摘要
峰值电流控制方式是PFC开关变换器的一种常用方式,由于输入电压的时变性造成在输入交流电压过零点处出现输入交流电流的快时标分岔现象,该现象会严重影响PFC变换器的性能,因此采用一种合理有效的分岔控制手段是非常重要的。文中深入分析了峰值电流控制PFC变换器工作原理,从理论上分析了PFC变换器出现快时标分岔现象的根源。在谐振分岔控制理论的基础上提出了一种比较有效的控制器参数选择方法,可以较好地实现PFC变换器的快时标分岔控制,因此改善了PFC变换器的性能。理论结果得到了数值仿真分析和实验的验证。
The peak current control is widely used in controlling power factor correction （PFC） converters. The fast time scale bifurcations appear in zero-crossing of input alternating current due to the time variation of input voltage. This instable phenomenon can seriously affect the performance of PFC converters. It is very important to take some measures to control the bifurcations in PFC. Theory of operation of PFC based on peak current control is analyzed in detail. The basic theory of causing the bifurcations in PFC converters is derived from theory analysis. The optimal method of selecting parameters of controller is proposed based on the resonant bifurcation control theory. The performance of PFC converters can be improved by eliminating the bifurcations of input current. The method of controlling bifurcations in PFC is verified by the numeric analysis simulations and experimental result.
出处
《电工技术学报》
EI
CSCD
北大核心
2010年第8期91-98,共8页
Transactions of China Electrotechnical Society
基金
西北工业大学基础研究基金资助项目(JC200915)
关键词
PFC变换器
峰值电流控制
快时标分岔控制
PFC converters
peak current control
control of fast time scale bifurcations
