摘要本试验以模拟式逆变焊接电源系统为基础，提出将其改进成适合铝合金焊接的数字化逆变焊接电源系统的方案，以实现对焊接过程的电流、电压、功率的精确控制。试验中，分析了模拟式逆变焊接电源的结构和工作原理，设计了信号采集电路和基于DSP控制芯片TMS320F28033的系统控制电路并对电路进行调试，最终完成了整套系统的组装。改进后的逆变数字脉冲焊接系统以全桥逆变电路为主电路，控制信号由以DSP控芯片TMS320F28033为核心的系统控制电路发出，保证对主电路，送丝调速电路和全桥驱动电路的实时、精确地控制。此外还设计了接口电路，用于连接通讯电路，实现与控制面板的连接，网络化和其他功能的扩展。67698
毕业论文关键词：逆变 控制电路 数字化 TMS320F28033
毕业设计说明书（论文）外文摘要
Title Digital pulse inverter weldin control technology
Abstract
Based on an analog inverter welding power supply system, A scheme for improving it to a digital pulse inverter welding power system is proposed to accomplish current, voltage and power precisely controlled. In this experiment the structure and working principle of the analog inverter welding power supply is analyzed then a signal acquisition circuit and a control circuit based on DSP chip TMS320F28033 is designed. The entire system is assembled after all circuits are tested. The main circuit of the digital pulse inverter welding system is full-bridge inverter circuit and the control signal is send out from the control circuit to ensure the main circuit, wire feed circuit and full-bridge driver circuit can be real-time and precisely controlled. the interface circuit connected to communication circuit is designed for extending function such as connecting to the control panel, networking and other features .
.
Keywords: Inverter Control circuit Digital TMS320F28033
目 录
1.1 课题的研究意义 1
1.3 本课题研究内容 5
2 传统逆变式CO2焊接电源系统的分析 5
2.1 传统逆变式CO2焊接电源系统的总体分析 5
2.2 主电路 5
2.3 全桥驱动电路 7
2.4 送丝调速电路 8
3 传统逆变式CO2脉冲焊接电源系统的数字化改进 10
3.1 信号采集电路 10
3.1.1 数字系统供电模块 11
3.1.2 电流、电压的采集电路 11
3.2 逆变式焊接电源数字控制系统设计 13
3.2.1 芯片TMS320F28033 14
3.2.2 控制板供电电源电路 16
3.2.3 时钟电路 17
3.2.4 复位电路 17
3.2.5 JTAG仿真接口 19
3.3 数字焊机外围接口电路 20
3.3.1 脉宽调制电路 DSP逆变焊接电源数字控制技术研究:http://www.751com.cn/cailiao/lunwen_75975.html