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    Passive ripple filter for zero voltage-zero current switched full-bridge DC/DC converters
    1.
    发明授权
    Passive ripple filter for zero voltage-zero current switched full-bridge DC/DC converters 失效
    用于零电压零电流开关全桥DC / DC转换器的无源纹波滤波器

    公开(公告)号：US5886884A

    公开(公告)日：1999-03-23

    申请号：US958368

    申请日：1997-10-27

    申请人： Ju-Won Baek ,  Jung-Goo Cho ,  Geun-Hie Rim ,  Eun-Soo Kim

    发明人： Ju-Won Baek ,  Jung-Goo Cho ,  Geun-Hie Rim ,  Eun-Soo Kim

    IPC分类号： H02M3/335 ,  H02M1/14 ,  H02M3/337

    CPC分类号： H02M3/337 ,  H02M1/14

    摘要： The present invention is a circuit for zero voltage-zero current switching in a full-bridge DC-DC converter including a transformer for inducing the current and the voltage onto the secondary side by the switching operation of switches configured as full bridge; a full-bridge rectifier by which current of the secondary side flows in only one direction; a smoothing inductor and a capacitor as an output filter, the present circuit comprised of a capacitor and a discharge diode connected in series between the output of the full-bridge rectifier and a ground; a secondary winding of the smoothing inductor and a charge diode connected in series across the capacitor; and another capacitor connected in series with the charge diode. The present circuit configured in the above arrangement enables a full-bridge DC--DC converter to perform a switching operation at zero voltage and zero current without active elements or dissipative elements such as a saturation reactor, thereby achieving a reduction in cost in the manufacture of a converter. In addition, the present circuit reduces the ripples in the output current flowing through the inductor, and is consequently well suited for a DC--DC converter requiring high-frequency switching.

    摘要翻译： 本发明是一种全桥DC-DC转换器中的零电压零电流切换电路，包括用于通过配置为全桥的开关的开关操作来感应次级侧的电流和电压的变压器; 二次侧电流仅在一个方向流动的全桥整流器; 平滑电感器和电容器作为输出滤波器，该电路包括串联连接在全桥整流器的输出端和地之间的电容器和放电二极管; 平滑电感器的次级绕组和串联连接在电容器上的充电二极管; 以及与充电二极管串联连接的另一电容器。 以上述结构配置的本电路使得全桥DC-DC转换器能够在没有有源元件或诸如饱和电抗器的耗散元件的零电压和零电流下执行开关操作，从而实现制造中的成本降低 一个转换器。 此外，本电路减少流过电感器的输出电流中的波纹，因此非常适合于需要高频切换的DC-DC转换器。