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    • 17. 发明授权
    • Power factor correction circuit
    • 功率因数校正电路
    • US09001537B2
    • 2015-04-07
    • US13523615
    • 2012-06-14
    • Hong-Yuan JinYan ChenHong-Jian GanJian-Ping Ying
    • Hong-Yuan JinYan ChenHong-Jian GanJian-Ping Ying
    • H02H7/125H02M1/42H02M1/00H02M7/219
    • H02M1/4233H02M2001/0048H02M2007/2195Y02B70/126Y02B70/1408Y02B70/1491
    • 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.
    • 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。
    • 19. 发明授权
    • Restorative dental appliances
    • 修复牙科用具
    • US08758009B2
    • 2014-06-24
    • US12055010
    • 2008-03-25
    • Yan ChenChunhua Li
    • Yan ChenChunhua Li
    • A61C3/00
    • A61C7/08A61C2201/007
    • A dental appliance including a concave trough conforming to a plurality of teeth when placed over the plurality of teeth. The concave trough is configured to transition from a first shape to a second shape if a deforming force is applied. The concave trough further includes a shape memory material. The shape memory material is configured to restore the concave trough to an approximate first shape upon an application of an external stimulus. The first shape is configured to apply a first force on a tooth when the trough conforms.
    • 一种牙科器具,当放置在所述多个牙齿上时,包括符合多个牙齿的凹槽。 如果施加变形力,凹槽被构造成从第一形状转变到第二形状。 凹槽还包括形状记忆材料。 形状记忆材料配置成在施加外部刺激时将凹槽恢复到近似的第一形状。 第一形状构造成当槽符合时在牙齿上施加第一力。