四开关Buck-Boost变换器的变频ZVS控制策略  

VARIABLE FREQUENCY ZERO VOLTAGE SWITCHING CONTROL STRATEGY FOR FOUR-SWITCH BUCK-BOOST CONVERTER

作　　者：刘述喜 邓瑞祥 郭强 Liu Shuxi;Deng Ruixiang;Guo Qiang(School of Electrical and Electronic Engineering,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆理工大学电气与电子工程学院,重庆400054

出　　处：《太阳能学报》2025年第4期210-219,共10页Acta Energiae Solaris Sinica

基　　金：重庆市教委科学技术研究计划(KJQN202001128)。

摘　　要：为实现四开关Buck-Boost变换器的高效率,需通过降低电感电流有效值减小功率器件的导通损耗。分析四边电感电流控制,可发现电感电流有效值在轻载条件下可达到最小,但在重载条件下难以保持。为此,提出一种四开关Buck-Boost变换器的低电感电流有效值变频软开关控制策略,以满足重载需求。同时,考虑输入输出电压相近时电感电流变化率较小,优化时间段的选择,限制变频范围过大,以此降低硬件设计的难度。在实验室中研制了输入电压为10~40 V、输出电压为15~35 V的实验样机,并通过实验验证所提出控制策略的可行性和优越性。The FSBB converter to achieve high efficiency,need by reducing the inductor current root mean square(RMS)and the conduction loss of power devices.It is found that the RMS of the inductor current can reach the minimum under the condition of light load,but can not be maintained under the condition of heavy load.For this,put forward a kind of FSBB converter low inductor current RMS control strategy,in order to satisfy the demands of overloading by a variable frequency ZVS control.At the same time,considering inductor current rate of similar input and output voltage is small,can optimize the selection of the time to limit variable frequency range that reduce the difficulty of the hardware design.An experimental prototype with an input voltage of 10-40 V and an output voltage of 15-35 V has been developed in the laboratory,and the feasibility and superiority of the proposed control strategy have been verified by experiments.

关 键 词：DC-DC变换器 零电压开关 数字控制系统 四开关Buck-Boost变换器 四边电感电流 

分 类 号：TM46[电气工程—电器]