Abstract: An electric machine includes a stator rotatably supporting a rotor, the rotor includes a stacked rotor laminations forming a rotor core with cavities having magnets arranged in the cavities through at least two adjacent rotor laminations and parallel to a rotor central axis, each lamination including an outer edge having grooves or scallops arranged asymmetrically about the circumference to reduce torque ripple. At least one groove or scallop may be arranged along a q-axis and at least one groove or scallop may be arranged between a q-axis and a d-axis of the rotor core. The laminations may be substantially identical with a first group of laminations flipped or rotated about a diametric axis relative to a second group of laminations. An electrified vehicle includes an electric machine powered by a traction battery, the electric machine having a rotor core with stacked rotor laminations having a scalloped outer edge.

Abstract: A stator for an electric machine includes slots for accommodating windings, the slots having a slot neck portion and a filling portion and extending radially between an inner circumference and an outer circumference of the stator, and including regular slots and misplaced slots. The slot neck portion of the misplaced slots has a dimension different from that of the regular slots. The plurality of slots and windings establish a plurality of phases, each phase occupying at least two adjacent slots, and the at least two adjacent slots include a regular slot and a misplaced slot resulting in reduced torque ripple and an associated reduction in vehicle NVH.

Abstract: An electrical connector for a vehicle provides integrated noise suppression and includes a housing having openings at both ends, conductors extending through the openings, a magnetic ring surrounding but spaced from the conductors, capacitors spaced from the magnetic ring and coupled to the conductors, and insulating filler disposed within the housing and contacting the magnetic ring and the capacitors.

Abstract: An electric machine stator includes a stator core having annular stator laminations arranged in a stack with each lamination includes a plurality of stator teeth, adjacent teeth defining corresponding tooth slots on an inner periphery. Each stator tooth slot includes a winding area and an opening area leading to the inner periphery and including a first side and a second side. The first side and the second side each have an inner and outer tooth top, the inner and outer tooth top of the first side and the inner and outer tooth top of the second side are respectively symmetrical with respect to a center line of the opening area, and the first side and the second side are asymmetric with respect to the center line.

Abstract: There is provided a current transferring device for an electric machine comprising a rotary bearing member fixed in a rotor shaft and rotating with it and a non-rotary component. The rotary bearing member includes a first compartment filled with a conducting fluid and having a first opening and a rotor positive connector that is in electrical contact with the conducting fluid therein and electrically connected to a rotor positive pole, and a second compartment filled with a conducting fluid and electrically insulated from the first compartment and having a second opening and a rotor negative connector that is in electrical contact with the conducting fluid therein and electrically connected to a rotor negative pole. The non-rotary component closes the first and second openings.

Abstract: An electric machine rotor includes a rotor core having pairs of magnets circumferentially distributed around the rotor core, each magnet pair forming a V-shaped configuration with an opening facing an outer periphery of the rotor core, and first and second slots inside the V-shaped configuration that form a magnetic bridge. Sides of the magnetic bridge are angled toward the outer periphery.

Abstract: An electrical connector for a vehicle provides integrated noise suppression and includes a housing having openings at both ends, conductors extending through the openings, a magnetic ring surrounding but spaced from the conductors, capacitors spaced from the magnetic ring and coupled to the conductors, and insulating filler disposed within the housing and contacting the magnetic ring and the capacitors.

Abstract: A stator core of an electric machine is formed by a plurality of laminations stacked in an axial direction with each lamination having a plurality of teeth extending toward the inner circumference in a radial direction forming a plurality of slots between adjacent teeth. The plurality of teeth of each lamination include first teeth with a first radial length and at least one second tooth with a second radial length. The second teeth of the plurality of laminations are arranged in the axial direction to form a fluid passage between first and second ends of the stator core.

Abstract: A stator for an electric machine includes slots for accommodating windings, the slots having a slot neck portion and a filling portion and extending radially between an inner circumference and an outer circumference of the stator, and including regular slots and misplaced slots. The slot neck portion of the misplaced slots has a dimension different from that of the regular slots. The plurality of slots and windings establish a plurality of phases, each phase occupying at least two adjacent slots, and the at least two adjacent slots include a regular slot and a misplaced slot resulting in reduced torque ripple and an associated reduction in vehicle NVH.

Abstract: There is provided a current transferring device for an electric machine comprising a rotary bearing member fixed in a rotor shaft and rotating with it and a non-rotary component. The rotary bearing member includes a first compartment filled with a conducting fluid and having a first opening and a rotor positive connector that is in electrical contact with the conducting fluid therein and electrically connected to a rotor positive pole, and a second compartment filled with a conducting fluid and electrically insulated from the first compartment and having a second opening and a rotor negative connector that is in electrical contact with the conducting fluid therein and electrically connected to a rotor negative pole. The non-rotary component closes the first and second openings.

Abstract: A motor rotor may include a body having axially extending first and second magnets embedded into the body, the first magnet and the second magnet being arranged at an angle and spaced apart by an axially extending magnetic shielding component. The first magnet includes a first surface away from a central axis of the rotor body and a second surface facing the central axis. The second magnet includes a third surface away from the central axis and a fourth surface facing the central axis, wherein the first surface and the third surface and extension surfaces thereof define a first area of the body part away from the central axis and a second area of the body part close to the central axis.

Abstract: A stator core for an electric motor may include a main body part formed by a plurality of stacked electromagnetic steel sheets, the main body part being provided with at least a first through hole extending axially with a first pin located in the first through hole. A first end cover is located at a first end of the main body part and connected to a first pin end of the first pin. A second end cover is located at a second end of the main body part and connected to a second pin end of the first pin. The connections of the first end cover and the second end cover to the first pin generate tensile stresses in the main body part to reduce core losses.

Abstract: An electric machine rotor includes a rotor core having pairs of magnets circumferentially distributed around the rotor core, each magnet pair forming a V-shaped configuration with an opening facing an outer periphery of the rotor core, and first and second slots inside the V-shaped configuration that form a magnetic bridge. Sides of the magnetic bridge are angled toward the outer periphery.

Abstract: An electric machine stator includes a stator core having annular stator laminations arranged in a stack with each lamination includes a plurality of stator teeth, adjacent teeth defining corresponding tooth slots on an inner periphery. Each stator tooth slot includes a winding area and an opening area leading to the inner periphery and including a first side and a second side. The first side and the second side each have an inner and outer tooth top, the inner and outer tooth top of the first side and the inner and outer tooth top of the second side are respectively symmetrical with respect to a center line of the opening area, and the first side and the second side are asymmetric with respect to the center line.

Abstract: A stator for a motor includes laminations arranged axially adjacently. A first lamination includes sub-yoke parts and tooth parts. The sub-yoke parts are spliced through a first yoke engaging part to form an annular first yoke part. The first tooth parts are assembled on an inner edge of the first yoke part through a first tooth engaging part. The second lamination includes sub-yoke parts and tooth parts. The sub-yoke parts are spliced through a second yoke engaging part to form an annular second yoke part. The second tooth parts are assembled on an inner edge of the second yoke part through a second tooth engaging part. The first and second tooth engaging parts are superposed in the axial direction. A method of manufacturing a stator for a motor is also described.

Abstract: A motor and stator include first and second laminations arranged adjacently in the axial direction. The laminations include sub-yoke parts and first tooth parts. The sub-yoke parts are spliced through a yoke engaging part to form a substantially annular yoke part. The tooth parts are assembled on an inner edge of the yoke part through a tooth engaging part. A first tooth engaging part and a second tooth engaging part are superposed in the axial direction, the first tooth engaging part being different from the second tooth engaging part. A method of manufacturing a stator for a motor is also disclosed.

Abstract: An electric machine operable as a motor or generator includes a stator having a body portion substantially in the shape of a hollow column with an outer wall and an inner wall. The body portion has a plurality of first slots and a plurality of second slots each running through the body portion in a longitudinal direction. The plurality of first slots are distributed in a circumferential direction between the outer wall and the inner wall, and the first slots are circumferentially closed slots. The plurality of second slots are distributed in the circumferential direction between the first slots and the inner wall, and the second slots are circumferentially closed slots and are spaced apart from the first slots.

Abstract: One or a plurality of embodiments of the present application provide a winding method for a stator winding.

Abstract: An electric machine includes a stator rotatably supporting a rotor, the rotor includes a stacked rotor laminations forming a rotor core with cavities having magnets arranged in the cavities through at least two adjacent rotor laminations and parallel to a rotor central axis, each lamination including an outer edge having grooves or scallops arranged asymmetrically about the circumference to reduce torque ripple. At least one groove or scallop may be arranged along a q-axis and at least one groove or scallop may be arranged between a q-axis and a d-axis of the rotor core. The laminations may be substantially identical with a first group of laminations flipped or rotated about a diametric axis relative to a second group of laminations. An electrified vehicle includes an electric machine powered by a traction battery, the electric machine having a rotor core with stacked rotor laminations having a scalloped outer edge.

Abstract: A multi-phase electric machine for an electrified vehicle includes a stator having multiple slots for accommodating windings. The slots extend radially between the inner circumference and the outer circumference of the stator and include open slots and closed slots arranged such that the windings of each phase occupy at least one open slot and at least one closed slot. A method for reducing torque ripple in a multi-phase electric machine includes winding a conductor through a stator having open slots and closed slots wherein each phase winding passes through at least one open slot and one closed slot.