摘要
针对传统单相Buck变换器无法满足输出电压纹波低、动态响应快、低压大电流等一些特殊供电需求的问题,本文设计了一种基于PI-模型预测控制(MPC)算法的四相交错并联Buck变换器,首先利用全差分运放搭配抗混叠滤波电路对各相电感电流和输入输出电压进行采样,其次利用运算放大器和比较器搭建滞回比较电路,完成对变换器的过压过流保护,最后主控制器基于PI-MPC算法完成对变换器各开关的精确控制。仿真和实验验证结果表明,所设计的变换器稳态输出电压纹波最大仅为0.5%,稳态时间约为1.23 ms,转换效率最高可达95.8%,具有一定的工程应用价值。
The traditional single-phase Buck converter can not meet some special power supply requirements such as low output voltage ripple,fast dynamic response,low voltage and high current.A four-phase interleaved Buck converter based on PI-model predictive control(MPC)algorithm is designed.Firstly,the inductance current and input and output voltage of each phase are sampled by a fully differential operational amplifier and anti-aliasing filter circuit.Secondly,the hysteresis comparison circuit is constructed by operational amplifier and comparator to protect the converter from overvoltage and overcurrent.Finally,the main controller realizes the precise control of each switch of the converter based on the PI-MPC algorithm.The simulation and experimental results show that the maximum output voltage ripple is 0.5%,the steady-state time is about 1.23 ms,and the conversion efficiency is up to 95.8%,which has certain engineering application value.
作者
杜子桥
苏淑靖
蔡磊
高川
Du Ziqiao;Su Shujing;Cai Lei;Gao Chuan(State Key Laboratory of Dynamic Measurement Technology,North University of China,Taiyuan 030051,China)
出处
《电力电子技术》
2025年第6期102-107,共6页
Power Electronics
基金
国家自然科学基金(51875534)。
关键词
变换器
四相交错并联
滞回比较电路
converter
four-phase interleaved
hysteresis comparison circuit
