Intelligent welding control circuit

Abstract

The utility model provides an intelligent welding control circuit, which relates to the technical field of power electronics and comprises a rectifier module, a filter module, an inverter module, a driving module, a protection module, a DA conversion module and a control module. The rectification module is connected with the filtering module, the filtering module is connected with the inversion module, the inversion module is respectively connected with the driving module and the protection module, the driving module is connected with the DA conversion module, and the DA conversion module is respectively connected with the protection module and the control module. And the control module is connected with the welding gun. According to the utility model, the welding efficiency is improved, the welding quality is ensured, the intelligent control is realized, and the safety is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of power electronics, especially to a welding intelligent control circuit. BACKGROUND

[0002] In the field of welding technology, traditional welding power supply control technology mainly focuses on the adjustment of power output parameters such as current, voltage, and pulse frequency, etc. to ensure the stability of heat input during welding. However, with the increasing demand for welding quality in industrial manufacturing, especially in high-end manufacturing fields such as nuclear power, shipbuilding, aerospace, etc., traditional welding power supply control technology has been difficult to meet the demand for efficient and accurate control of welding quality.

[0003] Specifically, the traditional welding power supply control system has the following main problems:

[0004] The traditional system mainly controls based on pre-set welding parameters, lacking real-time feedback mechanism for actual quality changes during welding. This means that the control of the power supply is not directly linked to the final welding quality, and the detection of welding quality usually relies on manual or equipment detection after welding is completed, which cannot achieve real-time control and correction. This hysteresis not only affects the stability of welding quality, but also increases the cost of rework and repair.

[0005] In existing automatic welding equipment, although process parameters can be pre-set, there is a lack of timely identification and adjustment capability for defects that may occur during welding (such as porosity, cracks, incomplete fusion, etc.). Especially in complex welding environments, these defects are often difficult to be discovered in time during welding, and can only be discovered after welding is completed through non-destructive testing or other quality detection methods, which undoubtedly increases the risk and cost of rework.

[0006] Traditional welding processes and equipment require high skills of operators, especially in complex welding environments, operators need to rely on rich experience and skills to cope with changing working conditions. However, due to the difficulty of existing welding power supply to adapt to these changes, welding defects occur frequently, and welding parameters cannot be adjusted in time to improve welding quality. This strong dependence on operators not only limits the stability and quality of welding process, but also increases the influence of human factors on welding results.

[0007] Therefore, a welding intelligent control circuit is proposed. Utility model content

[0008] The present specification provides a welding intelligent control circuit, which performs well in improving welding efficiency, ensuring welding quality, realizing intelligent control, and ensuring safety.

[0009] The present specification provides a welding intelligent control circuit, comprising: a rectifier module, a filter module, an inverter module, a drive module, a protection module, a D\A conversion module, a control module;

[0010] The rectifier module is connected with the filter module, the filter module is connected with the inverter module, the inverter module is connected with the drive module and the protection module respectively, the drive module is connected with the D\A conversion module, the D\A conversion module is connected with the protection module and the control module respectively, and the control module is connected with a welding gun.

[0011] Optionally, the rectifier module comprises a transformer, the transformer comprises a primary coil U1 and a secondary coil U2, the primary coil U1 is connected with the secondary coil U2, the secondary coil U2 is connected with a bridge component, the bridge component comprises diodes D1, D2, D3 and D4, the negative electrode of the diode D4 is connected with the secondary coil U2 and the positive electrode of the diode D1 respectively, the negative electrode of the diode D1 is connected with the negative electrode of the diode D2 and a resistor R1 respectively, the positive electrode of the diode D2 is connected with the negative electrode of the diode D3, the positive electrode of the diode D3 is connected with the positive electrode of the diode D4, and the resistor R1 is connected with the filter module.

[0012] Optionally, the filter module comprises a capacitor C1 connected with the resistor R1, the capacitor C1 is connected with a resistor R2, the resistor R2 is connected with a capacitor C2, and the capacitor C2 is connected with the inverter module.

[0013] Optionally, the inverter module comprises triodes Q1, Q2, Q3 and Q4, the triode Q1 is connected with the triode Q4, the triode Q2 and the triode Q3 respectively, the triode Q4 is connected with the triode Q2, the triode Q3 and an inductor L1 respectively, the triode Q2 is connected with the drive module and the triode Q3, the triode Q3 is connected with the inductor L1, the inductor L1 is connected with a capacitor C3 and a resistor R3 respectively, and the capacitor C3 is connected with the resistor R3.

[0014] Optionally, the drive module comprises a triode Q6 and an N-MOS tube Q5, the drain of the N-MOS tube Q5 is connected with the triode Q3, the source of the N-MOS tube Q5 is grounded, the gate of the N-MOS tube Q5 is connected with a resistor R7 and a resistor R6 respectively, the resistor R7 is connected with the collector of the triode Q6, the triode Q2 and the resistor R6 respectively, the emitter of the triode Q6 is grounded, the base of the triode Q6 is connected with a resistor R5, the resistor R5 is connected with a resistor R4, and the resistor R4 is connected with the D\A conversion module.

[0015] Optionally, the D\A conversion module comprises an amplifier U3 connected with the resistor R4, the amplifier U3 is connected with a resistor R8 and a resistor R9 respectively, the resistor R8 is connected with the resistor R9, the resistor R9 is connected with a resistor R10 and the control module respectively, the resistor R10 is connected with a resistor R11, the resistor R11 is connected with a resistor R12, and the resistor R12 is connected with the protection module.

[0016] Optionally, the protection module comprises a capacitor C4 connected with the resistor R12, the capacitor C4 is connected with a resistor R13, a resistor R14 and a resistor R15 respectively, the resistor R13 is connected with the resistor R14 and a base of a triode Q7 respectively, a collector of the triode Q7 is connected with a capacitor C5 and a base of a triode Q8 respectively, an emitter of the triode Q7 is connected with an alarm U5, the alarm U5 is connected with a resistor R16, the resistor R16 is connected with the capacitor C5, the capacitor C5 is connected with the collector of the triode Q8, and the collector of the triode Q8 is connected with the resistor R15.

[0017] Optionally, the control module comprises an STM32H7 intelligent control MCU.

[0018] In the present specification, through the cooperation of the rectifier module, the filter module and the inverter module, the stability and controllability of the current are ensured, thereby improving the welding quality. The addition of the driving module and the D\A conversion module enables the circuit to accurately adjust the welding parameters according to actual needs, realizing intelligent welding control. In addition, the design of the protection module effectively monitors and responds to abnormal conditions in the circuit, such as overcurrent, overvoltage, etc., triggering an alarm and taking corresponding protection measures in a timely manner, thereby ensuring the safety of the equipment and the operating personnel. The control module adopts an STM32H7 intelligent control MCU, which has powerful data processing and control capabilities, providing strong support for accurate control and optimization of the welding process. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 A structural schematic diagram of a welding intelligent control circuit is provided for the embodiment of the present specification.

[0021] Figure 2 A principle schematic diagram of a welding intelligent control circuit is provided for the embodiment of the present specification.

[0022] The drawings show: 100, a rectifier module; 200, a filter module; 300, an inverter module; 400, a drive module; 500, a protection module; 600, a D / A conversion module; 700, a control module. DETAILED DESCRIPTION

[0023] The following description is presented to enable any person skilled in the art to practice the present application as claimed. The preferred embodiments disclosed herein are only examples of the present application and alternative embodiments can be devised by those skilled in the art without departing from the spirit and scope of the present application. The present application is defined by the appended claims.

[0024] The following detailed description is presented in connection with the appended drawings. Figure 1 is a block diagram of a rectifier module according to an embodiment of the present application. Figures 1-2 Exemplary embodiments of the present application are described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the present application are shown. The present application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. Like reference numerals refer to like elements throughout the specification.

[0025] Features, structures, characteristics or other details described in relation to a particular embodiment are not excluded from other embodiments unless explicitly excluded.

[0026] In the description of the specific embodiments, features, structures, characteristics or other details described in relation to the present application are to enable a person skilled in the art to fully understand the embodiments. However, it is not excluded that a person skilled in the art can practice the technical solution of the present application without one or more of the specific features, structures, characteristics or other details.

[0027] The flowcharts shown in the drawings are only exemplary illustrations and do not necessarily include all the contents and operations / steps, nor do they have to be executed in the order described. For example, some operations / steps can be further divided, and some operations / steps can be combined or partially combined, so the actual execution order can be changed according to the actual situation.

[0028] The block diagrams shown in the drawings are only functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0029] The term "and / or" or "and / or" includes all combinations of one or more of the associated listed items.

[0030] Figure 1 A structural diagram of a welding intelligent control circuit provided by an embodiment of the present specification includes: a rectifier module 100, a filter module 200, an inverter module 300, a drive module 400, a protection module 600, a D / A conversion module, a control module 700.

[0031] The rectifier module 100 is connected with the filter module 200, the filter module 200 is connected with the inverter module 300, the inverter module 300 is connected with the drive module 400 and the protection module 600 respectively, the drive module 400 is connected with the D / A conversion module, the D / A conversion module is connected with the protection module 600 and the control module 700 respectively, and the control module 700 is connected with a welding gun.

[0032] In the specific embodiment of the present specification, the rectifier module 100 converts the input alternating current (AC) into direct current (DC), ensuring that the subsequent circuit can work stably. The filter module 200 is used to smooth the direct current output by the rectifier module 100 and remove the pulsating component therein to obtain a more stable direct current voltage. The inverter module 300 converts the direct current output by the filter module 200 into high-frequency alternating current, which is used to drive the welding gun to perform welding. The drive module 400 is used to control the switching state of the triode in the inverter module 300, thereby adjusting the output voltage and current. The protection module 600 is used to monitor abnormal conditions during welding, such as overcurrent, overvoltage, etc., and cut off the power supply when necessary to protect the safety of the equipment and the operator. The D / A conversion module 500 converts digital control signals into analog signals for adjusting welding parameters (such as current, voltage). The control module 700 is the core of the entire welding intelligent control circuit, responsible for receiving external instructions, processing data, and issuing control signals to adjust welding parameters.

[0033] Optionally, the rectifier module 100 includes a transformer, the transformer includes a primary coil U1 and a secondary coil U2, the primary coil U1 is connected with the secondary coil U2, the secondary coil U2 is connected with a bridge assembly, the bridge assembly includes diodes D1, D2, D3 and D4, the negative electrode of the diode D4 is connected with the secondary coil U2 and the positive electrode of the diode D1 respectively, the negative electrode of the diode D1 is connected with the negative electrode of the diode D2 and a resistor R1 respectively, the positive electrode of the diode D2 is connected with the negative electrode of the diode D3, the positive electrode of the diode D3 is connected with the positive electrode of the diode D4, and the resistor R1 is connected with the filter module 200.

[0034] In the detailed description of the present specification, as shown in Figure 2 The transformer plays a role in voltage transformation in the rectification module 100. It transforms the input AC power voltage into a voltage level suitable for processing by the rectification circuit. The primary coil U1 is the input end of the transformer, connected to the power supply to receive the input AC power; the secondary coil U2 is the output end of the transformer, connected to the bridge rectification circuit, outputting the transformed AC power. The primary coil U1 and the secondary coil U2 are connected through electromagnetic induction principle, realizing voltage transformation. The bridge rectification circuit converts the AC power output by the transformer secondary coil U2 into DC power. This is achieved through the alternating conduction and cutoff of the four diodes (D1, D2, D3, D4). The resistor R1 plays a role in current limiting and voltage dividing in the rectification circuit. It limits the current size passing through the bridge rectification circuit, and participates in the voltage dividing process of the output voltage.

[0035] The rectification module 100, through the cooperative work of the transformer and the bridge rectification circuit, converts the input AC power into stable DC power, providing the necessary power basis for the subsequent filtering, inversion, etc.

[0036] Optionally, the filtering module 200 includes a capacitor C1 connected to the resistor R1, the capacitor C1 connected to a resistor R2, the resistor R2 connected to a capacitor C2, and the capacitor C2 connected to the inversion module 300.

[0037] In the detailed description of the present specification, the capacitor C1 is the main energy storage element in the filtering circuit, which can absorb and release charges in the rectified output DC power, thereby smoothing the output voltage fluctuations. The resistor R2 plays a role in voltage dividing and current limiting in the filtering circuit. Together with the capacitor C1, it forms an RC filter circuit, and by adjusting the values of the resistor and the capacitor, the smoothness and stability of the output voltage can be controlled. The capacitor C2 is another energy storage element in the filtering circuit, which further absorbs and releases charges to further smooth the output voltage. Compared with the capacitor C1, the capacitor C2 has a larger capacity to provide stronger filtering effect.

[0038] In the filtering circuit, the capacitors C1 and C2 smooth the output voltage through the charging and discharging process. When the rectification module 100 outputs a higher DC voltage, the capacitors C1 and C2 begin to charge and absorb excess charges. When the voltage decreases, the capacitors C1 and C2 begin to discharge and release the previously stored charges, thereby maintaining the stability of the output voltage. The resistor R2 plays a role in limiting current and voltage dividing, together with the capacitors C1 and C2 forming an RC filter circuit. By adjusting the values of the resistor R2 and the capacitors C1 and C2, the smoothness and stability of the output voltage can be precisely controlled.

[0039] Optionally, the inverter module 300 comprises: a triode Q1, a triode Q2, a triode Q3, a triode Q4, the triode Q1 is connected with the triode Q4, the triode Q2 and the triode Q3 respectively, the triode Q4 is connected with the triode Q2, the triode Q3 and the inductor L1 respectively, the triode Q2 is connected with the driving module 400 and the triode Q3, the triode Q3 is connected with the inductor L1, the inductor L1 is connected with the capacitor C3 and the resistor R3 respectively, and the capacitor C3 is connected with the resistor R3.

[0040] In the specific embodiment of the present specification, the triode Q1 plays a key role in the inverter module 300, which together with other triodes constitutes the core part of the inverter circuit. By controlling the conduction and cutoff of Q1, the adjustment of output current and voltage can be realized. Q2 and Q3 are complementary pairs of tubes in the inverter circuit, which are alternately turned on and off to generate high-frequency alternating current. This alternating on-off state is determined by the control signals of Q1 and Q4. Q4 works together with Q1, Q2 and Q3 in the inverter module 300 to determine the waveform and frequency of the output current and voltage. By controlling the conduction and cutoff of Q4, the output characteristics of the inverter circuit can be further adjusted. The inductor L1 plays a role in energy storage and filtering in the inverter module 300. When the triode Q2 or Q3 is turned on, the inductor L1 begins to store energy; when they are turned off, the inductor L1 releases the previously stored energy, thereby generating high-frequency alternating current. The capacitor C3 and the resistor R3 together constitute an LC filter circuit for smoothing the high-frequency alternating current output by the inverter module 300. By adjusting the values of C3 and R3, the waveform and stability of the output voltage can be further controlled.

[0041] Optionally, the driving module 400 comprises: a triode Q6, an N-MOS tube Q5, the drain of the N-MOS tube Q5 is connected with the triode Q3, the source of the N-MOS tube Q5 is grounded, the gate of the N-MOS tube Q5 is connected with the resistor R7 and the resistor R6 respectively, the resistor R7 is connected with the collector of the triode Q6, the triode Q2 and the resistor R6 respectively, the emitter of the triode Q6 is grounded, the base of the triode Q6 is connected with the resistor R5, the resistor R5 is connected with the resistor R4, and the resistor R4 is connected with the D / A conversion module.

[0042] In the specific embodiment of the present specification, the triode Q6 serves as a signal amplification or switching element for receiving control signals from the D / A conversion module 500 and amplifying or processing them. The N-MOS tube Q5 serves as a switching element that turns on or off according to the control signal received by the gate, thereby controlling the gate voltage of the triode Q3.

[0043] The D / A conversion module 500 converts the digital control signal into an analog signal and transmits it to the base of the transistor Q6 through resistors R4 and R5. The transistor Q6 amplifies the received signal and outputs it through its collector to the resistor R7. The resistors R7 and R6 are connected to the gate of the N-MOS tube Q5 to form a voltage dividing circuit for adjusting the control voltage of the Q5 gate. When the Q5 gate voltage reaches the threshold voltage, Q5 is turned on, allowing current to flow from the drain to the source, thereby controlling the gate voltage and on-off state of the transistor Q3.

[0044] Optionally, the D\A conversion module includes an amplifier U3 connected to the resistor R4, the amplifier U3 is connected to resistors R8 and R9 respectively, the resistor R8 is connected to the resistor R9, the resistor R9 is connected to resistors R10 and the control module 700 respectively, the resistor R10 is connected to resistor R11, the resistor R11 is connected to resistor R12, and the resistor R12 is connected to the protection module 600.

[0045] In the specific embodiment of the present specification, the amplifier U3 is the core part of the D / A conversion, which is responsible for converting digital signals into analog signals. In this process, the amplifier plays a role in buffering, amplifying or adjusting the signal level.

[0046] The control module 700 or other front-end circuit sends a digital or analog control signal to the input end of the amplifier U3. After receiving the signal, the amplifier U3 converts the digital signal into an analog signal according to the setting of the internal circuit and feedback network (R8 and R9) and adjusts its level. The output signal is divided by resistors R9 and R10 to obtain the required analog output signal. Resistors R11 and R12 act as protection elements to limit the output current and prevent overcurrent conditions.

[0047] Optionally, the protection module 600 includes a capacitor C4 connected to the resistor R12, the capacitor C4 is connected to resistors R13, R14 and R15 respectively, the resistor R13 is connected to the resistor R14 and the base of the transistor Q7 respectively, the collector of the transistor Q7 is connected to the capacitor C5 and the base of the transistor Q8 respectively, the emitter of the transistor Q7 is connected to the alarm U5, the alarm U5 is connected to the resistor R16, the resistor R16 is connected to the capacitor C5, the capacitor C5 is connected to the collector of the transistor Q8, and the collector of the transistor Q8 is connected to the resistor R15.

[0048] In the detailed description of the present specification, capacitor C4 is used as a filtering element to smooth or remove high-frequency noise and interference signals in the circuit. Triodes Q7 and Q8 are used as electronic switches or amplification elements to detect abnormal conditions (such as overcurrent, overvoltage, etc.) in the circuit and control the triggering of the alarm. When an abnormal condition in the circuit is detected, the alarm will emit a sound or light signal to alert the operator. Capacitor C5 and resistor R16 form an RC delay circuit to provide a certain delay when an abnormal condition occurs to avoid false alarms.

[0049] When an abnormal condition (such as overcurrent, overvoltage, etc.) occurs in the circuit, the circuit network formed by capacitor C4 and resistors R13 to R15 in protection module 600 will detect this change. Triode Q7 acts as a detection element, and its base voltage will change accordingly. When a certain threshold is reached, Q7 is turned on. After Q7 is turned on, its emitter is connected to alarm U5, triggering the alarm to emit a sound or light signal. At the same time, the RC delay circuit formed by capacitor C5 and resistor R16 provides a certain delay for the alarm triggering to avoid false alarms. Triode Q8 acts as an auxiliary element to enhance the driving capability of the alarm signal or provide additional protection functions.

[0050] Optionally, the control module 700 includes an STM32H7 intelligent control MCU.

[0051] In the detailed description of the present specification, the STM32H7 MCU integrates an advanced processing core, high-speed memory, rich peripheral interfaces, and powerful power management functions, making it capable of handling complex control tasks.

[0052] In the present utility model, through the cooperation of rectifier module 100, filter module 200 and inverter module 300, the stability and controllability of the current are ensured, thereby improving the welding quality. The addition of drive module 400 and D\A conversion module enables the circuit to accurately adjust the welding parameters according to actual needs, realizing intelligent welding control. In addition, the design of protection module 600 effectively monitors and responds to abnormal conditions in the circuit, such as overcurrent, overvoltage, etc., triggering alarms and taking appropriate protective measures in a timely manner, ensuring the safety of the equipment and the operator. Control module 700 uses an STM32H7 intelligent control MCU, which has powerful data processing and control capabilities, providing strong support for precise control and optimization of the welding process.

[0053] The above-described specific embodiments further specifically describe the purposes, technical solutions and advantages of the present application, and it should be understood that the present application is not inherently related to any specific computer, virtual device or electronic device, and various general-purpose devices can also implement the present application. The above-described is only a specific embodiment of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0054] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment mainly describes the difference from other embodiments.

[0055] The above-described is only an embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A welding intelligence control circuit, characterized by, Include: Rectifier module (100), filter module (200), inverter module (300), drive module (400), protection module (500), D\A conversion module (600), control module (700); The rectifier module (100) is connected with the filter module (200), the filter module (200) is connected with the inverter module (300), the inverter module (300) is connected with the drive module (400) and the protection module (500) respectively, the drive module (400) is connected with the D\A conversion module (600), the D\A conversion module (600) is connected with the protection module (500) and the control (700) respectively, and the control module (700) is connected with the welding gun.

2. The welding intelligence control circuit of claim 1, wherein, The rectifier module (100) It includes transformer, the transformer includes primary coil U1, secondary coil U2, the primary coil U1 is connected with the secondary coil U2, the secondary coil U2 is connected with the bridge component, the bridge component includes diode D1, diode D2, diode D3, diode D4, the negative electrode of diode D4 is connected with the secondary coil U2 and the positive electrode of diode D1 respectively, the negative electrode of diode D1 is connected with the negative electrode of diode D2 and resistance R1 respectively, the positive electrode of diode D2 is connected with the negative electrode of diode D3, the positive electrode of diode D3 is connected with the positive electrode of diode D4, and the resistance R1 is connected with the filter module (200).

3. The welding intelligence control circuit of claim 2, wherein, The filter module (200) includes: the capacitor C1 connected with the resistance R1, the capacitor C1 is connected with resistance R2, the resistance R2 is connected with the capacitor C2, and the capacitor C2 is connected with the inverter module (300).

4. The welding intelligence control circuit of claim 3, wherein, The inverter module (300) includes: triode Q1, triode Q2, triode Q3, triode Q4, the triode Q1 is connected with the triode Q4, the triode Q2 and the triode Q3 respectively, the triode Q4 is connected with the triode Q2, the triode Q3 and inductance L1 respectively, the triode Q2 is connected with the drive module (400) and the triode Q3, the triode Q3 is connected with the inductance L1, the inductance L1 is connected with the capacitor C3 and the resistance R3 respectively, and the capacitor C3 is connected with the resistance R3.

5. The welding intelligence control circuit of claim 4, wherein, The drive module (400) includes: triode Q6, N-MOS tube Q5, the drain of N-MOS tube Q5 is connected with the triode Q3, the source of N-MOS tube Q5 is grounded, the gate of N-MOS tube Q5 is connected with resistance R7 and resistance R6 respectively, the resistance R7 is connected with the collector of triode Q6, the triode Q2 and the resistance R6 respectively, the emitter of triode Q6 is grounded, the base of triode Q6 is connected with resistance R5, the resistance R5 is connected with resistance R4, and the resistance R4 is connected with the D\A conversion module (600).

6. The welding intelligence control circuit of claim 5, wherein, The DA conversion module (600) comprises an amplifier U3 connected with the resistor R4, the amplifier U3 is connected with a resistor R8 and a resistor R9 respectively, the resistor R8 is connected with the resistor R9, the resistor R9 is connected with a resistor R10 and the control module (700) respectively, the resistor R10 is connected with a resistor R11, the resistor R11 is connected with a resistor R12, and the resistor R12 is connected with the protection module (500).

7. The welding intelligence control circuit of claim 6, wherein, The protection module (500) comprises a capacitor C4 connected with the resistor R12, the capacitor C4 is connected with a resistor R13, a resistor R14 and a resistor R15 respectively, the resistor R13 is connected with the resistor R14 and the base of a triode Q7 respectively, the collector of the triode Q7 is connected with a capacitor C5 and the base of a triode Q8 respectively, the emitter of the triode Q7 is connected with an alarm U5, the alarm U5 is connected with a resistor R16, the resistor R16 is connected with the capacitor C5, the capacitor C5 is connected with the collector of the triode Q8, and the collector of the triode Q8 is connected with the resistor R15.

8. The welding intelligence control circuit of claim 7, wherein, The control module (700) comprises an STM32H7 intelligent control MCU.

Images