公开(公告)号：US09419531B2

公开(公告)日：2016-08-16

申请号：US14233675

申请日：2012-07-23

申请人： Hu Zhilun ,  Yilei Gu ,  Zhiwei Wen ,  Changdan Zhang

发明人： Hu Zhilun ,  Yilei Gu ,  Zhiwei Wen ,  Changdan Zhang

IPC分类号： H02M3/335 ,  H02M1/00

CPC分类号： H02M3/3353 ,  H02M3/33507 ,  H02M3/33523 ,  H02M3/33538 ,  H02M3/33553 ,  H02M3/33569 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

摘要： A forward-flyback DC-DC converter topology includes a transformer, a main switch, a clamp circuit, first and second rectifying switches, an LC resonant circuit and an output capacitor; a primary winding of the transformer and the main switch are connected in series between a first input terminal and a second input terminal, the clamp circuit constituted by a clamp capacitor and a clamp switch connected in series is connected in parallel with the primary winding or with the main switch, a secondary winding of the transformer includes a forward winding and a flyback winding, a terminal of the primary winding through which current flows into is a dotted terminal of the primary winding, and a connecting mode of a secondary side of the transformer is: the dotted terminal of the forward winding being connected with a first output terminal via the first rectifying switch, a dotted terminal of the flyback winding being connected with a second output terminal via the second rectifying switch, the LC resonant circuit being connected with the first and the second output terminals and an unlike terminal of the forward winding and the flyback winding so that the first and the second rectifying switches implement zero-current switching, and the output capacitor being connected between the first and the second output terminals.

摘要翻译： 正向反激式DC-DC转换器拓扑包括变压器，主开关，钳位电路，第一和第二整流开关，LC谐振电路和输出电容器; 变压器和主开关的初级绕组串联连接在第一输入端和第二输入端之间，由钳位电容器和串联连接的钳位开关构成的钳位电路与初级绕组并联连接，或与 主开关，变压器的次级绕组包括正向绕组和反激绕组，电流流入的初级绕组的端子是初级绕组的点线端子，并且变压器的次级侧的连接模式 是：正向绕组的点状端子经由第一整流开关与第一输出端子连接，反激绕组的虚线端子经由第二整流开关与第二输出端子连接，LC谐振电路与 第一和第二输出端子以及正向绕组和反激绕组的不同端子，使得第一和第二 整流开关实现零电流开关，输出电容器连接在第一和第二输出端子之间。