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    • 10. 发明申请
    • TWO TERMINALS QUASI RESONANT TANK CIRCUIT
    • 两个端子QUASI RESONAN坦克电路
    • US20100061123A1
    • 2010-03-11
    • US12620003
    • 2009-11-17
    • Arian JansenMark TelefusBahman Sharifipour
    • Arian JansenMark TelefusBahman Sharifipour
    • H02M3/335
    • H02M3/33507H02M3/33523H02M3/33569Y02B70/1433
    • A power converter includes a transformer, a primary switch, an auxiliary switch, first and second resonance capacitors, and a secondary side rectification means. A switch mode power supply is formed to use reflected voltage and parasitic capacitance as an energy source for a transformer resonance. The auxiliary switch effectively exchanges energy between the primary inductance of the transformer and the first and second resonant capacitors. The auxiliary switch effectively switches the transformer resonance between two distinct frequencies. In one embodiment of the invention, the power converter can be, but is not limited to, a flyback converter and further includes a comparator and a driver. The comparator is for detecting the voltage across the second resonance capacitor and the driver is configured to drive the auxiliary switch based on the output state of the comparator. The resonant nature of the converter provides zero voltage (ZVS) for the primary switch as well as for the auxiliary switch.
    • 功率转换器包括变压器,初级开关,辅助开关,第一和第二谐振电容器以及次级侧整流装置。 形成开关模式电源,以使用反射电压和寄生电容作为变压器谐振的能量源。 辅助开关有效地在变压器的初级电感和第一和第二谐振电容器之间交换能量。 辅助开关有效地切换两个不同频率之间的变压器谐振。 在本发明的一个实施例中,功率转换器可以是但不限于反激转换器,还包括比较器和驱动器。 比较器用于检测第二谐振电容器两端的电压,并且驱动器被配置为基于比较器的输出状态来驱动辅助开关。 转换器的谐振特性为主开关以及辅助开关提供零电压(ZVS)。