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    Multi-functional direct current ice melting automatic switching circuit and switching method thereof
    2.
    发明授权
    Multi-functional direct current ice melting automatic switching circuit and switching method thereof 有权

    公开(公告)号：US09972988B2

    公开(公告)日：2018-05-15

    申请号：US14357169

    申请日：2012-05-21

    申请人： Chuang Fu ,  Hong Rao ,  Shukai Xu ,  Xiaolin Li

    发明人： Chuang Fu ,  Hong Rao ,  Shukai Xu ,  Xiaolin Li

    IPC分类号： H02G7/16 ,  H02J3/02

    CPC分类号： H02G7/16 ,  H02J3/02 ,  Y10T307/747

    摘要： A multi-functional automatic switching circuit for direct current ice melting and a switching method thereof are provided. The automatic switching circuit comprises at least one sub-switching circuit. The sub-switching circuit comprises a six-pulse current converter (R) with no saturable reactor, six reactors (L1a, L1b, L1c, L2a, L2b, and L2c), three three-phase knife switches (Sac1, Sac2, and Sac3), and five single-phase knife switches (SV1, SV2, SV3, SV4, and SV5). The sub-switching circuits in series connection or parallel connection, four direct current side switching knife switches (Sdc1, Sdc2, Sdc3, and Sdc4), an isolation knife switch (K), a breaker (QF) and a control and protection system (CP) may form an automatic switching circuit for six-pulse or twelve-pulse direct current ice melting. The automatic switching circuit with no saturable reactor reduces noise during operation, achieves mutually automatic switching among modes of reactor switching, ice melting and test, and may complete the through-flow test of the automatic switching circuit without switching in a power transmission line, thereby solving the problem of daily operation and maintenance.

    Bias circuit for a high power radio frequency switching device
    5.
    发明授权
    Bias circuit for a high power radio frequency switching device 有权

    公开(公告)号：US09768770B2

    公开(公告)日：2017-09-19

    申请号：US14196987

    申请日：2014-03-04

    申请人： TriQuint Semiconductor, Inc.

    发明人： Charles F. Campbell

    IPC分类号： H03K17/00 ,  H03K17/687 ,  H03K17/16

    CPC分类号： H03K17/687 ,  H03K17/161 ,  H03K2217/0054 ,  Y10T307/747 ,  Y10T307/937

    摘要： Embodiments provide a switching circuit including a transistor and a bias circuit. The transistor may transition between an off state and an on state responsive to a control signal received at a control terminal. The bias circuit may be coupled between the control terminal and a gate terminal of the transistor. The bias circuit may include a gate resistor coupled between the gate terminal and the control terminal. The bias circuit may further include one or more diodes coupled in parallel with the gate resistor between the gate terminal and the control terminal to allow leakage current to pass from the gate terminal through the one or more diodes. In some embodiments, the bias circuit may include a switch coupled with the one or more diodes to selectively couple the one or more diodes in parallel with the gate resistor when the transistor is off.

    Selectivity module with serial status signal
    6.
    发明授权
    Selectivity module with serial status signal 有权

    公开(公告)号：US09722409B2

    公开(公告)日：2017-08-01

    申请号：US14361935

    申请日：2011-12-01

    申请人： Heiko Janisch

    发明人： Heiko Janisch

    IPC分类号： H02H3/02 ,  H01H9/16 ,  H02H1/00 ,  H02J13/00 ,  H02H3/087

    CPC分类号： H02H3/02 ,  H01H9/167 ,  H02H1/0061 ,  H02H3/087 ,  H02J13/0003 ,  Y02B90/228 ,  Y04S20/18 ,  Y10T307/747

    摘要： A selectivity module for dividing a load current in an installation system includes a housing, a plurality of branches in the housing, a plurality of switching devices, and a control unit. Each of the plurality of switching devices is configured for switching a branch current on and off in a corresponding one of the plurality of branches. The plurality of switching devices serves to output information about corresponding switching states. The control unit is connected to the plurality of switching devices and configured to output a status signal as a function of the output information from the plurality of switching devices. The output information relating to the individual switching states of all of the plurality of switching devices is contained in the status signal in a serial encoded form.

    Circuit for providing dummy load
    10.
    发明授权
    Circuit for providing dummy load 有权
    提供虚拟负载的电路

    公开(公告)号：US09503071B2

    公开(公告)日：2016-11-22

    申请号：US13861410

    申请日：2013-04-12

    申请人： HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD. ,  HON HAI PRECISION INDUSTRY CO., LTD.

    发明人： Yuan-Xi Chen ,  Ying-Bin Fu ,  Ya-Jun Pan

    IPC分类号： H03K17/00 ,  H03K17/22

    CPC分类号： H03K17/00 ,  H03K17/223 ,  Y10T307/747

    摘要： A circuit for providing a dummy load includes first to fifth resistors, a comparator, and first to fifth electronic switches. When a power good signal from a power supply is at a low level signal, the first electronic switch is turned off. The second to fourth electronic switches are turned on. The fifth electronic switch is turned off. When the power good signal from the power supply is at a high level signal, the first electronic switch is turned on. The second to fourth electronic switches are turned off. The fifth electronic switch is turned off.

    摘要翻译： 用于提供虚拟负载的电路包括第一至第五电阻器，比较器和第一至第五电子开关。 当来自电源的电力良好信号处于低电平信号时，第一电子开关被断开。 第二至第四电子开关导通。 第五个电子开关关闭。 当来自电源的电源良好信号处于高电平信号时，第一电子开关接通。 第二个到第四个电子开关被关闭。 第五个电子开关关闭。