公开(公告)号：US20090072939A1

公开(公告)日：2009-03-19

申请号：US12209652

申请日：2008-09-12

申请人： Weijun Shen ,  Fengshun Tan ,  Guanghui Shen ,  Yihe Hua ,  Ye Zhu

发明人： Weijun Shen ,  Fengshun Tan ,  Guanghui Shen ,  Yihe Hua ,  Ye Zhu

IPC分类号： H01F7/02

CPC分类号： G01R33/3806 ,  G01R33/383 ,  H01F7/0278

摘要： A magnet system having a pair of parallel plate-like permanent magnets in which magnetic poles of reversed polarities are opposed to each other with a space therebetween. The pair of permanent magnets includes main portions magnetized in the same direction as their thickness direction, and peripheral portions magnetized in a direction different from their thickness direction.

摘要翻译： 一种具有一对平行板状永磁体的磁体系统，其中具有相反极性的磁极彼此相对并具有间隔。 一对永磁体包括沿与厚度方向相同的方向磁化的主体部分，并且沿与厚度方向不同的方向磁化的周边部分。

公开(公告)号：US07639013B2

公开(公告)日：2009-12-29

申请号：US11777611

申请日：2007-07-13

申请人： Fengshun Tan ,  Weijun Shen ,  Yihe Hua ,  Liang Liu

发明人： Fengshun Tan ,  Weijun Shen ,  Yihe Hua ,  Liang Liu

IPC分类号： G01V3/00

CPC分类号： G01R33/383 ,  G01R33/3804 ,  G01R33/3806 ,  H01F7/0278

摘要： With a view toward implementing a thermal controlling method for making reversible a temperature characteristic of a magnetic field generator using permanent magnets small in Hcj, a magnetic field generator whose temperature characteristic is reversible, using permanent magnets small in Hcj, and an MRI apparatus provided with such a magnetic field generator, there is provided a method for controlling the temperature of a magnetic field generator having a pair of disc-shaped permanent magnets whose magnetic poles opposite in polarity to each other are opposed to each other with spacing defined therebetween, and a yoke that forms return passes for magnetic fluxes of the permanent magnets, comprising the steps of raising the temperature from room temperature to a temperature higher than the room temperature, maintaining the temperature higher than the room temperature, and lowering the temperature from the temperature higher than the room temperature to the room temperature, whereby the temperature characteristics of the permanent magnets are made reversible.

摘要翻译： 为了实现使用Hcj小的永磁体的磁场发生器的可逆温度特性的可变温度特性的方法，使用温度特性可逆的磁场发生器，使用Hcj小的永磁体和具有 这样的磁场发生器提供了一种用于控制具有一对圆盘形永磁体的磁场发生器的温度的方法，所述一对圆盘形永久磁铁的极性彼此相对的磁极彼此相对并具有间隔，并且 形成永磁体的磁通量的返回通道的磁轭，包括将温度从室温升高到高于室温的温度，保持温度高于室温的步骤，并将温度从高于 室温到室温，由此t 使永磁体的温度特性可逆。

公开(公告)号：US20080048656A1

公开(公告)日：2008-02-28

申请号：US11777611

申请日：2007-07-13

申请人： Fengshun Tan ,  Weijun Shen ,  Yihe Hua ,  Liang Liu

发明人： Fengshun Tan ,  Weijun Shen ,  Yihe Hua ,  Liang Liu

IPC分类号： G01R33/44 ,  F27D19/00 ,  H01F7/02

CPC分类号： G01R33/383 ,  G01R33/3804 ,  G01R33/3806 ,  H01F7/0278

摘要： With a view toward implementing a thermal controlling method for making reversible a temperature characteristic of a magnetic field generator using permanent magnets small in Hcj, a magnetic field generator whose temperature characteristic is reversible, using permanent magnets small in Hcj, and an MRI apparatus provided with such a magnetic field generator, there is provided a method for controlling the temperature of a magnetic field generator having a pair of disc-shaped permanent magnets whose magnetic poles opposite in polarity to each other are opposed to each other with spacing defined therebetween, and a yoke that forms return passes for magnetic fluxes of the permanent magnets, comprising the steps of raising the temperature from room temperature to a temperature higher than the room temperature, maintaining the temperature higher than the room temperature, and lowering the temperature from the temperature higher than the room temperature to the room temperature, whereby the temperature characteristics of the permanent magnets are made reversible.

摘要翻译： 为了实现使用Hcj小的永磁体的磁场发生器的可逆温度特性的可变温度特性的方法，使用温度特性可逆的磁场发生器，使用Hcj小的永磁体和具有 这样的磁场发生器提供了一种用于控制具有一对圆盘形永磁体的磁场发生器的温度的方法，所述一对圆盘形永久磁铁的极性彼此相对的磁极彼此相对并具有间隔，并且 形成永磁体的磁通量的返回通道的磁轭，包括将温度从室温升高到高于室温的温度，保持温度高于室温的步骤，并将温度从高于 室温到室温，由此t 使永磁体的温度特性可逆。

公开(公告)号：US07262678B2

公开(公告)日：2007-08-28

申请号：US11368926

申请日：2006-03-06

申请人： Fengshun Tan

发明人： Fengshun Tan

IPC分类号： H01F7/02

CPC分类号： G01R33/383 ,  G01R33/3806 ,  H01F7/0278

摘要： With a view to providing a magnet apparatus which can form a medium magnetic field with use of permanent magnets, the magnet apparatus having a pair of parallel disc-like permanent magnets with magnetic poles of mutually opposite polarities opposed to each other through a spacing, further comprises: two pairs of rings constituted by permanent magnets and provided respectively on pole faces of the pair of permanent magnets coaxially and doubly, the two pairs of rings each having a magnetizing direction inclined relative to a magnetizing direction of the pair of permanent magnets and having magnetic poles of mutually opposite polarities opposed to each other through a spacing; and two pairs of cylinders formed by a ferromagnetic material and partitioning the interiors of the pair of permanent magnets respectively coaxially and doubly.

摘要翻译： 为了提供一种能够使用永磁体形成中等磁场的磁铁装置，该磁铁装置具有一对平行的盘状永久磁铁，该磁铁装置具有相互极性彼此相反极性的磁极，间隔一定距离 包括：由永磁体构成的两对环，分别设置在一对永磁体的极面上同轴并且双重，两对环具有相对于一对永磁体的磁化方向倾斜的磁化方向，并且具有 相互相对极性的磁极通过间隔彼此相对; 以及由铁磁材料形成的两对气缸，并且分别同轴地和双重地分隔一对永磁体的内部。

公开(公告)号：US09041399B2

公开(公告)日：2015-05-26

申请号：US13593546

申请日：2012-08-24

申请人： Timothy James Hollis ,  Fengshun Tan

发明人： Timothy James Hollis ,  Fengshun Tan

IPC分类号： G01R33/341 ,  G01R33/385 ,  H01F6/06 ,  G01R33/421

CPC分类号： G01R33/385 ,  G01R33/3854 ,  G01R33/4215 ,  H01F6/06

摘要： A gradient coil is provided. The gradient coil comprises: a first layer comprised of a first plurality of turns of wires; and a second layer of coil comprised of a second plurality of turns of wires. Each turn of wire in the first and second plurality of turns of wires circles along the side walls of a cylindrical substrate and each turn of wire in the first and second plurality of turns of wires include a first portion wound along the inner side wall of the substrate and a second portion wound along the outer side wall of the substrate.

摘要翻译： 提供梯度线圈。 梯度线圈包括：第一层，由第一多圈线组成; 以及由第二多圈线组成的第二层线圈。 第一和第二多圈线中的线的每一圈都沿着圆柱形基板的侧壁圆周，并且第一和第二多圈线中的每根线都包括沿着第一和第二多个线的内侧壁缠绕的第一部分 衬底和沿衬底的外侧壁缠绕的第二部分。

公开(公告)号：US20060202788A1

公开(公告)日：2006-09-14

申请号：US11368926

申请日：2006-03-06

申请人： Fengshun Tan

发明人： Fengshun Tan

IPC分类号： H01F3/00

CPC分类号： G01R33/383 ,  G01R33/3806 ,  H01F7/0278

摘要： With a view to providing a magnet apparatus which can form a medium magnetic field with use of permanent magnets, the magnet apparatus having a pair of parallel disc-like permanent magnets with magnetic poles of mutually opposite polarities opposed to each other through a spacing, further comprises: two pairs of rings constituted by permanent magnets and provided respectively on pole faces of the pair of permanent magnets coaxially and doubly, the two pairs of rings each having a magnetizing direction inclined relative to a magnetizing direction of the pair of permanent magnets and having magnetic poles of mutually opposite polarities opposed to each other through a spacing; and two pairs of cylinders formed by a ferromagnetic material and partitioning the interiors of the pair of permanent magnets respectively coaxially and doubly.

摘要翻译： 为了提供一种能够使用永磁体形成中等磁场的磁铁装置，该磁铁装置具有一对平行的盘状永久磁铁，该磁铁装置具有相互极性彼此相反极性的磁极，间隔一定距离 包括：由永磁体构成的两对环，分别设置在一对永磁体的极面上同轴并且双重，两对环具有相对于一对永磁体的磁化方向倾斜的磁化方向，并且具有 相互相对极性的磁极通过间隔彼此相对; 以及由铁磁材料形成的两对气缸，并且分别同轴地和双重地分隔一对永磁体的内部。

公开(公告)号：US20130049755A1

公开(公告)日：2013-02-28

申请号：US13593546

申请日：2012-08-24

申请人： Timothy James HOLLIS ,  Fengshun Tan

发明人： Timothy James HOLLIS ,  Fengshun Tan

IPC分类号： G01R33/341

CPC分类号： G01R33/385 ,  G01R33/3854 ,  G01R33/4215 ,  H01F6/06

摘要： A gradient coil is provided. The gradient coil comprises: a first layer comprised of a first plurality of turns of wires; and a second layer of coil comprised of a second plurality of turns of wires. Each turn of wire in the first and second plurality of turns of wires circles along the side walls of a cylindrical substrate and each turn of wire in the first and second plurality of turns of wires include a first portion wound along the inner side wall of the substrate and a second portion wound along the outer side wall of the substrate.

摘要翻译： 提供梯度线圈。 梯度线圈包括：第一层，由第一多圈线组成; 以及由第二多圈线组成的第二层线圈。 第一和第二多圈线中的线的每一圈都沿着圆柱形基板的侧壁圆周，并且第一和第二多圈线中的每根线都包括沿着第一和第二多个线的内侧壁缠绕的第一部分 衬底和沿衬底的外侧壁缠绕的第二部分。