Boost功率因数校正变换器单周期控制适用性的理论分析和实验验证

当输入或者负载跳变时,单周期控制是功率变换器中一种新型的非线性控制策略,单周期就可实现控制目标.然而,单周期控制在功率变换器中的普适性并没有相关研究,限制了它的进一步发展和应用.该文以Boost变换器作为研究对象,引入切换线性系统的概念和理论,基于Boost变换器切换线性系统模型严格证明单周期控制在Boost变换器中的适用性,由此提供一种单周期控制在一般功率变换器中适用性分析方法.在理论研究的基础上,给出了单周期控制Boost变换器实现功率因数校正的一个实际范例.

THEORETICAL ANALYSIS AND EXPERIMENTAL VERIFICATION OF ONE CYCLE CONTROL FEASIBILITY FOR BOOST PFC CONVERTER

One cycle control (OCC) is a novel nonlinear control method for power converters. One cycle control has the ability to realize control objective only one switching cycle in the case of input perturbation or load step. But the universal meaning of OCC for power converters has not been studied yet and so limits its further development and applications. In this paper, Boost converter was given as the study objective, the concept and theory of switched linear systems (SLS) were introduced, and OCC feasibility for Boost converter was strictly proved based on switched linear system model of Boost converter. The work provides a verification method of OCC feasibility for power converters. Based on the theoretical study, Boost converter with OCC was given to realize power factor correction as an example.