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US 2016/0235899 A1Published application
System and method for controlling the position of a levitated rotor
AssigneeThoratec Corporation
InventorsShunzhou Yu, Alexander Medvedev, Ren You
Life of this patent
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Abstract
A rotary machine is provided which may include a rotor and a stator within a housing. The stator may be for generating a rotating magnetic field for applying a torque to the rotor. A commutator circuit may provide a plurality of phase voltages to the stator, and a controller may adjust the plurality of phase voltages provided by the commutator circuit to modify an attractive force of the stator on the rotor to move the rotor in an axial direction.
Claims20
A blood pump, comprising:
- a rotor within a housing;
- a stator for generating a rotating magnetic field for applying a torque to the rotor;
- a commutator circuit for providing a plurality of phase voltages to the stator;
- and
- a controller for adjusting the plurality of phase voltages provided by the commutator circuit to modify a magnetic force of the stator on the rotor to control a position of the rotor in an axial direction.
2 more elements
A method of operating a blood pump, wherein the method comprises:
- applying a rotating magnetic field with a stator to rotate a rotor;
- applying a first axial force on the rotor;
- applying at least a second axial force on the rotor, wherein a combination of the first axial force and at least the second axial force suspends the rotor at a first balanced position;
- and
- modifying the at least second axial force such that the impeller is suspended at a second balance position.
2 more elements
Dependencies are inferred from the claim text.