Electrical switching device
    2.
    发明申请
    Electrical switching device 有权
    电气开关装置

    公开(公告)号:US20070152730A1

    公开(公告)日:2007-07-05

    申请号:US11325581

    申请日:2006-01-04

    IPC分类号: H03K17/00

    CPC分类号: H03K17/127 H03K17/567

    摘要: An electrical switching device having a plurality of parallel coupled IGBTs is provided. The electrical switching device balances electrical currents in each of the IGBTs that are supplied to a load.

    摘要翻译: 提供具有多个并联耦合IGBT的电开关器件。 电气开关装置平衡供应给负载的每个IGBT中的电流。

    Methods and apparatus for coupling an energy storage system to a variable energy supply system
    3.
    发明申请
    Methods and apparatus for coupling an energy storage system to a variable energy supply system 有权
    将能量存储系统耦合到可变能量供应系统的方法和装置

    公开(公告)号:US20070080666A1

    公开(公告)日:2007-04-12

    申请号:US11247836

    申请日:2005-10-10

    IPC分类号: H02J7/00

    摘要: A method for coupling an energy storage system to a variable energy supply system includes providing an energy storage system including at least one Vanadium redox battery and at least one battery charge controller. The method also includes electrically coupling the at least one battery charge controller to the variable energy supply system such that the at least one battery is configured to supply a substantially consistent energy output during fluctuating energy loads of the energy supply system.

    摘要翻译: 将能量存储系统耦合到可变能量供应系统的方法包括提供包括至少一个钒氧化还原电池和至少一个电池充电控制器的能量存储系统。 该方法还包括将至少一个电池充电控制器电耦合到可变能量供应系统,使得至少一个电池被配置为在能量供应系统的波动能量负载期间提供基本一致的能量输出。

    Rock drill bit with back-reaming protection
    4.
    发明授权
    Rock drill bit with back-reaming protection 失效
    岩石钻头采用背面扩孔保护

    公开(公告)号:US6116357A

    公开(公告)日:2000-09-12

    申请号:US925700

    申请日:1997-09-09

    摘要: A drill bit for boring a bore hole in an earthen formation comprises: a bit body having a pin end, a cutting end and a longitudinal bit axis and including at least two legs extending from the cutting end, each of the legs including a bearing that rotatably supports a cutter cone. The bit body further includes a fluid flow system, including a flowway in said pin end that is in fluid communication with at least one exit port in the cutting end, the exit port being defined by a nozzle boss and disposed adjacent one of the legs. Each of the legs includes a leading side surface, a trailing side surface, and a center panel, and at least one of said legs is asymmetric such that its trailing side surface is larger than its leading side surface. The present bit can also include a lubricant system that has its opening in the trailing side of the leg, and can further include various wear resistant coatings and inserts on its surface.

    摘要翻译: 一种用于在土层中钻孔的钻头包括:具有销端,切割端和纵向钻头轴线并且包括从切割端延伸的至少两个腿的钻头体,每个腿包括轴承,所述轴承包括: 可旋转地支撑切割锥。 钻头体还包括流体流动系统,该流体流动系统包括在所述销端中的与所述切割端中的至少一个出口端口流体连通的流道,所述出口由喷嘴凸台限定并且邻近所述支腿设置。 每个腿包括前侧表面,后侧表面和中心面板,并且所述腿中的至少一个是不对称的,使得其后侧表面大于其前侧表面。 现在的位还可以包括在腿的后侧具有开口的润滑剂系统,并且还可以在其表面上包括各种耐磨涂层和插入物。

    Methods and systems for improved current sharing between parallel power semiconductors in power converters
    5.
    发明申请
    Methods and systems for improved current sharing between parallel power semiconductors in power converters 有权
    用于改善电力转换器中并联功率半导体之间电流共享的方法和系统

    公开(公告)号:US20060131668A1

    公开(公告)日:2006-06-22

    申请号:US11017447

    申请日:2004-12-20

    申请人: Robert Wagoner

    发明人: Robert Wagoner

    IPC分类号: H01L29/76

    摘要: Methods and systems for current sharing between power semiconductors in an assembly are provided. The power semiconductor assembly includes a plurality of power semiconductors, each comprising at least one output conductor, the plurality of output conductors are electrically coupled together in parallel, an output bus network configured to transpose the output conductors such that magnetic fields causing a current output imbalance between the plurality of power semiconductors are substantially canceled.

    摘要翻译: 提供了组件中功率半导体之间电流共享的方法和系统。 功率半导体组件包括多个功率半导体,每个功率半导体包括至少一个输出导体,多个输出导体并联电耦合在一起,输出总线网络被配置为转置输出导体,使得导致电流输出不平衡的磁场 在多个功率半导体之间基本上被取消。

    Thrust disc bearings for rotary cone air bits
    6.
    发明授权
    Thrust disc bearings for rotary cone air bits 失效
    用于旋转锥形空气钻头的推力圆盘轴承

    公开(公告)号:US5868502A

    公开(公告)日:1999-02-09

    申请号:US835285

    申请日:1997-04-09

    摘要: A first embodiment of a radially disposed thrust bearing assembly for rotary cone rock bits consists of a first non-rotating radially disposed steel thrust bearing disc and an adjacent, carbide thrust bearing disc. One of the thrust bearing discs is pressed into a disc retention socket formed in the end of a spindle bearing extending from the end of a main axially aligned bearing cantilevered from a leg of the bit and the other thrust bearing disc is pressed into a disc retention socket formed in the rotary cone. An edge of the carbide disc is formed with large valleys and peaks, the robust undulations resist cracking when the carbide thrust bearing disc is pressed into its respective socket. Unique air passages and channels are formed in the main and spindle bearings to direct cooling air to the thrust bearing discs. A second embodiment of a radially disposed thrust bearing assembly for rotary cone rock bits consists of a pair of preferably carbide thrust buttons, each of which has a central bore and a plurality of channels on its back face. The channels and central bore communicate with an air passage through the bit so as to provide a flow of cooling fluid such as air to the back of each thrust button. The invention further includes thrust bearing systems in which both of the thrust buttons comprise hard metal or sintered material.

    摘要翻译: 用于旋转锥形岩石钻头的径向设置的推力轴承组件的第一实施例由第一非旋转径向设置的钢推力轴承盘和相邻的碳化物推力轴承盘组成。 推力轴承盘中的一个被压入形成在主轴轴承端部的盘保持插座中,该主轴轴承从从该钻头的支脚悬臂的主轴向对准的轴承的端部延伸,另一个推力轴承盘被压入盘保持 插座形成在旋转锥体中。 碳化物圆盘的边缘形成有大的谷和峰,当碳化物推力轴承盘被压入其相应的插座时,坚固的波纹可以防止裂纹。 在主轴和主轴轴承中形成独特的空气通道和通道,以将冷却空气引导到推力轴承盘。 用于旋转锥形岩石钻头的径向设置的推力轴承组件的第二实施例由一对优选的碳化物推力按钮组成,每个都具有中心孔和在其背面上的多个通道。 通道和中心孔与通过该钻头的空气通道连通,以便向每个推力按钮的后部提供诸如空气的冷却流体流。 本发明还包括推力轴承系统,其中两个推力按钮都包括硬质金属或烧结材料。

    Thrust plugs for rotary cone air bits
    8.
    发明授权
    Thrust plugs for rotary cone air bits 失效
    用于旋转锥形空气钻头的推力塞

    公开(公告)号:US5642942A

    公开(公告)日:1997-07-01

    申请号:US622646

    申请日:1996-03-26

    申请人: Robert Wagoner

    发明人: Robert Wagoner

    摘要: A radially disposed thrust bearing assembly for air cooled and lubricated mining type rotary cone rock bits consists of a first non-rotating radially disposed steel thrust bearing disc and an apposed, non-rotating carbide thrust bearing disc. One of the thrust bearing discs is pressed into a disc retention socket formed in the end of a spindle bearing extending from the end of a main axially aligned bearing cantilevered from a leg of the bit and the other thrust bearing disc is pressed into a disc retention socket formed in the rotary cone. An edge of the carbide disc is formed with large valleys and peaks, the robust undulations resist cracking when the carbide thrust bearing disc is pressed into its respective socket. Unique air passages and channels are formed in the main and spindle bearings to direct cooling air to the apposed thrust bearing discs.

    摘要翻译: 用于空气冷却和润滑的采矿型旋转锥形岩石钻头的径向设置的推力轴承组件包括第一非旋转径向设置的钢推力轴承盘和安装的非旋转碳化物推力轴承盘。 推力轴承盘中的一个被压入形成在主轴轴承端部的盘保持插座中,该主轴轴承从从该钻头的支脚悬臂的主轴向对准的轴承的端部延伸,另一个推力轴承盘被压入盘保持 插座形成在旋转锥体中。 碳化物圆盘的边缘形成有大的谷和峰,当碳化物推力轴承盘被压入其相应的插座时,坚固的波纹可以防止裂纹。 在主轴承和主轴轴承中形成独特的空气通道和通道,以将冷却空气引导到附带的止推轴承盘。