交错并联磁集成DC-DC变换器的控制策略研究  

Research on Control Strategy of Interleaved Parallel Magnetic Integrated DC-DC Cconverter

作　　者：姚鑫 王凤岩 YAO Xin;WANG Fengyan(The 29th Research Institute of CETC,Chengdu 610000,China;Sichuan Provincial Engineering Research Center of High Efficiency Power Converter Technology,Chengdu 610000,China)

机构地区：[1]中国电子科技集团公司第29研究所,成都610000 [2]四川省高效电源变换技术工程研究中心,成都610000

出　　处：《计算机测量与控制》2025年第3期97-104,共8页Computer Measurement &Control

摘　　要：为提升交错并联磁集成DC-DC变换器抗干扰能力及均流效果,设计一种由线性自抗扰和比例积分调节器串联的控制策略;通过建立交错并联磁集成DC-DC变换器模型,分析其工作模态,建立小信号模型推导变换器传递函数;设计电流内环为比例积分均流解耦控制,防止因为相电路参数差异可能引起相间不均流问题,影响到整个变换器的运行可靠性,电压外环为线性自抗扰控制,提升系统抗干扰能力,通过设计扩张状态观测器和线性状态误差反馈控制器实现对系统的高精度控制;在matlab/simulink中对传统PI双闭环控制策略和提出的LADRC-PI解耦均流控制策略进行仿真验证对比,并搭建实验平台进行样机实验;仿真结果和实验结果表明所提控制策略有更强的抗干扰能力和均流能力。To improve the anti-interference capability and current-sharing performance of interleaved parallel magnetic integrated DC-DC converters,this paper designs a control strategy with the series connection of linear active disturbance rejection control(LADRC)and proportional-integral(PI)regulator,analyzes its operating modes by establishing an interleaved parallel magnetic integrated DC-DC converter model,and builds a small-signal model to derive the converter s transfer function.The current inner loop is designed as a PI current-sharing decoupling control to prevent uneven current distribution between phases caused by parameter differences,which affects the overall reliability of the converter.The voltage outer loop employs the LADRC to enhance the system s anti-interference capability.A high-precision control system is achieved by designing an extended state observer(ESO)and a linear state error feedback(LSEF)controller.In MATLAB/Simulink,the traditional PI dual-loop control strategy is compared with the proposed LADRC-PI decoupling current-sharing control strategy by simulation,and an experimental platform is built for prototype testing.Simulation and experimental results demonstrate that the proposed control strategy has stronger anti-interference capability and current-sharing performance.

关 键 词：交错并联 耦合电感 自抗扰控制器 均流控制 抗干扰 

分 类 号：TM46[电气工程—电器]