Semiconductor devices and methods of making same
    12.
    发明授权
    Semiconductor devices and methods of making same 有权
    半导体器件及其制造方法

    公开(公告)号:US07391058B2

    公开(公告)日:2008-06-24

    申请号:US11168174

    申请日:2005-06-27

    IPC分类号: H01L29/15 H01L31/0312

    摘要: A composite structure having a silicon carbide epitaxial layer is provided. The epitaxial layer includes at least four regions arranged vertically and defining respective interfaces, where each of the regions is characterized by a respective impurity concentration, where the impurity concentrations vary across each of the interfaces, and where each of the impurity concentrations exceeds 1×1017 cm−3 for at least one single impurity in all of the regions.

    摘要翻译: 提供了具有碳化硅外延层的复合结构。 外延层包括至少四个垂直排列的区域并限定相应的界面,其中每个区域由相应的杂质浓度表征,其中杂质浓度在每个界面上变化,并且其中每个杂质浓度超过1×10 9 对于所有区域中的至少一种单一杂质,对于> 17 ±3

    Semiconductor devices and methods of making same
    13.
    发明申请
    Semiconductor devices and methods of making same 有权
    半导体器件及其制造方法

    公开(公告)号:US20060289873A1

    公开(公告)日:2006-12-28

    申请号:US11168174

    申请日:2005-06-27

    IPC分类号: H01L31/0312 H01L21/00

    摘要: A composite structure having a silicon carbide epitaxial layer is provided. The epitaxial layer includes at least four regions arranged vertically and defining respective interfaces, where each of the regions is characterized by a respective impurity concentration, where the impurity concentrations vary across each of the interfaces, and where each of the impurity concentrations exceeds 1×107 cm−3 for at least one single impurity in all of the regions.

    摘要翻译: 提供了具有碳化硅外延层的复合结构。 外延层包括至少四个垂直排列的区域并限定相应的界面,其中每个区域由相应的杂质浓度表征,其中杂质浓度在每个界面上变化,并且其中每个杂质浓度超过1×10 9 对于所有区域中的至少一种单一杂质,> 7 -3±3

    Apparatus and method for representing protection device trip response
    14.
    发明授权
    Apparatus and method for representing protection device trip response 有权
    用于表示保护装置跳闸响应的装置和方法

    公开(公告)号:US06535370B1

    公开(公告)日:2003-03-18

    申请号:US09650528

    申请日:2000-08-30

    IPC分类号: H01H7300

    CPC分类号: H02H3/0935 H02H3/04 H02H7/30

    摘要: A method and apparatus generates an enhanced trip time curve capable of capturing both the non-sinusoidal energy and series effects. Relevant data including time, current, and energy is plotted on a three-dimensional set of axes. The resultant three-dimensional representation is useful for representing trip times for a protection device accounting for energy effects, and for determining selectivity in a multi-tier electrical distribution system.

    摘要翻译: 一种方法和装置产生能够捕获非正弦能量和串联效应的增强跳闸时间曲线。 包括时间,当前和能量在内的相关数据绘制在三维轴组上。 所得到的三维表示对于表示能量效应的保护装置的跳闸时间以及用于在多层配电系统中确定选择性是有用的。

    SYSTEM AND METHOD FOR LIMITING PHOTOVOLTAIC STRING VOLTAGE
    17.
    发明申请
    SYSTEM AND METHOD FOR LIMITING PHOTOVOLTAIC STRING VOLTAGE 审中-公开
    限制光伏电压的系统和方法

    公开(公告)号:US20130076144A1

    公开(公告)日:2013-03-28

    申请号:US13246934

    申请日:2011-09-28

    IPC分类号: H02J1/00

    摘要: A system and method are provided for enabling a PV inverter to be connected to a string of series connected PV modules without exposing the inverter to elevated voltage stresses. The input voltage to the inverter is gradually built up by sequentially switching in more series PV modules. This system and method are simple to implement in both centralized and distributed PV power plants and in either case, it significantly increases the utilization of the PV inverter. The input switching elements can be implemented using a wide variety of parts including electro-mechanical switches, semiconductor switches (IGBTs, MOSFETs . . . , etc.) as well as MEMS devices depending on the current level and target cost. A mix of switches can also be used to assist in minimizing impedance of the final switching stage that remains connected during normal operation.

    摘要翻译: 提供了一种系统和方法,用于使PV逆变器能够连接到一串串联的PV模块,而不会使逆变器暴露于升高的电压应力。 逆变器的输入电压通过依次切换更多串联的光伏组件逐渐建立起来。 这种系统和方法在集中和分布式光伏发电厂都很容易实现,在任何一种情况下,它显着提高了光伏逆变器的利用率。 输入开关元件可以使用包括机电开关,半导体开关(IGBT,MOSFET等)的各种部件以及取决于当前水平和目标成本的MEMS器件来实现。 还可以使用混合开关来最小化在正常操作期间保持连接的最终开关级的阻抗。

    DC to DC power converters and methods of controlling the same
    18.
    发明授权
    DC to DC power converters and methods of controlling the same 有权
    直流到直流电源转换器及其控制方法

    公开(公告)号:US08330299B2

    公开(公告)日:2012-12-11

    申请号:US13171683

    申请日:2011-06-29

    IPC分类号: H01H9/54

    摘要: A power generation system configured to provide direct current (DC) power to a DC link is described. The system includes a first power generation unit configured to output DC power. The system also includes a first DC to DC converter comprising an input section and an output section. The output section of the first DC to DC converter is coupled in series with the first power generation unit. The first DC to DC converter is configured to process a first portion of the DC power output by the first power generation unit and to provide an unprocessed second portion of the DC power output of the first power generation unit to the output section.

    摘要翻译: 描述了被配置为向DC链路提供直流(DC)电力的发电系统。 该系统包括被配置为输出直流电力的第一发电单元。 该系统还包括第一DC-DC转换器,其包括输入部分和输出部分。 第一DC-DC转换器的输出部分与第一发电单元串联耦合。 第一DC-DC转换器被配置为处理由第一发电单元输出的直流电力的第一部分,并且向输出部提供第一发电单元的直流电力输出的未处理的第二部分。