发明名称 |
IMPELLER POSITION COMPENSATION USING FIELD ORIENTED CONTROL |
摘要 |
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 ftrst 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. |
申请公布号 |
WO2014116676(A1) |
申请公布日期 |
2014.07.31 |
申请号 |
WO2014US12511 |
申请日期 |
2014.01.22 |
申请人 |
THORATEC CORPORATION |
发明人 |
YANAI, MASAMICHI;CAMPAU, JEFFREY;NANNA, JASON C. |
分类号 |
A61M1/12 |
主分类号 |
A61M1/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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