A high-voltage power supply device for a plasma nanometer powder preparation equipment

Abstract

The utility model relates to a kind of plasma nanometer powder preparation equipment high-voltage power supply device, comprising: high-voltage power supply body, adaptive control module and detection module;The input side and the output side of the detection module and high-voltage power supply body are respectively electrically connected, for collecting input electric parameter and output high-voltage parameter;The adaptive control module is respectively electrically connected with detection module and high-voltage power supply body, for the output voltage and current of high-voltage power supply body are adaptively adjusted according to the parameter collected by detection module;The utility model has the advantages that: it has the advantages of simple structure and reliable, and integrated detection, control, protection function in one, without complex external components, failure rate is reduced by more than 30%, and through protection module, prolongs the service life of equipment.

Description

Technical Field

[0001] This utility model relates to the field of plasma nanopowder extraction equipment technology, specifically to a high-voltage power supply device for plasma nanopowder extraction equipment with adaptive control function, and more particularly to a high-voltage power supply structure with input adaptive adjustment and output dynamic control functions. Background Technology

[0002] Plasma nanopowder extraction equipment generates plasma using a high-voltage power supply. The high temperature and energy of the plasma are used to dissociate and condense gaseous or solid raw materials into nanopowders, and nanospheres can also be formed. The high-voltage power supply is the core component of the equipment; its output stability directly affects the plasma state, which in turn determines key indicators such as the particle size distribution and purity of the nanopowder.

[0003] In existing technologies, the high-voltage power supply of plasma nanopowder extraction equipment has the following drawbacks:

[0004] 1. The input wiring is complex and requires matching with a specific type of input power supply (such as a stable three-phase 380V power supply). If the input voltage fluctuates significantly (such as ±10% or more), it will cause unstable high-voltage output. Additional voltage stabilizing equipment or manual adjustment of the wiring adapter is required, which is cumbersome.

[0005] 2. The control method is mostly based on fixed parameter output, which cannot adjust the high voltage output in real time according to the actual state of the plasma (such as changes in plasma arc intensity and raw material feed rate), which easily leads to problems such as uneven powder particle size and agglomeration;

[0006] 3. The lack of targeted protection mechanisms makes it easy for high-voltage power supplies to be damaged when there are abnormal inputs or overloads in the output, affecting the continuous operation of the equipment.

[0007] Therefore, there is an urgent need for a high-voltage power supply device that can adapt to changes in input power supply, adjust output parameters in real time, and has a simple structure, in order to solve the above problems. Utility Model Content

[0008] In view of the above problems, the purpose of this utility model is to provide a high-voltage power supply device for plasma nanopowder extraction equipment, which can realize adaptive adjustment of the input three-phase power supply, simplify the wiring process, and dynamically adjust the output according to the plasma state, thereby improving the quality of nanopowder and the stability of the equipment, and fundamentally overcoming the shortcomings of the above-mentioned prior art.

[0009] This utility model provides a high-voltage power supply device for plasma nanopowder extraction equipment, comprising: a high-voltage power supply body, an adaptive control module, and a detection module; the detection module is electrically connected to the input side and the output side of the high-voltage power supply body respectively, and is used to collect input electrical parameters and output high-voltage parameters; the adaptive control module is electrically connected to the detection module and the high-voltage power supply body respectively, and is used to adaptively adjust the output voltage and current of the high-voltage power supply body according to the parameters collected by the detection module.

[0010] As a preferred embodiment of the present invention, the detection module includes an input voltage sensor, an input current sensor, an output high voltage sensor, and an output current sensor; the input voltage sensor and the input current sensor are connected in series between the input terminal of the high voltage power supply body and the external power supply, and the output high voltage sensor and the output current sensor are connected in series between the output terminal of the high voltage power supply body and the plasma generator.

[0011] As a preferred embodiment of the present invention, the adaptive control module includes a microcontroller and a drive unit module; the microcontroller is electrically connected to the detection module and is used to receive the electrical signal output by the detection module and generate control commands; the drive unit module is electrically connected to the microcontroller and the high-voltage power supply body respectively, and is used to convert the control commands into drive signals and control the voltage regulation module of the high-voltage power supply body to operate.

[0012] As a preferred embodiment of the present invention, the voltage regulation module of the high-voltage power supply body includes a thyristor voltage regulation module, and the drive unit module is electrically connected to the voltage regulation module and controls its conduction angle or switching frequency.

[0013] As a preferred embodiment of the present invention, it further includes a human-computer interaction module, which is electrically connected to the adaptive control module and is used to input control parameters and display the operating status of the device.

[0014] As a preferred embodiment of the present invention, the human-computer interaction module includes a touch screen and a button unit, wherein the touch screen is used to display parameters and the button unit is used to input set values.

[0015] As a preferred embodiment of the present invention, a protection module is also included. The protection module is electrically connected to the detection module and the adaptive control module. When the parameters collected by the detection module exceed a preset threshold, the protection module sends a protection signal to the adaptive control module to control the high-voltage power supply body to stop outputting.

[0016] As a preferred embodiment of the present invention, the protection module includes an overvoltage protection unit module, an overcurrent protection unit module, and an overheat protection unit module, which respectively detect input overvoltage, output overcurrent, and the temperature exceeding the limit of the high-voltage power supply body.

[0017] As a preferred embodiment of the present invention, the microcontroller includes 32 pins, of which six pins P22-P27 drive six transistors Q3-Q8 respectively, generating a drive signal that is output from the J2 port and connected to the trigger pin of the thyristor module of the voltage regulation module; the microcontroller has a built-in PID algorithm module, which receives the signal from the detection module and calculates the PWM control signal, which is then amplified by the drive unit module to drive the thyristor of the voltage regulation module, adjusting the trigger angle to change the output voltage.

[0018] As a preferred embodiment of the present invention, the secondary side pins of the three input current sensors TA1, TA2, and TA3 are connected in a star configuration to the Ia, Ib, and Ic terminals of the microcomputer control board; the output high voltage sensor collects the high voltage output signal through a voltage divider and connects it to the +VF and COM2 terminals of the microcomputer control board; the output current sensor is connected to the control circuit of the high voltage power supply body through a wire to realize the overcurrent protection of the device, and the collected signal is converted into a digital signal by an AD converter and then transmitted to the adaptive control module.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. This utility model realizes adaptive input regulation. The input voltage is collected in real time by the detection module, and the adaptive control module automatically adjusts the voltage regulation component so that the target high voltage can still be stably output when the input voltage fluctuates within the range of 220-440V. No additional voltage stabilization equipment is required, which simplifies the 380V input wiring.

[0021] 2. This utility model realizes dynamic output adjustment. By combining the output high voltage parameters and plasma state feedback (which can be indirectly reflected by the output current), the output is adjusted in real time to keep the plasma state stable and reduce the particle size deviation of nanoparticles (tested, the standard deviation of particle size distribution can be reduced from ±15nm in the prior art to ±5nm).

[0022] 3. This utility model has the advantages of simple and reliable structure, and integrates detection, control and protection functions into one, without the need for complex external components, reducing the failure rate by more than 30%, and extending the service life of the equipment through the protection module. Attached Figure Description

[0023] Figure 1 This is a structural block diagram of this embodiment.

[0024] Figure 2 This is a block diagram of the adaptive system in this embodiment.

[0025] Figure 3 This is a PCB diagram of the adaptive control circuit board in this embodiment.

[0026] Figure 4 This is a schematic diagram of the trigger circuit in this embodiment. Detailed Implementation

[0027] See Figure 1-4As shown in the figure, this embodiment provides a high-voltage power supply device for plasma nanopowder production equipment, including: a high-voltage power supply body 1, a detection module 2, an adaptive control module 3, a human-machine interaction module 4, and a protection module 5; the detection module 2 is electrically connected to the input and output sides of the high-voltage power supply body 1, respectively, and is used to collect input electrical parameters (voltage, current) and output high-voltage parameters (voltage, current); the adaptive control module 3 is electrically connected to the detection module 2 and the high-voltage power supply body 1, respectively, and is used to adaptively adjust the output voltage and current of the high-voltage power supply body 1 according to the parameters collected by the detection module 2. The high-voltage power supply body 1 is used to convert the input three-phase low-voltage AC power into the high-voltage DC power of 0-10KV required for plasma production. The detection module 2 includes an input voltage sensor (Hall voltage sensor), an input current sensor 22 (Hall current sensor), an output high-voltage sensor 23 (voltage divider type high-voltage sensor), and an output current sensor 24 (Rogowski coil); the input voltage sensor and the input current sensor 22 are connected in series between the input terminal of the high-voltage power supply body 1 and the external power supply, and the output high-voltage sensor 23 and the output current sensor 24 are connected in series between the output terminal of the high-voltage power supply body 1 and the plasma generator. The adaptive control module 3 includes a microcontroller 31 (STM32H743 microprocessor) and a drive unit module (IGBT drive module). The microcontroller 31 is electrically connected to the detection module 2 and is used to receive the electrical signals output by the detection module 2 and generate control commands. The drive unit module is electrically connected to both the microcontroller 31 and the high-voltage power supply body 1, and is used to convert the control commands into drive signals and control the operation of the voltage regulation module 11 of the high-voltage power supply body 1. The voltage regulation module 11 includes a thyristor voltage regulation module 11. The drive unit module is electrically connected to the voltage regulation module 11 and controls its conduction angle or switching frequency. In other words, the voltage regulation command is converted into a pulse signal to control the switching frequency or conduction angle of the voltage regulation component, achieving continuous adjustment of the output high voltage. The human-machine interface module 4 (7-inch touchscreen) is electrically connected to the adaptive control module 3 and is used to input control parameters and display the device's operating status. The human-machine interface module 4 includes a touch screen and a button unit. The touch screen is used to display parameters, such as real-time input voltage, output high voltage, plasma status, etc. The button unit is used to input set values, such as target high voltage value (e.g., 20kV), maximum output current (e.g., 3A), etc. The protection module 5 is electrically connected to the detection module 2 and the adaptive control module 3. When the parameters collected by the detection module 2 exceed the preset threshold, the protection module 5 sends a protection signal to the adaptive control module 3 to control the high-voltage power supply body 1 to stop outputting.When the input voltage is detected to be >440V or <220V, the output current is detected to be >5A, or the temperature of the high-voltage power supply body 1 is detected to be >85℃, the microcontroller 31 triggers a protection command, drives the high-voltage power supply body 1 to stop output, and alarms are triggered through the human-machine interaction module 4. The protection module 5 includes an overvoltage protection unit module, an overcurrent protection unit module, and an overheat protection unit module, which respectively detect input overvoltage, output overcurrent, and the temperature of the high-voltage power supply body 1 exceeding the limit.

[0028] Furthermore, in this embodiment, the high-voltage power supply body 1 adopts a thyristor-regulated high-voltage power supply with a 3-phase AC 0-380V input and a DC 0-10kV output. It is equipped with a voltage regulation module 11 (a three-phase voltage regulation circuit composed of 3 thyristor modules).

[0029] Furthermore, in this embodiment, the microcontroller 31 (model STC8H1K28-32) is a macrochip with 32 pins. Among them, six pins, P22-P27, drive six transistors, Q3-Q8, respectively, generating a drive signal that is output from the J2 port and connected to the trigger pin of the thyristor module of the voltage regulation module 11. The microcontroller 31 has a built-in PID algorithm module (PID regulation algorithm). After receiving the signal from the detection module 2, it calculates the PWM control signal, which is amplified by the drive unit module and drives the thyristor of the voltage regulation module 11 to adjust the trigger angle to change the output voltage.

[0030] Furthermore, in this embodiment, the input current sensor 22 (model LMZ(J)-0.5), manufactured by Andeli Group Co., Ltd., has its three secondary side pins TA1, TA2, and TA3 connected in a star configuration to the Ia, Ib, and Ic terminals of the microcomputer control board; the output high-voltage sensor 23 collects the high-voltage output signal through a voltage divider and connects it to the +VF and COM2 terminals of the microcomputer control board; the output current sensor 24 is connected to the control circuit of the high-voltage power supply body 1 via a wire to realize the overcurrent protection of the equipment, and the collected signal is converted into a digital signal by an AD converter and then transmitted to the adaptive control module 3.

[0031] Furthermore, in this embodiment, the human-computer interaction module 4 adopts a 7-inch touch screen (model TPC7062Ti), which is connected to the microcontroller 31 via an RS485 bus. It can set the target high voltage (e.g., 6kV), maximum current (e.g., 9A), and display parameters such as real-time input voltage (e.g., 380V) and output current (e.g., 2.5A).

[0032] Furthermore, the protection module 5 in this embodiment includes a voltage comparator (model LM393) and a temperature sensor (model DS18B20). The temperature sensor is attached to the thyristor heat sink of the high-voltage power supply body 1. When the input voltage is detected to be >440V or <220V, the output current is >5A, or the temperature is >85℃, the voltage comparator outputs a high level to the microcontroller 31. The microcontroller 31 immediately sends a shutdown signal to the drive unit module to stop the voltage regulation module 11 from working. At the same time, the touch screen displays alarm information such as "input overvoltage" and "overload".

[0033] Working principle:

[0034] 1. After the device is started, the input power is connected to the input terminal of the high-voltage power supply body 1, and the detection module 2 begins to collect the input voltage (e.g., 300V) and transmit it to the microcontroller 31;

[0035] 2. The microcontroller 31 calculates the initial PWM duty cycle based on the set target high voltage (10kV) and input voltage value using a PID algorithm, drives the voltage regulation component to output 0-10kV high voltage, and generates plasma after ignition;

[0036] 3. When the input voltage fluctuates to 350V, the input voltage sensor detects the change, and the microcontroller 31 automatically adjusts the PWM duty cycle (from 50% to 45%) to maintain the output high voltage at a stable 0-10kV.

[0037] 4. If the feed rate of the raw material increases, causing the output current to rise from 5A to 9A (reflecting an increase in plasma load), the output current sensor 24 will transmit the signal to the microcontroller 31. The microcontroller 31 will fine-tune the output high voltage to 10kV so that the plasma energy matches the raw material requirements.

[0038] 5. When the input voltage suddenly rises to 410V, the protection module 5 triggers an alarm, the high-voltage power supply body 1 stops outputting, and after the input returns to normal, it is reset and restarted via the touch screen.

[0039] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A high voltage power supply device for a plasma nanometer powder production apparatus, comprising: The high-voltage power supply body is characterized by further comprising: an adaptive control module and a detection module; the detection module is electrically connected to the input side and the output side of the high-voltage power supply body respectively, and is used to collect input electrical parameters and output high-voltage parameters; the adaptive control module is electrically connected to the detection module and the high-voltage power supply body respectively, and is used to adaptively adjust the output voltage and current of the high-voltage power supply body according to the parameters collected by the detection module.

2. The high-voltage power supply device for a plasma nanopowder extraction apparatus according to claim 1, characterized in that, The detection module includes an input voltage sensor, an input current sensor, an output high voltage sensor, and an output current sensor; the input voltage sensor and the input current sensor are connected in series between the input terminal of the high voltage power supply body and the external power supply, and the output high voltage sensor and the output current sensor are connected in series between the output terminal of the high voltage power supply body and the plasma generator.

3. The high voltage power supply device of the equipment for preparing plasma nano-powder according to claim 1, characterized in that, The adaptive control module includes a microcontroller and a drive unit module; the microcontroller is electrically connected to the detection module and is used to receive the electrical signals output by the detection module and generate control commands; the drive unit module is electrically connected to the microcontroller and the high-voltage power supply body respectively, and is used to convert the control commands into drive signals and control the voltage regulation module of the high-voltage power supply body to operate.

4. The high-voltage power supply device for a plasma nanopowder extraction apparatus according to claim 3, characterized in that, The voltage regulation module of the high-voltage power supply body includes a thyristor voltage regulation module, and the drive unit module is electrically connected to the voltage regulation module and controls its conduction angle or switching frequency.

5. The high-voltage power supply device for a plasma nanopowder extraction apparatus according to claim 1, characterized in that, It also includes a human-computer interaction module, which is electrically connected to the adaptive control module and is used to input control parameters and display the operating status of the device.

6. The high-voltage power supply device for a plasma nanopowder extraction apparatus according to claim 5, characterized in that, The human-computer interaction module includes a touch screen and a button unit. The touch screen is used to display parameters, and the button unit is used to input set values.

7. The high voltage power supply device of the equipment for preparing plasma nano-powder according to claim 1, characterized in that, It also includes a protection module, which is electrically connected to the detection module and the adaptive control module. When the parameters collected by the detection module exceed a preset threshold, the protection module sends a protection signal to the adaptive control module to control the high-voltage power supply to stop outputting.

8. The high voltage power supply device of the equipment for preparing plasma nanometer powder according to claim 7, characterized in that, The protection module includes an overvoltage protection unit module, an overcurrent protection unit module, and an overheat protection unit module, which respectively detect input overvoltage, output overcurrent, and the temperature exceeding the limit of the high-voltage power supply body.

9. The high voltage power supply device of the equipment for preparing plasma nano-powder according to claim 3, characterized in that, The microcontroller includes 32 pins, of which six pins P22-P27 drive six transistors Q3-Q8 respectively, generating a drive signal that is output from the J2 port and connected to the trigger pin of the thyristor module of the voltage regulation module. The microcontroller has a built-in PID algorithm module, which receives the signal from the detection module and calculates the PWM control signal. After being amplified by the drive unit module, the PWM control signal drives the thyristor of the voltage regulation module to adjust the trigger angle and change the output voltage.

10. The high-voltage power supply device for a plasma nanopowder extraction apparatus according to claim 2, characterized in that, The secondary side pins of the three input current sensors TA1, TA2, and TA3 are connected in a star configuration to the Ia, Ib, and Ic terminals of the microcomputer control board. The output high-voltage sensor collects the high-voltage output signal through a voltage divider and connects it to the +VF and COM2 terminals of the microcomputer control board. The output current sensor is connected to the control circuit of the high-voltage power supply body through a wire to realize the overcurrent protection of the equipment. The collected signal is converted into a digital signal by an AD converter and then transmitted to the adaptive control module.

Images