Portable central processing unit (CPU) controlled high-power electric welding machine

Abstract

The invention relates to a portable central processing unit (CPU) controlled high-power electric welding machine. The electric welding machine comprises a CPU control circuit board, a radiator, an air fan and a shielding layer which are arranged in a shell; and a high-frequency resonant soft switch circuit which consists of four insulated gate bipolar transistor (IGBT) power transistors Q1, Q2, Q3 and Q4, two resonant inductors L1 and L2, a high-frequency transformer T1, two fast recovery diodes D1 and D2, an input filter capacitor C1, a resonant capacitor C2, an output filter capacitor C3 and a ferrite reactor L3 is also arranged in the shell. The CPU control circuit is adopted to realize digital button operation, a pulse width modulation (PWM) wave form is output by CPU given control current to control a driving transformer, the on/off of the IGBT power transistors is regulated to control the high-frequency transformer to do work, rectification is performed by the fast recovery diodes, the resonant inductors and the resonant capacitors play a role in realizing resonant frequency and feeding back energy, and the resonant frequency and the energy are finally output by the ferrite reactor. The CPU centralized control is realized; moreover, the high-power electric welding machine has low fault rate, high insulativity, a good dust blocking effect and long service life, is convenient to operate, saves energy, reduces consumption, prevents interference, and is low in production cost and use cost.

Description

technical field [0001] The invention relates to an electric welding machine, in particular to a high-power portable electric welding machine controlled by a CPU. Background technique [0002] At present, the commonly used electric welding machine uses 50HZ low-frequency AC power supply. The disadvantages of this electric welding machine are large volume, heavy waste of raw materials, inconvenient use, inaccurate control, high power consumption, poor heat dissipation, low efficiency, small working cycle, and low electric power. Small, unstable output current, frequent arc breaks, high cost in use, and poor welding effect. Contents of the invention [0003] In order to solve the deficiencies of the prior art, the present invention provides a small size, light weight, easy to carry, centralized CPU control, low failure rate, convenient operation, energy saving, anti-interference, strong insulation, good dust blocking effect, The CPU controls the high-power portable electric ...

AI Technical Summary

Problems solved by technology

[0002] At present, the commonly used electric welding machine uses 50HZ low-frequency AC power supply. The disadvantages of this electric welding machine are large volume, heavy waste of raw materials, inconvenient use, inaccurate control, high power consumption, poor heat dissipation, low efficiency, small working cycle, and low electric power. Small, unstable output current, frequent arc breaks, high cost in use, poor welding effect

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