Abstract: The present disclosure relates generally to a collector ring assembly for use in a rotor comprising a collector (or slip) ring body and a shaft in which the collector ring body and shaft each have mating features so that the collector ring body may be lockably attached to the shaft.

Abstract: A motor includes a rotor, a stator, and first and second bus bar disposed on one side in an axial direction of the stator. The stator includes a winding portion including conductor connection bodies in which conductors are connected in series and a stator core having slots through which the conductor connection body passes. The winding portion includes a coil end located on one side in the axial direction of the stator core. The conductor connection body includes first and second ends located at an outermost circumference in the radial direction of the coil end. The first bus bar is connected to the first end. The second bus bar is connected to the second end. The first bus bar is located on one side in the axial direction of the coil end. The second bus bar is located on the radial outside of the coil end.

Abstract: A motor armature includes a laminated body including a stack of magnetic bodies each having an annular and plate shape, an extended body that opposes an opposing peripheral surface that is at least one of an inner peripheral surface and an outer peripheral surface of the laminated body and extends along a stacking direction of the magnetic bodies, and a holder stacked on the laminated body in the stacking direction to hold the laminated body. The holder includes a plate portion that extends along the laminated body and has higher rigidity than the magnetic bodies, and a sleeve portion that extends in contact with the extended body.

Abstract: An electric motor may include a stator assembly comprising a stator housing, and one or more rotors coupled to the stator by a rotor shaft assembly. The stator housing may include a cooling structure that has a plurality of cooling body portions and a plurality of cooling conduits defined by the plurality of cooling body portions. A method of forming a stator housing for an electric machine may include additively manufacturing a stator housing that includes a cooling structure defining a fluid domain, coupling a working fluid source to the stator housing and introducing a working fluid into the fluid domain defined by the cooling structure, and sealing the cooling structure with the working fluid contained within the fluid domain of the cooling structure.

Abstract: The present invention may provide a motor including a shaft, a rotor coupled to the shaft, a stator disposed to correspond to the rotor, and a busbar disposed above the stator, wherein the stator includes a stator core and coils, the busbar includes a busbar body and a plurality of terminals disposed on the busbar body, the terminals include terminal bodies, first protrusions extending from end portions of the terminal bodies and connected to end portions of the coils, and second protrusions branched off from the first protrusions and connected to power terminals, and the plurality of second protrusions are disposed at the same position in radial and vertical directions of the busbar and disposed at equal intervals in a circumferential direction of the busbar.

Abstract: The disclosure relates to an electric machine and an assembling method for an electric machine. The electric machine includes: a shaft assembly including a first shaft, a second shaft coaxially disposed within an inner circumference of the first shaft, and a bearing disposed between the first shaft and the second shaft; a first revolving body coaxially connected to the first shaft, wherein the first revolving body includes an annular first adapter bracket, and a tubular structural portion extending in an axial direction is disposed at an inner circumference of the first adapter bracket; a second revolving body coaxially connected to the second shaft and disposed around an outer circumference of the first revolving body; and a guiding assembly disposed between the tubular structural portion and the first shaft to restrict a movement of the first revolving body relative to the first shaft in a circumferential direction and a radial direction.

Abstract: Disclosed herein are triboelectric nanogenerators (TENGs). Such TENGs comprise at least one tribolectric (TE) layer comprising two surfaces relative movement between which generates a TE charge, and a circuit. The circuit comprises a switch, a sensor, and a load. The switch has an open condition in which the TE charge accumulates (the accumulated TE charge), and a closed condition in which the accumulated TE charge discharges between the two surfaces across the load, the sensor determining a time constant (?) of discharge of the accumulated TE charge across the load.

Abstract: In accordance with an embodiment, an omnidirectional energy harvester device includes: a harvesting member including an electrode pad having a first electrode disposed on an upper surface of the electrode pad, and a friction pad spaced apart from the electrode pad and having a second electrode disposed on an upper surface of the friction pad; and a vortex-induced vibration column fixedly coupled to the harvesting member at a lower surface of the vortex-induced vibration column. The vortex-induced vibration column is configured to generate vibration by an external force at an upper portion of the vortex-induced vibration column, wherein the first electrode disposed on the electrode pad and the second electrode disposed on the friction pad are electrically connected.

Abstract: A stator assembly, a motor, a compressor and a refrigeration device are provided. The stator assembly has a store core, tooth parts, and windings. The tooth parts are arranged on an inside wall of the stator core and distributed in a circumferential direction of the stator core. Grooves are defined between every two adjacent tooth parts. The tooth parts have a first tooth. The windings are arranged on the tooth parts by being initially wound on the first tooth and, subsequently passing through the grooves on both sides of the first tooth when being wound on other tooth parts.

Abstract: An active magnetic bearing apparatus for supporting a rotor of a rotary machine comprises an axial magnetic bearing unit and a radial magnetic bearing unit mounted directly to one another. One of the axial magnetic bearing unit and the radial magnetic bearing unit is mounted to a support for attachment to a housing of the rotary machine.

Abstract: A vibration generating device includes a housing, a vibrator including a magnet, and a resilient member between the housing and the vibrator. The vibration generating device includes a coil configured to generate a magnetic field that causes the vibrator to vibrate. The vibration generating device includes a bracket including a coil-mounting portion on which the coil is mounted. The housing includes bracket supports provided at ends of two opposing side surfaces among the four side surfaces of the housing, the ends being situated opposite ends, of the two opposing side surfaces, to which the bottom of the housing is connected. The bracket includes connection portions bonded to the respective bracket supports. The bracket supports of the housing and the connection portions of the bracket are connected together in a state in which the bracket is inserted into a space of the housing.

Abstract: A triboelectric generator is disclosed. The triboelectric generator according to an embodiment of the present disclosure includes a flexible electrode part comprising a first and a second dielectric layer, and at least one metal layer; and a fixed electrode part spaced apart from both sides of the flexible electrode part, and comprising a first and a second electrode connected to each other, wherein the flexible electrode part generates triboelectrification based on contact and non-contact by a fluid flow, and an electric charge moves through the metal layer, thereby effectively moving electric charges generated by triboelectrification, and increasing the friction frequency to enhance power generation efficiency.

Abstract: An oscillatory actuator 1 includes a cylindrical case 2, an electromagnetic driver 3, a mover 4, a first damper 40a, and an inner guide 6a. The electromagnetic driver 3 is provided inside the case 2. The mover 4 is enabled to oscillate through driving by the electromagnetic driver 3. The first damper 40a has a plurality of arms 52a supporting the mover 4 from an inner surface of the case 2. The inner guide 6a is provided on the inner surface of the case 2 and restricts movement of the first damper 40a beyond a predetermined range. The inner guide 6a is located further toward a center of the case 2 than the first damper 40a in a direction of an oscillation axis ? of the mover 4.

Abstract: A stator structure of a vehicle motor includes a stator core assembly and a plurality of coil assemblies composed of flat wires. The stator core assembly includes an annular portion and a plurality of tooth portions. The tooth portions extend from the annular portion in a radial direction toward a center of the stator core assembly. Each coil assembly is configured around a corresponding tooth portion. Each coil assembly includes a first flat wire and a plurality of second flat wires that are electrically connected in parallel. The first flat wire is radially stacked and wound around the corresponding tooth portion. The second flat wires are arranged radially adjacent to the first flat wire and are electrically connected in series to the first flat wire. The second flat wires are alternately stacked and radially wound around the corresponding tooth portion.

Abstract: An electrical rotating machine provides an integrated capacitive encoder for control of the stator field and enabling any of reduced size, reduced rotational inertia, and lower cost. The same structure may also support capacitive plates for capacitive power transfer to the rotor.

Abstract: A magnetic geared motor includes a stator including a plurality of teeth that produce a magnetomotive force, a first rotor that rotates by the magnetomotive force of the stator, and a second rotor that, in response to rotation of the first rotor, rotates at a lower speed than the first rotor. The first rotor, the second rotor, and the stator are disposed coaxial to each other, and a plurality of magnets of different polarities are disposed in respective slot openings present between each two adjacent teeth.

Abstract: An electric machine (1) for driving a motor vehicle includes a stator (2) having at least one winding overhang (9, 10). Cooling fluid is flowable in the area of the at least one winding overhang (9, 10) to receive heat from the at least one winding overhang (9, 10). Air is flowable in the area of the at least one winding overhang (9, 10) to receive heat from the cooling fluid.

Abstract: An embodiment relates to a motor which comprises: a housing; a cover disposed to cover the housing; a stator disposed in the housing; a rotor disposed inside the stator; a shaft disposed in the center of the rotor; a sensing magnet disposed at the end of the shaft; and a circuit board including a sensor for sensing the sensing magnet, wherein the sensor is disposed inside a hole formed through the cover. Therefore, in the motor, a hole is formed through the cover disposed to cover an opening of the housing and a sensor is disposed inside the hole, so that a size of an axis direction of the motor can be reduced.

Abstract: In a driving system, first and second inverters are connected to a driving motor, one end of a stator winding through which 3-phase current flows is connected to an output line of the first inverter, and the other end of the stator winding is connected to an output line of the second inverter. A winding pattern of the driving motor includes: coils wound in slots defined in the stator and to which 3-phase current is applied; coils wound on innermost and outermost sides based on a direction toward a rotating shaft of the driving motor in the slots, and being energized by different AC phases; and coils disposed between a first coil located on the outermost side and a second coil located on the innermost side, and being energized by the same AC phases as those of the first and second coils.

Abstract: Provided is a rotating electric machine. This rotating electric machine includes a stator and a rotor, and the rotor includes: a rotor core having formed therein a magnet insertion hole group; and a permanent magnet group. In the rotor core, a first magnetic slit and a second magnetic slit are formed. In the second magnetic slit, a first magnet magnetic flux guide path connecting a first q-axis magnetic path and a second q-axis magnetic path is arranged. When an angle between a straight line passing through a first intersecting point and a radial center point and a straight line passing through a second intersecting point and the radial center point is set as ?1, the number of pole pairs is set as P, a natural number is set as m1, and n1 is set as a natural number smaller than m1, the following expression: ?1=2?×n1÷{P×(2m1?1)} [rad] is satisfied.