Abstract: A drive circuit is provided, which is used for driving an electrostatic film actuator. The drive circuit includes an input end, an isolation capacitor and a diode. The input end is used for receiving an input signal. The isolation capacitor includes a first end and a second end. The first end is electrically connected to the input end, and the second end is electrically connected to the electrostatic film actuator. The diode is connected between a working voltage end and the second end in a forward-bias direction, and an output signal is generated at the second end to drive the electrostatic film actuator.

Abstract: A rotor position sensor for a motor vehicle for sensing the rotational position of a rotor of an electric motor includes a sensor housing, in which the components of the rotor position sensor are accommodated. At least part of the sensor housing forms a cover for closing a motor housing of the electric motor.

Abstract: An electric machine assembly includes a rotor core. The rotor core includes a plurality of winding poles extending between a first axial face and a second axial face of the rotor core. A clench lock slot is defined in the first axial face. The clench lock slot includes a first channel section having a first channel width, a second channel section having a width equal to the first channel width, and a converging-diverging section connecting between the first channel section and the second channel section. A first end of the converging-diverging section connects to the first channel section and has a width equal to the first channel width. A second end of the converging-diverging section connects to the second channel section and has a width equal to the first channel width. A clench point of the converging-diverging section is defined where the converging-diverging section is narrowest.

Abstract: A vibration-driven energy harvesting element includes fixed electrodes that are fixed to a base part, a movable electrode that is movable with respect to the fixed electrodes, and an elastic support part that includes one end fixed to the base part and another end fixed to the movable electrode and elastically supports the movable electrode. The elastic support part of the vibration-driven energy harvesting element includes a plurality of elastic structures each of which has a linking portion, a first elastic portion, and a second elastic portion. The first elastic portion having one end fixed to the linking portion and another end fixed to the movable electrode and extending in a second direction orthogonal to a first direction in which the movable electrode vibrates. The second elastic portion having one end fixed to the linking portion and another end fixed to the base part and extending in the second direction.

Abstract: An electricity generator includes at least one chamber wherein the pressured solution and air mixture, which can be taken therein by means of at least one input opening, can be centrifuged; at least one first output opening provided for discharging of the solution, which can be separated from the air by means of centrifuging of the mixture on the chamber and which is brought to equal vapor pressure as the air vapor pressure; and at least one second output opening provided for discharging of the air separated from the solution which exists in the mixture. In order to enable electricity generation, the electricity generator further includes at least one magnet which can create magnetic field in the chamber, at least one first electrode positioned in the vicinity of the input opening, and at least one second electrode positioned in the vicinity of the first output opening.

Abstract: A stator for an electric actuator or motor, including: a solid body; a ferromagnetic core region between the layers of semiconductor material, electrically insulated from the layers of semiconductor material; a plurality of conductive through vias through the solid body; a first plurality of conductive strips, which extend parallel to one another above the core; and a second plurality of conductive strips, which extend parallel to one another above the core and opposite to the first plurality of conductive strips; wherein the first plurality of conductive strips, the plurality of conductive through vias, and the second plurality of conductive strips form a winding or coil of the stator.

Abstract: A rotary electric machine includes a stator and a rotor. The stator includes a stator core, coils, and a power line. The stator core includes slots. The coils are individually inserted in the slots and attached to the stator core. The power line couples a power source to the coils. Each coil includes projections and insertion portions. The projections are opposite ends of the corresponding coil and project from the stator core. The insertion portions are portions of the corresponding coil and inserted in the slots. The coils include general coils and power-line coils. The projections of each general coil serve as a first coupler and a second coupler. The projections of each power-line coil serve as a power-line coupler and a general coupler. The power-line coils and at least one of the general coils are same in length. The power-line coupler is coupled to the power line.

Abstract: The present disclosure relates to a rotor 10 for an axial flux motor 1. The rotor 10 comprises a rotor wheel 100, a plurality of permanent magnets 50 and a holding structure 60. The rotor wheel 100 comprises disk-shaped main body 110 and a plurality of arms 120. The disk-shaped main body 110 defines an inner circumference 111 and an outer circumference 114. The plurality of arms 120 protrude from the outer circumference 114 radially outwards to a respective arm tip 123. The plurality of arms 120 is circumferentially distributed on the outer circumference 114. The plurality of permanent magnets 50 is distributed circumferentially about the outer circumference 114 and arranged circumferentially between the plurality of arms 120. The holding structure 60 is attached to the rotor wheel 100 and to the plurality of permanent magnets 50 to hold the plurality of permanent magnets 50 in position.

Abstract: The present invention relates to a slotless motor comprising a rotor position sensing element. The motor has a rotor having a rotational axis and a plurality of coil windings arranged into an integer N number of distinct blocks, each block being arranged about the rotational axis and having a gap between each adjacent pair of blocks. The rotor position element has a sensor ring having a sensor fixed to the sensor ring and a sensor ring attachment extending from the sensor ring wherein the sensors are spaced around the rotational axis and wherein the rotor position sensing element is configured to hold the sensor ring relative to at least one of the blocks such that the sensor is held in a predetermined position.

Abstract: A static charge eliminator for neutralizing static electricity on an armature, such as a rotor or a stator of a rotating electrical machine. The static charge eliminator includes a first contact, a second contact, a third contact, and a drive unit. The drive unit works to move at least one of the first, second, and third contact and the armature to simultaneously achieve electrical contacts between the first contact and a core of the armature, between the second contact and a metallic section(s) of wire segments of a coil of the armature or power wires electrically connecting with the coil, and between the third contact and outer layers of portions of the wire segments contacting a coil end protruding outside an axial end of the core of the armature. A static charge elimination method is also provided.

Abstract: A nuclear battery module is adapted for a nuclear battery. The nuclear battery module includes a radioactive unit and at least one energy conversion unit. The radioactive unit includes a soft substrate and at least one radioactive layer disposed on the soft substrate. The at least one radioactive layer includes a ?-ray source. The at least one energy conversion unit includes a flexible carrier layer, an N-type semiconductor layer disposed on the flexible carrier layer, and a P-type semiconductor layer disposed on the N-type semiconductor layer opposite to the flexible carrier layer. The at least one energy conversion unit is disposed on the radioactive unit in a manner such that the flexible carrier layer is proximate to the radioactive unit.

Abstract: A power tool (1; 90) includes a motor (17) having a stator (18) and a rotor (19). The stator (18) includes front and rear insulators (21, 22) respectively disposed forward and rearward of a stator core (20) in an axial direction thereof. At least six coils (23) are respectively wound on the stator (18) such that the coils (23) are wound through the front and rear insulators (21, 22). Winding wires (23a) respectively electrically connect circumferentially-adjacent pairs of the coils (23). A short circuiting device (25) short circuits respective pairs of windings (23a) that are located diagonally or diametrically across from one another.

Abstract: Herein a hand-held electrically powered device (2) is disclosed. The hand-held device comprises a housing (4)), an electric motor (14), and a fan (18). The hand-held device (2) comprises a wall member (20) arranged inside the housing (4) and forming at least part of a wall (22) which delimits a first compartment (24) from a second compartment (26) within the housing (4). The wall member (20) forms an individual element. The wall member (20) is coupled to first and second housing elements. The wall member (20) comprises a through opening (42). The electric motor (14) extends from the first compartment (24) to the second compartment (26) via the through opening (42). The electric motor (14) is supported by the wall member (20).

Abstract: A rotor for a permanently energized electrical machine includes at least two rotor poles arranged next to one another in the circumferential direction; a rotor iron core; and a permanent magnet assembly embedded in the rotor iron core for generating a magnetic air-gap flux density, the assembly having at least one permanent magnet per rotor pole and the permanent magnet being divided into at least two permanent magnet parts. A crosspiece is arranged between the at least two permanent magnet parts of a permanent magnet the crosspiece separates two hollow spaces for receiving the permanent magnet parts, has magnetically conductive support sections for increasing a mechanical stiffness of the rotor iron core and for discharging external magnetic fluxes in the event of an active short circuit introduced into the electrical machine, and has magnetically insulating flux-blocking sections for reducing magnetic leakage fluxes.

Abstract: The present specification discloses a motor assembly. An embodiment of the motor assembly disclosed in the present specification may comprise: a motor housing in which a motor is received; a shaft which forms the rotation axis of the motor; a rotor which is coupled to the shaft; a plurality of cores and coils which are provided along the circumference of the rotor to form a flux path; and insulators which are coupled to the cores to insulate the cores from the coils, wherein each of the insulators may comprise an insulating portion which covers the outer surface of the corresponding core and a fixing portion which protrudes outward from the insulating portion in the radial direction of the rotor, and the fixing portion may be coupled to the inner circumferential surface of the motor housing.

Abstract: In a three-phase induction motor, each of coils of three phases has a first coil unit and a second coil unit placed in 180-degree symmetry, each of the coil units has a first coil and a second coil, the first coil is formed by winding a winding once in an electrical angle range of 180 degrees during a two-pole operation, the second coil is formed by winding the winding twice in a range of a center third when the first coil is equally divided into three parts in a circumferential direction, in such a manner that a current flows in a direction opposite to a direction of current flowing in the first coil.

Abstract: An electric generator includes a turbine wheel configured to receive process gas and rotate in response to expansion of the process gas flowing into an inlet of the turbine wheel. A rotor is coupled to the turbine wheel and can rotate with the turbine wheel in a stator. The electric generator generates a current upon rotation of the rotor within the stator. A power electronics system is electrically connected to an electrical output of the electric generator and receives alternating current from the electric generator. The electric generator includes a brake resistor assembly having an impedance that matches an impedance of the electric generator. A contactor is electrically connected the electrical output of the electric generator and is configured to connect the electric generator to the brake resistor assembly based on a fault condition.

Abstract: An electric work machine includes a motor, a driver, and a rotation sensor. The motor includes a stator, and a rotor of permanent-magnet type. The stator includes a cylindrical body, teeth, and coils. The rotation sensor is installed in an area of the stator close to the rotor than an area where the coils are disposed in a radial direction of the stator.

Abstract: A cooling system for a drive device with several electric machines, the cooling system including a hydraulic circuit for a coolant including a cooling part in a gearbox of the drive device for cooling the gearbox, and an air/coolant heat exchanger including cooling walls forming channels for circulating coolant for the cooling thereof, an air cooling circuit including a plurality of fans, rotationally coupled to the gearbox, a cooling part between the cooling walls of the air/liquid heat exchanger, wherein the air sucked in and propelled by the fans circulates by sweeping over the cooling walls in order to cool them.

Abstract: The present disclosure relates to a motor with bidirectional terminals. According to the present disclosure, as the brush terminals are installed on both the left and right sides of the upper surface of the brush card assembly, it is possible to prevent the assembly defects of the motor due to the erroneous assembly of the brush terminals.