超短脉冲微细电解加工电源及工艺试验

华南理工大学学报（自然科学版） ›› 2008, Vol. 36 ›› Issue (8): 75-78.

超短脉冲微细电解加工电源及工艺试验

刘小康¹ 李风²

1. 华南理工大学机械与汽车工程学院, 广东广州 510640； 2. 广东工业大学材料与能源学院, 广东广州 510006

收稿日期:2007-09-06 修回日期:2007-11-15 出版日期:2008-08-25 发布日期:2008-08-25
通信作者: 刘小康（1959-），女，副教授，主要从事微细加工技术研究． E-mail:liuxk58@scut．edu．cn
作者简介:刘小康（1959-），女，副教授，主要从事微细加工技术研究．
基金资助:
国家自然科学基金资助项目（50675036,50475046）;广东省科技计划项目（2005810201007）

Ultrashort Pulse Power Supply Applied to Micro-ECM and Corresponding Technique Experiments

Liu Xiao-kang¹ Li Feng²

1. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. Faculty of Material and Energy, Guangdong University of Technology, Guangzhou 510006, Guangdong, China

Received:2007-09-06 Revised:2007-11-15 Online:2008-08-25 Published:2008-08-25
Contact: 刘小康（1959-），女，副教授，主要从事微细加工技术研究． E-mail:liuxk58@scut．edu．cn
About author:刘小康（1959-），女，副教授，主要从事微细加工技术研究．
Supported by:
国家自然科学基金资助项目（50675036,50475046）;广东省科技计划项目（2005810201007）

摘要/Abstract

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．

关键词: 超短脉冲电源, 纳秒级脉冲, 微细电解加工, 斩波

Abstract:

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.

Key words: ultrashort pulse power supply, nanosecond pulse, micro-electrochemical machining, chopping

刘小康李风 . 超短脉冲微细电解加工电源及工艺试验[J]. 华南理工大学学报（自然科学版）, 2008, 36(8): 75-78.

Liu Xiao-kang Li Feng . Ultrashort Pulse Power Supply Applied to Micro-ECM and Corresponding Technique Experiments[J]. Journal of South China University of Technology (Natural Science Edition), 2008, 36(8): 75-78.