TW202224298A - Double spark gap element high voltage pulse circuit capable of reducing the risk of downtime by cutting the task in half, temperature in half and element impact in half - Google Patents

Abstract

Disclosed is a double spark gap element high voltage pulse circuit, which is a structure to use a voltage doubler on the circuit to cooperate with a double spark gap element, thereby mutually generating high voltage positive and negative pulses, so as to ease the load for a single spark gap discharge element existing in prior art; moreover, the disclosed is able to reduce the risk of downtime by cutting the task in half, temperature in half and element impact in half; therefore, the disclosed is able to facilitate the reliability of pulse circuit.

Description

Dual spark gap element high voltage pulse circuit

The invention belongs to the technical field of a spark gap, especially a high-voltage pulse circuit with double spark gap elements.

Press, spark gap [Spark Gap, common symbol SG in circuits] is composed of electrodes composed of two conductors, with a gap between them, and the gap can contain free gas, such as air. When the potential difference between the two conductors is higher than the collapse voltage of the gas in the gap, the gas will dissociate at this time, and an electric spark will occur between the two conductors, so that the resistance is greatly reduced. Since the current occurs before the path between the free gases is interrupted, there is also a minimum holding current (Holding Current) below which the current may be interrupted. Heating expansion may also cause current interruptions.

However, there are different methods for the application and design of existing spark gaps, such as "Spark Gap Device, Wireless Device and Electrostatic Discharge Protection Method" in Chinese Patent No. 200910717, and "Triggering Device and Triggering Method for Spark Gap Switch" in Chinese Patent No. 201631853 ” and other previous patent cases. Taking Patent No. 200910717 as an example, it uses a conductor (circuit board wiring) method to form a tip discharge to guide (discharge) the electrostatic charge to the ground terminal. The electrostatic charge is not used by the circuit, and the circuit of the aforementioned patent is used. , Due to the use of a single spark gap discharge element in the process of power transmission, excessive transmission power and the number of power transmission or repetition rate (Repetition rate) is too frequent, it will lead to the phenomenon of interruption and shutdown of the element.

In other words, the design of spark gap components in existing circuits is not perfect, resulting in circuit devices using spark gap components (such as spark gap transmitters, electrostatic generators, X-ray machines, spark plugs, or other protective devices against transient high-voltage currents) ] The spark gap element stops working or fails due to interruption, so how to solve the aforementioned problem becomes an urgent problem to be solved by the present invention.

The reason is that the inventor of the present invention has concentrated on the research and application of the theory in view of the above-mentioned problems faced by the existing ones, adhering to the design, development and implementation experience of the related industry for many years, and improving the existing structure. The high-voltage pulse circuit of the double spark gap element can overcome the trouble and inconvenience caused by the middle section of the spark gap element in the prior circuit device.

The main purpose of the present invention is to provide a high-voltage pulse circuit with dual spark gap components, which can generate high-voltage positive and negative pulses alternately, so as to relieve the load of the spark gap components, effectively reduce the risk of shutdown, and further improve the reliability of the high-voltage pulse circuit.

Another object of the present invention is to provide a high-voltage pulse circuit using double spark gap elements, which can generate high-voltage pulse waves for use in the circuit.

The reason is that, in order to achieve the aforementioned purpose, the present invention provides a high-voltage pulse circuit with dual spark gap elements. The input end of the circuit adopts a full-bridge conversion circuit structure, which includes a DC power supply Vi and four active switches M1-M4. A high boost ratio transformer Tf is connected between the terminal and the output end, and a set of voltage doubling circuits are connected to the secondary side of the high boost ratio transformer Tf, and the voltage doubling circuit includes two high-voltage diodes D1 and D2 , two high-voltage capacitors C1 and C2, and a low-frequency switch S1 and S2 are respectively arranged between each of the high-voltage diodes D1 and D2 and the opposite high-voltage capacitors C1 and C2;

The high-voltage diode D1, the low-frequency switch S1 and the high-voltage capacitor C1 of the voltage doubling circuit are connected with a first spark gap discharge element SG1 and the primary side of a transformer Tp1 to form a high-voltage positive pulse circuit;

The high voltage diode D2, the low frequency switch S2 and the high voltage capacitor C2 of the voltage doubling circuit are connected with a second spark air gap discharge element SG2 and the primary side of a transformer Tp2 to form a high voltage negative pulse circuit, and through the high voltage positive The transformer Tp1 of the pulse circuit is connected in series with the secondary side of the transformer Tp2 of the high voltage negative pulse circuit.

Therefore, through the specific implementation of the above technical means, the present invention can utilize the first and second spark gap discharge elements SG1 and SG2 using the voltage doubling circuit on the circuit to form a structure of double spark gap elements, which can alternately generate high voltage positive , Negative pulse, to relieve the load of the existing single spark gap discharge element, and through the sharing arrangement of half work, half temperature reduction and half component impact reduction, the risk of shutdown can be reduced, and the reliability of the pulse circuit can be further improved. Significantly improve its usability, thereby increasing the added value of the product and improving its economic efficiency.

And the present invention utilizes the following technical means to further achieve the aforementioned purposes and effects; such as:

The transformer Tp2 connected to the second spark air gap discharge element SG2 in the voltage doubling circuit is at the same position as the primary side and the secondary side to generate a positive pulse waveform, which can form an interleaved operation with another group of positive pulses to form An interleaved high-voltage positive pulse circuit.

In order to enable your examiners to further understand the structure, features and other purposes of the present invention, the following are some preferred embodiments of the present invention, which are described in detail below with the accompanying drawings, and at the same time, those who are familiar with the technical field can implement them in detail. .

The present invention is a high-voltage pulse circuit with dual spark gap elements. Among the specific embodiments of the present invention and its components illustrated in the accompanying drawings, all of the front and rear, left and right, top and bottom, upper and lower, and horizontal and vertical The reference is only for convenience of description, and does not limit the present invention, nor restrict its components to any position or spatial direction. The dimensions specified in the drawings and the description can be changed according to the design and requirements of the present invention without departing from the scope of the patent application of the present invention.

The structure of the high-voltage pulse circuit of the dual spark gap element of the present invention is as disclosed in FIG. 1 , the input end of the circuit adopts a full-bridge conversion circuit structure, which includes a DC power supply Vi and four active switches M1-M4, and the input end A high step-up ratio transformer Tf is connected with the output terminal. And the secondary side of the high boost ratio transformer Tf is connected with a set of voltage doubling circuits (20), the voltage doubling circuit (20) includes two high-voltage diodes D1 and D2, two high-voltage capacitors C1 and C2, and A low-frequency switch S1 and S2 are respectively arranged between the high-voltage diodes D1 and D2 and the opposite high-voltage capacitors C1 and C2;

In addition, the high voltage diode D1, the low frequency switch S1 and the high voltage capacitor C1 in the voltage multiplier circuit (20) are connected with a first spark gap discharge element SG1 and the primary side of a transformer Tp1 to form a high voltage positive pulse circuit (30 ), for the high-voltage positive pulse fired by the first spark gap discharge element SG1, and then boosted again through the secondary side of the transformer Tp1 in series with the transformer Tp2 to achieve the effect of two-stage high boosting;

In addition, the high voltage diode D2, the low frequency switch S2 and the high voltage capacitor C2 in the voltage doubling circuit (20) are connected with a second spark air gap discharge element SG2 and the primary side of a transformer Tp2, thereby forming a high voltage negative pulse circuit ( 40), also through the transformer Tp1 of the high-voltage positive pulse circuit (30) in series with the secondary side of the transformer Tp2 of the high-voltage negative pulse circuit (40) to boost the voltage again to achieve the effect of two-stage high boosting;

Furthermore, as shown in FIG. 2 , when the transformer Tp2 connected to the second spark air gap discharge element SG2 in the voltage multiplier circuit (20) is located at the same primary side and the secondary side, a positive pulse can be generated. The waveform can be interleaved with another group of positive pulses to form an interleaved high-voltage positive pulse circuit.

Thereby, a high-voltage pulse circuit with dual spark gap elements that can disperse work and impact and reduce the risk of shutdown is formed.

However, during the actual simulation test of the high-voltage pulse circuit of the dual spark gap element of the present invention, as shown in Figures 1 and 2, due to the high step-up ratio of the circuit, the secondary side of the transformer Tf is connected to a set of voltage doubling circuits (20), and The voltage doubling circuit (20) includes a high voltage positive pulse circuit (30) with a first spark gap discharge element SG1 and a high voltage negative pulse circuit (40) with a second spark gap discharge element SG2. The high-voltage positive pulse fired by a spark gap discharge element SG1 is then boosted again through the transformer Tp1 in series with the secondary side of the transformer Tp2 to achieve the effect of two-stage high voltage boosting, and is also connected in series through the transformer Tp1 of the high-voltage positive pulse circuit (30). The secondary side of the transformer Tp2 of the high-voltage negative pulse circuit (40) is boosted again, thereby achieving the effect of two-stage high voltage boosting, so that the high-voltage positive pulse circuit (30) and the high-voltage negative pulse circuit (40) form an interleaved action, The operating frequency of the first spark gap discharge element SG1 and the second spark gap discharge element SG2 on the circuit is reduced to half, which effectively reduces the phenomenon of stopping work caused by continuous firing overheating.

Thus, according to the operation timing diagram of the high-voltage pulse circuit of the dual spark gap device in FIG. 3 , when the driving signals Vgs2 and Vgs3 control the active switches M2 and M3 respectively; and the signals Vgs1 and Vgs4 control the active switches M1 and M4 respectively. In this way, when the active switches M2 and M3 act, the secondary side high-voltage capacitor C2 starts to accumulate energy, until the capacitor voltage Vc2 is greater than the breakdown voltage of the second spark air gap discharge element SG2, the energy in the capacitor is transferred to the load through the transformers Tp1 and Tp2. RL, generate high voltage negative pulse. Similarly, when the first spark gap discharge element SG1 generates a high-voltage positive pulse, when the signals of the driving signals Vgs1 and Vgs4 are staggered with the time of the signals Vgs1 and Vgs3, the high-voltage positive pulse circuit (30) and the high-voltage negative pulse circuit The first and second spark gap discharge elements SG1 and SG2 of (40) work alternately and transmit power to the load RL.

When the waveform is actually measured, the first spark gap discharge element SG1 and the second spark gap discharge element SG2 of the 800 V specification, as well as the transformer Tp1 of the high-voltage positive pulse circuit (30) and the transformer of the high-voltage negative pulse circuit (40) The turns ratio of Tp2 is 1:2, and the waveform is measured. As shown in Figure 4, it is the positive pulse waveform measured at the output end, the vertical axis is 1.2 kV per grid, the horizontal axis is 50 ns, and the maximum pulse value is about 3.36 kV. Under the same conditions, as shown in Figure 5, the negative pulse waveform can be measured, and the maximum value of the pulse is about -3.36 kV.

Through the foregoing design and description, the high-voltage pulse circuit of dual spark gap elements of the present invention utilizes the first spark gap discharge element SG1 and the high-voltage negative pulse circuit of the high-voltage positive pulse circuit (30) using the voltage multiplier circuit (20) on the circuit. The second spark gap discharge element SG2 of (40) forms a structure of double spark gap elements to alternately generate high-voltage positive and negative pulses to relieve the load of the existing single spark gap discharge element. The sharing arrangement of half reduction and component impact reduction can reduce the risk of shutdown and further improve the reliability of the pulse circuit. At the same time, in the proposed circuit, since the voltage multiplier circuit (20) is matched with the double spark gap discharge elements SG1, SG1 and the double output transformers Tp1, Tp2 of the high-voltage positive pulse circuit (30) and the high-voltage negative pulse circuit (40), the Under the condition that the original structure remains unchanged, the circuit can adjust the polarities of the dual transformers Tp1 and Tp2 at the output end, and can also generate interleaved high-voltage positive pulse output waveforms, and by using the adjustment control strategy, the effect of superimposing pulses can be generated to generate high-voltage Pulse waves, which are used in circuits, greatly improve their usability.

From this, it can be understood that the present invention is an excellent creation, in addition to effectively solving the problems faced by the prior art, it also greatly improves the efficacy, and there is no identical or similar product creation or public use in the same technical field. , and at the same time has the enhancement of efficacy, so the present invention has met the requirements of "novelty" and "progressiveness" of the invention patent, and the application for the invention patent is filed in accordance with the law.

20: Voltage Doubler Circuit 30: High Voltage Positive Pulse Circuit 40: High Voltage Negative Pulse Circuit V _i : DC Power Sources M ₁ to M ₄ : Active Switches T _f : High Step-Up Ratio Transformers D ₁ , D ₂ : High Voltage Diodes C ₁ , C ₂ : high voltage capacitors S ₁ , S ₂ : low frequency switch S _G1 : first spark gap discharge element S _G2 : second spark gap discharge element T _p1 , T _p1 : transformer

FIG. 1 is a schematic diagram of the structure of a high-voltage positive and negative pulse circuit according to a preferred embodiment of the present invention.

FIG. 2 is a schematic diagram of the structure of an interleaved high-voltage positive pulse circuit according to another preferred embodiment of the present invention.

FIG. 3 is a timing chart of the operation of the present invention during driving.

Figure 4 is a schematic diagram of the positive pulse waveform measured at the output end of the 800 V spark air gap discharge element according to the present invention.

Figure 5 is a schematic diagram of the negative pulse waveform measured at the output end of the 800 V spark air gap discharge element according to the present invention.

20: Voltage doubler circuit

30: High voltage positive pulse circuit

40: High voltage negative pulse circuit

V _i : DC power supply

M ₁ ~M ₄ : Active switch

T _f : High step-up ratio transformer

D ₁ , D ₂ : high voltage diodes

C ₁ , C ₂ : High Voltage Capacitors

S1 , S2 _{: low} frequency switch

S _G1 : The first spark gap discharge element

S _G2 : Second spark air gap discharge element

T _p1 , T _p1 : Transformer

Claims (2)

A high-voltage pulse circuit with dual spark gap elements, the input end of the circuit adopts a full-bridge conversion circuit structure, which includes a DC power supply Vi and four active switches M1-M4, and a high step-up ratio transformer is connected between the input end and the output end Tf, and a set of voltage doubling circuits are connected to the secondary side of the high boost ratio transformer Tf. The voltage doubling circuit includes two high-voltage diodes D1 and D2, two high-voltage capacitors C1 and C2, and two high-voltage capacitors C1 and C2. A low frequency switch S1 and S2 are respectively arranged between the high voltage diodes D1 and D2 and the opposite high voltage capacitors C1 and C2; The high-voltage diode D1, the low-frequency switch S1 and the high-voltage capacitor C1 of the voltage doubling circuit are connected with a first spark gap discharge element SG1 and the primary side of a transformer Tp1 to form a high-voltage positive pulse circuit; The high voltage diode D2, the low frequency switch S2 and the high voltage capacitor C2 of the voltage doubling circuit are connected with a second spark air gap discharge element SG2 and the primary side of a transformer Tp2 to form a high voltage negative pulse circuit, and through the high voltage positive The transformer Tp1 of the pulse circuit is connected in series with the secondary side of the transformer Tp2 of the high voltage negative pulse circuit. The high-voltage pulse circuit with dual spark gap elements as claimed in claim 1, wherein the transformer Tp2 connected to the second spark gap discharge element SG2 in the voltage doubling circuit is located at the same primary side and the secondary side, resulting in a positive The pulse waveform can be interleaved with another group of positive pulses to form an interleaved high-voltage positive pulse circuit.

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