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    APPARATUS AND METHOD FOR PROTECTING A MAGNETIC RESONANCE IMAGING MAGNET DURING QUENCH
    4.
    发明申请
    APPARATUS AND METHOD FOR PROTECTING A MAGNETIC RESONANCE IMAGING MAGNET DURING QUENCH 有权
    在QU CH。。。。。。。。。。。。。。。。。。。。。。。

    公开(公告)号：US20120182012A1

    公开(公告)日：2012-07-19

    申请号：US13009407

    申请日：2011-01-19

    申请人： Yuri Lvovsky ,  Weijun Shen ,  Jian-She Wang

    发明人： Yuri Lvovsky ,  Weijun Shen ,  Jian-She Wang

    IPC分类号： G01R33/44 ,  H02H9/00 ,  H01F6/00

    CPC分类号： G01R33/3815 ,  H01F6/02 ,  H02H7/001 ,  Y02E40/68

    摘要： A superconducting magnet assembly comprising a plurality of superconducting magnet coil portions forming a coil series circuit to provide a magnetic field, a power supply to supply power to the plurality of superconducting magnet coil portions during a magnet ramp mode of operation, and a ramp switch coupled to the superconducting magnet coil portions, wherein the ramp switch is configured to be open during a magnet ramp mode and closed during a persistent mode. A dump resistor is disposed externally to the vessel and is connectable by the ramp switch to the superconducting magnet coil portions. Further, a controller is coupled to at least one superconducting magnet coil portion and the ramp switch and is configured to detect a quench onset condition in the at least one superconducting magnet coil portion and to open the ramp switch upon detection of the quench onset condition in order to dump magnet energy.

    摘要翻译： 一种超导磁体组件，包括形成线圈串联电路以提供磁场的多个超导磁体线圈部分，在磁体斜坡操作模式期间向多个超导磁体线圈部分供电的电源，以及耦合到 到所述超导磁体线圈部分，其中所述斜坡开关被配置为在磁体斜坡模式期间打开并在持久模式期间闭合。 放电电阻器设置在容器的外部，并且可由斜坡开关连接到超导磁体线圈部分。 此外，控制器耦合到至少一个超导磁体线圈部分和斜坡开关，并且被配置为检测至少一个超导磁体线圈部分中的骤冷起始状态，并且在检测到淬火开始条件时打开斜坡开关 为了倾倒磁铁能量。

    Apparatus and method for protecting a magnetic resonance imaging magnet during quench
    5.
    发明授权
    Apparatus and method for protecting a magnetic resonance imaging magnet during quench 有权
    在淬火期间保护磁共振成像磁体的装置和方法

    公开(公告)号：US08542015B2

    公开(公告)日：2013-09-24

    申请号：US13009407

    申请日：2011-01-19

    申请人： Yuri Lvovsky ,  Weijun Shen ,  Jian-She Wang

    发明人： Yuri Lvovsky ,  Weijun Shen ,  Jian-She Wang

    IPC分类号： G01V3/00

    CPC分类号： G01R33/3815 ,  H01F6/02 ,  H02H7/001 ,  Y02E40/68

    摘要： A superconducting magnet assembly comprising a plurality of superconducting magnet coil portions forming a coil series circuit to provide a magnetic field, a power supply to supply power to the plurality of superconducting magnet coil portions during a magnet ramp mode of operation, and a ramp switch coupled to the superconducting magnet coil portions, wherein the ramp switch is configured to be open during a magnet ramp mode and closed during a persistent mode. A dump resistor is disposed externally to the vessel and is connectable by the ramp switch to the superconducting magnet coil portions. Further, a controller is coupled to at least one superconducting magnet coil portion and the ramp switch and is configured to detect a quench onset condition in the at least one superconducting magnet coil portion and to open the ramp switch upon detection of the quench onset condition in order to dump magnet energy.

    摘要翻译： 一种超导磁体组件，包括形成线圈串联电路以提供磁场的多个超导磁体线圈部分，在磁体斜坡操作模式期间向多个超导磁体线圈部分供电的电源，以及耦合到 到所述超导磁体线圈部分，其中所述斜坡开关被配置为在磁体斜坡模式期间打开并在持久模式期间闭合。 放电电阻器设置在容器的外部，并且可由斜坡开关连接到超导磁体线圈部分。 此外，控制器耦合到至少一个超导磁体线圈部分和斜坡开关，并且被配置为检测至少一个超导磁体线圈部分中的骤冷起始状态，并且在检测到淬火开始条件时打开斜坡开关 为了倾倒磁铁能量。

    Systems and methods for passively shielding a magnetic field
    6.
    发明授权
    Systems and methods for passively shielding a magnetic field 有权
    被动屏蔽磁场的系统和方法

    公开(公告)号：US08514043B2

    公开(公告)日：2013-08-20

    申请号：US11225957

    申请日：2005-09-14

    申请人： Jian-She Wang ,  Jinhua Huang ,  Stephen R. Elgin

    发明人： Jian-She Wang ,  Jinhua Huang ,  Stephen R. Elgin

    IPC分类号： H01F7/00

    CPC分类号： G01R33/421 ,  H01F6/00 ,  H01F27/365

    摘要： A passive magnetic field shielding system for shielding a fringe magnetic field is described. The passive magnetic field shielding system includes a magnet configured to generate a uniform magnetic field, an imaging system with associated electronics coupled to the magnet, and a passive shield configured to reduce the strength of the fringing magnetic field to approximately five Gauss at a distance from the passive shield.

    摘要翻译： 描述了用于屏蔽边缘磁场的无源磁场屏蔽系统。 被动磁场屏蔽系统包括被配置为产生均匀磁场的磁体，具有耦合到磁体的相关电子器件的成像系统以及被配置为将边缘磁场的强度降低到距离 被动屏蔽。

    SINGLE SWITCH DUMP RESISTOR LADDER NETWORK FOR MAGNET QUENCH PROTECTION
    7.
    发明申请
    SINGLE SWITCH DUMP RESISTOR LADDER NETWORK FOR MAGNET QUENCH PROTECTION 有权
    单开关跳闸电阻器网络，用于磁芯保护

    公开(公告)号：US20130106545A1

    公开(公告)日：2013-05-02

    申请号：US13285603

    申请日：2011-10-31

    申请人： Jian-She Wang ,  Andrei G. Baikalov ,  Timothy John Bergfeld

    发明人： Jian-She Wang ,  Andrei G. Baikalov ,  Timothy John Bergfeld

    IPC分类号： H01F6/02

    CPC分类号： H01F6/02 ,  G01R33/3815

    摘要： A superconducting magnet assembly is provided that includes a magnet protection system electrically coupled to a plurality of magnet coils to form a closed loop circuit. The magnet protection system includes a single superconducting switch to selectively connect a power supply to the plurality of magnet coils and also includes a plurality of dump resistors arranged to form a resistor ladder circuit, with each of the plurality of dump resistors being connected between magnet coils forming a respective symmetric coil pair. The magnet protection system also includes a heater network connected between ends of the closed loop circuit and to the plurality of magnet coils, with the heater network configured to perform a quench-back operation to protect the plurality of magnet coils during quench and being driven by a partial-magnet coil voltage generated in a magnet coil upon initiation of a quench condition in the magnet coil.

    摘要翻译： 提供了一种超导磁体组件，其包括电耦合到多个磁体线圈以形成闭环电路的磁体保护系统。 磁体保护系统包括单个超导开关，用于选择性地将电源连接到多个磁体线圈，并且还包括多个倾倒电阻器，其布置成形成电阻梯形电路，多个转接电阻器中的每一个连接在磁体线圈之间 形成相应的对称线圈对。 磁体保护系统还包括连接在闭环电路的端部和多个磁体线圈之间的加热器网络，其中加热器网络被配置为执行淬火操作，以在淬火期间保护多个磁体线圈并被驱动 在磁体线圈中的骤冷条件开始时在磁体线圈中产生的部分磁体线圈电压。

    Single switch dump resistor ladder network for magnet quench protection
    8.
    发明授权
    Single switch dump resistor ladder network for magnet quench protection 有权
    单开关放电电阻梯形网络用于磁极淬火保护

    公开(公告)号：US08482369B2

    公开(公告)日：2013-07-09

    申请号：US13285603

    申请日：2011-10-31

    申请人： Jian-She Wang ,  Andrei G. Baikalov ,  Timothy John Bergfeld

    发明人： Jian-She Wang ,  Andrei G. Baikalov ,  Timothy John Bergfeld

    IPC分类号： H01F1/00 ,  H01F6/00

    CPC分类号： H01F6/02 ,  G01R33/3815

    摘要： A superconducting magnet assembly is provided that includes a magnet protection system electrically coupled to a plurality of magnet coils to form a closed loop circuit. The magnet protection system includes a single superconducting switch to selectively connect a power supply to the plurality of magnet coils and also includes a plurality of dump resistors arranged to form a resistor ladder circuit, with each of the plurality of dump resistors being connected between magnet coils forming a respective symmetric coil pair. The magnet protection system also includes a heater network connected between ends of the closed loop circuit and to the plurality of magnet coils, with the heater network configured to perform a quench-back operation to protect the plurality of magnet coils during quench and being driven by a partial-magnet coil voltage generated in a magnet coil upon initiation of a quench condition in the magnet coil.

    摘要翻译： 提供了一种超导磁体组件，其包括电耦合到多个磁体线圈以形成闭环电路的磁体保护系统。 磁体保护系统包括单个超导开关，用于选择性地将电源连接到多个磁体线圈，并且还包括多个倾倒电阻器，其布置成形成电阻梯形电路，多个转接电阻器中的每一个连接在磁体线圈之间 形成相应的对称线圈对。 磁体保护系统还包括连接在闭环电路的端部和多个磁体线圈之间的加热器网络，其中加热器网络被配置为执行淬火操作，以在淬火期间保护多个磁体线圈并被驱动 在磁体线圈中的骤冷条件开始时在磁体线圈中产生的部分磁体线圈电压。

    Systems and methods for passively shielding a magnetic field
    9.
    发明申请
    Systems and methods for passively shielding a magnetic field 有权
    被动屏蔽磁场的系统和方法

    公开(公告)号：US20070057754A1

    公开(公告)日：2007-03-15

    申请号：US11225957

    申请日：2005-09-14

    申请人： Jian-She Wang ,  Jinhua Huang ,  Stephen Elgin

    发明人： Jian-She Wang ,  Jinhua Huang ,  Stephen Elgin

    IPC分类号： H01F7/00

    CPC分类号： G01R33/421 ,  H01F6/00 ,  H01F27/365

    摘要： A passive magnetic field shielding system for shielding a fringe magnetic field is described. The passive magnetic field shielding system includes a magnet configured to generate a uniform magnetic field, an imaging system with associated electronics coupled to the magnet, and a passive shield configured to reduce the strength of the fringing magnetic field to approximately five Gauss at a distance from the passive shield.

    摘要翻译： 描述了用于屏蔽边缘磁场的无源磁场屏蔽系统。 被动磁场屏蔽系统包括被配置为产生均匀磁场的磁体，具有耦合到磁体的相关电子器件的成像系统以及被配置为将边缘磁场的强度降低到距离 被动屏蔽。