An ignition device

Abstract

The ignition device provided by the present invention comprises: a pulse transformer circuit, the pulse transformer circuit comprises a pulse transformer, a first controllable switch and a second controllable switch, wherein the first input end of the primary side of the pulse transformer is externally connected to a DC power supply signal, the second input end is externally connected to a pulse drive signal, the first secondary side is connected to the control end of the first controllable switch, the second secondary side is connected to the control end of the second controllable switch, the first end of the first controllable switch is externally connected to a positive power supply, the first end of the second controllable switch is externally connected to a negative power supply, the second end of the first controllable switch and the second end of the second controllable switch are respectively connected to an ignition coil, and are used to generate an alternating cycle of a voltage-changing pulse signal to power the ignition coil. By implementing the present invention, the problem of low frequency of the arcing circuit and unstable arcing caused by unstable voltage-changing pulse signals is solved.

Description

Technical Field

[0001] The invention relates to the field of spectrum technology, in particular to an ignition device. Background Art

[0002] The arc discharge light source device is used to provide an excitation light source for the oil spectrometer to achieve accurate determination of various trace elements in the oil. The excitation light source of the arc discharge light source device is mainly realized by arc discharge. However, the existing arc discharge circuit has problems such as low arcing circuit frequency and unstable arcing, which makes it impossible to fully excite the sample and affects the accuracy of trace element determination. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects of low arcing frequency and unstable arcing in the arc discharge circuit and the arcing circuit in the prior art, thereby providing an ignition device.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] An embodiment of the present invention provides an ignition device, comprising: a pulse transformer circuit, the pulse transformer circuit comprising a pulse transformer, a first controllable switch and a second controllable switch, wherein the first input end of the primary side of the pulse transformer is externally connected to a DC power supply signal, the second input end is externally connected to a pulse drive signal, the first secondary side is connected to the control end of the first controllable switch, the second secondary side is connected to the control end of the second controllable switch, the first end of the first controllable switch is externally connected to a positive power supply, the first end of the second controllable switch is externally connected to a negative power supply, the second end of the first controllable switch and the second end of the second controllable switch are respectively connected to an ignition coil for generating an alternating cycle of a transformer pulse signal to power the ignition coil.

[0006] In one embodiment, the pulse transformer circuit further includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a first inductor, a first diode and a second diode, wherein the first end of the first secondary side of the pulse transformer is respectively connected to one end of the first resistor and one end of the second resistor, and the second end of the first secondary side is connected to the other end of the first resistor; the other end of the second resistor is connected to the control end of the first controllable switch; the second end of the first controllable switch is respectively connected to the ignition coil and the negative electrode of the first diode; the first end of the second secondary side of the pulse transformer is respectively connected to one end of the third resistor and one end of the fourth resistor, and the second end of the second secondary side is respectively connected to the other end of the third resistor and the first end of the second controllable switch; the other end of the fourth resistor is connected to the control end of the second controllable switch; the second end of the second controllable switch is connected to one end of the first inductor, and the other end of the first inductor is respectively connected to the positive electrode of the ignition coil and the second diode.

[0007] In one embodiment, the ignition device further includes: a comparison circuit, wherein a first input terminal of the comparison circuit is connected to an external AC power signal, and a second input terminal is connected to a reference power supply, and is used to receive a power supply and a reference power supply, and compare the power supply with the reference power supply to generate a timing control signal.

[0008] In one embodiment, the ignition device further includes: a pulse signal generating circuit, the pulse signal generating circuit includes: a timing circuit and a controllable circuit, wherein the input end of the timing circuit is connected to the output end of the comparison circuit, for receiving the timing control signal, and controlling the timing circuit to generate a pulse square wave signal according to the timing control signal; the input end of the controllable circuit is connected to the output end of the timing circuit, for amplifying and outputting the pulse square wave signal.

[0009] In one embodiment, the timing circuit includes: a first timer, a second timer, a third timer and a fourth timer, wherein the first timer and the second timer are standby timers, and the third timer and the fourth timer are working timers.

[0010] In one embodiment, the controllable circuit includes: a third diode, a fourth diode, a fifth diode, a sixth diode, a first capacitor, a fifth resistor, a second capacitor, a sixth resistor, a seventh resistor, an eighth resistor, a third controllable switch and a fourth controllable switch, wherein an anode of the third diode is connected to an anode of the fourth diode, a cathode of the third diode is connected to a cathode of the fifth diode, a cathode of the fourth diode is connected to a cathode of the sixth diode, and an anode of the fifth diode is connected to an anode of the sixth diode; a first end of the third controllable switch is respectively connected to a cathode of the fifth diode and one end of the fifth resistor, a control end of the third controllable switch is connected to one end of the seventh resistor, and a third end of the third controllable switch is grounded; the other end of the fifth resistor is connected to one end of the first capacitor, and the other end of the first capacitor is grounded; a first end of the fourth controllable switch is connected to one end of the sixth resistor, the control end of the fourth controllable switch is connected to one end of the eighth resistor, and the third end of the fourth controllable switch is grounded; the other end of the sixth resistor is connected to one end of the second capacitor, and the other end of the second capacitor is grounded.

[0011] In one embodiment, the ignition device further includes: a power supply circuit, wherein the input end of the power supply circuit is connected to an external power supply, the first output end is respectively connected to the first input end of the primary side of the pulse transformer and the timing circuit, the second output end is connected to the first end of the first controllable switch, the third output end is connected to the first end of the second controllable switch, and the fourth output end is connected to the first input end of the comparison circuit.

[0012] In one embodiment, the power supply circuit includes: a seventh diode, an eighth diode, a ninth resistor, a third capacitor, a fourth capacitor, a tenth resistor, a ninth diode and a fifth capacitor, wherein the cathode of the seventh diode and the anode of the eighth diode are externally connected to an AC power supply signal, the anode of the seventh diode is respectively connected to one end of the ninth resistor and one end of the third capacitor, and the other end of the ninth resistor is connected to the other end of the third capacitor in parallel with the ground; the cathode of the eighth diode is respectively connected to one end of the fourth capacitor and one end of the tenth resistor, the other end of the tenth resistor is respectively connected to the cathode of the ninth diode and one end of the fifth capacitor, the other end of the ninth diode is connected to the other end of the fifth capacitor and grounded, and the other end of the fourth capacitor is grounded.

[0013] The technical solution of the present invention has the following advantages:

[0014] The ignition device provided by the present invention comprises: a pulse transformer circuit, the pulse transformer circuit comprises a pulse transformer, a first controllable switch and a second controllable switch, wherein the first input end of the primary side of the pulse transformer is externally connected to a DC power supply signal, the second input end is externally connected to a pulse drive signal, the first secondary side is connected to the control end of the first controllable switch, the second secondary side is connected to the control end of the second controllable switch, the first end of the first controllable switch is externally connected to a positive power supply, the first end of the second controllable switch is externally connected to a negative power supply, the second end of the first controllable switch and the second end of the second controllable switch are respectively connected to an ignition coil, and are used to generate an alternating cycle of a transformer pulse signal to power the ignition coil. By inputting a DC power supply signal and a pulse drive signal on the primary side of the pulse transformer circuit, modulating the pulse drive signal using a pulse transformer, and controlling the on and off of the two controllable switches, the output of the alternating cycle of the transformer pulse signal is stable, thereby solving the problem of low frequency of the arcing circuit and unstable arcing caused by the unstable transformer pulse signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 is a circuit diagram of a specific example of a pulse transformer circuit in an embodiment of the present invention;

[0017] Figure 2 is a principle block diagram of a specific example of a comparison circuit in an embodiment of the present invention;

[0018] Figure 3 is a circuit diagram of a specific example of a comparison circuit in an embodiment of the present invention;

[0019] Figure 4 is a circuit diagram of a specific example of a timing circuit in an embodiment of the present invention;

[0020] Figure 5 is a circuit diagram of a specific example of a controllable circuit in an embodiment of the present invention;

[0021] Figure 6 is a principle block diagram of a specific example of a power supply circuit in an embodiment of the present invention;

[0022] Figure 7 is a circuit diagram of a specific example of a power supply circuit in an embodiment of the present invention;

[0023] Figure 8It is a timing diagram of the potential in the ignition device according to the embodiment of the present invention. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] The embodiment of the present invention provides an ignition device for providing power to an arc discharge light source device in a spectral instrument. Figure 1As shown, the ignition device includes: a pulse transformer circuit 1, the pulse transformer circuit 1 includes a pulse transformer T2, a first controllable switch Q3 and a second controllable switch Q2, wherein the first input end of the primary side of the pulse transformer T2 is externally connected to a DC power supply signal, the second input end is externally connected to a pulse drive signal, the first secondary side is connected to the control end of the first controllable switch Q3, the second secondary side is connected to the control end of the second controllable switch Q2, the first end of the first controllable switch Q3 is externally connected to a positive power supply, the first end of the second controllable switch Q2 is externally connected to a negative power supply, the second end of the first controllable switch Q3 and the second end of the second controllable switch Q2 are respectively connected to the ignition coil, for generating an alternating cycle of voltage-changing pulse signals to power the ignition coil.

[0029] In a specific embodiment, if Figure 1 As shown, the pulse transformer circuit 1 also includes: a first resistor R6A, a second resistor R6, a third resistor R5A, a fourth resistor R5, a first inductor L1, a first diode CR15 and a second diode CR14, wherein the first end of the first secondary side of the pulse transformer T2 is respectively connected to one end of the first resistor R6A and one end of the second resistor R6, and the second end of the first secondary side is connected to the other end of the first resistor R6A; the other end of the second resistor R6 is connected to the control end of the first controllable switch Q3; the second end of the first controllable switch Q3 is respectively connected to the ignition coil and the negative electrode of the first diode CR15; the first end of the second secondary side of the pulse transformer T2 is respectively connected to one end of the third resistor R5A and one end of the fourth resistor R5, and the second end of the second secondary side is respectively connected to the other end of the third resistor R5A and the first end of the second controllable switch Q2; the other end of the fourth resistor R5 is connected to the control end of the second controllable switch Q2; the second end of the second controllable switch Q2 is connected to one end of the first inductor L1, and the other end of the first inductor L1 is respectively connected to the positive electrode of the ignition coil and the second diode CR14.

[0030] In the embodiment of the present invention, the model of the pulse transformer T2 is GDE25-6 1:1.5:1.5. After the pulse signal is transmitted through the pulse transformer T2, the waveform is neither distorted nor the frequency is changed. After the pulse signal passes through the secondary of the pulse transformer T2, it passes through the first controllable switch Q3 and the second controllable switch Q2, and outputs a pulse signal with a certain duty cycle and period. Among them, the first controllable switch Q3 and the second controllable switch Q2 are both IRG4PC50FDPBF isolated gate bipolar transistors.

[0031] Specifically, Figure 1As shown, 12V is an external DC power supply signal, which serves as the first input terminal of the pulse transformer T2, and the VA signal is an external pulse drive signal, which serves as the second input terminal of the pulse transformer T2. After the VA signal passes through the primary of the pulse transformer T2, two output pulses are generated on average, and then the two output pulses are respectively given to the gate (g) of the first controllable switch Q3 or the gate (g) of the second controllable switch Q2 after passing through the first resistor R6A or the third resistor R5A. When the gate of the first controllable switch Q3 or the gate of the second controllable switch Q2 has a signal input, the first controllable switch Q3 or the second controllable switch Q2 is turned on, and the emitter (e) of the first controllable switch Q3 or the emitter (e) of the second controllable switch Q2 outputs a pulse signal. Since the VA signal controls the first controllable switch Q3 and the second controllable switch Q2 to be turned on and off alternately, an alternating cycle of pulse signals is generated at both ends of E5 and E6. Among them, the first resistor R6A and the third resistor R5A are protection resistors used to protect the secondary of the pulse transformer, and their resistance values ​​are both 560Ω. The second resistor R6 and the fourth resistor R5 are voltage divider resistors, and their resistance values ​​are both 62Ω. The first diode CR15 and the second diode CR14 are RUPP860 protection diodes, which are used to prevent the ignition coil signal connected to both ends of E5 and E6 from backflowing and damaging the first controllable switch Q3 and the second controllable switch Q2. The collector of the second controllable switch Q2 is also connected in series with the first inductor L1 (40uH) to play a delay role, so that the pulses output by E5 and E6 do not overlap.

[0032] The ignition device provided by the present invention comprises: a pulse transformer circuit, the pulse transformer circuit comprises a pulse transformer, a first controllable switch and a second controllable switch, wherein the first input end of the primary side of the pulse transformer is externally connected to a DC power supply signal, the second input end is externally connected to a pulse drive signal, the first secondary side is connected to the control end of the first controllable switch, the second secondary side is connected to the control end of the second controllable switch, the first end of the first controllable switch is externally connected to a positive power supply, the first end of the second controllable switch is externally connected to a negative power supply, the second end of the first controllable switch and the second end of the second controllable switch are respectively connected to an ignition coil, and are used to generate an alternating cycle of a transformer pulse signal to power the ignition coil. By inputting a DC power supply signal and a pulse drive signal on the primary side of the pulse transformer circuit, modulating the pulse drive signal using a pulse transformer, and controlling the on and off of the two controllable switches, the output of the alternating cycle of the transformer pulse signal is stable, thereby solving the problem of low frequency of the arcing circuit and unstable arcing caused by the unstable transformer pulse signal.

[0033] In one embodiment, if Figure 2 As shown, the ignition device also includes: a comparison circuit 2, a first input terminal of the comparison circuit 2 is connected to an external AC power signal, and a second input terminal is connected to a reference power supply, for receiving a power supply and a reference power supply, and comparing the power supply with the reference power supply to generate a timing control signal.

[0034] In a specific embodiment, if Figure 3 As shown, the comparison circuit 2 is a comparison circuit based on LM339AN. The comparison circuit 2 is equipped with four independent voltage comparators (U1A, U1B, U1C and U1D) inside the voltage comparator chip. After the power supply and the reference power supply are compared and processed by the four independent voltage comparators, the output pulse timing control signal is transmitted through the 13th pin of the voltage comparator U1D and the 14th pin of the voltage comparator U1C.

[0035] In one embodiment, if Figure 2 As shown, the ignition device also includes: a pulse signal generating circuit 3, the pulse signal generating circuit 3 includes: a timing circuit 31 and a controllable circuit 32, wherein the input end of the timing circuit 31 is connected to the output end of the comparison circuit 2, for receiving a timing control signal, and controlling the timing circuit 31 to generate a pulse square wave signal according to the timing control signal; the input end of the controllable circuit 32 is connected to the output end of the timing circuit 31, for amplifying and outputting the pulse square wave signal.

[0036] In a specific embodiment, if Figure 4 As shown, the timing circuit 31 includes: a first timer U2, a second timer U3, a third timer U4 and a fourth timer U5, wherein the first timer U2 and the second timer U3 are standby timers, and the third timer U4 and the fourth timer U5 are working timers. Figure 5 As shown, the controllable circuit 32 includes: a third diode CR11, a fourth diode CR10, a fifth diode CR8, a sixth diode CR7, a first capacitor C18A, a fifth resistor R22A, a second capacitor C21A, a sixth resistor R24A, a seventh resistor R20A, an eighth resistor R23A, a third controllable switch Q5 and a fourth controllable switch Q6, wherein the anode of the third diode CR11 is connected to the anode of the fourth diode CR10, the cathode of the third diode CR11 is connected to the cathode of the fifth diode CR8, the cathode of the fourth diode CR10 is connected to the cathode of the sixth diode CR7, and the anode of the fifth diode CR8 is connected to the anode of the sixth diode CR7; The first ends of the three controllable switches Q5 are respectively connected to the cathode of the fifth diode CR8 and one end of the fifth resistor R22A, the control end of the third controllable switch Q5 is connected to one end of the seventh resistor R20A, and the third end of the third controllable switch Q5 is grounded; the other end of the fifth resistor R22A is connected to one end of the first capacitor C18A, and the other end of the first capacitor C18A is grounded; the first end of the fourth controllable switch Q6 is connected to one end of the sixth resistor R24A, the control end of the fourth controllable switch Q6 is connected to one end of the eighth resistor R23A, and the third end of the fourth controllable switch Q6 is grounded; the other end of the sixth resistor R24A is connected to one end of the second capacitor C21A, and the other end of the second capacitor C21A is grounded.

[0037] In the embodiment of the present invention, the model of the first timer U2, the second timer U3, the third timer U4 and the fourth timer U5 in the timing circuit 31 is LMC555CN. The timer model LMC555CN is an integrated circuit chip that can work in three modes, namely, a monostable mode, a bistable mode and an astable mode. In the embodiment of the present invention, the LMC555CN timer works in an astable working mode, in which the LMC555CN timer can output a continuous square wave of a specific frequency. By setting two standby timers in the timing circuit 31, when a working timer fails, the line connection mode can be directly adjusted, and the standby timer can be used to replace the faulty timer to work, without replacing the entire ignition device, thereby reducing maintenance costs.

[0038] Furthermore, the third controllable switch Q5 and the fourth controllable switch Q6 in the controllable circuit 32 are both MOS tubes of the ZVNL110A model. The timing circuit 31 transmits the generated 1KHz pulse square wave timing to the controllable circuit 32, and amplifies the 1KHz pulse square wave timing signal by controlling the driving of the third controllable switch Q5 and the fourth controllable switch Q6 in the controllable circuit 32, so that the output pulse square wave timing signal is sufficient to make the pulse transformer circuit 1 respond.

[0039] The ignition device provided by the present invention optimizes the pulse square wave timing signal generation method, increases the frequency, suppresses the electromagnetic interference signal, and improves the anti-interference ability of the voltage-changing pulse signal, thereby providing a stable voltage-changing pulse signal for the ignition device and reducing the heat generation and noise of the ignition device.

[0040] In one embodiment, if Figure 6 As shown, the ignition device also includes: a power supply circuit 4, wherein the input end of the power supply circuit 4 is connected to an external power supply, the first output end is respectively connected to the first input end of the primary side of the pulse transformer T2 and the timing circuit 31, the second output end is connected to the first end of the first controllable switch Q3, the third output end is connected to the first end of the second controllable switch Q2, and the fourth output end is connected to the first input end of the comparison circuit 2.

[0041] In a specific embodiment, if Figure 7As shown, the power supply circuit 4 includes: a seventh diode CR1, an eighth diode CR2, a ninth resistor R2, a third capacitor C2, a fourth capacitor C1, a tenth resistor R1, a ninth diode CR3 and a fifth capacitor C3, wherein the cathode of the seventh diode CR1 and the anode of the eighth diode CR2 are externally connected to an AC power supply signal, the anode of the seventh diode CR1 is respectively connected to one end of the ninth resistor R2 and one end of the third capacitor C2, the other end of the ninth resistor R2 and the other end of the third capacitor C2 are connected in parallel to the ground; the cathode of the eighth diode CR2 is respectively connected to one end of the fourth capacitor C1 and one end of the tenth resistor R1, the other end of the tenth resistor R1 is respectively connected to the cathode of the ninth diode CR3 and one end of the fifth capacitor C3, the other end of the ninth diode CR3 is connected to the other end of the fifth capacitor C3 and grounded, and the other end of the fourth capacitor C1 is grounded.

[0042] In a specific embodiment, the power supply circuit 4 uses 125VAC, 50Hz AC input, wherein the input 125VAC, 50Hz AC can be generated by a transformer. The 125VAC AC is rectified by the seventh diode CR1 and the eighth diode CR2 and filtered by the third capacitor C2 and the fourth capacitor C1 to generate +12VDC, which supplies power to the pulse transformer circuit 1, the comparison circuit 2 and the pulse signal generating circuit 3. Figure 8 Shown is a timing diagram of key potentials in the ignition device.

[0043] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention.

Claims

1. An ignition device, characterized in that: include: A pulse transformer circuit, the pulse transformer circuit comprising a pulse transformer, a first controllable switch and a second controllable switch, wherein the first input end of the primary side of the pulse transformer is externally connected to a DC power supply signal, the second input end is externally connected to a pulse drive signal, the first secondary side is connected to the control end of the first controllable switch, the second secondary side is connected to the control end of the second controllable switch, the first end of the first controllable switch is externally connected to a positive power supply, the first end of the second controllable switch is externally connected to a negative power supply, the second end of the first controllable switch and the second end of the second controllable switch are respectively connected to an ignition coil, for generating an alternating cycle of a voltage-changing pulse signal to power the ignition coil; The pulse transformer circuit further includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a first inductor, a first diode and a second diode, wherein: The first end of the first secondary side of the pulse transformer is connected to one end of the first resistor and one end of the second resistor respectively, and the second end of the first secondary side is connected to the other end of the first resistor; The other end of the second resistor is connected to the control end of the first controllable switch; The second end of the first controllable switch is connected to the ignition coil and the cathode of the first diode respectively; The first end of the second secondary side of the pulse transformer is respectively connected to one end of the third resistor and one end of the fourth resistor, and the second end of the second secondary side is respectively connected to the other end of the third resistor and the first end of the second controllable switch; The other end of the fourth resistor is connected to the control end of the second controllable switch; The second end of the second controllable switch is connected to one end of the first inductor, and the other end of the first inductor is connected to the ignition coil and the positive electrode of the second diode respectively; It also includes: a comparison circuit, wherein a first input terminal of the comparison circuit is connected to an external AC power supply signal, and a second input terminal is connected to a reference power supply, and is used to receive a power supply and a reference power supply, and compare the power supply with the reference power supply to generate a timing control signal; It also includes: a pulse signal generating circuit, the pulse signal generating circuit includes: a timing circuit and a controllable circuit, wherein: The input end of the timing circuit is connected to the output end of the comparison circuit, and is used to receive the timing control signal, and control the timing circuit to generate a pulse square wave signal according to the timing control signal; The input end of the controllable circuit is connected to the output end of the timing circuit, and is used to amplify and output the pulse square wave signal; The timing circuit comprises: a first timer, a second timer, a third timer and a fourth timer, wherein the first timer and the second timer are standby timers, and the third timer and the fourth timer are working timers; The controllable circuit includes: a third diode, a fourth diode, a fifth diode, a sixth diode, a first capacitor, a fifth resistor, a second capacitor, a sixth resistor, a seventh resistor, an eighth resistor, a third controllable switch and a fourth controllable switch, wherein: The anode of the third diode is connected to the anode of the fourth diode, the cathode of the third diode is connected to the cathode of the fifth diode, the cathode of the fourth diode is connected to the cathode of the sixth diode, and the anode of the fifth diode is connected to the anode of the sixth diode; The first end of the third controllable switch is connected to the cathode of the fifth diode and one end of the fifth resistor respectively, the control end of the third controllable switch is connected to one end of the seventh resistor, and the third end of the third controllable switch is grounded; The other end of the fifth resistor is connected to one end of the first capacitor, and the other end of the first capacitor is grounded; A first end of the fourth controllable switch is connected to one end of the sixth resistor, a control end of the fourth controllable switch is connected to one end of the eighth resistor, and a third end of the fourth controllable switch is grounded; The other end of the sixth resistor is connected to one end of the second capacitor, and the other end of the second capacitor is grounded.

2. The ignition device according to claim 1, characterized in that: Also includes: Power supply circuit, where The input end of the power supply circuit is connected to an external power supply, the first output end is respectively connected to the first input end of the primary side of the pulse transformer and the timing circuit, the second output end is connected to the first end of the first controllable switch, the third output end is connected to the first end of the second controllable switch, and the fourth output end is connected to the first input end of the comparison circuit.

3. The ignition device according to claim 2, characterized in that: The power supply circuit includes: a seventh diode, an eighth diode, a ninth resistor, a third capacitor, a fourth capacitor, a tenth resistor, a ninth diode and a fifth capacitor, wherein: The cathode of the seventh diode and the anode of the eighth diode are externally connected to an AC power signal, the anode of the seventh diode is respectively connected to one end of the ninth resistor and one end of the third capacitor, and the other end of the ninth resistor and the other end of the third capacitor are connected to the ground in parallel; The cathode of the eighth diode is connected to one end of the fourth capacitor and one end of the tenth resistor respectively, the other end of the tenth resistor is connected to the cathode of the ninth diode and one end of the fifth capacitor respectively, the other end of the ninth diode is connected to the other end of the fifth capacitor and grounded, and the other end of the fourth capacitor is grounded.

Images