Abstract: A permanent magnet electric motor includes a shaft extending along a longitudinal axis and a rotor mounted on the shaft. The rotor is rotatable concomitantly with the shaft about the longitudinal axis, the rotor defines an innermost rotor edge. The innermost rotor edge is sized to receive the shaft. The permanent magnet electric motor further includes a stator. The shaft defines a jacket configured to receive a coolant. The jacket is disposed about the longitudinal axis. The jacket is elongated in a first direction. The first direction is parallel to the longitudinal axis. The rotor defines a plurality of longitudinal channels. Each of the plurality of longitudinal channel is elongated along the first direction, and each of the plurality of longitudinal channels is in fluid communication with the jacket to allow fluid flow between the jacket and the plurality of the longitudinal channels.

Abstract: A system and method for monitoring temperature and detecting a temperature rise of a rotating electric machine with high accuracy. A temperature monitoring system for a rotating electric machine includes: sensor data storage that stores values measured by an in-coil temperature sensor and a physical quantity sensor in the rotating electric machine; an in-machine temperature predictor that predicts a temperature by use of the value measured by the physical quantity sensor; a strand temperature calculator that calculates a relationship between a temperature of the strand and a temperature measured by the in-coil temperature sensor, based on the predicted temperature; and a strand temperature predictor that predicts a temperature of the strand from the value measured by the in-coil temperature sensor, and from the relationship between a temperature of the strand and a temperature measured by the in-coil temperature sensor calculated by the strand temperature calculator.

Abstract: A motor includes a rotor assembly and a stator. The rotor assembly includes a rotatable shaft extending in an axial direction, a rotor core coupled to the rotatable shaft and having a plurality of holes penetrating through the rotor core in the axial direction, a first end ring coupled to one end of the rotor core and configured to guide oil supplied to the rotor assembly into the plurality of holes, and a second end ring coupled to the opposite end of the rotor core and configured to guide oil passing through the plurality of holes in a radial direction.

Abstract: This invention provides a brushless dc dynamo, which is characterized by using semiconductor switches to replace commutators used in conventional brush DC dynamo, wherein the periodically mechanical contact of the armature and different electrodes are replaced with static electronic switching array to periodically switch electrically without any mechanical contact switching between the armature and electrodes. Meanwhile, the armature can work as conventional mode to always maintain the distribution of the armature current such that the magnetic field of the rotator is perpendicular to the magnetic field of the stator during rotating, and the damage of switched contacts caused by mechanical contact of the armature and electrodes can be avoided.

Abstract: An electric motor, in particular for a motor vehicle, having a cylindrical motor housing and having a fastening flange, the motor housing having a housing shell which is open both on a first end side and on the opposite second end sides, the fastening flange being configured with a bearing seat, and the fastening flange being connected to the housing shell on the second end sides.

Abstract: Embodiments of the disclosure provide an axial flux motor and an electrical product. The motor includes a rotor which rotates with a central axis as a center, and a stator which is disposed opposite to the rotor in an axial direction and has a plurality of stator units, the plurality of stator units being disposed around the central axis. The stator unit includes a core unit formed by a core piece, and a coil unit formed by a wire wound and disposed around the core unit. A height of the core unit in the axial direction is less than or equal to a height of the coil unit in the axial direction. With the embodiments of the disclosure, the dependency between the coil and the core in design and manufacture can be reduced, and the degree of design freedom can be improved.

Abstract: Disclosed is a motor brake device comprising: a solenoid module disposed along the circumferential outer peripheral surface of an outer rotor-type motor; a first friction member coupled to one surface of a motor rotor along the direction of a rotary shaft of a motor; and a second friction member disposed along the outer peripheral surface of the rotor, and selectively coming in contact with or being spaced from the first friction member by the solenoid module.

Abstract: An electric motor (1) is provided, preferably an internal rotor motor, having a housing (3) which is enclosed on all sides, except for a bushing for a drive shaft (2). A stator (5) is arranged in the housing, and is connected to a wall (3a) of the housing (3) in a thermally-conductive manner, wherein, externally to the wall (3a), a plurality of projections (6) are provided, which are oriented essentially parallel to the drive shaft (2), and wherein, externally to the housing (3), a fan wheel (8) is arranged on the drive shaft (2), the vanes (8a) of which, upon a rotation of the drive shaft (2), considered longitudinally to said drive shaft (2), pass over at least one region, in which region the projections (6) are arranged, such that a cooling air stream (KLS) is generated along the projections (6).

Abstract: A rotor assembly for a permanent magnet electric motor defines an axis of rotation and includes a jacket member and a magnet member. The magnet member is received within the jacket member. The magnet member defines a central aperture with a first end and a second end. The axis of rotation extends through the first end and the second end. The rotor assembly further includes a shaft arrangement with a first shaft structure and a second shaft structure. The first shaft structure is received in the first end of the magnet member, and the second shaft structure is received in the second end of the magnet member. The first shaft structure and the second shaft structure are attached within the magnet member at an internal coupling. The shaft arrangement and the jacket member cooperate to compress the magnet member radially with respect to the axis of rotation.

Abstract: An armature core of a linear motor, the armature core including: a core body having a plurality of teeth parts around which a winding is wound, and consisting of laminated steel sheets; a block disposed inside of the core body; a fastening hole provided in the block, and through which a fastener is inserted; and a fastener insertion member having a fastener insertion hole, and arrangeable at the core body in a state in which outside of the core body and inside of the fastening hole are in communication via the fastener insertion hole, in which the core body is fixed to a fixing target via the block, by the fastener inserted in the fastener insertion hole being fastened to the block via the fastening hole, and the armature core has a seal structure which, in a state in which the fastener insertion member surrounds an opening part of the fastening hole, blocks passage of fluid from the opening part to outside of the fastener insertion member.

Abstract: The invention relates to a stator, an electric machine comprising the stator, a vehicle comprising the electric machine, and a method for producing the stator. The stator comprises a stator laminated core and a housing element. The stator laminated core comprises a plurality of layered stator laminations, wherein each stator lamination has a plurality of tooth portions, each formed radially inwardly at an angular position, and indentations radially outwardly at each of the angular positions, each of which indentations has an at least partially curved edge having two radially outwardly curved edge portions, which meet at a point of intersection and describe an arc of a circle segment. The housing element comprises a cylindrical inner volume, in which the stator laminated core is arranged, the indentations forming cooling channels.

Abstract: A stator of an electric machine has first and second hairpin winding terminals connected with a first electrical phase and extending axially away from end windings of the stator. A hairpin winding of a second electrical phase is located circumferentially between the first-phase terminals and spaces them from one another. A jumper has spaced-apart C-hooks oriented face-to-face relative to one another and wrapping around respective exposed ends of the first-phase hairpin winding terminals. The jumper forms a bridge spanning between the first-phase hairpin winding terminals and over the second-phase hairpin winding terminal. During manufacturing of the stator, the C-hooks are slid axially downward onto respective non-insulated ends of the first-phase stator hairpin winding terminals. The C-hooks abut against and are axially positioned relative to the first-phase terminals by ledges defined by insulative coatings that cover portions of the first-phase hairpin winding terminals.

Abstract: A rotor for an electric machine of a vehicle. The rotor includes permanent magnets, receptions for the permanent magnets and deformation components. The permanent magnets are adapted to be deformed elastically and are arranged within the receptions, which are designed such that the permanent magnets may deform within the receptions. The deformation components are adapted to deform the permanent magnets such that at least one of a magnetic induction, a conductor length and a rotor radius is adjusted.

Abstract: In one embodiment, a high speed induction machine includes: a stator formed of a first plurality of laminations having a thickness of less than approximately 0.01 inch and a winding comprising a coil formed of Litz wire adapted about the stator; and a rotor adapted within the stator. The rotor may include: a rotor core formed of a second plurality of laminations having a second thickness of greater than approximately 0.10 inch and formed of high strength steel and sandwiched between a first end region including at least one first peripheral second lamination and a second end region including at least one second peripheral second lamination, the first end region having a first end ring retained by a first retaining ring adapted there around, the second end region having a second end ring retained by a second retaining ring adapted there around.

Abstract: A motor for an electric vehicle includes a motor housing for receiving a stator. A plurality of caps each have an outer rim and a washer portion defining a bolt receiving opening. The outer rim of each of the caps is press-fit into the receptacles in the motor housing. The caps are each attached to the stator by one of the bolts. The heads of the bolts clamp the cap to the stator to retain one end of the stator. The outer rim holds the cap in the motor housing while the washer portion flexes axially in response to thermal expansion and contraction of the motor housing. A method is disclosed for assembling the stator into the motor housing.

Abstract: An electrical machine includes a stator containing bearing plates and windings conducting electrical current and the rotor. The stator has windings conducting electric current embedded in a composite material and shaped into winding segments forming a ring segment of an angular span constituting a part of the full angle. The segments are inserted between the external and internal discs of the rotor. The magnetic poles are embedded and magnetised towards the axial direction of internal discs. The poles are separated from each other with a spacing made of a non-magnetic composite material of the internal and external discs structure. Each external and internal disc has an external reinforcing ring, made of a non-magnetic composite material reinforced with fibres of strength exceeding 1 GPa, formed by winding the fibres together with resin on the cylindrical surface of the discs. The external discs have a ring closing the magnetic circuit.

Abstract: A stator core of an electric motor is provided with a first core block and a second core block formed by laminating a plurality of large-diameter thin plates in a reversed arrangement with respect to each other causing outer circumferential edge burrs of the large-diameter thin plates to face each other, and with a small-diameter thin plate sandwiched between the first core block and the second core block, and having an outer diameter smaller than the cuter diameter of the large-diameter thin plate.

Abstract: A motor includes a rotating shaft extending along a central axis, a stator core arranged about the rotating shaft by being centered on the central axis, a housing arranged about the stator core in a circumferential direction and including an opening on one side in an axial direction, and a support covering the opening. A functional component is mounted on at least one side of the support in the axial direction. The motor further includes a fastener disposed in the axial direction to secure the support, the stator core, and the housing.

Abstract: An electric motor includes: a case; a stator including a stator core disposed inside the case and a stator coil wound around the stator core; a rotor including a rotating shaft and being configured to rotate with respect to the stator; and an oil spraying part that is configured to store oil in a lower part of the case, that includes an oil passage configured to guide the oil to an upper area of the case and an oil pump for pumping the oil, and that is configured to spray the oil to an inner heating part of the case. Accordingly, the oil can suppress occurrence of short-circuiting of an electric circuit and rapidly cool a heating part.

Abstract: A slide actuator according to the present invention includes: a fixed member; a movable member movable in a predetermined direction with respect to the fixed member; a wall portion of the fixed member disposed in a moving direction of the movable member; a plurality of balls interposed between the fixed member and the movable member and configured to movably support the movable member; a retainer configured to maintain a constant distance between the respective balls; a retainer spring connected between the wall portion and the retainer; and a movable portion spring connected between the movable member and the wall portion, in which the retainer spring is disposed so as to suppress a displacement of the retainer in the moving direction, and the movable portion spring is disposed so as to suppress a displacement of the movable member in the moving direction.