High-voltage power supply flashover protection device

Abstract

The utility model provides a high-voltage power supply flashover protection device, which comprises a voltage and current acquisition module, a master control module, a driving module, a power unit, a flashover energy absorption circuit and a high-voltage power supply output circuit, and is characterized in that the voltage and current acquisition module is used for acquiring voltage and current of a high-voltage power supply in real time and transmitting the voltage and current to the master control module; and the main control module is used for determining whether a flashover phenomenon occurs in the high-voltage power supply according to the voltage and the current, if the flashover phenomenon occurs, controlling the driving module to start the flashover energy absorption circuit and output the flashover energy after absorbing the flashover energy, and if the flashover phenomenon does not occur, controlling the driving module to start the power unit and generate a high-voltage output through the power unit. According to the utility model, the flashover energy absorption of the high-voltage power supply can be realized, the flashover phenomenon of the high-voltage power supply is protected, and the use safety of the high-voltage power supply is ensured.

Description

Technical Field

[0001] The utility model relates to the field of high-voltage power supply protection, and more specifically, to a high-voltage power supply flashover protection device. Background Art

[0002] With the continuous development of industry and technology, high-voltage power supplies have found widespread application in numerous fields, including power transmission, medical equipment, and scientific research. However, flashover is a common occurrence during the operation of high-voltage power supplies. Flashover refers to the instantaneous discharge that occurs on or within an insulating medium under the influence of a high-voltage electric field. Once a flashover occurs, it not only affects the normal output of the power supply but can also damage connected equipment and even cause failure of the entire system.

[0003] Currently, traditional high-voltage power supply control methods often suffer from long recovery times, unstable recovery processes, and the susceptibility to secondary flashovers when responding to flashovers. This not only reduces power supply efficiency and increases maintenance costs, but also has a serious impact on applications requiring extremely high power stability. Summary of the Invention

[0004] The utility model aims to solve the technical problems existing in the prior art and provides a high-voltage power supply flashover protection device to solve the problem that the high-voltage power supply may damage the connected equipment due to flashover, thereby causing failure of the entire system.

[0005] The utility model provides a high-voltage power supply flashover protection device, comprising a voltage and current acquisition module, a main control module, a drive module, a power unit, a flashover energy absorption circuit and a high-voltage power supply output circuit, wherein the input end of the voltage and current acquisition module is connected to the output end of the high-voltage power supply output circuit, the output end of the voltage and current acquisition module is connected to the input end of the main control module, the output end of the main control module is connected to the input end of the drive module, the output end of the drive module is respectively connected to the input end of the power unit and the input end of the flashover energy absorption circuit, and the output end of the power unit and the output end of the flashover energy absorption circuit are connected to the input end of the high-voltage power supply output circuit;

[0006] The voltage and current acquisition module is used to collect the voltage and current of the high-voltage power supply in real time and transmit them to the main control module;

[0007] The main control module is used to determine whether a flashover phenomenon occurs in the high-voltage power supply based on the voltage and current. If a flashover phenomenon occurs, the main control module is used to control the driving module to turn on the flashover energy absorption circuit to absorb the flashover energy and output high voltage through the high-voltage power supply output circuit; if no flashover phenomenon occurs, the main control module is used to control the driving module to turn on the power unit to generate a high voltage through the power unit and output the high voltage through the high-voltage power supply output circuit.

[0008] On the basis of the above technical solution, the present invention can also make the following improvements.

[0009] Optionally, the driving module includes a power unit driving circuit and a flashover energy absorption circuit, the input end of the power unit driving circuit is connected to the output end of the main control module, the output end of the power unit driving circuit is connected to the input end of the power unit, the input end of the flashover energy absorption circuit is connected to the main control module, and the output end of the flashover energy absorption circuit is connected to the flashover energy absorption circuit.

[0010] Optionally, the voltage and current acquisition module includes a voltage acquisition circuit and a current acquisition circuit, the current acquisition circuit includes sixteen resistors, four capacitors, an isolation chip U1 and two clamping diodes, resistors R10, R11, R12, R13, R14, R15 and R16 are connected in parallel to form a resistor array, the resistor array is connected between pin A and ground, pin A is connected to the anode of the clamping diode D2, the cathode of the clamping diode D1 and pin 2 of the isolation chip U1 respectively through resistors R1, R2 and R3, the cathode of the clamping diode D2 is connected to the first end of the resistor R8, the anode of the clamping diode D1 is connected to the first end of the resistor R8, the second end of the resistor R8 is connected to pin A through resistors R7, R6 and R9 in sequence, and pin A is connected to the high-voltage power supply output circuit;

[0011] Pin 1 of the isolation chip U1 is connected to a 5V power supply and to ground through a capacitor C1. Pin 2 of the isolation chip U1 is connected to pin 3 of the isolation chip U1 and the first end of the resistor R8 through capacitors C3 and C3, respectively. Pin 4 and pin 5 of the isolation chip U1 are grounded. Pin 6 of the isolation chip U1 is connected to pin A- through resistor R5. Pin 7 of the isolation chip U1 is connected to pin A+ through resistor R4. Pin 8 of the isolation chip U1 is connected to a 5V power supply and to ground through capacitor C2. Pin A- and pin A+ are connected to the main control module.

[0012] The voltage acquisition circuit has four resistors and a gas discharge tube G1, pin V+ is connected to pin A through resistor R17, resistor R18 and resistor R19 in sequence, pin V- is grounded through resistor R20, pin 1 of the gas discharge tube G1 is grounded, and pin 2 of the gas discharge tube G1 is connected to pin V, wherein pin V+ and pin V- are connected to the main control module, and pin V is connected to the high-voltage power supply output circuit.

[0013] Optionally, the flashover energy absorption circuit includes thirteen resistors, six capacitors, one inductor and two gas discharge tubes. The drive circuit is connected to pin 1 of the gas discharge tube D5 through pin VOUTA, and pin 2 of the gas discharge tube D5 is connected to the high-voltage power supply output circuit through resistor R30, resistor R31 and resistor R32 in sequence. Resistor R33 and inductor L1 are connected in parallel between pin 1 and pin 2 of the gas discharge tube G5. Pin 2 of the gas discharge tube G5 is also connected to pin 1 of the gas discharge tube G6, and pin 2 of the gas discharge tube G6 is connected to the high-voltage power supply output circuit. The capacitors C4, C5, and C6 are connected to ground in sequence. A resistor R21 is connected in parallel at both ends of the capacitor C4. A resistor R22 is connected in parallel at both ends of the capacitor C5. A resistor R23 is connected in parallel at both ends of the capacitor C6. One end of the resistor R32 close to the high-voltage power supply output circuit is connected to ground in sequence through a resistor R29, a resistor R28, a resistor R27, a capacitor C7, a capacitor C8, and a capacitor C9. A resistor R24 is connected in parallel at both ends of the capacitor C7. A resistor R25 is connected in parallel at both ends of the capacitor C8. A resistor R26 is connected in parallel at both ends of the capacitor C9.

[0014] The utility model provides a high-voltage power supply flashover protection device. The voltage and current acquisition module collects the voltage and current of the high-voltage power supply in real time and transmits them to the main control module. The main control module determines whether the high-voltage power supply has flashover based on the voltage and current. If flashover occurs, the main control module controls the drive module to activate the flashover energy absorption circuit, absorb the flashover energy and output it. If flashover does not occur, the main control module controls the drive module to activate the power unit, which generates a high-voltage output. The utility model can absorb the flashover energy of the high-voltage power supply, protect the high-voltage power supply from flashover, and ensure the safe use of the high-voltage power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a block diagram of a high-voltage power supply flashover protection device provided by the utility model;

[0016] Figure 2-1 Schematic diagram of current sampling circuit;

[0017] Figure 2-2 Schematic diagram of voltage sampling circuit;

[0018] Figure 3 Schematic diagram of the flashover energy absorption circuit. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In addition, the technical features in the various embodiments or single embodiments provided by the present invention can be arbitrarily combined with each other to form a feasible technical solution. This combination is not restricted by the order of steps and / or structural composition mode, but must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0020] Figure 1 The utility model provides a high-voltage power supply flashover protection device, which includes a voltage and current acquisition module, a main control module, a drive module, a power unit, a flashover energy absorption circuit and a high-voltage power supply output circuit.

[0021] The input end of the voltage and current acquisition module is connected to the output end of the high-voltage power supply output circuit, the output end of the voltage and current acquisition module is connected to the input end of the main control module, the output end of the main control module is connected to the input end of the driving module, the output end of the driving module is respectively connected to the input end of the power unit and the input end of the flashover energy absorption circuit, and the output end of the power unit and the output end of the flashover energy absorption circuit are connected to the input end of the high-voltage power supply output circuit.

[0022] The voltage and current acquisition module is used to collect the voltage and current of the high-voltage power supply in real time and transmit them to the main control module;

[0023] The main control module is used to determine whether a flashover phenomenon occurs in the high-voltage power supply based on the voltage and current. If a flashover phenomenon occurs, the main control module is used to control the driving module to turn on the flashover energy absorption circuit to absorb the flashover energy and output high voltage through the high-voltage power supply output circuit; if no flashover phenomenon occurs, the main control module is used to control the driving module to turn on the power unit to generate a high voltage through the power unit and output the high voltage through the high-voltage power supply output circuit.

[0024] Among them, the model of the main control module is EG4A20BG256.

[0025] The voltage and current acquisition module collects the real-time voltage and current of the high-voltage power supply in real time and sends the collected real-time voltage and current to the main control module. The main control module determines whether the high-voltage power supply has flashed based on the real-time voltage and current. The method used by the main control module to determine whether a flashover has occurred is very simple and is also a common method. When a flashover occurs in a high-voltage power supply, the output voltage and current of the high-voltage power supply will change significantly. Typically, a flashover causes a momentary drop in voltage and a momentary increase in current. Therefore, the main control module can determine whether a flashover has occurred by monitoring the changes in voltage and current in real time.

[0026] If the high-voltage power supply flashes, the main control module drives the flashover energy absorption circuit to absorb the flashover energy and then output high voltage, thus protecting the high-voltage power supply from flashover. If the high-voltage power supply does not flash over, the power unit is driven to output high voltage normally.

[0027] The voltage and current detection module includes a voltage acquisition circuit and a current acquisition circuit. The current acquisition circuit is used to acquire the real-time current of the high-voltage power supply and send the acquired current to the main control module; the voltage acquisition circuit is used to acquire the real-time voltage of the high-voltage power supply and send the acquired voltage to the main control module. Figure 2-1 The schematic diagram of the current acquisition circuit is shown. The current acquisition circuit includes sixteen resistors, four capacitors, an isolation chip U1 and two clamping diodes. Resistors R10, R11, R12, R13, R14, R15 and R16 are connected in parallel to form a resistor array. The resistor array is connected between pin A and ground. Pin A is connected to the anode of clamping diode D2, the cathode of clamping diode D1 and pin 2 of isolation chip U1 through resistors R1, R2 and R3 respectively. The cathode of clamping diode D2 is connected to the first end of resistor R8, the anode of clamping diode D1 is connected to the first end of resistor R8, and the second end of resistor R8 is connected to pin A through resistors R7, R6 and R9 in sequence. Pin A is connected to the high-voltage power supply output circuit.

[0028] Pin 1 of the isolation chip U1 is connected to a 5V power supply and to ground through capacitor C1. Pin 2 of the isolation chip U1 is connected to pin 3 of the isolation chip U1 and the first end of resistor R8 through capacitor C3 and capacitor C3 respectively. Pin 4 and pin 5 of the isolation chip U1 are grounded. Pin 6 of the isolation chip U1 is connected to pin A- through resistor R5. Pin 7 of the isolation chip U1 is connected to pin A+ through resistor R4. Pin 8 of the isolation chip U1 is connected to a 5V power supply and to ground through capacitor C2. Pin A- and pin A+ are connected to the main control module.

[0029] Among them, the model of the isolation chip U1 is AMC1301D.

[0030] Figure 2-2 The schematic diagram of the voltage acquisition circuit is shown. The voltage acquisition circuit has four resistors and a gas discharge tube G1. Pin V+ is connected to pin A through resistors R17, R18, and R19 in sequence. Pin V- is grounded through resistor R20. Pin 1 of the gas discharge tube G1 is grounded, and pin 2 of the gas discharge tube G1 is connected to pin V. Pins V+ and V- are connected to the main control module, and pin V is connected to the high-voltage power supply output circuit.

[0031] Among them, the models of the gas discharge tube D1, the gas discharge tube D5 and the gas discharge tube D6 are 2RL075L-5 / B.

[0032] Figure 3 The schematic diagram of the flashover energy absorption circuit is shown. The flashover energy absorption circuit includes thirteen resistors, six capacitors, one inductor and two gas discharge tubes. The driving circuit is connected to pin 1 of the gas discharge tube D5 through pin VOUTA. Pin 2 of the gas discharge tube D5 is connected to the high-voltage power supply output circuit through resistors R30, R31 and R32 in sequence. Resistor R33 and inductor L1 are connected in parallel between pins 1 and 2 of the gas discharge tube G5. Pin 2 of the gas discharge tube G5 is also connected to pin 1 of the gas discharge tube G6. Pin 2 of 6 is grounded in sequence through capacitor C4, capacitor C5 and capacitor C6, a resistor R21 is connected in parallel at both ends of the capacitor C4, a resistor R22 is connected in parallel at both ends of the capacitor C5, a resistor R23 is connected in parallel at both ends of the capacitor C6, and the end of the resistor R32 close to the high-voltage power supply output circuit is grounded in sequence through resistor R29, resistor R28, resistor R27, capacitor C7, capacitor C8 and capacitor C9, a resistor R24 is connected in parallel at both ends of the capacitor C7, a resistor R25 is connected in parallel at both ends of the capacitor C8, and a resistor R26 is connected in parallel at both ends of the capacitor C9.

[0033] The present invention provides a high-voltage power supply flashover protection device. A voltage and current acquisition module collects the voltage and current of the high-voltage power supply in real time and transmits them to a main control module. The main control module determines whether a flashover has occurred in the high-voltage power supply based on the voltage and current. If a flashover has occurred, the main control module controls the drive module to activate a flashover energy absorption circuit, absorbing the flashover energy and then outputting it. If no flashover has occurred, the main control module controls the drive module to activate a power unit, which generates a high-voltage output. This device can absorb the flashover energy of the high-voltage power supply, protect against flashovers, and ensure safe use of the high-voltage power supply.

[0034] It should be noted that, in the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0035] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0036] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A high voltage power supply flashover protection device, characterized in that: The system comprises a voltage and current acquisition module, a main control module, a drive module, a power unit, a flashover energy absorption circuit and a high-voltage power supply output circuit, wherein the input end of the voltage and current acquisition module is connected to the output end of the high-voltage power supply output circuit, the output end of the voltage and current acquisition module is connected to the input end of the main control module, the output end of the main control module is connected to the input end of the drive module, the output end of the drive module is respectively connected to the input end of the power unit and the input end of the flashover energy absorption circuit, and the output end of the power unit and the output end of the flashover energy absorption circuit are connected to the input end of the high-voltage power supply output circuit; The voltage and current acquisition module is used to collect the voltage and current of the high-voltage power supply in real time and transmit them to the main control module; The main control module is used to determine whether a flashover phenomenon occurs in the high-voltage power supply based on the voltage and current. If a flashover phenomenon occurs, the main control module is used to control the driving module to turn on the flashover energy absorption circuit to absorb the flashover energy and output high voltage through the high-voltage power supply output circuit; if no flashover phenomenon occurs, the main control module is used to control the driving module to turn on the power unit to generate a high voltage through the power unit and output the high voltage through the high-voltage power supply output circuit.

2. The high voltage power supply flashover protection device according to claim 1, characterized in that: The driving module includes a power unit driving circuit and a flashover energy absorption driving circuit, the input end of the power unit driving circuit is connected to the output end of the main control module, the output end of the power unit driving circuit is connected to the input end of the power unit, the input end of the flashover energy absorption driving circuit is connected to the main control module, and the output end of the flashover energy absorption circuit is connected to the flashover energy absorption circuit.

3. The high voltage power supply flashover protection device according to claim 1, characterized in that: The voltage and current acquisition module includes a voltage acquisition circuit and a current acquisition circuit. The current acquisition circuit includes sixteen resistors, four capacitors, an isolation chip U1, and two clamping diodes. Resistors R10, R11, R12, R13, R14, R15, and R16 are connected in parallel to form a resistor array. The resistor array is connected between pin A and ground. Pin A is connected to the anode of the clamping diode D2, the cathode of the clamping diode D1, and pin 2 of the isolation chip U1 through resistors R1, R2, and R3, respectively. The cathode of the clamping diode D2 is connected to the first end of the resistor R8, the anode of the clamping diode D1 is connected to the first end of the resistor R8, and the second end of the resistor R8 is connected to pin A through resistors R7, R6, and R9, respectively. Pin A is connected to the high-voltage power supply output circuit. Pin 1 of the isolation chip U1 is connected to a 5V power supply and to ground through a capacitor C1. Pin 2 of the isolation chip U1 is connected to pin 3 of the isolation chip U1 and the first end of the resistor R8 through capacitors C3 and C3, respectively. Pin 4 and pin 5 of the isolation chip U1 are grounded. Pin 6 of the isolation chip U1 is connected to pin A- through resistor R5. Pin 7 of the isolation chip U1 is connected to pin A+ through resistor R4. Pin 8 of the isolation chip U1 is connected to a 5V power supply and to ground through capacitor C2. Pin A- and pin A+ are connected to the main control module. The voltage acquisition circuit has four resistors and a gas discharge tube G1 (2RL075L-5 / B), pin V+ is connected to pin A through resistor R17, resistor R18 and resistor R19 in sequence, pin V- is grounded through resistor R20, pin 1 of the gas discharge tube G1 is grounded, and pin 2 of the gas discharge tube G1 is connected to pin V, wherein pins V+ and pin V- are connected to the main control module, and pin V is connected to the high-voltage power supply output circuit.

4. The high voltage power supply flashover protection device according to claim 1, characterized in that: The flashover energy absorption circuit includes thirteen resistors, six capacitors, one inductor and two gas discharge tubes. The driving module is connected to pin 1 of the gas discharge tube D5 through pin VOUTA. Pin 2 of the gas discharge tube D5 is connected to the high-voltage power supply output circuit through resistors R30, R31 and R32 in sequence. Resistor R33 and inductor L1 are connected in parallel between pins 1 and 2 of the gas discharge tube G5. Pin 2 of the gas discharge tube G5 is also connected to pin 1 of the gas discharge tube G6. Pin 2 of the gas discharge tube G6 is connected in parallel to the high-voltage power supply output circuit. The first circuit is connected to ground through capacitors C4, C5, and C6, with resistors R21 connected in parallel at both ends of the capacitor C4, resistors R22 connected in parallel at both ends of the capacitor C5, and resistors R23 connected in parallel at both ends of the capacitor C6. The end of the resistor R32 close to the high-voltage power supply output circuit is connected to ground in sequence through resistors R29, R28, R27, capacitors C7, C8, and C9, with resistors R24 connected in parallel at both ends of the capacitor C7, resistors R25 connected in parallel at both ends of the capacitor C8, and resistors R26 connected in parallel at both ends of the capacitor C9.

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