具有快速动态响应的三态功率因数校正变换器  

Tri-state Boost PFC converter with fast dynamic response

作　　者：张斐[1] 许建平[1] 王金平[1] 于海坤[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《电机与控制学报》2011年第1期13-19,25,共8页Electric Machines and Control

基　　金：国家自然科学基金(50677056);国家科技支撑计划项目(2009BAG12A05);中央高校基本科研业务费专项资金(SWJTU09ZT13)

摘　　要：提出一种三态Boost功率因数校正电路及其相应的系统控制策略,采用DSP实现系统的全数字控制。通过在Boost变换器电感两端并联开关管,使Boost变换器工作在伪连续导电模式从而获得2个控制自由度并实现控制环路的解耦。详细分析三态Boost功率因数校正变换器的工作原理和控制方法,不但解决了不连续导电模式Boost功率因数校正变换器不能应用于中大功率场合和连续导电模式Boost功率因数校正变换器控制电路设计复杂的问题,而且还具有良好的功率因数校正能力,拓宽了Boost功率因数校正变换器的负载范围,并提高了Boost功率因数校正变换器的动态响应速度。通过一台400W的实验样机验证了理论分析的正确性。Tri-state Boost power factor correction（PFC） converter and its corresponding control strategy are proposed.By connecting a switch in parallel with the inductor of Boost converter,the Boost converter operated in pseudo continuous conduction mode（PCCM）,which provided an additional degree of control-freedom and decoupled the control variable of the control loop.The operation principle of the tri-state Boost PFC converter was analyzed.It overcame the limitation of the output power of converter in discontinuous conduction mode（DCM）.Compared with converter operating in continuous conduction mode（CCM）,the controller design of tri-state Boost PFC converter is much simpler.It can not only obtain good power factor correction,but also extend the power range of Boost PFC converter,with improved dynamic response.A 400W prototype of the tri-state Boost PFC converter was built and the experimental results verify the analysis results.

关 键 词：三态变换器 连续导电模式 不连续导电模式 快速动态响应 功率因数校正 伪连续导电模式 

分 类 号：TM44[电气工程—电器]