焊接系统中单相整流的数字控制研究  

Research on digital control of single-phase rectifier in welding

作　　者：周登荣[1] 于贵[2] 

机构地区：[1]攀枝花学院电信学院,四川攀枝花617000 [2]四川文理学院,四川达州635000

出　　处：《电焊机》2013年第3期82-85,共4页Electric Welding Machine

摘　　要：针对早期焊接系统中采用不控整流和可控整流存在的问题,采用IGBT单相整流双向控制解决了焊接时注入电网谐波含量大以及送丝电机和行走电机反转时电能自身消耗造成电能损失的问题。采用四象限整流控制方法,迫使整流输入端的电压与电流同相位,同时通过电压和电流控制方法,把电机的制动电能反馈给电网,仿真和实验验证本研究提出方法的可行性。因此,四象限整流器控制策略的选择,对于提高电网功率因数、降低网侧电流谐波含量、稳定中间直流电压以及保证电机侧逆变器的正常工作有着重要的作用。For the feature of running and techniques configuration in the high-power electric-welding, To sampling output current and voltage of load and digital PI control to current and voltage.h is used with DSP to control performance and function in the welding.Use double PI control by DSP and control six scr＇s gradation trigger and trigger angle to control wilding＇s current and voltage.Finally, the experiments prove that the three-phase rectifier can have good precision.The control method can not only realize the functions of the whole system, but also run more precisely and steadily.

关 键 词：单相整流 IGBT 四象限整流 功率因数 

分 类 号：TG457.11[金属学及工艺—焊接]