Abstract: An electric machine includes a stator having a stator bore and a stator winding. The stator winding is arranged to one of receive an electrical current and produce an electrical current having a power between 1 MW and 50 MW. The stator has a stator current density of greater than 5 A/mm2. A rotor is at least partially disposed within the stator bore and has a rotor winding. The rotor has a rotor current density of greater than 5 A/mm2. A high-pressure cooling system is operable to actively cool the stator and the rotor. The rotor winding and the stator winding interact to one of produce rotation of the rotor to drive a connected device in response to the receipt of the electrical current and produce the electrical current in response to rotation of the rotor driven by the connected device.

Abstract: A radial flux electric motor includes a stator having a radially inner stator surface and a rotor mounted inside the stator. The rotor defines a rotational axis and has axially opposite rotor ends and a radially outer rotor surface positioned proximate the radially inner stator surface, thereby establishing an airgap therebetween. The rotor also includes a fluid circulation arrangement having at least one fluid channel extending through the rotor to the radially outer rotor surface and configured to receive a liquid via a first passage and a gas via at least one second passage. The fluid circulation arrangement is also configured to direct the liquid and the gas, via centrifugal force, into the airgap as the rotor rotates inside the stator sufficiently to discharge the liquid and the gas out of the airgap at the axially opposite ends of the rotor, thereby cooling the electric motor.

Abstract: An apparatus is provided for a powerplant. The apparatus includes a heat pipe extending axially along an axis from a first end of the heat pipe to a second end of the heat pipe. The heat pipe extends circumferentially around the axis. The heat pipe includes an evaporator region, a condenser region and a plurality of fluid passages. The evaporator region is disposed at the second end of the heat pipe. The condenser region is disposed at the first end of the heat pipe. The condenser region is disposed radially inboard of the evaporator region. The fluid passages are axially between and fluidly couple the evaporator region and the condenser region.

Abstract: An electrical converter includes an inverter configured to provide at least one input AC voltage from an input DC voltage. The electrical converter further includes an AC-to-AC voltage converter configured to provide an output AC voltage from the at least one input AC voltage such that the output AC voltage has an amplitude that depends on a frequency of the at least one input AC voltage. A rectifier designed is configured to provide an output DC voltage from the output AC voltage.

Abstract: An integrally-formed multi-property monolithic stainless steel component, a method of fabricating a multi-property monolithic stainless steel component, and a system for fabricating a multi-property monolithic stainless steel component. The integrally-formed monolithic stainless steel component includes, along a longitudinal direction thereof, one or more non-magnetic regions having an austenitic crystalline grain structure and one or more magnetic regions having a ferritic martensitic crystalline grain structure. The integrally-formed multi-property monolithic stainless steel component is fabricated by a selective laser sintering (SLS) assembly having integrated therein a plurality of sub-assembly components, including a selective powder deposition component, a selective laser sintering (SLS) component, and a localized cooling component.

Abstract: A turbomachine includes a rotating group with a wheel supported on a shaft. The turbomachine includes a housing that houses the wheel for rotation therein about an axis of rotation. The turbomachine 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. Furthermore, the turbomachine includes a controller configured for control of the e-machine. The controller has a bus bar member that includes a bus bar that is partly covered over by an electrically-insulative covering member. The bus bar includes a thermal terminal surface that is exposed from the covering member. The controller includes a heat sink member, wherein the thermal terminal surface is thermally connected to the heat sink member with the heat sink member configured to receive heat from the bus bar member.

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 ventilation chambers respectively arranged at two ends of the electric motor in an axial direction, first ventilation holes are formed at two ends of the stator support in the axial direction respectively, and 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 work machine (1; 201) includes: a motor housing (6; 212) having a tube part (6C; 212C) and a bottom part (6M; 212M); a brushless motor (5; 228) having a stator (20), which has a first contact surface (58F; 258F), and a rotor (21; 231) disposed in the stator; a baffle plate (25; 285); and an output shaft (31; 292). The stator includes a tube-shaped stator core (50) having a ring-shaped second contact surface (50S; 250S) that is opposite of the first contact surface, and coils (56; 256) wound on the stator core. The stator is held by the motor housing with the first contact surface in contact with the bottom part. A protruding part (25S; 285S) of the baffle plate contacts the entire circumference of the second contact surface of the stator core and is fixed to the motor housing by three or more screws (68; 288).

Abstract: A wire harness including: a first conductive path; a second conductive path that is different from the first conductive path; and an exterior cover that covers the first conductive path and the second conductive path, wherein: the first conductive path includes a conductive first tubular conductor that is tubular in shape, the second conductive path includes a conductive second tubular conductor that is tubular in shape, and a thickness of the first tubular conductor is different from a thickness of the second tubular conductor.

Abstract: A Permanent Magnet Synchronous Motor (PMSM) includes a hollow cylindrical stator with stator windings and a magnetic rotor having M pole pairs arranged to rotate around a rotational axis in the stator by a rotor shaft. The stator windings are energized to generate a magnetic rotational field in dependence upon the rotational position of the magnetic rotor. Two or more analog magnetic flux sensors are positioned within the hollow cylindrical stator and arranged concentrically with respect to the rotational axis around the stator at a constant mechanical angle equal to a constant electrical angle divided by M relative to each other.

Abstract: The invention relates to a drive device (1) for an aircraft, comprising: an electric machine (2) with a stator (3) and a rotor (4) and a cooling device (10) for cooling the electric machine (2), the cooling device (10) having an encapsulated first cooling region (12), in which a first cooling liquid for cooling the stator (3) and/or the rotor (4) is disposed, the cooling device (10) having a second cooling region (15), which is separate from the first cooling region (12) and in which the second liquid is disposed, and the cooling device (10) having an internal heat exchanger (11) for transmitting heat from the first cooling liquid to the second cooling liquid.

Abstract: A generator air gap baffle train assembly includes linearly aligned baffle segments, linearly aligned wedge blocks, and a tensioning rod. Each baffle segment includes a radially outer portion having an outer surface to interface with the axial slot and a side surface angled with respect to the outer surface and an axially aligned first thru bore and a radially inner portion which projects into an air gap. A pair of wedge blocks are positioned on opposing sides of the radially outer portion, each wedge block including a side surface that interfaces with the side surface of the radially outer portion so that the interfacing surfaces are in abutting contact and an outer surface that interfaces with the axial slot and a second thru bore axially aligned with the first thru bore of each baffle segment. The tensioning rod is enclosed by a non-conducting hollow tube spanning between adjacent baffle segments.

Abstract: A motor includes a rotor including a shaft extending in an axial direction, a stator surrounding a radially outer portion of the rotor, a support into which the conductor is inserted, the support being made of an insulating material, and a holder including through holes to hold the support, in which the support includes the first and second protuberances at least a portion of which is located in the through hole, the first and second protuberances being provided at intervals, and a base portion connecting the first and second, protuberances, and in which at least a portion of each of facing regions of a side surface of the first protuberance is close to the holder, and the second protuberance has a clearance with respect to the holder.

Abstract: The present application provides a radial counter flow jet gas cooling system for a rotor of a dynamoelectric machine. The radial counter flow jet gas cooling system may include a centering pin, a number of axial inlet ducts, a number of radial outlet ducts in communication with the axial inlet ducts, an axial subslot positioned about the axial inlet ducts, and a radial counter flow duct in communication with the axial subslot and extending along the centering pin.

Abstract: A stator core or a rotor core for an electrical machine, the core including a plurality of teeth separated by slots in a circumferential direction of the core, and a plurality of lamination stacks arranged one after another in an axial direction of the core, and separated from each other in the axial direction by cooling ducts. Each lamination stack includes at its each end in the axial direction at least one slit tooth section providing a discontinuity in the electrical conductivity of the lamination material and thereby reducing eddy current losses at the respective slit tooth section, and between the slit tooth sections at least one regular tooth section.

Abstract: A rotary electric machine includes a rotor that rotates integrally with a rotary shaft and a stator disposed outside the rotor in a radial direction. In the stator, a coil is wound on a stator core, and a coil end of the coil exposed to an outside from an end portion of the stator core is cooled by a liquid coolant. The rotary electric machine further includes a coil end cover formed of an insulating material and configured to cover at least an outer circumference of an upper region of the coil end. A liquid coolant passage through which a liquid coolant flows toward a coil end is provided in the coil end cover.

Abstract: This disclosure details cooling systems for cooling electric components, such as electric machines, within electrified vehicles. Exemplary cooling systems may include a spray bar positioned relative to a rear face of a stator of the electric machine. In some embodiments, the spray bar may be positioned axially between the rear face of the stator and a torque converter housing. One or more nozzles of the spray bar are configured to direct a coolant between adjacent back irons of the stator, onto end windings of the stator, or both. Actively cooling the stator allows the electric machine to operate at higher torques and speeds, thereby increasing performance.

Abstract: The invention relates to an electric machine with a stator (1), with a rotor and with multiple machine coils (3). The electrical machine comprises a cooling device, which is suitable for cooling a superconducting material to at least below a transition temperature. Windings (4) of at least two machine coils (3) consist of the superconducting material and are assigned to different winding groups. The windings (4) are operatively connected with the cooling device, in order to cool the windings (4) to below the transition temperature. The electrical machine comprises an open-loop or closed-loop controlled power supply device, electrically conductively connected with the windings (4), for the supply of electrical power and controlling of the machine coils (2). At least two winding groups are each electrically-conductively connected with a separate, open-loop or closed-loop controlled power output stage (6) of the power supply device.

Abstract: A cooling device and a motor are provided. The cooling device that cools a heating element is provided with: a cooling chamber for cooling the heating element with a first cooling medium; a radiator chamber for releasing the heat of the first cooling medium to the outside; and a first connection path and a second connection path for connecting the cooling chamber and the radiator chamber. When part of the first cooling medium in the cooling chamber is gasified, at least part of the gasified first cooling medium moves into the first connection path, thus causing a circulation in which the first cooling medium in the cooling chamber flows into the radiator chamber via the first connection path, and the first cooling medium in the radiator chamber flows into the cooling chamber via the second connection path.

Abstract: An electric generator has a rotor shaft to be driven to rotate with a generator rotor. A generator stator is positioned adjacent the generator rotor. A housing surrounds the generator rotor and the generator stator. The generator rotor shaft extends outwardly of the housing. A seal seals a location where the rotor shaft extends outwardly of the housing. A vent valve is configured to vent of the interior of the housing when the rotor shaft is not rotating. An electrical assembly is also disclosed. An electrical assembly is also disclosed.

Abstract: A shaft seal device mounted rotating electrical machine includes; a rotating electrical machine which includes a rotating shaft equipped with a shaft seal device having an inlet portion and an outlet portion of seal oil, a main oil tank in which the seal oil supplied to the shaft seal device is stored, a seal oil cleanup tank which includes an inlet portion connected to an outlet portion of the main oil tank, and has an oil level regulating valve, a degassing pump which includes an inlet portion connected to an outlet portion of the seal oil cleanup tank, a pressure regulating valve which is disposed between the outlet portion of the seal oil cleanup tank and an outlet portion of the degassing pump, a differential pressure control valve which is disposed between the outlet portion of the degassing pump and the inlet portion of the shaft seal device.

Abstract: A baffle train for turbine generator air baffles independently aligns axial position of the composite air baffle along a stator core bore axial slot. Air baffle sectors that form the composite air baffle are coupled to baffle blocks of the baffle train. The baffle blocks are positioned axially along at least one axial spacer rod corresponding to the desired position of the composite air baffle within the stator bore. The baffle blocks are locked into position by a locking engagement member. Wedge blocks are axially spaced on a reciprocating wedge block rod within the stator slot below the baffle blocks. A biasing element, such as arched leaf spring, tensions the baffle block radially inwardly toward the stator bore when the wedge blocks are reciprocated below the baffle blocks.

Abstract: A variable pressure electric generator, including a gas cooled rotor arranged along a centerline of the generator; a gas cooled core arranged coaxially and surrounding the rotor; a plurality of coils arranged within the core; a stator frame arranged to fixedly support the core and rotationally support the rotor; a gas cooling system that circulates a cooling gas within the generator; a pressurizing system that operatively pressurizes the cooling medium to a maximum pressure of 2 bar relative to atmospheric pressure, wherein the pressurizing system continuously determines the cooling medium pressure based upon operational requirements; and a low pressure frame that surrounds a plurality of the rotor and an entirety of the core and stator windings, the frame configured to operatively contain an internal pressure of 2 bar relative to atmospheric pressure.

Abstract: Described is a large, thin frame gas cooled electric generator for power generation, having a gas cooled rotor arranged along a centerline of the generator; a gas cooled core arranged coaxially and surrounding the rotor; a plurality of coils arranged within the core; a support frame arranged to fixedly support the core and rotationally support the rotor; a gas cooling system that circulates a cooling gas within the generator; a pressurizing system that variably pressurizes the cooling medium to a maximum pressure of one bar relative to atmospheric pressure; and a pressure boundary member that surrounds a plurality of the rotor and an entirety of the core and stator windings, the frame configured to operatively contain an internal cooling medium pressure of 2 bar relative to atmospheric pressure.

Abstract: Heat pump configurations that provide continuous heat transfer capabilities without any need for electricity. The overall system includes a rotatable hourglass structure situated within a sphere or ovoid container with internal tracks aligned with wheels on the hourglass. With a heat collection component situated on the underside of the container, the rotatable hourglass, being constructed of suitable heat transfer materials, absorb the collected heat in the lower portion of the container, thereby causing the air present therein to expand, forcing a plunger upward from one hourglass chamber to the other. The plunger effectuates operation of a magnetic switch to release the hourglass to rotate and then oscillate from one position to another until the heat collection operation discontinues. With a coolant introduced within the heated chamber (and drawn through pressure differential), heat can be transferred thereto. The heated coolant is then transferred to a reservoir for future utilization.

Abstract: Systems, operations, management and monitoring of controlling and managing power source performance by providing an operating power source device and providing one or more sensors to monitor operation of the power source device. Operational data of the power source device is collected via the one or more sensors and stored to both a local and remote database. The collected operational data is analyzed to detect and identify any operational errors of the power source device, as well as obtaining external and/or internal operating conditions of the operating power source device. Any identified operational errors of the power source device are corrected for using at least the external and/or internal operating conditions.

Abstract: A stator portion includes a stator and a bus bar member. The stator includes three coil groups, each coil group includes two or more coils defined by a single conducting wire including a jumper wire. The bus bar member includes three first bus bars to which end portions on one side of the conducting wires of the three coil groups are connected, each of which includes an external connection terminal, a second bus bar defining a neutral point to which end portions on the other side of the conducting wires are connected, and a resin holder which retains the three first bus bars and the second bus bar. The three first bus bars and the second bus bar overlap only in a radial direction centered on the central axis or an axial direction, and the maximum number of bus bars which overlap is 2.

Abstract: A liquid-cooled rotary electric machine including jacket defining a heat transfer surface in conductive thermal communication with a stator and having an axial end portion partially enclosing an interior volume. A heat source is in conductive thermal communication with a wall of the jacket axial end portion. A fluid channel traverses the heat transfer surface between opposite axial ends of the jacket, and a fluid passage in fluid communication with the fluid channel is defined by jacket axial end portion walls. A flow path of liquid coolant through the machine is defined by the fluid channel and the fluid passage between a machine coolant inlet and outlet, whereby at least a portion of heat transferable between the heat source and the fluid passage is convectively transferable between the jacket axial end portion walls and liquid coolant along the flow path. Also a method for liquid-cooling a rotary electric machine.

Abstract: An electro-dynamic machine has a rotor and stator with a gap therebetween. The machine has a frame defining a hollow interior with end cavities on axially opposite ends of the frame. A gas circulating system has an inlet that supplies high pressure gas to the frame interior and an outlet to collect gas passing therethrough. A liquid coolant circulating system has an inlet that supplies coolant to the frame interior and an outlet that collects coolant passing therethrough. The coolant inlet and gas inlet are generally located on the frame in a manner to allow coolant from the coolant inlet to flow with gas from the gas inlet to the gap. The coolant outlet and gas outlet are generally located on the frame in a manner to allow the coolant to be separated from the gas with the separated coolant and gas collected for circulation through their respective circulating systems.

Abstract: A method for cooling a compressor motor (170) and a cooling circuit utilizing refrigerant that originates in the condenser (30) to cool a motor (170) and electromagnetic bearings (196, 206). The motor drives a compressor (20), while the electromagnetic bearings support the motor rotor (178) during operation of the compressor. Liquid refrigerant from the condenser is expanded into a two-phase mixture, passed over the stator, expanded a second time, passed over the bearings and between the stator and rotor, before being returned to an evaporator (50).

Abstract: An electromagnetic machine stator has a common pole and a plurality of excitation poles. Each excitation pole has a coil wound around it for inducing a magnetic flux through the excitation pole. The common pole that does not have a coil wound around it for inducing a magnetic flux. A flux barrier, disposed within the common pole, inhibits the flow of flux from one part of the common pole across the flux barrier to another part of the common pole. The flux barrier is less conducive to the flow of flux than is the common pole.

Abstract: A system for cooling an electrical machine is disclosed. The electrical machine includes a rotor, a stator, and at least one cooling pathway extending through the stator. During operation of the electrical machine, fluid flows through the pathway and carries away heat generated by the electrical machine.

Abstract: A connection arrangement is provided for the windings of an electric machine and includes a plurality of phase connections, each phase connection including conductors, each conductor having an annular or annular sector shape and includes a plurality of connecting ends. The conductors of each phase connection are radially shifted.

Abstract: An electrical generator is provided.

Abstract: A stator arrangement for an electrical machine includes a stator having a stator stack consisting of a plurality of axially adjacently disposed metal plates. The arrangement further includes a cooling device in the shape of at least one heat pipe. The at least one radial channel extends between respective axially adjacently disposed metal plates, wherein the at least one heat pipe is located within the at least one radial channel.

Abstract: Various embodiments include apparatuses adapted to include a dynamoelectric machine rotor with a modified outer surface. In some embodiments apparatuses include a dynamoelectric machine rotor including a rotor body having a spindle, pole regions, the pole regions having a non-uniform radial distance from an axis of rotation of the rotor to an outer surface of the pole regions and a plurality of slots in the outer surface of the rotor body, the plurality of slots being spaced apart in a circumferential direction of the rotor body, each of the plurality of slots extending in an axial direction of the rotor body.

Abstract: A superconducting rotating machine having a cooler for a rotator is provided. The superconducting rotating machine includes a rotator wound with a superconducting coil, a stator enclosing the rotator and separated therefrom by a predetermined gap, the cooler having a cold head directly attached to the rotator and at least one compressor connected with the cold head, and a flexible coupling disposed between the cold head and the compressor and enabling a cryogenic refrigerant to flow therein. The cold head is directly connected to the rotator, and the cold head and the compressor are driven using the flexible coupling, so that it is possible to prevent vibration of the compressor and enhance cooling efficiency by thermally separating the cryogenic cold head from the compressor.

Abstract: A sealed electric generator includes a casing (2) housing a stator (3) and a rotor (4) connected to a shaft (5), wherein the shaft (5) is provided with a duct housing and a lead (10) carrying electric power from an exciter (8) to rotor field windings (9). The duct has a sealing unit for preventing gas contained inside of the casing (2) from reaching the exciter (8). The sealing unit has first and second seals (20, 21) defining between them a chamber (22), such that gas that leaks past a seal (20, 21) enters the chamber (22).

Abstract: A radial vent composite heat pipe system for cooling and increasing the power density of an electrical machine is provided. The system comprises a plurality of radial vent composite heat pipe assemblies each comprising a slot portion thermally connected to a vent portion. The slot portions are disposable within respective stator slots of a stator core pack of a stator assembly of the electrical machine. The vent portions are disposable within stator vents of the stator assembly. The slot portions absorb heat from the stator coils of the stator assembly and transfer the absorbed heat to the vent portions. The vent portions reject the transferred heat into a cooling air flowing through the respective stator vent, thereby rapidly transferring heat from the respective stator coil to the cooling air flowing through stator vent, and thereby greatly increasing the power density of the electrical machine.

Abstract: An electric generator incorporated into a hybrid vehicle including an engine and an electric drive motor and actuated by the engine, comprises a rotor mounted to one end portion of a crankshaft of the engine such that the rotor is rotatable integrally with the crankshaft; a cylindrical accommodating member surrounding an outer periphery of the rotor; and an air outlet provided on a peripheral wall portion of the accommodating member such that the air outlet opens in the vicinity of the outer periphery of the rotor and is tilted in a forward direction of a rotational direction of the rotor and in a radially outward direction.

Abstract: The invention refers to a direct drive electric generator for a wind turbine provided with rotor salient poles and a ladder-like cryostat for housing superconductive coils and keeping them at a cryogenic temperature while the interior of the cryostat is kept free of coolant. The invention achieves optimal thermal insulation of the coils without the need of a continuous re-filling of the cryostat and ensuring a good distribution of the magnetic field avoiding the use of expensive materials.

Abstract: A super conducting synchronous machine including a rotor which may rotate in relation to a stator and which has at least one super-conducting winding which is cooled my means of a cooling machine is provided. The cooled areas of the rotor are surrounded at least partially by a vacuum chamber rotating with the rotor. A pump line connecting the vacuum chamber to a vacuum pump is provided in a connection area produced by means of at least two rotational seals, fixed in relation to a rotor and defining the vacuum chamber.

Abstract: Various embodiments of the invention include systems, computer program products, and related methods for managing the purging of a hydrogen-cooled dynamoelectric machine. In various embodiments, a system is disclosed including at least one computing device configured to perform the following: obtain an indication of a fault in an alternating current (AC) power supply to a hydrogen-cooled dynamoelectric machine system; determine a reserve power characteristic of a reserve energy storage device in response to obtaining the indication of the fault in the AC power supply; and extend a pre-purge cycle for the hydrogen-cooled dynamoelectric machine system based upon the reserve power characteristic of the reserve energy storage device.

Abstract: An example generator cooling arrangement includes an electrochemical hydrogen pump configured to receive and adjust a fluid containing hydrogen and to provide a refined supply of hydrogen. An electric power generator receives the supply of hydrogen. The refined supply of hydrogen is used to remove thermal energy from the electric power generator.

Abstract: A hydrogen cooled generator assembly includes a hydrogen cooled generator and a fundament, wherein the generator is mounted on the fundament, and wherein the fundament includes at least one cavity underneath the generator. The at least one cavity includes at least one terminal box disposed adjacent to the generator and extending downward from the generator for collection of a plurality of electrical links from the generator; at least one collection box disposed beneath the at least one terminal box having a top wall and a first and a second side wall and configured to guide the plurality of electrical links from the at least one terminal box in a further downward direction; a lateral space; and a seal plate covering the lateral space at an upper end of the lateral space.

Abstract: An inverter-integrated electric compressor is structured to include a suction refrigeration path (61) for intensively flowing a sucked refrigerant (30) therethrough, such that the suction refrigerant path (61) is provided only in the vicinity of a switching device module (105), which is a main heat source in an inverter device portion (101), so that the sucked refrigerant is concentrated in only the vicinity of the switching device module, which is the main heat source in the inverter device portion. This enables effectively cooling the inverter device portion, with the sucked refrigerant, without involving adjustments of operating conditions for a refrigeration cycle.

Abstract: Provided are a rotor core, a method for cooling a rotor core, and a superconducting rotating machine, capable of effectively and uniformly cooling superconducting coils without causing cold brittleness in an extremely low temperature. The rotor core 10, which is made of a substantially hollow cylindrical member of nonmagnetic material, has a cylindrical cavity 13 defined therein and extending in the longitudinal axis of the member. Helium gas 300 is delivered in the rotor core 10 from the proximal to distal sides and vice versa, which ensures a uniform cooling of the rotor core 10. This also ensures a uniform and effective cooling of the superconducting coils.

Abstract: Methods and systems for reducing a flow of ambient air into a bearing lubricating oil system are provided. The system includes a lubricating oil bearing cover that is stationary with respect to the bearing wherein the bearing is configured to support a portion of a rotatable machine shaft. The cover includes a first end cap extending radially inwardly towards the shaft such that a cavity surrounding the bearing is formed by the cover and the first end cap and a set of seal rings positioned substantially concentric with the shaft and forming a seal against lubricating oil flow. The seal rings include a plurality of wire bristles extending radially inwardly from the end cap wherein the wire bristles are configured to extend to a surface of the shaft when assembled and the bristles are configured to present a tortuous flow path to gas infiltrating the cavity.

Abstract: According to one embodiment, in a high-voltage bushing of a rotating electric machine, the communicating holes are inclined at least toward a circumferential direction of the hollow conductor or toward a machine external side from a direction vertical to a wall surface of the hollow conductor.

Abstract: A wind turbine having a generator is provided. The generator includes a rotor and a stator having a stator lamination, one or more flange rings and one or more core rings. The stator lamination includes a plurality of axial flow passages and the one or more core rings include a plurality of core ring axial flow passages that are aligned with the plurality of axial flow passages in the stator lamination. The plurality of axial flow passages in the stator lamination have a substantially triangular cross-sectional shape.