit converts the DC power obtained by another part of the filter and rectifier circuit into AC power, and then converts the voltage of the AC power into a voltage for supplying power to the gap breakdown module and the arc maintaining module; the diode rectifier circuit converts the transformed AC power obtained by the inverter and transformer circuit into DC power to supply power to the gap breakdown module and the arc maintaining module.

[0013] Furthermore, the AC power signal input end of the filtering and rectifying circuit is used to be connected to the AC input end, the DC power signal output end of the filtering and rectifying circuit is connected to the DC power signal input end of the voltage regulating circuit, the voltage regulating DC power signal output end of the voltage regulating circuit is connected to the power signal input end of the controller module, the DC power signal output end of the filtering and rectifying circuit is also connected to the DC power signal input end of the inverter transformer circuit, the AC power signal output end of the inverter transformer circuit is connected to the AC power signal input end of the diode rectifier circuit, the first DC power signal output end of the diode rectifier circuit is connected to the gap breakdown module, and the second DC power signal output end of the diode rectifier circuit is connected to the arc maintaining module.

[0014] Furthermore, the controller is one of an STM32 digital processing circuit, a DSP digital processing circuit, and an FPGA digital processing circuit.

[0015] Furthermore, the gap breakdown module includes a first capacitor, a first transistor, a current limiting resistor, and a pulse transformer;

[0016] The first capacitor is used to store direct current from the power supply module until it reaches a first voltage threshold preset by the controller module;

[0017] The first transistor is used to receive a signal from the controller module to control the circuit opening and closing of the gap breakdown module, and the first transistor is a fully controlled switch element;

[0018] The current limiting resistor is used to limit the peak value of the current generated by the first capacitor;

[0019] The pulse transformer is used to boost the voltage from the first capacitor to form a voltage pulse and apply it to both ends of the arc generating module.

[0020] Furthermore, the gap breakdown module also includes a first diode, a second diode, and a third diode; the first diode is used to share the current flowing through the pulse transformer after the first transistor is closed; the second diode is used to ensure that the current generated when the first capacitor is discharged and the second capacitor is still discharged will not pass through the pulse transformer; the third diode is used to ensure that the current in the charging circuit of the first capacitor will not flow in the reverse direction.

[0021] Furthermore, the first transistor is an IGBT;

[0022] One end of the first capacitor is connected to the collector of the first transistor, the gate of the first transistor is connected to the circuit opening and closing control signal output end of the controller module, the emitter of the first transistor is connected to one end of the current limiting resistor, the other end of the current limiting resistor is connected to the cathode of the first diode, the anode of the first diode is connected to the other end of the first capacitor, one end of the primary of the pulse transformer coil is connected to the cathode of the first diode, the other end of the primary of the pulse transformer coil is connected to the anode of the first diode, one end of the secondary of the pulse transformer coil is connected to the anode of the second diode, the cathode of the second diode is connected to one end of the arc generating module, and the other end of the secondary of the pulse transformer coil is connected to the other end of the arc generating module;

[0023] Among them, one end of the first capacitor is connected to the low-voltage power supply end of the first DC power supply signal of the power supply module, the positive electrode of the third diode is connected to the high-voltage power supply end of the first DC power supply signal of the power supply module, and the negative electrode of the third diode is connected to the other end of the first capacitor.

[0024] Further, the arc maintaining module includes a second capacitor, an adjustable resistor and a second triode;

[0025] The second capacitor is used to store direct current from the power supply module until it reaches a second voltage threshold preset by the controller module;

[0026] The adjustable resistor is used to adjust the peak value of the current generated by the second capacitor;

[0027] The second transistor is used to receive a signal from the controller module to control the opening and closing of the circuit of the arc maintaining module, and the second transistor is a fully controlled switch element.

[0028] Furthermore, the arc maintaining module further includes a fourth diode and a fifth diode, wherein the fourth diode is used to isolate the voltage pulse generated by the pulse transformer;

[0029] The fifth diode is used to ensure that the current in the charging circuit of the second capacitor does not flow in the reverse direction.

[0030] Further, the second transistor is an IGBT; the gate of the second transistor is connected to the circuit opening and closing control signal output end of the controller module, the collector of the second transistor is connected to one end of the arc generating module, the emitter of the second transistor is connected to one end of the second capacitor, the other end of the second capacitor is connected to one end of the adjustable resistor, the other end of the adjustable resistor is connected to the positive electrode of the fourth diode, and the negative electrode of the fourth diode is connected to the other end of the arc generating module;

[0031] Among them, one end of the second capacitor is connected to the low-voltage power supply end of the second DC power supply signal of the power supply module, the positive electrode of the fifth diode is connected to the high-voltage power supply end of the second DC power supply signal of the power supply module, and the negative electrode of the fifth diode is connected to the other end of the second capacitor.

[0032] A method for generating a high-voltage direct current pulse arc, comprising:

[0033] Connecting the power supply module of the DC pulse arc generating circuit to AC power, and setting the charging voltage of the first capacitor and the second capacitor, the trigger type, the conduction delay, the conduction time, the conduction frequency and the conduction duty cycle of the first transistor and the second transistor by the power supply module according to the characteristics of the gas in the gap to be broken down through the controller module;

[0034] After detecting that the first capacitor and the second capacitor are charged to a given voltage through the power supply module 1, the controller module gives a stop charging signal, and the power supply module stops charging;

[0035] After the controller module triggers the first transistor, the voltage generated by the first capacitor is stepped up by the pulse transformer to form a voltage pulse which is applied to both ends of the arc generating module. When the applied voltage exceeds the breakdown voltage of the gas at both ends of the arc generating module, the gas in the arc generating module is broken down, thereby forming an arc.

[0036] After the arc is formed, the controller module controls the first transistor to turn off, the second transistor to trigger, and the current generated by the second capacitor flows through the adjustable resistor, the fourth diode, the arc generation module, and the second transistor to maintain the arc in the arc generation module.

[0037] When the controller module controls the first transistor and the second transistor to turn off, the arc between the gases in the arc generating module disappears.

[0038] The beneficial effects of the present invention are:

[0039] 1. The present invention separates the gap breakdown module from the arc maintaining module, which can significantly reduce the capacity of the first capacitor while meeting functional indicators, which is beneficial to reducing the manufacturing cost of the arc generating circuit, reducing the volume and weight of the equipment, and improving the safety and reliability of the arc generating circuit.

[0040] 2. The present invention adopts a fully controlled element as a switching element, which can conveniently adjust the pulse width and period of the output arc. The presence of the first diode can provide a freewheeling function for the pulse transformer, suppress the overvoltage caused by the sudden change of the winding current, and improve the operating frequency of the device.

[0041] 3. Since the present invention can significantly reduce the stored energy of the first capacitor, it is easier to protect the load when it ignites, thereby improving the safety of the voltage pulse power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 Schematic diagram of the structure of the circuit in the embodiment of the present invention.

[0043] Figure 2 The basic structure and connection block diagram of the power supply module in the embodiment of the present invention.

[0044] Figure 3 for Figure 2 Further details are given in the structure and connection diagram.

[0045] Figure 4 This is a connection block diagram of the gap breakdown module and the arc maintenance module.

[0046] Figure markings: 1-power supply module; 2-controller module; 3-gap breakdown module; 301-first capacitor; 302-first transistor; 303-current limiting resistor; 304-first diode; 305-pulse transformer; 306-second diode; 307-third diode; 4-arc maintaining module; 401-second capacitor; 402-adjustable resistor; 403 fourth diode; 404-second transistor; 405-fifth diode; 5-arc generating module. DETAILED DESCRIPTION

[0047] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0048] Example 1

[0049] refer to Figure 1-4 , a high voltage DC pulse arc generating system, comprising:

[0050] A power supply module 1, a controller module 2, a gap breakdown module 3, an arc maintenance module 4 and an arc generation module 5;

[0051] The power supply module 1 is used to convert the incoming alternating current into direct current, and provide the converted direct current to the controller module 2, the gap breakdown module 3, and the arc maintenance module 4;

[0052] The controller module 2 is used to preset the power-on time of the gap breakdown module 3 and the power-on time of the arc maintenance module 4 according to the characteristics of the gas in the gap to be broken down;

[0053] The gap breakdown module 3 is used to generate a gas gap breakdown voltage;

[0054] The arc generating module 5 has a gas gap in it, and an arc is formed in the arc generating module 5 after the gas gap is broken down by the gas gap breakdown voltage;

[0055] The arc maintaining module 4 is used to maintain the arc after the arc is formed.

[0056] (1) The power supply module 1 includes a filter rectifier circuit, a voltage regulator circuit, an inverter transformer circuit, and a diode rectifier circuit;

[0057] The filtering and rectifying circuit is used to rectify the alternating current into direct current;

[0058] The voltage regulating circuit converts the voltage of the DC power obtained by a part of the filtering and rectifying circuit into a voltage for supplying power to the controller module 2;

[0059] The inverter transformer circuit converts the DC power obtained by the other part of the filter and rectifier circuit into AC power, and then converts the voltage of the AC power into a voltage for supplying power to the gap breakdown module 3 and the arc maintenance module 4;

[0060] The diode rectifier circuit converts the transformed alternating current obtained by the inverter transformer circuit into direct current to supply power to the gap breakdown module 3 and the arc maintenance module 4 .

[0061] The AC power signal input end of the filtering and rectifying circuit is used to be connected to the AC input end, the DC power signal output end of the filtering and rectifying circuit is connected to the DC power signal input end of the voltage regulating circuit, the voltage regulating DC power signal output end of the voltage regulating circuit is connected to the power signal input end of the controller module, the DC power signal output end of the filtering and rectifying circuit is also connected to the DC power signal input end of the inverter transformer circuit, the AC power signal output end of the inverter transformer circuit is connected to the AC power signal input end of the diode rectifier circuit, the first DC power signal output end of the diode rectifier circuit is connected to the gap breakdown module, and the second DC power signal output end of the diode rectifier circuit is connected to the arc maintaining module.

[0062] Since the controller module 2, the gap breakdown module 3 and the arc maintenance module 4 are all powered by the power supply module 1, but the voltages required by each are different, the voltages of the respective branches are adjusted again to realize separate voltage supplies respectively.

[0063] (2) The controller 2 is one of an STM32 digital processing circuit, a DSP digital processing circuit, and an FPGA digital processing circuit.

[0064] The STM32 digital processing circuit is a 32-bit series of microcontrollers produced by ST (STMicroelectronics) using ARM's cortex-M3 as the core.

[0065] DSP digital processing circuit refers to a chip that can implement digital signal processing technology.

[0066] FPGA digital processing circuit is a field programmable gate array.

[0067] (3) The gap breakdown module 3 includes a first capacitor 301, a first transistor 302, a current limiting resistor 303, a first diode 304, a pulse transformer 305, a second diode 306 and a third diode 307;

[0068] The first capacitor 301 is used to store direct current from the power supply module 1 until it reaches a first voltage threshold preset by the controller module 2;

[0069] The first transistor 302 is used to receive the signal of the controller module 2 to control the circuit opening and closing of the gap breakdown module 3. The first transistor 302 is a fully controlled switch element;

[0070] The current limiting resistor 303 is used to limit the peak value of the current generated by the first capacitor 301;

[0071] The first diode 304 is used to share the current flowing through the pulse transformer 305 after the first transistor 302 is closed, reducing the impact voltage caused by the first transistor 302 being turned off, and helping the magnetic core of the pulse transformer 305 to return to zero, thereby improving the utilization rate of the magnetic core and increasing the operating frequency;

[0072] The pulse transformer 305 is used to boost the voltage from the first capacitor 301 to form a voltage pulse (20-30 kV) and apply it to both ends of the arc generating module 5;

[0073] The second diode 306 is used to ensure that the current generated when the first capacitor 301 finishes discharging and the second capacitor 401 is still discharging will not pass through the pulse transformer 305;

[0074] The third diode 307 is used to ensure that the current in the charging circuit of the first capacitor 301 does not flow in the reverse direction.

[0075] The first transistor 302 is specifically an IGBT.

[0076] One end of the first capacitor 301 is connected to the collector of the first transistor 302, the gate of the first transistor 302 is connected to the circuit opening and closing control signal output end of the controller module 2, the emitter of the first transistor 302 is connected to one end of the current limiting resistor 303, the other end of the current limiting resistor 303 is connected to the cathode of the first diode 304, the anode of the first diode 304 is connected to the other end of the first capacitor 301, one end of the primary of the pulse transformer 305 coil is connected to the cathode of the first diode 304, the other end of the primary of the pulse transformer 305 coil is connected to the anode of the first diode 304, one end of the secondary of the pulse transformer 305 coil is connected to the anode of the second diode 306, the cathode of the second diode 306 is connected to one end of the arc generating module 5, and the other end of the secondary of the pulse transformer 305 coil is connected to the other end of the arc generating module 5;

[0077] Among them, one end of the first capacitor 301 is connected to the low-voltage power supply end of the first DC power supply signal of the power supply module 1, the positive electrode of the third diode 307 is connected to the high-voltage power supply end of the first DC power supply signal of the power supply module 1, and the negative electrode of the third diode 307 is connected to the other end of the first capacitor 301.

[0078] By using a fully controlled element as a switching element, the pulse width and period of the output arc can be conveniently adjusted, and the presence of the first diode 304 can provide a freewheeling function for the pulse transformer, suppress overvoltage caused by sudden changes in winding current, and increase the operating frequency of the device.

[0079] Since the gap breakdown module 3 and the arc maintaining module 4 are separated, the capacity of the first capacitor 301 can be greatly reduced while meeting the functional indicators, which is beneficial to reducing the production cost of the arc generating circuit, reducing the size and weight of the equipment, and improving the safety and reliability of the arc generating circuit.

[0080] Since the stored energy of the first capacitor 301 can be greatly reduced, it is easier to protect the load when a fire occurs, thereby improving the safety of the voltage pulse power supply.

[0081] (4) The arc maintaining module 4 includes a second capacitor 401, an adjustable resistor 402, a fourth diode 403, a second triode 404 and a fifth diode 405;

[0082] The second capacitor 401 is used to store the direct current from the power supply module 1 until it reaches a second voltage threshold preset by the controller module 2;

[0083] The adjustable resistor 402 is used to adjust the peak value of the current generated by the second capacitor 401;

[0084] The second transistor 404 is used to receive the signal of the controller module 2 to control the circuit opening and closing of the arc maintaining module 4, and the second transistor 404 is a fully controlled switch element;

[0085] The fourth diode 403 is used to isolate the voltage pulse generated by the pulse transformer 305 and protect the second capacitor 401 and the second transistor 404;

[0086] The fifth diode 405 is used to ensure that the current in the charging circuit of the second capacitor 401 does not flow in the reverse direction;

[0087] The second triode 404 is specifically an IGBT, the gate of the second triode 404 is connected to the circuit opening and closing control signal output end of the controller module 2, the collector of the second triode 404 is connected to one end of the arc generating module 5, the emitter of the second triode 404 is connected to one end of the second capacitor 401, the other end of the second capacitor 401 is connected to one end of the adjustable resistor 402, the other end of the adjustable resistor 402 is connected to the positive electrode of the fourth diode 403, and the negative electrode of the fourth diode 403 is connected to the other end of the arc generating module 5;

[0088] Among them, one end of the second capacitor 401 is connected to the low-voltage power supply end of the second DC power supply signal of the power supply module 1, the positive electrode of the fifth diode 405 is connected to the high-voltage power supply end of the second DC power supply signal of the power supply module 1, and the negative electrode of the fifth diode 405 is connected to the other end of the second capacitor 401.

[0089] (5) The working principle and process of the present invention are as follows:

[0090] When the present invention is powered by 220V AC power, the present invention enters a standby state. In the standby state, the charging voltage of the first capacitor 301 and the second capacitor 401, the trigger type of the first transistor 302 and the second transistor 404 can be set by the controller module 2. Among them, the trigger types that can be set in the controller module 2 include single trigger, multiple trigger and periodic trigger, and the conduction delay, conduction time, conduction frequency and conduction duty cycle of each switch can be set.

[0091] After the charging voltage of the first capacitor 301 and the second capacitor 401 is set in the controller module 2, charging can be started. After the controller module 2 detects that the first capacitor 301 and the second capacitor 401 are charged to a given voltage through the power supply module 1, the controller module 2 gives a stop charging signal, and the power supply module 1 stops charging.

[0092] Through the control of the controller module 2, after the circuit of the present invention starts working, the first transistor 302 and the second transistor 404 are triggered according to the trigger type of the first transistor 302 and the second transistor 404 set in the controller module 2 in the standby state. When the arc generating module 5 is not broken down, the resistance between the gaps can be regarded as infinite. After the first transistor 302 is triggered, the voltage of the first capacitor 301 is boosted by the pulse transformer 305 to form a voltage pulse applied to both ends of the arc generating module 5. When the applied voltage exceeds the breakdown voltage of the gas at both ends of the arc generating module 5, the gas in the arc generating module 5 is broken down. After the gas in the arc generating module 5 is broken down, the resistance between the gases in the arc generating module 5 drops sharply to a lower value, which depends on the medium between the arc generating modules 5. Due to the existence of the current pulse transformer 305, the current formed between the arc generating modules 5 by the boost and breakdown of the pulse transformer 305 is small, and it is difficult to form a stable arc. Since the resistance between the gases in the arc generating module 5 is reduced and the second triode 404 is triggered, the current generated by the second capacitor 401 flows through the adjustable resistor 402, the fourth diode 403, the arc generating module 5, and the second triode 404 to ensure that the arc continues to exist. After the second triode 404 is triggered, the first triode 302 is disconnected. Since the moment of breakdown is not easy to control, the first triode 302 is generally closed after the second triode 404 is triggered for a period of time. The second diode 306 can ensure that the large current generated when the first capacitor 301 is discharged and the second capacitor 401 is still discharged will not pass through the pulse transformer 305, causing damage to the pulse transformer 305. The peak value of the current generated by the second capacitor 401 can be achieved by adjusting the adjustable resistor 402. The fourth diode 403 can isolate the voltage pulse formed by the pulse transformer 305 to protect the second capacitor 401 and the second triode 404. The arc maintenance time formed between the arc generating modules 5 is basically determined by the parameters of the second capacitor 401 and the conduction time of the second triode 404.

[0093] When the first transistor 302 and the second transistor 404 are turned off, the arc between the gases in the arc generating module 5 disappears. Stop working or enter the next working cycle according to the settings in the controller module 2. After the first transistor 302 is turned off, due to the existence of the winding inductance, the sudden change of the current of the pulse transformer 305 winding will form a higher impact voltage on the winding, which may cause damage to the pulse transformer 305. The first diode 304 provides a buffer path for the current of the pulse transformer 305 winding. After the first transistor 302 is turned off, the current of the pulse transformer 305 winding will flow through the first diode 304 and decay slowly, reducing the impact voltage caused by the shutdown of the first transistor 302, and helping the magnetic core of the pulse transformer 305 to return to zero, improve the utilization rate of the magnetic core, and increase the operating frequency.

[0094] The arc current is composed of the current formed by the first capacitor 301 and the current formed by the second capacitor 401. Due to the presence of the pulse transformer 305, the current formed by the first capacitor 301 in the arc generating module 5 is much smaller than the current formed by the second capacitor 401. After ignoring the stray parameters of the circuit and the current formed by the first capacitor 301, during the time t when the second transistor 404 is turned on, the arc current satisfies the following expression:

[0095]

[0096] Wherein, I is the arc current of the arc generating module 5, U 401 is the charging voltage of the second capacitor 401, R is the sum of the resistance of the adjustable resistor 402 and the arc resistance of the arc generating module, C 401 is the capacitance value of the second capacitor 401. Arc current peak value I PEAK Satisfies the following expression:

[0097]

[0098] Example 2

[0099] A method for generating a high-voltage direct current pulse arc, comprising:

[0100] The characteristics of the gas in the gap to be broken down set the charging voltage of the power supply module 1 to the first capacitor 301 and the second capacitor 401, the trigger type, the conduction delay, the conduction time, the conduction frequency and the conduction duty cycle of the first transistor 302 and the second transistor 404;

[0101] After detecting that the first capacitor 301 and the second capacitor 401 are charged to a given voltage through the power supply module 1, the controller module 2 gives a stop charging signal, and the power supply module 1 stops charging;

[0102] After the controller module 2 triggers the first transistor 302, the voltage generated by the first capacitor 301 is boosted by the pulse transformer 305 to form a voltage pulse which is applied to both ends of the arc generating module 5. When the applied voltage exceeds the breakdown voltage of the gas at both ends of the arc generating module 5, the gas in the arc generating module 5 is broken down, thereby forming an arc.

[0103] After the arc is formed, the controller module 2 controls the first transistor 302 to turn off, the second transistor 404 is triggered, and the current generated by the second capacitor 401 flows through the adjustable resistor 402, the fourth diode 403, the arc generating module 5, and the second transistor 404, so as to maintain the arc in the arc generating module 5;

[0104] When the controller module 2 controls the first transistor 302 and the second transistor 404 to turn off, the arc between the gases in the arc generating module 5 disappears.

[0105] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A high voltage DC pulse arc generating system, characterized in that: include: A power supply module (1), a controller module (2), a gap breakdown module (3), an arc maintenance module (4) and an arc generation module (5); The power supply module (1) is used to convert the input alternating current into direct current, and provide the converted direct current to the controller module (2), the gap breakdown module (3), and the arc maintenance module (4); The controller module (2) is used to preset the power-on time of the gap breakdown module (3) and the power-on time of the arc maintenance module (4) according to the characteristics of the gas in the gap to be broken down; The gap breakdown module (3) is used to generate a gas gap breakdown voltage; The arc generating module (5) has a gas gap in it, and after the gas gap is broken down by the gas gap breakdown voltage, an arc is formed in the arc generating module (5); The arc maintaining module (4) is used to maintain the arc after the arc is formed.

2. The high voltage DC pulse arc generating system according to claim 1, characterized in that: The power supply module (1) comprises a filtering and rectifying circuit, a voltage regulating circuit, an inverter transformer circuit, and a diode rectifying circuit; The filtering and rectifying circuit is used to rectify the alternating current into direct current; The voltage regulating circuit converts the voltage of a portion of the direct current obtained by the filtering and rectifying circuit into a voltage for supplying power to the controller module (2); The inverter transformer circuit converts the direct current obtained by the other part of the filter rectifier circuit into alternating current, and then converts the voltage of the alternating current into a voltage for supplying power to the gap breakdown module (3) and the arc maintenance module (4); The diode rectifier circuit converts the transformed alternating current obtained by the inverter transformer circuit into direct current to supply power to the gap breakdown module (3) and the arc maintenance module (4).

3. The high voltage DC pulse arc generating system according to claim 2, characterized in that: The AC power signal input end of the filtering and rectifying circuit is used to be connected to the AC input end, the DC power signal output end of the filtering and rectifying circuit is connected to the DC power signal input end of the voltage regulating circuit, the voltage regulating DC power signal output end of the voltage regulating circuit is connected to the power signal input end of the controller module (2), the DC power signal output end of the filtering and rectifying circuit is also connected to the DC power signal input end of the inverter transformer circuit, the AC power signal output end of the inverter transformer circuit is connected to the AC power signal input end of the diode rectifier circuit, the first DC power signal output end of the diode rectifier circuit is connected to the gap breakdown module (3), and the second DC power signal output end of the diode rectifier circuit is connected to the arc maintenance module (4).

4. The high voltage DC pulse arc generating system according to claim 3, characterized in that: The gap breakdown module (3) comprises a first capacitor (301), a first transistor (302), a current limiting resistor (303), and a pulse transformer (305); The first capacitor (301) is used to store direct current from the direct current power signal output end of the power supply module (1) until it reaches a first voltage threshold preset by the controller module (2); The first transistor (302) is used to receive a circuit opening and closing control signal from the controller module (2) to control the circuit opening and closing of the gap breakdown module (3); the first transistor (302) is a fully controlled switch element; The current limiting resistor (303) is used to limit the peak value of the current generated by the first capacitor (301); The pulse transformer (305) is used to boost the voltage from the first capacitor (301) to form a voltage pulse which is applied to both ends of the arc generating module (5).

5. The high voltage DC pulse arc generating system according to claim 4, characterized in that: The gap breakdown module (3) further comprises a first diode (304), a second diode (306), and a third diode (307); The first diode (304) is used to share the current flowing through the pulse transformer (305) after the first transistor (302) is closed; The second diode (306) is used to ensure that the current generated when the first capacitor (301) finishes discharging and the second capacitor (401) is still discharging will not pass through the pulse transformer (305); The third diode (307) is used to ensure that the current in the charging circuit of the first capacitor (301) does not flow in the reverse direction.

6. The high voltage DC pulse arc generating system according to claim 5, characterized in that: The first transistor (302) is an IGBT; One end of the first capacitor (301) is connected to the collector of the first triode (302), the gate of the first triode (302) is connected to the circuit opening and closing control signal output end of the controller module (2), the emitter of the first triode (302) is connected to one end of the current limiting resistor (303), the other end of the current limiting resistor (303) is connected to the negative electrode of the first diode (304), the positive electrode of the first diode (304) is connected to the other end of the first capacitor (301), one end of the primary of the pulse transformer (305) coil is connected to the negative electrode of the first diode (304), the other end of the primary of the pulse transformer (305) coil is connected to the positive electrode of the first diode (304), one end of the secondary of the pulse transformer (305) coil is connected to the positive electrode of the second diode (306), the negative electrode of the second diode (306) is connected to one end of the arc generating module (5), and the other end of the secondary of the pulse transformer (305) coil is connected to the other end of the arc generating module (5); One end of the first capacitor (301) is connected to the low-voltage power supply end of the first DC power supply signal of the power supply module (1), the positive electrode of the third diode (307) is connected to the high-voltage power supply end of the first DC power supply signal of the power supply module (1), and the negative electrode of the third diode (307) is connected to the other end of the first capacitor (301).

7. The high voltage DC pulse arc generating system according to claim 3, characterized in that: The arc maintaining module (4) comprises a second capacitor (401), an adjustable resistor (402) and a second triode (404); The second capacitor (401) is used to store direct current from the direct current power signal output end of the power supply module (1) until it reaches a second voltage threshold preset by the controller module (2); The adjustable resistor (402) is used to adjust the peak value of the current generated by the second capacitor (401); The second transistor (404) is used to receive a circuit opening and closing control signal from the controller module (2) to control the circuit opening and closing of the arc maintaining module (4); the second transistor (404) is a fully controlled switch element.

8. The high voltage DC pulse arc generating system according to claim 7, characterized in that: The arc maintaining module (4) further comprises a fourth diode (403) and a fifth diode (405); The fourth diode (403) is used to isolate the voltage pulse generated by the pulse transformer (305); The fifth diode (405) is used to ensure that the current in the charging circuit of the second capacitor (401) does not flow in the reverse direction.

9. The high voltage DC pulse arc generating system according to claim 8, characterized in that: The second transistor (404) is an IGBT; The gate of the second triode (404) is connected to the circuit opening and closing control signal output end of the controller module (2), the collector of the second triode (404) is connected to one end of the arc generating module (5), the emitter of the second triode (404) is connected to one end of the second capacitor (401), the other end of the second capacitor (401) is connected to one end of the adjustable resistor (402), the other end of the adjustable resistor (402) is connected to the positive electrode of the fourth diode (403), and the negative electrode of the fourth diode (403) is connected to the other end of the arc generating module (5); One end of the second capacitor (401) is connected to the low-voltage power supply end of the second DC power supply signal of the power supply module (1), the positive electrode of the fifth diode (405) is connected to the high-voltage power supply end of the second DC power supply signal of the power supply module (1), and the negative electrode of the fifth diode (405) is connected to the other end of the second capacitor (401).

10. A high-voltage DC pulse arc generating method using the high-voltage DC pulse arc generating system according to any one of claims 1 to 9, characterized in that: include: The power supply module (1) of the DC pulse arc generating circuit is connected to an alternating current, and the charging voltage of the first capacitor (301) and the second capacitor (401), the trigger type, the conduction delay, the conduction time, the conduction frequency and the conduction duty ratio of the first triode (302) and the second triode (404) are set by the power supply module (1) according to the characteristics of the gas in the gap to be broken down. After detecting that the first capacitor (301) and the second capacitor (401) are charged to a given voltage through the power supply module (1), the controller module (2) gives a charging stop signal, and the power supply module (1) stops charging; After the controller module (2) triggers the first triode (302), the voltage generated by the first capacitor (301) is stepped up by the pulse transformer (305) to form a voltage pulse which is applied to both ends of the arc generating module (5); when the applied voltage exceeds the breakdown voltage of the gas at both ends of the arc generating module (5), the gas in the arc generating module (5) is broken down, thereby forming an arc; After the arc is formed, the controller module (2) controls the first triode (302) to be turned off, the second triode (404) to be triggered, and the current generated by the second capacitor (401) flows through the adjustable resistor (402), the fourth diode (403), the arc generating module (5), and the second triode (404), so as to maintain the arc in the arc generating module (5) to continue to exist; When the controller module (2) controls the first triode (302) and the second triode (404) to be turned off, the arc between the gases in the arc generating module (5) disappears.

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