Plasma power supply

Abstract

The invention discloses a plasma power supply which comprises a booster circuit module used for converting input alternating current or direct current low voltage into positive and negative bipolar high voltage output, the nominal value of the high voltage output is 10 kV, and the allowable deviation range is + / -5%; the dynamic protection module comprises an overvoltage protection unit, an overcurrent protection unit and a temperature protection unit, and when the temperature exceeds 80 DEG C, the forced heat dissipation device is started; the frequency adjusting module is energy-saving and efficient based on PWM signal control, comprehensive disinfection of a space can be achieved through low-power input (smaller than or equal to 500 W), safety and reliability are achieved, and long-term stable operation of equipment is guaranteed through a triple protection mechanism (overvoltage, overcurrent and temperature); the response time is less than or equal to 1ms, which is far lower than the average 5ms level of the industry, and is flexibly adapted: the frequency and power parameters are adjustable, and the system is adapted to various scenes such as medical, industrial and household scenes; internet of Things access is supported, remote monitoring and intelligent scheduling are achieved, cost is low, and the maintenance cost is reduced through modular design.

Description

Technical Field

[0001] The present invention belongs to the field of power electronics technology, and specifically relates to an efficient and adjustable power supply system for providing driving power for a plasma generator. The power supply significantly improves the stability and efficiency of plasma generation by optimizing circuit design and protection mechanism, and is suitable for scenarios such as medical disinfection, air purification, and industrial waste gas treatment. Background Art

[0002] Plasma technology has been widely used in the field of air purification in recent years due to its high efficiency in sterilization and decomposition of pollutants. However, the plasma generators in the prior art have the following defects: Low power efficiency: Traditional power sources require high power input to achieve large-scale disinfection, high energy consumption and high cost;

[0003] 1. Fixed parameters: Parameters such as output voltage and frequency cannot be adjusted, making it difficult to adapt to different environmental requirements;

[0004] 2. Insufficient safety: Lack of accurate overvoltage and overcurrent protection mechanisms can easily lead to equipment damage or safety hazards;

[0005] 3. Large size: The circuit design is complex and difficult to deploy in a miniaturized manner.

[0006] In response to the above problems, the present invention proposes a new plasma power supply, which integrates a high-frequency boost circuit, a dynamic protection module and an intelligent control unit to achieve large-scale and efficient disinfection under low power input, while supporting real-time parameter adjustment and multiple safety protections. Summary of the invention

[0007] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a plasma power supply.

[0008] One of the purposes of the present invention is achieved by the following technical scheme: a plasma power supply, comprising a boost circuit module, for converting an input AC or DC low voltage into a positive and negative bipolar high voltage output, wherein the nominal value of the high voltage output is 10 kV, and the allowable deviation range is ±5%; a dynamic protection module, comprising an overvoltage protection unit, an overcurrent protection unit and a temperature protection unit, wherein: the overvoltage protection unit sets a threshold range of 10 kV ± 10%, and when it is detected that the output voltage exceeds the threshold, a fast circuit breaker mechanism is triggered and the output is cut off; the overcurrent protection unit monitors the output current in real time through a Hall sensor, and when the current exceeds 700 mA, the current limiting protection is activated, and the output power is automatically reduced to a safe range; the temperature protection unit monitors the circuit temperature through a thermistor, and when the temperature exceeds 80° C., a forced heat dissipation device is activated; a frequency adjustment module, based on PWM signal control, supports continuous adjustment of the operating frequency within the range of 12 kHz to 22 kHz, and can receive remote control instructions through an external interface; an intelligent control unit, integrated with a microcontroller (MCU), is used to collect voltage, current, frequency and temperature data in real time, and implement parameter setting, mode switching and fault alarm through a human-computer interaction interface.

[0009] Furthermore, the boost circuit module includes a high-frequency transformer, a full-bridge rectifier circuit and a soft switching circuit; the magnetic core of the high-frequency transformer is made of ferrite material, the turns ratio of the primary winding to the secondary winding is 1:50, and the maximum conversion efficiency is ≥95%; the full-bridge rectifier circuit is composed of four fast recovery diodes, and the reverse recovery time is ≤50ns; the soft switching circuit adopts zero voltage switching (ZVS) technology to reduce switching losses and suppress electromagnetic interference.

[0010] Furthermore, the overvoltage protection unit includes a voltage divider sampling circuit, a high-speed comparator and a solid-state relay; the voltage divider ratio of the voltage divider sampling circuit is 1000:1, and the sampling accuracy is ±0.5%; the response time of the high-speed comparator is ≤100μs, and the output signal drives the solid-state relay to cut off the main circuit.

[0011] Furthermore, the overcurrent protection unit also includes an adaptive current limiting algorithm; when the current exceeds 700mA, the MCU dynamically adjusts the PWM duty cycle based on a preset algorithm to linearly reduce the output current to below 600mA; the algorithm includes current integral control and slope compensation to prevent oscillation.

[0012] Furthermore, the frequency regulation module supports multi-mode operation: fixed frequency mode: the user manually sets any frequency value within 12kHz-22kHz; adaptive frequency mode: the frequency is automatically adjusted according to changes in load impedance to maintain optimal plasma generation efficiency.

[0013] Furthermore, the intelligent control unit further includes a communication module that supports at least one of the following protocols: an RS485 interface for distributed control in industrial scenarios; a Wi-Fi or Bluetooth module for remote monitoring by mobile terminals; and a CAN bus for integration of a vehicle-mounted plasma purification system.

[0014] Furthermore, the human-computer interaction interface is a touch screen, and the displayed content includes real-time parameters (voltage, current, frequency, temperature), historical data curves and fault codes; the fault alarm includes sound and light alarm and cloud push notification.

[0015] Furthermore, the input voltage range of the power supply is 100V-240V AC / DC, which is compatible with global power grid standards; the output end adopts high-voltage ceramic insulation terminals with a withstand voltage level of ≥15kV and a protection level of IP67.

[0016] Furthermore, the plasma power supply is suitable for driving multiple types of loads, including but not limited to: a flat-plate plasma generator for air disinfection; a tubular plasma reactor for industrial waste gas treatment; and an array plasma module for large space purification.

[0017] Furthermore, in the initialization phase: the input voltage and load status are detected, and the default working parameters are automatically matched; in the operation phase: the output data is collected in real time. If overvoltage, overcurrent or overtemperature is detected, the corresponding protection mechanism is triggered and the fault log is recorded; in the adjustment phase: according to user instructions or environmental sensor feedback, the frequency and power are dynamically adjusted to optimize energy consumption and purification efficiency.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Energy saving and high efficiency: small power input (≤500W) can achieve comprehensive disinfection of the space;

[0020] 2. Safe and reliable: Triple protection mechanism (overvoltage, overcurrent, temperature) ensures long-term stable operation of the equipment; response time ≤1ms, far lower than the industry average of 5ms.

[0021] 3. Flexible adaptation: The frequency and power parameters are adjustable, suitable for various scenarios such as medical, industrial, and household; supports Internet of Things access to achieve remote monitoring and intelligent scheduling.

[0022] 4. Low cost: Modular design reduces maintenance costs.

[0023] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 4 is a block diagram of the plasma power supply system of this embodiment. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0026] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] Embodiment 1:

[0029] like Figure 1As shown, the plasma power supply of this embodiment includes a boost circuit module for converting the input AC or DC low voltage into a positive and negative bipolar high voltage output, the nominal value of the high voltage output is 10kV, and the allowable deviation range is ±5%; a dynamic protection module, including an overvoltage protection unit, an overcurrent protection unit and a temperature protection unit, wherein: the overvoltage protection unit sets a threshold range of 10kV±10%, and when it is detected that the output voltage exceeds the threshold, the fast circuit breaker mechanism is triggered and the output is cut off; the overcurrent protection unit monitors the output current in real time through a Hall sensor, and when the current exceeds 700mA, the current limiting protection is activated, and the output power is automatically reduced to a safe range; the temperature protection unit monitors the circuit temperature through a thermistor, and when the temperature exceeds 80°C, the forced heat dissipation device is activated; the frequency adjustment module, based on PWM signal control, supports an operating frequency of 12kHz to 22kH The voltage-to-voltage converter is continuously adjustable within the range of 1:1 and can receive remote control commands through an external interface. The intelligent control unit integrates a microcontroller (MCU) for real-time acquisition of voltage, current, frequency and temperature data, and implements parameter setting, mode switching and fault alarm through a human-machine interactive interface. The boost circuit module includes a high-frequency transformer, a full-bridge rectifier circuit and a soft-switching circuit. The magnetic core of the high-frequency transformer is made of ferrite material, the turns ratio of the primary winding to the secondary winding is 1:50, and the maximum conversion efficiency is ≥95%. The full-bridge rectifier circuit is composed of four fast recovery diodes, and the reverse recovery time is ≤50ns. The soft-switching circuit adopts zero voltage switching (ZVS) technology to reduce switching losses and suppress electromagnetic interference. The overvoltage protection unit includes a voltage-dividing sampling circuit, a high-speed comparator and a solid-state relay. The voltage-dividing sampling circuit has a voltage-dividing ratio of 1000:1 and a sampling accuracy of ±0.5%; the response time of the high-speed comparator is ≤100μs, and the output signal drives the solid-state relay to cut off the main circuit. The overcurrent protection unit also includes an adaptive current limiting algorithm; when the current exceeds 700mA, the MCU dynamically adjusts the PWM duty cycle based on the preset algorithm to linearly reduce the output current to below 600mA; the algorithm includes current integral control and slope compensation to prevent oscillation, and the frequency adjustment module supports multi-mode operation: fixed frequency mode: the user manually sets any frequency value within 12kHz-22kHz; adaptive frequency mode: automatically adjusts the frequency according to changes in load impedance to maintain optimal plasma generation efficiency, and the intelligent control unit further includes a communication module that supports at least the following protocols in this embodiment: RS485 interface, for distributed control of industrial scenarios; Wi-Fi or Bluetooth module, for remote monitoring of mobile terminals; CAN bus, for integration of vehicle-mounted plasma purification systems, and the human-computer interaction interface is touch Touch screen, display content includes real-time parameters (voltage, current, frequency, temperature), historical data curves and fault codes; fault alarms include sound and light alarms and cloud push notifications, the input voltage range of the power supply is 100V-240VAC / DC, compatible with global power grid standards; the output end uses high-voltage ceramic insulation terminals, the withstand voltage level is ≥15kV, and the protection level is IP67. The plasma power supply is suitable for driving multiple types of loads, including but not limited to: flat-plate plasma generators for air disinfection; tubular plasma reactors for industrial waste gas treatment; array plasma modules for large space purification, initialization stage: detect input voltage and load status, and automatically match default working parameters; operation stage: real-time collection of output data, if overvoltage, overcurrent or overtemperature is detected, the corresponding protection mechanism is triggered and the fault log is recorded; adjustment stage: according to user instructions or environmental sensor feedback, dynamically adjust the frequency and power to optimize energy consumption and purification efficiency. .

[0030] Embodiment 2:

[0031] Take the medical disinfection scenario as an example:

[0032] Connect the plasma power supply to the 220V AC power grid; set the working mode to "fast disinfection" through the touch screen, and the frequency is automatically adjusted to 20kHz; the power supply outputs 10kV high-voltage drive generator, and completes 100m within 30 minutes 3 Disinfection without blind spots in the space; the system monitors the current in real time. If the load is abnormal (such as short circuit), the current limiting protection is immediately triggered and an alarm is sounded.

[0033] Working principle: High voltage generation, the input voltage is converted into positive and negative high voltage by the boost circuit, driving the plasma generator to ionize the oxygen in the air; ion generation: the high voltage electric field dissociates the oxygen molecules into positive ions (O 2 + ) and negative ions (O 2- ), of which negative ions account for 60%; disinfection and purification: active ions release energy through charge neutralization, destroy the microbial structure, and decompose pollutants into CO 2 and H 2 O; Dynamic adjustment: The control unit automatically adjusts the frequency and power according to environmental requirements to balance efficiency and energy consumption.

[0034] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A plasma power supply, comprising a boost circuit module, for converting an input AC or DC low voltage into a positive and negative bipolar high voltage output, characterized in that: The nominal value of the high-voltage output is 10kV, and the allowable deviation range is ±5%; the dynamic protection module includes an overvoltage protection unit, an overcurrent protection unit and a temperature protection unit, wherein: the overvoltage protection unit sets a threshold range of 10kV±10%, and when it is detected that the output voltage exceeds the threshold, the fast circuit breaker mechanism is triggered and the output is cut off; the overcurrent protection unit monitors the output current in real time through a Hall sensor, starts the current limiting protection when the current exceeds 700mA, and automatically reduces the output power to a safe range; the temperature protection unit monitors the circuit temperature through a thermistor, and starts the forced heat dissipation device when the temperature exceeds 80°C; the frequency adjustment module, based on PWM signal control, supports continuous adjustment of the operating frequency in the range of 12kHz to 22kHz, and can receive remote control instructions through an external interface; the intelligent control unit, integrated with a microcontroller (MCU), is used to collect voltage, current, frequency and temperature data in real time, and realize parameter setting, mode switching and fault alarm through a human-computer interaction interface.

2. A plasma power supply according to claim 1, characterized in that: The boost circuit module includes a high-frequency transformer, a full-bridge rectifier circuit and a soft switching circuit; the magnetic core of the high-frequency transformer is made of ferrite material, the turns ratio of the primary winding to the secondary winding is 1:50, and the maximum conversion efficiency is ≥95%; the full-bridge rectifier circuit is composed of four fast recovery diodes, and the reverse recovery time is ≤50ns; the soft switching circuit adopts zero voltage switching (ZVS) technology to reduce switching losses and suppress electromagnetic interference.

3. A plasma power supply according to claim 1, characterized in that: The overvoltage protection unit includes a voltage division sampling circuit, a high-speed comparator and a solid-state relay; the voltage division ratio of the voltage division sampling circuit is 1000:1, and the sampling accuracy is ±0.5%; the response time of the high-speed comparator is ≤100μs, and the output signal drives the solid-state relay to cut off the main circuit.

4. A plasma power supply according to claim 1, characterized in that: The overcurrent protection unit also includes an adaptive current limiting algorithm; when the current exceeds 700mA, the MCU dynamically adjusts the PWM duty cycle based on a preset algorithm to linearly reduce the output current to below 600mA; the algorithm includes current integral control and slope compensation to prevent oscillation.

5. A plasma power supply according to claim 1, characterized in that: The frequency adjustment module supports multi-mode operation: fixed frequency mode: the user manually sets any frequency value within 12kHz-22kHz; Adaptive Frequency Mode: Automatically adjusts frequency based on load impedance changes to maintain optimal plasma generation efficiency.

6. A plasma power supply according to claim 1, characterized in that: The intelligent control unit further includes a communication module that supports at least one of the following protocols: an RS485 interface for distributed control in industrial scenarios; a Wi-Fi or Bluetooth module for remote monitoring by mobile terminals; and a CAN bus for integration of a vehicle-mounted plasma purification system.

7. A plasma power supply according to claim 1, characterized in that: The human-computer interaction interface is a touch screen, and the displayed content includes real-time parameters (voltage, current, frequency, temperature), historical data curves and fault codes; the fault alarm includes sound and light alarm and cloud push notification.

8. A plasma power supply according to claim 1, characterized in that: The input voltage range of the power supply is 100V-240V AC / DC, which is compatible with global power grid standards; the output end adopts high-voltage ceramic insulation terminals with a withstand voltage level of ≥15kV and a protection level of IP67.

9. A plasma power supply according to any one of claims 1 to 8, characterized in that: The plasma power supply is suitable for driving multiple types of loads, including but not limited to: a flat-plate plasma generator for air disinfection; a tubular plasma reactor for industrial waste gas treatment; and an array plasma module for large space purification.

10. A plasma power supply according to claim 1, characterized in that: Initialization phase: detect input voltage and load status, and automatically match default working parameters; Operation phase: collect output data in real time. If overvoltage, overcurrent or overtemperature is detected, the corresponding protection mechanism is triggered and the fault log is recorded; Adjustment phase: according to user instructions or environmental sensor feedback, dynamically adjust frequency and power to optimize energy consumption and purification efficiency.

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