Power output control circuit and circuit board of inverter welding machine, inverter welding machine

Abstract

This invention discloses a power output control circuit and circuit board for an inverter welding machine, as well as the inverter welding machine itself. The circuit includes a pulse generation module and an inverting amplifier control module. The pulse generation module generates and outputs a pulse signal. The input terminal of the inverting amplifier control module is connected to the output terminal of the pulse generation module. The inverting amplifier control module inverts and amplifies the pulse signal to generate and output a power output control signal. This power output control signal is used to adjust and control the average output power of the inverter welding machine. According to the technical solution provided by this invention, the power output of the inverter welding machine can be switched on and off using the power output control signal, reducing the average output power of the inverter welding machine. This allows a small-power load (such as a plastic repair handle) to be connected to the output terminal of the inverter welding machine, thereby achieving a multi-functional plastic repair function.

Description

Technical Field

[0001] This invention relates to the field of output control technology for electric welding machines, and in particular to a power output control circuit and circuit board for an inverter electric welding machine, and an inverter electric welding machine. Background Technology

[0002] Currently, traditional inverter welding machines have high output power, which affects both efficiency and lifespan. Even the minimum output power is high, making it difficult to connect low-power loads (such as multi-functional plastic repair machines) to the inverter welding machine output. Therefore, reducing the average output power of inverter welding machines is an urgent problem to be solved. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, embodiments of the present invention provide a power output control circuit and circuit board for an inverter welding machine, and an inverter welding machine, which can control the power output at the output end of the inverter welding machine through a power output control signal, reduce the average output power of the inverter welding machine, thereby enabling the connection of a small power load (such as a plastic repair handle) at the output end of the inverter welding machine, and thus realize a multi-functional plastic repair function.

[0004] In a first aspect, embodiments of the present invention provide a power output control circuit for an inverter welding machine, including...

[0005] A pulse generation module, which is used to generate and output pulse signals;

[0006] An inverting amplifier control module is provided, the input of which is connected to the output of the pulse generation module. The inverting amplifier control module is used to invert and amplify the pulse signal and generate and output a power output control signal, wherein the power output control signal is used to adjust and control the average output power of the inverter welding machine.

[0007] The power output control circuit of the inverter welding machine provided according to the first aspect of the present invention has at least the following beneficial effects: When the power output control circuit is working, a pulse signal is first generated and output by the pulse generation module; then, after the pulse signal is input to the inverting amplification control module, the pulse signal is inverted and amplified by the inverting amplification control module to obtain and output a power output control signal. The power output control signal is used to adjust and control the average output power of the inverter welding machine, thereby reducing the average output power of the inverter welding machine. That is to say, the power output control circuit provided by the embodiment of the present invention can switch the power output at the output end of the inverter welding machine through the power output control signal, thereby reducing the average output power of the inverter welding machine, so that a small power load (such as a plastic repair handle) can be connected to the output end of the inverter welding machine, thereby realizing a multi-functional plastic repair function.

[0008] According to some embodiments of the present invention, the inverting amplifier control module includes: a transistor, the base of which is connected to the output terminal of the pulse generation module, the emitter of which is grounded, and the collector of which is used to output the power output control signal.

[0009] According to some embodiments of the present invention, the inverting amplifier control module further includes: a first resistor, a first end of the first resistor being connected to the base of the transistor, and a second end of the first resistor being connected to a voltage source.

[0010] According to some embodiments of the present invention, the inverting amplifier control module further includes: a second resistor, the second resistor being connected between a first terminal of the first resistor and the base of the transistor.

[0011] According to some embodiments of the present invention, the resistance of the first resistor is 1kΩ.

[0012] According to some embodiments of the present invention, the resistance of the second resistor is 3kΩ.

[0013] According to some embodiments of the present invention, the pulse generation module includes a microcontroller, wherein the microcontroller is an STM8S003F3P6.

[0014] In a second aspect, embodiments of the present invention provide a circuit board, including: a power output control circuit for an inverter welding machine as described in the first aspect.

[0015] The circuit board provided according to a second aspect embodiment of the present invention has at least the following beneficial effects: the circuit board includes a power output control circuit for an inverter welding machine, wherein the power output control circuit includes a pulse generation module and an inverting amplification control module. When the power output control circuit is working, the pulse generation module first generates and outputs a pulse signal; then, after the pulse signal is input to the inverting amplification control module, the inverting amplification control module inverts and amplifies the pulse signal to obtain and output a power output control signal. The power output control signal is used to adjust and control the average output power of the inverter welding machine, thereby reducing the average output power of the inverter welding machine. That is to say, the circuit board provided by the embodiment of the present invention can control the power output at the output end of the inverter welding machine through the power output control signal, thereby reducing the average output power of the inverter welding machine, and thus enabling the connection of a small power load (such as a plastic repair handle) at the output end of the inverter welding machine, thereby realizing a multi-functional plastic repair function.

[0016] Thirdly, embodiments of the present invention provide an inverter welding machine, including: a power output control circuit for the inverter welding machine as described in the first aspect.

[0017] The inverter welding machine provided according to a third aspect embodiment of the present invention has at least the following beneficial effects: The inverter welding machine includes a power output control circuit, wherein the power output control circuit includes a pulse generation module and an inverting amplification control module. When the power output control circuit is working, the pulse generation module first generates and outputs a pulse signal; then, after the pulse signal is input to the inverting amplification control module, the inverting amplification control module inverts and amplifies the pulse signal to obtain and output a power output control signal. The power output control signal is used to adjust and control the average output power of the inverter welding machine, thereby reducing the average output power of the inverter welding machine. That is to say, the circuit board provided in the embodiment of the present invention can control the power output at the output end of the inverter welding machine through the power output control signal, thereby reducing the average output power of the inverter welding machine. This allows a small power load (such as a plastic repair handle) to be connected to the output end of the inverter welding machine, thereby realizing a multi-functional plastic repair function.

[0018] According to some embodiments of the present invention, the inverter welding machine further includes an inverter welding machine control circuit, the input terminal of which is connected to the output terminal of the power output control circuit, and the power output control circuit is used to output a power output control signal to adjust and control the average output power of the inverter welding machine control circuit.

[0019] The beneficial effects of this invention can be understood by practicing it. The objectives and other advantages of this invention can be realized and obtained through the structures particularly pointed out in the specification and drawings. Attached Figure Description

[0020] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0021] Figure 1 This is a schematic diagram of the power output control circuit of an inverter welding machine provided in one embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the specific structure of the power output control circuit of an inverter welding machine provided in one embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the circuit structure of an inverter welding machine provided in one embodiment of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0025] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0026] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0027] This invention provides a power output control circuit and circuit board for an inverter welding machine, as well as the inverter welding machine itself. The power output control circuit includes a pulse generation module and an inverting amplifier control module. When the power output control circuit is working, the pulse generation module first generates and outputs a pulse signal. Then, after the pulse signal is input to the inverting amplifier control module, the inverting amplifier control module inverts and amplifies the pulse signal to obtain and output a power output control signal. This power output control signal is used to adjust and control the average output power of the inverter welding machine. Therefore, the power output control circuit provided in this embodiment of the invention can control the power output at the output end of the inverter welding machine through the power output control signal, reducing the average output power of the inverter welding machine. This allows a small-power load (such as a multi-functional plastic repair machine) to be connected to the output end of the inverter welding machine, thereby realizing the multi-functional plastic repair function.

[0028] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0029] Firstly, such as Figure 1 As shown, Figure 1 This is a schematic diagram of the power output control circuit of an inverter welding machine according to an embodiment of the present invention. Figure 1 In the example, the power output control circuit 100 includes a pulse generation module 110 and an inverting amplifier control module 120. The pulse generation module 110 generates and outputs a pulse signal; the input terminal of the inverting amplifier control module 120 is connected to the output terminal of the pulse generation module 110, and the inverting amplifier control module 120 inverts and amplifies the pulse signal to generate and output a power output control signal. This power output control signal is used to adjust and control the average output power of the inverter welding machine.

[0030] The power output control circuit 100 of the inverter welding machine provided according to the first aspect of the present invention has at least the following beneficial effects: When the power output control circuit 100 is working, a pulse signal is first generated and output by the pulse generation module 110; then, after the pulse signal is input to the inverting amplification control module 120, the inverting amplification control module 120 inverts and amplifies the pulse signal to obtain and output a power output control signal. The power output control signal is used to adjust and control the average output power of the inverter welding machine, thereby reducing the average output power of the inverter welding machine. That is to say, the power output control circuit 100 provided by the present invention can switch the power output at the output end of the inverter welding machine through the power output control signal, thereby reducing the average output power of the inverter welding machine, so that a small power load (such as a plastic repair handle) can be connected to the output end of the inverter welding machine, thereby realizing a multi-functional plastic repair function.

[0031] like Figure 1 and Figure 2 As shown, Figure 2 This is a schematic diagram of the specific structure of the power output control circuit of an inverter welding machine provided in one embodiment of the present invention. According to some embodiments of the present invention, the inverting amplifier control module 120 includes: a transistor Q1, the base of the transistor Q1 is connected to the output terminal of the pulse generation module 110, the emitter of the transistor Q1 is grounded, and the collector of the transistor Q1 is used to output a power output control signal.

[0032] Specifically, in the inverting amplifier control module 120, pin 1 of transistor Q1 is the collector, pin 2 is the base, and pin 3 is the emitter. The pulse signal PB4 generated by the pulse generation module 110 is output to the base of transistor Q1, which acts as an inverting electrode. A power output control signal, inverted from the collector of transistor Q1, is output. This power output control signal is used to adjust and control the average output power of the inverter welding machine. It can switch the power output at the output end of the inverter welding machine, reducing the average output power of the inverter welding machine. This allows a small power load (such as a plastic repair handle) to be connected to the output end of the inverter welding machine, thereby realizing a multi-functional plastic repair function.

[0033] like Figure 2 As shown, according to some embodiments of the present invention, the inverting amplifier control module 120 further includes: a first resistor R1, the first end of the first resistor R1 being connected to the base of the transistor, and the second end of the first resistor R1 being connected to a voltage source.

[0034] Specifically, in one embodiment, the resistance of the first resistor R1 is 1kΩ. The voltage source can output a 5V voltage, which, after passing through the first resistor R1, provides a forward bias voltage to the base of the transistor Q1, ensuring that when the pulse generation module 110 has no pulse signal PB4 output, the transistor Q1 is in the conducting state, and a low level is output at the collector of the transistor Q1.

[0035] like Figure 2 As shown, according to some embodiments of the present invention, the inverting amplifier control module 120 further includes a second resistor R2, which is connected between the first terminal of the first resistor R1 and the base of the transistor Q1. Specifically, in one embodiment, the resistance of the second resistor R2 is 3kΩ.

[0036] When the power output control circuit 100 is working, when the pulse generation module 110 has no pulse signal output, transistor Q1 is in the on state, and the power output control signal output from the collector of transistor Q1 is low level; when the pulse generation module 110 outputs pulse signal PB4, the collector of transistor Q1 outputs a power output control signal that is inversely phase to the pulse signal PB4; when the pulse signal PB4 is high level, the power output control signal is low level; when the pulse signal PB4 is low level, the power output control signal is high level. The output power output control signal controls the power output at the output terminal of the inverter welding machine. When the power output control signal is low level, the inverter welding machine output terminal has output voltage and current (i.e., power output); when the power output control signal is high level, the inverter welding machine output terminal has no output voltage and current (i.e., no power output). By controlling the power output of the inverter welding machine through the power output control signal, the average output power of the inverter welding machine is reduced, thereby enabling the connection of a small power load (such as a plastic repair handle) to the output of the inverter welding machine, thus realizing the multi-functional plastic repair function.

[0037] like Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, the pulse generation module 110 includes a microcontroller U1, which is an STM8S003F3P6. The pulse generation module 110 generates a pulse signal PB4 via the microcontroller U1. The microcontroller U1 includes multiple pins, wherein pin 12 is connected to the base of transistor Q1 via a second resistor R2. Pin 12 is used to output the pulse signal; that is, pin 12 of the microcontroller U1 is the output terminal of the pulse generation module 110.

[0038] It is understandable that by adjusting the internal pulse wave generation program of the microcontroller U1 of the pulse generation module 110, the duty cycle of the pulse signal PB4 output by the pulse generation module 110 can be adjusted, thereby adjusting the duty cycle of the power output control signal at the output terminal of the inverting amplifier control module 120, and thus adjusting the switching control of the power output of the inverter welding machine, ultimately adjusting the average output power of the inverter welding machine, and achieving more flexible switching control of the power output of the inverter welding machine.

[0039] Specifically, in one embodiment, when the duty cycle of the pulse signal PB4 output by the pulse generation module 110 is 90% (90% high level, 10% low level), the inverting amplifier control module 120 outputs a power output control signal that is inverted with the pulse signal PB4, and the duty cycle of the power output control signal is 10% (10% high level, 90% low level). When the power output control signal output by the inverting amplifier control module 120 is high, the inverter welding machine outputs voltage and current (power output). Under the control of the power output control signal with a duty cycle of 10%, the inverter welding machine output only outputs voltage and current (power output) for 10% of the time within one pulse time period, and there is no power output for the remaining 90% of the time. In this way, the average output power of the inverter welding machine is reduced to the output power within 10% of the unit pulse time period, that is, the average output power of the inverter welding machine is reduced, so that the inverter welding machine output can be connected to a small power load (such as a plastic repair handle), thereby realizing the multi-functional plastic repair function.

[0040] It will be understood by those skilled in the art that Figure 1 The power output control circuit 100 of the inverter welding machine shown does not constitute a limitation on the present invention and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0041] Secondly, embodiments of the present invention provide a circuit board including a power output control circuit 100 for an inverter welding machine according to the first aspect. The circuit board provided according to the second aspect of the present invention has at least the following beneficial effects: the circuit board includes a power output control circuit 100 for an inverter welding machine, wherein the power output control circuit 100 includes a pulse generation module 110 and an inverting amplification control module 120. When the power output control circuit is working, the pulse generation module 110 first generates and outputs a pulse signal; then, after the pulse signal is input to the inverting amplification control module 120, the inverting amplification control module 120 inverts and amplifies the pulse signal to obtain and output a power output control signal, which is used to adjust and control the average output power of the inverter welding machine. Therefore, the circuit board provided by the embodiments of the present invention can control the power output at the output end of the inverter welding machine through the power output control signal, reducing the average output power of the inverter welding machine, thereby enabling the connection of a small power load (such as a plastic repair handle) at the output end of the inverter welding machine, and thus realizing a multi-functional plastic repair function.

[0042] Thirdly, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the circuit structure of an inverter welding machine according to an embodiment of the present invention. The inverter welding machine 200 includes a power output control circuit 100 as described in the first aspect. The inverter welding machine 200 provided according to a third aspect embodiment of the present invention has at least the following beneficial effects: the inverter welding machine 200 includes a power output control circuit 100, wherein the power output control circuit 100 includes a pulse generation module 110 and an inverting amplifier control module 120. When the power output control circuit 100 is working, a pulse signal is first generated and output by the pulse generation module 110; then, after the pulse signal is input to the inverting amplifier control module 120, the inverting amplifier control module 120 inverts and amplifies the pulse signal to obtain and output a power output control signal, which is used to adjust and control the average output power of the inverter welding machine. Therefore, the inverter welding machine 200 provided in this embodiment of the invention can switch the power output at the output end of the inverter welding machine through the power output control signal, reduce the average output power of the inverter welding machine, and thus enable the connection of a small power load (such as a plastic repair handle) at the output end of the inverter welding machine, thereby realizing a multi-functional plastic repair function.

[0043] According to some embodiments of the present invention, the inverter welding machine further includes an inverter welding machine control circuit 210, the input terminal of which is connected to the output terminal of the power output control circuit 100. The power output control circuit 100 is used to output a power output control signal to adjust and control the average output power of the inverter welding machine control circuit 210.

[0044] Specifically, in one embodiment, the inverter welding machine control circuit includes a monolithic integrated PWM control chip of model SG3525. The monolithic integrated PWM control chip is used to output a PWM (Pulse Width Modulation) waveform. This monolithic integrated PWM control chip includes multiple pins, with pin 8 being a soft-start terminal. Pin 8 of the monolithic integrated PWM control chip is connected to the output terminal of the power output control circuit 100. The power output control circuit 100 outputs a power output control signal to pin 8 of the monolithic integrated PWM control chip. When the power output control signal is high, the monolithic integrated PWM control chip outputs a PWM waveform, and the inverter welding machine outputs current and voltage (power output); when the power output control signal is low, the monolithic integrated PWM control chip does not output a PWM waveform, and the inverter welding machine outputs no current and voltage (no power output). In other words, in the inverter welding machine 200 provided in the embodiments of the present invention, the power output control signal output by the power output control circuit 100 controls the switching of the PWM waveform output of the inverter welding machine control circuit 210, which can reduce the average output power of the inverter welding machine, thereby enabling the connection of a small power load (such as a plastic repair handle) to the output end of the inverter welding machine, and thus realizing the multi-functional plastic repair function.

[0045] Combination Figures 1 to 3 The microcontroller U1 in the pulse generation module 110 generates a pulse signal PB4, which is output to the base of transistor Q1 through pin 12 of the microcontroller U1. After being inverted and amplified by transistor Q1, a power output control signal inverted from the pulse signal PB4 is output through the collector of transistor Q1. The power output control signal is output to pin 8 of the single-chip integrated PWM control chip of the inverter welding machine control circuit 210. The power output control signal controls the switching of the PWM waveform output of the inverter welding machine control circuit 210, reducing the average output power of the inverter welding machine 200. This allows a small power load (such as a plastic repair handle) to be connected to the output of the inverter welding machine, thereby realizing a multi-functional plastic repair function.

[0046] The above is a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the present invention.

Claims

1. A power output control circuit for an inverter welding machine, characterized in that, include: A pulse generation module, which is used to generate and output pulse signals; An inverting amplifier control module is provided, the input of which is connected to the output of the pulse generation module. The inverting amplifier control module is used to invert and amplify the pulse signal and generate and output a power output control signal. The power output control signal is used to adjust and control the average output power of the inverter welding machine. The inverting amplifier control module includes a transistor, the base of which is connected to the output terminal of the pulse generation module, the emitter of which is grounded, and the collector of which is used to output the power output control signal; the pulse generation module includes a microcontroller. The power output control circuit is used to: when the pulse generation module has no pulse signal output, turn on the transistor, and output a low-level power output control signal at the collector of the transistor; when the pulse generation module outputs a pulse signal, output a power output control signal that is inversely phase to the pulse signal at the collector of the transistor; when the pulse signal is high, the power output control signal is low; when the pulse signal is low, the power output control signal is high; the output power output control signal controls the power output of the inverter welding machine, including: when the power output control signal is low, the inverter welding machine output has power output; when the power output control signal is high, the inverter welding machine output has no power output. In the inverting amplifier control module, pin 1 of the transistor is the collector, pin 2 is the base, and pin 3 is the emitter. The pulse signal generated by the pulse generation module is output to the base of the transistor, which acts as an inverting electrode. A power output control signal inversely to the pulse signal is output from the collector of the transistor. By adjusting the internal pulse wave generation program of the microcontroller in the pulse generation module, the duty cycle of the pulse signal output by the pulse generation module can be adjusted, thereby adjusting the duty cycle of the power output control signal output by the inverting amplifier control module, and thus adjusting the switching control of the power output of the inverter welding machine, ultimately regulating the average output power of the inverter welding machine.

2. The power output control circuit of the inverter welding machine according to claim 1, characterized in that, The inverting amplifier control module further includes: a first resistor, the first end of which is connected to the base of the transistor, and the second end of which is connected to a voltage source.

3. The power output control circuit of the inverter welding machine according to claim 2, characterized in that, The inverting amplifier control module further includes a second resistor, which is connected between the first end of the first resistor and the base of the transistor.

4. The power output control circuit of the inverter welding machine according to claim 2, characterized in that, The resistance of the first resistor is 1kΩ.

5. The power output control circuit of the inverter welding machine according to claim 3, characterized in that, The resistance of the second resistor is 3kΩ.

6. A circuit board, characterized in that, include: The power output control circuit of the inverter welding machine as described in any one of claims 1 to 5.

7. An inverter welding machine, characterized in that, include: The power output control circuit of the inverter welding machine as described in any one of claims 1 to 5.

8. The inverter welding machine according to claim 7, characterized in that, The inverter welding machine also includes an inverter welding machine control circuit. The input terminal of the inverter welding machine control circuit is connected to the output terminal of the power output control circuit. The power output control circuit is used to output a power output control signal to adjust and control the average output power of the inverter welding machine control circuit.

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