Time sequence control circuit and method for realizing constant-speed wire feeding

Abstract

The invention relates to a time sequence control circuit and method for realizing constant-speed wire feeding. The circuit comprises a wire feeder driving module, a current / voltage sampling module, a time sequence control module, a wire feeding motor, a follow-current catching diode and a current sampling sensor, wherein the wire feeder driving module is used for driving a wire feeder through pulse working voltage; the current / voltage sampling module is used for collecting working current and electromotive voltage of the wire feeder and sending collected data to the time sequence control module; and the time sequence control module is used for processing fed back by the current / voltage sampling module and sending a control signal to the wire feeder driving module. By adoption of the time sequence control circuit and method for realizing constant-speed wire feeding, the wire feeder can keep constant-speed wire feeding under different loads and different resistances, has the advantages of being accurate in speed control, high in response speed, stable in wire feeding and low in cost, and has wide application range.

Description

technical field [0001] The present invention relates to the technical field of welding power supply, in particular to the technical field of timing control of wire feeding, in particular to a timing control circuit and method for realizing constant-speed wire feeding. Background technique [0002] There are three types of wire feeding systems in the market. The first one is wire feeding voltage feedback and constant voltage control technology. The advantage is that the control circuit is simple and the cost is low. The wire feeding system is stable and wire feeding at a constant speed; the second is to take the wire feeding voltage feedback and add current compensation control technology. The advantage is that it can improve the stability of wire feeding when it is affected by the load and wire feeding resistance. When the wire resistance is affected, constant wire feeding cannot be guaranteed, and the adjustment response is slow; the third is the wire feeder with grating sp...

AI Technical Summary

Problems solved by technology

[0002] There are three types of wire feeding systems in the market. The first one is wire feeding voltage feedback and constant voltage control technology. The advantage is that the control circuit is simple and the cost is low. The wire feeding system is stable and wire feeding at a constant speed; the second is to take wire feeding voltage feedback and add current compensation control technology. The advantage is that it can improve the stability of wire feeding when it is affected by the load and wire feeding resistance. When the wire resistance is affected, constant wire feeding cannot be guaranteed, and the adjustment response is slow; the third is the wire feeder with grating speed measurement feedback control technology, which has the advantage of not being affected by wire feeding load and resistance, ensuring constant wire feeding and precise control , fast response, the disadvantage is that the control circuit is complex, the wire feeder is large in size and high in cost

Images