公开(公告)号：US06437567B1

公开(公告)日：2002-08-20

申请号：US09455430

申请日：1999-12-06

申请人： John Frederick Schenck ,  Ronald Dean Watkins ,  William Alan Edelstein ,  Sayed-Amr El-Hamamsy ,  Eddy B. Boskamp ,  Randy Otto John Giaquinto ,  John Andrew Mallick

发明人： John Frederick Schenck ,  Ronald Dean Watkins ,  William Alan Edelstein ,  Sayed-Amr El-Hamamsy ,  Eddy B. Boskamp ,  Randy Otto John Giaquinto ,  John Andrew Mallick

IPC分类号： G01V300

CPC分类号： G01R33/3415 ,  G01R33/34061 ,  G01R33/3806

摘要： A quadrature coil suitable for use with an open frame MRI system provides crossing pairs of arrays of parallel conductor elements, respectively. Compact configuration is provided through use of an isolating circuit for incorporating parasitic capacitances at the resonance frequency of the coil into a blocking parallel resonance. Termination of the parallel conductor elements may be accomplished by equal impedance node connectors formed from branching pairs of conductors or a triangular least resistance connection form. RF shields are provided by pairs of conductive sheets containing eddy current reducing slots aligned with the parallel conductors elements of the coil.

摘要翻译： 适用于开放式框架MRI系统的正交线圈分别提供平行导体元件的交叉对阵列。 通过使用用于将线圈的谐振频率处的寄生电容并入阻塞并联谐振的隔离电路来提供紧凑配置。 平行导体元件的端接可以通过由分支对导体或三角形最小电阻连接形式形成的等阻抗节点连接器来实​​现。 RF屏蔽件由包含与线圈的平行导体元件对准的涡流减小槽的导电片构成。

公开(公告)号：US06794884B2

公开(公告)日：2004-09-21

申请号：US10142342

申请日：2002-05-10

申请人： Gerald Burt Kliman ,  John Andrew Mallick ,  Manoj Ramprasad Shah ,  Sang Bing Lee

发明人： Gerald Burt Kliman ,  John Andrew Mallick ,  Manoj Ramprasad Shah ,  Sang Bing Lee

IPC分类号： G01R3106

CPC分类号： G01L1/12 ,  G01L5/0076 ,  G01R31/34

摘要： A method for evaluating core stack pressure includes: positioning a magnetic yoke near the core, the magnetic yoke being wound by an excitation winding; supplying current to the excitation winding to inject magnetic flux into the core; measuring a signal resulting from the injected magnetic flux; and using the measured signal to evaluate the core stack pressure. A system for implementing the method includes the magnetic yoke; a current supply for supplying the current; a sensor for measuring the signal; and a computer for using the measured signal to evaluate core stack pressure.

摘要翻译： 核心堆叠压力的评价方法包括：在磁​​芯附近定位磁轭，磁轭由励磁绕组缠绕; 向励磁绕组提供电流以将磁通量注入到芯中; 测量由注入的磁通量产生的信号; 并使用测量的信号来评估堆芯压力。 一种实现该方法的系统包括：磁轭; 用于供应电流的电流供应; 用于测量信号的传感器; 以及使用测量信号来评估芯堆叠压力的计算机。

公开(公告)号：US06208132B1

公开(公告)日：2001-03-27

申请号：US09184687

申请日：1998-11-02

申请人： Gerald Burt Kliman ,  John Andrew Mallick

发明人： Gerald Burt Kliman ,  John Andrew Mallick

IPC分类号： G01P348

CPC分类号： G01P3/487

摘要： A sensing coil affixed to the outside of an induction motor housing uses flux signals from the motor to measure motor speed. In particular, components of the rotor current are measured and compared to analysis from stator fundamentals and sidebands to determine the true rotor frequency which can then be used to determine the motor speed. A shield and/or a compensating coil can optionally be used to filter out extraneous signal noise.

摘要翻译： 固定在感应电动机壳体外部的感测线圈使用来自电动机的磁通信号来测量电动机速度。 特别地，测量转子电流的分量并将其与来自定子基本面和边带的分析进行比较，以确定真正的转子频率，然后可以用它来确定电机速度。 可以可选地使用屏蔽和/或补偿线圈来滤除外来信号噪声。

公开(公告)号：US06469504B1

公开(公告)日：2002-10-22

申请号：US09575715

申请日：2000-07-28

申请人： Gerald Burt Kliman ,  John Andrew Mallick ,  Manoj Ramprasad Shah

发明人： Gerald Burt Kliman ,  John Andrew Mallick ,  Manoj Ramprasad Shah

IPC分类号： G01N2772

CPC分类号： G01R31/34 ,  G01N27/9006

摘要： A method for detecting core faults includes (a) positioning a magnetic yoke near at least one tooth of the core, the magnetic yoke being wound by a winding; (b) supplying current to the winding to inject magnetic flux into the at least one tooth of the core; (c) measuring a signal resulting from the injected magnetic flux; and (d) using the measured signal to detect core faults.

摘要翻译： 用于检测铁芯故障的方法包括：（a）将磁轭定位在所述铁芯的至少一个齿附近，所述磁轭由绕组缠绕; （b）向所述绕组提供电流以将磁通量注入到所述芯的所述至少一个齿中; （c）测量由注入的磁通量产生的信号; 和（d）使用测量信号来检测核心故障。