公开(公告)号：US20050174813A1

公开(公告)日：2005-08-11

申请号：US11044381

申请日：2005-01-26

Applicant: Sen Dou ,  Dong Lin ,  Dao Xu ,  Jun Duan ,  Alpha Zhang

Inventor： Sen Dou ,  Dong Lin ,  Dao Xu ,  Jun Duan ,  Alpha Zhang

IPC: H02M3/335 ,  H02M3/18

CPC classification number: H02M3/33592 ,  H02M2001/007 ,  Y02B70/1475

Abstract: This invention provides an AC-to-DC power converter that improves the overall conversion efficiency especially that at the minimum input ac voltage for universal input operation design by adopting a new combination of control strategies and topologies for the PFC pre-regulator and DC-to-DC converter. The PFC pre-regulator was arranged to provide a regulated bus voltage of which the amplitude is varied in accordance with input ac voltage by a follower boost controller to achieve best efficiency in minimum input ac voltage operation. A synchronous rectifier dual boost PFC pre-regulator was present for further reduction of the power loss in the converter. Symmetrical half-bridge or symmetrical full bridge switch devices were arranged for the primary side of DC-to-DC converter and synchronous rectification circuit with two synchronous rectifier were arranged for the secondary side of the DC-to-DC converter as combination of the AC-to-DC converter. The two synchronous rectifiers were controlled to turn on and turn off complementary to that to the primary half-bridge switch devices to insure a minimized power loss of that converter stage for the extended bus voltage operation design.

Abstract translation: 本发明提供了一种AC到DC功率转换器，其通过采用控制策略和PFC预调节器和DC-to的拓扑结构的新组合来提高整体转换效率，特别是用于通用输入操作设计的最小输入交流电压 -DC转换器。 PFC预调节器被布置成提供调节总线电压，其中幅值根据随动升压控制器的输入交流电压而变化，以在最小输入交流电压操作中实现最佳效率。 存在同步整流器双升压PFC预调节器，用于进一步降低转换器的功率损耗。 配置对称半桥或对称全桥开关器件，用于DC-DC转换器的初级侧，并配有两个同步整流器的同步整流电路用于DC-DC转换器的次级侧，作为AC 直流转换器。 控制两个同步整流器导通和截止与主半桥开关器件互补的整流器，以确保用于扩展总线电压操作设计的该转换器级的最小功率损耗。