Abstract: An electric machine assembly includes a housing having a first portion and a second portion. The electric machine assembly also includes a midframe coupled between the first and second portions such that the mid-frame and the first portion partially define a first compartment and such that the mid-frame and the second portion partially define a second compartment. A terminal box is coupled to the mid-frame and configured to house a first plurality of electrical components. A stator is positioned within the first compartment and a second plurality of electrical components positioned with the second compartment. The stator and the second plurality of electrical components are electrically coupled by a first plurality of wires extending through the mid-frame, and the first plurality of electrical components are electrically coupled to the second plurality of electrical components by a second plurality of wires extending through the second compartment and into the terminal box.

Abstract: An electric motor assembly suitable for use in a laundry washing machine or dryer or washer-dryer, is of the axial flux permanent magnet synchronous motor direct-drive type, with the stator coils carried by a rotor bearing housing component to provide a primary heat conduction pathway from the stator coils to the bearing housing component, and to a drum of the machine. The motor may be positioned between axially spaced bearings mounting the rotor.

Abstract: A rotor bearing arrangement is provided for supporting a rotor shaft (14) of an electric motor having a longitudinal axis (L). The rotor bearing arrangement comprises a bearing saddle (18) for radially supporting a rotor shaft (14) of the electric motor in an operating state of the electric motor; and a biasing means for exerting a biasing force (F1) towards the bearing saddle (18) in an operating state of the electric motor The rotor bearing arrangement is characterised in that the bearing saddle (18) is shaped such that it forms a dedicated main first contact area (36a) and a dedicated main second contact area (36b) designed to contact the rotor shaft (14) of the electric motor in an operating state of the electric motor.

Abstract: The disclosure provides a pod propulsion system including first and second counter rotating propellers for providing thrust to propel a marine vessel. The pod propulsion system includes a first electric motor (i) for rotating the first propeller and (ii) electrically coupled to a first drive, the first drive being configured to control the first motor and a second electric motor (i) for rotating the second propeller and (ii) electrically coupled to a second drive, the second drive being configured to control the second motor. The first and second drives respectively control the first and second motors interdependently.

Abstract: A cordless, hand-held power tool, such as a hammer drill/driver, an impact driver, an impact wrench, etc., that includes a brushless direct current (“BLDC”) motor. Each of the hand-held power tool includes a removable and rechargeable battery pack, electronics, and a BLDC motor that have been designed and balanced to produce high-performance-capable (e.g., high-power, high-current, high-torque) hand-held power tool. The hand-held power tool is capable of delivering high instantaneous (i.e., short duration) current to the BLDC motor for short-duration high power operation and high continuous (i.e., long duration) current to the BLDC motor for long duration high power operation. Additionally, the short and long duration power is capable of being provided in a smaller (in size) and lighter (in weight) power tool.

Abstract: An anti-erosion structure of a motor includes a housing configured to accommodate a stator, a rotor disposed inside the stator, and a shaft disposed inside the rotor; a rear cover coupled to a rear side of the housing; and a ground structure configured to ground the shaft. The ground structure includes a ground bearing installed on the shaft, and a conductor bar having one side fixed to the rear cover and another side contacting the ground bearing.

Abstract: A shaft voltage reduction structure is mounted on an electric machine having a bearing house and a rotor shaft rotatably connected together, and includes an electrically conductive main body, at least one electrically conductive bearing, and an electrically conductive shaft. The conductive main body is mounted to a bottom of the bearing house and includes a conductive shaft barrel projected from a center thereof. The conductive shaft barrel internally defines a shaft receiving hole, in which the conductive bearing is received. The conductive shaft includes a connecting end and a pivotal end connected to the rotor shaft and the shaft receiving hole, respectively. A shaft voltage across the rotor shaft of the electric machine is guided by the conductive shaft to release in a closed loop formed among the conductive main body, the conductive bearing and the bearing house, so as to reduce the shaft voltage of the electric machine.

Abstract: An electric axle is provided. The electric axle includes, in one example, a first electric machine directly coupled to a first planetary gear set, a second electric machine directly coupled to a second planetary gear set and a housing. The housing includes a first section that encloses the first electric machine and the first planetary gear set, a second section that encloses the second electric machine and the second planetary gear set, and a decreased diameter section that extends between the first section and the second section.

Abstract: A motor includes a rotor including a shaft centered on a central axis extending vertically, a bearing that supports the shaft, an air-core coil that is radially outward of the rotor and extends in an axial direction, and a back yoke that includes an axially extending shape with a linear portion having a coil shape, and includes an inner peripheral surface to which the air-core coil is fixed.

Abstract: A rotor including a shaft mounted around an axis of rotation; —a laminated core mounted coaxially on the shaft, the laminated core extending between a front side face and a rear side face. It includes first internal cavities, a plurality of permanent magnets housed inside the first internal cavities, a front flange in the form of discs and arranged on either side of the laminated core. The shaft is provided with an internal inlet channel for circulating a coolant. The front or rear flange is configured to form, with the front or rear side face, at least one front outlet channel or rear outlet channel inside which a coolant is circulated. The front or rear outlet channel connected to the inlet channel opens at an outlet opening at the outer periphery of the front flange or rear flange.

Abstract: A generator module includes a housing arranged for fixing to a combustion engine, a stator fixed in the housing, and a rotor rotatable within the stator. The housing includes a first conical surface and a first through hole, and the rotor includes a rotor support flange having a second conical surface and a second threaded hole. The second threaded hole is arranged for receiving a threaded fastener extending through the first through hole and threaded into the second threaded hole to pull the rotor support flange against the housing to secure the second conical surface against the first conical surface.

Abstract: Provided is an actuator including: a housing having first and second accommodation spaces; a driving motor having a BLDC type motor installed in the first accommodation space of the housing and generating a rotational output from a rotor; a printed circuit board (PCB) mounted on an upper side of the driving motor and having a motor driving circuit mounted for generating a motor driving signal according to reception of an external control signal; a gear train installed on an upper portion of the PCB in a longitudinal direction to reduce the rotational output of the driving motor to increase torque; and an output shaft installed in the second accommodating space of the housing and outputting a torque increased rotational output transmitted through the gear train to the outside of the housing.

Abstract: An electric machine including a stator, a rotor within the stator, and a shaft to which the rotor is mounted. The shaft extends through the stator. A first bearing and a second bearing support the shaft within the stator to allow the shaft and the rotor to rotate within the stator. The rotor is between the first bearing and the second bearing. A first magnetic core is at the shaft between the rotor and the first bearing. The first magnetic core is configured to suppress a bearing current flowing across the shaft, the first bearing, and the second bearing.

Abstract: A drive module is employed for use in a hybrid electric vehicle (HEV) powertrain or in a battery electric vehicle (BEV) powertrain. The drive module serves to propel movement of the accompanying hybrid electric vehicle or battery electric vehicle. In an implementation, the drive module includes a housing, an electric motor, a gear assembly, a coolant sump, and a coolant passage. The electric motor has a stator and a rotor. The rotor has a shaft. The gear assembly has its movement driven by the shaft. The coolant passage resides in a wall of the housing. Amid use, coolant is drawn from the coolant sump via the coolant passage.

Abstract: The invention relates to a stator device (1) for an electric machine of a flywheel mass accumulator device, having a laminating unit (2), having a winding (5) and at least two vacuum-side motor phase connection cables (6) connected to the winding (5), having a cylindrical sleeve unit (3), on the outer lateral surface (3a) of which the laminating unit (2) is arranged, and having a sealing unit (7), which is arranged on an inner circumferential surface (3b) of the sleeve unit (3) and which is designed to connect the vacuum-side motor phase connection cables (6) in each case in a vacuum-tight manner to a respective circumferential-side motor phase connection cable (6?), in order to provide a stator device (1), which is improved in terms is of its installation space requirement, for an electric machine of a flywheel mass accumulator device.

Abstract: A power working machine comprises a working portion, a driving portion, a main body portion, and a blowing portion. The working portion is configured to act on a work object. The driving portion is configured to drive the working portion. The main body portion includes a bottom surface portion, an intake port, and an exhaust port, and is configured to form a storage space for storing the driving portion and an airflow path leading from the intake port to the exhaust port through the storage space. The blowing portion is configured to generate an airflow in the airflow path toward the exhaust port. The intake port is configured to open in a direction having a vertical downward component in a first state in which the power working machine is placed with the bottom surface portion facing a horizontal surface.

Abstract: To provide a motor capable of meeting a demand for size reduction. The motor includes an axial member, a tubular rotating body rotatable in relation to the axial member, a bearing supporting the rotating body with respect to the axial member, and a stator inside the rotating body. The rotating body preferably includes a tubular member formed of a single member, and a magnet.

Abstract: Disclosed is a drive unit (1) comprising a housing (2), an electric motor (3) disposed inside the housing, and at least one oil chamber (15) which is disposed in the housing (2). The oil chamber (15) comprises an oil region (21) and an air region (22) and is closed off to the outside by a housing cover (35). The housing cover (35) comprises at least one vent opening (36, 37) for venting the oil chamber (15), which is disposed at a distance from a radial outer region of the housing cover (35) and is fluidically connected to an element (32, 38, 47, 48) for venting the oil chamber (15).

Abstract: Rotor bearings are provided. The motor bearing can be used in an electric submersible pump motor. The bearing can include a body and one or more anti-rotation pins disposed partially in a groove in an outer surface of the body and configured to be received in a corresponding keyway in an inner diameter of a stator. The anti-rotation pin prevents or inhibits rotation of the bearing relative to the stator.

Abstract: A device for economizing power output includes a circular rotary unit and a holder. When the rotational output end of a power source is connected to a power connection portion of the circular rotary unit and the rotational power is output from a power connection portion to a load, the circular rotary unit is suspended by the holder, so that when the power source drives the circular body to rotate, the circular body can rotate relative to the holder without friction or being in contact with brackets of the holder. The gravitational inertia generated by the circular body during its high-speed rotation enables the power source to drive the load.

Abstract: A rotor includes a rotor core having magnet-receiving holes formed therein, permanent magnets embedded respectively in the magnet-receiving holes of the rotor core, and an annular end magnet. The rotor is configured to generate both magnet torque by the permanent magnets and reluctance torque by outer core portions located on a radially outer side of the permanent magnets in the rotor core. The end magnet is provided at a position facing axial end faces of the outer core portions. Magnetic poles of the end magnet are arranged so as to respectively repel the outer core portions.

Abstract: One embodiment comprises: a fixed unit comprising first to fourth magnets; and a movable unit disposed so as to be spaced apart from the fixed unit. The movable unit comprises: a coil comprising first to fourth coil units facing the first to fourth magnets; a position sensor comprising a first sensor for outputting a first output by detecting a magnetic field of the first magnet, a second sensor for outputting a second output by detecting a magnetic field of the second magnet, and a third sensor for outputting a third output by detecting a magnetic field of the third magnet; a first control unit for receiving the first and second outputs and driving the first and third coil units; and a second control unit for receiving the second output and driving the second and fourth coil units, wherein the movable unit moves in a direction perpendicular to an optical axis or rotates about the optical axis, by means of an interaction between the first to fourth magnets and the first to fourth coil units.

Abstract: Apparatuses and methods for multistage molding of contact lenses containing low oxygen permeable components or oxygen impermeable components. Components may be embedded within a contact lens by forming a device on a polymer substrate, molding a spacer onto a male mold, bonding the device to the spacer, removing the polymer substrate, and molding the remainder of the contact lens.

Abstract: A centrifugal blower includes a motor part having a rotor provided on a rotating shaft of an impeller, a coil provided around the rotor, and a motor housing that accommodates a coil, an inverter part having an inverter unit that supplies drive power to the motor part, and an inverter housing connected to the motor housing and configured to accommodate the inverter unit, and a cooling fan that is provided on the rotating shaft, rotates with the impeller and allows cooling air to flow through the inverter housing and the motor housing in order, wherein the inverter unit is disposed to be arranged with respect to the coil in a direction of a rotation axis of the rotor.

Abstract: A stand-alone motor unit for use with a piece of power equipment includes a housing and a flange coupled to the housing on a first side thereof. A plurality of apertures through the flange defines a first bolt pattern that matches an identical, second bolt pattern defined in the piece of power equipment. An electric motor has a power output of at least about 2760 W. The motor includes a stator having a nominal outer diameter of up to about 80 mm and a rotor supported for rotation within the stator. A power take-off shaft receives torque from the rotor and protrudes from one of the flange or a second side of the housing. A controller is positioned within the housing and electrically connected to the motor. A battery pack for powering the motor has battery cells having a nominal voltage of up to about 80 V.

Abstract: A device has a housing and rotors rotatably coupled to the housing. Each rotor has a magnet on at least one side of the rotor. Printed circuit board (PCB) stators are located axially between the rotors and coupled to the housing. The PCB stators have layers, and each layer has coils. The number of rotors disks is equal to the number of stators plus one. The stators are interleaved with the rotors. A shaft is coupled to the rotors and the housing. The shaft has a hollow section coupled to a source of a liquid coolant through a rotary connector and to radial channels in the shaft that dispense a liquid coolant between the rotors and PCB stators. The shaft has flanges with different diameters configured to receive the rotors disks with respective matching bore diameters. In addition, the housing has a sump to collect the liquid coolant.

Abstract: The present invention relates to a lubricating composition comprising at least one base oil and at least one additive chosen from anti-wear additives, extreme pressure additives, antioxidants, anti-corrosion additives, metal deactivator additives, anti-foam agents, dispersants and mixtures thereof, said composition having a boron concentration less than or equal to 100 ppm by weight and a nitrogen concentration strictly greater than 100 ppm by weight and less than or equal to 500 ppm by weight, with respect to the total weight of the lubricating composition.

Abstract: A speed reducer according to one aspect of the present disclosure includes: speed reducing units for decelerating a rotational driving force of an electric motor and transmitting the decelerated rotational driving force to a rotational driving unit; and a ring gear meshing with a gear decelerated by a speed reducing unit on the electric motor side in a direction of a rotational axis of the electric motor. The ring gear is provided with a water-cooling channel that communicates cooling water. The water-cooling channel includes a first groove having a small depth and a second groove having a larger depth and extends in a C-shape as the ring gear is viewed from the direction of the rotational axis. The ring gear is provided with a motor flange mounted to the electric motor. The motor flange is provided with an inlet port and an outlet port connected to the water-cooling channel.

Abstract: An assembly is provided for a turbine engine. This turbine engine assembly includes a rotating assembly and a sensor. The rotating assembly is configured to rotate about an axis. The rotating assembly includes an engine shaft and a phonic wheel threaded onto the engine shaft. The phonic wheel includes a lubricant scoop. The sensor is configured to measure fluctuations in a magnetic field induced by the phonic wheel during rotation of the rotating assembly about the axis.

Abstract: An electric machine grounding system with low impedance includes a rotor that has a shaft assembly and that is configured to rotate about an axis. The shaft assembly has a surface. A housing supports the shaft assembly for rotation of the rotor. A holder extends from the housing. A ground assembly is held between the holder and the shaft assembly and includes a plurality of strands that extend to the surface to ground the shaft assembly to the housing.

Abstract: A motor-integrated fan 1 including one or more motors integrated therein comprises: a shaft part 11 which serves as a supporting system disposed at the center of a rotational axis; a rotation part 12 which is a rotating system rotating about the shaft part 11; a duct 13 which serves as a supporting system provided on the outer periphery of the shaft part 11; and a motor 14 which rotates the rotation part 12, wherein the rotation part 12 comprises: a plurality of blades 32 rotatably supported at least on the shaft part 11 and rotating thereabout, the blades 32 being arranged in a circumferential direction of the rotational axis I; and a rotation support ring 33 connected on one side of each of the blades 32 in a radial direction of the rotational axis, the rotation support ring 33 supporting the plurality of blades 32.

Abstract: A discharge device for discharging an electrical charge and/or voltage from a rotor of an electric motor via a shaft from a first discharge partner to a second discharge partner, the discharge device including a support body device, wherein the support body device includes a connecting portion for electrical and mechanical connection to one of the discharge partners and expanding portions for expanding the connection of the support body device to the one of the discharge partners, wherein the expanding portions include the connecting portion.

Abstract: An electric machine includes a stator, a rotor, a housing and a shaft. The stator is connected to the housing via an electrically insulating torque support. An electrically insulating flange is disposed on the shaft. The shaft is connected to a flange of a bearing shaft via said flange, the bearing shaft housed in a bearing which is arranged in the housing.

Abstract: A method includes pumping coolant into a cooling system of a generator while the generator is generating electrical power. The method includes regulating flow into the cooling system using a pressure relief valve to recirculate a portion of the coolant back to an inlet of the pump. Using the pressure relief valve includes actuating the pressure relief valve based on input from the cooling system and/or from the generator.

Abstract: Rotor bearings for ESP motors can include anti-rotation tabs configured to engage with a stator during assembly of the ESP motor. Prior to insertion of the rotor bearing within the stator, the anti-rotation tabs may be held in place within axial slots in the outer surface of a bearing bushing of the rotor bearing using retention rings. The retention rings and the bearing bushing may be configured to allow for interference fit.

Abstract: An electric motor and an electrical appliance are provided. The electric motor includes a rotating shaft, a stator, a rotor disposed on the rotating shaft, spaced apart from the stator, and embedded in the stator, a first end cover, and a first bearing. The first bearing includes a first outer ring fixed on the first end cover and insulated from at least part of the first end cover, a first inner ring embedded in the first outer ring, and a first ball disposed between the first outer ring and the first inner ring. The rotating shaft is fixed on the first inner ring and rotationally supported on the first end cover. The part of the first end cover that is insulated from the first outer ring is short-circuited with a stator core of the stator and is grounded.

Abstract: An apparatus includes a plurality of beads a linking assembly joining the beads together. The beads and the linking assembly are arranged in an annular arrangement and sized to form a loop around an anatomical structure in a patient. The loop may move between a contracted and expanded configuration. The loop is magnetically biased toward the contracted configuration by a magnetic bias of the beads. Each bead includes a housing having a first piece and a second piece that together define a magnetic chamber. A magnetic is within the magnetic chamber. A weld joins the first piece and the second piece while hermetically sealing the magnet chamber. The first piece of the housing includes a mounting feature integrated with a surface of the first piece. The mounting feature mates with a fixture to constrain the first piece of the housing as the weld is formed.

Abstract: A power transmission device, includes a motor; a gear mechanism connected downstream of the motor; a drive shaft connected downstream of the gear mechanism and disposed passing through an inner periphery of the motor; a pump that sucks oil through a pump inlet; and a plate that includes a facing surface facing the gear mechanism in an axial direction. The pump inlet is disposed adjacent to the plate on a back surface side of the facing surface.

Abstract: An electromagnetic propulsion unit for a land-based wheeled or tracked vehicle is provided. The propulsion unit includes a balancing plate assembly with an outer plate designed to couple to a rotor assembly. In the balancing plate assembly, the outer plate includes a lip that, during rotor assembly rotation, pumps one or more fluids from an air gap formed between the rotor assembly and a stator and the outer plate is constructed out of a non-electrically conductive material.

Abstract: A bearing device includes first and second rings each having end faces and being configured to rotate relative to one another, and the second ring has an annular groove. A socket having an electrically insulating sleeve is mounted on the second ring with the insulating lining radially interposed between the second ring and the socket. End faces of the electrically insulating lining each have an annular groove with a bottom that is offset axially inward relative to the respective first and second end faces of the second ring and to the respective first and second end faces of the socket. A method includes grinding end faces of the socket and/or second ring to reduce an axial depth of the grooves in the insulating layer.

Abstract: An electric machine having a stator and a rotor is divided into sub-machine systems by winding sections of the stator or rotor that can be switched separately for each phase. A winding section of each phase is assigned to each sub-machine system. Each sub-machine system acts as an electric machine. The sub-machine systems can be operated individually or in combination, depending on the requirements placed on the electric machine; the winding sections are correspondingly switched for this purpose. The switching between the winding sections is advantageously carried out mechanically with a contact disc.

Abstract: A motor attachment structure for an electric vehicle includes: a motor generator including a tubular rotor configured to rotate together with a motor output shaft in an integrated manner, and a tubular stator placed radially outwardly from the rotor; a tubular bearing configured to rotatably support a rotating body rotating together with the motor output shaft in an integrated manner; a case in which the motor generator and the bearing are accommodated; and an attachment attached to the case. The attachment supports an outer peripheral surface of the bearing.

Abstract: The present invention provides a rotary electric machine which suppresses a temperature rise of bearings by reducing heat transfer from internal air to the bearings and heat conduction from a rotor core, and improves the lubrication life of the bearings. A rotary electric machine of the present invention comprises a rotor including a shaft; a stator placed facing the rotor with a certain gap (an air gap) therebetween and supported by a stator frame; bearings which sustain the shaft; and end brackets which hold the bearings, wherein one of the end brackets includes a heat insulating layer on an inner side or an outer side of the machine to prevent heat from flowing into the bearings.

Abstract: The present disclosure relates to a system for manufacturing a hybrid component including a first thermal supplier configured to heat a steel plate, a rolling roll for undercut configured to pressurize the steel plate heated by the first thermal supplier, and to form an undercut on one surface of the steel plate, a first molding roll configured to pressurize the steel plate formed with the undercut to mold the steel plate in a shape of a component to be manufactured, a composite material feeder configured to supply a composite material tape to be seated on one surface of the steel plate formed with the undercut through the first molding roll, and a composite material pressurization roll configured to pressurize the steel plate on which the composite material tape is seated.

Abstract: A shaft configured to suppress damage without having an increased diameter is provided. The shaft includes a supported portion supported by a bearing and an adjacent large-diameter portion larger in diameter than the supported portion and disposed closer to a center in an axial direction than the supported portion. The shaft is configured to rotate integrally with a rotor while holding the rotor. A sectional shape of a boundary portion between the supported portion and the large-diameter portion in a longitudinal section of the shaft is an arc shape that is, on an outer side in the axial direction with respect to a virtual rising point, recessed inward from an outer edge in the radial direction of the supported portion and raised outward in the radial direction from the outer edge, as the arc shape extends from the outer to an inner side in the axial direction.

Abstract: An automated cleaning device includes a chassis, a controller operably connected to a drive assembly and configured to move the chassis within an area to be cleaned in repeated cleaning cycles, a cleaning unit carried by the chassis, a sensor configured to detect material drawn into the cleaning unit and provide a debris signal corresponding to an amount of material drawn into the cleaning unit, the controller being operably connected to the sensor and configured to generate a high-material indicator in response to the debris signal exceeding a predetermined debris threshold, and determining whether the autonomous cleaner is in a high traffic area when the chassis moves within the area to be cleaned based on locations of high-material indicators.

Abstract: An apparatus configured to be positioned on a tubular string in a wellbore formed in a subsurface formation. The apparatus comprises a generator assembly disposed on the tubular string and configured to output power to a downhole tool. The generator assembly includes a first generator configured to output a first power to the downhole tool. The generator includes a second generator configured to function as an exciter for the first generator.

Abstract: An actuator is provided. A movable body oscillating in an actuator has a shaft, and first and second inner frame members fixed to the shaft. A support body has a cylindrical case, a first and second lid members fixed to the ends of the case, and a first and second outer frame members disposed inside the case. The first inner frame member is connected to the first outer frame member by the first connecting body, and the second inner frame member is connected to the second outer frame member by the second connecting body. The first lid member has a pressing convex portion which abuts the first outer frame member, and the second lid member has a pressing convex portion which abuts the second outer frame member. The number of the pressing convex portions arranged spaced apart along the circumference direction is limited to two or three.

Abstract: There is provided an electric motor/generator comprising a stator and a rotor. The stator has an outer perimeter. The rotor at least coaxially encloses the outer perimeter of the stator. The rotor is rotatable relative to the stator around a rotation axis. The rotor and the stator are separated by a flux bearing gap over which in working magnetic flux occurs. The rotor and the stator are separated by a protective gap. The protective gap is configured to close, during a deformation of the rotor, before the flux bearing gap closes, thereby avoiding closure of the flux bearing gap. The motor/generator is characterized in that the stator comprises a roller bearing and an axle. The roller bearing is coupled to the axle and rotatable around the axle. The axle is arranged off-center from the rotation axis. A distance between the roller bearing and the rotor defines the protective gap.

Abstract: An outer rotor brushless motor includes: a shaft; a rotor; a stator; a tubular bushing at one side of the stator; an impregnated bearing at the other side of the bushing; and a washer rotatable integrally with the shaft. The bushing has: a fixed portion fixed to a core inner peripheral surface, the fixed portion having a first end surface facing a bearing end surface, and a first inner peripheral surface facing an outer peripheral surface with first clearance in between; and a housing having a second inner peripheral surface with a greater diameter than the first inner peripheral surface, on the one side of the fixed portion. An oil repellent finish is applied to a surface of the bushing. The washer is placed radially inward of the second inner peripheral surface. Second clearance greater than the first clearance is between the bearing end surface and the first end surface.