Abstract: The present invention relates to a rotor of motor, and more particularly, to a 2-segment quasi-Halbach rotor of motor that includes a radial magnet and a circumferential magnet which are Halbach-arrayed and a back iron providing a flux to reduce a thickness of the magnet and acquire high air-gap flux density.

Abstract: This application relates to a frictional electricity generator increasing output transfer efficiency. In one aspect, the frictional electricity generator includes a housing and a power generation element which is arranged in the housing and in which a + position pole and a ? position pole are arranged according to the movement of a positive charge and a negative charge by friction. The + position pole and the ? position pole of the power generation element may be arranged at a distance of a predetermined angle on a plane so as to minimize energy loss due to mutual repulsion, and may be connected to each transmission path.

Abstract: The invention relates to a magnetic coupling element (100) with a magnetic bearing function. The magnetic coupling element (100) has a drive-side coupling magnet (109) arranged on a drive shaft (106), and also an output-side coupling magnet (115) arranged on an output shaft (112), the output-side coupling magnet (115) being magnetically coupled to the drive-side coupling magnet (109), and finally a bearing magnet ring (118) which is non-rotatably mounted with respect to the drive-side or output-side coupling magnet (109) or (115), a bearing magnet portion (133, 136) of the bearing magnet ring (118) having the same polarity as a coupling magnet portion (127, 130) opposite the bearing magnet portion (136).

Abstract: A connector portion includes a first system connector that holds a first power supply terminal and a first signal terminal and a second signal terminal that holds a second power supply terminal and a second system connector. An insertion/removal direction of the first system connector is the same as the insertion/removal direction of the second system connector. The first system connector and the second system connector are arranged close to each other such that the interval between the connectors is smaller than the width in a short length direction of both connectors. The first power supply terminal is arranged closer to the second system connector than the first signal terminals in a frontage of the first system connector. The second power supply terminal is arranged closer to the first system connector than the second signal terminal in a frontage of the second system connector.

Abstract: An electric winding assembly comprising a conductor core which includes at least a first end and a distal second end, an insulation layer overlying the conductor core, and a conductive shield layer overlying the insulation layer. The conductive shield layer further having a terminal end conductively connected with the conductive shield layer.

Abstract: A stator for a vehicle includes a body defining a central bore that is adapted to receive a rotor. The stator also includes a plurality of electrical conductors radially disposed on the body. Each of respective electrical conduction of the plurality of electrical conductors includes a corresponding magnetic core wound in a conductive wire. The stator also includes a wired frame that includes one or more conductive wires. Each of the one or more conductive wires includes a first end and a second end opposite the first end. Each respective first end of the one or more conductive wires is connected to corresponding terminals of the stator. Each respective second end of the one or more conductive wires is bent at an angle and adapted to mate with a controller.

Abstract: A recirculating linear generator comprises a motor, a pulley system, two series of coil structures each arranged coaxially, a positive lead, and a negative lead. The pulley system includes a driver pulley driven by the motor and a take-up pulley. A belt couples to the driver pulley and the take-up pulley, so when driven, the belt travels along the driver pulley and the take-up pulley rotates. A series of ferromagnetic couple to the belt. The belt and masses traverse through a center (i.e., an axis) of the first series and second series of coil structures, and the first series and second series of coil structures each comprise a single electrical path. The positive lead couples to positive ends of the first and second series of coil structures, and the negative lead couples to negative ends of the first and second series of coil structures.

Abstract: An electronic sensing apparatus and a method of producing the electronic sensing apparatus includes a triboelectric generator encapsulated between a bottom substrate and a top encapsulation layer, wherein the triboelectric generator is arranged to generate a triboelectric sensing signal in response to a deformation of the bottom substrate and/or the top encapsulation layer.

Abstract: A handpiece for a handheld surgical instrument having a motor and a heatsink is provided. The motor is within a motor housing and the heat sink is disposed around and thermally coupled with the motor housing. The handpiece is formed from a material having a first thermal conductivity and the heat sink has a second thermal conductivity that is greater in value than the first thermal conductivity of the material of the handpiece. The heat sink is configured to dissipate heat from the motor during operation of the motor to the handpiece.

Abstract: A drive device includes a fluid coupling and a rotary electrical machine. The fluid coupling includes an impeller and a turbine, and is configured such that a torque is inputted thereto from one axial side and outputted therefrom to another axial side. The rotary electrical machine includes a first stator and a rotor. The first stator is disposed in a non-rotatable manner. The rotor is disposed to be rotated about a rotational axis of the fluid coupling. The first stator includes a first stator core, first and second coil ends. The first coil end protrudes from the first stator core in an axial direction. The second coil end protrudes from the first stator core to an opposite side of the first coil end in the axial direction. The first coil end is bent radially outward and located in part radially outside an outer peripheral surface of the first stator core.

Abstract: There is provided a power tool including a housing, a brushless motor, a power supply circuit, and a fan. The housing is formed with an inlet hole and an exhaust hole. The brushless motor is supported by the housing. The power supply circuit includes at least one circuit element for supplying electric power of a power source to the brushless motor. The fan is driven by rotation of the brushless motor to generate a cooling air flow that flows from the inlet hole to the exhaust hole in the housing. The housing includes a first housing including a grip portion and supporting the brushless motor. The inlet hole is formed in the first housing. The at least one circuit element is disposed inside the first housing and is cooled by the cooling air flow.

Abstract: There is provided a controller for magnetic levitation equipment comprising a plurality of current source modules for connecting to at least one power supply for direct current, DC, and said current source modules comprising current channels for actuating coils of the magnetic levitation equipment, and a controller device connected to the current source modules by a control connection for controlling switching of electric current by the current source modules to the current channels. The current source modules combine discrete components for amplifying and switching electric current to the current channels into a single package. In this way, manufacturing and maintenance of the controller is facilitated, since manufacturing and maintenance may be based on the current source modules instead of discrete components, e.g. gate drivers, IGBTs, power mosfets and diodes.

Abstract: An electric drive unit that includes an electric motor having a rotor with a rotor shaft and a heat exchanger that is received in the rotor shaft. The heat exchanger has a plurality of heat exchanger plates, each of which having a hub, a rim member, and disc spring portion that interconnects the hub and the rib member. Each disk spring portion defines a plurality of coolant apertures. The heat exchanger plates are press-fit to the rotor shaft such that each disc spring portion is deflected from a pre-installation state, and each rim member is engaged to an interior surface of the rotor shaft while being spaced apart from adjacent rim members along a rotational axis of the rotor. A first coolant passage is disposed through the hubs of the plates. The coolant apertures in the heat exchanger plates cooperate to form a plurality of second coolant passages.

Abstract: An electric machine includes a stator and a rotor. The rotor includes stacked laminations forming a rotor core. The rotor rotates relative to the stator about a central axis. The rotor core has an outer diameter. Each lamination includes a plurality of magnet slots. Each magnet slot includes a ferrite permanent magnet located therein, adjacent pairs of the ferrite permanent magnets defining a number of poles. Each of the laminations includes a plurality of non-circular rotor bar apertures spaced about the central axis of the rotor and disposed adjacent to and radially inward of the rotor outer diameter. A non-cylindrical rotor bar is disposed in each respective of the plurality of rotor bar apertures. The rotor bars are formed of a conductive material, wherein at least some of the plurality of rotor bars collectively form a rotor bar cage.

Abstract: The invention is comprised of individual planks with positively charged triboelectric pads attached, connected by copper strips and suspended by neodymuim magnets over a mirrored overlaying of planks, of the same length and width of the prior, with negatively charged triboelectric pads also connected by a copper strip. The overlayed planks stabilized by wood pegs.

Abstract: A motor and a driving member are provided. The motor has a rotor centered on and rotatable along a central axis and having a shaft and a bearing holding the shaft to be rotatable; a stator radially opposite to the rotor; a coil winding around the stator; a bearing holder; a bus bar holder on one or the other side of the bearing holder in an axial direction; a substantially cylindrical housing having an opening on a top side in the axial direction. The rotor, the stator, the bearing holder, and the bus bar holder are in the housing. A power bus bar and a signal bus bar are integrally formed on the bus bar holder which axially pushes against and is fixed to the bearing holder; a circuit board and a sensor are between the holders. This structure reduces an axial dimension of the motor and miniaturizes the motor.

Abstract: A method for producing a stator for an electrical machine includes providing the stator including a ring-shaped stator body, from which a plurality of stator teeth arranged spaced apart along a circumferential direction of the stator body protrude radially to the inside. A space is thereby provided between two stator teeth adjacent to one another in the circumferential direction. Second, a first injection molding of two stator teeth adjacent to one another in the circumferential direction with a plastic is performed. Third, a stator winding is arranged in the space. Fourth, a second injection molding of the stator winding arranged in the space with the plastic is performed such that an air gap and/or an air trap between the stator teeth injection molded in the second step and the stator winding after the arrangement of the stator winding in the space in the third step, is filled with the plastic.

Abstract: To provide a rotary electric machine which is improved in cooling performance. The rotary electric machine includes a rotor; and a stator which, being disposed opposite the rotor, has a stator core having a plurality of slots therein and a stator winding wound in the plurality of slots, wherein the stator has a plurality of coil ends which are formed protruding from an axial end face of the stator core and between adjacent ones of which is provided a radial clearance passing through from the inner diameter side to the outer diameter side, and wherein the stator includes a bus bar which, being disposed on the inner diameter side of the plurality of coil ends so as to occlude the clearances between the plurality of coil ends, guides a refrigerant, which is supplied from the radial direction of the stator, to the plurality of coil ends.

Abstract: Systems for a voltage balanced multi-set hairpin windings for electric motors are provided. The systems comprise a stator assembly of an electric motor system, a plurality of radial slots positioned around an inner cylindrical surface, and a winding scheme for the stator assembly including alternating positioning of a hairpin wire having a seven slot span and another hairpin wire having a five slot span in four sub-circuits.

Abstract: A high voltage electric machine and power distribution system including one or more of such electric machines are provided. In one aspect, a high voltage electric machine includes a stator, a rotor, and a housing encasing at least a portion of the stator and rotor. The stator is modularized into cascaded voltage stator modules. The stator modules are galvanically isolated from one another by intermodular separators. At least one intermodular separator is positioned between each adjacent pair of stator modules. The stator modules are also galvanically isolated from the housing by a housing separator. The housing separator is positioned between the stator modules and the housing. Each stator module has an associated set of windings that are wound only within their associated stator module.