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Self-adaptive welding machine characteristic control circuit

An adaptive control and control circuit technology, applied in manufacturing tools, welding equipment, arc welding equipment, etc., can solve the problems of inconvenient use, poor operation effect, and affecting the reliability of inverter power devices.

Pending Publication Date: 2021-05-14
SHANGHAI HUGONG ELECTRIC WELDING MACHINE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is not convenient to use and the operation effect is not good
[0003] Existing welding machines are usually in an open-loop state when they are no-load, and output the maximum pulse width. The short-circuit impact current during arc ignition will be relatively large, which will affect the reliability of the inverter power device.

Method used

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  • Self-adaptive welding machine characteristic control circuit
  • Self-adaptive welding machine characteristic control circuit
  • Self-adaptive welding machine characteristic control circuit

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0031] An adaptive welding machine characteristic control circuit of the present application, such as figure 1 As shown, it includes: welding current given circuit, thrust generation and adjustment circuit, thermal arc control circuit, adaptive control circuit, signal operation circuit, PWM pulse width modulation circuit.

[0032] The output of the welding current setting circuit, the output of the thrust generation and adjustment circuit, the output of the thermal arc control circuit, and the output of the adaptive control circuit are connected to the input of the signal operation circuit. The control signal and the thermal arc control signal are summed and inverted, and the calculation result is output.

[0033] One output of the adaptive control circuit and the output of the thrust generating and adjusting circuit are connected to the control bus, and connected to the first input terminal of the signal operation circuit through the control bus.

[0034] The welding current...

specific Embodiment 2

[0039] An adaptive welding machine characteristic control circuit of the present application is different from the specific embodiment 1 in that it also includes a no-load closed-loop control circuit,

[0040] The second output of the thermal arc control circuit is connected to one input terminal of the no-load closed-loop control circuit; the other input terminal of the no-load closed-loop control circuit is connected to the output feedback voltage terminal, and its output terminal is connected to the third input of the PI error amplifier circuit end.

[0041] The no-load closed-loop control circuit is used for summing and amplifying the output feedback voltage signal and the thermal arc start control signal to obtain a no-load closed-loop control signal for the PI error amplifier circuit.

[0042] The PI error amplification circuit performs summation and inversion operation on the operation result of the signal operation circuit, the output feedback current signal, and the n...

specific Embodiment 3

[0045] A thrust generation and adjustment circuit of an adaptive welding machine characteristic control circuit of the present application, such as figure 2 , 3 As shown, the thrust generation and adjustment circuit includes a thrust generation circuit and a thrust adjustment circuit, and the output thereof is connected to the control bus.

[0046]The thrust generating circuit includes an amplifying circuit U1A, the positive input terminal of the amplifying circuit U1A is connected to the first voltage setting terminal for providing a first setting voltage, and thrust is generated when the voltage is lower than the first setting voltage.

[0047] In this specific embodiment, the first set voltage terminal is composed of a resistor R4 and a voltage regulator tube Z1 in series, the other end of the resistor R4 is connected to the power supply, the other end of the voltage regulator tube Z1 is grounded, and the connection between the resistor R4 and the voltage regulator tube Z1...

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Abstract

The invention discloses a self-adaptive welding machine characteristic control circuit which realizes the effect that thrust current is automatically matched with welding current by setting a control bus associated with a welding current given signal. The voltage of the control bus is related to the output voltage of a thrust generating circuit, the output voltage of a thrust adjusting circuit and the output voltage of a self-adaptive control circuit, the thrust generating circuit outputs a thrust control signal according to the magnitude of the output voltage of the welding machine, and the thrust adjusting circuit clamps and controls the maximum value of the bus voltage according to a thrust given circuit. The self-adaptive control circuit clamps and controls the maximum value of the bus voltage according to the welding current, and meanwhile, the self-adaptive circuit automatically adjusts the maximum value of a thermal arc striking control signal, so that self-adaptive matching of the thermal arc striking current is realized.

Description

technical field [0001] The invention relates to the technical field of welding machine control, in particular to an adaptive welding machine characteristic control circuit. Background technique [0002] At present, the arc welding machine is a commonly used engineering tool. The control mode of the existing manual arc welding machine on the thrust and thermal arc is relatively simple, and the thrust and thermal arc can only be adjusted according to the arc voltage. There is no linkage match between the value and the welding specification. It is not very convenient to use, and the operation effect is not good enough. [0003] Existing welding machines are usually in an open-loop state when they are no-load, and output the maximum pulse width. The short-circuit impact current during arc ignition will be relatively large, which will affect the reliability of the inverter power device. [0004] Therefore, how to improve the linkage control of thrust and thermal arc ignition an...

Claims

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Application Information

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IPC IPC(8): B23K9/067B23K9/095
CPCB23K9/067B23K9/095
Inventor 舒振宇雷斌
Owner SHANGHAI HUGONG ELECTRIC WELDING MACHINE MFG
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