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    • 1. 发明授权
    • Low-switching loss DC-DC converter
    • 低开关损耗DC-DC转换器
    • US4991075A
    • 1991-02-05
    • US475979
    • 1990-02-06
    • Akira SaitouOsamu TakahashiSeigou TsukadaYasuyuki SoharaHideki TsuruseHidehiko Sugimoto
    • Akira SaitouOsamu TakahashiSeigou TsukadaYasuyuki SoharaHideki TsuruseHidehiko Sugimoto
    • H02M3/335
    • H02M3/33538
    • A DC-DC converter comprises a switching element having a rise time t.sub.on and a fall time t.sub.off ; a control device for controlling the switching operation of the switching element; a transformer having a primary winding and a secondary winding, the primary winding being connected to a DC power source through the switching element, and having an open inductance L.sub.M ; an inductance coil having an inductance L connected to the secondary winding of the transformer; and a rectifying device for rectifying the output from the secondary winding of the transformer; assuming that the voltage applied to the primary winding of the transformer is E, the load current flowing through the transformer is I.sub.D, and the sum of the stray capacitance of the switching element and the distributed capacity of the windings of the transformer is C1, the following relational expressions being established:L>(E/I.sub.D)T.sub.onandL.sub.M >t.sub.off.sup.2 /.pi..sup.2 Cl
    • DC-DC转换器包括具有上升时间吨和下降时间toff的开关元件; 控制装置,用于控制开关元件的开关动作; 具有初级绕组和次级绕组的变压器,所述初级绕组通过所述开关元件连接到DC电源,并且具有开路电感LM; 具有与变压器的次级绕组连接的电感L的电感线圈; 以及整流装置,用于对变压器的次级绕组的输出进行整流; 假设施加到变压器的初级绕组的电压为E,流过变压器的负载电流为ID,开关元件的杂散电容和变压器绕组的分布电容之和为C1, 建立以下关系式:L>(E / ID)Ton和LM> toff2 / pi 2Cl