公开(公告)号：US20110280048A1

公开(公告)日：2011-11-17

申请号：US12680240

申请日：2009-02-25

申请人： Toshikazu Fujiyoshi ,  Hajime Katsushima ,  Kenji Morimoto ,  Satoshi Yamamura

发明人： Toshikazu Fujiyoshi ,  Hajime Katsushima ,  Kenji Morimoto ,  Satoshi Yamamura

IPC分类号： H02M3/335

CPC分类号： H02M3/33569 ,  H02M1/34 ,  H02M2001/342 ,  Y02B70/1491

摘要： This DC-DC converter circuit includes a switching circuit which switches a DC power supply with a primary side switching element, a transformer to a primary side winding whereof the output of the switching circuit is applied and which outputs a voltage which has been changed by a predetermined voltage change ratio to a secondary side winding, and secondary diodes for current adjustment connected to the secondary side winding of the transformer. Moreover, it includes a regeneration snubber circuit connected in parallel with the secondary diode circuit and including a series circuit of a discharge blocking diode and a snubber capacitor and a switching element for regeneration connected in parallel with the discharge blocking diode, a filter circuit connected between rectification outputs of the secondary diode circuit, and a control unit which turns the switching element for regeneration ON a predetermined time period after the timing of turning the primary side switching element OFF. The predetermined time period is set to approximately the time period during which the charge, accumulated in the snubber capacitor due to reverse recovery time when one of the secondary diodes has been turned OFF, discharges.

摘要翻译： 该DC-DC转换器电路包括：开关电路，其将具有初级侧开关元件的直流电源，变压器切换到施加开关电路的输出的初级侧绕组，并且输出由 与次级侧绕组的预定电压变化率以及连接到变压器的次级侧绕组的用于电流调节的次级二极管。 此外，它包括与次级二极管电路并联连接的再生缓冲电路，并且包括放电阻断二极管和缓冲电容器的串联电路以及用于与放电阻塞二极管并联连接的再生开关元件，滤波电路连接在 二次二极管电路的整流输出，以及在使一次侧开关元件断开的定时之后的预定时间段内转动用于再生的开关元件的控制单元。 预定时间周期被设定为近似于在二次二极管中的一个被截止时由于反向恢复时间而累积在缓冲电容器中的电荷放电的时间段。