基于NE555方波脉冲发生器的设计及应用  

Design and application of square-wave pulsed generator based on NE555

作　　者：文华兵 陈常婷[1] 刘频[1] 

机构地区：[1]南昌航空大学,江西南昌330063

出　　处：《现代电子技术》2014年第11期138-139,144,共3页Modern Electronics Technique

摘　　要：为了进行铝合金脉冲MIG焊实验,将NB-500晶闸管直流弧焊电源改造成脉冲电源,采用NE555时基集成电路,设计了频率、占空比、峰值和基值均可独立调节方波脉冲发生器。该方波脉冲发生器与NB-500焊机原有控制电路相结合,系统工作稳定,实现了铝合金脉冲MIG焊接。The NB-500 Thyristor DC arc welding power supply was transformed into a pulsed welding power supply for ex-periments of aluminum alloy pulsed MIG weld. The square-wave pulse generator whose frequency,duty cycle,peak and base value could be adjusted independently was designed by using NE555 time-base integrated circuit. The generator is combined with original control circuit of NB-500 welding machine. The system works stable and can realize the pulsed MIG weld of alumi-num alloy.

关 键 词：时基集成电路 脉冲发生器 弧焊电源 MIG焊接 

分 类 号：TN782.34[电子电信—电路与系统]