中文摘要：

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100ns，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．

英文摘要：

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.