Magnetically levitated pump
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United States of America Patent
Stats
-
Jun 10, 2003
Grant Date -
Aug 23, 2001
app pub date -
Dec 27, 2000
filing date -
Dec 27, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A pump portion is provided with an impeller internal to a casing. The impeller is coupled with a rotor physically out of contact therewith and it is also supported by a controlled, magnetic bearing portion physically out of contact therewith. The impeller is rotated by a motor to discharge fluid. A position sensor detects the impeller position in levitation and in response to the sensor's output the magnetic bearing portion is controlled. The magnetic bearing portion is configured of a plurality of electromagnets formed of a magnetic pole, a yoke and a coil. The electromagnet has magnetic S and N poles each with at least yoke and coil arranged circumferentially.
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