Abstract: An object of the present invention is to provide a rotary electric machine in which damage of a magnet is suppressed and cooling performance of the magnet is improved. The present invention includes a rotation shaft 21, a rotor 20, and core end members 204 and 205 connected to end portions of the rotor 20. The rotor 20 includes a magnet 201, a rotor core 200, and interposed members 301a and 301b interposed between the magnet 201 and the rotor core 200. In the rotor core 200, a magnet insertion hole 202 for disposing the magnet 201 and flux barriers 203a and 203b are formed. The rotation shaft 21 is provided with a first flow path 21a through which a refrigerant flows. The core end members 204 and 205 are provided with a second flow path 504a joining the first flow path 21a and the flux barrier 203a.

Abstract: A motor may include a stator with a coil disposed on an inner side thereof, a rotor at least partially surrounded by the coil and having an accommodation space in which a refrigerant for cooling the coil may be accommodated, a shaft connected to the rotor to rotate integrally with the rotor, and a pipe communicating with the accommodation space so that the refrigerant may be introduced from an external source and the refrigerant flows into the accommodation space therethrough.

Abstract: A stator for a rotating electrical machine includes a stator core, a stator winding disposed on or in the stator core, and an annular resinous seal which covers an axial end portion of a coil end of the stator winding. The resinous seal has an inner circumferential surface which is shaped to have a first inner diameter close to the stator core and a second inner diameter farther away from the stator core. The first inner diameter is selected to be smaller than the second inner diameter. This ensures the stability of electrical insulation of the stator winding.

Abstract: An electric rotating machine comprising a stator, a rotor rotatable about an axis of rotation in relation to the stator, a rotor compartment holding the rotor, a fluid system for cooling one or more of the rotor and stator and a fluid-guiding member having a front and a back. The front of the fluid-guiding member faces the rotor compartment while the back of the fluid-guiding member faces away from the rotor compartment. The fluid-guiding member comprises a guide for guiding a fluid. The guide extends from the front of the fluid-guiding member toward the back of the fluid-guiding member. The guide is configured to guide a fluid from the front of the fluid-guiding member to the back of the fluid-guiding member upon rotation of the rotor to remove a fluid from the rotor compartment.

Abstract: A gyroscopic roll stabilizer includes an enclosure, a flywheel assembly, a bearing, a motor, and a bearing cooling circuit. The enclosure is mounted to a gimbal for rotation about a gimbal axis and configured to maintain a below-ambient pressure. The flywheel assembly includes a flywheel and flywheel shaft. The bearing rotatably mounts the flywheel assembly inside the enclosure for rotation about a flywheel axis. The bearing has an inner race and an outer race. The inner race is affixed to the flywheel shaft, and the outer race is held rotationally fixed relative to the enclosure. The motor is operative to rotate the flywheel assembly. The bearing cooling circuit is configured to transfer heat away from the bearing by recirculating cooling fluid along a closed fluid pathway. The gyroscopic roll stabilizer is configured to transfer heat away from the inner and/or outer race of the bearing to the cooling fluid.

Abstract: An electric motor can be employed for use in a hybrid electric vehicle (HEV) or in a battery electric vehicle (BEV), as example applications. In an implementation, the electric motor has a stator assembly with a multitude of laminations exhibiting an axially-stacked arrangement. The laminations establish coolant channels at a radially-outboard location thereof, and establish slots at a radially-inboard location thereof. Conductors such as windings are disposed at the slots. Some or more of the coolant channels and some or more of the slots are in fluid communication with each other whereby coolant flows through the coolant channels, to the slots, and into contact with the conductors. Enhanced cooling effectiveness at the stator and elsewhere results.

Abstract: A fireproof cover for a stator winding of a stator, in particular of electromotive pumps, comprising two or more fire protection caps. The fire protection caps are made of a flame retardant material and can be placed together in an engagement position. The fire protection caps in the engagement position form a knockout opening for carrying through an iron core of the stator and form such a closed fireproof casing for the stator winding, which, however, is air-permeable through a joining gap between the fire protection caps and/or between at least one fire protection cap and the iron core, that as a result of a coil burn of the stator winding, flying sparks and flame propagation to components lying outside the fireproof casing are prevented.

Abstract: An annular heat sink for fastening to an outer shell wall of a heat-emitting electric motor includes at least one guide wall portion which is arranged on the annular heat sink and covers portions of at least one flow duct, delimited laterally by peripheral cooling fins, from the outside, in such a way that an air flow which has entered into a flow duct in a first region of a side of the annular heat sink which faces the incoming air is deflected into a second region of a side of the annular heat sink which faces away from the incoming air. The heat sink may be used in an electric motor, which may in turn be used in a drive arrangement.

Abstract: A rotor (1) of an electric motor (20) has a rotor body (21) with a rotor shaft receptacle opening (22) for receiving a rotor shaft (3), and a rotor sheath (23) is on the rotor body (21) outward of the rotor shaft receptacle opening (22). Magnetic field-inducing components (10) are arranged in the rotor body (21). The rotor body (21) further has first and second end faces (14, 18) facing away from one another. The rotor (1) also includes a cooling device (4) with a supply channel (5), a drainage channel (6) and cooling channels (11) formed in the rotor body (21) between the rotor shaft receptacle opening (22) and the rotor sheath (23). The cooling channels (11) are arranged adjacent to the magnetic field-inducing components (10). A method for manufacturing a rotor having a cooling device also is provided.

Abstract: A coolant system is arranged to be driven by a prime mover of an aircraft. The coolant system comprises a fluid circuit with a fluid therein, the fluid for cooling an electricity generator located in the fluid circuit. The fluid circuit comprises: a cooling path passing via at least one cooled component of the generator; a first fluid flow source configured to deliver a first fluid flow to the cooling path; a second fluid flow source configured to generate a second fluid flow; and a valve arrangement configured to selectively direct at least a proportion of the second fluid flow away from the cooling path in dependence on a measured operational parameter of the generator. An aircraft propulsion system and an aircraft can also include the coolant system.

Abstract: A drive unit (10) for a manually driven vehicle, in particular a bicycle or an EPAC, includes a housing (12), an electric motor (18) with a stator (44) and a rotor (46), a stator support (48), and an electronic unit (50). The stator support (48), the stator (44), the rotor (46), and the electronic unit (50) are designed in the form of one unit (56), which can be preassembled so that the preassembled unit (56) is installable into the housing (12).

Abstract: A superconducting motor including a rotor, a heat sink, and a bearing. The rotor includes a superconducting winding formed from a superconducting material. The heat sink is positioned within the superconducting motor to absorb heat produced by the superconducting motor. The bearing includes an inner race, an outer race, and a rolling element. The bearing rotatably supports the rotor and is thermally connected to each of the rotor and the heat sink to transfer heat from the rotor to the heat sink. The rolling element is formed from a material having, at 25 K, a thermal conductivity of 20 W/mK or more and an ultimate tensile strength of 650 MPa or more. The rolling element may be formed from a copper alloy.

Abstract: The invention relates to an electric drive unit (10), in particular for a vehicle or motor vehicle, comprising an electric machine (12) and a transmission (14). The electric machine (12) is accommodated in a drive housing (18), and the transmission (14) is accommodated in a transmission housing (20), wherein the interior (19) of the drive housing (18) and the interior (21) of the transmission housing (20) are separated by a bearing wall (22), and at least one cooling channel (24) for cooling the electric machine (12) is formed on or in the drive housing (18). The electric drive unit (10) has an insert (26) which is designed and arranged such that a cavity (28) is produced in the drive housing (18) between the bearing wall (22) and the insert (26), and the cavity (28) is fluidically connected to the cooling channel (24). The invention also relates to a vehicle comprising a corresponding electric drive unit (10).

Abstract: A fluid distribution system for an engine including a fluid chamber. The fluid distribution system may include a first control opening in fluid communication with the fluid chamber. A rotor coupled to the fluid chamber may be configured to rotate the chamber about the axis to cause the fluid chamber to distribute fluid through the first control opening. A first channel coupled to the first control opening may be configured to receive the fluid through the first control opening. A second control opening may be formed in the first channel. A relief opening in the first channel may be configured to expose the first channel to an ambient pressure outside the first channel. The relief opening may be located downstream of the first control opening in a fluid flow direction of the first channel and upstream of the second control opening in the fluid flow direction of the first channel.

Abstract: An electric propulsion motor system includes a cylindrical stator and rotor, a fluid circulation system providing pressurized fluid, and conductors within winding slots. The stator has a yoke and a plurality of teeth extending radially inward from the yoke, with winding slots defined between adjacent teeth. Respective tooth tips extend circumferentially into adjacent winding slots and are radially adjacent to a first conductor within the winding slot, with a first channel through which pressurized fluid flows.

Abstract: An electric drive assembly with oil/water dual cooling is provided that includes a motor module, a gearbox module, a water cooling module and an oil cooling module. Lubricating oil is introduced into the front and rear windings of the motor through three oil conveying passages to improve the cooling performance of the motor. Moreover, the gearbox cavity and the motor cavity do not need to be sealed, which avoids the use of high-speed oil seal of motor shaft, and thus the cost of the drive assembly is reduced and the transmission efficiency is improved. The cooling fluid of the motor cools the lubricating oil through the heat exchanger of the gearbox, thereby solving the heat dissipation problem when the gearbox of the new energy vehicle operates at high speed constantly, and thus improving the service life and reliability of the gear and bearing.

Abstract: Disclosed herein is a heatsink for removing heat from a heat source. The heatsink comprises a surface for placing adjacent to the heat source comprising a plurality of cavities formed into the surface, the plurality of cavities open on a side of the surface away from the side of the surface for placing adjacent to the heat source, and a plurality of projections, each projection extending from the surface adjacent to a corresponding cavity. Each cavity comprises a throat region configured to restrict the flow of air between each respective cavity and the region between a corresponding pair of projections extending from the surface adjacent to the cavity.

Abstract: An object of the present invention is to suppress variations in an angle of a shoulder part of a segment coil to improve easiness in inserting segment coils in a stator core. A stator of an electric motor according to the present invention includes a stator core 12 in which a plurality of slots 12a are formed, and a plurality of segment coils 11 of U shapes inserted respectively in the plurality of slots 12a. The segment coil 11 includes a shoulder part 11a and a shoulder part 11b that are bent to form a U shape. In a front view of the U shape, a press mark 100a is formed on the shoulder part 11a and on the shoulder part 11b, the press mark being a dent sinking in a front-to-rear direction, from a front surface of the shoulder part 11a and from a front surface of the shoulder part 11b. The press mark 100a is formed also on a back surface of the shoulder part 11a and on a back surface of the shoulder part 11b.

Abstract: A ground-based cryogenic cooling system includes a means for cooling an airflow and producing chilled air responsive to a power supply. A liquid air condensate pump system is operable to condense the chilled air into liquid air and urge the liquid air through a feeder line. A cryogenic cartridge includes a coupling interface configured to detachably establish fluid communication with the feeder line and a cryogenic liquid reservoir configured to store the liquid air under pressure. The cryogenic cartridge can be coupled to a cryogenic liquid distribution system on an aircraft. The liquid air can be selectively released from the cryogenic cartridge through the cryogenic liquid distribution system for an aircraft use.

Abstract: A concentric manifold ring assembly comprises an internal distribution manifold for a generator. The manifold is for use in a direct-liquid-cooled alternator together with a mating housing to form a concentric fluid distribution channel that enables the transport and distribution of chilled coolant from a heat exchanger to select locations in the alternator via channels, ducts, and jets. The external heat exchanger feeds chilled coolant through a feed port where the incoming fluid is directed circumferentially via a channel formed by the manifold body and housing. From the circumferential flow, streams of coolant flow from drilled jet ports, while the circumferential flow back-cools rectifier mounting surfaces. Fluid flows flowing axially out of ducts to create an active end-to-end circulation of chilled fluid within the alternator to absorb thermal energy from alternator components before being drawn out of a return flow channel via a return flow port.

Abstract: An electric machine (1) for a motor vehicle drive train, having a stator (2), a rotor (3) mounted to rotate relative to the stator (3) and a drive schaft (4) receiving the rotor (3) for conjoint rotation, wherein, in addition to the rotor (3), a disk element (5), also connected to the drive schaft (4) for conjoint rotation and made of sheet metal, is arranged in an axial direction of the drive schaft (4), the disk element (5) having a transmitter contour (6), which can be detected by an eddy current sensor, and a coolant guiding contour (7), for deflecting a coolant stream towards the stator (2), and being pressed with an axial prestressing force against an end face (8) of the rotor (3).

Abstract: A turbomachine includes a fluid compressor section with a compressor wheel supported on a shaft and a compressor housing that houses the compressor wheel for rotation therein about an axis of rotation. The turbomachine also includes an e-machine section with an e-machine operatively connected to the shaft and configured to convert energy between the e-machine and the shaft as the shaft rotates. The e-machine section includes an e-machine housing that houses at least part of the e-machine. The turbomachine further includes a coolant jacket that is defined at least partly in the e-machine housing. The coolant jacket is configured to receive a fluid coolant flow therein for cooling the e-machine. Also, the turbomachine includes a turbulator insert member that is removably received within the coolant jacket and that sub-divides the coolant jacket for directing the fluid coolant flow through the coolant jacket.

Abstract: A cooling sleeve for an electric machine is provided. The cooling sleeve includes: a cylindrical body having an exterior surface, a first channel formed in the cylindrical body and having a first inlet for receiving a cooling fluid, and a second channel formed in the cylindrical body and having a second inlet for receiving the cooling fluid. The first inlet and the second inlet are formed on the exterior surface at a center along a length of the cylindrical body. A plurality of turbulators are formed in the first channel and the second channel and a cylindrical cover is configured to be disposed over the cylindrical body.

Abstract: An electric machine includes a housing having an inner surface; and a stator including a stator core mounted in the housing. The stator core includes a plurality of stator windings, a thermal bridge extends between the stator core and the inner surface of the housing. The thermal bridge is formed from a non-magnetic material and includes a plurality of individual thermal bridge elements.

Abstract: A simple and cost-effective device to shift a structural resonance in a vertical long shaft pump is disclosed. T disclosed device comprising portion of a motor of the vertical pump by using a plurality of fasteners, and one an upper plate and a lower plate being adapted for fitment at a non-driving end or more annular plates adapted for fitment at the non-driving end portion of the motor between the upper plate and the lower. Each of the one or more annular plates comprises an annular central hole with splined grooves to engage with cooling fins of the motor. The device further comprises tie rods for fitment with flanges of a column pipe of the vertical pump using Bellville washers and bolts, and mass blocks with matching square internal threading for fitment with the tie rods to add mass at required location.

Abstract: A dynamoelectric machine includes a shaft, a rotor arranged fixedly on the shaft for conjoint rotation, and a slip ring system enabling a rotor winding system to be contacted electrically and including a slip ring body having slip rings arranged spaced-apart axially behind one another and assigned to an electrical phase. The slip ring body is connected fixedly to the shaft for conjoint rotation and has between an inner side thereof and the shaft a section which forms an axially open cavity on both skies. In a region of the slip ring system, the shaft is hollow with a hollow shaft portion assigned to the slip ring system for routing feed lines to the rotor winding system. Recesses are provided on the cavity axially on an inside and axially on an outside for introducing a cooling medium flow axially into the cavity and discharge thereof into an outlet region.

Abstract: A motor cooling structure, including: branch flow-channels, shell flow-channels, end cover flow-channels, a liquid inlet and a liquid outlet. A plurality of the branch flow-channels are circumferentially arranged on a stator of a motor around an axis of the motor. The shell flow-channels includes a liquid inlet flow-channel, a plurality of shell long flow-channels and a liquid outlet flow-channel, which are circumferentially arranged on a reducer shell around the axis of the motor. The end cover flow-channels includes a plurality of the end-cover long flow-channels are circumferentially arranged on a motor end cover around the axis of the motor. The shell flow-channels, the plurality of branch flow-channels and the end cover flow-channels form a continuous total flow-channel. The liquid inlet and liquid outlet both disposed on the reducer shell are in communication with the liquid inlet flow-channel and liquid outlet flow-channel, respectively.

Abstract: A gyroscopic roll stabilizer includes an enclosure, a flywheel assembly, a bearing, a motor, and a bearing cooling circuit. The enclosure is mounted to a gimbal for rotation about a gimbal axis and configured to maintain a below-ambient pressure. The flywheel assembly includes a flywheel and flywheel shaft. The bearing rotatably mounts the flywheel assembly inside the enclosure for rotation about a flywheel axis. The bearing has an inner race and an outer race. The inner race is affixed to the flywheel shaft, and the outer race is held rotationally fixed relative to the enclosure. The motor is operative to rotate the flywheel assembly. The bearing cooling circuit is configured to transfer heat away from the bearing by recirculating cooling fluid along a closed fluid pathway. The gyroscopic roll stabilizer is configured to transfer heat away from the inner and/or outer race of the bearing to the cooling fluid.

Abstract: Methods and systems are provided for an electric motor. In one example, the electric motor may include a stator with end windings protruding axially, along a central axis of rotation of the electric motor, from a first end of the stator and a first end plate arranged at the first end of the stator. The first end plate may have an inner face with indentations configured to receive the end windings, the indentations including a thermally conductive material to interface with the end windings. In addition, the first end plate may include at least one cooling channel for flowing a coolant.

Abstract: The rotary electric machine (1) comprises a casing (10), a stator (40) comprising a stator body (41) secured within the casing and comprising first (411) and second (412) longitudinal end faces, notches (44) arranged and extending longitudinally within the stator body between the first and second longitudinal end faces, a coil passing longitudinally through the stator body through the notches and comprising first (43) and second (42) coil head assemblies extending in projection from at least one of the first and second longitudinal end faces of the stator body, a first chamber (15) in the shape of a ring portion arranged around the first coil head assembly and a second chamber (14) in the shape of a ring portion arranged around the second coil head assembly, the first and second chambers being in fluid communication with one another by the notches, one among the first and second chambers being a coolant inlet chamber and the other among the first and second chambers being a coolant discharge chamber such that

Abstract: A stator of an electric machine includes: a laminated stator core having sheet-metal blanks, which have slots; and stator windings, which are arranged in the slots of the laminated stator core together with slot insulation, such that, within the slots, a respective slot insulation is positioned between the sheet-metal blanks and the stator windings in order to electrically insulate the stator windings from a sheet-metal material of the sheet-metal blanks, and such that, when viewed in an axial direction, the stator windings protrude from the slots, project laterally with respect to the laminated stator core, and form winding overhangs laterally adjacent to the laminated stator core. When viewed in a radial direction, coolant flow channels are formed radially on an inside and/or radially on an outside, directly adjacent to the slots accommodating the stator windings. The stator windings accommodated in the slots of the laminated stator core are impregnated.

Abstract: The invention relates to a cooling-element part for a cooling element for cooling at least one component of an electrical drive unit of a motor vehicle and can be joined together with a further cooling-element part to form at least one cooling-fluid-carrying cooling duct to the cooling element, and which has a cooling structure configured to increase a flow resistance for the cooling fluid by producing turbulences in the flow having pins that extend at least partially over a height of the cooling duct, wherein the pins are formed as droplet-shaped having a width that decreases in the direction of the flow of the cooling fluid.

Abstract: A rotating electric machine includes a field element and an armature. The field element includes a magnet portion that includes a plurality of magnets arranged in an array in a circumferential direction. In the magnet, an easy axis of magnetization is oriented in a circular arc shape such that, on a d-axis side closer to a d-axis that is a magnetic pole center, the orientation of the easy axis of magnetization is parallel to the d-axis compared to a q-axis side closer to a q-axis that is a magnetic pole boundary, and a circular-arc-shaped magnet magnetic path is formed along the easy axis of magnetization. The magnet is formed into a circular arc shape when viewed from an axial direction of the rotor, and is provided with a first reference surface that is a planar surface and a second reference surface that is parallel to the first reference surface.

Abstract: A power tool with a combined printed circuit board (PCB) having a doughnut shape and located coaxially with a motor shaft. The combined PCB is secured to a heat sink on one end of the motor and a metal end piece is positioned on an opposite end of the motor. The metal end cap and heat sink are secured to one another via fasteners to provide a rigid coupling. A tabbed end piece is provided between the heat sink and the motor stator and is also secured into place via the fasteners. The tabbed end piece includes wire support tabs that provide strain relief to motor coil leads. The wire support tabs extend axially from circumferential locations of the tabbed end piece and include channels to guide the motor coil leads to solder contact points on the combined PCB.

Abstract: A rotary electric machine rotor includes a rotor core and a core support member that supports the rotor core. The core support member includes a tubular portion formed in a tubular shape and a support portion supported so as to be rotatable with respect to a non-rotary member to support the tubular portion from the inner side in a radial direction. The core support member is formed such that a diameter of a fitting surface portion in a specific region, which includes an overlapping region which overlaps a connection region as viewed in the radial direction, is smaller than a diameter of the fitting surface portion in a general region which is a region other than the specific region.

Abstract: The present application relates to a cooling device, a motor, and a wind turbine set. The cooling device is integrated inside the motor and includes a housing extending along an axial direction of the motor, wherein the housing has a receiving cavity and an air inlet and an air outlet in communication with the receiving cavity, and the housing is in communication with an interior of the motor through the air inlet and in communication with the ventilation chambers at two axial ends of the motor through the air outlet; a heat exchanger located in the receiving cavity and provided close to the air outlet; and a circulation fan provided in the receiving cavity along the axial direction of the motor. The cooling device can realize a modular design of the cooling device, has a simple and compact structure, and occupies a small space.

Abstract: The present disclosure relates to a cooling system, an electric motor and a wind-power electric generator set. The cooling system is applied to an electric motor; the electric motor includes a stator support and a rotor support; the stator support is dynamically sealingly connected to the rotor support to form a ventilation chamber arranged at an end of the electric motor in an axial direction; the cooling system includes a flow-confluence chamber, arranged in a circumferential direction of the stator support; an accommodating chamber, arranged in the circumferential direction of the stator support; a heat exchanger, arranged in the accommodating chamber or in the flow-confluence chamber; a circulating fan, arranged in the circumferential direction of the stator support and located at a side of the stator support in the axial direction.

Abstract: An electric transmission for an electric lawnmower is disclosed. The electric transmission is adapted to operatively connect to a plurality of wheels for driving the electric lawnmower over a ground surface. The electric transmission includes an electric motor and a housing encasing the electric motor. The housing includes a cylindrical body defining a chamber for receiving the electric motor, an inlet conduit, and an outlet conduit. The inlet conduit is connected to the cylindrical body and extends outwardly from the cylindrical body to facilitate a flow of air inside the chamber. The outlet conduit is disposed spaced apart from the inlet conduit. Further, the outlet conduit is connected to the cylindrical body and extends outwardly from the cylindrical body to facilitate an exit of air from the chamber to an ambient.

Abstract: The invention specifies an electrical machine (1, 1a . . . 1c) which comprises a housing (8), a stator (5) which is arranged in the housing (8) and a rotor (3) which is rotatably mounted in the housing (8). At least one first coolant duct (9) of a first cooling circuit (15) and at least one second coolant duct (10, 10a, 10b) of a second cooling circuit (16) are arranged in the region of the stator (5) in the housing (8). In this case, the coolant ducts (9, 10, 10a, 10b) and the housing (8) form a heat exchanger between the first cooling circuit (15) and the second cooling circuit (16). In addition, the invention specifies a gear motor comprising the electrical machine (1, 1a . . . 1c), in which gear motor the transmission is hydraulically connected to the at least one second coolant duct (10, 10a, 10b) of the second cooling circuit (16). The invention also specifies a vehicle (27) which is driven by the said electrical machine (1, 1a . . . 1c) or by the said gear motor.

Abstract: The rotating electric machine (1) having a housing comprising first (14) and second (15) clamp members and an inner face, a stator comprising a stator body (41) clamped between the first and second clamp members and having an outer face extending opposite the inner face together defining an annular cooling chamber (21) surrounding the stator body, the stator body comprising a longitudinal stack of stator sheets (410), each stator pack of which comprises an annular core having an outer circumference and at least two radially centrifugal protuberances projecting from the outer circumference of the annular core, in the annular cooling chamber, and diametrically opposite one another, the stator sheets of the longitudinal stack being identical and two adjacent stator sheet of the longitudinal stack being angularly offset from each other such that the respective protuberances thereof do not extend opposite one another.

Abstract: A stator includes a plurality of same laminations each defining a piloting tab on a perimeter thereof, and stacked to form a stator body and such that the piloting tabs define at least two axially extending serrated edge portions spaced apart from one another around a perimeter of the stator body or at least two sets of axially aligned housing contact pads spaced apart from one another around the perimeter.

Abstract: In an electric power steering device in which a control unit and a motor are integrated, when the control unit is housed in a case, although a frame, by which the motor and the control unit are compartmentalized, is required, there have been problems in that the case is deformed by a pressure which influences the case when the frame is provided, and a position accuracy of a shaft center of a rotation shaft of the motor is worsened. Therefore, in order to reduce a deformation of the case, a step portion is provided at an inner wall surface of the case and the frame is contacted to the step portion, and moreover, a connecting portion is provided between an outer circumference portion of the frame and an inner circumference portion of the case, whereby a movement of the frame is restrained.

Abstract: A linear motor including a stator assembly, an armature mechanically coupleable to a test specimen configured to be moved relative to the stator assembly by operation of the linear motor, and a suspension system configured facilitate movement of the armature relative to the stator assembly along an axis of movement without physically touching the armature during movement. Further disclosed is a multi-phase linear motor, a linear motor having an armature with an array of flat magnets, and a linear motor having a magnetic damping system.

Abstract: The present invention relates to an improved structure of a core-bobbin assembly without using a support ring, an O-ring, and a gasket which support and cool the core-bobbin assembly of a motor for a vehicle, so that a weight decreases, and a heat transfer area increases. The present invention also relates to a motor cooling method using the same. In the present invention, an outer circumference sheath (210) is added to a bobbin to cover an entirety of a core outer circumferential portion (110) including a cooling surface press-inserted into and in contact with a housing, that is, a recessed outer circumferential surface (120) formed on the core outer circumferential portion (110).

Abstract: In a first aspect of the invention there is provided a generator for a wind turbine defining a central generator axis. The generator includes a stator support frame and an environmental conditioning module removably attached to the stator support frame. The environmental conditioning module includes a heat exchanger and an air mover supported by a module housing. The environmental conditioning module further includes fluid interface connections associated with the heat exchanger, the fluid interface connections being releasably connectable to a fluid supply system associated with the heat exchanger, and electrical interface connections associated with the air blower, the electrical interface connections being releasably connectable to an electrical supply system associated with the air mover.

Abstract: An engine system includes an engine duct and a tail cone arranged radially inwardly of the engine duct. The tail cone has an outer surface and an inner surface. A generator housing is arranged in the tail cone. The generator housing includes an outer surface portion spaced from the inner surface of the tail cone. A generator is mounted in the generator housing. An air duct extends from the generator, through the generator housing, through the tail cone, and through the engine duct. The air duct includes an opening exposed to an air stream passing over the engine duct.

Abstract: A stator for an electric machine of a motor vehicle includes a laminated core having an inner side with winding grooves and an outer side. Windings, which are arranged in the winding grooves, form winding heads on axially opposing front faces of the laminated core. A cooling jacket conducts cooling fluid and has a first metal sheet which forms an inner wall of the cooling jacket facing the laminated core, and a second metal sheet which forms an outer wall of the cooling jacket surrounding the inner wall. An axial height of the cooling jacket exceeds an axial height of the laminated core. The cooling jacket has a laminated-core cooling jacket region for encasing the laminated core and two axially opposing winding-head cooling jacket regions adjoining the laminated-core cooling jacket region for encasing the winding heads.

Abstract: An electric motor includes a rotor, a stator assembly, and a plurality of heat dissipation members fixed to the stator assembly and to release heat of the stator assembly.

Abstract: A gyroscopic roll stabilizer comprises a gimbal having a support frame and enclosure configured to maintain a below-ambient pressure, a flywheel assembly including a flywheel and flywheel shaft, one or more bearings for rotatably mounting the flywheel inside the enclosure, a motor for rotating the flywheel, and bearing cooling system for cooling the bearings supporting the flywheel. The bearing cooling system enables heat generated by the bearings to be transferred through the flywheel shaft to a heat sink disposed within a cavity in the end of the flywheel shaft, or to a liquid coolant circulating within the cavity.

Abstract: A power tool with a combined printed circuit board (PCB) having a doughnut shape and located coaxially with a motor shaft. The combined PCB is secured to a heat sink on one end of the motor and a metal end piece is positioned on an opposite end of the motor. The metal end cap and heat sink are secured to one another via fasteners to provide a rigid coupling. A tabbed end piece is provided between the heat sink and the motor stator and is also secured into place via the fasteners. The tabbed end piece includes wire support tabs that provide strain relief to motor coil leads. The wire support tabs extend axially from circumferential locations of the tabbed end piece and include channels to guide the motor coil leads to solder contact points on the combined PCB.