Spot welding machine control system

Abstract

The invention discloses a spot welding machine control system, comprising an EMI filtering circuit, a voltage transformation rectifying filtering voltage stabilizing circuit, a synchronous circuit, a CUP program control circuit, a starting circuit, a drive circuit, a separately excited switching power supply circuit, and a pulse generation and output circuit. The IN1 and IN2 of the EMI filtering circuit access AC380V voltage, and through a filter LL6, the voltage is output to a control transformer through an OUT1 and an OUT2. Through the voltage transformation rectifying filtering voltage stabilizing circuit, the voltage is transformed to AC28V and AC9V, and through rectification, filtering, and voltage stabilization, DC5V and DC24V are output to an operating circuit to supply power. The system is advantaged by simple structure, complete functions, and convenient adjustment. Net voltage automatic compensation and high anti-interference functions make the controller can reliably and stably operate in environment of unstable power grid voltage and high-strength electromagnetic interference. A current slowly-rising function effectively restricts welding spark from splattering, and welding spots are firmer.

Description

technical field [0001] The invention relates to the technical field of resistance welding machines, in particular to a control system of resistance spot welding machines. Background technique [0002] At present, most of the common spot welding machine controllers have complex circuits, single control mode, poor anti-interference effect, no network voltage compensation, and current ramp-up function; when the grid voltage is unstable and the working environment has electromagnetic interference, it will cause welding Unstable, large spatter, poor quality and consistency of solder joints. Contents of the invention [0003] The purpose of the present invention is to provide a spot welding machine control system, which has the advantages of simple structure, perfect function and convenient adjustment. [0004] The technical solution adopted by the present invention to solve the technical problem is: a spot welding machine control system, including EMI filter circuit, voltage t...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the common spot welding machine controllers have complex circuits, single control mode, poor anti-interference effect, no grid voltage compensation, and current ramp-up function; when the grid voltage is unstable and the working environment has electromagnetic interference, it will cause welding Unstable, large spatter, poor quality and consistency of solder joints

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