A system and a method for starting a rotor of an implantable blood pump are described. For example, a blood pump system includes a rotary motor having a stator and a rotor. The rotor has permanent magnetic poles for magnetic levitation of the rotor, and the stator has a plurality of pole pieces arranged circumferentially at intervals. The blood pump system includes a controller configured to control a start phase of the rotor, wherein the start phase is prior to the rotor being positioned in a predefined geometric volume for pumping blood and wherein the start phase includes performing a rotation of the rotor by an angle larger than an angle corresponding to a quarter of an angular distance between two neighboring magnetic poles of the rotor.

A blood pump includes a rotor mounted in a pump housing via a bearing. The housing includes a metal rod extending from the outer wall of the housing towards the inner side of the housing. The rod allows dissipating heat and has a stabilizing action.

A magnetic coupling suspension pump includes a stator body and a rotor. The stator body includes a magnetic suspension stator assembly and a magnetic coupler stator assembly; the rotor includes a magnetic suspension rotor assembly and a magnetic coupler rotor assembly; the magnetic suspension stator assembly and the magnetic suspension rotor assembly constitute a magnetic suspension assembly, and the magnetic suspension assembly is configured to generate radial uni-polar magnetic poles and magnetic fields arranged along a circumferential direction, resulting in that the rotor suspends; and the magnetic coupler stator assembly and the magnetic coupler rotor assembly constitute a magnetic coupler assembly, and the magnetic coupler assembly is configured to generate radial non-zero even number of periodic magnetic poles and magnetic fields arranged along the circumferential direction, resulting in that the rotor rotates.

An unloading blood pump includes a casing suitable for being incorporated into a human body, a turbine rotated by a rotor, a pumping chamber body mounted in a casing housing the turbine, an inlet port for sucking the blood from a suction cannula to the pumping chamber body and an outlet port for expelling blood from the pumping chamber to a reinjection cannula, wherein the pump is configured, depending on its power supply, to allow a nominal constant continuous flow of between 0.05 L/min and 0.5 L/min in order to reduce a capillary pressure of the lungs and/or of the left atrium and/or of the left ventricle.

The present application relates to an implantable blood pump for assisting a heart function. The blood pump comprises a heat source and a wall that delimits a flow cannel. In addition, the blood pump comprises a heat distributor for distributing heat generated by the heat source to a surface of the wall. In order to transfer heat from the heat source to the blood conveyed in the flow channel, the heat distributor is thermally conductively connected to the heat source and thermally conductively connected to the opposite face of the wall from the flow channel.

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.

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.

A heart pump including: a housing forming a cavity including: at least one inlet aligned with an axis of the cavity; and, at least one outlet provided in a circumferential outer wall of the cavity; an impeller provided within the cavity, the impeller including vanes for urging fluid from the inlet to the outlet; and, a drive for rotating the impeller in the cavity and wherein a flow path through the pump has a minimal cross-sectional area of at least 50 mm.sup.2.

A method is provided for producing a bearing arrangement for an implantable blood pump. A bearing arrangement and an implantable blood pump are also provided. In the method, a rotor may be provided having one or more drive magnets. The rotor has a conveying element. In addition, a stator having stator windings is provided. Furthermore, the rotor is arranged in a flow channel formed by an inside wall of the stator. A rotor rotation is then driven. While the rotor rotation is driven, a deflection of the rotor is determined. In addition, the deflection of the rotor may be corrected by applying, removing, magnetizing and/or demagnetizing magnetically active material on the stator and/or on the rotor in a non-rotationally symmetrical manner.

A method is provided for producing a bearing arrangement for an implantable blood pump. A bearing arrangement and an implantable blood pump are also provided. In the method, a rotor may be provided having one or more drive magnets. The rotor has a conveying element. In addition, a stator having stator windings is provided. Furthermore, the rotor is arranged in a flow channel formed by an inside wall of the stator. A rotor rotation is then driven. While the rotor rotation is driven, a deflection of the rotor is determined. In addition, the deflection of the rotor may be corrected by applying, removing, magnetizing and/or demagnetizing magnetically active material on the stator and/or on the rotor in a non-rotationally symmetrical manner.