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。