基于80C196KC控制的交变磁控电源研究

Research on alternating current magnetron power supply based on 80C196KC

为了使大电流下的熔化极气体保护焊(GMAW)应用于工业生产中,研制了一台交变磁控电源,作用于和焊枪同轴的励磁线圈,产生纵向交变磁场,使大电流下旋转射流过渡可控,从而提高焊接效率。该电源采用16位的80C196KC单片机作为主控芯片,主电路采用双逆变结构,前级为半桥逆变结构实现恒电流输出,后级逆变控制输出方波交流的频率、占空比。该磁控电源设计了数字化的人机界面,并且具有过热、过电流以及过/欠电压等保护功能,保证了电源的可靠运行。结果表明,研制的磁控电源能产生励磁电流、频率以及占空比可调的交变电流,作用于励磁线圈来控制不稳定的旋转射流过渡。

In order to apply the gas metal arc welding(GMAW)with high current to industrial production,an alternating magnetron power supply is developed,which acts on the excitation coil coaxial with the welding torch and generates a vertical alternating magnetic field,so that the rotating spray transfer with high current could be controlled to increase welding efficiency.The power supply uses 16-bit 80C196KC MCU as the main control chip and the main circuit adopts double inverter structure.The primary inverter has a half-bridge inverter structure to realize constant current output and the secondary inverter controls output square wave AC frequency and duty ratio.The magnetron power supply with a digital human-machine interface has protection functions such as overheating,overcurrent,overvoltage and undervoltage to ensure the reliability of the power supply.The results indicates that the developed magnetron power supply could produce alternating current with adjustable excitation current,frequency and duty cycle,which acts on the excitation coil to control the unstable rotating spray transfer.