Direct current control circuit integrated with ignition function
By integrating the DC control circuit with the ignition function into the generator set, the problems of large space occupation and complex processing of the ignition winding are solved, realizing efficient power generation and stable operation of the generator set, and reducing production costs and electromagnetic interference.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING YUXIN PINGRUI ELECTRONICS
- Filing Date
- 2025-03-31
- Publication Date
- 2026-04-28
AI Technical Summary
The ignition winding in existing generator sets occupies a large space, is complex to manufacture, and electromagnetic interference reduces output efficiency, resulting in problems such as increased generator set size and high production costs.
By directly integrating the high-voltage coil of the igniter onto the engine and improving the control circuit, the electrical energy generated by the generator can directly drive the igniter, eliminating the ignition winding in the generator. Through the combination of a rectifier bridge, an isolation voltage divider unit, and an ignition circuit unit, efficient use of electrical energy and simplified circuit design are achieved.
It improves the generator's power generation efficiency, reduces production costs, simplifies processing, enhances the generator's integration and energy utilization, and makes the generator set operate more smoothly.
Smart Images
Figure CN224178096U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of generator control technology, specifically to a DC control circuit with integrated ignition function. Background Technology
[0002] Automotive alternator sets come in many varieties. As devices that efficiently convert mechanical energy into electrical energy, they play an indispensable role in vehicle operation. Currently, most mainstream alternator sets are 24V DC output generators, which use gasoline or diesel engines as power sources to provide mechanical energy to the generator and then convert it into electrical energy to charge the vehicle's power supply or power on-board electrical appliances. These on-board electrical appliances include ignition systems, controllers, lighting circuits, and other electronic equipment.
[0003] For existing generator sets, the igniter needs to boost the DC current generated by the battery or generator through circuit components such as a high-voltage transformer before ignition can be performed. In order to simplify the circuit and start the generator set, the method adopted is to set up an output winding and an ignition winding in the generator. The two windings share the magnetic circuit and structure. The ignition winding provides power to the igniter to assist in starting during startup.
[0004] This method of generator set has drawbacks. If an output winding and an ignition winding are set in a generator, the ignition winding occupies the space of the output winding. The two windings are wound separately, which is difficult to process and will also increase the size of the generator. It will also make the wiring installation and connection inside the generator more complicated. The electromagnetic interference generated will directly reduce the output efficiency of the main output winding. Utility Model Content
[0005] I. Technical problems to be solved
[0006] This invention addresses the shortcomings of existing technologies by proposing a DC power generation system with integrated ignition function. The high-voltage transformer of the igniter is directly integrated into the engine. Through improvements to the control circuit, the electrical energy generated by the generator directly drives the igniter, eliminating the need for the ignition winding in the generator, thus improving the generator's power generation efficiency and reducing its production cost.
[0007] II. Specific Technical Solutions
[0008] A DC control circuit with integrated ignition function includes a generator and an engine. The engine integrates a high-voltage transformer. The output terminal of the engine is connected to the input terminal of the generator. The output terminal of the generator is connected to a rectifier bridge unit. The output terminal of the rectifier bridge unit is connected to an isolation voltage divider unit. The isolation voltage divider unit is used to step down and divide the DC power output by the rectifier bridge unit. The isolation voltage divider unit includes at least one output terminal. One output terminal of the isolation voltage divider unit is electrically connected to an ignition circuit unit. The output terminal of the ignition circuit unit is electrically connected to the high-voltage transformer.
[0009] Implementation principle and working principle:
[0010] This solution eliminates the ignition winding in the generator, reducing the space occupied by the winding and thus facilitating a smaller generator size. It also improves the generator's integration and space utilization. Since the ignition circuit unit is integrated into the control circuit module, and the ignition coil of the igniter is integrated into the engine, both are wired externally, effectively reducing manufacturing difficulty and improving production efficiency. Furthermore, the isolation voltage divider unit can step down and divide the output of the rectifier bridge unit to power different electrical appliances, including the ignition circuit unit, resulting in higher energy utilization and lower circuit design complexity.
[0011] Preferably, the other end of the rectifier bridge unit is also connected to a storage battery, and the storage battery and the isolation voltage divider unit are connected in parallel at the output end of the rectifier bridge unit. The advantage of this preferred option is that the parallel-connected storage battery can not only store the excess electrical energy generated, but also directly supply power to the ignition unit through the isolation voltage divider unit during startup.
[0012] Preferably, the isolation voltage divider unit includes a current-mode controller U3 and a resistor R2. The first branch of the second end of the resistor R2 is connected to the VCC terminal of the current-mode controller U3, and the second branch of the second end of the resistor R2 is connected to the positive terminal of the polarized capacitor C10. The negative terminal of the polarized capacitor C10 is grounded, and a non-polarized capacitor C9 is connected in parallel across the polarized capacitor C10. The Out terminal of the current-mode controller U3 is connected to the gate terminal of the MOSFET T2 after being connected in series with a resistor R5. The drain terminal of the MOSFET T2 is grounded after being connected in series with a resistor R11. The source terminal of the MOSFET T2 is connected to the negative terminal of the input terminal of the dual-output transformer. The positive terminal of the input terminal of the dual-output transformer is connected to the first end of the resistor R2 and then to the output terminal of the rectifier bridge unit. The beneficial effect of this preferred configuration is that this isolation voltage divider unit can convert a portion of the DC power output from the generator into AC power, which is then output through the internal dual-output transformer. The dual-output transformer can step up or step down the voltage, converting the input voltage into two different outputs, thereby facilitating the supply of power to appliances with different parameter requirements.
[0013] Preferably, a resistor R1 is connected to the positive terminal of the dual-output transformer input, and the other end of the resistor R1 is connected to the negative terminal of the diode D5. The positive terminal of the diode D5 is connected to the negative terminal of the dual-output transformer input. A capacitor C2 is also connected in parallel across the resistor R1. The advantage of this preferred embodiment is that, through the arrangement of the resistor R1, capacitor C2, and diode D5, the voltage at the input terminal of the dual-output transformer can be stabilized. At the same time, the diode D5 can further ensure its safety.
[0014] Preferably, the positive terminal of the first output terminal of the dual-output transformer is connected to the positive terminal of diode D4, the first branch of the negative terminal of diode D4 is connected to the input terminal of the ignition circuit unit and provides it with a first DC input; the second branch of the negative terminal of diode D4 is connected to the input terminal of the DC step-down submodule U1, and the output terminal of the DC step-down submodule U1 provides a first DC output.
[0015] Preferably, the ignition circuit unit includes an optocoupler U10 and a microcontroller. The positive terminal of the light-emitting side of the optocoupler U10 is connected to the ignition signal input terminal through a resistor R48. The microcontroller provides an ignition signal to the ignition signal input terminal. The negative terminal of the light-emitting side of the optocoupler U10 is grounded. The collector of the photosensitive side of the optocoupler is connected to the first branch of the negative terminal of diode D4 after being connected to a resistor R49. The emitter of the photosensitive side of the optocoupler U10 is connected to the base (B) of transistor Q17, and the collector (C) of transistor Q17 is connected to the first branch of the negative terminal of diode D4. The first branch of the negative terminal of diode D4 is also connected to a high voltage... The first coil of the high-voltage transformer is connected; the emitter of transistor Q17 is connected to the first end of resistor R57 and the drain of MOSFET Q18 through resistor R54; the drain of MOSFET Q18 is connected to the second coil of the high-voltage transformer, and the source of MOSFET Q18 is connected to the second end of resistor R57 and then grounded; the beneficial effect of this preferred embodiment is that when the microcontroller provides the ignition signal, the light-emitting side of optocoupler U10 emits light, and its photosensitive side conducts, which also makes transistor Q17 conduct and MOSFET Q18 conduct at the same time, thereby continuously igniting the primary coil of the high-voltage transformer to achieve high voltage output and ignite different cylinders of the engine.
[0016] Preferably, a capacitor C34 is also connected to the drain of the MOSFET Q18, and the other end of the capacitor C34 is connected to the second end of the resistor R57.
[0017] Preferably, the output terminal of the DC-DC step-down submodule U1 is connected to a trigger detection unit, which includes a resistor R23 and an optocoupler U4. The first end of the resistor R23 is connected to the output terminal of the DC-DC step-down submodule U1, and the second end of the resistor R23 is connected to the positive terminal of the light-emitting side of the optocoupler U4. The negative terminal of the light-emitting side of the optocoupler U4 is connected to the C terminal of the transistor Q9. The B terminal of the transistor Q9 is connected to the negative terminal of the diode D16 through a resistor R41. A capacitor C25 is connected in parallel across the two ends of the resistor R41. The positive terminal of the diode D16 is connected to a speed sensor through a resistor R42. The speed sensor is used to detect the speed of the generator. The E terminal of the transistor Q9 is grounded. The C terminal of the photosensitive side of the optocoupler U4 is connected to the output terminal of the DC-DC step-down submodule U2 through a resistor R22. A resistor R24 is connected between the optocoupler U4 and the resistor R22 through a branch. The other end of the resistor R24 is connected to the trigger signal input terminal of the microcontroller.
[0018] The beneficial effects of this utility model are as follows:
[0019] This design eliminates the generator windings in the generator, reducing the space occupied by the windings, which helps to shrink the generator size and improves the integration and space utilization of the generator. Since the ignition circuit unit is integrated into the control circuit, and the ignition coil of the igniter is integrated into the engine, both are wired externally, effectively reducing manufacturing difficulty and improving production efficiency. Part of the electrical energy generated by the generator is stored in the battery or directly output, while the other part is separated by an isolation voltage divider unit to power the microcontroller and ignition circuit unit, resulting in higher energy utilization and lower circuit design complexity. The microcontroller, through the coordination of the trigger detection unit and the ignition circuit unit, synchronizes the ignition position and frequency with the engine operation, making the generator set operate more smoothly. Attached Figure Description
[0020] Figure 1 This is a logic diagram of the DC control circuit that integrates the ignition function of this utility model.
[0021] Figure 2 This is a schematic diagram showing the connection of the generator output terminal of the DC control circuit with integrated ignition function of this utility model.
[0022] Figure 3 This is a circuit diagram of the isolation voltage divider unit of the DC control circuit that integrates ignition function in this utility model.
[0023] Figure 4 This is a circuit diagram of the ignition circuit unit of the DC control circuit that integrates ignition function in this utility model.
[0024] Figure 5This is a circuit diagram of the trigger detection unit of the DC control circuit that integrates ignition function in this utility model.
[0025] 1. Rectifier bridge unit; 2. Isolation voltage divider unit; 3. Ignition circuit unit; 4. Battery; 5. Trigger detection unit. Detailed Implementation
[0026] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0027] like Figure 1-5 As shown:
[0028] A DC power generation system with integrated ignition function includes an engine and a generator. The output end of the engine is connected to the input end of the generator. It is common knowledge for those skilled in the art that the engine drives the generator, and will not be described in detail here. Specifically, a high-voltage transformer is integrated on the engine. In this embodiment, the high-voltage transformer is a TJ113C type high-voltage transformer. The output end of the generator is connected to the control circuit module through a rectifier bridge unit. The connection between the rectifier bridge unit and the generator is shown in the figure.
[0029] The output terminals of rectifier bridge unit 1 are connected to battery 4 and isolation voltage divider unit 2, respectively. Battery 4 can store the DC current flowing out of the output terminal of rectifier bridge unit 1 and can also power the isolation voltage divider unit 2. In implementation, the isolation voltage divider unit 2 includes a current-mode controller U3 and a resistor R2. The current-mode controller U3 is specifically a UC3843 type PWM current-mode controller. The first branch of the second terminal of resistor R2 is connected to the VCC terminal of the current-mode controller U3. Resistor R2 can play a voltage divider protection role. The second branch of the second terminal of resistor R2... The circuit is connected to the positive terminal of the polarized capacitor C10, and the negative terminal of the polarized capacitor C10 is grounded. A non-polarized capacitor C9 is also connected in parallel across the polarized capacitor C10. This parallel capacitor bank effectively filters the input electrical signal, ensuring a stable output from the current-mode controller U3. The output terminal of the current-mode controller U3 is connected to the gate (G) of the MOSFET T2 after a series resistor R5, allowing it to output pulses and control the switching on and off of the MOSFET T2, thus converting the input DC to AC output. The connections of the other terminals of the current-mode controller U3 are common knowledge. This will not be described in detail. The drain (D) of MOSFET T2 is connected to ground via a series resistor R11. The source (S) of MOSFET T2 is connected to the negative terminal of the input of the dual-output transformer. The positive terminal of the input of the dual-output transformer is connected to the first end of resistor R2 and then to the positive terminal of the rectifier bridge unit. In this scheme, the DC power entering the isolation voltage divider unit 2 can be converted into AC power, which is then output through the dual-output transformer. The dual-output transformer can perform either step-up or step-down functions, and can adjust the input voltage of the dual-output transformer. The voltage is converted into two AC voltage outputs with different parameters to meet the power supply needs of appliances with more different parameter requirements. A resistor R1 is also connected to the positive terminal of the input terminal of the dual output transformer. The other end of the resistor R1 is connected to the negative terminal of the diode D5, and the positive terminal of the diode D5 is connected to the negative terminal of the input terminal of the dual output transformer. A capacitor C2 is also connected in parallel across the two ends of the resistor R1. Through the arrangement of resistor R1, capacitor C2, and diode D5, the voltage at the input terminal of the dual output transformer can be stabilized. At the same time, diode D5 can further ensure circuit safety.
[0030] In implementation, the positive terminal of the first output of the dual-output transformer is connected to the positive terminal of diode D4. Diode D4 converts the AC power at the first output terminal into DC power. The first branch of the negative terminal of diode D4 is connected to the ignition circuit unit 3, providing it with a first DC input voltage of 20V. The second branch of the negative terminal of diode D4 is connected to the input terminal of the DC-DC step-down submodule U1. The output terminal of the DC-DC step-down submodule U1 provides a first DC output voltage of 5V. Furthermore, there is a connection between the DC-DC step-down submodule U1 and diode D4. A non-polarized capacitor C6 and a polarized capacitor C4+ are connected in parallel through two branches (the positive terminal of C4 is connected to the negative terminal of diode D4). These two capacitors effectively decouple and filter, ensuring a stable 20V DC output. The positive terminal of the second output of the dual-output transformer is connected to the positive terminal of diode D9. Diode D9 converts the AC input from the transformer into DC. The first branch, connected to the negative terminal of diode D9, provides the second DC output, i.e., a 12V DC output. To ensure the stability of this second DC output... The second DC output is additionally connected in parallel through three branches, each with a polarized capacitor C14, a non-polarized capacitor C15, and resistors R6 and R9 connected in series. The other ends of these three branches are all grounded. Because this second output needs to power the microcontroller U9, two additional resistors are added to reduce oscillation and further improve the stability of the output voltage. The microcontroller U9 is specifically a single-chip microcontroller. The second branch, with the negative terminal of diode D9, is connected to the input terminal of the DC-DC step-down submodule U2. The output terminal of the DC-DC step-down submodule U2 provides a second current input to the microcontroller U9. The other end of this second current input is connected through... The two branches are connected in parallel with polarized capacitor C3 and non-polarized capacitor C5, which further stabilizes the 3.3V voltage input of microcontroller U9. Specifically, by setting up diodes D4 and D9, the AC power from the two output terminals of the dual-output transformer can be converted into DC power. Then, through the DC step-down sub-modules U1 and U2 integrated at the two output terminals of the dual-output transformer, the two DC outputs can be converted into four or more DC outputs of different values, which can power more electrical appliances. While improving the circuit integration, the power supply range is wider and the circuit is simpler.
[0031] In implementation, the ignition circuit unit includes an optocoupler U10. The positive terminal of the light-emitting side of the optocoupler U10 is connected to the ignition signal input terminal through a resistor R48. The signal at the ignition signal input terminal is provided by the microcontroller. The negative terminal of the light-emitting side of the optocoupler U10 is grounded. When the ignition voltage signal enters the light-emitting side of the optocoupler U10, the light-emitting side emits light. The collector of the photosensitive side of the optocoupler U10 is connected to the first branch of the negative terminal of diode D4 after being connected to a resistor R49. The emitter of the photosensitive side of the optocoupler U10 is connected to the base (B) of transistor Q17, and the collector (C) of transistor Q17 is connected to the first branch of the negative terminal of diode D4. The negative terminal of diode D4... The first branch is also connected to the first coil of the high-voltage transformer; the emitter of transistor Q17 is connected to the first end of resistor R57 and the drain of MOSFET Q18 through resistor R54; the drain of MOSFET Q18 is connected to the second coil of the high-voltage transformer, and the source of MOSFET Q18 is connected to the second end of resistor R57 and then grounded; when the microcontroller provides the ignition signal, the light-emitting side of optocoupler U10 emits light, and its photosensitive side conducts, which also makes transistor Q17 conduct and MOSFET Q18 conduct at the same time. According to the output frequency of the ignition signal, the primary coil of the high-voltage transformer can be continuously controlled to discharge, so as to realize high voltage output and ignite different cylinders of the engine.
[0032] In implementation, the output terminal of the DC-DC step-down submodule U1 is connected to a trigger detection unit 5. The trigger detection unit 5 includes a resistor R23 and an optocoupler U4. The first end of the resistor R23 is connected to the output terminal of the DC-DC step-down submodule U1, and the second end of the resistor R23 is connected to the positive terminal of the light-emitting side of the optocoupler U4. The negative terminal of the light-emitting side of the optocoupler U4 is connected to the C terminal of the transistor Q9. The B terminal of the transistor Q9 is connected to the negative terminal of the diode D16 through a resistor R41. A capacitor C25 is connected in parallel across the two ends of the resistor R41. The positive terminal of the diode D16 is connected to a speed sensor through a resistor. The speed sensor is used to detect the generator speed. The E terminal of the transistor Q9 is grounded. The C terminal of the photosensitive side of optocoupler U4 is connected to the output terminal of DC step-down submodule U2 through resistor R22. Resistor R24 is connected between optocoupler U4 and resistor R22 through a branch line. The other end of resistor R24 is connected to the trigger signal input terminal of microcontroller U9. The trigger detection unit 5 is set so that the transistor Q9 is turned on by the trigger signal emitted by the speed sensor, which in turn turns on the light-emitting side of optocoupler U4, so that the photosensitive side is energized. Microcontroller U9 controls the ignition of the igniter according to the trigger signal or electrical signal on the photosensitive side, realizing feedback so that the speed of generator or engine is synchronized with the ignition speed, so that the generator runs smoothly.
[0033] In this design, the generator windings are eliminated, reducing the space occupied by the windings and thus minimizing the generator's size. This also improves the generator's integration and space utilization. The ignition circuit unit is integrated into the circuit, while the igniter's high-voltage coil is integrated into the engine, with wiring done externally. This effectively reduces manufacturing difficulty and increases production efficiency. Part of the electrical energy generated by the generator is stored in the battery or directly output, while the other part is separated by an isolation voltage divider unit to power the microcontroller U9 and the ignition circuit unit. This results in higher energy utilization and lower circuit design complexity. The microcontroller U9, through the coordination of the trigger detection unit and the ignition circuit unit, synchronizes the ignition position and frequency with the engine operation, making the generator set operate more smoothly.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims.
Claims
1. A DC control circuit integrating ignition function, comprising a generator and an engine, characterized in that: The engine integrates a high-voltage transformer. The output terminal of the engine is connected to the input terminal of the generator. The output terminal of the generator is connected to a rectifier bridge unit. The output terminal of the rectifier bridge unit is connected to an isolation voltage divider unit. The isolation voltage divider unit is used to step down and divide the DC power output by the rectifier bridge unit. The isolation voltage divider unit includes at least one output terminal. One output terminal of the isolation voltage divider unit is electrically connected to an ignition circuit unit. The output terminal of the ignition circuit unit is electrically connected to the high-voltage transformer.
2. The DC control circuit with integrated ignition function according to claim 1, characterized in that: The output terminal of the rectifier bridge unit is also connected to a storage battery, and the storage battery and the isolation voltage divider unit are connected in parallel to the output terminal of the rectifier bridge unit.
3. The DC control circuit with integrated ignition function according to claim 2, characterized in that: The isolation voltage divider unit includes a current-mode controller U3 and a resistor R2. The first branch of the second terminal of resistor R2 is connected to the V voltage of the current-mode controller U3. CC The second branch of the second end of resistor R2 is connected to the positive terminal of the polarized capacitor C10, and the negative terminal of the polarized capacitor C10 is grounded. A non-polarized capacitor C9 is also connected in parallel across the polarized capacitor C10. The Out terminal of the current mode controller U3 is connected to the gate of MOSFET T2 after series resistor R5. The drain of MOSFET T2 is grounded after series resistor R11. The source of MOSFET T2 is connected to the negative terminal of the input terminal of the dual output transformer. The positive terminal of the input terminal of the dual output transformer is connected to the first end of resistor R2 and then to the output terminal of the rectifier bridge unit.
4. The DC control circuit with integrated ignition function according to claim 3, characterized in that: A resistor R1 is connected to the positive terminal of the input of the dual-output transformer. The other end of the resistor R1 is connected to the negative terminal of the diode D5, and the positive terminal of the diode D5 is connected to the negative terminal of the input of the dual-output transformer. A capacitor C2 is also connected in parallel across the two ends of the resistor R1.
5. The DC control circuit with integrated ignition function according to claim 3, characterized in that: The positive terminal of the first output of the dual-output transformer is connected to the positive terminal of diode D4. The first branch of the negative terminal of diode D4 is connected to the input terminal of the ignition circuit unit and provides it with the first DC input. The second branch of the negative terminal of diode D4 is connected to the input terminal of the DC step-down submodule U1, and the output terminal of the DC step-down submodule U1 provides the first DC output.
6. The DC control circuit with integrated ignition function according to claim 3, characterized in that: The ignition circuit unit includes an optocoupler U10 and a microcontroller U9. The positive terminal of the light-emitting side of the optocoupler U10 is connected to the ignition signal input terminal through a resistor R48. The microcontroller U9 provides the ignition signal to the ignition signal input terminal. The negative terminal of the light-emitting side of the optocoupler U10 is grounded. The collector of the photosensitive side of the optocoupler is connected to the first branch of the negative terminal of diode D4 after being connected to a resistor R49. The emitter of the photosensitive side of the optocoupler U10 is connected to the base (B) of transistor Q17, and the collector (C) of transistor Q17 is connected to the first branch of the negative terminal of diode D4. The first branch of the negative terminal of diode D4 is also connected to the first coil of the high-voltage transformer. The emitter (E) of transistor Q17 is connected to the first terminal of resistor R57 and the drain (D) of MOSFET Q18 through a resistor R54. The drain (D) of MOSFET Q18 is connected to the second coil of the high-voltage transformer, and the source (S) of MOSFET Q18 is connected to the second terminal of resistor R57 and then grounded.
7. The DC control circuit with integrated ignition function according to claim 6, characterized in that: A capacitor C34 is also connected to the drain of the MOSFET Q18, and the other end of the capacitor C34 is connected to the second end of the resistor R57.
8. The DC control circuit with integrated ignition function according to claim 6, characterized in that: The output of the DC-DC step-down submodule U1 is connected to a trigger detection unit, which includes a resistor R23 and an optocoupler U4. The first end of the resistor R23 is connected to the output of the DC-DC step-down submodule U1, and the second end of the resistor R23 is connected to the positive terminal of the light-emitting side of the optocoupler U4. The negative terminal of the light-emitting side of the optocoupler U4 is connected to the C terminal of the transistor Q9. The B terminal of the transistor Q9 is connected to the negative terminal of the diode D16 through a resistor R41. A capacitor C25 is connected in parallel across the two ends of the resistor R41. The positive terminal of the diode D16 is connected to a speed sensor through a resistor R42. The speed sensor is used to detect the generator speed. The E terminal of the transistor Q9 is grounded. The C terminal of the photosensitive side of the optocoupler U4 is connected to the output of the DC-DC step-down submodule U2 through a resistor R22. A resistor R24 is connected between the optocoupler U4 and the resistor R22 through a branch. The other end of the resistor R24 is connected to the trigger signal input terminal of the microcontroller.