Intelligent magnetic biasing detection and processing device for inversion welding power supply

Abstract

The invention discloses an intelligent magnetic biasing detection and processing device for an inversion welding power supply. The intelligent magnetic biasing detection and processing device comprises a sensor and signal conditioning module, an adder / subtracter module, a proportion adjuster, a comparator, a controller input signal conditioning module, a digital controller and an adjustment voltage input module, wherein the sensor and signal conditioning module for acquiring welding current sends a signal to the adder / subtracter module; the adjustment voltage input module sends a signal into the adder / subtracter module; the signals are processed by the adder / subtracter module and then sent to the comparator; current on the primary side of a main transformer is processed by the sensor and signal conditioning module and then sent to the proportion adjuster; the proportion adjuster sends the signals to the comparator; the comparator compares the signals sent by the adder / subtracter module and the proportion adjuster, and sends the signals to the controller input signal conditioning module; and the controller input signal conditioning module sends the signals to the digital controller. The intelligent magnetic biasing detection and processing device has high stability and reliability and high generality.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to an intelligent bias detection and processing device for an inverter welding power supply. Background technique [0002] Since the 1980s, after 20 to 30 years of development, the inverter welding power supply has become the main development direction in the international welding equipment market due to its advantages of high efficiency, energy saving, fast dynamic response, flexible control, and easy waveform fine control. . However, the problem of low reliability is the bottleneck restricting the rapid development of welding power sources, and the existence of magnetic bias is the most critical problem. Due to various factors, the amplitude or width of the pulse applied to the main transformer is not equal within two PWM half cycles, and a DC component will be generated in the main transformer, the excitation current will change sharply, and the magnetization curve will be seve...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing technology can only suppress the magnetic bias to a certain extent, and will reduce the dynamic response performance of the system, and it is difficult to meet the high-efficiency welding process, such as fine droplet control, etc., and high-performance digital welding The problem of the demand of the power supply system; provide an intelligent magnetic bias detection and processing device for the inverter welding power supply; Simultaneous collection with welding current, the detection circuit immediately detects the magnetic bias signal and its width, and feeds the information back to the digital controller, and adjusts the PWM output pulse by the corresponding control strategy to achieve rapid and effective suppression of the magnetic bias; Good performance, high stability and reliability, strong versatility, high universality, flexible and changeable control strategies, and good intelligence

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