发明名称 |
STARTUP SEQUENCE FOR CENTRIFUGAL PUMP WITH LEVITATED IMPELLER |
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 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. |
申请公布号 |
EP2961984(A4) |
申请公布日期 |
2017.02.22 |
申请号 |
EP20140756822 |
申请日期 |
2014.02.24 |
申请人 |
Thoratec Corporation |
发明人 |
YANAI, Masamichi;CAMPAU, Jeffrey H.;CORVESE, Russel J.;NANNA, Jason C. |
分类号 |
F04B17/00;A61M1/10;A61M1/12 |
主分类号 |
F04B17/00 |
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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