Power supply for arc welding machine based on high-power factor technique

Abstract

The invention discloses a power supply for an arc welding machine based on a high-power factor technique. The power supply comprises first to thirteenth diodes, first to twenty-sixth capacitors, first to tenth resistors, a first three-end voltage stabilizer, a second three-end voltage stabilizer, a transformer, a power supply control chip and a field effect transistor. The arc welding machine disclosed by the invention is mainly composed of a rectifier, an inverter, a high-frequency rectifier, a filter, a switch control power supply and a control system; a high-frequency pulse width modulation wave is generated by the control circuit and is used for controlling the switch-on / off of an inverter power tube in real time; the duty cycle of the pulse is adjusted and controlled according to the magnitude of the welding current feedback signal; the welding current is stabilized at a preset value; the arc is ignited when the two output poles are instantly short-circuited; the generated arc is utilized to melt a welding electrode and a welding material; after cooling, the welding electrode and the welding material are combined with each other; the power supply has popularization and application values.

Description

technical field [0001] The invention relates to the technical field of electric welding machines, in particular to an electric arc welding machine power supply with high power factor technology. Background technique [0002] Arc welding is the most widely used welding method in welding methods. Inverter arc welding machine rectifies single-phase (three-phase) alternating current, transforms it into medium-high frequency alternating current of hundreds to tens of thousands of hertz by an inverter, and outputs alternating current or direct current after stepping down. The whole process is controlled by the electronic circuit, so that the power supply can obtain the external and dynamic characteristics that meet the requirements. The general development trend of the inverter power supply is to develop towards large capacity, light weight, high efficiency, modularization, and intelligence, with the core of improving reliability, performance, and broadening applications. It is m...

AI Technical Summary

Problems solved by technology

The disadvantage is that it requires the use of power frequency transformers and filters, which have a large volume and weight, and the power consumption of the adjustment tube is large, and heat dissipation is difficult, which greatly reduces the efficiency of the power supply. Generally, it will not exceed 50%.

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