초록 ▼

In order to enable speedy and simple exchanging operation of impeller and casing by eliminating setting operation, a sensor output when the impeller is not floating is measured by an automatic neutral position setting circuit at the activation of an electromagnet as an active magnetic bearing, the s

In order to enable speedy and simple exchanging operation of impeller and casing by eliminating setting operation, a sensor output when the impeller is not floating is measured by an automatic neutral position setting circuit at the activation of an electromagnet as an active magnetic bearing, the sensor output is compared with a predetermined set value and difference therebetween is calculated, which difference is used for adjusting the sensor output.

대표청구항 ▼

[ What is claimed is:] [1.] A magnetically suspended centrifugal pump apparatus, comprising:a housing having a blood inlet port and a blood outlet port;a centrifugal blood pump having an impeller rotating in said housing and feeding blood by centrifugal force caused by rotation;a passive magnetic be

[ What is claimed is:] [1.] A magnetically suspended centrifugal pump apparatus, comprising:a housing having a blood inlet port and a blood outlet port;a centrifugal blood pump having an impeller rotating in said housing and feeding blood by centrifugal force caused by rotation;a passive magnetic bearing for controlling position of said impeller; andan active magnetic bearing including a position sensor for detecting the position of said impeller, and an electromagnet; whereinsaid impeller rotates maintained at a prescribed position in said housing by function of said passive and active magnetic bearings;said apparatus further comprisingautomatic neutral position setting means for measuring an output of said sensor when said impeller is not floating before activation of said active magnetic bearing, comparing the output of said sensor with a predetermined measured value and calculating difference therebetween, for adjusting said sensor output.