摘要
简要介绍了PWM的控制原理、IGBT逆变焊接电源的组成和控制方法,同时从沃尔什函数级数出发,说明了正弦函数变换为沃尔什级数的过程并计算出正弦函数的八阶沃尔什级数,给出其输出波形图。根据沃尔什级数,利用数字电路技术设计出沃尔什信号发生器,给出了沃尔什信号发生器的系统框图以及系统的输出波形图。同时介绍了通过单片机和沃尔什信号数发生器控制的正弦中频逆变焊接电源工作原理。
The principle of PWM,the constitute and method of IGBT welding inverter controlled by PWM were briefly introduced.It was illus- trated that the process of sine function transformed to Walsh function,and a 8 rank Walh series was deduced and the waveforms was showed. The Walh signal generator was designed by use of the theories of digit circuit according to Walh series and the diagram of the system as well as its waveforms of output were showed.At the same time,the principle of the middle frequency inverter welding power source was provided which controlled by a MCU and a Walh signal.
出处
《焊接》
北大核心
2007年第1期53-55,共3页
Welding & Joining
关键词
信号发生器
逆变
焊接电源
signal generator
inverter
welding power source
