公开(公告)号：US5862043A

公开(公告)日：1999-01-19

申请号：US831203

申请日：1997-04-02

申请人： Myung Joong Youn ,  Gun Woo Moon ,  Jun Young Lee ,  Che Hong Ahn

发明人： Myung Joong Youn ,  Gun Woo Moon ,  Jun Young Lee ,  Che Hong Ahn

IPC分类号： H02M3/28 ,  H02M1/00 ,  H02M1/42 ,  H02M3/335

CPC分类号： H02M1/4258 ,  H02M3/33592 ,  Y02B70/126 ,  Y02B70/1475

摘要： A switch coupled active forward converter comprising an AC power supply circuit for supplying AC power, a filtering circuit connected to the AC power supply circuit, for filtering an output current from the AC power supply circuit, an up converter connected to the filtering circuit, for generating a saw tooth wave signal in response to an output voltage from the filtering circuit, the saw tooth wave signal having a peak value following an input voltage to the AC power supply circuit when a switch ON operation is performed, a clamping circuit connected in common to the up converter, AC power supply circuit and filtering circuit, for clamping an output voltage from the up converter to a desired level, a transformer having a primary coil connected to the up converter, and an output circuit connected to a secondary coil of the transformer.

摘要翻译： 一种开关耦合有源正激转换器，包括用于提供AC电力的AC电源电路，连接到AC电源电路的滤波电路，用于对来自AC电源电路的输出电流进行滤波;连接到滤波电路的上变频器，用于 响应于来自滤波电路的输出电压产生锯齿波信号，锯齿波信号在执行开关导通操作时具有跟随AC电源电路的输入电压的峰值，钳位电路被共同连接 至上变频器，交流电源电路和滤波电路，用于将来自上变频器的输出电压钳位到期望的电平，具有连接到上变频器的初级线圈的变压器以及连接到上转换器的次级线圈的输出电路 变压器。

公开(公告)号：US5701243A

公开(公告)日：1997-12-23

申请号：US571085

申请日：1995-12-12

申请人： Myung Joong Youn ,  Gun Woo Moon ,  Marn Go Kim

发明人： Myung Joong Youn ,  Gun Woo Moon ,  Marn Go Kim

IPC分类号： H02M7/00 ,  H02M1/00 ,  H02M1/42 ,  H02M7/04 ,  H02M7/538

CPC分类号： H02M1/4241 ,  Y02B70/126

摘要： A high-power factor series resonant rectifier circuit comprising a first rectifier for rectifying an AC input power, a push-pull switching circuit for changing a polarity in the output of the first rectifier in response to a resonant frequency, an isolation transformer for transforming the output of the push-pull switching circuit, an LC resonance tank for resonating the output of the isolation transformer, a second rectifier for rectifying the output of the LC resonant tank, and a boost chopper switch connected in parallel to the output of the second rectifier. The boost chopper switch performs a switching operation when a resonant current becomes zero, resulting in an increase in power density. The increase in power density results in a reduction in switching loss. Therefore, the rectifier circuit of the present invention is operable at a high frequency.

摘要翻译： 一种高功率因数串联谐振整流电路，包括用于整流交流输入功率的第一整流器，用于响应于谐振频率改变第一整流器的输出极性的推挽开关电路，用于转换 推挽开关电路的输出，用于谐振隔离变压器的输出的LC谐振箱，用于整流LC谐振回路的输出的第二整流器和并联连接到第二整流器的输出的升压斩波开关 。 当谐振电流变为零时，升压斩波开关执行开关操作，导致功率密度的增加。 功率密度的增加导致开关损耗的降低。 因此，本发明的整流电路可以高频工作。