A high efficiency multi-point arc discharge device and method

Abstract

Disclosed is a high-efficiency multi-point arc discharge device: a multi-point arc discharge device of N-stage improved Marx circuit is composed of first to 2N suppression discharge diodes (101-1, 101-2,..., 101-2N), first to N discharge capacitors (102-1, 102-2,..., 102-N), first to N(N+1) / 2 discharge electrode pairs (103-1, 103-2,..., 103-N(N+1) / 2) and first to N(N-1) / 2 high-voltage relay resistors (104-1, 104-2,..., 104-N(N-1) / 2). The multi-point pulse spark discharge working process of the device is also given. The present application can realize multi-point spark discharge under low input voltage, fully utilize power storage, improve excitation efficiency, produce multi-point excitation and meet the requirements of plasma application field.

Description

Technical Field

[0001] This invention is applied to plasma applications such as plasma flow control and ignition-assisted combustion, and specifically relates to a high-efficiency multi-point pulse spark discharge device and method. Background Technology

[0002] Plasma, as the fourth state of matter, possesses both fluid and conductor properties, enabling the rapid conversion of electrical energy into heat energy, thus achieving numerous functions such as flow control and ignition / combustion enhancement. To forcibly transform a gas from an insulator into plasma, a high-voltage discharge method must be used to break down the air. Different discharge methods produce different types of plasma. Spark plasmas, due to their large discharge current and high power, exhibit better performance in flow control and ignition / combustion enhancement, showing great application potential.

[0003] However, spark-type plasma exhibits negative impedance characteristics during discharge, meaning that the voltage decreases as the discharge current increases. This prevents flow control and ignition / combustion actuators designed based on arc-type plasma from being directly connected in parallel. Connecting multiple actuators in series would increase the required breakdown voltage exponentially. At high voltages, the insulation level of the conductors must be increased, significantly increasing the size and weight of the power supply system. Simultaneously, abnormal discharges caused by high voltage in the transmission lines under low-voltage conditions also limit the input voltage. Therefore, achieving multi-point arc discharge using a lower input voltage becomes a challenge. However, whether for ignition / combustion or flow control, multi-point excitation produces far superior effects than single-point excitation due to higher excitation efficiency and a wider effective area. Therefore, efficiently achieving multi-point excitation and generating multi-point discharge under low voltage has always been a hot and difficult research topic.

[0004] In summary, current plasma discharge methods suffer from difficulties in achieving multi-point spark discharge and generating multi-point excitation under low input voltage conditions, thus failing to meet the requirements for plasma flow control and ignition / combustion-aiding applications with multi-point excitation. Summary of the Invention

[0005] To address the problems of high breakdown voltage and limited number of discharge channels in current plasma discharge methods, this invention proposes a high-efficiency multi-point arc discharge device, as detailed below:

[0006] The multi-point arc discharge device of the N-level improved Marx circuit includes the first to the second Nth suppression discharge diodes (101-1, 101-2, ..., 101-2N), the first to the Nth discharge capacitors (102-1, 102-2, ..., 102-N), the first to the Nth (N+1) / 2 discharge electrode pairs (103-1, 103-2, ..., 103-N(N+1) / 2), and the first to the Nth (N-1) / 2 high-voltage relay resistors (104-1, 104-2, ..., 104-N(N-1) / 2).

[0007] Every two suppression discharge diodes and one capacitor form a first-stage boost unit in the Marx circuit, and the number of boost units in the Marx circuit is no less than 2; the first suppression discharge diode 101-1, the first discharge capacitor 102-1, and the fifth suppression discharge diode 101-5 are connected in series to form a first-stage boost unit; the second suppression discharge diode 101-2, the second discharge capacitor 102-2, and the sixth suppression discharge diode 101-6 form a second-stage boost unit; ...; the Nth suppression discharge diode 101-N, the Nth discharge capacitor 102-N, and the 2Nth suppression discharge diode 101-2N form the Nth-stage boost unit; in each boost unit, Both suppression diodes are connected in the same direction in the circuit; the low potential terminal of the first discharge capacitor 102-1 in the first-stage boost unit and the high potential terminal of the second discharge capacitor 102-2 in the second-stage boost unit are connected to the first discharge electrode pair 103-1, forming the first-stage discharge module; the low potential terminal of the second discharge capacitor 102-2 in the second-stage boost unit and the high potential terminal of the third discharge capacitor 102-3 in the third-stage boost unit are connected in series with the second discharge electrode pair 103-2 and the third discharge electrode pair 103-3, forming the second-stage discharge module; one end of the first high-voltage relay resistor 104-1 is connected to the second discharge electrode pair 103-2 and the third discharge electrode pair 103-3. The third discharge electrode pair 103-3 is connected at the junction point 3-3, and the other end is connected to the high potential end of the third discharge capacitor 102-3. The low potential end of the third discharge capacitor 102-3 in the third-stage boost unit and the high potential end of the fourth discharge capacitor 102-4 in the fourth-stage boost unit are connected in series with the fourth discharge electrode pair 103-4, the fifth discharge electrode pair 103-5, and the sixth discharge electrode pair 103-6, forming the third-stage discharge module. Similarly, the junction points of adjacent discharge electrode pairs are connected to the high potential end of the fourth discharge capacitor 102-4 through a high-voltage relay resistor. Specifically, one end of the second high-voltage relay resistor 104-2 is connected to the fifth discharge electrode pair 103-5 and the sixth discharge electrode pair 103-6. The third high-voltage relay resistor 104-3 is connected at one end to the junction of the fourth discharge electrode pair 103-4 and the fifth discharge electrode pair 103-5, and at the other end to the high-potential end of the fourth discharge capacitor 102-4. The low-potential end of the fourth discharge capacitor 102-4 in the fourth stage boost unit and the high-potential end of the first discharge capacitor 102-1 in the first stage boost unit are connected in series with the seventh discharge electrode pair 103-7, the eighth discharge electrode pair 103-8, the ninth discharge electrode pair 103-9, and the tenth discharge electrode pair 103-10 to form the fourth stage discharge module. And so on.Similarly, the junctions of adjacent discharge electrode pairs are all connected to the high-potential end of the first discharge capacitor 102-1 via a high-voltage relay resistor. Specifically, one end of the fourth high-voltage relay resistor 104-4 is connected to the junction of the seventh discharge electrode pair 103-7 and the eighth discharge electrode pair 103-8, and the other end is connected to the high-potential end of the first discharge capacitor 102-1; one end of the fifth high-voltage relay resistor 104-5 is connected to the junction of the eighth discharge electrode pair 103-8 and the ninth discharge electrode pair 103-9, and the other end is connected to the high-potential end of the first discharge capacitor 102-1; one end of the sixth high-voltage relay resistor 104-6 is connected to the junction of the ninth discharge electrode pair 103-9 and the tenth discharge electrode pair 103-10, and the other end is connected to the high-potential end of the first discharge capacitor 102-1; and so on.

[0008] The high potential terminals of the first, second, ..., and Nth suppressor discharge diodes (101-1, 101-2, 101-3, 101-4) are all connected to the positive terminal of the power supply; the low potential terminals and the negative terminal of the power supply of the N+1, N+2, N+3, and N+4 suppressor discharge diodes (101-5, 101-6, 101-7, 101-8) are grounded.

[0009] In one specific embodiment of the present invention, N = 4.

[0010] In one embodiment of the present invention, the power supply 105 is a high-voltage pulse input source, and the voltage amplitude range of the pulse source output is 2 to 10 kV; the frequency is 0.01 to 10 kHz.

[0011] In another embodiment of the invention,

[0012] The withstand voltage of the discharge suppression diode 101-N is related to the amplitude U of the high voltage pulse input to power supply 105 and the number of Marx circuit stages m; the withstand voltage of the discharge suppression diode 101-N should not be less than m*U;

[0013] The withstand voltage of discharge capacitor 102-N should not be less than the amplitude U of the high voltage pulse input to power supply 105, and the capacitance value range is 0.1~100nF;

[0014] The withstand voltage of the high-voltage relay resistor 104-N is the same as that of the discharge suppression diode 101-N, and the resistance value is 500~10KΩ;

[0015] The electrode gap between the discharge electrodes and 103-N is related to the discharge environment and the input high voltage 104, ranging from 0.5 to 5 mm. Utilizing the characteristic of the Marx circuit to increase voltage step by step, the increase in gap becomes more determined by the discharge environment with each additional Marx discharge unit.

[0016] In another specific embodiment of the present invention

[0017] The capacitance of the discharge capacitor 102-N is 10nF;

[0018] The resistance of the 104-N high-voltage relay resistor is 1kΩ;

[0019] The electrode gap between the discharge electrodes and the 103-N electrode is 1 mm; the discharge gap increases by 50% for each additional Marx discharge unit.

[0020] The working process of the multi-point pulse spark discharge of the above-mentioned high-efficiency multi-point arc discharge device is as follows:

[0021] For the multi-point arc discharge device of the 4-stage improved Marx circuit, when a high-voltage pulse is input, the discharge capacitor 102-N is in the charging stage, and the voltage across its terminals continuously increases. Therefore, the voltage across the discharge module also increases simultaneously. Since the first-stage discharge module has only one discharge electrode pair 103-1, and the electrode spacing is minimal, the first-stage discharge module reaches the breakdown condition earliest, causing the air between the first discharge electrode pair 103-1 to break down, and the air changes from an insulator to a conductor. At this time, the low potential terminal of the first discharge capacitor 102-1 in the first-stage boost unit and the second voltage terminal in the second-stage boost unit... The high-potential end of discharge capacitor 102-2 is connected through the plasma channel formed by the discharge. Because the impedance of the plasma channel is very small, the high-potential end of the second discharge capacitor 102-2 will have the same potential as the low-potential end of the first discharge capacitor 102-1. At this time, since the diode cannot conduct in reverse, neither the first discharge capacitor 102-1 nor the second discharge capacitor 102-2 can release energy, and the potential difference across the capacitors still exists. Therefore, the low-potential end of the second discharge capacitor 102-2 will decrease synchronously. The high-potential end of the third discharge capacitor 102-3 in the third-stage boost unit... Since the terminal voltage remains constant, the voltage across the second-stage discharge module will increase synchronously. Because the air gaps between the second discharge electrode pair 103-2 and the third discharge electrode pair 103-3 are not broken down and are in a high-resistance state (impedance much greater than the first high-voltage relay resistor 104-1), the voltage across the second-stage discharge module will be applied to the second discharge electrode pair 103-2, causing the air gap in the second discharge electrode pair 103-2 to break down and conduct. When the second discharge electrode pair 103-2 breaks down, the impedance changes from being much higher than the first high-voltage relay resistor 104-1 to being much lower than the first high-voltage relay resistor 104-1. The voltage across the second-stage discharge module 104-1 is applied to the third discharge electrode pair 103-3, causing it to break down and conduct. Similarly, the fourth to tenth discharge electrode pairs 103-4, 103-5, 103-6, 103-7, 103-8, 103-9, and 103-10 will break down and conduct. Once all electrode pairs are conducting, all capacitors will switch from parallel charging to series discharging, thereby injecting energy and generating plasma excitation. When the pulse high-voltage input is cut off, the discharge ends, waiting for the next pulse to trigger a new round of discharge, thus generating pulsed multi-point discharge.

[0022] This invention proposes a coupled, highly reliable multi-point pulse spark discharge device and method based on Marx circuit step-by-step voltage boosting and impedance-controlled sequential breakdown, which realizes large-spacing multi-point discharge under low voltage conditions, providing efficient multi-point excitation for applications such as plasma flow control and ignition-assisted combustion.

[0023] Compared to traditional discharge methods, the high-efficiency multi-point pulse spark discharge method proposed in this invention utilizes the step-by-step voltage boosting function of the Marx circuit to multiply the input voltage, reducing dependence on high input voltage. It employs impedance regulation to apply the multiplied high voltage step-by-step to the discharge unit, achieving multi-point discharge while effectively increasing the discharge spacing and improving discharge efficiency. Based on this method, multi-point spark discharge can be achieved under low input voltage conditions, fully utilizing the power supply's energy storage and generating multi-point excitation while improving excitation efficiency, thus meeting the needs of plasma application fields. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the multi-point pulse spark discharge principle of the present invention;

[0025] Figure 2 This is a schematic diagram of the working process of the multi-point pulse spark discharge of the present invention.

[0026] Figure label:

[0027] 101-1, 101-2, 101-3, 101-4, 101-5, 101-6, 101-7, 101-8 — First to eighth discharge suppression diodes

[0028] 102-1, 102-2, 102-3, 102-4 — First to fourth discharge capacitors

[0029] 103-1, 103-2, 103-3, 103-4, 103-5, 103-6, 103-7, 103-8, 103-9, 103-10 — First to tenth discharge electrode pairs

[0030] 104-1, 104-2, 104-3, 104-4, 104-5, 104-6 — First to sixth high-voltage relay resistors; 105 — Power supply. Detailed Implementation

[0031] To achieve the above objectives, this invention provides a highly efficient multi-point pulse spark discharge method. Its technical feature is that it couples the Marx boost circuit with the impedance-controlled discharge method. By adding one stage to the Marx boost circuit, the number of discharge channels and the distance between discharge electrodes increase accordingly, thereby achieving the goal of highly efficient multi-point discharge.

[0032] For ease of explanation, this invention uses a 4-stage improved Marx circuit as an example. Other stages of the discharge device can be easily extended and implemented based on the principles of this invention.

[0033] The multi-point arc discharge device of the 4-stage improved Marx circuit consists of the first to eighth suppression discharge diodes (101-1, 101-2, ..., 101-8), the first to fourth discharge capacitors (102-1, 102-2, 102-3, 102-4), the first to tenth discharge electrode pairs (103-1, 103-2, ..., 103-10), and the first to sixth high-voltage relay resistors (104-1, 104-2, ..., 104-6).

[0034] Two suppression discharge diodes and one capacitor form one stage of the boost unit in a Marx circuit. Typically, the number of boost units in a Marx circuit is no less than two. For example, the first suppression discharge diode 101-1, the first discharge capacitor 102-1, and the fifth suppression discharge diode 101-5 are connected in series to form one stage of the boost unit. Note that the two suppression discharge diodes are connected in the same direction in the circuit. In this invention, the first suppression discharge diode 101-1, the first discharge capacitor 102-1, and the fifth suppression discharge diode 101-5 form the first stage boost unit; the second suppression discharge diode 101-2, the second discharge capacitor 102-2, and the sixth suppression discharge diode 101-6 form the second stage boost unit; the third suppression discharge diode 101-3, the third discharge capacitor 102-3, and the seventh suppression discharge diode 101-7 form the third stage boost unit; and the fourth suppression discharge diode 101-4, the fourth discharge capacitor 102-4, and the eighth suppression discharge diode 101-8 form the fourth stage boost unit. In the first-stage boost unit, the low-potential terminal of the first discharge capacitor 102-1 and the high-potential terminal of the second discharge capacitor 102-2 in the second-stage boost unit are connected to the first discharge electrode pair 103-1, forming the first-stage discharge module. In the second-stage boost unit, the low-potential terminal of the second discharge capacitor 102-2 and the high-potential terminal of the third discharge capacitor 102-3 in the third-stage boost unit are connected in series to the second discharge electrode pair 103-2 and the third discharge electrode pair 103-3, forming the second-stage discharge module. To provide discharge stability, one end of the first high-voltage relay resistor 104-1 is connected to the junction of the second discharge electrode pair 103-2 and the third discharge electrode pair 103-3, and the other end is connected to the high-potential terminal of the third discharge capacitor 102-3. In the third-stage boost unit, the low-potential end of the third discharge capacitor 102-3 and the high-potential end of the fourth discharge capacitor 102-4 in the fourth-stage boost unit are connected in series with the fourth discharge electrode pair 103-4, the fifth discharge electrode pair 103-5, and the sixth discharge electrode pair 103-6, forming the third-stage discharge module. Similarly, to provide discharge stability, the junctions of adjacent discharge electrode pairs are connected to the high-potential end of the fourth discharge capacitor 102-4 via a high-voltage relay resistor. Specifically, one end of the second high-voltage relay resistor 104-2 is connected to the junction of the fifth discharge electrode pair 103-5 and the sixth discharge electrode pair 103-6, and the other end is connected to the high-potential end of the fourth discharge capacitor 102-4; one end of the third high-voltage relay resistor 104-3 is connected to the junction of the fourth discharge electrode pair 103-4 and the fifth discharge electrode pair 103-5, and the other end is connected to the high-potential end of the fourth discharge capacitor 102-4.The low potential end of the fourth discharge capacitor 102-4 in the fourth stage boost unit and the high potential end of the first discharge capacitor 102-1 in the first stage boost unit are connected in series with the seventh discharge electrode pair 103-7, the eighth discharge electrode pair 103-8, the ninth discharge electrode pair 103-9, and the tenth discharge electrode pair 103-10 to form the fourth stage discharge module. Similarly, to provide discharge stability, the junctions of adjacent discharge electrode pairs are connected to the high-potential end of the first discharge capacitor 102-1 via a high-voltage relay resistor. Specifically, one end of the fourth high-voltage relay resistor 104-4 is connected to the junction of the seventh discharge electrode pair 103-7 and the eighth discharge electrode pair 103-8, and the other end is connected to the high-potential end of the first discharge capacitor 102-1; one end of the fifth high-voltage relay resistor 104-5 is connected to the junction of the eighth discharge electrode pair 103-8 and the ninth discharge electrode pair 103-9, and the other end is connected to the high-potential end of the first discharge capacitor 102-1; one end of the sixth high-voltage relay resistor 104-6 is connected to the junction of the ninth discharge electrode pair 103-9 and the tenth discharge electrode pair 103-10, and the other end is connected to the high-potential end of the first discharge capacitor 102-1.

[0035] The high potential terminals of the first, second, third, and fourth suppression discharge diodes (101-1, 101-2, 101-3, and 101-4) are all connected to the positive terminal of the power supply; the low potential terminals and the negative terminal of the power supply of the fifth, sixth, seventh, and eighth suppression discharge diodes (101-5, 101-6, 101-7, and 101-8) are grounded.

[0036] In one embodiment of the present invention, the power supply 105 is a high-voltage pulse input source, and the voltage amplitude range of the pulse source output is 2 to 10kV, preferably 3kV; the frequency is 0.01 to 10kHz, preferably 100Hz.

[0037] The withstand voltage of the suppression discharge diode 101-N is related to the amplitude U of the high-voltage pulse input to power supply 105 and the number of Marx circuit stages m. To ensure reliability, the withstand voltage of the suppression discharge diode 101-N should not be less than m*U; for example, in this case, the amplitude of the high-voltage pulse input to power supply 105 is 3kV and the number of stages is 4, then the withstand voltage of the suppression discharge diode 101-N should not be less than 12kV.

[0038] The withstand voltage of the discharge capacitor 102-N should not be less than the amplitude U of the high voltage pulse input to the power supply 105, and the capacitance value should be in the range of 0.1 to 100 nF, preferably 10 nF.

[0039] The withstand voltage of the high-voltage relay resistor 104-N is the same as that of the discharge suppression diode 101-N, and the resistance value is 500~10KΩ, preferably 1kΩ.

[0040] The discharge electrode pair 103-N is generally made of metallic material, and the electrode shape is not limited. The main parameter is the gap between the two electrodes. The electrode gap is related to the discharge environment and the input high voltage 104, ranging from 0.5 to 5 mm, preferably 1 mm. To improve discharge efficiency, utilizing the step-by-step voltage increase characteristic of the Marx circuit, the gap increase is determined according to the discharge environment for each additional Marx discharge unit, preferably 50%. For example, if the gap between the first-stage discharge electrode pair 103-1 is 2 mm, then the electrode gap between the electrode pairs 103-2 and 103-3 in the second-stage discharge unit can be set to 3 mm.

[0041] like Figure 2As shown, the multi-point pulse spark discharge operation process of the discharge device of the present invention is as follows: When a high-voltage pulse is input, the discharge capacitor 102-N is in the charging stage, and the voltage across its terminals continuously increases. Therefore, the voltage across the discharge module also increases simultaneously. Since the first-stage discharge module has only one discharge electrode pair 103-1 and the electrode spacing is minimal, the first-stage discharge module reaches the breakdown condition earliest, causing the air between the first electrode pair 103-1 to break down, and the air changes from an insulator to a conductor. At this time, the low-potential end of the first discharge capacitor 102-1 in the first-stage boost unit and the high-potential end of the second discharge capacitor 102-2 in the second-stage boost unit are connected through the plasma channel formed by the discharge. Since the impedance of the plasma channel is very small, the potential of the high-potential end of the second discharge capacitor 102-2 will be the same as the potential of the low-potential end of the first discharge capacitor 102-1. At this time, since the diode cannot conduct in reverse, neither the first discharge capacitor 102-1 nor the second discharge capacitor 102-2 can release energy, and the potential difference across the capacitors still exists. Therefore, the potential of the low-potential end of the second discharge capacitor 102-2 will decrease synchronously. In the third-stage boost unit, the high-potential voltage of the third discharge capacitor 102-3 remains constant, therefore the voltage across the second-stage discharge module will increase synchronously. Since the air gaps between the second discharge electrode pair 103-2 and the third discharge electrode pair 103-3 are not broken down and are in a high-resistance state (impedance much greater than the first high-voltage relay resistor 104-1), the voltage across the second-stage discharge module will be applied to the second discharge electrode pair 103-2, causing the air gap in the second discharge electrode pair 103-2 to break down and conduct. When the second discharge electrode pair 103-2 breaks down, its impedance changes from being much higher than the first high-voltage relay resistor 104-1 to being much lower than the first high-voltage relay resistor 104-1. At this point, the voltage across the second-stage discharge module will be applied to the third discharge electrode pair 103-3, causing it to break down and conduct. Similarly, the fourth to tenth discharge electrode pairs (103-4, 103-5, 103-6, 103-7, 103-8, 103-9, and 103-10) will break down and conduct. Once all electrode pairs are conducting, all capacitors will switch from parallel charging to series discharging, thereby injecting energy and generating plasma excitation. When the pulsed high-voltage input is cut off, the discharge ends, awaiting the next pulse to trigger a new round of discharge, thus generating pulsed multi-point discharge. Specific Implementation

[0043] See Figure 1The high-efficiency multi-point pulse spark discharge device of the present invention consists of a suppression discharge diode (101-N), a discharge capacitor (102-N), a high-voltage relay resistor (104-N), a discharge electrode pair (103-N), and a power supply 105. The first suppression discharge diode 101-1, the first discharge capacitor 102-1, and the fifth suppression discharge diode 101-5 are connected in series to form a first-stage boost unit; the second suppression discharge diode 101-2, the second discharge capacitor 102-2, and the sixth suppression discharge diode 101-6 are connected in series to form a second-stage boost unit; the third suppression discharge diode 101-3, the third capacitor 102-3, and the seventh suppression discharge diode 101-7 are connected in series to form a third-stage boost unit; and the fourth suppression discharge diode 101-4, the fourth discharge capacitor 102-4, and the eighth suppression discharge diode 101-8 are connected in series to form a fourth-stage boost unit. In the first-stage boost unit, the low-potential terminal of the first capacitor 102-1 and the high-potential terminal of the second capacitor 102-2 in the second-stage boost unit are connected in series with the first discharge electrode pair 103-1 to form the first-stage discharge. In the second-stage boost unit, the low-potential terminal of the second capacitor 102-2 and the high-potential terminal of the third capacitor 102-3 in the third-stage boost unit are connected in series with the second discharge electrode pair 103-2 and the third discharge electrode pair 103-3 to form the second-stage discharge module. One end of the high-voltage relay resistor 104-1 is connected to the junction of the second discharge electrode pair 103-2 and the third discharge electrode pair 103-3, and the other end is connected to the high-potential terminal of the third discharge capacitor 102-3. In the third-stage boost unit, the low-potential terminal of the third discharge capacitor 102-3 and the high-potential terminal of the fourth discharge capacitor 102-4 in the fourth-stage boost unit are connected in series with the fourth discharge electrode pair 103-4, the fifth discharge electrode pair 103-5, and the sixth discharge electrode pair 103-6 to form the third-stage discharge module. The junctions of adjacent discharge electrode pairs are connected to the high-potential end of the fourth discharge capacitor 102-4 via a high-voltage relay resistor. The low-potential end of the fourth discharge capacitor 102-4 in the fourth-stage boost unit and the high-potential end of the first discharge capacitor 102-1 in the first-stage boost unit are connected in series with the seventh to tenth discharge electrode pairs 103-7, 103-8, 103-9, and 103-10 to form the fourth-stage discharge module. The junctions of adjacent discharge electrode pairs are also connected to the high-potential end of the first discharge capacitor 102-1 via a high-voltage relay resistor. The high-voltage pulse input source voltage is 3kV, and the frequency is 100Hz; the withstand voltage of the discharge suppression diode 101-N is 30kV; the withstand voltage of the discharge capacitor 102-N is 4kV, and the capacitance is 10nF; the withstand voltage of the high-voltage relay resistor 104-N is 30kV, and the resistance is 1kΩ; the discharge electrode pair 103-N is composed of copper electrodes with an electrode gap of 1mm.

Claims

1. A high-efficiency multi-point arc discharge device, characterized in that, Specifically as follows: The multi-point arc discharge device of the N-level improved Marx circuit includes the first to the second Nth suppression discharge diodes (101-1, 101-2, ..., 101-2N), the first to the Nth discharge capacitors (102-1, 102-2, ..., 102-N), the first to the Nth (N+1) / 2 discharge electrode pairs (103-1, 103-2, ..., 103-N(N+1) / 2), and the first to the Nth (N-1) / 2 high-voltage relay resistors (104-1, 104-2, ..., 104-N(N-1) / 2). Two suppression discharge diodes and one discharge capacitor form one stage boost unit in the Marx circuit, and the number of boost units in the Marx circuit is not less than 2; the first suppression discharge diode (101-1), the first discharge capacitor (102-1), and the (N+1)th suppression discharge diode (101-(N+1)) are connected in series to form one stage boost unit; the second suppression discharge diode (101-2), the second discharge capacitor (102-2), and the (N+2)th suppression discharge diode (101-(N+2)) form the second stage boost unit; ...; the Nth suppression discharge diode (101-N), the Nth discharge capacitor (102-N), and the 2Nth suppression discharge diode (101-(N+2)) form the second stage boost unit; ... The discharge diodes (101-2N) form the Nth stage boost unit; in each stage boost unit, the two suppression discharge diodes are connected in the same direction in the circuit; the low potential terminal of the first discharge capacitor (102-1) in the first stage boost unit and the high potential terminal of the second discharge capacitor (102-2) in the second stage boost unit are connected to the first discharge electrode pair (103-1) to form the first stage discharge module; the low potential terminal of the second discharge capacitor (102-2) in the second stage boost unit and the high potential terminal of the third discharge capacitor (102-3) in the third stage boost unit are connected in series with the second discharge electrode pair (103-2) and the third discharge electrode pair (103-3). This forms the second-stage discharge module; one end of the first high-voltage relay resistor (104-1) is connected to the junction of the second discharge electrode pair (103-2) and the third discharge electrode pair (103-3), and the other end is connected to the high-potential end of the third discharge capacitor (102-3); the low-potential end of the third discharge capacitor (102-3) in the third-stage boost unit and the high-potential end of the fourth discharge capacitor (102-4) in the fourth-stage boost unit are connected in series with the fourth discharge electrode pair (103-4), the N+1th discharge electrode pair (103-(N+1s)), and the N+2th discharge electrode pair (103-(N+2)), forming the third-stage discharge module; similarly, adjacent The junction of each discharge electrode pair is connected to the high potential end of the fourth discharge capacitor (102-4) through a high-voltage relay resistor. Specifically, one end of the second high-voltage relay resistor (104-2) is connected to the junction of the N+1 discharge electrode pair (103-(N+1)) and the N+2 discharge electrode pair (103-(N+2)), and the other end is connected to the high potential end of the fourth discharge capacitor (102-4); one end of the third high-voltage relay resistor (104-3) is connected to the junction of the fourth discharge electrode pair (103-4) and the N+1 discharge electrode pair (103-(N+1)), and the other end is connected to the high potential end of the fourth discharge capacitor (102-4).The low potential end of the fourth discharge capacitor (102-4) in the fourth stage boost unit and the high potential end of the first discharge capacitor (102-1) in the first stage boost unit are connected in series with the N+3 discharge electrode pair (103-(N+3)), the N+4 discharge electrode pair (103-(N+4)), the N+5 discharge electrode pair (103-9), and the N+6 discharge electrode pair (103-10) to form the fourth stage discharge module; Similarly, the junctions of adjacent discharge electrode pairs are all connected to the high-potential end of the first discharge capacitor (102-1) via a high-voltage relay resistor. Specifically, one end of the fourth high-voltage relay resistor (104-4) is connected to the junction of the (N+3)th discharge electrode pair (103-(N+3)) and the (N+4)th discharge electrode pair (103-(N+4)), and the other end is connected to the high-potential end of the first discharge capacitor (102-1); one end of the (N+1)th high-voltage relay resistor (104-(N+1)) is connected to the junction of the (N+3)th discharge electrode pair (103-(N+3)) and the (N+4)th discharge electrode pair (103-(N+4)). The N+4 discharge electrode pair (103-(N+4)) and the N+5 discharge electrode pair (103-(N+5)) are connected at their junctions, and the other end is connected to the high potential end of the first discharge capacitor (102-1); one end of the sixth high-voltage relay resistor (104-(N+2)) is connected to the junction of the N+5 discharge electrode pair (103-(N+5)) and the (N+6) discharge electrode pair (103-(N+6)), and the other end is connected to the high potential end of the first discharge capacitor (102-1); and so on; The high potential terminals of the first, second, ..., Nth suppression discharge diodes (101-1, 101-2, ..., 101-N) are all connected to the positive terminal of the power supply; the low potential terminals and the negative terminal of the power supply of the N+1, N+2, ..., 2Nth suppression discharge diodes (101-(N+1), 101-(N+2), ..., 101-2N) are grounded.

2. The high-efficiency multi-point arc discharge device as described in claim 1, characterized in that, N＝4。 3. The high-efficiency multi-point arc discharge device as described in claim 1, characterized in that, The power supply (105) is a high-voltage pulse input source, and the voltage amplitude range of the pulse source output is 2 to 10 kV; the frequency is 0.01 to 10 kHz.

4. The high-efficiency multi-point arc discharge device as described in claim 1, characterized in that, The withstand voltage of the discharge suppression diode (101-N) is related to the amplitude U of the high voltage pulse input to the power supply (105) and the number of Marx circuit stages m; the withstand voltage of the discharge suppression diode (101-N) should not be less than m*U; The withstand voltage of the discharge capacitor (102-N) should not be less than the amplitude U of the high voltage pulse input to the power supply (105), and the capacitance value range is 0.1~100nF; The withstand voltage of the high-voltage relay resistor (104-N) is the same as that of the discharge suppression diode (101-N), and the resistance value is 500~10KΩ; The electrode gap of the discharge electrode pair (103-N) is related to the discharge environment and the input high voltage (104), ranging from 0.5 to 5 mm. Taking advantage of the characteristic of the Marx circuit that the voltage increases step by step, the increase in gap is more determined by the discharge environment for each additional Marx discharge unit.

5. The high-efficiency multi-point arc discharge device as described in claim 4, characterized in that, The discharge capacitor (102-N) has a capacitance of 10nF; The resistance of the high-voltage relay resistor (104-N) is 1kΩ; The electrode gap of the discharge electrode pair (103-N) is 1 mm; the discharge gap increases by 50% for each additional Marx discharge unit.

6. The high-efficiency multi-point arc discharge device as described in any one of claims 1 to 5, characterized in that, The multi-point pulse spark discharge operation process of this device is as follows: For the multi-point arc discharge device of the 4-stage improved Marx circuit, when a high-voltage pulse is input, the discharge capacitor (102-N) is in the charging stage, and the voltage across its terminals continuously increases. Therefore, the voltage across the discharge module also increases simultaneously. Since the first-stage discharge module has only one discharge electrode pair (103-1) and the electrode spacing is minimal, the first-stage discharge module reaches the breakdown condition earliest, causing the air between the first discharge electrode pair (103-1) to break down, and the air changes from an insulator to a conductor. At this time, the low potential terminal of the first discharge capacitor (102-1) in the first-stage boost unit and the second discharge capacitor in the second-stage boost unit... The high-potential end of capacitor (102-2) is connected through a plasma channel formed by discharge. Because the impedance of the plasma channel is very small, the high-potential end of the second discharge capacitor (102-2) will have the same potential as the low-potential end of the first discharge capacitor (102-1). At this time, since the diode cannot conduct in reverse, neither the first discharge capacitor (102-1) nor the second discharge capacitor (102-2) can release energy, and the potential difference across the capacitors still exists. Therefore, the low-potential end of the second discharge capacitor (102-2) will decrease synchronously. The high-potential end of the third discharge capacitor (102-3) in the third-stage boost unit... Since the voltage at the potential terminal remains constant, the voltage across the second-stage discharge module will increase synchronously. Because the air gaps between the second discharge electrode pair (103-2) and the third discharge electrode pair (103-3) are not broken down and are in a high-resistance state (impedance much greater than the first high-voltage relay resistor (104-1)), the voltage across the second-stage discharge module will be applied to the second discharge electrode pair (103-2), causing the air gaps in the second discharge electrode pair (103-2) to break down and conduct. When the second discharge electrode pair (103-2) breaks down, its impedance changes from being much higher than the first high-voltage relay resistor (104-1) to being much lower than the first high-voltage relay resistor (104-1). The pressure resistor (104-1) is pressed; at this time, the voltage across the second-stage discharge module will be applied to the third discharge electrode pair (103-3), breaking it down and making it conductive; and so on, the fourth to tenth discharge electrode pairs (103-4, 103-5, 103-6, 103-7, 103-8, 103-9, 103-10) will break down and become conductive; when all electrode pairs are conductive, all capacitors will change from parallel charging to series discharging, thereby injecting energy and generating plasma excitation; when the pulse high voltage input is cut off, the discharge ends, waiting for the next pulse to trigger a new round of discharge, thereby generating pulsed multi-point discharge.

Images