CAJ | 학술논문

采用STM32单片机为控制核心，设计了一种0～5 A输出的精密电流源系统。 STM32单片机通过16位A／D芯片检测输出电压和电流值，16位D／A芯片对系统进行电流的程控设置。硬件电路中运用预稳电压跟随电路和稳流电路作为电流源系统的主电路，以此来降低功耗，增加可靠性和精度。所设计的电流源系统具有可预置，可步进调整，可按时间进行电流波形输出等功能和良好的人机交互界面。电流源系统具有工作稳定、纹波电流小、精度高的特点。
채용STM32단편궤위공제핵심，설계료일충0～5 A수출적정밀전류원계통。 STM32단편궤통과16위A／D심편검측수출전압화전류치，16위D／A심편대계통진행전류적정공설치。경건전로중운용예은전압근수전로화은류전로작위전류원계통적주전로，이차래강저공모，증가가고성화정도。소설계적전류원계통구유가예치，가보진조정，가안시간진행전류파형수출등공능화량호적인궤교호계면。전류원계통구유공작은정、문파전류소、정도고적특점。
Abstact:A high-precision current source system with 0~5 A output was designed by using STM 32 microcontroller .The STM32 microcontroller chip senses the output voltage and current through 16-bit A/D, sets system current by16-bit D/A chip.U-sing the preregulator and voltage-followed circuit , high accuracy constant current circuit can reduce the power consumption of the system and increase the reliability and accuracy .The current source can be preset as well as the current can be set and adjusted step by step , by the same time it can make a current waveform according to the time and also this system has a fine interactive in -terface .The system is characterized by good stability , low ripple current and high accuracy .