Abstract: An axial field rotary energy device are disclosed. For example, the device can include a printed circuit board (PCB) stator having PCB panels. Each PCB panel can include conductive layers. Selected ones of the conductive layers are coupled to plated vias that extend from one major surface of the PCB stator to an opposite major surface of the PCB stator. In addition, each major surface of the PCB stator can have a layer of a dielectric material that completely covers ends of the plated vias.

Abstract: Systems, methods, and devices for electrical power generation are disclosed. A device includes a radioactive source that emits radiation including at least one of: electrically charged particles; electrically neutral particles; or electromagnetic radiation; an ion media positioned adjacent to the radioactive source, wherein the ion media comprises a material that releases electrons in response to exposure to radiation; a set of two or more electrodes configured to: establish an electric field across the ion media; capture electrons released by the ion media in response to exposure to radiation emitted by the radioactive source; and generate electric current from the captured electrons. The device includes a supplemental power supply electrically connected to the set of two or more electrodes. The device includes an electrical load electrically connected to the set of two or more electrodes.

Abstract: In the brushless motor disposed in a hammer drill, while a stator core of a stator is formed by joining a plurality of divided cores divided in a circumferential direction, varnishes are applied over a coil and joining portions between the divided cores.

Abstract: An electric actuator includes a housing, an electric driving unit, an selector member being rotatable about a rotation axis and moving in a direction of the rotation axis, a position holding member and detection object provided in the selector member, a detector, an engagement groove provided on a cooperation surface inside the housing, and a biasing member biasing the selector member in the direction of the rotation axis to make the position holding member approach the cooperation surface. The engagement groove is formed so that the detection object is positioned in one of a detectable area and an undetectable area when the position holding member is engaged with the engagement groove, and the detector is configured to switch between supply and cutoff of power to the electric driving unit in accordance with whether or not the detection object is detected.

Abstract: An electrical machine includes an interconnection assembly that creates contact for a stator of the electrical machine, a busbar that creates contact for the interconnection assembly, a measurement printed circuit board that is arranged perpendicularly to an axis of rotation of the electrical machine, on a side of the interconnection assembly that is averted from the stator, wherein a field sensor is arranged on the measurement printed circuit board, and a flux concentrator that engages around the busbar and the field sensor.

Abstract: An electric motor assembly includes a stator and a rotor configured to rotate relative to the stator. The stator includes a stator core including a yoke that has a ring shape and a plurality of teeth radially coupled to an inner surface of the yoke, a stator coil that is wound around the stator core, and an insulator disposed between the stator core and the stator coil. The insulator includes a yoke insulator that is coupled to the yoke with a first coupling tolerance defined between the yoke insulator and the plurality of tooth insulators, and a plurality of tooth insulators that are coupled to the plurality of teeth, respectively, with a second coupling tolerance defined between the yoke and the plurality of teeth. The first coupling tolerance is less than the second coupling tolerance.

Abstract: A system and a method for use of electric motors in fracturing operations are disclosed. The system includes an electric motor, a turbine generator, an encoderless vector control subsystem, and at least one pump. The turbine generator is adapted to generate electric power for the system. The encoderless vector control subsystem is coupled between the turbine generator and the electric motor to control the electric motor using determined parameters that are based in part on vibration induced in a feature associated with the turbine generator. The at least one pump is adapted to receive torque input from the electric motor.

Abstract: An electric motor is provided and includes inner and outer rotors, a stator supportive of back iron radially interposed between the inner and outer rotors and a winding structure. The winding structure includes first phase coils radially interposed between the inner rotor and a first side of the back iron, the first phase coils extending axially along the first side of the back iron, second phase coils radially interposed between a second side of the back iron and the outer rotor, the second phase coils extending axially along the second side of the back iron and end windings respectively extending radially between corresponding ones of the first and second phase coils.

Abstract: A power conversion device comprises a power conversion circuit, and a multilayer substrate that includes the power conversion circuit, and has a wiring pattern. The wiring pattern of the multilayer substrate includes a power supply pattern, and a ground pattern. The multilayer substrate includes a first layer and a second layer. The power supply pattern includes a first layer power supply pattern portion in the first layer. The ground pattern includes a second layer ground pattern portion in the second layer. The first layer power supply pattern portion and the second layer ground pattern portion overlap with each other at least in part in a direction perpendicular to a plate surface of the multilayer substrate.

Abstract: A stator for an electric motor is described. An example stator includes a stator core having teeth that are radially arranged about a common central axis of the stator and located in a spaced apart manner from one another. Each tooth has an inward portion and an outward portion. The example stator further includes an electrically transmissive coil of wire that is wound contiguously upon the inward portions of at least a subset of teeth from the plurality of teeth. The stator also includes wedge members that are radially arranged about the common central axis and located intermittently with the plurality of teeth such that each wedge member abuts with the outward portions of adjacently located teeth.

Abstract: An element-side connection terminal (40) extending from a power conversion circuit unit (16) includes a first connection terminal portion (40A) that extends in a direction intersecting a direction of extension of a counterpart-side connection terminal (38); and a second connection terminal portion (40B) that is bent at a point before the first connection terminal portion (40A) reaches the counterpart-side connection terminal (38) in a direction to intersect the direction of extension of the counterpart-side connection terminal (38) such that the second connection terminal portion (40B) is provided with elasticity and is in an elastic contact with the counterpart-side connection terminal (38) at an angle. A tip end side (38T) of the counterpart-side connection terminal (38) and a tip end side (40T) of the second connection terminal portion (40B) are electrically joined.

Abstract: To provide a brushless motor with a simple configuration, which has accomplished size reduction. An inner rotor brushless motor having a rotor in a center of a cylindrical stator includes: three bus bars on one end side of the stator in an axial direction thereof, the bus bars connecting three phase coils provided to the stator on a phase-by-phase basis; a bottomed tubular connector portion adjacent to a housing that houses the stator and the rotor; a plurality of connector terminals fixed, penetrating a bottom portion of the connector portion, the plurality of connector terminals being exposed to an internal space of the connector portion; and a board stretching from the one end side of the stator in the axial direction to the bottom portion side of the connector portion, the board being configured to electrically connect an end of each of the bus bars and the penetrating connector terminal.

Abstract: There is provided an electric compressor in which the connection strength between an inverter circuit section and an electrical circuit section connected thereto by a connection terminal is improved. An inverter circuit section (3) includes an inverter control board (17) and a resin-molded sleeve assembly (18). In the sleeve assembly, a sleeve (32) and a terminal connection portion (23) are integrally resin-molded in a state in which a screw groove portion is protruded. The inverter control board (17) and a filter side connection terminal (71) of a filter circuit section (4) are fastened together to the terminal connection portion with a nut (92) screwed into the screw groove portion, whereby the inverter control board 17 and the filter circuit section 4 are electrically connected.

Abstract: An electric machine has a plurality of phases. A winding is associated with each phase. An interconnection arrangement includes an annular carrier element with a plurality of axial cutouts, each for passage of a portion of a winding and a plurality of concentrically arranged, hollow-cylindrical switching rings. Each switching ring is adapted to contact a winding. The carrier element and the switching rings are adapted to radially positively engage one inside the other in an axial contact zone.

Abstract: A motor includes a rotating portion rotatable about a center axis that extends vertically and a stationary portion that rotatably supports the rotating portion. The stationary portion includes a stator facing at least a part of the rotating portion in a radial direction, a circuit board disposed axially below the stator, and a resin portion covering at least a part of the stator, and the circuit board. The stator includes a plurality of coils disposed in a circumferential direction. The circuit board includes an axially upper surface mounted with an electric element that is disposed at least at one of positions including a position between two coils of the plurality of coils, adjacent to each other in the circumference direction, and a position below the coil.

Abstract: A motor assembly for an e-boosting device is disclosed. The motor assembly includes a motor case and a motor cavity within the motor case. The motor case is configured to receive an electric motor that is configured to drivingly rotate a rotor about an axis of rotation. The motor assembly also includes a through-hole defined by the motor case. The motor case configured to be received in an outer housing to cooperatively define a coolant jacket with the outer housing. The coolant jacket includes a fluid flow path defined partly by the through-hole. Methods of manufacturing the motor assembly are also disclosed.

Abstract: An electric motor has a stator and a rotor for rotation relative to the stator. The stator has a plurality of stator windings distributed along the circumference of the stator. Each stator winding is connected to a respective end terminal. Driver circuitry is coupled to the plurality of stator windings for creating a rotating magnetic field for driving the rotor. The driver circuitry has one driver module per stator winding. Each driver module is mounted close to its respective stator winding. Each driver module is connected to the respective end terminal of its respective stator winding without a parasitic impedance of any significance being present in between said driver module and said stator winding.

Abstract: A drive assembly having an electric motor, having a stator housing, a stator accommodated therein and having at least one winding, a stator insulation which has a lower part and an upper part, wherein the lower part rests against at least one bearing surface in the stator housing, terminal contacts for the winding, wherein the terminal contacts are held in a contact carrier, which is provided on the lower part of the stator insulation, and a printed circuit board, which rests on at least one supporting surface in the stator housing, wherein the terminal contacts are in contact with associated conductor tracks of the printed circuit board.

Abstract: Systems are provided for an electric motor housing. In one example, a system comprising a phase connection enclosure comprising a bus bar assembly sealed between a motor lead and a plurality of phase cable connections. The phase connection enclosure is integrally arranged within a cooling jacket of the electric motor housing.

Abstract: A motor according to an embodiment includes a stator and a plurality of terminals. The stator includes a tubular shape, and includes a lead wire. The stator is provided with the plurality of terminals. The plurality of terminals are arranged in a circumferential direction. Furthermore, the plurality of terminals are integrally formed with a member including electrical conductivity, and a recessed portion is formed at an outer peripheral wall portion of the member including electrical conductivity in a rotational axis direction. Moreover, the lead wire passes through the recessed portion and is wound around an inner peripheral portion and an outer peripheral portion of the stator.