Abstract: Embodiments involve rotors for axial flux induction rotating electric machines that use a soft magnetic composite for the rotor core. A first embodiment is directed to a rotor for a rotating electrical machine that transmits magnetic flux parallel to a shaft of the rotor. The rotor includes a rotor winding and a plurality of cores. The rotor winding consists of a solid piece of conductive material that comprises a plurality of cavities. Each core is placed in a respective cavity and comprises a highly resistive isotropic ferromagnetic powder.

Abstract: The present invention relates to a slip ring, a motor, and a vehicle having same, the slip ring comprising: a cylindrical slip ring body; a plurality of blades formed protruding in the lengthwise direction of the slip ring body on an end portion of the slip ring body; and a brush contacting part disposed on the outer circumferential surface of the slip ring body, wherein the slip ring body and the blades are integrally formed. Accordingly, the motor, by means of the rotation of the blades, can dissipate frictional heat generated from friction between a brush and the slip ring and thus reduce the effects of heat, and can also guide and disperse airborne dust generated from friction between the brush and the slip ring to the outside.

Abstract: A cooling system includes a rotary electric machine, a pump that pumps coolant, a first coolant flow path that guides coolant to the rotary electric machine, a second coolant flow path branching off from the first coolant flow path, a pressure regulation valve provided in the second coolant flow path, a first orifice provided at downstream than the pressure regulation valve in the second coolant flow path in coolant flow direction, a third coolant flow path branching off from between the pressure regulation valve and the first orifice in the second coolant flow path and joining to a downstream than the branching position of the second coolant flow path in the first coolant flow path in coolant flow direction, and a switching valve provided in the third coolant flow path and that allows coolant flow to the first coolant flow path when experiencing a pressure of a threshold or more.

Abstract: A method and apparatus for cooling a rotor assembly for an inside-out electric machine includes an annular rotor core defining a set of rotor posts, the core rotatable about an axis of rotation, a set of windings wound around the respective set of rotor posts, and a wedge disposed between adjacent sets of rotor windings.

Abstract: In order to provide a cooling structure of a stator of a rotating electrical machine that is capable of surely cooling a stator coil end of each unit coil, a cooling structure of a stator of a rotating electrical machine that conducts cooling of a stator coil end (42A) by a refrigerant is provided with an oil guide (52) including a refrigerant passage (521) that is disposed to be opposed to an axial end portion of the stator coil end (42A), the refrigerant flowing through the refrigerant passage (521); and a refrigerant discharging portion (523) that projects from the refrigerant passage (521) toward the stator coil end (42A) of each unit coil (42a) and discharges the refrigerant from a tip end thereof.

Abstract: A vibration generating apparatus includes a bracket coupled to a rectangular case to form an inner space, a stator including a circuit board coupled to an upper surface of the bracket and a coil connected to the circuit board, a vibrator including a permanent magnet arranged on an exterior of the coil and a weighted body coupled to an outer circumferential surface of the permanent magnet, and an elastic member connecting the stator and the vibrator and elastically supporting the vibrator. The weighted body is polyhedral, and the vibrator moves up-and-down.

Abstract: An electromagnetic motor/generator comprising a flux assembly having at least one coil and at least one magnetic field source separated by a first gap and a second gap and an interference drum which is movable relative to the at least one coil and to the at least one magnetic field source to alternatively position at least one first magnetically permeable section and at least one second magnetically permeable section inside the first and second gaps.

Abstract: Described herein are fractional slot electric motors with compact crowns. A motor comprises multiple coil elements protruding through a stator core and forming electrical connections with each other and/or with a lead assembly. The lead assembly comprises phase busbars connected to selected coil elements and comprising terminals for connecting to an external power supply. The lead assembly also comprises neutral busbars, with no external connections and internally connected to other coil elements. Each coil element has a rectangular cross-sectional profile to maximize the slot-fill-ratio of the motor, Each coil element is electrically coupled to two other components. For example, each looped coil element is coupled to two other coil elements at a stator side, opposite the lead assembly. Each extended coil element is coupled to another coil element at that same side and coupled to another coil element or a busbar at the lead assembly side.

Abstract: A drive device includes a hollow hub rotatable about hub shafts extending parallel to a center axis, a motor housed in the hub and fixed to the hub shafts, and a speed reducer connected to the motor and the hub. The motor includes a rotor including a motor shaft extending parallel to the hub shafts, a stator disposed outside the rotor in a radial direction, and a motor housing holding the stator therein. The drive device includes thermal grease thermally connecting the hub and the motor housing to each other.

Abstract: An alternating hybrid excitation assembly and its application to a rotary motor, linear motor and transformer, including: an even number of iron cores and a plurality of magnetic isolation layers arranged between, forming a loop, each core includes one or two notches wherein permanent magnets are inlaid, the two magnetic pole faces are attached to two opposite sides of the notch of the corresponding core, and a gap is reserved between one side face of each magnet and the side edge of the notch of the core; the magnets have opposite magnetic polarity directions, and an excitation coil surrounds the cores. A permanent magnetic potential and an excitation magnetic potential are superimposed to form an alternating hybrid excitation magnetic field, and thus electromagnetic energy efficiency is improved. Further, embodiments of the alternating hybrid excitation assembly applied to the rotary motor, the linear motor and the transformer.

Abstract: A rotor of an electric motor includes a rotating shaft, a rotor core and a commutator fixed to the rotating shaft, and a first sleeve, a second sleeve and a third sleeve arranged around the rotating shaft. The first sleeve is located on a side of the rotor core away from the commutator and abuts against the rotor core, the second sleeve is located between the rotor core and the commutator, and the third sleeve is located on a side of the commutator away from the rotor core.

Abstract: A motor includes a rotary shaft having at least one spray hole for spraying a cooling fluid, a rotor installed on the rotary shaft, and a stator surrounding an outer circumference of the rotor, wherein the rotor includes a plurality of rotor blocks arranged on an outer circumference of the rotary shaft. Each of the rotor blocks may include a magnet installed at a rotor core and a cooling guide may be disposed between a pair of the plurality of rotor blocks and form a spray flow path for guiding a cooling fluid that has passed through the spray hole to be sprayed in a direction toward an inner circumference of the stator.

Abstract: A motor cooling device includes an annular member that rotates with a shaft of a motor, and an oil catch unit that has a groove-shaped cross-section and is disposed along an outer circumference of the annular member, with a groove of the oil catch unit facing an outer circumferential surface of the annular member. The oil catch unit extends toward a backward side in a rotation direction of the annular member so as to form an arc shape, and includes a closure plate that covers the groove at an end in a circumferential direction located on a forward side in the rotation direction, and an oil spout hole that is bored near the closure plate. The annular member includes a protrusion that is provided on the outer circumferential surface of the annular member and that moves toward the closure plate when the annular member rotates with the shaft.

Abstract: The invention relates to an aircraft turbine having counter-rotating propellers and a primary drive, the noise development of which is significantly reduced with respect to aircraft turbines which have a primary drive based on the internal combustion principle. The invention relates to an aircraft turbine having counter-rotating propellers and a primary drive, the primary drive of which is based on the electric drive principle.

Abstract: A brushless winding field rotational electric machine includes: a stator, held to a case, including an alternating-current coil configured to generate a rotation magnetic field by alternating current; a field core, held to the case, including a field coil to be excited by direct current; and a rotor on an outer periphery of a rotation member and rotatably held about a rotational axis relative to the stator and field coil. The field coil includes a plurality of coil winding layers stacked in a radial direction of the rotational axis. A cross-sectional area along an axial direction of the rotational axis, of a coil winding layer closest to the rotational axis in the radial direction of the rotational axis is smaller than a cross-sectional area along the axial direction of the rotational axis, of a coil winding layer farthest from the rotational axis in the radial direction of the rotational axis.

Abstract: Described herein are braking mechanisms and related methods of using eddy current interactions to resist relative movement between members, the magnetic flux about an eddy current region being modified beyond an inherent drag effect resulting from a simple magnetic pole arrangement.

Abstract: An actuator may include a movable body; a support body; a connecting body disposed in contact with both the movable body and the support body; and a magnetic driving circuit including a coil provided in a first member, and a permanent magnet provided in a second member. The magnetic driving circuit may vibrate the movable body. The first member may include a coil holder and a power supply board. Both end portions of the power supply board may fit, from a second side in the first direction, inside of a pair of slits extending to a first side in the first direction. The power supply board may fit in the pair of slits to a depth in which the power supply board is in contact with a contact portion of the coil holder. The coil wire may be slackened in a section between the coil and a connecting position.

Abstract: A power generator for use in a bore, the power generator comprising at least one drivable member; and at least one generation apparatus; the generation apparatus comprising at least one generator magnet for producing a magnetic field; and at least one electrically conductive member located or locatable within the magnetic field; wherein the drivable member is drivable by fluid flowing in the bore so as to produce relative motion of the at least one magnet and the at least one electrically conductive member in order to induce a current in the at least one electrically conductive member.

Abstract: A motor driving device includes: a printed circuit board; a surface mounted component group of multiple surface mounted components surface-mounted on a printed surface of the printed circuit board; a heat-generating component group of multiple heat-generating components that generate an amount of heat equal to or larger than a predetermined amount, the heat-generating component group being provided on the printed surface side of the printed circuit board; a fan configured to blow air to the heat-generating component group to thereby cool the heat-generating components; and a cover configured to block flow of air blown by the fan so that the air blown by the fan will not flow to the surface mounted components.

Abstract: In a motor according to an aspect of the invention, a brake includes a first clamp and a second clamp, a member to be clamped disposed between the first clamp and the second clamp, a first fixing member configured to fix the member to be clamped to a shaft, and a driving section configured to bring the first clamp and the second clamp into contact with the member to be clamped. The first clamp includes a first contact section. The second clamp includes a second contact section. A first housing hole is provided in a housing. The driving section includes a power cable drawn out to the outside of the housing via the first housing hole. The first housing hole overlaps the first contact section, the second contact section, the member to be clamped, and the first fixing member in a plan view from a first radial direction.