A high-voltage driving power supply control system and control method for a carbon dioxide laser

Abstract

A high-voltage drive power supply control system and method for a carbon dioxide laser, relating to the field of laser medical equipment, includes a host computer main control board, equipment status feedback, laser power supply control wiring board, mains power supply, PFC circuit, PFC control circuit, energy storage capacitor, current sampling unit, filter capacitor, inverter circuit, first freewheeling inductor, second freewheeling inductor, inductor switching component, chopper voltage regulating MOSFET, high-voltage transformer, laser tube, high-voltage current status circuit, DA1 transmission circuit, DA2 transmission circuit, PPS output signal, DA value gating logic circuit, output DA value transmission circuit, power adjustment control circuit, output mode switching circuit, high-voltage current status setting DA value transmission circuit, inverter control circuit, and freewheeling diode. This invention achieves full-dimensional mode adaptive control and microsecond-level real-time dual protection, with extremely fast response and high peak power, reducing equipment cost and improving system reliability and control accuracy.

Description

Technical Field

[0001] This invention relates to the field of laser medical equipment technology, specifically to a high-voltage drive power supply control system and control method for a carbon dioxide laser. Background Technology

[0002] Carbon dioxide laser devices are widely used in the medical field, their core function being to precisely target water molecules in body tissues with laser energy. With continuous technological advancements, super-pulse technology has become the gold standard for treating severe photoaging and atrophic scars due to its advantages such as precise thermal control, comfortable treatment, rapid recovery, and combination with fractional lasers. Super-pulse technology precisely controls the pulse width at the microsecond (μs) level (e.g., <300μs), far less than the thermal relaxation time of skin tissue (approximately 1ms). This allows the laser energy to be absorbed and vaporized by the tissue in a very short time, without the heat having time to diffuse to surrounding normal tissue, thus controlling the thermal damage area (thermal coagulation zone) within an extremely narrow range (as small as within 100 micrometers). Because super-pulse technology causes minimal thermal damage, postoperative redness and swelling are mild, recovery is rapid, significantly reducing the risk of side effects and greatly improving treatment comfort. Combined with fractional lasers, super-pulse technology can create micro-trauma zones while preserving surrounding normal skin, stimulating deep collagen regeneration and achieving the dual purpose of repair and skin rejuvenation.

[0003] However, existing carbon dioxide laser driving power supplies face the following significant technical bottlenecks when implementing the aforementioned ultrapulse technology:

[0004] 1. Limitations of high-voltage side switching devices: Existing technologies rely entirely on high-voltage side switching devices (such as thyristors and high-voltage IGBTs), which have problems such as high withstand voltage, large losses, short lifespan, and low control accuracy, making it difficult to achieve microsecond-level fine waveform control.

[0005] 2. Mismatch between circuit parameters and modes: Existing technologies require large inductors in continuous mode to smooth current, while ultra-pulse mode requires small inductors to achieve microsecond-level fast response. The fixed inductor design in existing technologies leads to a compromise between the performance of continuous and ultra-pulse modes. The power output levels required for continuous operation and ultra-pulse mode differ significantly. The output power level of continuous mode cannot instantaneously excite the laser tube to output high power, while high-power ultra-pulse level power supplies, due to their high electrical power, suffer from poor control accuracy and unstable output in continuous low-power output mode applications.

[0006] 3. The fundamental contradictions in breakdown control under ultra-pulse mode mainly lie in the following points:

[0007] (1) Low power pulse loss: The injected energy is insufficient under low power setting, resulting in incomplete breakdown or pulse loss within the predetermined pulse width time.

[0008] (2) High-power arc: In order to prevent pulse loss, the injection power is increased. Under high power settings, field emission and arc are easily triggered, which can damage the laser tube.

[0009] (3) Existing single DA value control methods cannot simultaneously address both low-power pulse loss and high-power arc control.

[0010] 4. Lack of mode adaptation in control strategy: Existing technology fails to adjust the DA channel logic and current feedback gain synchronously when switching modes, which makes it impossible for the system to achieve optimal performance in both continuous mode and super pulse mode at the same time.

[0011] 5. Delayed safety protection mechanisms: Existing fuses have slow response times (milliseconds / seconds), making it impossible to protect equipment in the instantaneous event of a micropulse fault; or the output protection is based on electronic power switching transistors, resulting in a single protection method. When an abnormality occurs in this part, the protection fails, creating potential safety hazards.

[0012] 6. Cost and performance contradiction: Existing technologies often require expensive high-power carbon dioxide lasers to output high instantaneous power.

[0013] Therefore, there is an urgent need to develop a high-voltage drive power supply control system that can adapt to different mode requirements through full-dimensional adaptive modes (such as synchronous switching of inductance, DA logic, and feedback gain), utilize the characteristics of filter capacitors to adapt injected power to optimize voltage rise rate (dV / dt), and has microsecond-level real-time dual protection. Summary of the Invention

[0014] To address the problems of existing carbon dioxide laser driver power supplies, such as the inability of a single circuit topology to simultaneously handle continuous and superpulse modes, the lack of mode adaptation in control strategies, and the lag and limited scope of traditional protection mechanisms, this invention provides a high-voltage driver power supply control system and method for carbon dioxide lasers.

[0015] This invention provides a high-voltage drive power supply control system and method for carbon dioxide lasers, achieving full-dimensional mode adaptation (synchronous switching of inductance, DA channel logic, and feedback gain) and microsecond-level real-time dual protection. It utilizes filter capacitors to adapt the injected power to optimize the voltage rise rate (dV / dt). Through its full-dimensional mode adaptive mechanism, this invention significantly overcomes the limitations of traditional power supplies on the instantaneous power of lasers. For example, in a typical application, this system can enable a carbon dioxide laser with a continuous power of 30W to generate an instantaneous peak power (e.g., 250-300W) more than 10 times its continuous power in ultrapulse mode. This multiplier and specific value can be dynamically adapted according to the physical characteristics of different laser specifications and preset parameters. It offers significant cost advantages and lowers the equipment threshold.

[0016] The technical solution adopted by this invention to solve the technical problem is as follows:

[0017] This invention provides a high-voltage drive power supply control system for a carbon dioxide laser, comprising:

[0018] An input and PFC module includes a mains power supply, a PFC circuit, a PFC control circuit, and an energy storage capacitor. The input and PFC module is configured to convert the mains power supply into a preset stable DC voltage and dynamically adjust it in the energy storage capacitor.

[0019] The primary-side power conversion module is configured to convert the DC power input and output of the PFC module into a high-frequency power PWM signal according to different preset parameters and light output modes.

[0020] The primary-side power conversion module includes a variable inductor module, which is configured to dynamically adjust the inductance of the main circuit according to the current light output mode, so as to adapt to the response speed and stability requirements under different modes.

[0021] The high-voltage isolation and output module is configured to convert the high-frequency power PWM signal output by the primary-side power conversion module into a high-voltage DC voltage to drive the laser tube to work, and to monitor the current state of the laser tube in real time through a high-voltage current state circuit.

[0022] The feedback and control module is configured to control the input and PFC module, the primary-side power conversion module and the high-voltage isolation and output module to work in an orderly manner according to different preset parameters and light output modes, and in combination with the current state of the laser tube fed back by the high-voltage isolation and output module.

[0023] The feedback and control module includes a multi-channel power setting value selection module, which is configured to select and output a corresponding power setting value in real time from at least two different power setting value sources according to the light output mode and the laser tube current state, so as to control the injection power of the primary side power conversion module.

[0024] The system is equipped with a full-dimensional mode adaptive mechanism, which is used to simultaneously perform dynamic adaptation of inductance, logical adaptation of power setpoint, and dynamic adaptation of feedback gain when switching light output modes.

[0025] Furthermore, the primary-side power conversion module also includes a current sampling unit, a filter capacitor, an inverter circuit, a chopper-regulated MOSFET, and a freewheeling diode; the variable inductor module includes a first freewheeling inductor, a second freewheeling inductor, and an inductor switching component; the high-voltage isolation and output module includes a high-voltage transformer, a laser tube, and a high-voltage current status circuit; the feedback and control module also includes a host computer main control board, equipment status feedback, a laser power supply control terminal block, an output DA value transmission circuit, a power adjustment control circuit, a light output mode switching circuit, a high-voltage current status setting DA value transmission circuit, and an inverter control circuit; the multi-channel power setting value selection module includes a DA1 transmission circuit, a DA2 transmission circuit, and a DA value gating logic circuit.

[0026] Furthermore, the energy storage capacitor provides energy to the filter capacitor and the inverter circuit through the current sampling unit; the current sampling unit feeds back the real-time current output value to the power regulation and control circuit in the form of voltage; the inverter control circuit receives relevant commands from the host computer main control board through the laser power supply control terminal block to control the inverter circuit to operate; after the chopper-regulated MOS transistor switches from on to off, the freewheeling diode conducts the energy stored in the first freewheeling inductor and the second freewheeling inductor back to the positive terminal of the energy storage capacitor through the current sampling unit, forming a freewheeling loop.

[0027] Furthermore, the high-frequency power PWM signal generated by the inverter circuit is transmitted to the high-frequency input of the high-voltage transformer. Under normal operating conditions, the inverter circuit continuously outputs a high-frequency power PWM signal. This signal is converted into a high-voltage PWM signal by a fixed multiple through the high-frequency high-voltage transformer in the high-voltage transformer, and then rectified into a DC voltage by the high-frequency high-voltage rectifier circuit and applied to both sides of the laser tube. When the device emits light in pulse mode, the voltage at the end of the previous pulse emission from the laser tube clamps the voltage on both sides of the filter capacitor through the high-voltage transformer. When the next pulse emission command arrives, the voltage of the filter capacitor remains constant near a preset voltage and then gradually increases.

[0028] Furthermore, the DA value gating logic circuit integrates the relevant analog quantities and signal states given by the high-voltage current state circuit, the DA1 transmission circuit, the DA2 transmission circuit, the PPS output signal, and the output mode switching circuit. The DA value gating logic circuit is configured as follows: in the ultra-pulse output mode, it prioritizes the pre-breakdown power setting value output by the DA1 transmission circuit; when the high-voltage current state circuit detects that the laser tube current reaches a preset breakdown current threshold, the DA value gating logic circuit automatically switches to selecting the steady-state maintenance power setting value output by the DA2 transmission circuit; the high-voltage current state circuit feeds back the detected real-time current state information to the DA value gating logic circuit as the triggering basis for the switching action.

[0029] Furthermore, the first freewheeling inductor, the second freewheeling inductor, and the inductor switching component work together to control and change the inductance value of the main circuit connected to the primary-side power conversion module according to the real-time operating mode. The inductor switching component is configured as follows: in continuous light output mode, the second freewheeling inductor is connected in series to the main circuit to form a large inductance state; in ultra-pulse light output mode, the second freewheeling inductor is short-circuited or bypassed, and only the first freewheeling inductor is connected to the main circuit to form a small inductance state.

[0030] Furthermore, the power regulation control circuit adjusts the analog amplification factor corresponding to the real-time current value given by the current sampling unit according to the relevant control state of the light output mode switching circuit, so as to output different levels of output power in different working modes; in the super pulse mode, the amplification factor is reduced to release peak power, and in the continuous mode, the amplification factor is increased to improve control accuracy and stability.

[0031] Furthermore, the light output mode switching circuit receives different light output mode commands from the host computer main control board through the laser power supply control wiring board, and sends corresponding setting states to the inductor switching component, the DA value gating logic circuit and the power adjustment control circuit, so as to control each part to reach the required working state according to the different preset working modes.

[0032] Furthermore, the host computer main control board calculates relevant data according to the set output parameters and communicates with the high-voltage drive power supply of the carbon dioxide laser through the laser power supply control wiring board; the device status feedback summarizes the relevant device status signals and feeds them back to the high-voltage drive power supply of the carbon dioxide laser through the laser power supply control wiring board; the laser power supply control wiring board receives the communication information from the host computer main control board and, in conjunction with the real-time status of the device status feedback, controls the operation of other parts of the high-voltage drive power supply of the carbon dioxide laser.

[0033] The present invention provides a high-voltage driving power supply control method for a carbon dioxide laser, which specifically includes the following steps:

[0034] (1) Full-dimensional adaptive mechanism;

[0035] When the host computer main control board issues a working mode switching command, the following three adaptation actions are executed simultaneously:

[0036] Action 1: Dynamic adaptation of inductance;

[0037] The variable inductor module in the primary-side power conversion module controls the total inductance of the circuit to a low inductance level in the super pulse mode to improve the response speed, and switches the total inductance of the circuit to a high inductance level in the continuous mode to stabilize the output.

[0038] Action 2: Power setting value logic adaptation;

[0039] In continuous mode, the injected power is controlled by a single constant power setpoint;

[0040] In the superpulse mode, a time-sequential dual-stage power control strategy is adopted: first, the pre-breakdown power setting value is output to drive the laser to break down; after the breakdown signal is detected, it automatically switches to the steady-state maintenance power setting value to drive the laser tube to emit light.

[0041] Action 3: Dynamic adaptation of feedback gain;

[0042] Adjust the gain coefficient of the current sampling feedback signal according to the working mode: reduce the gain coefficient in the ultra-pulse mode to release peak power, and increase the gain coefficient in the continuous mode to improve control accuracy and stability.

[0043] (2) Voltage rise rate optimization mechanism based on filter capacitor characteristics;

[0044] In the initial stage of PPS light output signal triggering, depending on the laser, the corresponding pre-breakdown power setting value is preferentially injected, and the voltage rise rate is optimized by combining the charging characteristics of the filter capacitor; when the breakdown current is detected, it automatically switches to the steady-state maintenance power setting value to maintain stable output.

[0045] (3) The revised PPS signal and the control logic of the power switch;

[0046] When the PPS output signal is high and the power regulation circuit outputs a conduction signal, the power switch is turned on; when the PPS output signal is low, the power switch is forcibly turned off.

[0047] (4) Microsecond-level real-time dual protection mechanism;

[0048] Level 1 protection: When an anomaly is detected, the power switch is turned off in microseconds.

[0049] Second-level protection: When a serious abnormality is detected or the first-level protection fails, the inverter circuit drive signal is cut off in microseconds, forcibly terminating high-frequency operation.

[0050] The beneficial effects of this invention are:

[0051] This invention achieves optimal performance of the same laser tube over a wide power range through full-dimensional mode adaptation (synchronous switching of inductance, DA logic, and feedback gain), and has the following advantages compared with existing technologies:

[0052] 1. Full-dimensional adaptive mode for optimal performance: This invention perfectly resolves the contradiction between the low power level (minimal ripple and high stability) of continuous mode and the high power level (high response) of ultra-pulse mode by synchronously switching the three-dimensional inductance, DA logic, and feedback gain.

[0053] 2. Active adaptation and optimization of voltage rise rate (dV / dt): This invention utilizes the characteristics of the filter capacitor, injects adaptive power through DA1, and precisely controls the voltage rise rate (dV / dt) at the moment of laser tube breakdown by dynamically switching DA1 / DA2 in conjunction with the filter capacitor, thus completely resolving the contradiction between low-power pulse loss and high-power arc.

[0054] 3. Significant cost advantages: This invention enables ordinary low-power laser tubes to generate instantaneous high power (e.g., a 30W tube outputting a peak power of 300W) in ultrapulse mode, with extremely fast response and high peak power, which greatly reduces equipment costs, while retaining the medical advantages of ultrapulse (less thermal damage and faster recovery), meeting the needs of modern medical aesthetics.

[0055] 4. Microsecond-level real-time dual protection: This invention constructs a hierarchical safety system that combines conventional soft protection with abnormal hard protection. The response speed is at the microsecond level, which is much faster than traditional fuses. It effectively prevents instantaneous damage under high-power pulses, thereby ensuring the absolute safety of the equipment under extreme operating conditions.

[0056] 5. Elimination of high-voltage switching devices: This invention adopts a primary-side modulation architecture, which improves system reliability and control accuracy. Attached Figure Description

[0057] Figure 1 The present invention provides a structural block diagram of a high-voltage drive power supply control system for a carbon dioxide laser.

[0058] Figure 2 This is a diagram showing the timing and logic relationship of key control signals in the superpulse mode.

[0059] In the diagram, the components are: 1. Host computer main control board; 2. Equipment status feedback; 3. Laser power supply control wiring board; 4. Main grid power supply; 5. PFC circuit; 6. PFC control circuit; 7. Energy storage capacitor; 8. Current sampling unit; 9. Filter capacitor; 10. Inverter circuit; 11. First freewheeling inductor; 12. Second freewheeling inductor; 13. Inductor switching component; 14. Chopper voltage regulating MOSFET; 15. High voltage transformer; 16. Laser tube; 17. High voltage current status circuit; 18. DA1 transmission circuit; 19. DA2 transmission circuit; 20. PPS output signal; 21. DA value gating logic circuit; 22. Output DA value transmission circuit; 23. Power adjustment control circuit; 24. Output mode switching circuit; 25. High voltage current status setting DA value transmission circuit; 26. Inverter control circuit; and 27. Freewheeling diode. Detailed Implementation

[0060] The present invention will be further described in detail below with reference to the accompanying drawings.

[0061] In a first aspect, the present invention provides a high-voltage drive power supply control system for a carbon dioxide laser.

[0062] like Figure 1 As shown, the high-voltage drive power supply control system for a carbon dioxide laser provided by the present invention mainly includes the following modules:

[0063] Input and PFC module, primary-side power conversion module, high-voltage isolation and output module, and feedback and control module.

[0064] Specifically, the input and PFC module mainly includes a grid power supply 4, a PFC circuit 5, a PFC control circuit 6, and an energy storage capacitor 7. The PFC circuit 5 and the PFC control circuit 6 can convert the grid power supply 4 into a preset stable DC voltage, and dynamically adjust it in the energy storage capacitor 7 to ensure a stable voltage source for the subsequent primary-side power conversion module.

[0065] Specifically, the primary-side power conversion module mainly includes a variable inductor module, a current sampling unit 8, a filter capacitor 9, an inverter circuit 10, a chopper voltage-regulating MOSFET 14, and a freewheeling diode 27; the variable inductor module includes a first freewheeling inductor 11, a second freewheeling inductor 12, and an inductor switching component 13; the primary-side power conversion module converts the DC power from the input and PFC module output into a high-frequency power PWM signal according to different preset parameters and light output modes, and provides it to the subsequent high-voltage isolation and output module and feedback and control module.

[0066] Specifically, the high-voltage isolation and output module mainly includes a high-voltage transformer 15, a laser tube 16, and a high-voltage current status circuit 17. The high-voltage isolation and output module converts the high-frequency power PWM signal output by the primary-side power conversion module into a high-voltage DC voltage to drive the laser tube 16 to work, and transmits the current status of the laser tube 16 to the subsequent feedback and control module in real time through the high-voltage current status circuit 17.

[0067] Specifically, the feedback and control module mainly includes a multi-channel power setpoint selection module, a host computer main control board 1, a device status feedback 2, a laser power supply control wiring board 3, an output DA value transmission circuit 22, a power adjustment control circuit 23, a light output mode switching circuit 24, a high-voltage current status setting DA value transmission circuit 25, and an inverter control circuit 26; the multi-channel power setpoint selection module mainly includes a DA1 transmission circuit 18, a DA2 transmission circuit 19, a PPS light output signal 20, and a DA value gating logic circuit 21; the feedback and control module controls the input and PFC module, the primary side power conversion module, and the high-voltage isolation and output module to work in an orderly manner according to different preset parameters and light output modes, and in combination with the current status of the laser tube 16 fed back by the high-voltage isolation and output module.

[0068] The system adjusts the power of the injected filter capacitor 9 by controlling the duty cycle of the chopper-regulated MOSFET 14. Taking advantage of the fact that the voltage of the filter capacitor 9 cannot change abruptly and the charging rate is proportional to the injected power, the system actively adapts to the optimal voltage rise rate (dV / dt) required for the laser tube to break down.

[0069] The host computer main control board 1 is the control board of the whole machine. It is mainly used to calculate relevant data according to the set output parameters and communicate with the laser power supply through the laser power supply control wiring board 3.

[0070] Equipment status feedback 2 is mainly used to summarize relevant equipment status signals (such as water flow, temperature, etc.) and feed them back to the laser power supply through the laser power supply control terminal block 3.

[0071] The laser power supply control terminal block 3 is connected to the host computer main control board 1, the equipment status feedback 2, the mains power supply 4, the PFC control circuit 6, the high voltage current status circuit 17, the DA1 transmission circuit 18, the DA2 transmission circuit 19, the PPS output signal 20, the output mode switching circuit 24, the high voltage current status setting DA value transmission circuit 25, and the inverter control circuit 26. It is mainly used to receive communication information from the host computer main control board 1 and, in conjunction with the real-time status of the equipment status feedback 2, control the operation of other parts of the laser power supply.

[0072] The mains power supply 4 is connected to the laser power supply control terminal block 3 and the PFC circuit 5 respectively, and is mainly used to power the whole machine.

[0073] The PFC circuit 5 is connected to the mains power supply 4, the PFC control circuit 6, and the energy storage capacitor 7. It is mainly used to utilize the AC power provided by the mains power supply 4 and, according to the control parameters given by the PFC control circuit 6, to control the voltage output by the energy storage capacitor 7 in real time to the set DC voltage.

[0074] The PFC control circuit 6 is connected to the laser power supply control terminal block 3, the PFC circuit 5, and the energy storage capacitor 7. It is mainly used to receive the setting parameters given by the host computer main control board 1 and the actual output voltage value fed back by the energy storage capacitor 7 through the laser power supply control terminal block 3, and then control the PFC circuit 5 to work.

[0075] The energy storage capacitor 7 is connected to the PFC circuit 5, the PFC control circuit 6, the current sampling unit 8, the chopper voltage regulating MOSFET 14 and the freewheeling diode 27 respectively. It is mainly used to store the DC voltage converted by the PFC circuit 5 and to feed back the real-time output voltage value to the PFC control circuit 6.

[0076] The current sampling unit 8 is connected to the energy storage capacitor 7, the filter capacitor 9, and the inverter circuit 10, as well as the power regulation control circuit 23 and the freewheeling diode 27. Specifically, the current sampling unit 8 is connected to the positive terminal of the energy storage capacitor 7; the current sampling unit 8 is connected to the circuit formed by the parallel connection of the filter capacitor 9 and the inverter circuit 10; and the current sampling unit 8 is connected to the power regulation control circuit 23. During circuit operation, the energy storage capacitor 7 provides energy to the filter capacitor 9 and the inverter circuit 10 through the current sampling unit 8, while the current sampling unit 8 feeds back the real-time current output value to the power regulation control circuit 23 in the form of voltage. The positive terminal of the current sampling unit 8 is connected to the cathode of the freewheeling diode 27.

[0077] The positive terminal of the filter capacitor 9 is connected to the current sampling unit 8. At the same time, the filter capacitor 9 serves as the filter capacitor of the inverter circuit 10, and its negative terminal is connected to one end of the first freewheeling inductor 11.

[0078] The inverter circuit 10 is connected in parallel with the filter capacitor 9, and the filter capacitor 9 is connected in parallel at the input terminal of the inverter circuit 10; the inverter circuit 10 is connected to the first freewheeling inductor 11; the inverter circuit 10 is connected to the high voltage transformer 15, and the high frequency power PWM signal generated by the inverter circuit 10 is transmitted to the high frequency input of the high voltage transformer 15.

[0079] One end of the first freewheeling inductor 11 is connected to the negative terminal of the filter capacitor 9 and the inverter circuit 10 respectively; the other end of the first freewheeling inductor 11 is connected to one end of the second freewheeling inductor 12 and one end of a set of power contacts of the inductor switching component 13 respectively.

[0080] The second freewheeling inductor 12 is connected in series with the first freewheeling inductor 11. The second freewheeling inductor 12 is connected in parallel with one end of a set of power contacts of the inductor switching component 13. The second freewheeling inductor 12 is connected to the chopper voltage-regulating MOSFET 14 and the freewheeling diode 27 respectively.

[0081] The first freewheeling inductor 11 and the second freewheeling inductor 12 together form the current limiting and freewheeling total inductor inside the primary-side power conversion module, which is controlled by controlling the on / off state of the power contacts of the inductor switching component 13 according to different light output modes.

[0082] One end of a set of power contacts of the inductor switching component 13 is connected to the first freewheeling inductor 11, and the other end of a set of power contacts of the inductor switching component 13 is connected in parallel with the second freewheeling inductor 12. The inductor switching component 13 is connected to the chopper-regulated MOSFET 14. The control interface of the inductor switching component 13 is connected to the light output mode switching circuit 24. The opening and closing of the power contacts of the inductor switching component 13 are controlled by the light output mode switching circuit 24 under different light output modes. The main function of the inductor switching component 13 is to control the inductance of the main circuit according to the light output mode status information given by the light output mode switching circuit 24, including but not limited to controllable devices such as power switching electronic devices and relays.

[0083] The drain (D) of the chopper-regulated MOSFET 14 is connected to the cathode of the freewheeling diode 27 and the other end of the second freewheeling inductor 12, i.e., the end not connected to the first freewheeling inductor 11. The chopper-regulated MOSFET 14 is connected to the inductor switching assembly 13. The source (S) of the chopper-regulated MOSFET 14 is connected to the negative terminal of the energy storage capacitor 7, forming a power energy injection circuit. The chopper-regulated MOSFET 14 is connected to the power regulation control circuit 23, which is used to regulate the switching signal of the chopper-regulated MOSFET 14.

[0084] The high-voltage transformer 15 includes a high-frequency high-voltage transformer and a set of high-frequency high-voltage rectifier circuits. Its low-voltage high-frequency input terminal is connected to the output terminal of the inverter circuit 10. The PWM high-frequency power generated by the inverter circuit 10 is transferred to the high-frequency input of the high-voltage transformer 15. One end of the high-voltage DC output terminal of the high-voltage transformer 15 is connected to the negative terminal of the laser tube 16, and the other end is connected to the high-voltage current state circuit 17. The laser tube 16, as the core component for emitting laser light in the device, has its positive terminal connected to the high-voltage current state circuit 17 and its negative terminal connected to the high-voltage DC output terminal of the high-voltage transformer 15.

[0085] When the equipment is functioning normally, the inverter circuit 10 continuously outputs a high-frequency power PWM signal. This high-frequency power PWM signal is converted into a high-voltage PWM signal by a fixed multiple through the high-frequency high-voltage transformer in the high-voltage transformer 15, and then rectified into a corresponding DC voltage by a set of high-frequency high-voltage rectifier circuits and applied to both sides of the laser tube 16. When the equipment emits light in pulse mode, the voltage at the end of the previous pulse emission of the laser tube 16 will clamp the voltage on both sides of the filter capacitor 9 through the high-voltage transformer 15. When the next pulse emission command arrives, the voltage of the filter capacitor 9 remains constant at a fixed voltage, and thus the voltage begins to gradually increase.

[0086] The high-voltage current status circuit 17 is connected to the positive terminal of the high-voltage transformer 15 and the positive terminal of the laser tube 16. The high-voltage current status circuit 17 is connected to the laser power supply control terminal block 3, the DA value selection logic circuit 21, and the high-voltage current status setting DA value transmission circuit 25, respectively. The high-voltage current status circuit 17 receives the setting data given by the high-voltage current status setting DA value transmission circuit 25 and feeds back the relevant current status information to the DA value selection logic circuit 21 and the host computer main control board 1. The signal fed back to the DA value selection logic circuit is used to switch the DA value to realize the switching of the output power after the carbon dioxide laser pre-ionization is completed. The signal fed back to the host computer main control board is used to feed back the laser tube output status to the host computer main control board.

[0087] The DA1 transmission circuit 18 is connected to the laser power control terminal block 3 and the DA value selection logic circuit 21 respectively. The DA1 transmission circuit 18 receives the parameters sent by the host computer main control board 1 through the laser power control terminal block 3 and transmits them to the DA value selection logic circuit 21. It mainly plays the role of isolation and transmission.

[0088] The DA2 transmission circuit 19 is connected to the laser power control terminal block 3 and the DA value selection logic circuit 21 respectively. The DA2 transmission circuit 19 receives the parameters sent by the host computer main control board 1 through the laser power control terminal block 3 and transmits them to the DA value selection logic circuit 21. It mainly plays the role of isolation and transmission.

[0089] The PPS output signal 20 is connected to the laser power control terminal block 3, the DA value gating logic circuit 21, and the power adjustment control circuit 23, respectively. The PPS output signal 20 receives the output signal sent by the host computer main control board 1 through the laser power control terminal block 3 and transmits it to the DA value gating logic circuit 21 and the power adjustment control circuit 23, respectively, which mainly plays the role of isolation and real-time transmission.

[0090] The DA value gating logic circuit 21 is connected to the high voltage current state circuit 17, the DA1 transmission circuit 18, the DA2 transmission circuit 19, the PPS light output signal 20, the output DA value transmission circuit 22, and the light output mode switching circuit 24, respectively. The DA value gating logic circuit 21 integrates the relevant analog quantities and signal states given by the high voltage current state circuit 17, the DA1 transmission circuit 18, the DA2 transmission circuit 19, the PPS light output signal 20, and the light output mode switching circuit 24, and transmits different DA values ​​to the output DA value transmission circuit 22 in real time according to the preset logic.

[0091] The output DA value transmission circuit 22 is connected to the DA value gating logic circuit 21 and the power regulation control circuit 23 respectively; the output DA value transmission circuit 22 transmits the DA value given by the DA value gating logic circuit 21 to the power regulation control circuit 23 in real time.

[0092] The power regulation control circuit 23 is connected to the current sampling unit 8, the chopper-regulated MOSFET 14, the PPS light output signal 20, the output DA value transmission circuit 22, and the light output mode switching circuit 24, respectively. The power regulation control circuit 23 adjusts the switching signal of the chopper-regulated MOSFET 14 by comparing the analog quantity corresponding to the real-time current value fed back by the current sampling unit 8 with the set DA value analog quantity given by the output DA value transmission circuit 22. The power regulation control circuit 23 receives the PPS light output signal 20 to start working. The power regulation control circuit 23 adjusts the analog quantity amplification factor corresponding to the real-time current value given by the current sampling unit 8 according to the relevant control state of the light output mode switching circuit 24, so as to output different levels of output power in different working modes.

[0093] The light output mode switching circuit 24 is connected to the laser power control terminal block 3, the inductor switching component 13, the DA value gating logic circuit 21, and the power adjustment control circuit 23, respectively. After receiving different light output modes from the host computer main control board 1 through the laser power control terminal block 3, the light output mode switching circuit 24 sends corresponding setting states to the inductor switching component 13, the DA value gating logic circuit 21, and the power adjustment control circuit 23 to control each part to reach the required working state according to the different preset working modes.

[0094] The high-voltage current state setting DA value transmission circuit 25 is connected to the laser power supply control terminal block 3 and the high-voltage current state circuit 17 respectively. The high-voltage current state setting DA value transmission circuit 25 receives the analog high-voltage current state setting DA value given by the host computer main control board 1 with different settings through the laser power supply control terminal block 3, and transmits it to the high-voltage current state circuit 17.

[0095] The inverter control circuit 26 is connected to the laser power supply control terminal block 3 and the inverter circuit 10 respectively; the inverter control circuit 26 receives relevant commands from the host computer main control board 1 through the laser power supply control terminal block 3 to control the inverter circuit 10 to work.

[0096] The cathode of the freewheeling diode 27 is connected to both the current sampling unit 8 and the positive terminal of the energy storage capacitor 7. The anode of the freewheeling diode 27 is connected to the drain (D) of the chopper-regulated MOSFET 14 and the other end of the second freewheeling inductor 12, which is not connected to the first freewheeling inductor 11. The main function of the freewheeling diode 27 is to conduct the energy stored in the first freewheeling inductor 11 and the second freewheeling inductor 12 back to the positive terminal of the energy storage capacitor 7 through the current sampling unit 8 after the chopper-regulated MOSFET 14 switches from conduction to turn-off at high frequency, forming a freewheeling circuit. This ensures that the energy injected into the filter capacitor 9 is relatively stable and continuous, while preventing the energy stored in the first freewheeling inductor 11 and the second freewheeling inductor 12 from generating a turn-off overvoltage and burning out the chopper-regulated MOSFET 14 when it is turned off.

[0097] Figure 2 This document details the entire timing logic of the system in Super-pulse mode, from mode pre-configuration to pulse output completion. The horizontal axis represents time t, and the vertical axis displays the waveform changes of six key control and status signals. Their specific definitions and logical relationships are as follows:

[0098] 1. Signal 1: Light output mode setting signal;

[0099] The light output mode setting signal is a mode command issued by the host computer main control board 1. A high level represents ultra-pulse mode, and a low level represents continuous mode. At time t0, the light output mode setting signal jumps to a high level, triggering the system to enter the ultra-pulse working preparation state.

[0100] 2. Signal 2: Second freewheeling inductor release / short-circuit control signal;

[0101] The second freewheeling inductor release / short-circuit control signal is a hardware inductance matching command issued by the light output mode switching circuit 24. At time t0 (the instant of mode switching), the second freewheeling inductor release / short-circuit control signal responds to the jump of the light output mode setting signal and controls the inductor switching component 13 to operate.

[0102] High level: Controls the second freewheeling inductor 12 to be shorted / bypassed, leaving only the first freewheeling inductor 11 connected to the main circuit, forming a small inductance state to meet the microsecond-level response speed requirement of the ultrapulse mode.

[0103] Low level (continuous mode): Controls the second freewheeling inductor 12 to be connected in series, forming a large inductance state.

[0104] The second freewheeling inductor release / short-circuit control signal is completed and remains stable before the light output command (PPS) arrives (i.e., during t0 to t1), ensuring the absolute constant inductance during laser tube operation and eliminating the risk of high-voltage dynamic switching.

[0105] 3. Signal 3: PPS light signal;

[0106] The PPS output signal is the laser pulse trigger command. As the master gate for the pulse width, the PPS output signal controls the time window for energy injection. At time t1: the PPS output signal jumps to a high level, marking the start of the current pulse period and allowing power injection. At time t3: the PPS output signal jumps to a low level, forcibly terminating the current pulse; regardless of its internal state, the chopper-regulated MOSFET 14 is immediately turned off.

[0107] 4. Signal 4: DA value selection setting signal;

[0108] The DA value selection setting signal reflects the power setting channel currently selected by the system (DA1 transmission circuit 18 or DA2 transmission circuit 19). During the t1 to t2 stage (pre-breakdown period): the DA value selection setting signal is at a low level (or corresponds to the state of DA1 transmission circuit 18), the system selects DA1 transmission circuit 18, and outputs the pre-breakdown power setting value. During this stage, the characteristics of the filter capacitor are utilized to drive the laser tube pre-ionization with an optimized voltage rise rate (dV / dt). At t2 (breakdown trigger point): when the laser tube breakdown current is detected, the DA value selection setting signal jumps to a high level (or corresponds to the state of DA2 transmission circuit 19), the system automatically switches to select DA2 transmission circuit 19, and outputs the steady-state maintenance power setting value. During the t2 to t3 stage (steady-state light output period): the DA value selection setting signal remains at a high level, maintaining stable light output from the laser tube.

[0109] The switching logic of the DA value gating setting signal is independent of the PPS output signal and relies solely on breakdown detection, ensuring precise segmented control of the power strategy within the pulse period.

[0110] 5. Signal 5: Laser tube breakdown signal;

[0111] The laser tube breakdown signal is a real-time current status indicator fed back by the high-voltage current status setpoint transmission circuit 25. During the period from t1 to t2, the current is at a pre-ionization level in the microamp / milliamp range, and the laser tube breakdown signal is low. At time t2, the laser tube gas breaks down, and the current jumps instantaneously from a few mA to hundreds of mA (a difference of nearly a hundredfold), causing the laser tube breakdown signal to immediately jump to a high level. The laser tube breakdown signal serves as the sole trigger for DA value switching (DA value gating setting signal). Due to the extremely large current step amplitude, this laser tube breakdown signal has a very high signal-to-noise ratio, allowing for accurate identification within microseconds without complex filtering, directly driving the control logic switching.

[0112] 6. Signal 6: Chopper-regulated MOSFET drive waveform;

[0113] The chopper-regulated MOSFET drive waveform is the final power switch drive signal output by the power regulation control circuit 23. Turn-on condition: The PPS output signal is high and the power regulation circuit outputs a turn-on command.

[0114] From t1 to t2: The chopper-regulated MOSFET 14 operates in high-frequency PWM mode, injecting the pre-breakdown power setting value set by the DA1 transmission circuit 18. From t2 to t3: The chopper-regulated MOSFET 14 continues to operate, but adjusts its duty cycle according to the setting value of the DA2 transmission circuit 19 to maintain steady-state power. At t3: The PPS output signal goes low, the drive signal of the chopper-regulated MOSFET 14 is forced to zero, and energy injection immediately stops, completing one pulse cycle. If an abnormality (such as overcurrent) is detected during t1-t3, the drive signal of this power switch will be forcibly turned off within microseconds (first-level protection).

[0115] Timing Summary: The system first completes hardware inductance matching at time t0 (Action 1); then, at time t1, it responds to the PPS output signal and initiates pre-breakdown power injection (DA1 transmission circuit 18); utilizing the physical step characteristics of the laser tube breakdown current (laser tube breakdown signal), it automatically switches to steady-state sustaining power at time t2 (DA2 transmission circuit 19, Action 2); finally, at time t3, it is forcibly shut down as the PPS output signal ends. The entire process achieves full-dimensional control with mode pre-configuration, breakdown adaptation, and microsecond-level response, ensuring high stability and high safety of the ultrapulse output.

[0116] Secondly, the present invention provides a method for controlling a high-voltage driving power supply for a carbon dioxide laser.

[0117] The present invention provides a high-voltage driving power supply control method for a carbon dioxide laser, which specifically includes the following steps:

[0118] I. Full-dimensional adaptive mechanism;

[0119] When the host computer main control board 1 issues a working mode switching command, the light output mode switching circuit 24 simultaneously performs the following three adaptation actions:

[0120] 1. Action 1: Hardware inductance matching;

[0121] The inductor switching component 13 operates only during mode switching; in continuous mode, it releases the second freewheeling inductor and connects it to the main circuit, thereby connecting the large inductor; in overpulse mode, it short-circuits the second freewheeling inductor 12 and retains only the first freewheeling inductor 11.

[0122] (1) Continuous mode: The host computer main control board 1 issues a setting command, which controls the inductor switching component 13 to disconnect through the light output mode switching circuit 24. The second freewheeling inductor 12 is connected in series, and the total inductance of the circuit is maximized. The large inductance, together with the filter capacitor 9, can greatly suppress current ripple and ensure high stability of continuous light output.

[0123] (2) Super Pulse Mode: The host computer main control board 1 issues a setting command, which controls the inductor switching component 13 to short-circuit the second freewheeling inductor 12 through the light output mode switching circuit 24, leaving only the first freewheeling inductor 11, thus minimizing the total inductance of the circuit. The small inductance can significantly reduce the circuit time constant and improve the system's response speed to microsecond-level power changes.

[0124] (3) Status maintenance: After the host computer main control board 1 issues the setting command, the light output mode switching circuit 24 reads the corresponding command in real time to control the inductor switching component 13 to maintain the status until the next mode switch.

[0125] 2. Action Two: DA Channel Logic Adaptation;

[0126] The DA value selection logic circuit 21 dynamically selects the input logic of either the DA1 transmission circuit 18 or the DA2 transmission circuit 19 according to the mode switching instruction.

[0127] (1) Continuous mode: The light output mode switching circuit 24 controls the DA value selection logic circuit 21 to be configured as a single-channel locked mode according to the light output mode setting information sent by the host computer main control board 1. It only receives and transmits the setting value (steady-state maintenance power) of the DA2 transmission circuit 19 to the output DA value transmission circuit 22. The system maintains a constant injection power.

[0128] (2) Ultra-pulse mode: The light output mode switching circuit 24 controls the DA value selection logic circuit 21 to be configured as a dual-channel dynamic switching mode according to the light output mode setting information sent by the host computer main control board 1.

[0129] In the initial stage of PPS output signal 20 triggering, DA value selection logic circuit 21 prioritizes the selection of the set value of DA1 transmission circuit 18, i.e., the pre-breakdown adaptation power.

[0130] When the high-voltage current state circuit 17 detects the breakdown current, the DA value selection logic circuit 21 automatically switches to the set value of the DA2 transmission circuit 19, i.e., the steady-state maintenance power.

[0131] The switching logic for the DA value is independent and will not stop when the PPS output signal 20 stops. Even if the PPS signal ends, the DA value gating logic circuit 21 and the output DA value transmission circuit 22 will still maintain the current DA value setting state as the reference for the next output, ensuring the stability of the DA value.

[0132] 3. Action Three: Feedback Gain Factor Adaptation;

[0133] According to the mode switching command, the power regulation control circuit 23 adjusts the amplification factor of the feedback signal from the current sampling unit 8.

[0134] (1) Continuous mode: The power regulation control circuit 23 sets the amplification factor of the feedback signal of the current sampling unit 8 to high gain in order to enhance the negative feedback depth and suppress current ripple.

[0135] (2) Super Pulse Mode: The power regulation control circuit 23 sets the amplification factor of the feedback signal of the current sampling unit 8 to a low gain in order to reduce the negative feedback depth, allow the current to rise rapidly, and release the peak power.

[0136] II. Voltage rise rate (dV / dt) optimization mechanism based on filter capacitor power adaptation;

[0137] In super-pulse mode, combined with the above DA channel logic adaptation:

[0138] Phase 1 (DA1 Control): In the initial stage of PPS output signal 20 triggering, DA value selection logic circuit 21 prioritizes the selection of the set value DA1, i.e., pre-breakdown adaptation power, of DA1 transmission circuit 18. At the same time, utilizing the charging characteristics of filter capacitor 9, DA1 adaptation power is injected to generate an optimized voltage rise rate (dV / dt), achieving uniform pre-ionization and reliable breakdown, preventing pulse loss during low-power parameter operation and arc discharge of the laser during high-power parameter operation.

[0139] The filter capacitor 9 is dynamically clamped to the voltage across the carbon dioxide laser by the high-voltage pack 15 in real time. The presence of the filter capacitor 9 can change the voltage change rate across the laser tube. With proper matching of the filter capacitor 9 and the charging power, the optimal voltage change rate across the laser tube can be obtained.

[0140] Phase 2 (DA2 control): When the high-voltage current state circuit 17 detects the breakdown current, the DA value selection logic circuit 21 automatically switches to the set value DA2 of the DA2 transmission circuit 19, which is the steady-state maintenance power, to maintain stable output.

[0141] III. The revised PPS signal and the control logic of chopper-regulated MOSFET 14;

[0142] To ensure the stability of the DA value and accurately control the light output, the system uses the following logic to drive the chopper-regulated MOSFET 14:

[0143] (1) Independence of DA value paths;

[0144] The DA values ​​(DA1 or DA2) input to the DA value gating logic circuit 21, the output DA value transmission circuit 22, and the power regulation control circuit 23 do not stop when the PPS output light signal 20 stops. The DA value always exists as a setting reference, and only changes during mode switching or at specific logic nodes within the pulse cycle (such as breakdown detection).

[0145] (2) Generation of MOS transistor drive signals;

[0146] The switching signal of the chopper voltage regulator MOSFET 14 is not directly controlled by the PPS signal, but is generated by performing a logical AND operation between the PPS light output signal 20 and the output signal of the power regulation control circuit 23.

[0147] (3) Generation of the output signal of the power regulation control circuit 23;

[0148] The power regulation control circuit 23 compares the set analog DA value given by the output DA value transmission circuit 22 with the real-time analog current value fed back by the current sampling unit 8 (error amplification), thereby generating an output signal.

[0149] (4) Logical relationships;

[0150] When the PPS light output signal 20 is high (light output command is valid) and the power regulation control circuit 23 outputs the regulation signal that needs to be turned on, the chopper voltage regulation MOSFET 14 is turned on.

[0151] When the PPS light output signal 20 is low (light output command is invalid), the chopper voltage regulating MOSFET 14 is forcibly turned off regardless of the output of the power regulation control circuit 23.

[0152] This logic ensures that the system adjusts power based on the DA value and current feedback only when the user issues a light output command (PPS signal); once the PPS signal ends, the MOSFET is immediately turned off to stop energy injection, but the DA value setting logic remains unchanged to prepare for the next light output.

[0153] IV. Microsecond-level real-time dual protection mechanism;

[0154] Level 1: Conventional real-time protection (microsecond-level soft cut-off), i.e., microsecond-level control of chopper-regulated MOSFET 14 to turn off;

[0155] When overcurrent or abnormal water flow is detected, the duty cycle of the chopper-regulated MOSFET 14 is immediately reduced to zero. The response time is in the microsecond range and is recoverable.

[0156] Level 2: Emergency protection against abnormalities (microsecond-level hard cut-off), which means cutting off the inverter circuit 10 drive signal at the microsecond level and forcibly terminating high-frequency operation;

[0157] When the conventional real-time protection fails or a serious fault occurs, the signal to the inverter control circuit 26 is directly cut off, forcing the inverter circuit 10 to switch from a long-term operating state to a terminated operating state. The response time is in the microsecond range, completely cutting off the high-frequency energy source.

[0158] V. Control methods in continuous mode;

[0159] When the inductor switching component 13 releases the second freewheeling inductor and connects it to the main circuit, the system achieves smooth and stable continuous light output under the triple adaptation of (large inductance), DA channel logic locking (single channel), and gain adjustment (high gain). If an abnormality occurs, a microsecond-level real-time dual protection mechanism is also triggered.

[0160] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-voltage drive power supply control system for a carbon dioxide laser, characterized in that, include: The input and PFC module includes a grid power supply, a PFC circuit, a PFC control circuit, and an energy storage capacitor. The input and PFC module is configured to convert the grid power supply into a preset stable DC voltage and dynamically adjust it in the energy storage capacitor. The primary-side power conversion module is configured to convert the DC power input and output of the PFC module into a high-frequency power PWM signal according to different preset parameters and light output modes. The primary-side power conversion module includes a variable inductor module, which is configured to dynamically adjust the inductance of the main circuit according to the current light output mode, so as to adapt to the response speed and stability requirements under different modes. The high-voltage isolation and output module is configured to convert the high-frequency power PWM signal output by the primary-side power conversion module into a high-voltage DC voltage to drive the laser tube to work, and to monitor the current state of the laser tube in real time through a high-voltage current state circuit. The feedback and control module is configured to control the input and PFC module, the primary-side power conversion module and the high-voltage isolation and output module to work in an orderly manner according to different preset parameters and light output modes, and in combination with the current state of the laser tube fed back by the high-voltage isolation and output module. The feedback and control module includes a multi-channel power setting value selection module, which is configured to select and output a corresponding power setting value in real time from at least two different power setting value sources according to the light output mode and the laser tube current state, so as to control the injection power of the primary side power conversion module. The system is equipped with a full-dimensional mode adaptive mechanism, which is used to simultaneously perform dynamic adaptation of inductance, logical adaptation of power setpoint, and dynamic adaptation of feedback gain when switching light output modes.

2. The high-voltage drive power supply control system for a carbon dioxide laser according to claim 1, characterized in that, The primary-side power conversion module further includes a current sampling unit, a filter capacitor, an inverter circuit, a chopper-regulated MOSFET, and a freewheeling diode; the variable inductor module includes a first freewheeling inductor, a second freewheeling inductor, and an inductor switching component; the high-voltage isolation and output module includes a high-voltage transformer, a laser tube, and a high-voltage current status circuit; the feedback and control module further includes a host computer main control board, equipment status feedback, a laser power supply control terminal block, an output DA value transmission circuit, a power adjustment control circuit, a light output mode switching circuit, a high-voltage current status setting DA value transmission circuit, and an inverter control circuit; the multi-channel power setting value selection module includes a DA1 transmission circuit, a DA2 transmission circuit, and a DA value gating logic circuit.

3. The high-voltage drive power supply control system for a carbon dioxide laser according to claim 2, characterized in that, The energy storage capacitor provides energy to the filter capacitor and the inverter circuit through the current sampling unit; the current sampling unit feeds back the real-time current output value to the power regulation and control circuit in the form of voltage; the inverter control circuit receives relevant commands from the host computer main control board through the laser power supply control terminal block to control the inverter circuit to operate; after the chopper-regulated MOS transistor switches from on to off, the freewheeling diode conducts the energy stored in the first freewheeling inductor and the second freewheeling inductor back to the positive terminal of the energy storage capacitor through the current sampling unit, forming a freewheeling loop.

4. The high-voltage drive power supply control system for a carbon dioxide laser according to claim 2, characterized in that, The high-frequency power PWM signal generated by the inverter circuit is transmitted to the high-frequency input of the high-voltage transformer. Under normal equipment conditions, the inverter circuit continuously outputs a high-frequency power PWM signal. This signal is converted into a high-voltage PWM signal by a fixed multiple through the high-frequency high-voltage transformer in the high-voltage transformer, and then rectified into a DC voltage by the high-frequency high-voltage rectifier circuit and applied to both sides of the laser tube. When the equipment emits light in pulse mode, the voltage at the end of the previous pulse of light emission from the laser tube is clamped by the high-voltage transformer to the voltage on both sides of the filter capacitor. When the next pulse emission command arrives, the voltage of the filter capacitor remains constant near the preset voltage and then gradually increases.

5. A high-voltage drive power supply control system for a carbon dioxide laser according to claim 2, characterized in that, The DA value gating logic circuit integrates the relevant analog quantities and signal states given by the high-voltage current state circuit, the DA1 transmission circuit, the DA2 transmission circuit, the PPS output signal, and the output mode switching circuit. The DA value gating logic circuit is configured to: in ultra-pulse output mode, prioritize the pre-breakdown power setting value output by the DA1 transmission circuit; when the high-voltage current state circuit detects that the laser tube current reaches a preset breakdown current threshold, the DA value gating logic circuit automatically switches to selecting the steady-state maintenance power setting value output by the DA2 transmission circuit; the high-voltage current state circuit feeds back the detected real-time current state information to the DA value gating logic circuit as the trigger for the switching action.

6. A high-voltage drive power supply control system for a carbon dioxide laser according to claim 2, characterized in that, The first freewheeling inductor, the second freewheeling inductor, and the inductor switching component work together to control and change the inductance of the main circuit connected to the primary-side power conversion module according to the real-time operating mode. The inductor switching component is configured as follows: in continuous light output mode, the second freewheeling inductor is connected in series to the main circuit to form a large inductance state; in ultra-pulse light output mode, the second freewheeling inductor is short-circuited or bypassed, and only the first freewheeling inductor is connected to the main circuit to form a small inductance state.

7. A high-voltage drive power supply control system for a carbon dioxide laser according to claim 2, characterized in that, The power regulation control circuit adjusts the analog amplification factor corresponding to the real-time current value given by the current sampling unit according to the relevant control state of the light output mode switching circuit, so as to output different levels of output power in different working modes; in the super pulse mode, the amplification factor is reduced to release peak power, and in the continuous mode, the amplification factor is increased to improve control accuracy and stability.

8. A high-voltage drive power supply control system for a carbon dioxide laser according to claim 2, characterized in that, The light output mode switching circuit receives different light output mode commands from the host computer main control board through the laser power supply control terminal board, and sends corresponding setting states to the inductor switching component, the DA value gating logic circuit and the power adjustment control circuit, so as to control each part to reach the required working state according to the different preset working modes.

9. A high-voltage drive power supply control system for a carbon dioxide laser according to claim 2, characterized in that, The host computer main control board calculates relevant data according to the set output parameters and communicates with the high-voltage drive power supply of the carbon dioxide laser through the laser power supply control wiring board; the device status feedback summarizes the relevant status signals of the device and feeds them back to the high-voltage drive power supply of the carbon dioxide laser through the laser power supply control wiring board; the laser power supply control wiring board receives the communication information from the host computer main control board and, in combination with the real-time status of the device status feedback, controls the operation of other parts of the high-voltage drive power supply of the carbon dioxide laser.

10. A method for controlling a high-voltage drive power supply for a carbon dioxide laser, implemented using a high-voltage drive power supply control system for a carbon dioxide laser as described in any one of claims 1-9, characterized in that... Includes the following steps: (1) Full-dimensional adaptive mechanism; When the host computer main control board issues a working mode switching command, the following three adaptation actions are executed simultaneously: Action 1: Dynamic adaptation of inductance; The variable inductor module in the primary-side power conversion module controls the total inductance of the circuit to a low inductance level in the super pulse mode to improve the response speed, and switches the total inductance of the circuit to a high inductance level in the continuous mode to stabilize the output. Action 2: Power setting value logic adaptation; In continuous mode, the injected power is controlled by a single constant power setpoint; In the superpulse mode, a time-sequential dual-stage power control strategy is adopted: first, the pre-breakdown power setting value is output to drive the laser to break down; after the breakdown signal is detected, it automatically switches to the steady-state maintenance power setting value to drive the laser tube to emit light. Action 3: Dynamic adaptation of feedback gain; Adjust the gain coefficient of the current sampling feedback signal according to the working mode: reduce the gain coefficient in the ultra-pulse mode to release peak power, and increase the gain coefficient in the continuous mode to improve control accuracy and stability. (2) Voltage rise rate optimization mechanism based on filter capacitor characteristics; In the initial stage of PPS light output signal triggering, depending on the laser, the corresponding pre-breakdown power setting value is preferentially injected, and the voltage rise rate is optimized by combining the charging characteristics of the filter capacitor; when the breakdown current is detected, it automatically switches to the steady-state maintenance power setting value to maintain stable output. (3) The revised PPS signal and the control logic of the power switch; When the PPS output signal is high and the power regulation circuit outputs a conduction signal, the power switch is turned on; when the PPS output signal is low, the power switch is forcibly turned off. (4) Microsecond-level real-time dual protection mechanism; Level 1 protection: When an anomaly is detected, the power switch is turned off in microseconds. Second-level protection: When a serious abnormality is detected or the first-level protection fails, the inverter circuit drive signal is cut off in microseconds, forcibly terminating high-frequency operation.

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