Diving mask
    6.
    外观设计

    公开(公告)号:USD873991S1

    公开(公告)日:2020-01-28

    申请号:US29662479

    申请日:2018-09-05

    申请人: Yan Chen

    设计人: Yan Chen

    Power factor correction circuit
    10.
    发明授权
    Power factor correction circuit 有权
    功率因数校正电路

    公开(公告)号:US09001537B2

    公开(公告)日:2015-04-07

    申请号:US13523615

    申请日:2012-06-14

    摘要: A power factor correction (PFC) circuit includes an AC power, a first bridge arm and a second bridge arm. The first bridge arm includes first and second switches connected in series with each other. A second terminal of the first switch is connected to a first terminal of the second switch, and coupled to a first end of the AC power via a first inductor. The second bridge arm includes third and fourth switches connected in series with each other. A second terminal of the third switch is connected to a first terminal of the fourth switch and a second end of the AC power. The third and fourth switches operate in ON/OFF states by use of a control signal having an operation frequency consistent with that of the AC power. The on-state resistance of the third and fourth switches is lower than that of the first or second switch.

    摘要翻译: 功率因数校正(PFC)电路包括AC电力,第一桥臂和第二桥臂。 第一桥臂包括彼此串联连接的第一和第二开关。 第一开关的第二端子连接到第二开关的第一端子,并且经由第一电感器耦合到AC电力的第一端。 第二桥臂包括彼此串联连接的第三和第四开关。 第三开关的第二端子连接到第四开关的第一端子和交流电源的第二端。 第三和第四开关通过使用具有与AC电力的操作频率一致的操作频率的控制信号来操作ON / OFF状态。 第三和第四开关的导通电阻低于第一或第二开关的导通电阻。