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    Method and apparatus for actively controlling quench protection of a superconducting magnet
    3.
    发明授权
    Method and apparatus for actively controlling quench protection of a superconducting magnet 有权
    主动控制超导磁体淬火保护的方法和装置

    公开(公告)号：US07876100B2

    公开(公告)日：2011-01-25

    申请号：US12567846

    申请日：2009-09-28

    申请人： Xianrui Huang ,  Minfeng Xu

    发明人： Xianrui Huang ,  Minfeng Xu

    IPC分类号： G01V3/00

    CPC分类号： G01R33/3815 ,  G01R33/288 ,  H01F6/02

    摘要： A method and apparatus for actively controlling quench protection of a superconducting magnet includes a magnetic resonance imaging (MRI) system and a computer readable storage medium having stored thereon a computer program comprising instructions which when executed by a computer cause the computer to detect a quench condition of the superconducting magnet. The instructions also cause the computer to actively control a quench protection system of the superconducting magnet in response to the detected quench condition.

    摘要翻译： 用于主动控制超导磁体的淬火保护的方法和装置包括磁共振成像（MRI）系统和其上存储有计算机程序的计算机可读存储介质，所述计算机程序包括当计算机执行时使计算机检测淬火条件的指令 的超导磁体。 指令还使得计算机响应于检测到的淬火条件主动地控制超导磁体的淬火保护系统。

    Method and apparatus for passive shimming of magnets
    6.
    发明授权
    Method and apparatus for passive shimming of magnets 失效
    用于磁体被动调光的方法和装置

    公开(公告)号：US07196520B2

    公开(公告)日：2007-03-27

    申请号：US10904094

    申请日：2004-10-22

    申请人： Weijun Shen ,  Minfeng Xu ,  Bu-Xin Xu

    发明人： Weijun Shen ,  Minfeng Xu ,  Bu-Xin Xu

    IPC分类号： G01V3/00

    CPC分类号： G01R33/3873

    摘要： An apparatus and method for shimming a magnetic field of a magnet in a volume of interest includes a nonmagnetic holder configured with an array of fluid containing pockets; and a solidified ferromagnetic fluid in each pocket of the array of fluid containing pockets, wherein the solidified ferromagnetic fluid is fabricated from a ferromagnetic fluid, a diluting liquid, a hardener, and an accelerator agent. The ferromagnetic fluid includes a carrier liquid, ferromagnetic particles, and a surfactant.

    摘要翻译： 用于对感兴趣的体积中的磁体的磁场进​​行匀场的装置和方法包括：非磁性保持器，其配置有包含口袋的流体阵列; 以及在包含凹穴的流体阵列的每个凹槽中的固化铁磁流体，其中固化的铁磁流体由铁磁流体，稀释液体，固化剂和促进剂制成。 铁磁流体包括载液，铁磁颗粒和表面活性剂。

    Superconducting magnet correction coil adjustment mechanism
    8.
    发明授权
    Superconducting magnet correction coil adjustment mechanism 有权
    超导磁体校正线圈调整机构

    公开(公告)号：US6014069A

    公开(公告)日：2000-01-11

    申请号：US216618

    申请日：1998-12-18

    申请人： Timothy John Havens ,  Xianrui Huang ,  Minfeng Xu

    发明人： Timothy John Havens ,  Xianrui Huang ,  Minfeng Xu

    IPC分类号： G01R33/3875 ,  H01F1/00

    CPC分类号： G01R33/3875

    摘要： A correction coil current adjustment circuit for a superconducting magnet to selectively switch various coils in circuit with a power source to provide the desired superconducting current flow and magnetic field homogeneity for magnetic resonance imaging eliminating the need for some of the mechanical leads which extend from the exterior of the magnet to the interior of the cryogen vessel minimizing thermal leak paths and including simplified switching of the various main and correction magnet coils to provide the desired current flow. Inductive coupling from outside the magnet to induce correction coil current flow eliminates additional mechanical leads.

    摘要翻译： 一种用于超导磁体的校正线圈电流调节电路，用于选择性地用电源切换电路中的各种线圈，以提供期望的超导电流和用于磁共振成像的磁场均匀性，从而消除了从外部延伸的一些机械引线的需要 的磁体到冷冻剂容器的内部使热泄漏路径最小化，并且包括各种主和修正磁体线圈的简化切换以提供期望的电流。 来自磁体外部的感应耦合以引起校正线圈电流消除额外的机械引线。

    QUENCH PROTECTION CIRCUIT FOR SUPERCONDUCTING MAGNET COILS
    10.
    发明申请
    QUENCH PROTECTION CIRCUIT FOR SUPERCONDUCTING MAGNET COILS 有权
    用于超级磁铁线圈的淬火保护电路

    公开(公告)号：US20120071326A1

    公开(公告)日：2012-03-22

    申请号：US13237805

    申请日：2011-09-20

    申请人： Anbo WU ,  Minfeng XU ,  Xianrui HUANG

    发明人： Anbo WU ,  Minfeng XU ,  Xianrui HUANG

    IPC分类号： H01F6/06 ,  H01F6/04 ,  H01F6/02 ,  H02H7/00

    CPC分类号： H02H7/001 ,  H01F6/02 ,  H02H9/023 ,  Y02E40/68 ,  Y02E40/69

    摘要： A superconducting magnet includes at least one superconducting coil and a quench protection circuit electrically coupled to said at least one coil in parallel. The circuit includes at least one quench heater assembly thermally coupled to the at least one coil, and at least one superconducting current limiter electrically connected in series with the at least one quench heater assembly. The superconducting current limiter has a superconducting state with zero resistance, and a normal state with a normal resistance to decrease an electric current flowing through the quench heater assembly.

    摘要翻译： 超导磁体包括至少一个超导线圈和与所述至少一个线圈并联电耦合的骤冷保护电路。 该电路包括至少一个与该至少一个线圈耦合的骤冷加热器组件，以及至少一个与该至少一个骤冷加热器组件串联电连接的超导电流限制器。 超导限流器具有零电阻的超导状态和具有正常电阻的正常状态，以减少流过骤冷加热器组件的电流。