公开(公告)号：US07167383B2

公开(公告)日：2007-01-23

申请号：US11165417

申请日：2005-06-23

申请人： Tesshi Iwakura ,  Shinichi Deguchi

发明人： Tesshi Iwakura ,  Shinichi Deguchi

IPC分类号： H02M7/04

CPC分类号： H02M3/158 ,  Y02B70/1425

摘要： A series circuit of a first main transistor 4 and a first main diode 6 is connected across a DC input voltage source 1, and a filter capacitor 13 and a series circuit of a second main diode 12 and a second main transistor 8 are connected in parallel with the output load side. A filter reactor 7 is connected between the juncture of the first main transistor 4 and the first main diode 6 in the series circuit and the juncture between the second main diode 12 and the second main transistor 8 in the series circuit. Resonant capacitors 5 and 9 in effect are connected across the collector-emitter path of the first and second main transistors 4 and 8, respectively. In operations other than that with small load current, when the first and second main transistors 4 and 8 are turned off, the collector currents therefrom are caused to flow to the resonant capacitors 5 and 9, respectively, thus obtaining soft switching. In the small load operation with a pulse width less than that in the neighborhood of the resonant time, instead of the on-off operation of the first or second main transistor, hard switching is made with a first auxiliary transistor 2 at the step-down time and with a second auxiliary transistor 11 at the step-down time.

摘要翻译： 第一主晶体管4和第一主二极管6的串联电路跨越DC输入电压源1连接，滤波电容器13和第二主二极管12和第二主晶体管8的串联电路并联 具有输出负载侧。 滤波电抗器7连接在串联电路中的第一主晶体管4和第一主二极管6的接合点与串联电路中的第二主二极管12与第二主晶体管8之间的接合点处。 谐振电容器5和9实际上分别连接在第一和第二主晶体管4和8的集电极 - 发射极路径之间。 在小负载电流以外的操作中，当第一和第二主晶体管4和8断开时，其集电极电流分别流到谐振电容器5和9，从而获得软开关。 在脉冲宽度小于谐振时间附近的小负载操作中，代替第一或第二主晶体管的导通截止操作，在第一辅助晶体管2的降压状态下进行硬切换 在第二辅助晶体管11处于降压时间。

公开(公告)号：US20060018138A1

公开(公告)日：2006-01-26

申请号：US11165417

申请日：2005-06-23

申请人： Tesshi Iwakura ,  Shinichi Deguchi

发明人： Tesshi Iwakura ,  Shinichi Deguchi

IPC分类号： H02M7/04

CPC分类号： H02M3/158 ,  Y02B70/1425

摘要： A series circuit of a first main transistor 4 and a first main diode 6 is connected across a DC input voltage source 1, and a filter capacitor 13 and a series circuit of a second main diode 12 and a second main transistor 8 are connected in parallel with the output load side. A filter reactor 7 is connected between the juncture of the first main transistor 4 and the first main diode 6 in the series circuit and the juncture between the second main diode 12 and the second main transistor 8 in the series circuit. Resonant capacitors 5 and 9 in effect are connected across the collector-emitter path of the first and second main transistors 4 and 8, respectively. In operations other than that with small load current, when the first and second main transistors 4 and 8 are turned off, the collector currents therefrom are caused to flow to the resonant capacitors 5 and 9, respectively, thus obtaining soft switching. In the small load operation with a pulse width less than that in the neighborhood of the resonant time, instead of the on-off operation of the first or second main transistor, hard switching is made with a first auxiliary transistor 2 at the step-down time and with a second auxiliary transistor 11 at the step-down time.

摘要翻译： 第一主晶体管4和第一主二极管6的串联电路跨越直流输入电压源1连接，滤波电容器13和第二主二极管12和第二主晶体管8的串联电路并联 具有输出负载侧。 滤波电抗器7连接在串联电路中的第一主晶体管4和第一主二极管6的接合点与串联电路中的第二主二极管12与第二主晶体管8之间的接合点处。 谐振电容器5和9实际上分别连接在第一和第二主晶体管4和8的集电极 - 发射极路径之间。 在小负载电流以外的操作中，当第一和第二主晶体管4和8断开时，其集电极电流分别流到谐振电容器5和9，从而获得软开关。 在脉冲宽度小于谐振时间附近的小负载操作中，代替第一或第二主晶体管的导通截止操作，在第一辅助晶体管2的降压下进行硬切换 在第二辅助晶体管11处于降压时间。