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    Verification of magnetic balance for magnetically levitated impeller
    3.
    发明授权
    Verification of magnetic balance for magnetically levitated impeller 有权
    验证磁悬浮叶轮的磁平衡

    公开(公告)号：US09127680B2

    公开(公告)日：2015-09-08

    申请号：US13857441

    申请日：2013-04-05

    Applicant: THORATEC CORPORATION

    Inventor： Masamichi Yanai ,  Jason C. Nanna

    IPC: G01M1/02 ,  F04D15/00 ,  A61M1/10 ,  F04D29/048

    CPC classification number: F04D15/0088 ,  A61M1/101 ,  A61M1/1015 ,  A61M1/1031 ,  A61M1/1086 ,  A61M1/122 ,  F04D29/048

    Abstract: The magnetic balance is verified of a magnetically-levitated impeller of a centrifugal pump with a pump housing having levitation magnets. The impeller includes embedded magnets and is movable within a chamber in the pump housing between first and second sides of the chamber. The centrifugal pump is mounted on an acceleration fixture while the impeller is held against a predetermined one of the first and second sides by the levitation magnets. A plurality of predetermined accelerations are applied to the acceleration fixture to exert a plurality of different forces of acceleration on the impeller. A determination is made whether the impeller detaches from the predetermined side as a result of each different force of acceleration to identify adjacent forces for which a transition occurs between detaching and not detaching. The transition is compared with a desired retention force to determine whether the pump achieves magnetic balance.

    Abstract translation: 通过具有悬浮磁体的泵壳体的离心泵的磁悬浮叶轮来验证磁平衡。 叶轮包括嵌入式磁体，并且可在腔室的第一和第二侧之间的泵壳体内的腔室内移动。 离心泵安装在加速装置上，同时叶轮通过悬浮磁体固定在第一和第二侧的预定的一个上。 多个预定的加速度被施加到加速夹具以在叶轮上施加多个不同的加速力。 确定叶轮是否由于每个不同的加速力而从预定侧分离，以识别在分离和不分离之间发生转变的相邻的力。 将过渡与期望的保持力进行比较以确定泵是否实现磁平衡。

    VERIFICATION OF MAGNETIC BALANCE FOR MAGNETICALLY LEVITATED IMPELLER
    4.
    发明申请
    VERIFICATION OF MAGNETIC BALANCE FOR MAGNETICALLY LEVITATED IMPELLER 有权
    磁力液压叶轮的磁平衡验证

    公开(公告)号：US20140298905A1

    公开(公告)日：2014-10-09

    申请号：US13857441

    申请日：2013-04-05

    Applicant: THORATEC CORPORATION

    Inventor： Masamichi Yanai ,  Jason C. Nanna

    IPC: G01M1/02

    CPC classification number: F04D15/0088 ,  A61M1/101 ,  A61M1/1015 ,  A61M1/1031 ,  A61M1/1086 ,  A61M1/122 ,  F04D29/048

    Abstract: The magnetic balance is verified of a magnetically-levitated impeller of a centrifugal pump with a pump housing having levitation magnets. The impeller includes embedded magnets and is movable within a chamber in the pump housing between first and second sides of the chamber. The centrifugal pump is mounted on an acceleration fixture while the impeller is held against a predetermined one of the first and second sides by the levitation magnets. A plurality of predetermined accelerations are applied to the acceleration fixture to exert a plurality of different forces of acceleration on the impeller. A determination is made whether the impeller detaches from the predetermined side as a result of each different force of acceleration to identify adjacent forces for which a transition occurs between detaching and not detaching. The transition is compared with a desired retention force to determine whether the pump achieves magnetic balance.

    Abstract translation: 通过具有悬浮磁体的泵壳体的离心泵的磁悬浮叶轮来验证磁平衡。 叶轮包括嵌入式磁体，并且可在腔室的第一和第二侧之间的泵壳体内的腔室内移动。 离心泵安装在加速装置上，同时叶轮通过悬浮磁体固定在第一和第二侧的预定的一个上。 多个预定的加速度被施加到加速夹具以在叶轮上施加多个不同的加速力。 确定叶轮是否由于每个不同的加速力而从预定侧分离，以识别在分离和不分离之间发生转变的相邻的力。 将过渡与期望的保持力进行比较以确定泵是否实现磁平衡。

    STARTUP SEQUENCE FOR CENTRIFUGAL PUMP WITH LEVITATED IMPELLER
    5.
    发明申请
    STARTUP SEQUENCE FOR CENTRIFUGAL PUMP WITH LEVITATED IMPELLER 有权
    带有液压叶轮的离心泵的启动顺序

    公开(公告)号：US20140241904A1

    公开(公告)日：2014-08-28

    申请号：US13778411

    申请日：2013-02-27

    Applicant: THORATEC CORPORATION

    Inventor： Masamichi Yanai ,  Jeffrey H. Campau ,  Russel J. Corvese ,  Jason C. Nanna

    IPC: F04D1/00

    CPC classification number: F04D1/00 ,  A61M1/101 ,  A61M1/1015 ,  A61M1/1086 ,  A61M1/122 ,  A61M2205/3334 ,  F04D13/0633 ,  F04D29/048

    Abstract: A centrifugal pump system having an impeller rotating with first and second magnetic structures on opposite surfaces. A levitation magnetic structure is disposed at a first end of a pump housing having a levitating magnetic field for axially attracting the first magnetic structure. A multiphase magnetic stator at a second end of the pump housing generates a rotating magnetic field for axially and rotationally attracting the second magnetic structure. A commutator circuit provides a plurality of phase voltages to the stator. A sensing circuit determines respective phase currents. A controller calculates successive commanded values for the phase voltages during a running state in response to a desired impeller speed and an actual impeller phase. The controller has a startup interval during which the commanded values of the phase voltages are determined in response to a pseudo impeller phase and in response to a ramping gain factor.

    Abstract translation: 一种离心泵系统，其具有在相对表面上以第一和第二磁性结构旋转的叶轮。 悬浮磁性结构设置在具有用于轴向吸引第一磁性结构的悬浮磁场的泵壳体的第一端。 在泵壳的第二端处的多相磁性定子产生用于轴向和旋转地吸引第二磁性结构的旋转磁场。 换向器电路向定子提供多个相电压。 感测电路确定各自的相电流。 控制器响应于期望的叶轮速度和实际叶轮相位，在运行状态期间计算相电压的连续命令值。 控制器具有启动间隔，在该启动间隔期间响应于假叶轮相位并且响应于斜坡增益因子来确定相电压的指令值。

    IMPELLER POSITION COMPENSATION USING FIELD ORIENTED CONTROL
    6.
    发明申请
    IMPELLER POSITION COMPENSATION USING FIELD ORIENTED CONTROL 有权
    使用面向对象的控制装置的叶轮位置补偿

    公开(公告)号：US20140205467A1

    公开(公告)日：2014-07-24

    申请号：US13748780

    申请日：2013-01-24

    Applicant: THORATEC CORPORATION

    Inventor： Masamichi Yanai ,  Jeffrey H. Campau ,  Jason C. Nanna

    IPC: F04B35/04

    CPC classification number: F04D15/0094 ,  A61M1/101 ,  A61M1/1012 ,  A61M1/1015 ,  A61M1/1017 ,  A61M1/1031 ,  A61M1/1036 ,  A61M1/1086 ,  A61M1/122 ,  A61M2205/3303 ,  A61M2205/3507 ,  F04B35/04 ,  F04D7/04 ,  F04D13/024 ,  F04D13/0666 ,  F04D15/0088 ,  F04D29/041 ,  F04D29/0473 ,  F04D29/048 ,  F04D29/22 ,  F04D29/426 ,  F04D29/428 ,  H02P6/18

    Abstract: A centrifugal pump system having an impeller rotating with first and second magnetic structures on opposite surfaces. A levitation magnetic structure is disposed at a first end of a pump housing having a levitating magnetic field for axially attracting the first magnetic structure. A multiphase magnetic stator at a second end of the pump housing generates a rotating magnetic field for axially and rotationally attracting the second magnetic structure. A commutator circuit provides a plurality of phase voltages to the stator. A sensing circuit determines respective phase currents. A controller calculates successive commanded values for the phase voltages in response to the determined phase currents and a variable commutation angle. The angle is selected to correspond to an axial attractive force of the stator that maintains a levitation of the impeller at a centered position within the pumping chamber.

    Abstract translation: 一种离心泵系统，其具有在相对表面上以第一和第二磁性结构旋转的叶轮。 悬浮磁性结构设置在具有用于轴向吸引第一磁性结构的悬浮磁场的泵壳体的第一端。 在泵壳的第二端处的多相磁性定子产生用于轴向和旋转地吸引第二磁性结构的旋转磁场。 换向器电路向定子提供多个相电压。 感测电路确定各自的相电流。 控制器响应于所确定的相电流和可变换流角来计算相电压的连续命令值。 角度被选择为对应于定子的轴向吸引力，其保持叶轮在泵送室内的中心位置的悬浮。

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