摘要
脉冲电源是实现高精度电解加工的关键技术之一.文中研制了一种用于微细电解加工的超短脉冲——纳秒级脉冲电源,其最小稳定输出脉宽为100 ns,额定电流为1A,占空比和频率均独立可调.该电源采用直流加斩波输出方案,直流部分采用稳压集成块调压.设计的高频信号发生器工作频率范围宽;驱动信号具有陡峭的上升和下降沿,为斩波器提供了良好的驱动保证.斩波主器件采用快速互补功率场效应管,解决了波形失真问题.文中还针对微细电解加工工艺的特点设计了快速保护电路,实现了高精度的微细电解加工.最后,利用该电源样机加工出典型微细零件,验证了电源的有效性.
Pulse power supply is one of the key components of high-accuracy micro-electrochemical machining （ECM）. In this paper, a nanosecond ultrashort pulse power supply for micro-ECM is designed and fabricated, with a minimum stable pulse width of lOOns and a rated current of 1A. In the developed power supply with independent duty-cycle and frequency adjustments, the scheme of DC-plus-chopper is adopted; an integrated block is employed to adjust the DC voltage; and a high-frequency signal generator with wide working frequency is used to provide the chopper with driving waveform possessing nano-second rise time and fall time. A complementary MOSFET is applied to the chopper circuit to avoid the waveform distortion during the machining. Moreover, a fast over-currentprotection circuit is designed according to the characteristics of micro-ECM to ensure the machining accuracy. The effectiveness of the developed power supply is finally verified by the machining experiments of some typical micro parts.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第8期75-78,共4页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(50675036
50475046)
广东省科技计划项目(2005B10201007)
关键词
超短脉冲电源
纳秒级脉冲
微细电解加工
斩波
ultrashort pulse power supply
nanosecond pulse
micro-electrochemical machining
chopping
