基于STM32的程控直流电子负载设计  

STM32 Based Programmable DC Electronic Load Design

作　　者：莫熙 周伟[2] 窦晓波[1] 黄冬冬[1] 曹翔[1] 孙旻[3] 赵波 

机构地区：[1]东南大学电气工程学院,南京210096 [2]同济大学电子与信息工程学院,上海201804 [3]江西省电力科学研究院,南昌330096 [4]浙江省电力试验研究院,杭州201804

出　　处：《电测与仪表》2014年第18期85-91,共7页Electrical Measurement & Instrumentation

基　　金：国家高技术研究发展计划(863计划)项目(2014AA052002);国家自然科学基金资助项目(51307023);江苏省基础研究计划项目(BK20130624);2012年度中欧中小企业节能减排科研合作项目;国家电网公司项目(52110113091H);分布式规模化接入配网就地消纳关键技术研究项目(52110113091H);省级电网运行控制协调优化技术研究与示范

摘　　要：从程控直流电子负载的整体设计方案入手,采用STM32F103VCT6作为中央控制器,运用多通道AD技术对多路并联的MOSFET上的电压及各支路电流进行实时监测,控制工作在线性状态的MOSFET上的电流,以实现电子负载的恒流、恒压、恒功率和恒电阻4个功能。详细研究了MOSFET寄生电容引起的自激振荡及消除方法以及PI调节器、滤波器的设计,提出了一种提高多路MOSFET并联的电子负载的稳定性的方法。针对所提出的电子负载设计方案制作了实验样机,并对其进行了测试、分析和再优化。仿真和实验结果证明,所设计的电子负载具有较高的稳定性,有效抑制自激振荡,最大耐流30A,耐压90V,最大功率150W。Taking view of the overall design scheme of programmable DC electronic load, STM32F103VCT6 will be used as the central control unit. The voltage and each branch current of muhichannel parallel MOSFET will be real- time monitored by multichannel AD technique. The MOSFET current in linear state will be controlled so as to realize constant current, constant voltage, constant power and constant resistance. Self-oscillation produced by MOSFET stray capacitance and the relative elimination method will be studied deeply, and the design of PI regulator and filter will also be discussed. A new method to improve the stability of multichannel MOSFET parallel electronic load will be proposed in this paper. Moreover, the relative experimental prototype has been made out, which has been tested, analyzed and optimized. Simulating results show that the proposed electronic load possesses high stability and will suppress the self-oscillation effectively with the maximum current 30A, withstand voltage 90V,and the maximum power 150W.

关 键 词：电子负载 STM32 PI调节器 

分 类 号：TM930.2[电气工程—电力电子与电力传动]