An ignition device and method based on microcontroller-controlled IGBT

Abstract

This invention relates to the field of aviation ignition device technology, and discloses an ignition device based on a microcontroller-controlled IGBT, comprising a switching power supply, a microcontroller control circuit, a PC control terminal, an IGBT drive circuit, an IGBT circuit, a boost energy storage circuit, and a high-voltage pulse output circuit. This invention also discloses an ignition method based on a microcontroller-controlled IGBT, comprising the following steps: Step S1, turning on the switching power supply and charging the energy storage capacitor Cc in the boost energy storage circuit; Step S2, setting the ignition frequency and ignition timing on the PC control terminal; Step S3, sending the set ignition frequency and ignition timing information to the microcontroller control circuit; Step S4, after receiving the ignition frequency and ignition timing information, the microcontroller control circuit controls the IGBT drive circuit, and controls the IGBT circuit according to the IGBT drive circuit; Step S5, controlling the boost energy storage circuit and the high-voltage pulse output circuit according to the IGBT circuit to control the ignition frequency and ignition timing. This invention is used to control the ignition frequency and ignition timing.

Description

Technical Field

[0001] This invention relates to the field of aviation ignition device technology, specifically, to an ignition device and method based on a microcontroller controlling an IGBT, used to control the ignition frequency and ignition timing. Background Technology

[0002] In the field of aero-engines, the ignition system is an important component. The ignition system mainly consists of an ignition device, an ignition cable, and an ignition nozzle. The ignition device converts low-voltage DC power into high-voltage DC pulse power. The high electrical energy generated by the ignition device is transmitted to the ignition nozzle by the ignition cable. When the nozzle is punctured, it generates an electric spark to ignite the fuel-air mixture in the combustion chamber.

[0003] Currently, the ignition frequency and timing of aircraft engines cannot be remotely controlled in real time. Summary of the Invention

[0004] The purpose of this invention is to provide an ignition device and method based on a microcontroller controlling an IGBT, which can realize remote real-time control of the ignition device and control the ignition frequency and ignition timing.

[0005] The present invention is achieved through the following technical solution: an ignition device based on a microcontroller-controlled IGBT, comprising a switching power supply, a microcontroller control circuit, a PC control terminal, an IGBT drive circuit, an IGBT circuit, a boost energy storage circuit, and a high-voltage pulse output circuit;

[0006] The switching power supply, PC control terminal, and IGBT drive circuit are respectively connected to the microcontroller control circuit. The IGBT drive circuit is connected to and drives the IGBT circuit. The IGBT circuit is respectively connected to the boost energy storage circuit and the high-voltage pulse output circuit.

[0007] After selecting the ignition frequency and ignition timing from the PC control terminal, a communication signal is sent from the communication port to the microcontroller control circuit. The microcontroller control circuit sends a control signal to the IGBT drive circuit, and the IGBT drive circuit sends a drive signal to drive the IGBT circuit.

[0008] The energy storage capacitor Cc in the high-voltage pulse output circuit is charged by the power input. When the IGBT circuit is driven to conduct, the energy storage capacitor Cc discharges and is output by the ignition device through the high-voltage pulse output circuit to control the ignition frequency and ignition timing.

[0009] To better realize the present invention, the power supply is further input into the switching power supply to power the microcontroller control circuit.

[0010] To better realize the present invention, when the power supply is input to the boost energy storage circuit, the T1 transformer of the boost energy storage circuit boosts the voltage and then it is rectified by diodes D1, D2, D3, and D4. After rectification, it passes through resistor R1 and diode D11 in sequence, and finally connects to resistor R2 and energy storage capacitor Cc in parallel to complete the charging of energy storage capacitor Cc.

[0011] To better realize the present invention, the IGBT circuit is further turned on after receiving the drive signal from the IGBT drive circuit. At this time, the energy storage capacitor Cc discharges and is output to the high-voltage pulse output circuit through the IGBT. In the high-voltage pulse output circuit, the autotransformer T2 is connected to the capacitor Cb and the ignition device P1 respectively. After the autotransformer T2 performs a secondary voltage boost in the high-voltage pulse output circuit, the high-voltage pulse is output from the ignition device P1 for ignition.

[0012] To better implement the present invention, step S5 further includes:

[0013] When the IGBT circuit is driven to conduct, the energy storage capacitor Cc in the boost energy storage circuit discharges, and the discharge is output by the ignition device through the high-voltage pulse output circuit to control the ignition frequency and ignition timing.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0015] (1) This invention provides an ignition device based on a microcontroller controlling an IGBT, which can realize remote real-time control of the ignition device and control the ignition frequency and ignition timing;

[0016] (2) The present invention has high control precision and good stability, and has good economic and practical value. Attached Figure Description

[0017] The present invention will be further described in conjunction with the following drawings and embodiments. All inventive concepts of the present invention should be considered as disclosed content and within the scope of protection of the present invention.

[0018] Figure 1 The present invention provides a schematic diagram of a switching power supply, a microcontroller control circuit, and a PC control terminal for an ignition device based on a microcontroller-controlled IGBT.

[0019] Figure 2 This invention provides a schematic diagram of an IGBT drive circuit for an ignition device based on a microcontroller controlling an IGBT.

[0020] Figure 3 This invention provides a schematic diagram of a boost energy storage circuit for an ignition device based on a microcontroller-controlled IGBT.

[0021] Figure 4This invention provides a schematic diagram of the IGBT circuit and high-voltage pulse output circuit for an ignition device based on a microcontroller-controlled IGBT. Detailed Implementation

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments, and therefore should not be regarded as a limitation on the scope of protection. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1:

[0024] This embodiment provides an ignition device based on a microcontroller controlling an IGBT, such as... Figures 1-4 As shown, the power input is to a switching power supply, which outputs +5V and +15V to power the microcontroller control circuit. The PC control terminal selects the ignition frequency and timing and sends a communication signal to control the microcontroller. Upon receiving the communication signal from the PC control terminal, the microcontroller outputs a control signal to the IGBT driver circuit. The IGBT driver circuit, upon receiving the control signal from the microcontroller, sends a drive signal to the IGBT. The power input is boosted by transformer T1 and rectified by diodes D1, D2, D3, and D4 to charge the energy storage capacitor Cc. When the IGBT receives the drive signal from the IGBT driver circuit, the IGBT turns on, and the energy storage capacitor Cc discharges. The discharge then goes through the IGBT and is output to autotransformer T2. Autotransformer T2 performs a secondary boost and outputs a high-voltage pulse for ignition.

[0025] Example 2:

[0026] This embodiment is a further optimization based on Embodiment 1, such as... Figure 1 As shown, the power supply is first input into the switching power supply. Then, the switching power supply outputs +5V and +15V voltages. The +5V and +15V voltages output by the switching power supply power the microcontroller control circuit. After the PC control terminal selects the ignition frequency and ignition timing, it sends a communication signal to the microcontroller control circuit through the communication port and controls the microcontroller.

[0027] The other parts of this embodiment are the same as those in Embodiment 1, so they will not be described again.

[0028] Example 3:

[0029] This embodiment is a further optimization based on the above embodiment 1 or 2, such as... Figures 1-2As shown, after receiving the communication signal from the PC control terminal, the microcontroller control circuit outputs a control signal to the IGBT drive circuit.

[0030] The other parts of this embodiment are the same as those in Embodiment 1 or 2 above, so they will not be described again.

[0031] Example 4:

[0032] This embodiment is a further optimization based on any one of embodiments 1-3 above, such as... Figures 2-3 As shown, after receiving the control signal from the microcontroller control circuit, the IGBT driver circuit sends a drive signal to the IGBT driver circuit. The first interface of the IGBT driver circuit is connected to the first interface of the IGBT circuit, and the second interface of the IGBT driver circuit is connected to the second interface of the IGBT circuit. When the IGBT circuit receives the drive signal from the IGBT driver circuit, the IGBT circuit is turned on.

[0033] The Insulated Gate Bipolar Transistor (IGBT) combines the advantages of both GTR and MOSFET, exhibiting excellent characteristics. The IGBT is also a three-terminal device, consisting of a gate (G), collector (C), and emitter (E). In an IGBT circuit, the emitter is connected in parallel to a capacitor Cg-1 and a resistor Rg-1.

[0034] The other parts of this embodiment are the same as any one of the embodiments 1-3 above, so they will not be described again.

[0035] Example 5:

[0036] This embodiment is a further optimization based on any one of embodiments 1-4 above, such as... Figures 3-4 As shown, in the boost energy storage circuit, power is input from the AC1 and AC2 interfaces. After the power is input to the T1 transformer and boosted, it is rectified by diodes D1, D2, D3, and D4. After rectification, it passes through resistor R1 and diode D11 in sequence, and finally connects to resistor R2 and energy storage capacitor Cc in parallel to complete the charging of energy storage capacitor Cc.

[0037] The other parts of this embodiment are the same as any one of the embodiments 1-4 above, so they will not be described again.

[0038] Example 6:

[0039] This embodiment is a further optimization based on any one of embodiments 1-5 above, such as... Figures 3-4As shown, when the IGBT circuit receives the drive signal from the IGBT drive circuit, the IGBT circuit turns on. At this time, the energy storage capacitor Cc discharges and is output to the high-voltage pulse output circuit through the IGBT. In the high-voltage pulse output circuit, the autotransformer T2 is connected to the capacitor Cb and the ignition device P1 respectively. After the autotransformer T2 performs a secondary voltage boost in the high-voltage pulse output circuit, the high-voltage pulse is output from the ignition device P1 for ignition.

[0040] The other parts of this embodiment are the same as any one of the embodiments 1-5 above, so they will not be described again.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A single-chip microcomputer-based ignition device that controls an IGBT, characterized by, The switch power supply, the PC control terminal and the IGBT driving circuit are connected with the single-chip microcomputer control circuit respectively, the IGBT driving circuit is connected with and drives the IGBT circuit, and the IGBT circuit is connected with the voltage-boosting energy storage circuit and the high-voltage pulse output circuit respectively. The switch power supply, the PC control terminal and the IGBT driving circuit are connected with the single-chip microcomputer control circuit respectively, the IGBT driving circuit is connected with and drives the IGBT circuit, and the IGBT circuit is connected with the voltage-boosting energy storage circuit and the high-voltage pulse output circuit respectively. After the ignition frequency and the ignition timing are selected from the PC control terminal and the communication signal is sent to the single-chip microcomputer control circuit from the communication port, the single-chip microcomputer control circuit sends the control signal to the IGBT driving circuit, and the IGBT driving circuit sends the driving signal to drive the IGBT circuit. The energy storage capacitor Cc in the high-voltage pulse output circuit is charged through the power input, and when the IGBT circuit is driven to be turned on, the energy storage capacitor Cc is discharged and the ignition device is output through the high-voltage pulse output circuit to control the ignition frequency and the ignition timing. When the IGBT circuit receives the driving signal of the IGBT driving circuit, the IGBT circuit is turned on, at this time, the energy storage capacitor Cc is discharged and the high-voltage pulse is output from the ignition device P1 through the IGBT circuit and the high-voltage pulse output circuit, and the self-coupling transformer T2 in the high-voltage pulse output circuit is connected with the capacitor Cb and the ignition device P1 respectively, and the high-voltage pulse is output from the ignition device P1 through the self-coupling transformer T2 in the high-voltage pulse output circuit after the secondary voltage boosting.

2. The ignition device based on single-chip microcomputer control IGBT according to claim 1, characterized in that, The power input is input into the switch power supply to supply power for the single-chip microcomputer control circuit. The power input is input into the switch power supply to supply power for the single-chip microcomputer control circuit.

3. The ignition device based on single-chip microcomputer control IGBT according to claim 1, characterized in that, When the power input is input into the voltage-boosting energy storage circuit, the T1 transformer of the voltage-boosting energy storage circuit is boosted, and then rectified by the D1, D2, D3 and D4 diodes, and then sequentially passes through the resistor R1 and the diode D11, and finally is connected in parallel with the resistor R2 and the energy storage capacitor Cc to complete the charging of the energy storage capacitor Cc. The power input is input into the switch power supply to supply power for the single-chip microcomputer control circuit.

4. The ignition method of the ignition device based on the single-chip microcomputer controlled IGBT according to any one of claims 1 to 3, characterized by, Step S1, turn on the switch power supply and charge the energy storage capacitor Cc in the voltage-boosting energy storage circuit; Step S2, set the ignition frequency and the ignition timing in the PC control terminal; Step S3, send the information of the set ignition frequency and the ignition timing to the single-chip microcomputer control circuit; Step S4, after the single-chip microcomputer control circuit receives the information of the ignition frequency and the ignition timing, control the IGBT driving circuit and control the IGBT circuit according to the IGBT driving circuit; Step S5, control the voltage-boosting energy storage circuit and the high-voltage pulse output circuit according to the IGBT circuit to control the ignition frequency and the ignition timing. The power input is input into the switch power supply to supply power for the single-chip microcomputer control circuit.

5. The method according to claim 4, wherein the IGBT is controlled by a single-chip microcomputer. When the IGBT circuit is driven to be turned on, the energy storage capacitor Cc in the voltage-boosting energy storage circuit is discharged, and the ignition device is output through the high-voltage pulse output circuit to control the ignition frequency and the ignition timing. ​

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