电子负载样机设计-.DOCVIP

基于STM32的程控直流电子负载设计 莫 熙1，周 伟2，窦晓波1，黄冬冬1，曹 翔1，孙 旻3，赵 波4 （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） 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寄生电容引起的消除PI调节器、滤波器的设计所提出的电子负载设计方案制作了样机对抑制 关键词:电子负载；STM32；PI调节器 中图分类号：TM930.2 文献标识码：B 文章编号：1001-1390（2014）00-0000-00 STM32DC Electronic Load Design MO Xi1, ZHOU Wei2, DOU Xiao-bo1, HUANG Dong-dong1, CAO Xiang1, SUN Min3, ZHAO Bo4 (1. School of Electrical Engineering, Southeast University, Nanjing 210096, China. 2. School of Electronics and Information Engineering, Tongji University, Shanghai 201804, China. 3. Jiangxi Electric Power Research Institute， Nanchang 330096，China4. Zhejiang Electric Power Test Research Institute, Hangzhou 310014, China) Abstract: 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 multichannel 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. Keywords: DC electronic load, STM32, PI regulator 引 言 在测试电源性能时，往往需要接入不同性质、阻值的负载，传统的测试方法存在很的局限性电阻元件连续无法满足需求特殊的负载需求）*基金项目：国家高技术研究发展计划（863计划）项目（2014AA05200