采用可削减直流偏磁集成磁件Cuk变换器的结构简化  

Simplification of Cuk converter whose dc-bias in integrated magnetics can be reduced

作　　者：杨玉岗[1] 李洪珠[1] 寇玉生[1] 

机构地区：[1]辽宁工程技术大学电控学院,辽宁葫芦岛125105

出　　处：《辽宁工程技术大学学报（自然科学版）》2008年第5期717-720,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(50207004)

摘　　要：在开关电源中存储和传递直流功率,会在其磁性元件中产生较大的直流偏磁,限制了磁件铁芯利用率和开关电源性能的提高,而现有可削减直流偏磁Cuk变换器存在元件多、结构和控制复杂等问题,为了研究一种既可以削减磁性元件的直流偏磁,又可以使电路拓扑结构简单的开关变换器,在分析可削减直流偏磁Cuk变换器原理的基础上,提出了一种采用可削减直流偏磁集成磁件Cuk变换器的简化结构,分析了集成磁件的工作状态,进行了电路仿真和实验研究,使经过简化的电路比原电路减少了一条包括电容和开关器件的支路,并将可控开关器件由四个减少为一个,仿真和实验验证了提出的采用可削减直流偏磁集成磁件Cuk变换器的简化结构是可行的。There is a big DC-bias in the core of the magnetics as storing and transferring DC power in switched power supply, the big DC-bias restricts the increase of the magnetic core＇s utilization ratio and the improvement of the power supply＇s performance. However, there are some disadvantages such as more components and complicated circuit topology and control in existing Cuk converter whose integrated magnetics＇ DC-bias can he reduced. The object of this paper is to develop a new switching converter, in which not only the DC-bias can be reduced, but also the circuit topology is simple. On the basis of analyzing the theory of Cuk converter whose DC-bias can be reduced, this paper proposes an simplified topology structure of Cuk converter whose integrated magnetics＇ DC-bias can be reduced, analyzes the integrated magnetics＇ operational state, simulates the circuit and gives a experiment study. As a result, a branch including a capacitor and a switch is eliminated in the simplified topology structure, and the controllable switches are reduced to only one from fours. The simplified topology structure of Cuk converter whose DC-bias can be reduced is verified by the simulation and experiment.

关 键 词：CUK变换器 集成磁件 直流偏磁 简化拓扑结构 

分 类 号：TM46[电气工程—电器]