Abstract: A magnetic bearing (20; 220; 320) comprises: a rotor (22; 322) to be supported for rotation about an axis (502); a stator (24; 224) extending from a first end (30) to a second end (32) and comprising: one or more first permanent magnets (50); one or more second permanent magnets (52) axially spaced from the one or more first permanent magnets; one or more intermediate permanent magnets (60; 230; 232) axially between the one or more first permanent magnets and one or more second permanent magnets; laminate teeth (64A, 64B, 66A, 66B) radially inward of the one or more intermediate permanent magnets; and a plurality of radial windings (34A, 34B, 36A, 36B), respectively encircling a respective associated tooth of the plurality of teeth.

Abstract: A stator includes a core and a coolant jacket. The core has an outer surface extending about a rotation axis and defining one or more surface discontinuity within the outer surface. The coolant jacket is deposited on the outer surface of the core and has two or more layers conformally disposed on the outer surface of the core, the coolant jacket inhabiting the one or more surface discontinuity. Electrical machines, motor-type electrical machines, and methods of making stators are also described.

Abstract: A magnetic bearing (20) comprises: a rotor (22) to be supported for rotation about an axis (502); a stator (24) extending from a first end (30) to a second end (32) and comprising: one or more first permanent magnets (50); one or more second permanent magnets (52) of polarity substantially opposite to a polarity of the one or more first permanent magnets; and laminate teeth, encircled by radial windings (36A, 36B), axially between and extending radially inward of the one or more first permanent magnets on one side and the one or more second permanent magnets on the other side. The rotor comprises: one or more third permanent magnets (150); and one or more fourth permanent magnets (152) axially spaced from the one or more third permanent magnets.

Abstract: A motor includes a plurality of ends, including a first end and an opposing second end, an outer surface of the magnetic carrier extends between the ends, and a plurality of magnetic poles including a first magnetic pole and a second magnetic pole, the plurality of magnetic poles disposed on the magnet carrier, extending between the ends, and being adjacent on the outer surface of the magnet carrier, wherein each of the plurality of poles comprising an array of magnets, each magnet in the array of magnets being a permanent magnet, each array of magnets comprising a plurality of magnets including a first magnet and a second magnet, the plurality of magnets differing from each other in one or more of material and magnetic field strength (MGOe), wherein the first plurality of magnets and the second plurality of magnets are adjacently disposed within the array of magnets.

Abstract: A rotary encoder may include a magnetic encoder disc having a plurality of magnetic features added to the disc by additive manufacturing distributed over a surface of the encoder disc, wherein the disc is configured for attachment to the end of a rotatable shaft, or a cylindrical metallic encoding feature having a plurality of magnetic features added to the cylindrical encoder by additive manufacturing distributed over the surface of the cylindrical encoding feature, wherein the encoding feature is capable of attachment to an outer diameter of the rotatable shaft. The encoder additionally includes a magnetic sensor positioned adjacent to the end of the rotatable shaft to detect magnetic signals from the magnetic features on the disc and/or positioned over the surface of the rotatable shaft to detect magnetic signals from the magnetic features on the encoding feature.

Abstract: A stator core is described herein comprising a plurality of individually wound stator segments, wherein a first of said plurality of individually wound stator segments has a T-shaped cross-section wherein the top part of the T-shape is formed by a back iron section and the bottom part of the T-shape is formed by a tooth section, and wherein a coil of conductive wire is individually wound around the tooth section of the stator core segment and wherein said coil comprises a first terminal at its first end and a second terminal at its second end, and wherein each terminal is configured to be connectable to and detachable from a terminal of a second individually wound stator segment. A method for assembling such an individually wound stator core is also described herein.

Abstract: Disclose is a machine including: an inner stator having a plurality of radially outwardly extending teeth; an outer stator having a plurality of radially inwardly extending teeth that are offset from the radially outwardly extending teeth; a rotor including an extension between the plurality of stators, the extension including a plurality of rotor magnet slots and a plurality of flux barrier slots; the plurality of rotor magnet slots and the plurality of flux barrier slots contact one another and are arranged in a circumferentially alternating sequence, one after another, such that each of the rotor magnet slots is circumferentially bounded by a pair of the flux barrier slots; and a portion of each of the plurality of rotor magnet slots is disposed along a machine radial axis and/or a portion of each of the plurality of flux barrier slots is disposed at an angle to the machine radial axis.

Abstract: A magnetic bearing (20) has: a rotor (22) to be supported for rotation about an axis (502); and a stator (24) extending from a first end (30) to a second end (32). The stator has: a circumferential outer winding (50); a circumferential inner winding (52); a radial spacing (54) between the inner winding and the outer winding; a plurality of laminate teeth (84A, 84B, 86A, 86B); and a plurality of radial windings (34A, 34B, 36A, 36B) respectively encircling a respective associated tooth of the plurality of teeth. A plurality of magnetic flux paths are respectively associated with the plurality of radial windings and pass: radially through the associated winding; axially through the radial spacing; radially from the radial spacing to the rotor; and axially along the rotor.

Abstract: Disclosed is a stator having: a first member having a first plurality of axially opposing ends including a first front end and a first back end mutually spaced along a first stator center axis, a first outer diameter (OD) side and a first inner diameter (ID) side, wherein first member comprises laminated steel; a plurality of cooling features disposed directly against the first member, wherein the plurality of fins spans between the first plurality of axially opposing ends of the first member, and wherein: the stator comprises a base layer disposed directly against the first member, between the first member and the cooling features, thereby reducing an interface contact resistance between the first member and the plurality of cooling features.

Abstract: A stator includes a core and a coolant jacket. The core has an outer surface extending about a rotation axis and defining one or more surface discontinuity within the outer surface. The coolant jacket is deposited on the outer surface of the core and has two or more layers conformally disposed on the outer surface of the core, the coolant jacket inhabiting the one or more surface discontinuity. Electrical machines, motor-type electrical machines, and methods of making stators are also described.

Abstract: A planar member for a stator stack comprises a stator yoke defining a central longitudinal axis, a first surface facing radially outward, and a second surface facing radially inward, a tooth extending radially inwards from the second surface, a first tooth tip extending circumferentially from a radially inward end of the tooth, a second tooth tip extending circumferentially from the radially inward end of the tooth, a first slot portion defined between the first tooth tip and the second surface, a second slot portion defined between the second tooth tip and the second surface, and a slot cooling fin extending radially from the stator yoke into the first slot portion.

Abstract: A planar member for a stator stack comprises a stator yoke defining a central longitudinal axis, a first surface facing radially outward, and a second surface facing radially inward, a tooth extending radially inwards from the second surface, a first tooth tip extending circumferentially from a radially inward end of the tooth, a second tooth tip extending circumferentially from the radially inward end of the tooth, a first slot portion defined between the first tooth tip and the second surface, a second slot portion defined between the second tooth tip and the second surface, and a slot cooling fin extending into the first slot portion.

Abstract: An electrical machine (20) has a stator (22) comprising: a core (50) having a first end (52) and a second end (54); one or more windings carried by the core and having: one or more first portions (62) protruding from the first end; and one or more second portions (64) protruding from the second end. A rotor (24) is mounted for rotation relative to the stator about an axis (500, 502). One or more chambers (70, 72) surround the one or more first portions and the one or more second portions. Ferromagnetic particles are in a fluid in the one or more chambers. The machine has means (80, 82, 104, 106) for varying a concentration of the ferromagnetic particles in the one or more chambers.

Abstract: Disclosed is a stator having: a first member having a first plurality of axially opposing ends including a first front end and a first back end mutually spaced along a first stator center axis, a first outer diameter (OD) side and a first inner diameter (ID) side, wherein first member comprises laminated steel; a plurality of cooling features disposed directly against the first member, wherein the plurality of fins spans between the first plurality of axially opposing ends of the first member, and wherein: the stator comprises a base layer disposed directly against the first member, between the first member and the cooling features, thereby reducing an interface contact resistance between the first member and the plurality of cooling features.

Abstract: A magnetic bearing (20; 220; 320) comprises: a rotor (22; 322) to be supported for rotation about an axis (502); a stator (24; 224) extending from a first end (30) to a second end (32) and comprising: one or more first permanent magnets (50); one or more second permanent magnets (52) axially spaced from the one or more first permanent magnets; one or more intermediate permanent magnets (60; 230; 232) axially between the one or more first permanent magnets and one or more second permanent magnets; laminate teeth (64A, 64B, 66A, 66B) radially inward of the one or more intermediate permanent magnets; and a plurality of radial windings (34A, 34B, 36A, 36B), respectively encircling a respective associated tooth of the plurality of teeth.

Abstract: Disclosed is a motor including a plurality of ends, including a first end and an opposing second end, an outer surface of the magnetic carrier extends between the ends, and a plurality of magnetic poles including a first magnetic pole and a second magnetic pole, the plurality of magnetic poles disposed on the magnet carrier, extending between the ends, and being adjacent on the outer surface of the magnet carrier, wherein each of the plurality of poles comprising an array of magnets, each magnet in the array of magnets being a permanent magnet, each array of magnets comprising a plurality of magnets including a first magnet and a second magnet, the plurality of magnets differing from each other in one or more of material and magnetic field strength (MGOe), wherein the first plurality of magnets and the second plurality of magnets are adjacently disposed within the array of magnets.

Abstract: A rotary encoder may include a magnetic encoder disc having a plurality of magnetic features added to the disc by additive manufacturing distributed over a surface of the encoder disc, wherein the disc is configured for attachment to the end of a rotatable shaft, or a cylindrical metallic encoding feature having a plurality of magnetic features added to the cylindrical encoder by additive manufacturing distributed over the surface of the cylindrical encoding feature, wherein the encoding feature is capable of attachment to an outer diameter of the rotatable shaft. The encoder additionally includes a magnetic sensor positioned adjacent to the end of the rotatable shaft to detect magnetic signals from the magnetic features on the disc and/or positioned over the surface of the rotatable shaft to detect magnetic signals from the magnetic features on the encoding feature.

Abstract: A magnetic position sensing system includes at least one annular magnet mounted to a surface of a rotating body. The annular magnet includes a first end, a second end, an inner diameter surface, and an outer diameter surface. The inner diameter surface and outer diameter surface define a radial thickness therebetween, and the radial thickness varies from the first end to the second end.

Abstract: A planar member for a stator stack comprises a stator yoke defining a central longitudinal axis, a first surface facing radially outward, and a second surface facing radially inward, a tooth extending radially inwards from the second surface, a first tooth tip extending circumferentially from a radially inward end of the tooth, a second tooth tip extending circumferentially from the radially inward end of the tooth, a first slot portion defined between the first tooth tip and the second surface, a second slot portion defined between the second tooth tip and the second surface, and a slot cooling fin extending into the first slot portion.

Abstract: A stator assembly of an electric includes a plurality of ring structures centered to an axis. Each one of the plurality of ring structures includes a ring and a plurality of cooling fins projecting radially from and spaced circumferentially about the ring. Each ring structure is disposed axially adjacent to another ring structure of the plurality of ring structures.