基于DDS的数字脉冲电火花沉积电源研究  

Research on Digital Pulse Electric Spark Deposition Power Supply Based on DDS

作　　者：刘宇[1] 高洋 张诗奇 杜姗 张生芳[1] 王紫光 LIU Yu;GAO Yang;ZHANG Shiqi;DU Shan;ZHANG Shengfang;WANG Ziguang(School of Mechanical Engineering,Dalian Jiaotong University,Dalian 116028,China;Zhejiang Linix Motor Co.,Ltd.,Jinhua 322118,China)

机构地区：[1]大连交通大学机械工程学院,辽宁大连116028 [2]浙江联宜电机有限公司,浙江金华322118

出　　处：《电加工与模具》2024年第1期26-30,51,共6页Electromachining & Mould

基　　金：辽宁“百千万人才工程”培养经费项目(2021921025);辽宁省自然科学基金面上项目(2022-MS-340)。

摘　　要：在电火花沉积加工中,脉冲电源的放电参数对沉积效果和加工效率有重要影响。针对传统电火花沉积电源放电参数可控性差的问题,基于直接数字频率合成(DDS)技术全数字化调制、输出稳定的特性,设计了一种数字脉冲电火花沉积电源。以单片机和DDS芯片为核心来控制斩波电路输出加工脉冲,可实现放电电压、频率等参数的较精确控制以及宽范围内的无极调节。经测试,控制及驱动模块输出信号稳定、准确且频率误差在1 Hz以内,放电电压波形可控性好,满足电火花沉积加工的要求,可用于电火花沉积加工基础研究。In electric discharge deposition machining,the discharge parameters of the pulse power supply have an important impact on the deposition effect and machining efficiency.Aiming at the problem of poor controllability of discharge parameters in traditional electric spark deposition power supplies,a digital pulse electric spark deposition power supply was designed based on the characteristics of fully digital modulation and stable output using Direct Digital Frequency Synthesis(DDS)technology.Using a microcontroller and DDS chip as the core to control the output of processing pulses in the chopper circuit can achieve precise control of discharge voltage,frequency and other parameters,as well as wide range stepless adjustment.After experimental testing,the output signal of the control and drive module is stable and accurate,with a frequency error of within 1 Hz.The discharge voltage waveform has good controllability and meets the requirements of electric discharge deposition machining.It can be used for basic research of electric discharge deposition machining.

关 键 词：电火花沉积 DDS技术 脉冲电源 可控性 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]