CN115038207A

CN115038207A - High-frequency large-current pulse type xenon lamp pre-burning system

Info

Publication number: CN115038207A
Application number: CN202210496995.XA
Authority: CN
Inventors: 王金录; 董家佐; 冯杰斌; 赵雪; 赵俊杰
Original assignee: Jilin Keying Medical Laser Co ltd
Current assignee: Jilin Keying Medical Laser Co ltd
Priority date: 2021-05-12
Filing date: 2022-05-09
Publication date: 2022-09-09
Also published as: CN113079605A

Abstract

A high-frequency large-current pulse type xenon lamp pre-burning system relates to a xenon lamp pre-burning system, and solves the problems that the pre-burning circuit in the prior art is unstable in work, the xenon lamp is extinguished at the moment of finishing discharge, and a circuit switch device is subjected to high-voltage breakdown at the moment of turning off due to large discharge current and high frequency; at the moment of finishing discharge, the glow maintaining circuit is a constant current circuit because the internal resistance of the xenon lamp is very small, and when a load is loaded, the glow maintaining circuit is as follows: the power output when the internal resistance of the xenon lamp is close to 0 ohm is close to zero, the power is not enough to maintain the xenon lamp in a glow state, the energy stored by the T2 coil is released in the process to maintain the xenon lamp in the glow state until the internal resistance is increased, and the glow maintaining circuit can work normally.

Description

High-frequency large-current pulse type xenon lamp pre-burning system

Technical Field

The invention relates to a pre-burning system of a xenon lamp, in particular to a high-frequency large-current pulse type pre-burning system of the xenon lamp. The xenon lamp is suitable for high-frequency heavy-current xenon lamps required by medical laser equipment, and is used for providing a pre-burning and current-limiting circuit for the xenon lamp.

Background

At present, in the application of medical equipment, the pulse discharge operation is characterized in that the frequency and the current are high, under the condition, the impedance characteristic change of a xenon lamp is extremely unstable, the impedance of the xenon lamp is between 800 and 1500 ohms in a normal pre-burning state, the impedance of the xenon lamp is between 0.5 and 1.5 ohms in a large-current discharge process, because the impedance of the xenon lamp changes suddenly in such a large range and at high frequency, the operation of a pre-burning circuit is unstable, and the situation that the xenon lamp is extinguished at the moment of the end of discharge often occurs along with the increase of the discharge current and the increase of the discharge frequency. The following technical problems are specifically present:

1. the device application scene determines that the energy output by the xenon lamp has no use effect in the low-current discharge process, the use effect can be achieved only when the discharge current is greater than a fixed value A1, and no work is needed when the current is less than the fixed value A1.

2. Because of the large discharge current and high frequency, the current can reach more than 600A at the moment of ending discharge, and the circuit switch device has very large di/dt (current change rate) to generate very high turn-off overvoltage peak at the turn-off moment, which causes the high-voltage breakdown of individual devices.

Disclosure of Invention

The invention provides a high-frequency large-current pulse type pre-burning system for a xenon lamp, and aims to solve the problems that in the prior art, a pre-burning circuit is unstable in work, the xenon lamp is extinguished at the moment of finishing discharge, and high-voltage breakdown of a circuit switching device is caused at the moment of turning off due to large discharge current and high frequency.

The high-frequency large-current pulse type xenon lamp pre-burning system comprises an auxiliary power supply, an auxiliary circuit, a delay circuit, a pre-burning main loop circuit, a voltage feedback circuit, a high-voltage trigger circuit and a matching circuit of a discharge circuit;

after receiving the pre-burning command, the external control end sends an enabling signal to the auxiliary circuit and sends a control signal to the delay circuit;

the enabling signal controls the auxiliary circuit to send a driving signal to the pre-burning main loop circuit;

the time delay circuit starts timing after receiving the pre-burning signal, if a state signal of successful pre-burning fed back by the main pre-burning loop circuit is received within a set time, the time delay circuit sends a control signal to the auxiliary circuit through the voltage feedback circuit, the voltage feedback circuit controls the auxiliary circuit to normally work, and the time delay circuit simultaneously feeds back the state signal of successful pre-burning to an external control end;

if the delay circuit does not receive the state signal of successful pre-burning within the set time, the delay circuit sends a signal to the auxiliary circuit through the voltage feedback circuit to control the auxiliary circuit to stop working, and meanwhile, the delay circuit sends a state signal of failure pre-burning to an external control end;

the pre-burning main loop circuit starts to work after receiving a control signal sent by an auxiliary power supply, supplies power to the high-voltage trigger circuit and simultaneously supplies power to the xenon lamp through a matching circuit of the discharge circuit;

the pre-burning main loop circuit is connected with the input end of a network power supply through a rectifier bridge; the precombustion main loop circuit is realized by adopting a half-bridge booster circuit and is realized by connecting a resonant energy storage inductor L1 and a resonant energy storage capacitor C1 in series in a half-bridge circuit;

the method specifically comprises the following steps: a step-up transformer T1, a primary side circuit of the step-up transformer T1, and a secondary side circuit of the step-up transformer T1;

the primary side circuit of the voltage transformer T1 comprises a half-bridge inverter switch MOS tube V1, a half-bridge inverter switch MOS tube V2, a diode D4, a diode D5, a resonant energy storage inductor L1, a resonant energy storage capacitor C1, a capacitor C3 and a capacitor C4;

the S pole of the half-bridge inverter switch MOS tube V1 is connected with the D pole of the half-bridge inverter switch MOS tube V2;

the diode D4 and the diode D5 are connected in anti-parallel with the half-bridge inverter switch MOS tube V1 and the half-bridge inverter switch MOS tube V2 respectively;

the capacitor C3 is connected with the half-bridge inversion switch MOS tube V1 in parallel, and the capacitor C4 is connected with the half-bridge inversion switch MOS tube V2 in parallel;

one end of a resonant energy storage inductor L1 is connected with a common point of a half-bridge inverter switch MOS tube V1 and a half-bridge inverter switch MOS tube V2, the other end of the resonant energy storage inductor L1 is connected with one end of a primary coil of a boosting transformer T1, and the primary coil of the boosting transformer T1 is connected with a resonant energy storage capacitor C1 in parallel.

A loop is formed by the primary side of the boosting transformer T1 and a half-bridge inverter switch MOS tube V1, a half-bridge inverter switch MOS tube V2, a resonant energy storage inductor L1 and a resonant energy storage capacitor C1;

the secondary side circuit of the boosting transformer T1 comprises a rectifier bridge D6, a diode D7, a capacitor C2 and a detection circuit D8;

a secondary side coil of the boosting transformer T1 is connected with an input end of a rectifier bridge D6, an output end of one side of the rectifier bridge D6 is connected with a cathode of a diode D7, and an output end of the other side of the rectifier bridge D6 is connected with one end of a detection circuit D8;

the anode of the diode D7 is connected to one end of the capacitor C2, and the other end of the detection circuit D8 is connected to the other end of the capacitor C2.

The invention has the beneficial effects that: the pre-burning system provided by the invention has the advantages that aiming at the working characteristics of the xenon lamp, the secondary side of the transformer T2 is connected in series in the discharge loop of the xenon lamp, and the related parameters of the transformer are specially designed, so that the three using purposes are achieved at the same time:

1. generating an instantaneous high-voltage ionization voltage;

2. the energy which is generated at the moment of starting the discharge and is less than the fixed current value A1 is converted into electromagnetic energy and stored in the coil;

3. at the moment of finishing the discharge, because the internal resistance of the xenon lamp is very small at this moment, the glow maintaining circuit is a constant current circuit, the output power is close to zero when the load (the internal resistance of the xenon lamp) is close to 0 ohm, and the power is not enough to maintain the xenon lamp in a glow state, and the energy stored by the T2 coil is released to maintain the xenon lamp in the glow state in the process until the internal resistance is increased, and the glow maintaining circuit can normally work.

Drawings

FIG. 1 is a schematic block diagram of a high-frequency large-current pulse-type xenon lamp pre-burning system according to the present invention;

FIG. 2 is a circuit diagram of a primary side circuit of a step-up transformer T1 in the pre-combustion main circuit;

FIG. 3 is a circuit diagram of a main circuit of a secondary side circuit of a step-up transformer T1 in a pre-combustion main circuit;

FIG. 4 is a circuit diagram of a high voltage trigger circuit;

fig. 5 is a circuit diagram of a matching circuit of the discharge circuit.

Detailed Description

The embodiment is described with reference to fig. 1 to 5, and the high-frequency large-current pulse-type xenon lamp pre-burning system includes an auxiliary power supply, an auxiliary circuit, a delay circuit, a pre-burning main loop circuit, a voltage feedback circuit, a high-voltage trigger circuit, and a matching circuit of a discharge circuit;

after receiving a pre-burning command of an operator, the external control end sends an enabling signal to the auxiliary circuit and sends a control signal to the delay circuit; wherein, the enable signal controls the auxiliary circuit to start working, and the auxiliary circuit sends a driving signal to the precombustion main loop circuit; and the simultaneous delay circuit starts timing after receiving the control signal, and controls the voltage feedback circuit to execute corresponding actions and simultaneously feed back to a precombustion state signal of the external control end after receiving a precombustion success or failure signal fed back by the precombustion main loop circuit within set time.

The specific working mode is as follows: when the pre-burning of the xenon lamp is successful, the signal level state sent to the voltage feedback circuit by the delay circuit is kept unchanged (the initial state is high level), the auxiliary circuit works normally, and meanwhile, a signal of successful pre-burning of the external control end is fed back, so that an operator can execute corresponding work of the next step; if the pre-burning failure is not successful within the set time, the signal sent to the voltage feedback circuit by the delay circuit switches the level state (from high level to low level), the voltage feedback circuit controls the auxiliary circuit to stop working, and meanwhile, the delay circuit sends a pre-burning failure signal to the external control end.

in this embodiment, the pre-combustion main circuit is connected to the input end of the network power supply through a rectifier bridge and controlled by the auxiliary circuit, and starts to operate after receiving a control signal from the auxiliary power supply, the pre-combustion main circuit employs a half-bridge boost circuit, a resonant energy storage boost circuit is added to the half-bridge circuit, a resonant energy storage inductor L1 and a resonant energy storage capacitor C1 are connected in series to the half-bridge circuit, and the resonant energy storage capacitor C1 is connected in parallel to the primary side of the transformer T1.

In the present embodiment, described with reference to fig. 2 and 3, the main pre-combustion circuit specifically includes: transformer T1, the primary-side circuit of transformer T1, and the secondary-side circuit of transformer T1.

FIG. 2 is a circuit diagram of a primary circuit of T1 in the precombustion main circuit; v1 and V2 are N-type MOS tubes. The primary side circuit of the voltage transformer T1 comprises a half-bridge inverter switch MOS tube V1, a half-bridge inverter switch MOS tube V2, a diode D4, a diode D5, a resonant energy storage inductor L1, a resonant energy storage capacitor C1, a capacitor C3 and a capacitor C4;

the diode D4 and the diode D5 are respectively connected in an anti-parallel mode with the half-bridge inversion switch MOS tube V1 and the half-bridge inversion switch MOS tube V2;

the capacitor C3 is connected with the half-bridge inverter switch MOS tube V1 in parallel, and the capacitor C4 is connected with the half-bridge inverter switch MOS tube V2 in parallel;

one end of a resonant energy storage inductor L1 is connected with a common point of a half-bridge inverter switch MOS tube V1 and a half-bridge inverter switch MOS tube V2, the other end of the resonant energy storage inductor L1 is connected with one end of a primary coil of a boosting transformer T1, and a primary side coil of the boosting transformer T1 is connected with a resonant energy storage capacitor C1 in parallel.

A primary side coil of the transformer T1 forms a loop together with a half-bridge inversion switch MOS tube V1, a half-bridge inversion switch MOS tube V2, a resonant energy storage inductor L1 and a resonant energy storage capacitor C1;

fig. 3 is a secondary side circuit of the pre-burning main circuit T1, the secondary side circuit of the transformer T1 includes a rectifier bridge D6, a diode D7, a capacitor C2 and a detection circuit D8;

a secondary side coil of the transformer T1 is connected with an input end of a rectifier bridge D6, an output end of one side of the rectifier bridge D6 is connected with a cathode of a diode D7, and an output end of the other side of the rectifier bridge D6 is connected with one end of a detection circuit D8;

In this embodiment, the operating characteristics of the precombustion main circuit are as follows: the auxiliary circuit sends out PWM drive signal and adds in half-bridge contravariant switch MOS pipe V1, and half-bridge contravariant switch MOS pipe V1 and half-bridge contravariant switch MOS pipe V2 begin asynchronous switch after half-bridge contravariant switch MOS pipe V2 goes up, and the electric energy that provides the net power supply leads to in the circuit through half-bridge contravariant switch MOS pipe V1 and half-bridge contravariant switch MOS pipe V2.

Firstly, the resonant energy storage capacitor C1 is charged through the resonant energy storage inductor L1 to form electromagnetic energy to be stored in the resonant energy storage inductor L1 and electric energy to be stored in the resonant energy storage capacitor C1, wherein the electric energy stored in the resonant energy storage capacitor C1 generates voltage, due to the combined action of the resonant energy storage inductor L1 and the resonant energy storage capacitor C1, the voltage of the resonant energy storage capacitor C1 changes in a positive and negative wave manner and is added on the primary side of the transformer T1, when the instant value of the voltage value in the positive and negative wave change process is converted into the voltage value of the secondary side of the transformer T1 through the transformation ratio of the transformer T1 and is more than or equal to the timely voltage value of the capacitor C2, energy starts to be transmitted from the primary side of the transformer T1 to the secondary side in the circuit until the voltage value of the resonant energy storage capacitor C1 is reduced to be less than the timely voltage value of the capacitor C2, the energy transmission is finished, at this moment, the electric energy and the electric energy stored in the resonant energy storage capacitor C1 and the power grid pass through the switch tube V1, the energy injected by the V2 is injected into the L1 together to form electromagnetic energy and stored in the L1, when the switch state of the switch tube V1 and V2 is switched, the voltage of the resonant energy storage capacitor C1 is switched by zero crossing gradually in the form of positive ripple waves, and enters a negative pressure stage, in which the energy provided by the inductor L1 and the network voltage is injected into the resonant energy storage capacitor C1 to form electric energy, the voltage is formed in the capacitor and rises in the form of positive sine wave, when the voltage value of the two sides of the resonance energy storage capacitor C1 is larger than the negative capacitor C2 voltage through the transformation ratio conversion value of the transformer T1, the electric energy is continuously transmitted to the secondary side of the T1, the working state is continued to the working state of switching the half-bridge inversion switch MOS tube V1 and the half-bridge inversion switch MOS tube V2, the voltage value of the resonance energy storage capacitor C1 is reduced to be converted into the voltage of the transformer T1 secondary side which is smaller than the voltage of the capacitor C2 in the form of positive sine wave, the energy is stopped being transmitted to the transformer T1 secondary side, and the zero-crossing switching of the voltage of the resonance energy storage capacitor C1 is repeated in the working period.

The advantages of the working mode are as follows: after the capacitance of the resonant energy storage capacitor C1 and the inductance of the resonant energy storage inductor L1 are reasonably matched, the voltage of the primary side of the transformer T1 (namely, the voltage value of C1) rises along with the rise of the voltage of the capacitor C2, because L1 and C1 are both reactive devices, the energy is not lost in the conversion process between L1 and C1, and if the energy injected by the grid power supply is not transferred to C2, the energy is converted into corresponding electric energy and electromagnetic energy to be stored in C1 and L1, and the energy is transferred to C2 on the secondary side until the voltage value of C1 is larger than or equal to the voltage value of C2 on the secondary side; compared with the requirement on the transformation ratio of the transformer in a conventional booster circuit, the number of turns of the secondary side coil of the transformer is greatly reduced, and the reduction of the transformer coil has two advantages of 1) reducing the wire loss and 2) reducing the parasitic capacitance of the parasitic coil. The two points can greatly improve the efficiency and stability of the circuit in the high-frequency high-voltage circuit. In the circuit, a soft switching technology of zero-voltage switching is realized in the work of a half-bridge inversion switch MOS tube V1 and a half-bridge inversion switch MOS tube V2.

The specific implementation process is as follows: in the normal work of circuit, the work chronogenesis of setting for half-bridge contravariant switch MOS pipe V1 and half-bridge contravariant switch MOS pipe V2 is that there is dead time at staggered middle interval, and the cycle is: t0-t1, because when the half-bridge inverter switch MOS transistor V1 and the half-bridge inverter switch MOS transistor V2 are turned on, the voltage on both sides of the switch transistor is about 0.2V, which can be regarded as 0V compared with the peak value 300V voltage, in the turn-off process of the half-bridge inverter switch MOS transistor V1, due to the existence of the capacitor C3 connected in parallel with the half-bridge inverter switch MOS transistor V1, the voltage mutation on both sides of the half-bridge inverter switch MOS transistor V1 is limited, the turn-off speed of V1 is rapid, and the turn-off of the capacitor C3 is completed before the voltage changes;

in a period from t1 to t2 (dead zone), the turn-off of the half-bridge inverter switch MOS tube V1 and the turn-off of the half-bridge inverter switch MOS tube V1 are finished, because the current of the resonant energy storage inductor L1 cannot suddenly change, the inductor current charges the capacitor C3 and discharges the capacitor C4, when the voltage of the capacitor C4 is reduced to 0V, the body diode D5 of the half-bridge inverter switch MOS tube V2 is switched on, and the voltage of the half-bridge inverter switch MOS tube V2 is clamped at 0V by the diode D5;

in a period from t2 to t3, the half-bridge inverter switch MOS tube V2 is turned on at a time point t2, and the voltage on two sides of the half-bridge inverter switch MOS tube V2 is 0V at the time point, so that the turn-on of the half-bridge inverter switch MOS tube V2 is 0V;

in a period from t3 to t4, the turn-off process of the half-bridge inverter switch MOS tube V2 is consistent with the turn-off process of the half-bridge inverter switch MOS tube V1 at the time from t0 to t1, and the half-bridge inverter switch MOS tube V2 realizes zero-voltage turn-off;

the period t4-t5 is the dead-time working time, the working content is consistent with the working mode at the moment t1-t2, and finally the body diode D4 of the half-bridge inverter switch MOS tube V1 is switched on, so that the voltage of the half-bridge inverter switch MOS tube V1 is clamped at 0V, and a condition is created for zero-voltage switching on of the half-bridge inverter switch MOS tube V1;

in a period from t5 to t6, a half-bridge inverter switch MOS tube V1 is turned on under the condition of zero voltage;

in a period from t6 to t7, a half-bridge inverter switch MOS transistor V1 is conducted to work; and then the working state is cycled for t0-t 7.

The working advantages are as follows: the circuit realizes the soft switching working mode of the zero-voltage switch, reduces the power consumption of the switching tube, thereby reducing the heat emission, increasing the working efficiency and the working stability of the circuit and reducing the harmonic interference. The operating characteristics of the high-frequency high-voltage rectifying part circuit are that the input end at the primary side of a step-up transformer T1 is connected with a capacitor C1 in parallel, the voltage waveform is a positive cord wave, so the voltage waveform at the secondary side of the transformer is also a positive cord wave, the operating characteristics of the positive cord wave are that the voltage rises from 0v every period, and the operating characteristics of the diode rectifying bridge are of a voltage control type, namely: the voltage added on the two sides of the diode is conducted as positive voltage, so the conduction of the rectifier bridge diode is conducted after the zero-crossing switching of the positive cord wave voltage output by the secondary side of the step-up transformer T1, but the current starts to be generated when the voltage value of the positive cord wave rises to be larger than the voltage of the capacitor C2, the current stops when the voltage of the positive cord wave drops to be smaller than the voltage of the capacitor C2, the energy in the inverter circuit is stored in the capacitor resonance energy storage capacitor C1 and the resonance energy storage inductor L1 at the moment, and the energy is continuously transmitted to the capacitor C2 until the next period and the electric energy of the power grid jointly act on the resonance energy storage capacitor C1 to generate higher voltage. And the voltage on the secondary side of the transformer T2 does not flow through the rectifying diode in a period of time from the voltage of the capacitor C2 falling to the voltage of the capacitor C2 rising, which creates the condition for zero-current switching of the diode.

The advantages of the circuit are as follows: 1) the rectifier diode soft switch has low self power consumption; 2) the circuit works stably. The circuit is in a constant-current working state under the premise that the network voltage is not changed, and the overvoltage protection circuit stops working when the output voltage is 1000V. The pre-burning main loop circuit supplies power to the high-voltage trigger circuit and simultaneously supplies power to the xenon lamp through the matching circuit of the discharge circuit.

To explain the present embodiment with reference to fig. 3, fig. 3 is a circuit diagram of a high voltage trigger circuit, where the high voltage trigger circuit includes a current-limiting resistor R1, an energy-storage capacitor C5, a gas discharge tube FD1, and a transformer T2;

one end of a capacitor C2 is connected with one end of a current-limiting resistor R1, the other end of a current-limiting resistor R1 is connected with one end of a primary side coil of a T2, the other end of the primary side coil of the T2 is connected with one end of an energy-storing capacitor C5, the other end of an energy-storing capacitor C5 is connected with the other end of a capacitor C2, a gas discharge tube FD1 is connected with an energy-storing capacitor C5 in parallel, one end of a secondary side coil of the T2 is connected with an anode of a xenon lamp XD1, and a cathode of the xenon lamp XD1 is connected with a common end of a capacitor C2 and an energy-storing capacitor C5.

After the output end of the pre-burning main loop circuit enters the high-voltage trigger circuit, the output end of the pre-burning main loop circuit can charge the energy storage capacitor C5 through a current-limiting resistor R1, the capacitor C5 is connected with the gas discharge tube FD1 in parallel and is connected with the primary side of the transformer T2 in series, and the secondary side of the transformer T2, the output side of the pre-burning main loop and the xenon lamp form a loop; when the voltage value of the energy storage capacitor C5 reaches the FD1 breakdown voltage value, FD1 breaks down, excitation is generated on the primary side of the transformer T2, and an instant high voltage is generated on the secondary side of the transformer T2, so that the xenon lamp is instantaneously ionized, and the electric energy provided on the output side of the pre-burning main loop is that the xenon lamp is maintained in a pre-burning state. The output end of the pre-burning main loop circuit charges an energy storage capacitor C5 through a current limiting resistor R1, and the secondary side of the transformer T2, the output end of the pre-burning main loop and the xenon lamp XD1 form a loop.

The present embodiment is described with reference to fig. 5, and the matching circuit of the discharge circuit includes a freewheeling diode D1, a freewheeling diode D2, an anti-reverse diode D3, and a capacitor C6;

the other end of the secondary side coil of the transformer T2 is connected with one end of a capacitor C6, the anode of a freewheeling diode D1 and the anode of an anti-reverse diode D3; the capacitor C6 is connected with a freewheeling diode D1 in parallel;

the cathode of the anti-reverse diode D3 is connected with the anode of the freewheeling diode D2, and the cathode of the freewheeling diode D2 is connected with the other end of the capacitor C6, the cathode of the freewheeling diode D1 and the cathode of the xenon lamp XD 1;

in the embodiment, the anti-reflection diode D3, the secondary coil of the transformer T2 and the xenon lamp XD1 form a discharge loop; the freewheeling diode D1, the xenon lamp XD1 and the secondary side coil of the transformer T2 form a freewheeling loop A; the freewheeling diode D2, the anti-reverse diode D3, the secondary coil of the transformer T2 and the xenon lamp XD1 form a freewheeling circuit B.

In this embodiment, the secondary coil of the transformer T2 is connected to the matching circuit of the discharge circuit and the high-voltage trigger circuit at the same time; before the precombustion is successful, the transformer T2 is used for a high-voltage trigger circuit to generate trigger high voltage; after the pre-burning is successful, the transformer T2 is used for discharging of a matching circuit of the discharging circuit and is used for maintaining the normal operation of the circuit.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The high-frequency large-current pulse type xenon lamp pre-burning system comprises an auxiliary power supply, an auxiliary circuit, a delay circuit, a pre-burning main loop circuit, a voltage feedback circuit, a high-voltage trigger circuit and a matching circuit of a discharge circuit; the method is characterized in that:

the time delay circuit starts timing after receiving the precombustion signal, and if a precombustion successful state signal fed back by the main precombustion loop circuit is received within a set time, the time delay circuit sends a control signal to the auxiliary circuit through the voltage feedback circuit, the voltage feedback circuit controls the auxiliary circuit to normally work, and the time delay circuit simultaneously feeds back a precombustion successful state signal to an external control end;

2. The high-frequency large-current pulse type xenon lamp pre-burning system according to claim 1, wherein:

the output end of the pre-burning main circuit is connected with a high-voltage trigger circuit, and the high-voltage trigger circuit comprises a current-limiting resistor R1, an energy storage capacitor C5, a gas discharge tube FD1 and a transformer T2;

one end of the capacitor C2 is connected with one end of the current-limiting resistor R1, and the other end of the capacitor C2 is connected with one end of the energy-storing capacitor C5;

the other end of the current-limiting resistor R1 is connected with one end of a primary side coil of a transformer T2, and the other end of the primary side coil of the T2 is connected with the other end of an energy-storing capacitor C5;

the gas discharge tube FD1 is connected in parallel with C5;

one end of a secondary side coil of the transformer T2 is connected with an anode of a xenon lamp XD1, a cathode of the xenon lamp XD1 is connected with a common end of a capacitor C2 and an energy storage capacitor C5, and the other end of the secondary side coil of the transformer T2 is connected with an input end of a matching circuit of a discharge circuit;

the output end of the pre-burning main loop circuit charges an energy storage capacitor C5 through a current limiting resistor R1, and the secondary side of the transformer T2, the output end of the pre-burning main loop and the xenon lamp XD1 form a loop.

3. The xenon lamp pre-burning system according to claim 2, wherein: the matching circuit of the discharge circuit comprises a freewheeling diode D1, a freewheeling diode D2, an anti-reverse diode D3 and a capacitor C6;

the cathode of the anti-reverse diode D3 is connected with the anode of the freewheeling diode D2, and the cathode of the freewheeling diode D2 is connected with the other end of the capacitor C6, the cathode of the freewheeling diode D1 and the cathode of the xenon lamp XD 1.

4. The high-frequency large-current pulse type xenon lamp pre-burning system according to claim 3, wherein:

the anti-reverse diode D3, the secondary side coil of the transformer T2 and the xenon lamp XD1 form a discharge loop;

the freewheeling diode D1, the xenon lamp XD1 and the secondary side coil of the transformer T2 form a freewheeling loop A;

the freewheeling diode D2, the anti-reverse diode D3, the secondary coil of the transformer T2 and the xenon lamp XD1 form a freewheeling circuit B.

5. The xenon lamp pre-burning system according to claim 4, wherein:

the secondary side coil of the transformer T2 is simultaneously connected with a matching circuit and a high-voltage trigger circuit of the discharge circuit; before the precombustion is successful, the transformer T2 generates trigger high voltage through a high-voltage trigger circuit; after the pre-burning is successful, the transformer T2 discharges electricity through the matching circuit of the discharge circuit for maintaining the normal operation of the circuit.