摘要
微型电子元器件的焊接要求焊接电源响应速度快、系统稳定性好以及控制精度高。为进一步提高微型电子元器件的焊接质量,设计了一种基于ARM的精密逆变电阻点焊电源,该电源以STM32F103RCT6型ARM芯片为控制核心,通过调节脉冲宽度(PWM)调制占空比并结合增量式PI控制方案,实现对焊接电流大小的精密控制。详细介绍电流采样电路、真有效值转换电路、IGBT驱动电路及保护电路。试验证明,该电源控制系统稳定可靠、控制精度高,在微电子器件的焊接方面有较好的效果。
The welding of micro-electronic components requires the welding power supply to have fast dynamic responsibility,high control accuracy and high system stability. In order to enhance the welding quality,designed a precise inverter resistance spot welding power supply based on ARM. STM32F103RCT6 is the control core of the power supply. Through adjusting the duty ratio of PWM and using incremental PI scheme to control the welding current. The text detailed introduces current sampling circuit,true-RMS transform circuit,IGBT drive circuit and protection circuit. The experiment results show that the power supply control system is stable and has high control accuracy, which results in good performance of welding micro-electronic components.
出处
《电焊机》
2016年第11期55-59,共5页
Electric Welding Machine
基金
广东省微纳加工技术与装备重点实验室开放基金项目(GDMNML2013-05)
广东省科技计划项目(2012B011300042)
关键词
ARM
电源
电阻点焊
PI控制
ARM
power supply
resistance spot welding
PI control
