点焊机群的限容控制系统

Control System for Limiting General Energized Capacity of Spot Welder Group

本系统利用点焊机负载持续率低的特点，根据预定的限值，对同时通电焊机总容量进行限制，从而稳定了电网电压及焊接电流，保证了点焊机群的焊接质量。本文介绍了该系统的意义、原理、总体结构，给出了单机控制器的联机方法及ＫＤ７－１控制器联机的实例，讨论了主程序及几个子程序，最后介绍了使用效果。

This system makes use of the characteristic of low duty cycle of spot welder to limit the general energized capacity of a spot welder group at any time within a pre-set limit. Thereby, it stabilizes main voltage and welding current,and enssures welding quality of the welder group.The principle and significance of the system are introduced in this paper.The communication method of one timer with the control system,and its example with KD 7-1 timer are given.The master-program and some sub-proograms are discussed.