Electronic trigger
By adopting high-voltage trigger circuits and self-excitation charging circuits in electronic triggers, the damage problems of existing electronic triggers' large volume and high voltage to the control system are solved, and a smaller volume and safer high-voltage circuit is realized.
Patent Information
- Application Number
- CN202421798928.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-07-29
AI Technical Summary
Existing electronic triggers are large in size due to complex internal circuits and triggering high voltages may cause damage to the devices in the control system.
An electronic trigger is designed, adopting a high-voltage trigger circuit, including a high-voltage trigger transformer, a communication capacitor, a signal extraction unit, a trigger amplifier unit and a driving unit. The high-voltage circuit isolates the high-voltage circuit from the control system through a communication capacitor to avoid damage to the control device by high voltage, and simplifies the power circuit through a self-excitation oscillation charging circuit and reduces the volume.
It effectively avoids damage to the control device by high voltage, and reduces the volume of the electronic trigger by simplifying the circuit structure.
Smart Images
Figure CN222897348U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of triggers, in particular to an electronic trigger. Background Art
[0002] The working principle of the electronic trigger is to apply the high-frequency high voltage generated by the trigger to the two ends of the bulb electrode and generate high-frequency breakdown between the two electrodes, so that the inert gas or metal halide in the lamp tube is ionized and discharged. At the same time, the high-frequency current that breaks through the lamp tube heats the electrode, causing the surface of the electrode to heat up and generate the emission of thermal electrons. If the high-frequency current is large enough and stable, the lamp tube can be ignited.
[0003] In order to reduce the loop loss of the triggering high voltage and reduce the interference during the triggering, the trigger needs to be placed in a box. At present, the trigger is large in size due to the complexity of the internal circuit (such as the oscillation generating circuit, etc.). In addition, once the triggering high voltage of the electronic trigger is connected to the control system, the control device may be damaged. Utility Model Content
[0004] In view of this, the problem to be solved by the present invention is to provide an electronic trigger.
[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0006] An electronic trigger includes a high-voltage trigger circuit, the high-voltage trigger circuit includes a high-voltage trigger transformer, the high-voltage trigger transformer is used to generate a trigger high voltage to trigger a xenon lamp, the primary and secondary sides of the high-voltage trigger transformer are both connected to a communication capacitor, the communication capacitor is connected to a pulse high-voltage ground terminal, the communication capacitor is used to connect the trigger high voltage in series to an external control system, and the external control system will return to the pulse high-voltage ground terminal through the communication capacitor.
[0007] Furthermore, the high-voltage trigger circuit includes a signal extraction unit and a trigger amplification unit, the input end of the signal extraction unit is electrically connected to the trigger signal end, the output end of the signal extraction unit is connected to the input end of the trigger amplification unit, the signal extraction unit is used to extract the leading edge of the trigger signal end, and the trigger amplification unit is used to amplify the extracted trigger signal.
[0008] Furthermore, the high-voltage trigger circuit also includes a driving unit, the output end of the trigger amplifying unit is connected to the input end of the driving unit, the output end of the driving unit is connected to the primary side of the high-voltage trigger transformer, and the driving unit is used to receive the signal of the trigger amplifying unit and excite the primary side of the high-voltage trigger transformer.
[0009] Specifically, the extraction unit includes a fourth capacitor, the trigger amplification unit includes a trigger transistor, and the base of the trigger transistor is electrically connected to the trigger signal end via the fourth capacitor.
[0010] Specifically, the driving unit includes a MOS tube, a gate of the MOS tube is connected to the collector of the trigger transistor via a first resistor, and a source of the MOS tube is grounded.
[0011] In the utility model, the electronic trigger also includes a self-excited oscillation charging circuit, the self-excited oscillation charging circuit is connected to a charging capacitor, the charging capacitor is connected to the high-voltage trigger circuit, and the self-excited oscillation charging circuit is used to generate high-frequency oscillations to charge the charging capacitor.
[0012] Furthermore, the self-excited oscillation charging circuit includes a first transformer, a primary side of the first transformer is connected to a transistor, and a secondary side of the first transformer is connected to a feedback unit.
[0013] Specifically, the feedback unit includes a fifth resistor, the fifth resistor is connected to one end of a seventh capacitor, the other end of the seventh capacitor is connected to the collector of the transistor, the collector of the transistor is connected to one end of a second diode, and the other end of the second diode is grounded.
[0014] Specifically, the secondary side of the first transformer is connected to one end of a first diode, the other end of the first diode is connected to a third resistor, and the third resistor is connected to the high-voltage trigger circuit.
[0015] Specifically, the high-voltage trigger circuit further includes a light emitting diode, and the light emitting diode is connected to the third resistor via an eighth resistor.
[0016] The advantages and positive effects of the utility model are:
[0017] (1) By adding AC capacitors to the primary and secondary sides of the high-voltage trigger transformer, high voltage is prevented from entering the control system and damaging the control components.
[0018] (2) By adopting a self-excited oscillation circuit, the current amplification function of the transistor and the voltage feedback function of the first transformer are utilized to increase the internal current of the transistor by positive feedback, generate high-frequency oscillation, drive the first transformer, and charge the capacitor through high-frequency rectification. This circuit simplifies the power circuit and is conducive to reducing the size of the trigger box. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0020] Figure 1 This is an overall structural diagram of an electronic trigger of the utility model;
[0021] Figure 2 It is the general circuit diagram of an electronic trigger of the utility model;
[0022] Figure 3 It is a circuit diagram of a self-excited oscillation charging circuit in an electronic trigger of the utility model;
[0023] Figure 4 It is a circuit diagram of a high voltage trigger circuit in an electronic trigger of the utility model;
[0024] In the figure: 1-high voltage trigger circuit; 11-trigger signal terminal; 12-pulse high voltage terminal; 13-pulse high voltage ground terminal; 14-signal extraction unit; 15-signal amplification unit; 16-driving unit; 2-self-excited oscillation charging circuit; 21-feedback unit. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0028] like Figure 1 to Figure 2As shown, the utility model provides an electronic trigger, including a high-voltage trigger circuit 1, the high-voltage trigger circuit 1 includes a high-voltage trigger transformer T2, the pulse high-voltage end 12 of the high-voltage trigger transformer T2 is used to generate a trigger high voltage to trigger the xenon lamp, the primary and secondary sides of the high-voltage trigger transformer T2 are connected to the communication capacitor C1, the communication capacitor C1 is connected to the pulse high-voltage ground end 13, the communication capacitor C1 is used when the trigger high voltage is connected in series to the external control system, and the external control system will return to the pulse high-voltage ground end 13 through the communication capacitor C1. In this way, this solution communicates the primary and secondary sides of the high-voltage transformer by adding the communication capacitor C1, so that once the trigger high voltage is connected in series to the control part, it will return to the pulse high-voltage ground end 13 through the communication capacitor C1, avoiding damage to the control device by the high voltage.
[0029] Furthermore, the high-voltage trigger circuit includes a signal extraction unit 14, a trigger amplification unit 15, and a drive unit 16. The input end of the signal extraction unit 14 is electrically connected to the trigger signal end 11, and the output end of the signal extraction unit 14 is connected to the input end of the trigger amplification unit 15. The signal extraction unit 14 is used to extract the leading edge of the trigger signal end 11, and the trigger amplification unit 15 is used to amplify the extracted trigger signal. The output end of the trigger amplification unit 15 is connected to the input end 16 of the drive unit, and the output end of the drive unit 16 is connected to the primary side of the high-voltage trigger transformer T2. The drive unit 16 is used to receive the signal of the trigger amplification unit 15 and excite the primary side of the high-voltage trigger transformer T2.
[0030] Specifically, Figure 4 As shown, the extraction unit 14 includes a fourth capacitor C4, and the trigger amplification unit 15 includes a trigger transistor U2, and the base of the trigger transistor U2 is electrically connected to the trigger signal terminal 11 via the fourth capacitor C4. The emitter of the trigger transistor U2 is connected to one end of the sixth resistor R6, and the other end of the sixth resistor R6 is connected to the base of the trigger transistor U2. The driving unit 16 includes a MOS transistor U1, and the gate of the MOS transistor U1 is connected to the collector of the trigger transistor U2 via the first resistor R1, and the source of the MOS transistor U1 is grounded.
[0031] Furthermore, the high-voltage trigger circuit further includes a light-emitting diode D5, which is connected to a first node via an eighth resistor R8, the first node is connected to a third resistor R3, the first node is also connected to one end of a third capacitor C3, and the other end of the third capacitor C3 is connected to the pulse high voltage bottom 13 via a first diode D1. The input end of the trigger transformer T2 is connected to a node between the third capacitor C3 and the first diode D1.
[0032] Specifically, the trigger signal terminal 11 extracts the signal leading edge through the fourth capacitor C4, amplifies it through the trigger transistor U2, and then excites the primary side of the high-voltage trigger transformer T2 through the MOS tube U1. The secondary of the high-voltage trigger transformer T2, that is, the pulse high-voltage terminal 12, will generate a high voltage of 20KV to trigger the xenon lamp.
[0033] In the utility model, the electronic trigger also includes a self-excited oscillation charging circuit 2, the self-excited oscillation charging circuit 2 is connected to a charging capacitor C2, the charging capacitor C2 is connected to the high-voltage trigger circuit 1, and the self-excited oscillation charging circuit 2 is used to generate high-frequency oscillations to charge the charging capacitor C2.
[0034] Furthermore, the secondary side of the first transformer T1 is connected to one end of a first diode D1 , the other end of the first diode D1 is connected to a third resistor R3 , and the third resistor R3 is connected to the first node of the high-voltage trigger circuit.
[0035] Specifically, Figure 3 As shown, the self-excited oscillation charging circuit 2 includes a first transformer T1, the primary side of the first transformer T1 is connected to a transistor U4, the emitter of the transistor U4 is grounded through a second resistor R2, and the base of the transistor U4 is grounded through a second diode D2. The input end of the first transformer T1 is connected to the base of the transistor U4 through a seventh resistor R7.
[0036] The secondary side of the first transformer T1 is connected to a feedback unit 21. The feedback unit 21 comprises a fifth resistor R5, the fifth resistor R5 is connected to one end of a seventh capacitor C7, and the other end of the seventh capacitor C7 is connected to the base of the transistor U4.
[0037] This solution utilizes the current amplification function of the transistor U4 and the voltage feedback function of the first transformer T1, and makes the internal current of the transistor U4 increase by itself through positive feedback, generates high-frequency oscillation, drives the first transformer T1, and charges the charging capacitor C2 through high-frequency rectification. This part of the circuit omits the oscillation generating circuit, simplifies the power circuit, and is conducive to reducing the size of the trigger box.
[0038] refer to Figure 2 , the working principle of this scheme is:
[0039] This solution adopts a self-excited oscillation charging circuit, which uses the current amplification function of the transistor U4 and the voltage feedback function of the first transformer T1 to increase the internal current of the transistor U4 by itself through positive feedback, thereby generating high-frequency oscillation. When the transistor U4 is turned on, the current increases, and the first transformer T1 generates an induced electromotive force; when the transistor U4 is turned off, the current decreases, and the first transformer T1 generates a reverse induced electromotive force, which acts on the base of the transistor U4 through the feedback unit 21, so that the transistor U4 switches quickly between on and off, thereby generating high-frequency oscillation, thereby charging the charging capacitor C2.
[0040] The trigger signal terminal 11 is a negative pulse signal. The leading edge of the signal is first extracted through the fourth capacitor C4, and then the current is amplified through the trigger transistor U2. Then, the MOS tube U1 is driven to excite the primary side of the high-voltage trigger transformer T2. The secondary side of the high-voltage trigger transformer T2 generates a high voltage of 20KV to trigger the xenon lamp.
[0041] The above embodiments of the utility model are described in detail, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of the utility model should still fall within the scope of this patent.
Claims
1. An electronic trigger, characterized in that: The invention comprises a high-voltage trigger circuit (1), wherein the high-voltage trigger circuit (1) comprises a high-voltage trigger transformer (T2), wherein the high-voltage trigger transformer (T2) is used to generate a trigger high voltage to trigger a xenon lamp, wherein the primary side and the secondary side of the high-voltage trigger transformer (T2) are both connected to a communication capacitor (C1), wherein the communication capacitor (C1) is connected to a pulse high-voltage ground terminal (13), and wherein the communication capacitor (C1) is used to connect the trigger high voltage in series to an external control system, and the external control system returns to the pulse high-voltage ground terminal (13) through the communication capacitor (C1).
2. An electronic trigger according to claim 1, characterized in that: The high-voltage trigger circuit comprises a signal extraction unit (14) and a trigger amplification unit (15); the input end of the signal extraction unit (14) is electrically connected to the trigger signal end (11); the output end of the signal extraction unit (14) is connected to the input end of the trigger amplification unit (15); the signal extraction unit (14) is used to extract the leading edge of the trigger signal end (11); and the trigger amplification unit (15) is used to amplify the extracted trigger signal.
3. An electronic trigger according to claim 2, characterized in that: The high-voltage trigger circuit (1) further comprises a driving unit (16), the output end of the trigger amplifier unit (15) being connected to the input end of the driving unit (16), the output end of the driving unit (16) being connected to the primary side of the high-voltage trigger transformer (T2), and the driving unit (16) being used for receiving the signal of the trigger amplifier unit (15) and exciting the primary side of the high-voltage trigger transformer (T2).
4. An electronic trigger according to claim 3, characterized in that: The extraction unit (14) comprises a fourth capacitor (C4), the trigger amplification unit (15) comprises a trigger transistor (U2), and the base of the trigger transistor (U2) is electrically connected to the trigger signal end via the fourth capacitor (C4).
5. An electronic trigger according to claim 4, characterized in that: The driving unit (16) comprises a MOS tube (U1), the gate of the MOS tube (U1) is connected to the collector of the trigger transistor (U2) via a first resistor (R1), and the source of the MOS tube (U1) is grounded.
6. An electronic trigger according to any one of claims 1 to 5, characterized in that: The electronic trigger also includes a self-excited oscillation charging circuit (2), the self-excited oscillation charging circuit (2) is connected to a charging capacitor (C2), the charging capacitor (C2) is connected to the high-voltage trigger circuit (1), and the self-excited oscillation charging circuit (2) is used to generate high-frequency oscillation, thereby charging the charging capacitor (C2).
7. An electronic trigger according to claim 6, characterized in that: The self-excited oscillation charging circuit (2) comprises a first transformer (T1), the primary side of the first transformer (T1) is connected to a transistor (U4), and the secondary side of the first transformer (T1) is connected to a feedback unit (21).
8. An electronic trigger according to claim 7, characterized in that: The feedback unit (21) comprises a fifth resistor (R5), the fifth resistor (R5) is connected to one end of a seventh capacitor (C7), the other end of the seventh capacitor (C7) is connected to the collector of the transistor (U4), the collector of the transistor (U4) is connected to one end of a second diode (D2), and the other end of the second diode (D2) is grounded.
9. An electronic trigger according to claim 7, characterized in that: The secondary side of the first transformer (T1) is connected to one end of a first diode (D1), the other end of the first diode (D1) is connected to a third resistor (R3), and the third resistor (R3) is connected to the high-voltage trigger circuit.
10. An electronic trigger according to claim 9, characterized in that: The high-voltage trigger circuit also includes a light-emitting diode (D5), and the light-emitting diode (D5) is connected to the third resistor (R3) via an eighth resistor (R8).