【作者】 王飞； 刘永红； 唐泽民； 陈志礼； 纪仁杰； 张彦振；

【Author】 Wang Fei,Liu Yonghong,Tang Zemin,Chen Zhili,Ji Renjie,Zhang Yanzhen (China University of Petroleum,Dongying 257061,China)

【机构】 中国石油大学(华东)机电工程学院；

【摘要】 以现场可编程门阵列(FPGA)为基础构建了频率可达1 MHz的高频电火花脉冲电源,在FPGA中设计了键盘模块、PWM模块等,对光耦隔离电路和MOS管驱动电路进行了设计。随着MOS管开关频率的提高,其关断时的尖峰电压会越来越明显,所以在电源中设计了MOS管的尖峰电压吸收电路,通过使用不同的器件比较,得到在尖峰电压吸收电路中,当电阻是10Ω,电容是0.01μF,且在添加了快速恢复二极管时,可较充分地吸收尖峰电压。经试验证明,该电源电路结构简单,布线灵活,与传统电源相比驱动电路功率大,MOS管开关速度更高,采用特殊尖峰电压吸收电路,该脉冲电源可产生高于1 MHz的波形较好的电火花脉冲波形,在高频时波形更整齐。更多还原

【Abstract】 Based on the FPGA and the MOSFET,the high frequency electrical discharge pulse generator has been designed,which can generate 1MHz pulse.The keyboard module and the PWM module are designed on the FPGA.This article describes the design of the drive circuit and the design of the optical coupler circuit.With the increase of the frequency of the EDM pulse generator,the peak voltage increases when the MOSFET is shut off.So the buffer circuit of the peak voltage is designed,after the comparison of some components,the combination of the components is got.When the value of the register is 10Ω,the value of the capacitance is 0.01 uF,and the fast recovery diode is added to the buffer circuit,most of the peak voltage can be absorbed.Through analysis of the tests,this new kind of EDM pulse generator is more simple than the traditional,and the EDM pulse generator can generate 1MHz pulse.更多还原