A high-precision digital ignition device for generators

Abstract

The invention discloses a high-precision digital ignition device for a generator, comprising a high-voltage cap, a high-voltage line connected to the cap, a trigger, a control circuit, a housing, a trigger signal line matched with the trigger, a stator motor, a motor power line matched with the stator motor, a grounding line connected with the stator motor, an iron core, an epoxy material arranged in the housing, and a booster coil group. The control circuit comprises an MCU, an MCU power circuit, an igniter trigger signal acquisition circuit, an ignition signal output circuit, an igniter flameout signal acquisition circuit, an oil cut protection signal input circuit, and an oil warning light output circuit.

Description

Technical Field

[0001] The invention belongs to the technical field of ignition devices for generators, and in particular relates to a high-precision digital ignition device for generators. Background Art

[0002] The traditional generator ignition module consists of a rotor, a stator, a trigger, a high-voltage package, a wiring harness, etc. When the rotor rotates, the magnetic steel on the rotor passes through the trigger, causing the trigger to sense a set of waveforms consisting of two positive and negative sine waves. This set of waveform signals is connected to the high-voltage package through the wiring harness. The control module in the high-voltage package collects and processes this set of signals, and ignites after a delay after sensing the arrival of the signal. The signal processing and delay value and other information are processed by the MCU in the control module.

[0003] However, the traditional control module circuit in the high-voltage package is simple, and only the positive wave of the two sets of positive and negative signals of the trigger is used as the trigger signal, and the negative wave is filtered out by the filter circuit. The control module can only rely on the single wave generated by each rotation of the rotor as the time base. Therefore, especially when the generator speed is low, the MCU processes the signal and then sends the ignition signal after a period of delay. The error is large, which will lead to insufficient ignition accuracy and violent shaking of the generator body. In special cases, there will be great safety hazards. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a high-precision digital ignition device for a generator.

[0005] In order to achieve the above purpose, the present invention adopts the following technical scheme: a high-precision digital ignition device for a generator, including a high-voltage cap, a high-voltage line connected to the high-voltage cap, a trigger, a control circuit, a housing, a trigger signal line matched with the trigger, a stator motor, a motor power line matched with the stator motor, a grounding line connected to the stator motor, an iron core, an epoxy material and a booster coil group arranged in the housing, the control circuit includes an MCU, an MCU power circuit, an igniter trigger signal acquisition circuit, an ignition signal output circuit, an igniter flameout signal acquisition circuit, an oil cut protection signal input circuit and an oil warning light output circuit; the igniter trigger signal acquisition circuit can use the positive and negative waveforms sensed by the trigger at the same time, respectively as the time base for the control module to calculate the cycle and the time base for the delay value to start calculating. Therefore, this digital ignition device has the advantages of sensitive response to speed changes, high ignition timing accuracy, low signal misidentification probability, and safe and stable operation of the generator.

[0006] Preferably, the MCU power supply circuit of the igniter includes a resistor R1, a resistor R2, a capacitor C1, a capacitor C2, a diode D1, a voltage regulator D2, a transistor Q1 and a motor power line J1, one end of the diode D1 is connected to one end of the resistors R1 and R2, and the other end is connected to the motor power line J1, one end of the resistor R1 is connected to the collector of the transistor Q1, one end of the resistor R2 is connected to the base of the transistor Q1, the negative electrode of the voltage regulator D2 and one end of the capacitor C1, one end of the capacitor C1 and the positive electrode of the voltage regulator D2 are grounded, and the emitter of the transistor Q1 is connected to the positive electrode of the electrolytic capacitor C2; when the generator works normally, the rotor rotates, and the charging coil on the stator cuts the magnetic field lines to generate a stable charging wave, which is connected to the MCU power supply circuit 11 through the motor power line J1. After passing through the diode D1, the charging wave is connected to the base and collector of the transistor Q1 through the parallel connection of R1 and R2. The voltage regulator D2 stabilizes the voltage to about 5V, and the capacitor C1 is used for filtering. Thus, the emitter of the transistor Q1 can obtain VCC that can stably supply the MCU, and the voltage is stabilized by the electrolytic capacitor C2.

[0007] Preferably, the igniter trigger signal acquisition circuit includes resistor R3, resistor R4, resistor R5, resistor R6, resistor R7, resistor R8, resistor R9, resistor R10, resistor R11, capacitor C3, capacitor C4, capacitor C5, capacitor C6, capacitor C7, diode D3, diode D4, diode D5, transistor Q2 transistor Q3 and trigger signal line J2, one end of the trigger signal line J2 is connected to resistor R3, resistor R4 and resistor R5, the positive electrode of capacitor C4 is connected to the negative electrode of capacitor C5, the other end of capacitor C3 is grounded, the negative electrode of diode D3 is connected to the negative electrode of diode D4, the positive electrode of diode D4 is grounded, and capacitor The negative electrode of C4 is connected to one end of the resistor R6 and the base of the transistor Q2, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected to one end of the resistor R8 and the resistor R9, one end of the resistor R9 is connected to the MCU and one end of the capacitor C6, the other end of the capacitor C6 is grounded, the positive electrode of the capacitor C5 is connected to the resistor R7 and the negative electrode of the diode D5, the positive electrode of the diode D5 is connected to the emitter of the transistor Q3, the collector of the transistor Q3 is connected to the resistor R10 and the resistor R11, and the other end of the resistor R11 is connected to the MCU and the capacitor C7 end; when the rotor rotates, the trigger senses a group of alternating signals composed of positive waves and negative waves, that is, the trigger signal. The trigger signal passes through the trigger signal line J2, and is divided by the parallel resistors R3, R4, and R5. The capacitor C3 is responsible for filtering, and the voltage stabilization and protection circuit is responsible for two reverse TVS diodes. Use two electrolytic capacitors C4 and C5 with opposite polarities to store energy for this group of waveforms, and connect resistors R6 and R7 in parallel respectively. As a result, the base of transistor Q2 can obtain a waveform that is mostly negative and only a small part is positive. When the positive wave arrives, Q2 is turned on, the collector changes from high level to low level, and MCU pin 6 recognizes the level change, and the first trigger signal is obtained. Similarly, the emitter of Q3 can recognize a small part of the negative wave after rectification by diode D5. When the entire negative wave arrives, MCU pin 7 will recognize the high level changes to low level, and the second trigger signal is obtained.

[0008] Preferably, the ignition signal output circuit of the igniter includes a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C8, a diode D6, a diode D7, a diode D8, a transistor Q4, a transistor Q5, a transistor Q6, a motor power line J1, a high-voltage coil connection J3 and a grounding line J4. The resistor R12, the cathode of the diode D6, the collector of the transistor Q4 and the collector of the transistor Q6 are all connected to the high-voltage coil connection J3, the capacitor D8 is grounded and connected to the grounding line J4, the cathode of the diode D7 is connected to the motor power line J1, and the base of the transistor Q6 is connected to the emitter of the transistor Q4. The base of Q4 is connected to the cathode of diode D8, the anode of diode D8 is connected to one end of resistor R13, one end of resistor R13 is connected to the emitter of transistor Q5, the collector of transistor Q5 is connected to one end of resistor R15, the base of transistor Q5 is connected to one end of resistor R14, and one end of resistor R14 is connected to MCU; MCU pin 2 outputs a high level when there is no action. At this time, according to the circuit diagram, transistors Q4, Q5, and Q6 are all turned on, and the charging wave on the motor power line J1 passes through transistor Q6 to the boost coil J3 to form a loop. When MCU detects the trigger signal and is ready to output the ignition signal, MCU first outputs a low level through pin 2, turning off transistor Q5 and correspondingly turning off transistors Q4 and Q6, so that the charging wave is temporarily stored on the electrolytic capacitor C8. After a short delay, the MCU first outputs a high level through pin 2, and transistors Q4, Q5, and Q6 are turned on again. The energy stored in the electrolytic capacitor C8 is released instantly, and ignition is completed through the boost coil.

[0009] In summary, the ignition trigger signal acquisition circuit can use the positive and negative waveforms sensed by the trigger at the same time as the time base for the control module to calculate the cycle and the time base for the delay value to start calculating. Therefore, this digital ignition device has the advantages of sensitive response to speed changes, high ignition timing accuracy, low signal misidentification probability, and safe and stable generator operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is the schematic diagram of the MCU power supply circuit.

[0011] Figure 2 This is the schematic diagram of the igniter trigger signal acquisition circuit.

[0012] Figure 3 This is the schematic diagram of the ignition signal output circuit.

[0013] Figure 4 This is the corresponding diagram of MCU control pins.

[0014] Figure 5 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0015] like Figure 1-5 As shown, a high-precision digital ignition device for a generator includes a high-voltage cap 1, a high-voltage line 2 connected to the above, a trigger, a control circuit 3, a housing 4, a trigger signal line 5 matched with the above trigger, a stator motor, a motor power line 6 matched with the above stator motor, a grounding line 7 connected to the above stator motor, an iron core 8, an epoxy material 9 arranged in the housing, and a boost coil group 10. The control circuit includes an MCU, an MCU power circuit, an igniter trigger signal acquisition circuit, an ignition signal output circuit, an igniter flameout signal acquisition circuit, an oil cut protection signal input circuit, and an oil warning light output circuit; a reliable VCC is obtained through the MCU power circuit to supply the entire control module. The igniter trigger signal acquisition circuit separates the collected trigger signal consisting of a positive wave and a negative wave into two low-level signals through the circuit. The pin 6 of the MCU first senses the level (the low level corresponding to the positive wave), and through program control, refreshes the timer to obtain the current rotation period T of the generator, and the current speed of the generator can be converted through the period T. When the MCU's pin 7 recognizes a low level (a low level corresponding to a negative wave), the program can use this signal as a reference to delay, and after a period of delay, an ignition signal is sent through the MCU's pin 2. The ignition signal completes the ignition through the ignition signal output circuit. In addition, in order to ensure other basic performances of the generator, the ignition device flameout signal acquisition circuit, the oil cut-off protection signal input circuit, and the oil warning light output circuit are also controlled accordingly by the MCU.

[0016] Preferably, the MCU power supply circuit of the igniter includes a resistor R1, a resistor R2, a capacitor C1, a capacitor C2, a diode D1, a voltage regulator D2, a transistor Q1 and a motor power line J1, one end of the diode D1 is connected to one end of the resistors R1 and R2, and the other end is connected to the motor power line J1, one end of the resistor R1 is connected to the collector of the transistor Q1, one end of the resistor R2 is connected to the base of the transistor Q1, the negative electrode of the voltage regulator D2 and one end of the capacitor C1, one end of the capacitor C1 and the positive electrode of the voltage regulator D2 are grounded, the emitter of the transistor Q1 is connected to the positive electrode of the electrolytic capacitor C2, and provides the VCC of the entire control module. The negative electrode of the electrolytic capacitor C2 is grounded; when the generator works normally, the rotor rotates, and the charging coil on the stator cuts the magnetic lines of force to generate a stable charging wave, which is connected to the MCU power supply circuit 11 through the motor power line J1. After the charging wave passes through diode D1, it is connected to the base and collector of transistor Q1 through the parallel connection of R1 and R2. The voltage regulator D2 stabilizes the voltage to about 5V, and the capacitor C1 acts as a filter. The emitter of transistor Q1 can obtain VCC that can stably supply the MCU, and the voltage is stabilized by the electrolytic capacitor C2.

[0017] Preferably, the igniter trigger signal acquisition circuit includes resistor R3, resistor R4, resistor R5, resistor R6, resistor R7, resistor R8, resistor R9, resistor R10, resistor R11, capacitor C3, capacitor C4, capacitor C5, capacitor C6, capacitor C7, diode D3, diode D4, diode D5, transistor Q2, transistor Q3 and trigger signal line J2, one end of the trigger signal line J2 is connected to resistor R3, resistor R4 and resistor R5, the positive electrode of capacitor C4 is connected to the negative electrode of capacitor C5, the other end of capacitor C3 is grounded, the negative electrode of diode D3 is connected to the negative electrode of diode D4, the positive electrode of diode D4 is grounded, and the negative electrode of capacitor C4 is grounded. The positive electrode of the transistor Q3 is connected to one end of the resistor R6 and the base of the transistor Q2, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected to one end of the resistor R8 and the resistor R9, one end of the resistor R9 is connected to the pin 6 of the MCU and one end of the capacitor C6, the other end of the capacitor C6 is grounded, the positive electrode of the capacitor C5 is connected to the resistor R7 and the negative electrode of the diode D5, the positive electrode of the diode D5 is connected to the emitter of the transistor Q3, the collector of the transistor Q3 is connected to the resistor R10 and the resistor R11, and the other end of the resistor R11 is connected to the pin 7 of the MCU and the capacitor C7 end; when the rotor rotates, the trigger senses a group of alternating signals composed of positive waves and negative waves, that is, the trigger signal. The trigger signal passes through the trigger signal line J2, and is divided by the parallel resistors R3, R4, and R5. The capacitor C3 is responsible for filtering, and the voltage stabilization and protection circuit is responsible for two reverse TVS diodes. Use two electrolytic capacitors C4 and C5 with opposite polarities to store energy for this set of waveforms, and connect resistors R6 and R7 in parallel respectively. As a result, the base of transistor Q2 can obtain a waveform that is mostly negative and only a small part is positive. When the positive wave arrives, Q2 is turned on, the collector changes from high level to low level, and MCU pin 6 recognizes the level change, and the first trigger signal is obtained. Similarly, a small part of the negative wave after rectification by diode D5 can be recognized on the emitter of Q3. When the entire negative wave arrives, MCU pin 7 will recognize that the high level changes to a low level, and the second trigger signal is obtained.

[0018] Preferably, the ignition signal output circuit of the igniter includes a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C8, a diode D6, a diode D7, a diode D8, a transistor Q4, a transistor Q5, a transistor Q6, a motor power line J1, a high-voltage coil connection J3 and a grounding line J4. The resistor R12, the cathode of the diode D6, the collector of the transistor Q4 and the collector of the transistor Q6 are all connected to the high-voltage coil connection J3, the capacitor D8 is grounded and connected to the grounding line J4, the cathode of the diode D7 is connected to the motor power line J1, and the base of the transistor Q6 is connected to the emitter of the transistor Q4. The base of Q4 is connected to the cathode of diode D8, the anode of diode D8 is connected to one end of resistor R13, one end of resistor R13 is connected to the emitter of transistor Q5, the collector of transistor Q5 is connected to one end of resistor R15, the base of transistor Q5 is connected to one end of resistor R14, and one end of resistor R14 is connected to pin 2 of MCU; MCU pin 2 outputs a high level when there is no action. At this time, according to the circuit diagram, transistors Q4, Q5, and Q6 are all turned on, and the charging wave on the motor power line J1 passes through transistor Q6 to the boost coil J3 to form a loop. When MCU detects the trigger signal and is ready to output the ignition signal, MCU first outputs a low level through pin 2, turning off transistor Q5 and correspondingly turning off transistors Q4 and Q6, so that the charging wave is temporarily stored on electrolytic capacitor C8. After a short delay, the MCU first outputs a high level through pin 2, and transistors Q4, Q5, and Q6 are turned on again. The energy stored in the electrolytic capacitor C8 is released instantly, and ignition is completed through the boost coil.

Claims

1. A high-precision digital ignition device for a generator, comprising a high-voltage cap, a high-voltage line connected to the high-voltage cap, a trigger, a control circuit, a housing, a trigger signal line matched with the trigger, a stator motor, a motor power line matched with the stator motor, a grounding line connected to the stator motor, an iron core, an epoxy material arranged in the housing and a boost coil group, characterized in that: The control circuit includes an MCU, an MCU power supply circuit, an igniter trigger signal acquisition circuit, an ignition signal output circuit, an igniter flameout signal acquisition circuit, an oil cut protection signal input circuit and an oil warning light output circuit; The ignition signal output circuit includes a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C8, a diode D6, a diode D7, a diode D8, a transistor Q4, a transistor Q5, a transistor Q6, a motor power line J1, a high-voltage coil connection J3 and a grounding line J4. One end of the resistor R12, the cathode of the diode D6, the collector of the transistor Q4 and the collector of the transistor Q6 are all connected to the high-voltage coil connection J3. One end of the capacitor C8 is grounded and connected to the grounding line J4. The other end of the capacitor C8 is connected to the other end of the resistor R12, the cathode of the diode D6, the collector of the transistor Q4 and the collector of the transistor Q6. The positive electrode of transistor D6, the emitter of transistor Q6, and the positive electrode of diode D7 are connected, the negative electrode of diode D7 is connected to the motor power line J1, the base of transistor Q6 is connected to the emitter of transistor Q4; the base of Q4 is connected to the negative electrode of diode D8, the positive electrode of diode D8 is connected to one end of resistor R13, the other end of resistor R13 is connected to the emitter of transistor Q5, the collector of transistor Q5 is connected to one end of resistor R15, the base of transistor Q5 is connected to one end of resistor R14, the other end of resistor R14 and the other end of resistor R15 are connected to MCU.

2. A high-precision digital ignition device for a generator according to claim 1, characterized in that: The MCU power supply circuit includes a resistor R1, a resistor R2, a capacitor C1, a capacitor C2, a diode D1, a voltage regulator D2, a transistor Q1 and a motor power line J1. One end of the diode D1 is connected to one end of the resistors R1 and R2, and the other end is connected to the motor power line J1. The other end of the resistor R1 is connected to the collector of the transistor Q1, and the other end of the resistor R2 is connected to the base of the transistor Q1, the negative electrode of the voltage regulator D2 and one end of the capacitor C1. The other end of the capacitor C1 is grounded to the positive electrode of the voltage regulator D2, and the emitter of the transistor Q1 is connected to the positive electrode of the electrolytic capacitor C2.

3. A high-precision digital ignition device for a generator according to claim 1, characterized in that: The igniter trigger signal acquisition circuit includes a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a diode D3, a diode D4, a diode D5, a transistor Q2, a transistor Q3 and a trigger signal line J2, one end of the trigger signal line J2 is connected to one end of the resistor R3, the resistor R4 and the resistor R5, the other ends of the resistor R3, the resistor R4 and the resistor R5 are connected to one end of the capacitor C3, the positive electrode of the diode D3, and the positive electrode of the capacitor C4, the positive electrode of the capacitor C4 is connected to the negative electrode of the capacitor C5, the other end of the capacitor C3 is grounded, the negative electrode of the diode D3 is connected to the negative electrode of the diode D4, and the positive electrode of the diode D4 is grounded, The negative electrode of capacitor C4 is connected to one end of resistor R6 and the base of transistor Q2, the other end of resistor R6 is connected to one end of resistor R7, the emitter of transistor Q2 is grounded, the collector of transistor Q2 is connected to one end of resistor R8 and resistor R9, the other end of resistor R8 is connected to the power supply VCC, the other end of resistor R9 is connected to MCU and one end of capacitor C6, the other end of capacitor C6 is grounded, the positive electrode of capacitor C5 is connected to the other end of resistor R7 and the negative electrode of diode D5, the positive electrode of diode D5 is connected to the emitter of transistor Q3, the collector of transistor Q3 is connected to one end of resistor R10 and resistor R11, the other end of resistor R10 is connected to the power supply VCC, the other end of resistor R11 is connected to MCU and one end of capacitor C7, and the other end of capacitor C7 is grounded.

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