摘要
通过对IGBT逆变焊机电源电路的分析,认为其电磁干扰主要来自输入电路电磁干扰、高频噪声、寄生参数引起的共模噪声和功率器件开关过程中产生的超高频噪声。并在软件和硬件设计过程中采用了相应的措施,在硬件设计中主要讨论了检测电路、主控板电源及隔离和接地等措施;在软件设计中主要讨论了软件陷阱技术、数字滤波和"看门狗"技术等。上述措施能够较好地抑制电磁干扰,并且焊机对周围设备的干扰和电网的污染也控制在有关电磁兼容标准指标之内。
Through analysis on power source circuit of IGBT inverter welding machine, it regarded that electromagnetic interference came from common-mode noise which caused by electromagnetic interference of input circuit, high-frequency noise and parasitical parameters, as well as super high frequency noise caused by the switching activities of power device. Some relevant measures were taken in hardware and software, the inspecting circuit, the power source of main control panel and some other measures like insulation and earthing were discussed in hardware design, and in software design, such measures as the software trap, digital fiher,WDT and etc. The above measures can preferably restrain EMI, so that the interferes to other equipment and pollution to the grid can also be controlled in certain standard.
出处
《焊管》
2012年第8期47-50,共4页
Welded Pipe and Tube
关键词
逆变焊机
电源
电磁干扰
抑制
inverter welding machine
power source
electromagnetic interference
restrain
