摘要
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。
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 .
出处
《仪表技术与传感器》
CSCD
北大核心
2015年第11期42-44,48,共4页
Instrument Technique and Sensor
基金
国家自然科学基金资助项目(61361011
61274077
61464003)
广西自然科学基金资助项目(2013GXNSFAA019335)
关键词
高精度
电流源
预稳压
STM32
high-precision
current source
pre-regulator
STM32
