Air glow discharge power supply control method and device, power supply and medium

Abstract

The present application relates to power supply control technical field, disclose air glow discharge power supply control method, device, power supply and medium, the method comprises: monitoring modulation resonant circuit output to air glow discharge load AC signal;Extract the peak voltage and resonance parameter of AC signal;Determine whether the peak voltage is greater than the preset peak voltage threshold, the preset peak voltage threshold is used to represent the maximum peak voltage when arc discharge occurs;When the peak voltage is not greater than the preset peak voltage threshold, the action timing of controlled switch is adjusted based on the resonance parameter. By monitoring the peak voltage of the AC signal output by the power supply to the air glow discharge load, it is determined whether arc discharge occurs. When arc discharge occurs, the action timing of the controlled switch is changed, which causes the modulation resonant circuit to generate additional energy loss, thereby reducing the energy used for discharge to achieve arc extinction, so that the load recovers from the arc state to the normal discharge state.

Description

Technical Field

[0001] This invention relates to the field of power supply control technology, specifically to a method, device, power supply, and medium for controlling air glow discharge power supplies. Background Technology

[0002] Air glow discharge is a phenomenon in which a high-frequency (typically several kHz or higher) alternating high-voltage current is applied between two electrodes. Utilizing the characteristic that the change in air polarity lags behind the electrodes, the air breaks down, resulting in a high-frequency discharge. The normal state of air glow discharge is a short, uniform, high-frequency arc. However, under abnormal conditions, such as changes in air conductivity, a continuous, long, and thick arc can easily occur, known as arcing. During arcing, because most of the energy is absorbed by the long, thick arc, there is insufficient energy to maintain other short, uniform, high-frequency arcs, eventually causing the short, uniform, high-frequency arcs to disappear, and the air glow discharge completely transforms into arcing. Therefore, maintaining a stable air glow discharge is a crucial problem that needs to be solved. Summary of the Invention

[0003] In view of this, the present invention provides a method, device, power supply and medium for controlling an air glow discharge power supply, in order to solve the problem that arcing discharge easily occurs in air glow discharge power supplies in related technologies, affecting the stability of air glow discharge.

[0004] In a first aspect, the present invention provides a method for controlling an air glow discharge power supply, the power supply comprising: a DC power supply and a modulation resonant circuit connected to the DC power supply, wherein a controlled switch is provided in the modulation resonant circuit, the controlled switch being used to adjust the resonant frequency of the modulation resonant circuit, and the method comprising:

[0005] Monitor the AC signal output from the modulation resonant circuit to the air glow discharge load;

[0006] Extract the peak voltage and resonance parameters of the AC signal;

[0007] Determine whether the peak voltage is greater than a preset peak voltage threshold, wherein the preset peak voltage threshold is used to characterize the maximum peak voltage when arcing discharge occurs;

[0008] When the peak voltage is not greater than the preset peak voltage threshold, the timing of the controlled switch is adjusted based on the resonance parameters.

[0009] Therefore, the presence of arcing is determined by monitoring the peak voltage of the AC signal output from the power supply to the air glow discharge load. When arcing occurs, the timing of the controlled switch is adjusted using the resonant parameters of the monitored AC signal. By changing the timing of the controlled switch, the modulation resonant circuit generates additional energy loss, thereby reducing the energy used for discharge and the energy transferred to the load to extinguish the arc, allowing the load to return from the arcing state to the normal glow discharge state.

[0010] In one optional implementation, adjusting the timing of the controlled switch based on the resonant parameters includes:

[0011] The timing sequence of the controlled switch is adjusted from the first operating timing sequence corresponding to the resonance parameter to another operating timing sequence, wherein the other operating timing sequence is inconsistent with the first operating timing sequence.

[0012] When the timing of the controlled switch is consistent with the resonant period, current zero point, and voltage zero point in the resonant parameters, the overall loss of the entire modulation resonant circuit is minimized, and the energy transferred to the load is maximized. Therefore, when the load is in normal air glow discharge, the timing of the controlled switch is consistent with the resonant parameters. When arcing occurs, the switching loss of the controlled switch can be increased by adjusting the timing of the controlled switch to be inconsistent with the resonant parameters, thereby reducing the energy transferred to the load. This energy is insufficient to maintain the energy required for arcing, thus achieving the function of arc extinguishing.

[0013] In one alternative implementation, after adjusting the timing of the controlled switch based on the resonance parameters, the method further includes:

[0014] Repeat the step of monitoring the AC signal output from the modulation resonant circuit to the load;

[0015] If the peak voltage is detected to be no greater than the preset peak voltage threshold, the output voltage of the DC power supply is reduced.

[0016] Therefore, if arcing still exists after adjusting the timing of the controlled switch, it means that simply adjusting the timing of the controlled switch is insufficient to extinguish the arc. By reducing the output voltage of the command power supply, the upper limit of the energy output to the load is reduced, so that the energy is insufficient to maintain the energy required for arcing, thereby achieving the function of extinguishing the arc.

[0017] In one optional implementation, if the peak voltage is detected to be greater than the preset peak voltage threshold, the operating timing of the controlled switch is restored to the second operating timing corresponding to the current resonance parameter of the AC signal.

[0018] Therefore, after adjusting the operating timing of the controlled switch, if arcing is not present, it indicates that arc extinguishing has been achieved. In order to improve the efficiency of the air glow discharge power supply, the controlled switch is controlled to return to the optimal operating timing consistent with the resonance parameters, so as to maximize the energy transferred to the load and ensure the stability of the air glow discharge of the load.

[0019] In one alternative implementation, after reducing the output voltage of the DC power supply, the method further includes:

[0020] Repeat the step of monitoring the AC signal output from the modulation resonant circuit to the load;

[0021] If the peak voltage is detected to be greater than the preset peak voltage threshold, the output voltage of the DC power supply will be restored to the normal output voltage.

[0022] If the peak voltage is detected to be no greater than the preset peak voltage threshold, return to the step of reducing the output voltage of the DC power supply until the output voltage of the DC power supply is reduced to the lowest preset voltage threshold, and then issue an alarm and / or control the controlled switch to turn off.

[0023] Therefore, when the DC power supply output voltage is reduced, the AC signal is re-monitored to determine whether arc extinguishing was successful. If arc extinguishing is successful, the normal output voltage of the DC power supply is restored, improving the efficiency of the air glow discharge power supply and maximizing the energy transferred to the load, thus ensuring the stability of the air glow discharge of the load. If arc extinguishing fails, it means that the energy output to the load is still too high. Therefore, the output voltage of the DC power supply can be further reduced to decrease the energy transferred to the load until arc extinguishing is achieved, ensuring the stability of the air glow discharge of the load. If the arcing still exists even after the DC power supply output voltage is reduced to the minimum value, it means that automatic arc extinguishing cannot be achieved. An alarm is triggered, and manual intervention is required. At the same time, the power supply to the glow discharge power supply can be stopped by turning off the controlled switch to prevent the load from being in an arcing state for a long time, which could cause damage to the devices.

[0024] In an optional implementation, before adjusting the timing of the controlled switch's operation based on the resonant period, the method further includes:

[0025] Calculate the voltage difference between the preset peak voltage threshold and the peak voltage;

[0026] Determine whether the voltage difference is less than a preset voltage difference threshold;

[0027] When the voltage difference is less than the preset voltage difference threshold, the timing of the controlled switch is adjusted based on the resonance parameters;

[0028] When the voltage difference is not less than the preset voltage difference threshold, the output voltage of the DC power supply is reduced.

[0029] The severity of the arcing is determined by comparing the voltage difference between the generated arcing voltage and the peak voltage at the load. If the voltage difference is small, the arcing is not severe, and the arc can be extinguished simply by adjusting the timing of the controlled switch, thus avoiding repeated adjustments to the DC power supply output voltage and keeping the load discharge in a relatively stable state. If the voltage difference is large, it means that the arc cannot be extinguished by adjusting the timing of the controlled switch. In this case, the arc is extinguished directly by reducing the DC power supply output voltage to improve the efficiency of arc handling.

[0030] Secondly, the present invention provides an air glow discharge power supply control device, the power supply comprising: a DC power supply and a modulation resonant circuit connected to the DC power supply, wherein a controlled switch is provided in the modulation resonant circuit, the controlled switch being used to adjust the resonant frequency of the modulation resonant circuit, and the device comprising:

[0031] The monitoring module is used to monitor the AC signal output from the modulation resonant circuit to the load;

[0032] The first processing module is used to extract the peak voltage and resonance parameters of the AC signal;

[0033] The second processing module is used to determine whether the peak voltage is greater than a preset peak voltage threshold, wherein the preset peak voltage threshold is used to characterize the maximum peak voltage when arcing discharge occurs.

[0034] The third processing module is used to adjust the timing of the controlled switch based on the resonance parameters when the peak voltage is not greater than the preset peak voltage threshold.

[0035] Thirdly, the present invention provides an air glow discharge power supply, comprising: a DC power supply and a modulation resonant circuit connected to the DC power supply, wherein a controlled switch is provided in the modulation resonant circuit, the controlled switch being used to adjust the resonant frequency of the modulation resonant circuit, and the air glow discharge power supply further comprising:

[0036] The controller includes a memory and a processor, which are communicatively connected. The memory stores computer instructions, and the processor executes the computer instructions to perform the air glow discharge power supply control method of the first aspect or any corresponding embodiment described above.

[0037] In one optional embodiment, the modulation resonant circuit further includes: a modulation and resonant network and a boost module, wherein the input terminal of the modulation and resonant network is connected to the output terminal of the DC power supply through the controlled switch, and the output terminal of the modulation and resonant network is connected to an air glow discharge load through the boost module.

[0038] The air glow discharge power supply further includes a feedback module and a peak detection module. The feedback module is used to collect waveform information of the resonant period, current zero point, and voltage zero point of the high-frequency AC output of the modulation resonant circuit, and send the waveform information to the controller. The peak detection module is used to collect the peak voltage of the AC signal on the discharge electrode of the air glow discharge load, and send the peak voltage to the controller.

[0039] Fourthly, the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to execute the air glow discharge power supply control method of the first aspect or any corresponding embodiment thereof. Attached Figure Description

[0040] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of an air glow discharge power supply according to an embodiment of the present invention;

[0042] Figure 2 This is another structural schematic diagram of an air glow discharge power supply according to an embodiment of the present invention;

[0043] Figure 3 This is a schematic flowchart of an air glow discharge power supply control method according to an embodiment of the present invention;

[0044] Figure 4 This is a schematic flowchart of another air glow discharge power supply control method according to an embodiment of the present invention;

[0045] Figure 5 This is a flowchart illustrating another air glow discharge power supply control method according to an embodiment of the present invention;

[0046] Figure 6 This is a schematic diagram of the specific control process of the air glow discharge power supply according to an embodiment of the present invention;

[0047] Figure 7 This is a structural block diagram of an air glow discharge power supply control device according to an embodiment of the present invention;

[0048] Figure 8 This is a schematic diagram of the hardware structure of the controller in the air glow discharge power supply according to an embodiment of the present invention. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Air glow discharge is a phenomenon in which a high-frequency (typically several kHz or higher) alternating high-voltage current is applied between two electrodes. Utilizing the characteristic that the change in air polarity lags behind the electrodes, the air breaks down, resulting in a high-frequency discharge. The normal state of air glow discharge is a short, uniform, high-frequency arc. However, under abnormal conditions, such as changes in air conductivity, a continuous, long, and thick arc can easily occur, known as arcing. During arcing, because most of the energy is absorbed by the long, thick arc, there is insufficient energy to maintain other short, uniform, high-frequency arcs, eventually causing the short, uniform, high-frequency arcs to disappear, and the air glow discharge completely transforms into arcing. Therefore, maintaining a stable air glow discharge is a crucial problem that needs to be solved.

[0051] The present invention provides a power supply and control method for handling glow discharge arcing. During normal air glow discharge, the arc is a high-frequency, uniform, short, and staggered arc. However, during arcing, a long and thick arc appears, requiring more energy than normal discharge. Because the arc is long and thick, the peak value of the high-voltage, high-frequency AC current on the air glow discharge electrode is generally lowered, allowing for the determination of arcing. If the energy is insufficient to sustain the long and thick arc, it will disappear. In this embodiment, the energy at the load is reduced by adjusting the timing of controlled switches in the modulation resonant circuit to handle arcing. Alternatively, the energy limit at the load can be directly lowered by reducing the DC power supply output voltage, thus achieving timed arcing control and maintaining the stability of the air glow discharge at the load.

[0052] An air glow discharge power supply is provided in this embodiment of the invention, such as... Figure 1As shown, the air glow discharge power supply includes: a DC power supply 101 and a modulation resonant circuit 102 connected to the DC power supply 101. A controlled switch 21 is provided in the modulation resonant circuit 102, which is used to adjust the resonant frequency of the modulation resonant circuit 102. The air glow discharge power supply also includes: a controller 103, which is used to monitor the AC signal output from the modulation resonant circuit 102 to the air glow discharge load 104; extract the peak voltage and resonant parameters of the AC signal; determine whether the peak voltage is greater than a preset peak voltage threshold, which is used to characterize the maximum peak voltage when arcing occurs; and adjust the timing of the controlled switch 21 based on the resonant parameters when the peak voltage is not greater than the preset peak voltage threshold. The specific working principle and process of the controller 103 can be found in the relevant description of the method embodiment below, and will not be repeated here.

[0053] In this embodiment of the invention, the controlled switch 21 is an energy input control switch, and its action sequence is also called the working sequence, which is the time when the switch is turned on and off. In practical applications, the action sequence is periodic, and the controlled switch 21 turns on and off periodically according to the action sequence.

[0054] Therefore, the presence of arcing is determined by monitoring the peak voltage of the AC signal output from the power supply to the air glow discharge load. When arcing occurs, the timing of the controlled switch is adjusted using the resonant parameters of the monitored AC signal. By changing the timing of the controlled switch, the modulation resonant circuit generates additional energy loss, thereby reducing the energy used for discharge and the energy transferred to the load to extinguish the arc, allowing the load to return from the arcing state to the normal glow discharge state.

[0055] For example, such as Figure 2 As shown, the controlled switch 21 is an energy input control switch, the DC power supply 101 is a controllable power supply, and the modulation resonant circuit 102 further includes a modulation and resonant network 22 and a boost module 23. The input terminal of the modulation and resonant network 22 is connected to the output terminal of the DC power supply 101 through the controlled switch 21, and the output terminal of the modulation and resonant network 22 is connected to the air glow discharge load 104 through the boost module 23. The air glow discharge power supply also includes a feedback module 105 and a peak detection module 106. The feedback module 105 is used to collect the waveform information of the resonant period, current zero point, and voltage zero point of the high-frequency AC output of the modulation resonant circuit 102, and send the waveform information to the controller 103. The peak detection module 106 is used to collect the peak voltage of the AC signal on the discharge electrode of the air glow discharge load 104, and send the peak voltage to the controller 103.

[0056] The specific circuit structure and working principle of the modulation and resonant network 22 and the boost module 23 mentioned above are all existing technologies. They can be implemented by referring to the relevant design of air glow discharge power supply in the existing technology, and will not be described in detail here.

[0057] The controller 103 analyzes the waveform information to obtain the resonant period of the AC signal output from the modulation resonant circuit 102 to the air glow discharge load 104, and uses this to determine the optimal operating sequence of the controlled switch. During normal air glow discharge of the air glow discharge load 104, the controller controls the controlled switch to turn on and off according to this optimal operating sequence to reduce power loss, maximize the energy of the air glow discharge load 104, and ensure the stability of the air glow discharge. In addition, the controller 103 receives the peak voltage fed back by the peak detection module 106 and compares it with a preset peak voltage threshold to determine whether arcing has occurred. If arcing occurs, arcing is handled to maintain the stability of the air glow discharge.

[0058] According to an embodiment of the present invention, an embodiment of an air glow discharge power supply control method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0059] This embodiment provides a method for controlling an air glow discharge power supply, which can be used for, for example... Figure 1 The controller 103 of the air glow discharge power supply shown is a control chip, such as an MCU or microcontroller. Figure 3 This is a flowchart of an air glow discharge power supply control method according to an embodiment of the present invention, such as... Figure 3 As shown, the process includes the following steps:

[0060] Step S301: Monitor the AC signal output from the modulation resonant circuit to the air glow discharge load.

[0061] Specifically, after the DC power supply is modulated and boosted by the modulation resonant circuit, a high-voltage, high-frequency AC signal is obtained and applied to the air glow discharge electrode of the load to perform air glow discharge.

[0062] Step S302: Extract the peak voltage and resonance parameters of the AC signal.

[0063] Specifically, the peak voltage is the peak voltage at the point where the voltage amplitude of the aforementioned high-voltage, high-frequency AC signal is at its maximum, and the resonance parameters include: resonance period, current zero point, voltage zero point, etc.

[0064] Step S303: Determine whether the peak voltage is greater than the preset peak voltage threshold.

[0065] The preset peak voltage threshold is used to characterize the maximum peak voltage when arcing occurs. During normal air glow discharge, the arc is a high-frequency, uniform, short, and thin arc, and its discharge is intermittent. However, during arcing in air glow discharge, a long and thick arc appears. Therefore, the energy required for arcing is generally greater than that required for normal discharge. Because the arc is long and thick, the peak value of the high-voltage, high-frequency alternating current on the air glow discharge electrode is generally pulled very low during arcing. Therefore, the presence of arcing can be determined by the peak value of the high-voltage, high-frequency alternating current. This preset peak voltage threshold can be obtained through extensive experimental measurements, and this invention is not limited thereto.

[0066] Step S304: When the peak voltage is not greater than the preset peak voltage threshold, the timing of the controlled switch is adjusted based on the resonance parameters.

[0067] Specifically, during normal air glow discharge, it is necessary to control the timing of the controlled switch's operation. This means the switching period should match the resonant period, and the switching should occur when the voltage or current is zero. In other words, the controlled switch operates at its optimal timing to minimize switching losses, maximize load power supply, and maintain the stability of the air glow discharge. Therefore, based on this characteristic, the timing of the controlled switch can be adjusted according to the resonant parameters. By increasing switching losses, the energy at the load can be reduced, thus achieving arcing control.

[0068] For example, the optimal operating timing described above is derived based on the resonant period, current zero point, and voltage zero point. First, the switching period of the energy input control switch should coincide with the resonant period of the modulation and resonant network. Second, the energy input control switch should switch when the voltage across it is zero or the current flowing through it is zero. The specific switching processes for which switches occur at zero voltage and which at zero current vary depending on the topology and will not be elaborated upon here. There are also various methods for measuring the resonant period, current zero point, and voltage zero point, which will not be discussed further. It should also be noted that the optimal operating timing is dynamic and is affected by factors such as modulation and resonant network parameters, discharge state, and load conditions.

[0069] Therefore, the presence of arcing is determined by monitoring the peak voltage of the AC signal output from the power supply to the air glow discharge load. When arcing occurs, the timing of the controlled switch is adjusted using the resonant parameters of the monitored AC signal. By changing the timing of the controlled switch, the modulation resonant circuit generates additional energy loss, thereby reducing the energy used for discharge and the energy transferred to the load to extinguish the arc, allowing the load to return from the arcing state to the normal glow discharge state.

[0070] This embodiment provides a method for controlling an air glow discharge power supply, which can be used for, for example... Figure 1 The controller 103 of the air glow discharge power supply shown is a control chip, such as an MCU or microcontroller. Figure 4 This is a flowchart of an air glow discharge power supply control method according to an embodiment of the present invention, such as... Figure 4 As shown, the process includes the following steps:

[0071] Step S401: Monitor the AC signal output from the modulation resonant circuit to the air glow discharge load. See details below. Figure 3 The relevant descriptions of step S301 shown will not be repeated here.

[0072] Step S402: Extract the peak voltage and resonant parameters of the AC signal. See details below. Figure 3 The relevant description of step S302 shown will not be repeated here.

[0073] Step S403: Determine whether the peak voltage exceeds a preset peak voltage threshold. The preset peak voltage threshold is used to characterize the maximum peak voltage when arcing occurs. For details, see [link to relevant documentation]. Figure 3 The relevant description of step S303 shown will not be repeated here.

[0074] Step S404: When the peak voltage is not greater than a preset peak voltage threshold, the operating timing of the controlled switch is adjusted based on the resonance parameters. For details, please refer to... Figure 3 The relevant description of step S304 shown will not be repeated here.

[0075] Specifically, step S404 includes:

[0076] Step S4041: Adjust the operating timing of the controlled switch from the first operating timing corresponding to the resonant parameters to other operating timings.

[0077] In some cases, the operating timing sequence is inconsistent with the first operating timing sequence. For example, if the first operating timing sequence corresponding to the resonant parameter when the load is arcing is A, and the operating timing sequence corresponding to the resonant parameter when the load is in normal air glow discharge is B, then the operating timing sequence of the controlled switch can be changed from A to B to control the controlled switch, thereby increasing the switching losses.

[0078] Since the overall loss of the modulation resonant circuit is minimized and the energy transferred to the load is maximized when the timing of the controlled switch is consistent with the resonant parameters, the timing of the controlled switch is consistent with the resonant parameters when the load is in normal air glow discharge. When arcing occurs, the switching loss of the controlled switch can be increased by adjusting the timing of the controlled switch to be inconsistent with the resonant parameters, thereby reducing the energy transferred to the load. This energy is insufficient to maintain the energy required for arcing, thus achieving the function of arc extinguishing.

[0079] Step S405: After adjusting the timing of the controlled switch, the step of monitoring the AC signal output from the modulation resonant circuit to the load is executed again.

[0080] Step S406: If the peak voltage is detected to be no greater than the preset peak voltage threshold, reduce the output voltage of the DC power supply.

[0081] Specifically, the output voltage of the DC power supply can be reduced to a level sufficient for arc extinguishing in one step. This voltage value can be selected based on experiments or experience to improve arc extinguishing efficiency. Alternatively, the output voltage can be gradually reduced until arc extinguishing is achieved to ensure the stability of the air glow discharge at the load. This invention is not limited thereto.

[0082] If arcing still occurs after adjusting the timing of the controlled switch, it means that simply adjusting the timing of the controlled switch is insufficient to extinguish the arc. By reducing the output voltage of the command power supply, the upper limit of the energy output to the load is reduced, so that the energy is insufficient to maintain the energy required for arcing, thereby achieving the function of extinguishing the arc.

[0083] Step S407: If the peak voltage is detected to be greater than the preset peak voltage threshold, the operating timing of the controlled switch is restored to the second operating timing corresponding to the current resonant parameters of the AC signal.

[0084] The method for determining the second working sequence is similar to that for the first working sequence. For details, please refer to the above description of the first working sequence. It will not be repeated here.

[0085] Therefore, after adjusting the operating timing of the controlled switch, if the arc discharge does not exist, it means that the arc has been extinguished. In order to improve the efficiency of the air glow discharge power supply, the controlled switch is controlled to restore to the optimal operating timing consistent with the resonance parameters, so as to maximize the energy transferred to the load and ensure the stability of the air glow discharge of the load.

[0086] Step S408: After reducing the output voltage of the DC power supply, the step of monitoring the AC signal output to the load by the modulation resonant circuit is executed again.

[0087] Step S409: If the peak voltage is detected to be greater than the preset peak voltage threshold, restore the output voltage of the DC power supply to the normal output voltage.

[0088] The normal output voltage is the voltage required for the glow discharge electrode of the load to perform air glow discharge.

[0089] Step S410: If the peak voltage is not greater than the preset peak voltage threshold, return to the step of reducing the output voltage of the DC power supply until the output voltage of the DC power supply is reduced to the lowest preset voltage threshold, and then perform an alarm and / or control the controlled switch to turn off.

[0090] The minimum preset voltage threshold is the minimum supply voltage corresponding to the normal supply of DC power. If the supply voltage is less than the minimum supply voltage, the DC power supply or load will not work properly. The specific value can be flexibly set according to the type of load, i.e., DC power supply. This invention is not limited thereto.

[0091] Therefore, when the DC power supply output voltage is reduced, the AC signal is re-monitored to determine whether arc extinguishing was successful. If arc extinguishing is successful, the normal output voltage of the DC power supply is restored, improving the efficiency of the air glow discharge power supply and maximizing the energy transferred to the load, thus ensuring the stability of the air glow discharge of the load. If arc extinguishing fails, it means that the energy output to the load is still too high. Therefore, the output voltage of the DC power supply can be further reduced to decrease the energy transferred to the load until arc extinguishing is achieved, ensuring the stability of the air glow discharge of the load. If the arcing still exists even after the DC power supply output voltage is reduced to the minimum value, it means that automatic arc extinguishing cannot be achieved. An alarm is triggered, and manual intervention is required. At the same time, the power supply to the glow discharge power supply can be stopped by turning off the controlled switch to prevent the load from being in an arcing state for a long time, which could cause damage to the devices.

[0092] This embodiment provides a method for controlling an air glow discharge power supply, which can be used for, for example... Figure 1 The controller 103 of the air glow discharge power supply shown is a control chip, such as an MCU or microcontroller. Figure 5This is a flowchart of an air glow discharge power supply control method according to an embodiment of the present invention, such as... Figure 5 As shown, the process includes the following steps:

[0093] Step S501: Monitor the AC signal output from the modulation resonant circuit to the air glow discharge load. See details below. Figure 4 The relevant descriptions of step S401 shown will not be repeated here.

[0094] Step S502: Extract the peak voltage and resonant parameters of the AC signal. See details below. Figure 4 The relevant description of step S402 shown will not be repeated here.

[0095] Step S503: Determine whether the peak voltage exceeds a preset peak voltage threshold. The preset peak voltage threshold is used to characterize the maximum peak voltage when arcing occurs. For details, see [link to relevant documentation]. Figure 4 The relevant description of step S403 shown will not be repeated here.

[0096] Step S504: When the peak voltage is not greater than the preset peak voltage threshold, calculate the voltage difference between the preset peak voltage threshold and the peak voltage.

[0097] Step S505: Determine whether the voltage difference is less than a preset voltage difference threshold.

[0098] The preset voltage difference threshold is used as a critical value to characterize the severity of arcing. Specifically, it can be set based on the maximum voltage difference that can be achieved by adjusting the timing of the controlled switch, as determined by experiments. For example, the maximum voltage difference can be determined as the preset voltage difference threshold, or a certain margin can be reserved on the basis of the maximum voltage difference, and the voltage difference slightly smaller than the maximum voltage difference can be determined as the preset voltage difference threshold. This invention is not limited to this.

[0099] Step S506: When the voltage difference is less than a preset voltage difference threshold, the timing of the controlled switch's operation is adjusted based on the resonance parameters. For details, please refer to... Figure 4 The relevant description of step S404 shown will not be repeated here.

[0100] Step S507: When the voltage difference is not less than a preset voltage difference threshold, reduce the output voltage of the DC power supply.

[0101] The severity of the arcing is determined by comparing the voltage difference between the generated arcing voltage and the peak voltage at the load. If the voltage difference is small, the arcing is not severe, and the arc can be extinguished simply by adjusting the timing of the controlled switch, thus avoiding repeated adjustments to the DC power supply output voltage and keeping the load discharge in a relatively stable state. If the voltage difference is large, it means that the arc cannot be extinguished by adjusting the timing of the controlled switch. In this case, the arc is extinguished directly by reducing the DC power supply output voltage to improve the efficiency of arc handling.

[0102] The air glow discharge power supply control method provided in this embodiment of the invention will be described in detail below with reference to specific application examples.

[0103] For example Figure 2 Taking the air glow discharge power supply shown as an example, the controllable power supply, i.e., the aforementioned DC power supply, is controlled by the power control signal of the controller; the energy input control switch, i.e., the aforementioned controlled switch, is controlled by the switch control signal of the controller; the controllable power supply outputs DC power, and part of the DC power is input to the modulation and resonant network, i.e., the aforementioned modulation and resonant circuit, through the energy input control switch. After passing through the modulation and resonant network, high-frequency AC power is output, and then boosted by the aforementioned boost module to generate high-voltage high-frequency AC power, which is then delivered to the air glow discharge electrode of the load. The waveform information of the high-frequency AC power generated by the modulation and resonant network is input to the feedback module. The feedback module obtains information such as its resonant period, current zero point, and voltage zero point, and processes it into a signal that the controller can receive, and then transmits it to the controller. The waveform information of the high-voltage high-frequency AC power on the air glow discharge electrode is input to the peak detection module. The peak detection module obtains its high-voltage peak information, processes it into a signal that the controller can receive, and then transmits it to the controller.

[0104] The function of each component in the above-mentioned air glow discharge power supply will be introduced below:

[0105] 1. The controllable power supply is controlled by the power control signal of the controller. The power control signal can control whether the controllable power supply outputs and the level of the output voltage.

[0106] 2. The energy input control switch is controlled by the controller's switch control signal, which controls when the energy input control switch is turned on and when it is turned off. When the energy input control switch is on, the DC power output from the controllable power supply can enter the modulation and resonant network through the energy input control switch. When the energy input control switch is off, the DC power output from the controllable power supply cannot enter the modulation and resonant network through the energy input control switch.

[0107] 3. Modulation and resonant networks modulate direct current into high-frequency alternating current at a specified frequency.

[0108] 4. The boost module boosts the high-frequency AC power to a high-voltage, high-frequency AC power that can drive the air glow discharge electrode to discharge.

[0109] 5. The feedback module acquires information such as the resonant period, current zero point, and voltage zero point of the high-frequency AC output from the modulation and resonant network, and generates signals that the controller can receive based on this information, and transmits these signals to the controller.

[0110] 6. The peak detection module acquires the peak information of the high-voltage high-frequency AC current on the air glow discharge electrode, converts it into a high-voltage peak signal that the controller can receive, and transmits this signal to the controller.

[0111] 7. Based on the resonant period, current zero point, and voltage zero point signals provided by the feedback module, the controller can determine the optimal on / off timing of the energy input control switch. The controller provides a switch control signal to drive the energy input control switch. If the switch control signal conforms to the optimal on / off timing, the energy input control switch can operate at its optimal timing, resulting in higher power supply efficiency. If the switch control signal does not conform to the optimal on / off timing, the energy input control switch will not operate at its optimal timing, reducing power supply efficiency, and causing additional energy loss in the energy input control switch and the modulation / resonance network. The controller also receives the high-voltage peak signal from the peak detection module to determine the peak value of the high-voltage, high-frequency AC current on the air glow discharge electrode, thereby determining whether to enter the automatic arc-breaking process.

[0112] The operating principle of the entire air glow discharge power supply is as follows:

[0113] During normal air glow discharge, the arc is a short, thin, and uniform high-frequency discharge arc, and the discharge is intermittent. However, during arcing in air glow discharge, a long and thick arc appears. Therefore, the energy required for arcing is generally greater than that required for normal discharge. Because the arc is long and thick, the peak value of the high-voltage, high-frequency alternating current on the air glow discharge electrodes is generally pulled very low during arcing. Therefore, the peak value of the high-voltage, high-frequency alternating current can be used to determine whether arcing has occurred. If the energy is insufficient to maintain the long and thick arc during arcing, then the long and thick arc will disappear.

[0114] In this embodiment of the invention, the amount of energy input to the modulation and resonant network and its back end is determined by the output of the controllable power supply and the working sequence of the energy input control switch, i.e., the above-mentioned action sequence, because energy can only enter the back end when the energy input control switch is turned on, and the output of the controllable power supply directly determines the upper limit of the energy entering.

[0115] Furthermore, the operating timing of the energy input control switch should correspond to the current zero point, voltage zero point, and resonant period of the modulation and resonant network; otherwise, additional energy losses will occur between the energy input control switch and the modulation and resonant network. The operating timing of the energy input control switch that corresponds to the current zero point, voltage zero point, and resonant period of the modulation and resonant network is called the optimal operating timing. Under normal discharge conditions, the energy input control switch operates at its optimal operating timing. Generally, the optimal operating timing differs between normal discharge and arcing.

[0116] Suppose that at a certain moment, the system suddenly transitions from a normal discharge state to an arcing state. If the timing of the controllable power supply output and energy input control switch is maintained at the optimal timing during normal discharge, then because the optimal timing for arcing differs from the optimal timing for normal discharge, the energy input control switch and the modulation / resonance network will experience additional energy losses. Therefore, the energy used for discharge is reduced. If the energy is reduced enough to dissipate the long, thick arc, the system can recover from the arcing state to the normal discharge state. It should be noted that this timing only needs to differ from the timing corresponding to the resonant period of the arcing state to generate energy losses; it is not limited to the optimal timing under normal discharge conditions.

[0117] If the energy is not low enough to completely eliminate the long, thick arc, the energy limit is reduced by decreasing the output of the controllable power supply. In practical applications, since the energy limit is reduced, it is less necessary to reduce energy through losses; therefore, the energy input control switch can operate at its optimal timing. Once the energy is sufficiently low and the arcing is resolved, the energy limit is restored. For example, the specific process for arcing handling in an air glow discharge power supply is as follows: Figure 6 As shown.

[0118] This embodiment also provides an air glow discharge power supply control device, which is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0119] This embodiment provides an air glow discharge power supply control device, such as... Figure 7 As shown, it includes:

[0120] Monitoring module 701 is used to monitor the AC signal output from the modulation resonant circuit to the load;

[0121] The first processing module 702 is used to extract the peak voltage and resonance parameters of the AC signal;

[0122] The second processing module 703 is used to determine whether the peak voltage is greater than a preset peak voltage threshold, which is used to characterize the maximum peak voltage when arcing discharge occurs.

[0123] The third processing module 704 is used to adjust the timing of the controlled switch based on the resonance parameters when the peak voltage is not greater than the preset peak voltage threshold.

[0124] In some alternative implementations, the third processing module 704 includes:

[0125] The first processing unit is used to adjust the operating timing of the controlled switch from the first operating timing corresponding to the resonance parameter to other operating timings, which are inconsistent with the first operating timing.

[0126] In some optional embodiments, the air glow discharge power supply control device further includes:

[0127] The fourth processing module is used to re-execute the step of monitoring the AC signal output from the modulation resonant circuit to the load after adjusting the operating timing of the controlled switch.

[0128] The fifth processing module is used to reduce the output voltage of the DC power supply if the detected peak voltage is not greater than the preset peak voltage threshold.

[0129] The sixth processing module is used to restore the operating timing of the controlled switch to the second operating timing corresponding to the current resonance parameters of the AC signal if the peak voltage detected is greater than the preset peak voltage threshold.

[0130] In some optional embodiments, the air glow discharge power supply control device further includes:

[0131] The seventh processing module is used to re-execute the step of monitoring the AC signal output to the load by the modulation resonant circuit after reducing the output voltage of the DC power supply;

[0132] The eighth processing module is used to restore the output voltage of the DC power supply to the normal output voltage if the peak voltage detected is greater than the preset peak voltage threshold.

[0133] The ninth processing module is used to return to the step of reducing the output voltage of the DC power supply if the detected peak voltage is not greater than the preset peak voltage threshold, until the output voltage of the DC power supply is reduced to the lowest preset voltage threshold, and then to perform an alarm and / or control the controlled switch to turn off.

[0134] In some optional embodiments, the air glow discharge power supply control device further includes:

[0135] The tenth processing module is used to calculate the voltage difference between the preset peak voltage threshold and the peak voltage before adjusting the operating timing of the controlled switch based on the resonance parameters.

[0136] The eleventh processing module is used to determine whether the voltage difference is less than a preset voltage difference threshold.

[0137] The twelfth processing module is used to call the third processing module 704 when the voltage difference is less than the preset voltage difference threshold.

[0138] The thirteenth processing module is used to reduce the output voltage of the DC power supply when the voltage difference is not less than a preset voltage difference threshold.

[0139] Further functional descriptions of the above modules and units are the same as those in the corresponding embodiments described above, and will not be repeated here.

[0140] In this embodiment, the air glow discharge power supply control device is presented in the form of a functional unit. Here, a unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0141] Please see Figure 8 , Figure 8 This is a schematic diagram of the controller 103 in the air glow discharge power supply provided in the optional embodiment of the present invention, as shown below. Figure 8 As shown, the controller 103 includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions that execute within the computer device, including instructions stored in or on memory to display graphical information of a GUI on an external input / output device (such as a display device coupled to the interface). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 8 Take a processor 10 as an example.

[0142] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0143] The memory 20 stores instructions executable by at least one processor 10 to cause at least one processor 10 to perform the method shown in the above embodiments.

[0144] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the computer device. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0145] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0146] The controller 103 also includes a communication interface 30 for communicating with other devices or communication networks.

[0147] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0148] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for controlling an air glow discharge power supply, characterized in that, The power supply includes: a DC power supply and a modulation resonant circuit connected to the DC power supply. The modulation resonant circuit includes a controlled switch for adjusting the resonant frequency of the modulation resonant circuit. The method includes: Monitor the AC signal output from the modulation resonant circuit to the air glow discharge load; Extract the peak voltage and resonance parameters of the AC signal; Determine whether the peak voltage is greater than a preset peak voltage threshold, wherein the preset peak voltage threshold is used to characterize the maximum peak voltage when arcing discharge occurs; When the peak voltage is not greater than the preset peak voltage threshold, the timing of the controlled switch is adjusted based on the resonance parameters; Repeat the step of monitoring the AC signal output from the modulation resonant circuit to the load; If the peak voltage is detected to be no greater than the preset peak voltage threshold, the output voltage of the DC power supply is reduced. Repeat the step of monitoring the AC signal output from the modulation resonant circuit to the load; If the peak voltage is detected to be greater than the preset peak voltage threshold, the output voltage of the DC power supply will be restored to the normal output voltage. If the peak voltage is detected to be no greater than the preset peak voltage threshold, return to the step of reducing the output voltage of the DC power supply until the output voltage of the DC power supply is reduced to the lowest preset voltage threshold, and then issue an alarm and / or control the controlled switch to turn off.

2. The method according to claim 1, characterized in that, The adjustment of the operating timing of the controlled switch based on the resonance parameters includes: The timing sequence of the controlled switch is adjusted from the first operating timing sequence corresponding to the resonance parameter to another operating timing sequence, wherein the other operating timing sequence is inconsistent with the first operating timing sequence.

3. The method according to claim 1, characterized in that, If the peak voltage is detected to be greater than the preset peak voltage threshold, the operating timing of the controlled switch is restored to the second operating timing corresponding to the current resonance parameter of the AC signal.

4. The method according to any one of claims 1-3, characterized in that, Before adjusting the timing of the controlled switch based on the resonant parameters, the method further includes: Calculate the voltage difference between the preset peak voltage threshold and the peak voltage; Determine whether the voltage difference is less than a preset voltage difference threshold; When the voltage difference is less than the preset voltage difference threshold, the timing of the controlled switch is adjusted based on the resonance parameters; When the voltage difference is not less than the preset voltage difference threshold, the output voltage of the DC power supply is reduced.

5. An air glow discharge power supply control device, characterized in that, The power supply includes: a DC power supply and a modulation resonant circuit connected to the DC power supply. The modulation resonant circuit includes a controlled switch for adjusting the resonant frequency of the modulation resonant circuit. The device includes: The monitoring module is used to monitor the AC signal output from the modulation resonant circuit to the load; The first processing module is used to extract the peak voltage and resonance parameters of the AC signal; The second processing module is used to determine whether the peak voltage is greater than a preset peak voltage threshold, wherein the preset peak voltage threshold is used to characterize the maximum peak voltage when arcing discharge occurs. The third processing module is used to adjust the operating timing of the controlled switch based on the resonance parameters when the peak voltage is not greater than the preset peak voltage threshold. The fourth processing module is used to re-execute the step of monitoring the AC signal output from the modulation resonant circuit to the load after adjusting the operating timing of the controlled switch. The fifth processing module is used to reduce the output voltage of the DC power supply if the detected peak voltage is not greater than a preset peak voltage threshold. The seventh processing module is used to re-execute the step of monitoring the AC signal output to the load by the modulation resonant circuit after reducing the output voltage of the DC power supply; The eighth processing module is used to restore the output voltage of the DC power supply to the normal output voltage if the peak voltage detected is greater than the preset peak voltage threshold. The ninth processing module is used to return to the step of reducing the output voltage of the DC power supply if the detected peak voltage is not greater than the preset peak voltage threshold, until the output voltage of the DC power supply is reduced to the lowest preset voltage threshold, and then to perform an alarm and / or control the controlled switch to turn off.

6. An air glow discharge power supply, characterized in that, include: The DC power supply and the modulation resonant circuit connected to the DC power supply, wherein the modulation resonant circuit is provided with a controlled switch for adjusting the resonant frequency of the modulation resonant circuit, and the air glow discharge power supply further includes: A controller, comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions to perform the air glow discharge power supply control method according to any one of claims 1 to 4.

7. The air glow discharge power supply according to claim 6, characterized in that, The modulation resonant circuit further includes: a modulation and resonant network and a boost module. The input terminal of the modulation and resonant network is connected to the output terminal of the DC power supply through the controlled switch, and the output terminal of the modulation and resonant network is connected to an air glow discharge load through the boost module. The air glow discharge power supply further includes a feedback module and a peak detection module. The feedback module is used to collect waveform information of the resonant period, current zero point, and voltage zero point of the high-frequency AC output of the modulation resonant circuit, and send the waveform information to the controller. The peak detection module is used to collect the peak voltage of the AC signal on the discharge electrode of the air glow discharge load, and send the peak voltage to the controller.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing a computer to execute the air glow discharge power supply control method according to any one of claims 1 to 4.

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