Abstract: A rotor includes magnets and a core including arcuately arranged pole segments. Each pole segment includes first and second prongs that extend away from the rotor axis and are at least in part arcuately spaced apart to define a cutout therebetween. Each pair of arcuately adjacent pole segments defines therebetween a respective magnet-receiving slot, with the first prong of one of the pole segments and the second prong of the other of the pole segments defining the slot. The magnets are received in slots, such that each of the magnets is at least in part interposed between one of the pairs of adjacent pole segments. The magnets and the pole segments are dimensioned and configured so that at least one of the first and second prongs is deflected by the magnet received in the respective slot, such that the prongs cooperatively apply a clamping force on the magnet.

Abstract: A vibration motor having an insulating housing, a bidirectional coil and a magnetic ring is provided. The insulating housing is of cylindrical shape and at least three position-limiting ribs are protruded from an internal surface thereof. Each position-limiting rib is extended parallel to a central axial line of the insulating housing. The insulating housing has a pair of end plates on two ends thereof. The end plates are made of insulating material. The bidirectional coil is accommodated in the insulating housing and spaced apart from the internal surface of the insulating housing. The magnetic ring is movably accommodated in the insulating housing, and the magnetic ring is arranged coaxially with the insulating housing to surround the bidirectional coil. The position-limiting ribs are disposed adjacent to the magnetic ring and surround an outer edge of the magnetic ring.

Abstract: Various methods and systems are provided for thermal management of an electric motor via a coolant flow around portions of the electric motor, where the coolant flow is disrupted by an arrangement of pin-fins. In one example, an electric motor comprises: a casing including a coolant inlet arranged opposite to a coolant outlet across a central axis of the electric motor; a stator housed within the casing and forming a plurality of pin-fins extending straight outward radially, relative to the central axis, from outer circumferential surfaces of the stator in a staggered arrangement around an entire perimeter of the stator; and a plurality of clearances formed between adjacent pin-fins of the plurality of pin-fins, the plurality of clearances adapted to flow a coolant from the coolant inlet to the coolant outlet.

Abstract: An electric machine includes a stator and a rotor. The rotor includes stacked laminations forming a rotor core. The rotor rotates relative to the stator about a central axis. The rotor core has an outer diameter. Each lamination includes a plurality of magnet slots. Each magnet slot includes a ferrite permanent magnet located therein, adjacent pairs of the ferrite permanent magnets defining a number of poles. Each of the laminations includes a plurality of non-circular rotor bar apertures spaced about the central axis of the rotor and disposed adjacent to and radially inward of the rotor outer diameter. A non-cylindrical rotor bar is disposed in each respective of the plurality of rotor bar apertures. The rotor bars are formed of a conductive material, wherein at least some of the plurality of rotor bars collectively form a rotor bar cage.

Abstract: A rotor for a rotary electric machine includes a rotor core in which a plurality of magnetic pole portions is provided. Each of the magnetic pole portions includes: a magnet insertion hole into which a permanent magnet is inserted. A d-axis-side space portion is provided inside the magnet insertion hole between the d-axis-side end portion of the permanent magnet and the d-axis-side end portion of the magnet insertion hole, and a q-axis-side space portion penetrating in the axial direction is provided inside the magnet insertion hole between the q-axis-side end portion of the permanent magnet and the q-axis-side end portion of the magnet insertion hole. The permanent magnet further includes: a first communication portion communicating the d-axis-side end portion with the q-axis-side end portion; and a second communication portion communicating the d-axis-side end portion with the q-axis-side end portion.

Abstract: An axial flux electric motor for an automobile includes a stator assembly, and a rotor assembly, the rotor assembly including a plurality of lamination blocks arranged in an annular pattern, a plurality of conductive wedges, one conductive wedge being positioned between each adjacent pair of lamination blocks, the plurality of lamination blocks and the plurality of conductive wedges defining a rotor core disk having an inner diameter and outer diameter and opposing axial faces, and a plurality of permanent magnets attached to one of the opposing axial faces of the rotor core disk.

Abstract: The invention relates to a permanent magnet motor, comprising: a stator configured for generating a time-varying magnetic field; a rotor, arranged inside of the stator, comprising at least one permanent magnet providing a constant magnetic field; the permanent magnet being made of a flexible material; the stator being configured for rotating the rotor by taking along the constant magnetic field of the rotor with the time-varying magnetic field of the stator; the rotor comprising a field weakening mechanical arrangement configured for weakening a flux of the permanent magnet motor; the field weakening mechanical arrangement supporting the permanent magnet and comprising a recess configured for allowing the permanent magnet to be deformed by a centrifugal force provided by the rotation of the rotor.

Abstract: A stator core assembly for an axial flux electric motor for an automobile includes a cylindrical outer case that defines a central axis, first and second disk shaped insulate frames axially spaced from one another and positioned within the outer case, each of the first and second insulate frames including a circular outer ring, a circular inner ring and a plurality of radial spokes extending between the outer ring and the inner ring and spaced circumferentially about the central axis, and a plurality of segmented core sections extending axially between the first and second insulate frames spaced circumferentially around and supported by the first and second insulate frames, wherein, a radial spoke is positioned between each adjacent pair of segmented core sections, and at least one radial spoke extends across each axial end of each one of the plurality of segmented core sections.