Patent ID: 6575717
Filing Date: 2003-06-10
Classification: A61M,F04D,F16C

Abstract:
A magnetically levitated pump comprising:a pump portion having a rotative portion provided in a casing and rotated to discharge fluid; a rotation driving portion physically out of contact with said rotating portion, coupled with said rotative portion through magnetic force to rotatably drive said rotative portion; a position detection portion detecting a position of said rotative portion in levitation; and a controlled magnetic bearing portion physically out of contact with said rotative portion, supporting said rotative portion in response to an output corresponding to a result of detection provided by said position detection portion, wherein said magnetic bearing portion is configured of a plurality of electromagnets formed of a magnetic pole, a yoke and a coil, said electromagnets each having magnetic S and N poles, and all of said magnetic S and N poles being arranged in a common plane perpendicular to an axis of rotation of said rotative portion at a common radial distance about said axis of rotation.