Short-pulse high-repetition-frequency driving circuit and method suitable for compact ring gas injection valve

Abstract

The invention relates to the technical field of short-pulse power supplies, in particular to a short-pulse high-repetition-frequency driving circuit and method suitable for a compact ring gas injection valve. According to the technical scheme, the circuit comprises a signal input module, a control module, a trigger signal module, a low-voltage power panel, a high-voltage power panel, a low-voltage driving switch tube and a high-voltage driving switch tube. The output end of the signal input module is connected to the input end of the control module; the first output end of the control module is connected to the input end of the low-voltage power panel and used for providing first reference voltage setting. Through time-sharing driving and digital accurate control, stable output of microsecond-level short pulses and high repetition frequency is achieved, meanwhile, the control precision and consistency of the gas injection time sequence and flow are remarkably improved, the thermal load of the system is effectively reduced, and therefore the driving reliability is enhanced; parameters can be flexibly adjusted, so that the scheme can widely meet the application requirements of different compact ring gas injection valves.

Description

Technical Field

[0001] This invention relates to the field of short pulse power supply technology, and in particular to a short pulse high repetition rate drive circuit and method suitable for compact ring gas injection valves. Background Technology

[0002] Compact ring injection technology is one of the key methods for achieving plasma core feeding in magnetic confinement fusion devices. This technology effectively increases the plasma density and fusion reaction efficiency inside the device by injecting high-speed, high-density plasma clusters into the vacuum chamber. In this process, the performance of the gas injection valve, as the gas injection actuator, is crucial. The gas injection valve needs to open and close rapidly and precisely within an extremely short time (typically on the order of microseconds) to release a set amount of gas; simultaneously, to meet the requirements of continuous feeding and experimental sequences, the drive system must be able to operate stably and reliably at high repetition rates, ensuring accurate particle counts and controllable timing for each injection.

[0003] Currently, common power supply solutions for driving such gas injection valves are mostly based on traditional RC charging and discharging circuits or LC resonant circuits. However, these traditional solutions reveal significant technical limitations and contradictions when applied to the demanding operating conditions of short pulses and high repetition rates.

[0004] The conflict between pulse width and repetition frequency: When it is necessary to compress the drive pulse to the microsecond level to match the physical requirement of rapid valve opening, the charging and discharging time constant of the energy storage element (capacitor or inductor) becomes a bottleneck. Shortening the pulse width often requires reducing energy storage or increasing the discharge rate, but this will result in the circuit requiring a longer energy recovery (charging) time after a single pulse, making it difficult to achieve continuous operation at a high repetition frequency.

[0005] Device stress and system reliability issues: Under narrow pulse conditions, switching devices (such as thyristors and MOSFETs) need to withstand extremely high transient current (di / dt) and voltage (dv / dt) stresses. This not only places stringent demands on the performance of the devices themselves but also increases the risk of circuit failure. Simultaneously, frequent rapid switching generates significant switching losses, leading to severe system overheating.

[0006] Challenges to control accuracy and consistency: The pulse waveform parameters (such as amplitude and pulse width) of traditional circuits are easily affected by component parameter drift, temperature changes and power supply fluctuations. When pursuing high repetition rate operation, it is difficult to ensure the consistency between pulses (i.e., low jitter), which affects the accuracy and repeatability of gas injection control.

[0007] In summary, existing RC or LC-based drive technologies struggle to achieve a balance between the two core performance indicators of "microsecond-level short pulses" and "high repetition rate," becoming a technical bottleneck restricting the high-performance and high-reliability operation of compact ring gas injection valves. Therefore, there is an urgent need to develop a novel drive method and dedicated circuit that can achieve stable drive with high repetition rate, low jitter, and high efficiency without sacrificing pulse quality, to meet the stringent requirements of advanced magnetic confinement fusion devices for their feeding systems. Therefore, this application proposes a short-pulse high-repetition-rate drive circuit and method suitable for compact ring gas injection valves. Summary of the Invention

[0008] The purpose of this invention is to address the fact that existing RC or LC-based drive technologies in the background art have difficulty in achieving a balance between the two core indicators of "microsecond-level short pulses" and "high repetition frequency," which has become a technical bottleneck restricting the high-performance and high-reliability operation of compact ring steam injection valves. This invention proposes a short-pulse high-repetition-frequency drive circuit and method suitable for compact ring steam injection valves.

[0009] In a first aspect, this application provides a short-pulse high-repetition-rate drive circuit suitable for a compact ring injection valve, comprising:

[0010] Signal input module, control module, trigger signal module, low-voltage power supply board, high-voltage power supply board, low-voltage drive switch and high-voltage drive switch;

[0011] The output terminal of the signal input module is connected to the input terminal of the control module;

[0012] The first output terminal of the control module is connected to the input terminal of the low-voltage power supply board to provide a reference voltage setting.

[0013] The second output terminal of the control module is connected to the input terminal of the high-voltage power supply board to provide a reference voltage setting.

[0014] The third output terminal of the control module is connected to the input terminal of the trigger signal module to provide trigger settings;

[0015] The first output terminal of the trigger signal module generates timing control one and is connected to the control terminal of the high-voltage drive switch tube;

[0016] The second output terminal of the trigger signal module generates timing control two and is connected to the control terminal of the low-voltage drive switch.

[0017] The output terminal of the low-voltage power supply board is connected to the power input terminal of the low-voltage drive switch tube;

[0018] The output terminal of the high-voltage power supply board is connected to the power input terminal of the high-voltage drive switch tube;

[0019] The output terminal of the low-voltage drive switch is connected in parallel with the output terminal of the high-voltage drive switch, and they are both connected to the drive terminal of the air valve.

[0020] Optionally, the control module is used for:

[0021] Receive digital parameters from the signal input module;

[0022] The digital parameters are converted into reference voltage setting one and reference voltage setting two, and output to the low-voltage power supply board and the high-voltage power supply board respectively to control the charging voltage of their energy storage capacitors;

[0023] The trigger parameters are output to the trigger signal module as the trigger settings.

[0024] Optionally, the trigger signal module is used for:

[0025] Receive the trigger settings;

[0026] In response to the trigger setting, timing control one and timing control two, which have adjustable frequencies and are synchronized with each other, are generated;

[0027] The timing control two has a settable delay time relative to the timing control one.

[0028] Optionally, the timing control is a pulse width modulation signal having a first adjustable pulse width;

[0029] The timing control two is a pulse width modulation signal with a second adjustable pulse width;

[0030] The first adjustable pulse width ranges from 0.1 μs to 300 μs, and the second adjustable pulse width ranges from 0.1 ms to 10 ms.

[0031] Optionally, the repetition frequency of both timing control one and timing control two can be adjusted within a range of 0.1Hz to 100Hz;

[0032] The adjustable delay time of the second timing control relative to the first timing control is 0μs to 300μs.

[0033] Optionally, the high-voltage power supply board is used to provide a discharge voltage with an adjustable amplitude in the range of 10V to 400V;

[0034] The low-voltage power supply board is configured to provide a discharge voltage with an adjustable amplitude in the range of 1V to 40V.

[0035] Optionally, both the low-voltage power board and the high-voltage power board include an energy storage capacitor, a charging current limiting resistor, and a discharge resistor connected in parallel with the energy storage capacitor.

[0036] Arc suppression or spike absorption circuits are connected between the power output terminals of the low-voltage drive switch and the high-voltage drive switch and the drive terminal of the gas injection valve.

[0037] Optionally, the control module includes a digital-to-analog conversion unit and a signal conditioning unit;

[0038] The digital-to-analog converter unit is used to convert digital control words into preliminary analog voltages;

[0039] The signal conditioning unit includes an operational amplifier and an external resistor-capacitor network, used to filter, amplify and buffer the preliminary analog voltage to generate stable reference voltage setting one and reference voltage setting two.

[0040] Secondly, this application provides a short-pulse high-repetition-frequency driving method for a compact ring steam injection valve based on the driving circuit described in the first aspect, comprising the following steps:

[0041] S1. Set the target discharge parameters through the signal input module. The target discharge parameters include high voltage amplitude, low voltage amplitude, pulse frequency, high voltage pulse width, low voltage pulse width, and low voltage delay time.

[0042] S2. The control module receives the target discharge parameters and generates the reference voltage setting one, the reference voltage setting two, and the trigger setting accordingly.

[0043] S3. The low-voltage power supply board and the high-voltage power supply board charge their internal energy storage capacitors according to the reference voltage setting one and the reference voltage setting two, respectively.

[0044] S4. The trigger signal module generates synchronous timing control one and timing control two with a set delay according to the trigger setting;

[0045] S5. During the effective level of the timing control one, drive the high-voltage drive switch to turn on, so that the high-voltage power supply board releases a high-voltage short pulse to the gas injection valve to quickly open the valve;

[0046] S6. During the effective level of the timing control two, drive the low-voltage drive switch to turn on, so that the low-voltage power supply board provides a low-voltage sustaining current to the gas injection valve to keep the valve open and control the gas flow.

[0047] Optionally, in steps S5 and S6, the pulse width of the high-pressure short pulse is smaller than the pulse width of the low-pressure sustaining current, and the low-pressure sustaining current is provided after the high-pressure short pulse ends, so as to precisely control the single injection volume of the gas injection valve by the duration and amplitude of the low-pressure sustaining current.

[0048] Compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0049] This invention enables the high-voltage power board to output fast turn-on pulses with pulse widths as low as microseconds through independent programmable reference voltage settings and synchronous PWM signal control. At the same time, the independent energy storage and charging paths of the low-voltage power board and the high-voltage power board ensure that the system can still work stably at high repetition frequencies (up to 100Hz), thus solving the contradiction of limited repetition frequency of traditional RC / LC circuits under narrow pulse widths.

[0050] The control module employs digital-to-analog conversion and signal conditioning technology to achieve precise digital setting of high and low voltage discharge amplitudes. The trigger signal module generates two synchronous and delayed drive signals with independently adjustable pulse widths, enabling precise control of the gas injection valve opening sequence, opening force, and holding time, ensuring consistency between pulses and repeatability of the gas injection volume.

[0051] A time-division multiplexing strategy is adopted, which involves "rapid opening with a short high-voltage pulse and maintaining conduction with a long low-voltage pulse." The high-voltage pulse is applied for only a very short time, significantly reducing the continuous Joule heating caused by high-voltage drive. During the low-pressure maintenance phase, a lower voltage is used to keep the valve open, significantly reducing the overall thermal load on the valve and drive circuit, thereby extending the valve's lifespan and improving the long-term reliability of the system.

[0052] Through the signal input module, users can flexibly set key parameters such as voltage amplitude, pulse width, frequency, and delay. This fully digital parameter configuration method enables the same drive circuit to be quickly adapted to different models or operating requirements of compact ring gas injection valves, improving the system's versatility and experimental flexibility.

[0053] In summary, this invention, through time-sharing drive and precise digital control, achieves stable output of microsecond-level short pulses and high repetition frequency while significantly improving the control accuracy and consistency of gas injection timing and flow rate, and effectively reduces the system's thermal load, thereby enhancing drive reliability. The parameters can be flexibly adjusted, making this solution widely adaptable to different compact ring steam injection valve application requirements. Attached Figure Description

[0054] Figure 1 This is a block diagram of a short-pulse high-repetition-rate drive circuit suitable for a compact ring injection valve;

[0055] Figure 2 This is a schematic diagram of the control module.

[0056] Figure 3 A schematic diagram for setting the reference voltage;

[0057] Figure 4 A schematic diagram for setting up a timing circuit.

[0058] Figure 5 This is a schematic diagram of the discharge circuit for the high-voltage power supply board and the low-voltage power supply board.

[0059] Figure label:

[0060] 100. Signal input module;

[0061] 200. Control module;

[0062] 201. Reference Voltage Setting 1;

[0063] 202. Reference Voltage Setting Two;

[0064] 203. Trigger settings;

[0065] 300. Low-voltage power supply board;

[0066] 400. High-voltage power supply board;

[0067] 500. Trigger signal module;

[0068] 501. Timing Control 1;

[0069] 502. Timing Control II;

[0070] 600. Low-voltage drive switching transistor;

[0071] 700. High-voltage drive switching transistor;

[0072] U1, Digital-to-Analog Converter;

[0073] N4, N5: Gate driver chips;

[0074] V10, power switching transistor;

[0075] R11, R12, R13, R32, R39, R43, R49: Resistors;

[0076] C12, C13, C14, C16, C17, C18, C27, C33: Capacitors;

[0077] RP1, RP2: Adjustable resistors. Detailed Implementation

[0078] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0079] Example: The present invention proposes a short-pulse high-repetition-rate drive circuit suitable for compact ring gas injection valves, such as... Figure 1 As shown, the valve drive circuit provided in this example includes: a signal input module 100, a control module 200, a low-voltage power supply board 300, a high-voltage power supply board 400, a trigger signal module 500, a low-voltage drive switch 600, and a high-voltage drive switch 700. The output terminal of the signal input module 100 is connected to the input terminal of the control module 200. The first output terminal of the control module 200 is connected to the input terminal of the low-voltage power supply board 300. The second output terminal of the control module 200 is connected to the input terminal of the high-voltage power supply board 400. The third output terminal of the control module 200 is connected to the input terminal of the trigger signal module 500. The output terminal of the low-voltage power supply board 300 is connected to the first input terminal of the low-voltage drive switch 600. The output terminal of the high-voltage power supply board 400 is connected to the first input terminal of the high-voltage drive switch 700. The first output terminal of the trigger signal module 500 is connected to the second input terminal of the low-voltage drive switch 600. The second output terminal of the trigger signal module 500 is connected to the second input terminal of the high-voltage drive switch 700. The output terminals of the low-voltage drive switch 600 and the high-voltage drive switch 700 are connected in parallel and then connected to the valve control terminal. The valve control terminal is the valve conducting element; applying a voltage greater than the valve conduction requirement to it will cause the valve to conduct and maintain the conduction for a set time. The drive circuit provided in this example uses DC voltage combined with a pulse width modulation signal to perform short-pulse repetition frequency discharge, solving the problem that the high repetition frequency cannot be maintained when generating short pulses, resulting in sluggish valve response and insufficient control accuracy, which in turn limits the dynamic performance and operational reliability of the valve. By optimizing the circuit structure, a high-frequency, stable pulse sequence output is achieved while ensuring precise adjustment of the pulse width, thereby improving the response speed and control accuracy of the air injection valve.

[0080] In the initial operating state of the power supply, such as Figure 1As shown, the signal input module 100 sets the required discharge parameters through the display screen and sends a digital signal to the control module 200. The control module performs analog-to-digital conversion and amplification on the digital signal and outputs reference voltage setting one 201 and reference voltage setting two 202. After receiving reference voltage setting one 201, the low-voltage power supply board 300 charges the capacitor on the board. After charging, the voltage is located at the collector of the low-voltage drive switch 600. After receiving reference voltage setting two 201, the high-voltage power supply board 400 charges the capacitor on the board. After charging, the voltage is located at the collector of the high-voltage drive switch 700. Subsequently, the control module 200 sends trigger setting 203 to the trigger signal module 500. Through the timing control one 501 and the timing control two 502 at the first output terminal of the trigger signal module 500, pulse width modulation signals are output to the low-voltage drive switch and the high-voltage drive switch respectively to turn on the gas valve to discharge and realize the gas valve opening to realize the gas injection process.

[0081] Reference Figure 2 The schematic diagram of the control module shown indicates that the control module can be selected from a Field Programmable Gate Array (FPGA) logic control chip or a microcontroller control chip. The signal input module 100 can be set with the display screen and the input parameters are transmitted to the control module 200 via electrical signals. Alternatively, it can be connected to the host computer software via a network cable to set the input parameters, which are then converted into electrical signals by an optocoupler and transmitted to the control module 200, and then to the low-voltage power supply board 300, the high-voltage power supply board 400, and the trigger signal module 500.

[0082] As attached Figure 3As shown, the reference voltage setting circuit of this embodiment mainly includes: a power supply module, a digital control interface module, a digital-to-analog converter (DAC) module, and two symmetrical analog signal conditioning and output modules. The digital control interface module includes a serial peripheral interface (SPI2) communication line, specifically including a serial clock line SPI2_SCK and a serial data line SPI2_MOSI, used to connect to an external microcontroller. The core of the DAC module is a dual-channel 12-bit digital-to-analog converter U1. The core of the two analog signal conditioning and output modules is a high-precision, low-noise operational amplifier, supplemented by corresponding resistor and capacitor networks to form filtering, amplification, and buffering circuits. The generation of the reference voltage setting is completed sequentially by the first channel, the first filter network, and the first operational amplifier conditioning channel of the DAC U1. First, the control module sends a digital control word corresponding to the first voltage setting value to the DAC U1 via the SPI2 bus. After receiving and parsing the control word, the U1 generates a preliminary analog voltage DAOUT1 in its internal first channel DAC unit. The DAOUT1 signal then enters the first passive low-pass filter network consisting of resistor R13 and capacitor C12. This RC network attenuates high-frequency quantization noise and switching noise in the DAC output, smoothing the output voltage waveform. The filtered signal is then sent to the first operational amplifier conditioning channel. This channel is centered around an operational amplifier, whose non-inverting input receives the filtered signal. This operational amplifier is configured with a specific negative feedback network, including resistor RP1. The reference voltage setting is adjusted via RP1 to stabilize the output. This configuration allows the circuit to achieve signal buffering and necessary gain adjustment while providing low output impedance. After further filtering of high-frequency interference by decoupling capacitor C13, the output of the operational amplifier is finally a stable and accurate voltage signal. The generation of the second reference voltage setting is independently completed by the second channel, the second filter network, and the second operational amplifier conditioning channel of the digital-to-analog converter U1, and its principle is symmetrical to that of the first channel. The control module sends a digital control word corresponding to the second voltage setting value to the digital-to-analog converter U1 via the same SPI2 bus. The second channel inside U1 generates the initial analog voltage DAOUT2 accordingly. The DAOUT2 signal then enters the first passive low-pass filter network consisting of resistor R23 and capacitor C15. This RC network attenuates high-frequency quantization noise and switching noise in the DAC output, smoothing the output voltage waveform. The filtered signal is then sent to the first operational amplifier conditioning channel. This channel is centered around an operational amplifier whose non-inverting input receives the filtered signal. This op-amp is configured with a specific negative feedback network, including resistor RP2, through which the reference voltage setting is adjusted to stabilize the output. This configuration allows this stage of the circuit to achieve signal buffering and necessary gain adjustment, while providing low output impedance.After the high-frequency interference is further filtered out by the decoupling capacitor C17, the output of the operational amplifier is finally a stable and accurate voltage signal.

[0083] The working process of this embodiment of the invention is as follows: After the system is powered on, the control module sets the digitized code values ​​of the two channels inside the digital-to-analog converter U1 through the SPI2 interface; U1 synchronously or sequentially converts these two digitized code values ​​into two preliminary analog voltages; each analog voltage first passes through a first-order RC low-pass filter for preliminary smoothing filtering; subsequently, each signal enters its own independent high-performance operational amplifier conditioning channel for buffering, gain adjustment, and further active filtering, thereby significantly improving the signal's driving capability, stability, and accuracy; finally, the two conditioned signals are output as reference voltage setting one and reference voltage setting two. Through the above mixed-signal circuit architecture, independent, precise, and programmable setting of the two voltages is achieved.

[0084] The following is in conjunction with the appendix Figure 4The specific implementation of the dual-channel PWM signal driving circuit of the present invention is described in detail. This embodiment provides a signal conversion scheme based on a dedicated driver chip, which can independently convert two pulse width modulation input signals into two electrical signal outputs with strong driving capability and electrical isolation. As shown in the accompanying drawings, the circuit system of this embodiment mainly includes: two completely symmetrical and independent signal processing channels, a power supply module, and an output interface module. The core of each signal processing channel is a dedicated gate driver chip. In this embodiment, a dual-channel high-speed gate driver is preferred, which contains two independent driving channels in a single chip. For clarity, they are labeled N4 and N5 in the figure, and each chip uses only one driving channel in this embodiment. The input signals are two PWM digital signals, and the outputs are two driven electrical signals led out through an SMA connector. The generation of the first electrical signal is completed by the sequential cooperation of the first input conditioning network, the first driver chip N4, and the first output network. First, the first PWM input signal is introduced into the circuit through the current limiting resistor R39. Subsequently, the PWM signal is connected to the non-inverting input terminal IN+ of the third pin of the driver chip N4. The second pin of chip N4, the inverting input IN-, is directly grounded and configured for non-inverting amplification mode. The chip's power supply pin is connected to a +15V operating voltage, and the ground pin is reliably grounded. Internally, driver chip N4 amplifies and drives the input signal, generating a switching signal from its fifth pin, OUT, that is in phase with the input PWM1 signal but has significantly enhanced driving capability. This output signal passes through an output current-limiting resistor R32 and is connected to a standard SMA connector as an independent timing signal output. To ensure stable operation of the driver chip, a power decoupling capacitor C27 is placed near the chip's power supply pin and ground to filter noise on the power line, provide instantaneous current to the chip, and ensure its high-speed switching performance. The generation path of the second signal is completely symmetrical and independent of the first, consisting of a second input conditioning network, a second driver chip N5, and a second output network. The second input signal PWM2 is introduced through a current-limiting resistor R49 and then connected to the third pin of driver chip N5, the non-inverting input IN+. The connection methods for the power supply, ground, and inverting input of chip N5 are the same as those for N4. After amplifying its input signal, chip N5 outputs the enhanced electrical signal from its fifth pin, OUT. This signal, after passing through the output current-limiting resistor R43, is connected to an SMA connector as an independent timing signal output. To ensure stable operation of the driver chip, a power decoupling capacitor C33 is placed near the power supply pin and ground to filter out noise on the power line, provide instantaneous current to the chip, and ensure its high-speed switching performance.

[0085] The working process of this invention is as follows: Two independent PWM input signals are filtered and shaped by the RC input network of their respective channels; the processed signals are sent to the non-inverting input terminals of two dedicated driver chips N4 and N5; each driver chip amplifies and levels the input PWM signals to generate a switching drive signal with strong current pulling and sinking capabilities; this drive signal is then led out through a standard SMA connector after passing through a current-limiting resistor connected in series at the output terminal. Thus, the two PWM digital inputs are efficiently, reliably, and electrically isolated and converted into two electrical signals that can directly drive subsequent power devices or be transmitted. The two channels have symmetrical structures, identical parameters, and can operate independently without interference.

[0086] The following is in conjunction with the appendix Figure 5 The specific implementation of the pulse power supply discharge circuit of the present invention is described in detail. Both the low-voltage power board and the high-voltage power board discharge circuits are this discharge circuit. This embodiment provides a pulse discharge scheme based on power switch control, which can rapidly release the electrical energy stored in the energy storage capacitor through a specific circuit under the control of an external pulse signal, forming a high-voltage pulse output. As shown in the accompanying drawings, the pulse discharge circuit of this embodiment mainly includes: a high-voltage DC input interface, an energy storage module, a switch control module, and a pulse output interface. Electrical energy charges the energy storage capacitors C14 and C16 after passing through the current-limiting resistor R11. Simultaneously, the high-resistance discharge resistors R12 and R13 connected in parallel across capacitors C14 and C16 form a static discharge path, which slowly releases the residual charge on capacitors C14 and C16 when there is no discharge operation, ensuring circuit safety. The discharge action is triggered by a pulse signal sent by an external controller. This pulse signal is applied between the gate and source of V10. When the pulse signal is high, the gate-source voltage of V10 exceeds its turn-on threshold, causing V10 to rapidly switch from the off state to the fully on state. Its drain and source exhibit extremely low on-resistance, and the energy stored in energy storage capacitors C14 and C16 is quickly released through the gas valve via the main discharge circuit. To ensure the reliability and stability of the discharge process, multiple auxiliary networks are incorporated into the circuit. A filter capacitor C18 is connected in parallel with the drain of the switching transistor to absorb high-frequency interference introduced by the power line. Near the drain of the switching transistor V10, an RC snubber circuit composed of resistors and capacitors is installed to absorb voltage spikes generated by stray inductance when V10 is turned off.

[0087] The pulse discharge circuit of this invention operates as follows: First, an external high-voltage DC power supply charges energy storage capacitors C14 and C16 to a set voltage through a current-limiting resistor R11. When a discharge pulse is needed, the trigger signal module sends a pulse width modulation signal to the gate of power switch V10. V10 is immediately turned on, instantly connecting the energy stored in the charged energy storage capacitors into the discharge circuit composed of an air valve and an internal current-limiting network. The energy stored in the capacitors is rapidly released through this circuit, thereby generating a high-intensity, short-duration current pulse at the output terminal. After the pulse ends, the control signal goes low, V10 is reliably turned off, the discharge process terminates, and the circuit re-enters the energy storage preparation state. By adjusting the input voltage, the timing of the control signal, and the pulse width, flexible control of the output pulse energy and frequency can be achieved. The discharge between the high-voltage power board and the low-voltage power board is delayed through timing control. After the high-voltage discharge, the low-pressure solenoid valve is kept open, which can effectively prevent the structural heating problem caused by high-voltage drive, avoid the valve from overheating, and ensure that the valve can stably intake air for a long time under low pressure. This improves efficiency and extends the valve's life.

[0088] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A short-pulse high-repetition-rate drive circuit suitable for a compact ring gas injection valve, characterized in that, include: Signal input module (100), control module (200), trigger signal module (500), low voltage power supply board (300), high voltage power supply board (400), low voltage drive switch (600) and high voltage drive switch (700). The output terminal of the signal input module (100) is connected to the input terminal of the control module (200); The first output terminal of the control module (200) is connected to the input terminal of the low-voltage power supply board (300) to provide a reference voltage setting (201). The second output terminal of the control module (200) is connected to the input terminal of the high voltage power board (400) to provide a reference voltage setting (202). The third output terminal of the control module (200) is connected to the input terminal of the trigger signal module (500) to provide trigger settings (203). The first output terminal of the trigger signal module (500) generates timing control one (501) and is connected to the control terminal of the high voltage drive switch (700); The second output terminal of the trigger signal module (500) generates timing control two (502) and is connected to the control terminal of the low-voltage drive switch (600); The output terminal of the low-voltage power supply board (300) is connected to the power input terminal of the low-voltage drive switch (600); The output terminal of the high-voltage power supply board (400) is connected to the power input terminal of the high-voltage drive switch (700); The output terminal of the low-voltage drive switch (600) is connected in parallel with the output terminal of the high-voltage drive switch (700), and they are both connected to the drive terminal of the air valve.

2. The short-pulse high-repetition-rate drive circuit suitable for a compact ring gas injection valve according to claim 1, characterized in that, The control module (200) is used for: Receive digital parameters from the signal input module (100); The digital parameters are converted into reference voltage setting one (201) and reference voltage setting two (202), and output to the low-voltage power supply board (300) and the high-voltage power supply board (400) respectively to control the charging voltage of their energy storage capacitors; The trigger parameters are output as the trigger settings (203) to the trigger signal module (500).

3. The short-pulse high-repetition-rate drive circuit suitable for a compact ring gas injection valve according to claim 1, characterized in that, The trigger signal module (500) is used for: Receive the trigger settings (203); In response to the trigger setting (203), timing control one (501) and timing control two (502) with adjustable frequencies and synchronized with each other are generated. The timing control two (502) has a settable delay time relative to the timing control one (501).

4. The short-pulse high-repetition-rate drive circuit suitable for a compact ring gas injection valve according to claim 3, characterized in that, The timing control one (501) is a pulse width modulation signal with a first adjustable pulse width; The timing control two (502) is a pulse width modulation signal with a second adjustable pulse width; The first adjustable pulse width ranges from 0.1 μs to 300 μs, and the second adjustable pulse width ranges from 0.1 ms to 10 ms.

5. A short-pulse high-repetition-rate drive circuit suitable for a compact ring gas injection valve according to claim 4, characterized in that, The repetition frequency of both timing control one (501) and timing control two (502) is adjustable from 0.1Hz to 100Hz. The delay time of the second timing control (502) relative to the first timing control (501) is adjustable in the range of 0μs to 300μs.

6. A short-pulse high-repetition-rate drive circuit suitable for a compact ring gas injection valve according to claim 1, characterized in that, The high-voltage power supply board (400) is used to provide a discharge voltage with an adjustable amplitude in the range of 10V to 400V; The low-voltage power supply board (300) is configured to provide a discharge voltage with an adjustable amplitude in the range of 1V to 40V.

7. A short-pulse high-repetition-rate drive circuit suitable for a compact ring gas injection valve according to claim 1, characterized in that, Both the low-voltage power board (300) and the high-voltage power board (400) include an energy storage capacitor, a charging current limiting resistor, and a discharge resistor connected in parallel with the energy storage capacitor. Arc suppression or spike absorption circuits are connected between the power output terminals of the low-voltage drive switch (600) and the high-voltage drive switch (700) and the drive terminal of the gas injection valve.

8. A short-pulse high-repetition-rate drive circuit suitable for a compact ring gas injection valve according to claim 1, characterized in that, The control module (200) includes a digital-to-analog conversion unit and a signal conditioning unit; The digital-to-analog converter unit is used to convert digital control words into preliminary analog voltages; The signal conditioning unit includes an operational amplifier and an external resistor-capacitor network, used to filter, amplify and buffer the preliminary analog voltage to generate a stable reference voltage setting one (201) and reference voltage setting two (202).

9. A short-pulse high-repetition-rate driving method for a compact ring gas injection valve based on the driving circuit described in any one of claims 1-8, characterized in that, Includes the following steps: S1. Set the target discharge parameters through the signal input module (100). The target discharge parameters include high voltage amplitude, low voltage amplitude, pulse frequency, high voltage pulse width, low voltage pulse width and low voltage delay time. S2. The control module (200) receives the target discharge parameters and generates the reference voltage setting one (201), the reference voltage setting two (202), and the trigger setting (203) accordingly. S3. The low-voltage power supply board (300) and the high-voltage power supply board (400) charge their internal energy storage capacitors according to the reference voltage setting one (201) and the reference voltage setting two (202), respectively. S4. The trigger signal module (500) generates synchronous timing control one (501) and timing control two (502) with a set delay according to the trigger setting (203). S5. During the effective level of the timing control one (501), drive the high-voltage drive switch (700) to turn on, so that the high-voltage power supply board (400) releases a high-voltage short pulse to the gas injection valve to quickly open the valve; S6. During the effective level of the timing control two (502), the low-voltage drive switch (600) is driven to turn on, so that the low-voltage power supply board (300) provides a low-voltage sustaining current to the gas injection valve to keep the valve open and control the gas flow.

10. A short-pulse high-repetition-rate driving method for a compact ring gas injection valve according to claim 9, characterized in that, In steps S5 and S6, the pulse width of the high-pressure short pulse is smaller than the pulse width of the low-pressure sustaining current, and the low-pressure sustaining current is provided after the high-pressure short pulse ends. The single injection volume of the gas injection valve is precisely controlled by the duration and amplitude of the low-pressure sustaining current.

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