A plasma ignition actuator with adaptive flame regulation function

Abstract

The present invention proposes a plasma ignition exciter with an adaptive flame adjustment function. The temperature monitor and the pressure monitor are set to monitor the working conditions of different temperature and different air pressure environments, and the environmental controller and the inverter controller are set to adjust the working state according to different working environments. The current controller is used to increase the input current, and the discharge controller is used to increase the discharge frequency to increase the output power, increase the plasma flame, and improve the ignition ability of the ignition exciter. This solves the problem that the traditional ignition exciter has a single output state during use and cannot meet the higher demand for ignition ability under harsh environmental conditions. It not only helps to improve the intelligence level of the ignition exciter, but also helps to improve the working stability and ignition ability of the engine in harsh environments.

Description

Technical Field

[0001] The present invention relates to the technical field of ignition devices in the aviation industry, and in particular to a plasma ignition exciter with an adaptive flame regulation function. Background Art

[0002] Currently, common plasma ignition exciters generally consist of an inverter circuit, a rectifier circuit, an energy storage circuit, and a discharge switching device. Patent application number 95225655.X, titled "High-Energy Ignition Device," is filed in China. The device includes a power supply, a transformer, a rectifier circuit, an energy storage circuit, a pulse triggering device, a discharge tube, and a spark plug. The power supply is boosted and rectified by the transformer, then charged into an energy storage capacitor. When the voltage on the energy storage capacitor reaches the breakdown voltage of the discharge tube, the discharge tube breaks down and conducts. The voltage on the energy storage capacitor is applied to the triggering device, generating a high-voltage pulse that breaks down the discharge tube and spark plug. The energy storage capacitor then discharges through the discharge tube to the spark plug, forming an electric spark.

[0003] This type of ignition exciter can only achieve a single state output, cannot check and feedback its own state, and is even more unable to adaptively adjust to the harsh operating conditions of the engine, such as low temperature, high altitude and low air pressure, that is, to increase the output power to increase the plasma flame to meet the engine's higher requirements for ignition capability under harsh conditions.

[0004] At present, the working environment of aircraft engines is becoming more and more complex. The ignition exciter cannot adaptively adjust the output state according to environmental changes. Not only is there a problem of insufficient intelligence, but there are also problems with insufficient working stability and ignition capability of the engine in harsh environments. Summary of the Invention

[0005] In response to the problem that the ignition exciter in the prior art cannot perform adaptive adjustment for harsh engine operating conditions, such as low temperature, high altitude and low air pressure, the present invention proposes a plasma ignition exciter with adaptive flame adjustment function. The device monitors working conditions of different temperatures and different air pressure environments by setting a temperature monitor and a pressure monitor, and adjusts its own working state according to different working environments by setting an environmental controller and an inverter controller. The device increases the input current through a current controller, and increases the discharge frequency through a discharge controller to increase the output power and increase the plasma flame, thereby improving the ignition capability of the ignition exciter. This solves the problem that traditional ignition exciters have a single output state during use and cannot meet the higher demand for ignition capability under harsh environmental conditions.

[0006] The present invention realizes the following contents:

[0007] A plasma ignition exciter with an adaptive flame regulation function includes a temperature monitor, a pressure monitor, an environment controller, an inverter controller, a current controller, a discharge controller, and an OR gate circuit;

[0008] The environmental controller is connected to the temperature monitor and the pressure monitor respectively through an OR gate circuit, and is used to convert the temperature signal obtained from the temperature monitor or the pressure signal obtained from the pressure monitor into a frequency control signal and a current control signal;

[0009] The inverter controller is connected to the environmental controller, the discharge controller, and the current controller, and is used to output the frequency control signal obtained from the environmental controller to the discharge controller, control the discharge frequency by controlling the on and off of the discharge controller, and output the current control signal obtained from the environmental controller to the current controller, and control the input current by controlling the on and off of the current controller.

[0010] In order to better implement the present invention, further, the plasma ignition exciter with adaptive flame regulation function further includes a feedback monitor;

[0011] The feedback monitor is connected to the environmental controller and the discharge controller, and is used to convert the voltage signal obtained from the discharge controller into a current signal and feed it back to the environmental controller. The environmental controller converts the current signal received from the feedback monitor into a frequency control signal and outputs it to the discharge controller to control the discharge frequency of the discharge controller.

[0012] In order to better implement the present invention, further, the environmental controller includes a control chip U1A;

[0013] Pin 14 of the control chip U1A is connected to the temperature monitor via an AND gate circuit, pin 1 is connected to the pressure controller via an AND gate circuit, pin 3 is connected to the feedback monitor, pin 4 is connected to the discharge controller, and pin 13 is connected to the inverter controller.

[0014] In order to better implement the present invention, further, the inverter controller includes a PWN control chip;

[0015] Pin 4 of the PWN control chip is connected to pin 13 of the control chip U1A, and pins 3 and 6 are connected to the current controller.

[0016] In order to better implement the present invention, further, the current controller includes a transformer T1 and a MOS tube Q1;

[0017] One end of the transformer input terminal of the transformer T1 is connected to the power supply, and the other end is connected to the drain of the MOS tube Q1;

[0018] One end of the transformer output end of the transformer T1 is connected to the discharge controller, and the other end outputs the plasma flame;

[0019] The gate of the MOS transistor Q1 is connected to the pin 6 of the PWN control chip, and the source is connected to the pin 3 of the PWN control chip and the ground terminal.

[0020] In order to better implement the present invention, further, the current controller further includes a resistor R1;

[0021] One end of the resistor R1 is connected between the source of the MOS tube Q1 and the pin 3 of the PWN control chip, and the other end is connected to the ground, so as to collect the input current of the plasma ignition exciter.

[0022] In order to better implement the present invention, further, the discharge controller includes a transistor Q2, a diode D3, and a resistor R2;

[0023] One end of the transformer output terminal of the transformer T1 is connected to the collector of the transistor Q2, and the other end is connected to the output plasma flame through the diode D3;

[0024] The base of the transistor Q2 is connected to the pin 4 of the control chip U1A, and the emitter is connected to the pin 3 of the control chip U1A via the grounded resistor R2.

[0025] In order to better implement the present invention, further, the temperature monitor is a temperature sensor U3A, and the pressure monitor is a pressure sensor U4A.

[0026] The present invention has the following beneficial effects:

[0027] (1) The present invention utilizes a temperature monitor and a pressure monitor to monitor ambient temperature and pressure, respectively, enabling the engine ignition actuator to adaptively adjust the flame according to varying ambient temperatures or pressures, thereby enabling the ignition actuator to adaptively adjust to harsh environments such as high altitude and low temperatures. Furthermore, the present invention enables the ignition actuator to adaptively control the extent of plasma flame growth according to the severity of the operating environment, thereby further enhancing the ignition capability of aircraft engines under adverse operating conditions.

[0028] (2) The feedback monitor can monitor the size of the plasma flame in real time, and the current controller can monitor the size of the input current in real time, and can also indirectly reflect the size of the plasma flame. The feedback signal can comprehensively reflect the working status of the ignition exciter and feedback it to the environmental control circuit through the detection signal, which can realize closed-loop control of the working status of the ignition exciter, thereby further improving the working stability of the ignition exciter and improving the overall reliability of the engine.

[0029] (3) The present invention converts pressure and temperature into voltage signals and calibrates the magnitude of the voltage signals to correspond to the ambient temperature and altitude. Based on the magnitude of the voltage signals, the environmental control circuit outputs corresponding control signals to increase the discharge frequency and input current, thereby increasing the plasma flame. This invention not only helps to improve the intelligence of the ignition exciter, but also helps to improve the operating stability and ignition capability of the engine in harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a functional block diagram of the plasma ignition exciter proposed in the present invention;

[0031] Figure 2 This is a principle block diagram of a plasma ignition exciter proposed in an embodiment of the present invention;

[0032] Figure 3 This is a circuit diagram of the plasma ignition exciter proposed in the present invention. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It should be understood that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, and therefore should not be regarded as limiting the scope of protection. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without making creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0035] Example 1:

[0036] A plasma ignition actuator with adaptive flame regulation function, such as Figure 1 As shown, it includes a temperature monitor, a pressure monitor, an environmental controller, an inverter controller, a current controller, a discharge controller, and an OR gate circuit;

[0037] The environmental controller is connected to the temperature monitor and the pressure monitor respectively through an OR gate circuit, and is used to convert the temperature signal obtained from the temperature monitor or the pressure signal obtained from the pressure monitor into a frequency control signal and a current control signal;

[0038] The inverter controller is connected to the environmental controller, the discharge controller, and the current controller, and is used to output the frequency control signal obtained from the environmental controller to the discharge controller, control the discharge frequency by controlling the on and off of the discharge controller, and output the current control signal obtained from the environmental controller to the current controller, and control the input current by controlling the on and off of the current controller.

[0039] Working principle: This embodiment monitors working conditions of different temperatures and different air pressure environments by setting a temperature monitor and a pressure monitor, and adjusts its own working state according to different working environments by setting an environmental controller and an inverter controller, increases the input current by a current controller, and increases the discharge frequency by setting a discharge controller to increase the output power, increase the plasma flame, and improve the ignition capability of the ignition exciter, thereby solving the problem that the traditional ignition exciter has a single output state during use and cannot meet the higher demand for ignition capability under harsh environmental conditions.

[0040] Example 2:

[0041] This embodiment is based on the above embodiment 1. Figure 3 As shown, the specific structures of the temperature monitor, pressure monitor, environmental controller, inverter controller, current controller, discharge controller, or gate circuit are described.

[0042] Working Principle: The plasma ignition exciter with adaptive flame regulation function also includes a feedback monitor;

[0043] The feedback monitor is connected to the environmental controller and the discharge controller, and is used to convert the voltage signal obtained from the discharge controller into a current signal and feed it back to the environmental controller. The environmental controller converts the current signal received from the feedback monitor into a frequency control signal and outputs it to the discharge controller to control the discharge frequency of the discharge controller.

[0044] The environmental controller includes a control chip U1A;

[0045] Pin 14 of the control chip U1A is connected to the temperature monitor via an AND gate circuit, pin 1 is connected to the pressure controller via an AND gate circuit, pin 3 is connected to the feedback monitor, pin 4 is connected to the discharge controller, and pin 13 is connected to the inverter controller.

[0046] The inverter controller includes a PWN control chip;

[0047] Pin 4 of the PWN control chip is connected to pin 13 of the control chip U1A, and pins 3 and 6 are connected to the current controller.

[0048] The current controller includes a transformer T1 and a MOS tube Q1;

[0049] One end of the transformer input terminal of the transformer T1 is connected to the power supply, and the other end is connected to the drain of the MOS tube Q1;

[0050] One end of the transformer output end of the transformer T1 is connected to the discharge controller, and the other end outputs the plasma flame;

[0051] The gate of the transistor Q1 is connected to the pin 6 of the PWN control chip, and the source is connected to the pin 3 of the PWN control chip and the ground.

[0052] The current controller further includes a resistor R1;

[0053] One end of the resistor R1 is connected between the source of the MOS tube Q1 and the pin 3 of the PWN control chip, and the other end is connected to the ground, for collecting the input current of the plasma ignition exciter with adaptive flame regulation function.

[0054] The discharge controller includes a transistor Q2, a diode D3, and a resistor R2;

[0055] One end of the transformer output terminal of the transformer T1 is connected to the collector of the transistor Q2, and the other end is connected to the output plasma flame through the diode D3;

[0056] The base of the transistor Q2 is connected to the pin 4 of the control chip U1A, and the emitter is connected to the pin 3 of the control chip U1A via the grounded resistor R2.

[0057] The temperature monitor is a temperature sensor U3A, and the pressure monitor is a pressure sensor U4A.

[0058] The rest of this embodiment is the same as that of the above-mentioned embodiment 1, and therefore will not be described in detail.

[0059] Example 3:

[0060] This embodiment is based on any one of the above embodiments 1-2. Figure 2 、 Figure 3 As shown, the present invention is described in detail with a specific embodiment.

[0061] Working Principle: This embodiment addresses the shortcomings of existing technologies by providing a plasma ignition actuator capable of monitoring operating conditions at varying temperatures and pressures and adjusting its operating state accordingly. Specifically, it increases the incoming current and discharge frequency to boost output power, increasing the plasma flame and enhancing ignition capability. This invention addresses the problem of conventional technologies suffering from a single output state during use and failing to meet the demands for higher ignition capability in harsh environments.

[0062] This embodiment achieves its purpose by: a temperature monitoring circuit and a pressure monitoring circuit monitor the ambient temperature and pressure, respectively. When the temperature or pressure environmental condition exceeds a set value, the monitoring circuit generates an environmental monitoring control signal via an OR gate circuit, which then acts on the environmental control circuit. Because of the use of an OR gate circuit, the environmental monitoring control signal is output when either the pressure or temperature monitoring control signal exceeds the set value.

[0063] The environmental monitoring control signal acts on the environmental control circuit, which controls the output characteristics of the entire exciter by controlling the discharge switching frequency and total input current, thereby controlling the size of the exciter's output plasma flame. When the environmental monitoring control signal outputs different voltages, the environmental control circuit outputs different current control signals and frequency control signals based on the corresponding voltage values.

[0064] The frequency control signal is transmitted to the discharge control circuit, where it controls the discharge switch to control the discharge frequency. Simultaneously, it is fed back to the discharge control circuit via the feedback monitoring circuit, achieving closed-loop control. A current control signal is output to the current control circuit, which increases the input current by increasing the circuit on-time, thereby increasing the total power of the ignition exciter and ultimately boosting output power, thereby increasing the plasma flame. Furthermore, the current sampling signal from the sampling circuit is fed back to the current control circuit, achieving closed-loop control of maximum current.

[0065] like Figure 2As shown, this embodiment converts the ambient temperature into a temperature signal via a temperature sensor, and the ambient pressure into a pressure signal via a pressure sensor. Both signals are voltage signals. Different temperatures and pressures correspond to different voltage values, which are transmitted to the environmental control circuit. The environmental control circuit then outputs different current control signals and frequency control signals based on the temperature and pressure voltage values. When the temperature or pressure environmental conditions are normal, the environmental control circuit outputs a normal current control signal and a normal frequency control signal. When the temperature or pressure environmental conditions gradually deteriorate, such as when the temperature or pressure decreases, the temperature and pressure signals gradually decrease, and the environmental control circuit gradually increases the amplitude of the current control signal and the frequency of the frequency control signal. Therefore, as the working environment becomes more severe, the plasma flame output by the ignition exciter increases accordingly.

[0066] The plasma flame size is monitored in real time through the feedback monitoring circuit, and the signal is fed back to the environmental control circuit to ensure that the plasma flame reaches the set value of the corresponding environment.

[0067] The current control circuit monitors the input current in real time. When the environmental control circuit outputs a current control signal to the current control circuit, the current sampling signal from the sampling circuit is fed back to the current control circuit. This circuit increases the circuit's on-time, or duty cycle, to increase the input current, thereby increasing the total input power of the ignition actuator to ensure that the input current reaches the set value for the corresponding environment. Ultimately, this increases the output power, and therefore the plasma flame. This achieves closed-loop feedback control.

[0068] like Figure 3 As shown, chip U3A is a temperature sensor, which can be implemented using a temperature-sensitive sensing chip. U4A is a pressure sensor, a piezoresistive pressure sensor that directly converts temperature signals into voltage output. The sensor monitors the temperature and pressure in the working environment and converts them into corresponding voltage signals, which are transmitted to the central control chip U1A. U1A is a microprocessor chip that compares the input temperature and pressure signals with the preset input current and discharge frequency, and outputs corresponding current control and frequency control signals. This allows different control signals to be output for different temperatures and pressures, thereby outputting plasma flames of different sizes according to the severity of the working environment.

[0069] U1A is a microprocessor chip that outputs a frequency control signal through pin 4 and a current control signal through pin 13. When the operating environment becomes harsh, i.e., when the temperature and pressure decrease, the frequency control signal output from pin 4 increases the alternating frequency of the output signal, thereby increasing the switching frequency of high-power switching device Q2 and the discharge frequency. Simultaneously, the frequency control signal output from pin 13 acts on PWM chip U2, increasing its PWM duty cycle and the stop-inverting voltage at pin 3 of PWM chip U2. This raises the voltage threshold sampled by resistor R1, thereby increasing the current in the input circuit.

[0070] The resistor R1 is an input current detection resistor. When the sampled voltage of the resistor R1 reaches the voltage threshold of the pin 3 of the PWM chip U2, the PWM chip U2 stops outputting the inverter signal, thereby realizing the control of the input current.

[0071] Resistor R2 is the output sampling resistor. When a plasma flame forms in the output circuit, the voltage signal sampled across resistor R2 becomes the current signal in the discharge circuit, reflecting the size of the plasma flame. This signal is fed back to pin 3 of microprocessor U1A, enabling real-time monitoring of the plasma flame's size. This enables closed-loop control of the plasma flame and improves system stability.

[0072] The discharge switch device Q2 is an IGBT semiconductor switch device. The voltage signal output by pin 4 of the micro-processing chip U1A can control the on and off of the switch device Q2, thereby controlling the frequency of discharge.

[0073] When the working environment returns to normal conditions, the temperature sensor U3A and the pressure sensor U4A return to normal output signals, and the output of the micro-processing chip U1A also returns to normal levels. Then the current and discharge frequency of the entire circuit return to normal working conditions, that is, the output plasma flame returns to normal, thereby achieving the purpose of adaptive adjustment.

[0074] This embodiment can realize automatic adjustment of the plasma flame of the exciter by monitoring the working environment temperature and pressure: when the environment is bad, the output power is increased, that is, the plasma flame is increased, and when the environment returns to normal, the normal flame can be restored.

[0075] The rest of this embodiment is the same as any of the above embodiments 1-2, so it will not be repeated here.

[0076] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A plasma ignition actuator with adaptive flame regulation function, characterized in that: Including temperature monitor, pressure monitor, environment controller, inverter controller, current controller, discharge controller, or gate circuit; The environmental controller is connected to the temperature monitor and the pressure monitor respectively through an OR gate circuit, and is used to convert the temperature signal obtained from the temperature monitor or the pressure signal obtained from the pressure monitor into a frequency control signal and a current control signal; The inverter controller is connected to the environment controller, the discharge controller, and the current controller, and is used to output the frequency control signal obtained from the environment controller to the discharge controller, and control the magnitude of the discharge frequency by controlling the conduction and shutdown of the discharge controller, and output the current control signal obtained from the environment controller to the current controller, and control the magnitude of the input current by controlling the shutdown and conduction of the current controller; Also included is a feedback monitor; The feedback monitor is connected to the environmental controller and the discharge controller, and is used to convert the voltage signal obtained from the discharge controller into a current signal and feed it back to the environmental controller. The environmental controller converts the current signal received from the feedback monitor into a frequency control signal and outputs it to the discharge controller to control the discharge frequency of the discharge controller. The environmental controller includes a control chip U1A; Pin 14 of the control chip U1A is connected to the temperature monitor via an AND gate circuit, pin 1 is connected to the pressure controller via an AND gate circuit, pin 3 is connected to the feedback monitor, pin 4 is connected to the discharge controller, and pin 13 is connected to the inverter controller; Characterized in that, the inverter controller includes a PWN control chip; Pin 4 of the PWN control chip is connected to pin 13 of the control chip U1A, and pins 3 and 6 are connected to the current controller; The current controller includes a transformer T1 and a MOS tube Q1; One end of the transformer input terminal of the transformer T1 is connected to the power supply, and the other end is connected to the drain of the MOS tube Q1; One end of the transformer output end of the transformer T1 is connected to the discharge controller, and the other end outputs the plasma flame; The gate of the MOS transistor Q1 is connected to the pin 6 of the PWN control chip, and the source is connected to the pin 3 of the PWN control chip and the ground terminal.

2. A plasma ignition actuator with adaptive flame regulation function as claimed in claim 1, characterized in that: The current controller further includes a resistor R1; One end of the resistor R1 is connected between the source of the MOS tube Q1 and the pin 3 of the PWN control chip, and the other end is connected to the ground, for collecting the input current of the plasma ignition exciter.

3. The plasma ignition actuator with adaptive flame regulation function according to claim 1, characterized in that: The discharge controller includes a transistor Q2, a diode D3, and a resistor R2; One end of the transformer output terminal of the transformer T1 is connected to the collector of the transistor Q2, and the other end is connected to the output plasma flame through the diode D3; The base of the transistor Q2 is connected to the pin 4 of the control chip U1A, and the emitter is connected to the pin 3 of the control chip U1A via the grounded resistor R2.

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