双向DC-DC直流变换器设计优化  

Design optimization of bidirectional DC-DC converter

作　　者：李金彦[1] LI Jinyan(College of Electrical and Control Engineering,Ningxia Vocational Technical College of Industry and Commerce,Yinchuan 750021,China)

机构地区：[1]宁夏工商职业技术学院电气与控制工程学院,银川750021

出　　处：《中国科技论文》2025年第3期224-230,共7页China Sciencepaper

基　　金：2021年度宁夏工商职业技术学院应用技术研发项目“双向DC-DC直流变换器研发”。

摘　　要：针对双向DC-DC直流变换器(bidirectional DC-DC converter,BDC)充电模式效率低、电流控制精度不高的问题,对BDC的电池储能装置进行优化设计。该装置包括双向DC-DC主电路、测控电路和辅助电源,主电路拓扑为同步整流式非隔离型降压/升压(BUCK/BOOST)电路,采用STM32F103ZET6作为核心控制器,应用软件补偿网络、数字校准技术和比例-积分-微分(proportional-integral-derivative,PID)数字闭环控制技术,实现能量的双向流动。测试结果表明,优化后装置充电模式转换效率高达95%,电流控制误差低于1%,电流变化率低于1%,放电模式转换效率高达96%,大大提高了电能转换效率和电流控制精度。As a countermeasure to the problems of low charging mode efficiency and low current control accuracy in bidirectional DC-DC converters(BDC),an optimized design of the battery energy storage device for BDC was proposed.The device included a bidirectional DC-DC main circuit,a measurement and control circuit,and an auxiliary power supply.The main circuit topology was a synchronous rectifier non-isolated BUCK/BOOST circuit and STM32F103ZET6 was employed as the core controller.Bidirectional energy flow was achieved via applying software compensation network,digital calibration technology,and proportional-integral-derivative(PID)digital closed-loop control technology.The results show that the charging mode conversion efficiency is as high as 95%,the current control error is less than 1%,the current change rate is not greater than 1%,and the discharge mode conversion efficiency is as high as 96%.The optimization of the device greatly improves the effi⁃ciency of energy conversion and the accuracy of current control.

关 键 词：直流变换器 BUCK/BOOST PID数字闭环 转换效率 

分 类 号：TN452[电子电信—微电子学与固体电子学]