具有宽参数稳定域的功率因数校正变换器的CCM/DCM通用控制方法研究

针对传统功率因数校正变换器控制方法依赖工作模式（CCM和DCM）以及参数稳定域约束应用范围的问题，本项目将基于电路中的能量守恒原理探索一种CCM/DCM通用的控制方法，其特点是不依赖工作模式，且参数稳定域更宽。项目首先通过建立开关周期内的能量平衡方程推导CCM和DCM都适用的控制电路，以期在宽负载范围得到低畸变率的输入电流，实现高功率因数入网。其次，采用动力学的方法对该控制方法下的系统运行稳定性进行分析，确定其参数稳定域。并与其它控制方法比较，以期证实其具有更宽的参数稳定域，从而拓宽变换器的应用范围。本项目在理论方面的工作将探索能量平衡原理用于各类PFC变换器的可能性，同时，动力学分析中根据所提出控制方法的特点对常用非线性建模方法所做出的改进试图在一定程度上推动分段光滑电路中对新颖控制的非线性研究的发展；在工程应用方面旨在实现具有宽参数稳定域的CCM和DCM通用控制的功率因数校正变换器。

For the problems that the control methods of the PFC converter depend on the current conduction mode （CCM or DCM）and parameters stability domain limits the application range, this proposal will try to find a CCM/DCM universal control method based on the energy conservation principle, the characteristic of which are independent of the operation modes and has wide parameter stability domain. By establishing the energy balance control equation in a switching cycle, the proposal will derive the control circuit that is applicable to both CCM and DCM, then low THD input current and high power factor can be achieved. .Then the stability analysis of the system controlled by the proposed control method is studied using the dynamic methods. The influence of the main circuit parameters to the operation performances of this converter is analyzed. Then the choice of converter parameters needed for stable operation range is clear and the goal of optimization of converter parameters is achieved. Meanwhile, compared with other control methods, wider parameter stability domain of the converter with the proposed control method is confirmed, which greatly increases the application range of the converter..The theoretical work of this proposal will investigate the possibility of the energy balance principle to control all kinds of PFC converters and to some degree, the improvements to the commonly used nonlinear modeling methods according to the characteristic of the proposed control method will promote the development of the nonlinear research of piecewise smooth circuit using novel control method; The application work of this proposal will achieve a CCM/DCM universal controlled PFC converters with wider parameter stability region.