A magnetic bearing contactlessly supporting a rotor by magnetic force includes: a bearing rotor member made of a magnetic material; and a bearing stator member arranged around bearing rotor member. The bearing stator member includes a core made of a magnetic material and a coil wound around the core. A longitudinal cross-sectional shape of the core has a first part extending in a first direction orthogonal to a direction opposed to the bearing rotor member and wound around with the coil, a pair of second parts extending from both end portions in the first direction of first part to the bearing rotor member side and subsequently extending in a direction approaching each other in the first direction, and a pair of third parts extending from respective distal end portions of the pair of second parts toward the bearing rotor member side. The bearing rotor member also includes a permanent magnet.

A heart pump including a housing forming a cavity including at least one inlet and at least one outlet, an impeller provided within the cavity, the impeller including vanes for urging fluid from the inlet to the outlet upon rotation of the impeller, a drive that rotates the impeller within the cavity, a magnetic bearing including at least one bearing coil that controls an axial position of the impeller within the cavity and a controller. The controller includes an electronic processing device that monitors changes in a bearing indicator in response to a perturbation in blood flow, the bearing indicator being at least partially indicative of operation of the magnetic bearing and controls the drive to thereby selectively change a rotational speed of the impeller at least partially in accordance with changes in the bearing indicator.

Methods, systems, and devices for a mechanical circulatory support system are disclosed herein. An implantable power supply can be part of a mechanical circulatory support system. The implantable power supply can include one or several energy storage components, a power source, a voltage converter, and an output bus. Power can be provided to the voltage converter from one or both of the power source and the first energy storage component. The voltage converter can convert the voltage of the power from a first voltage to a second voltage and can power the output bus.

A heart pump including a housing forming a cavity including at least one inlet and at least one outlet, an impeller provided within the cavity, the impeller including vanes for urging fluid from the inlet to the outlet upon rotation of the impeller, a drive that rotates the impeller within the cavity, a magnetic bearing including at least one bearing coil that controls an axial position of the impeller within the cavity and a controller. The controller includes an electronic processing device that monitors changes in a bearing indicator in response to a perturbation in blood flow, the bearing indicator being at least partially indicative of operation of the magnetic bearing and controls the drive to thereby selectively change a rotational speed of the impeller at least partially in accordance with changes in the bearing indicator.

The present disclosure relates to a stiffness enhancing mechanism for a magnetic suspension bearing, a magnetic suspension bearing including the stiffness enhancing mechanism, and a blood pump. The magnetic suspension bearing comprises a stator with stator teeth and a rotor disposed within the stator. The stiffness enhancing mechanism comprises: a rotor permanent magnet, a stator permanent magnet, and an axial driving body. The rotor permanent magnet and the rotor of the magnetic suspension bearing form a rotor assembly, which has an asymmetric structure with respect to the main plane (P) of the rotor. The stiffness enhancing mechanism is configured such that the stator permanent magnet generates a radial attractive force to the rotor permanent magnet, and the axial driving body generates an axial repulsive force to the rotor permanent magnet, wherein the magnitude of the axial repulsive force is variable with a change of an axial distance between the axial driving body and the rotor permanent magnet). The stiffness enhancing mechanism can increase the torsional stiffness of the rotor of the magnetic suspension bearing and facilitate the miniaturization of the magnetic suspension bearing.

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 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.

The present disclosure relates to a magnetic suspension motor (10) and a magnetic suspension blood pump. The magnetic suspension motor (10) comprises a stator assembly (11) and a rotor assembly (12) disposed above the stator assembly (11), with an axial gap (13) provided between the stator assembly (11) and the rotor assembly (12). The stator assembly (11) comprises a stator base (111), a plurality of stator teeth (112) distributed along a circumference of the stator base (111) and extending upward from an upper surface of the stator base (111), and a stator thrust body (114) arranged in an internal cavity enclosed by the plurality of stator teeth (112), wherein the stator teeth (112) are wound with stator coils (113). The rotor assembly (12) comprises a rotor ring (121), a rotor driving magnet (122) disposed on a lower surface of the rotor ring (121), and a rotor thrust magnet (124) disposed in an inner cavity of the rotor ring (121). The stator thrust body (114) and the rotor thrust magnet (124) are configured to generate axial magnetic lines and generate axial repulsive force therebetween. The rotor driving magnet (122) comprises a plurality of portions (123), wherein each portion (123) is magnetized along an axial direction and adjacent portions (123) have opposite magnetization directions, so that the rotor driving magnet (122) has a plurality of alternating magnetic poles.

The present disclosure relates to a magnetic suspension motor (10) and a magnetic suspension blood pump. The magnetic suspension motor (10) comprises a stator assembly (11) and a rotor assembly (12) disposed above the stator assembly (11), with an axial gap (13) provided between the stator assembly (11) and the rotor assembly (12). The stator assembly (11) comprises a stator base (111), a plurality of stator teeth (112) distributed along a circumference of the stator base (111) and extending upward from an upper surface of the stator base (111), and a stator thrust body (114) arranged in an internal cavity enclosed by the plurality of stator teeth (112), wherein the stator teeth (112) are wound with stator coils (113). The rotor assembly (12) comprises a rotor ring (121), a rotor driving magnet (122) disposed on a lower surface of the rotor ring (121), and a rotor thrust magnet (124) disposed in an inner cavity of the rotor ring (121). The stator thrust body (114) and the rotor thrust magnet (124) are configured to generate axial magnetic lines and generate axial repulsive force therebetween. The rotor driving magnet (122) comprises a plurality of portions (123), wherein each portion (123) is magnetized along an axial direction and adjacent portions (123) have opposite magnetization directions, so that the rotor driving magnet (122) has a plurality of alternating magnetic poles.

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.