Inventors list

Assignees list

Classification tree browser

Top 100 Inventors

Top 100 Assignees


Liquid coolant

Subclass of:

310 - Electrical generator or motor structure

310010000 - DYNAMOELECTRIC

310040000 - Rotary

310052000 - Cooling or fluid contact

Patent class list (only not empty are listed)

Deeper subclasses:

Entries
DocumentTitleDate
20120161555Rotating Electrical Machine - A rotating electrical machine includes: a stator that includes a stator core and a stator coil; a rotor that rotates with respect to the stator; a refrigerant supply port through which a cooling medium is supplied to a coil end protruding from the stator core; and a guide member, disposed along at least a part of the coil end, for causing the cooling medium supplied through the refrigerant supply port to flow along the coil end.06-28-2012
20090195092WINDING END TURN COOLING IN AN ELECTRIC MACHINE - Winding end turns in an electric machine are cooled by a coolant. Cooling is improved by redirecting the coolant generally tangentially through the winding end turns to improve heat transfer between coolant and windings.08-06-2009
20100013329Oil cooled electric drive module for hybrid vehicles - An oil cooled electric drive module for hybrid vehicles includes an AC motor assembly having a shaft parallel to an output shaft, with the shafts being interconnected by a set of helical reduction gears. The motor shaft is provided with a rotary union for cooling oil that passes first axially and then radially through the shaft to an outer circumferential surface thereof beneath the core of a rotor attached thereto. The cooling oil passes beneath the rotor to the outer ends thereof, where annular deflectors disburse the oil to provide a coanda effect over the shorting rings of the rotor, onto the stator windings, and thence onto the motor housing for return to a cooling sump, which may include hydraulic and electric pumps for further desired cooling circulation. The invention also includes solenoid valves for shifting a splined collar between positions of interconnection and disconnection between the motor shaft and output shaft. The module of the invention is adapted for interpositioning within the drive shaft of a motor vehicle, with the output shaft of the module being connected at opposite ends to the vehicle drive shaft.01-21-2010
20100164310Liquid cooled permanent magnet rotor - A permanent magnet rotor for an electrical generator includes a rotor shaft and a rotor core mounted coaxially upon the rotor shaft. The rotor core defines a plurality of longitudinal core passages which include a segment of a rotor cooling circuit, and further includes a permanent magnet outer core component mounted on an inner core component and including a plurality of permanent magnets. A cooling liquid containment mechanism for the permanent magnet rotor includes a first liquid containment cover coupled to the inner core component and a second liquid containment cover coupled to the inner core component. The liquid containment covers are configured to contain cooling liquid passed from an inlet segment of the rotor cooling circuit defined by the rotor shaft into the plurality of longitudinal core passages, and thenceforth into an outlet segment of the rotor cooling circuit also defined by the rotor shaft. The liquid containment covers are mounted on the inner core component at locations radially inward of a cylindrical outer surface thereof.07-01-2010
20130076166ELECTRIC MACHINE MODULE COOLING SYSTEM AND METHOD - Embodiments of the invention provide an electric machine module. The module can include a housing that can define a machine cavity. The sleeve member can include a first and a second axial end. The sleeve member can further include a first coolant jacket and a first seal element coupled to the sleeve member substantially adjacent to the first axial end to substantially seal at least a portion of the first coolant jacket. The sleeve member can include a second coolant jacket and a second seal element coupled to the sleeve member substantially adjacent to the second axial end to substantially seal at least a portion of the second coolant jacket. The module can include a stator assembly positioned within the machine cavity so that portions of the first and second coolant jackets substantially circumscribe portions of the stator assembly.03-28-2013
20130076168DYNAMOELECTRIC MACHINE HAVING AIR/LIQUID COOLING - A dynamoelectric machine includes a stator having a laminated core and a winding system, which forms winding heads on end faces of the stator, and a rotor having a laminated core and connected to a shaft in a rotationally fixed manner. The stator and the rotor are arranged in a housing, and the shaft is supported by bearings arranged in bearing shields. The laminated core of the stator and/or rotor has axially extending cooling channels. The bearing shields form with the housing a closed interior having at least one closed inner cooling circuit. The housing has an outer jacket and an inner jacket facing the stator and arranged at a distance from the outer jacket in some sections. The outer jacket and the inner jacket combined form a cooling jacket defined by an axial extension which equals at least the axial extension of the laminated core of the stator.03-28-2013
20130076167Cooling system and method for electronic machines - Embodiments of the invention provide an electric machine module including a housing. The housing can include a first and a second end cap. The first end cap can comprise a first and a second manifold and an inlet and outlet. The inlet and outlet can be in fluid communication with the first manifold and the second manifold, respectively. The second end cap can include a third manifold. The module can include an electric machine operatively coupled to the housing. The electric machine can include a stator assembly. The stator assembly can comprise at least one first and at last one second coolant member disposed within the stator assembly. The electric machine can be coupled to the housing so that the first coolant member can be in fluid communication with the first and third manifolds and the second coolant member can be in fluid communication with the second and third manifolds.03-28-2013
20090121563Liquid Cooled Rotor Assembly - A rotor assembly cooling system (05-14-2009
20090121562Device and method for cooling motor for hybrid electric vehicles - The present invention provides a device for cooling a motor for hybrid electric vehicles, which comprises: an oil pump mounted on an outer surface of the motor housing in such a fashion as to be disposed coaxially relative to the shaft; a cooling oil supply line mounted in such a fashion as to be extended to an inner surface of the spider from an outlet of the oil pump; and a cooling oil return line mounted in such a fashion as to interconnect a bottom portion of the motor housing in which cooling oil is filled and an inlet of the oil pump.05-14-2009
20100045125Rotary electric machine - A rotary electric machine having a stator including a coil; and a cooling unit that cools a coil end of the coil, which projects in an axial direction of the stator, wherein the cooling unit includes: an outer periphery cooling portion that is disposed along an outer peripheral surface of the coil end and includes a plurality of injection holes that inject a cooling medium onto the outer peripheral surface; and an end surface cooling portion that is disposed along an axial end surface of the coil end and includes a plurality of injection holes that inject the cooling medium onto the axial end surface.02-25-2010
20100102652Arrangement for cooling of an electrical machine - In one aspect, an arrangement for cooling of an electrical machine is provided. The arrangement includes a rotor and a stator of the electrical machine, while an air-gap is between the rotor and the stator. The electrical machine includes an air-cooling-arrangement, which circulates air inside the electrical machine. The electrical machine includes a liquid-cooling-arrangement, which circulates cooling-liquid inside the electrical machine. The air-cooling arrangement and the liquid-cooling-arrangement are connected by an air-to-liquid heat-exchanger, which is applied to transport heat out from the electrical machine by the cooling-liquid.04-29-2010
20100102649HYDROFORMED COOLING CHANNELS IN STATOR LAMINATIONS - A system for cooling an electrical machine is disclosed. The electrical machine includes a rotor, a stator, and at least one cooling tube extending through the stator. During operation of the electrical machine, fluid flows through the tube and carries away heat generated by the electrical machine.04-29-2010
20130043747Electric Machine Cooling - Embodiments of the invention provide an electric machine module including an electric machine. The electric machine includes a rotor and a stator assembly. The machine includes an output shaft having a longitudinal axis that is circumscribed by a portion of the rotor. The output shaft may comprise an output shaft channel and the rotor may comprise a rotor channel, and the rotor and the output shaft channels may be in fluid communication. The machine further includes a coolant jacket at least partially within a sleeve member that circumscribes at least a portion of the stator assembly, and at least one pump mounted generally concentrically with respect to the output shaft, that is in fluid communication with the coolant jacket. The pump may be internal to the machine, mounted at an interface between the inside and outside of the machine, or alternatively, it may be externally mounted.02-21-2013
20100026108ELECTRIC MOTOR WITH HEAT PIPES - A motor that includes a motor portion structured to house a stator and a rotor mounted to a shaft of the motor. The motor additionally includes a cooling portion disposed adjacent to the motor portion and separated from the motor portion by a structural interface. The cooling portion provides a cooling chamber structured to have a cooling fluid passed therethrough via a cooling fluid moving device that is structured to be coupled to and driven by the motor shaft. Furthermore, the motor includes a plurality of heat pipes having evaporator ends disposed within the motor portion and condenser ends disposed within the cooling chamber. During operation of the motor and cooling fluid moving device, the cooling fluid contacts the heat pipe condenser ends to extract heat from the condenser ends, hence cooling the evaporator ends of the heat pipes, thereby cooling the motor portion of the motor and the stator and rotor housed therein.02-04-2010
20100033038SYSTEM AND METHOD FOR COOLING AN ELECTRIC MOTOR - A cooling system is provided for an electric motor and comprises a rotor assembly, an intake assembly, and a first reservoir. The rotor assembly is coupled to and rotatable within a housing, and comprises a rotor having a first and second ends having a first plurality of veins extending therebetween, each vein having an inlet and an outlet. The rotor assembly also comprises a first manifold coupled to and rotatable with the first end of the rotor in fluid communication with the inlets of the first plurality of veins. The intake assembly is coupled to the housing and is in fluid communication with the first manifold. The first reservoir is configured to contain a motor coolant and is coupled to the housing for collecting the motor coolant from the outlets of the first plurality of veins, and for providing a source of motor coolant to the intake assembly.02-11-2010
20120181884ELECTRIC MACHINE HAVING AN INTEGRATED COOLANT LEVEL SENSOR - An electric machine includes a housing having a coolant collection area, a stator mounted within the housing, a rotor assembly rotatably mounted within the housing relative to the stator, and a coolant level sensor arranged at the coolant collection area. The coolant level sensor includes a sensing surface configured and disposed to detect a level of coolant collected in the coolant collection area.07-19-2012
20130049497GEAR-INTEGRATED ELECTRIC MOTOR AND ELECTRIC VEHICLE - A gear-integrated electric motor is provided with a motor (02-28-2013
20130088102ELECTRIC MACHINE MODULE - Embodiments of the invention provide an electric machine module including an electric machine positioned with a housing. The brushless electric machine includes a center axis of rotation and a support member coupled to the housing. The module also includes a cooling system, which includes an inlet disposed through a portion of the housing, a first channel positioned within the support member that fluidly connects a second channel with the inlet. The housing also includes a drain aperture and a drain guide disposed substantially adjacent to the drain aperture.04-11-2013
20130088103Synchronic Wind Turbine Generator - A synchronic generator comprises at least a stator and at least two windings placed opposite and parallel to its rotation axis and at least a refrigeration system. The design of this generator allows a better use of the space close to the external diameter of the generator, allowing a power increase and minimizing the weight without increasing the external diameter of the generator. Depending on wind conditions, one or both windings can work at the same time, which optimizes yield, versatility and reliability.04-11-2013
20130049496Electric Machine Module Cooling System and Method - Embodiments of the invention provide an electric machine module. The module can include a housing, which can define a machine cavity. In some embodiments, an electric machine can be positioned within the machine cavity. In some embodiments, the electric machine can include a stator assembly including potted stator end turns. An end turn member can be positioned within the machine cavity and can include a radially inward flange and a radially outward flange axially extending from a central region. The end turn member is configured and arranged so that the flanges are substantially adjacent the stator end turns. The end turn member can include at least one second member aperture disposed through a portion of the central region.02-28-2013
20100133930HYBRID DRIVE DEVICE - The hybrid drive device characterized in that: a case space (G06-03-2010
20130069456Electric Motor for Construction Machinery, and Cooling Circuit for Electric Motor - A cooling circuit for an electric motor for a construction machine includes a circulation line that includes a shaft-side line disposed in a rotor shaft of the electric motor, a pump that supplies cooling fluid to the circulation line, a first filter disposed between the pump and the shaft-side line in the circulation line, a first bypass line that bypasses the first filter so as to connect an upstream side and a downstream side of the first filter, and a first relief valve disposed in the first bypass line.03-21-2013
20130069455ELECTRIC MACHINE MODULE COOLING SYSTEM AND METHOD - Embodiments of the invention provide an electric machine module. The module can include a housing, which can define a machine cavity. In some embodiments, a stator assembly can be positioned within the machine cavity. In some embodiments a transfer member can substantially contact at least a portion of the stator end turns. The transfer member can be in thermal communication with some of the stator end turns and a portion of the housing. In some embodiments, the transfer member can include a substantially non-liquid first element and a substantially liquid second element.03-21-2013
20120217826COOLING DEVICE - A cooling device includes an inner sleeve with an outer surface, an outer sleeve surrounding the inner sleeve, and two end portions extending between the inner sleeve and the outer sleeve at the ends. The inner sleeve, the outer sleeve and the end portions define a peripheral space. A flow guiding structure defines N channels in the peripheral space for coolant to flow, where N is an integer equal to or greater than 1. Each channel has at least two branches, and N pairs of inlet and outlet corresponding to the N channels. The branches of each channel are in fluid communication with a respective pair of inlet and outlet. Each branch extends over a half circumferential part of the outer surface of the inner sleeve. An electric motor incorporating the cooling device is also provided.08-30-2012
20120217825VEHICLE DRIVE SYSTEM - A vehicle drive system includes a rotor support that is more radially inward than the stator and supports the rotor; a supply that supplies oil to the rotor support bearing, the rotor support bearing includes a discharge that discharges oil supplied from the supply, the rotor support includes an opposing surface that opposes the discharge-side surface, and an opposing extension surface that extends radially from the opposing surface. The stator includes a coil end that protrudes from the stator core toward the first axial direction. A radial outer end of the opposing extension surface is more radially inward than, and overlaps with, the coil end, with a radial space between the radial outer end and the coil end. The discharge-side surface is disposed more toward the second axial direction than the radial outer end of the opposing extension surface.08-30-2012
20120112569Magnetic Cap Element for a Stator of a Generator - A stator system for a generator, in particular a generator of a wind turbine is disclosed. The stator system includes a housing element including a groove and a cap element for closing the groove such that a channel for guiding a cooling fluid within the groove is formed. The cap element includes a magnetic material.05-10-2012
20120112570Water cooled electric machine - A plate for tightening a stator housing segment of an electric machine is disclosed. The plate is mountable to an axial front face of the stator housing segment. The plate includes a fluid channel formed in such a way that, when the plate is attached to the axial front face of the stator housing segment, the fluid channel connects an opening of a cooling channel within the stator housing segment with a supply system for cooling fluid.05-10-2012
20100102650Arrangement for cooling of an electrical machine - In one aspect, an arrangement is provided. An electrical machine includes elements generating heat while the electrical machine is at work. The elements include at least one fixing-arrangement to support an element-structure. The fixing-arrangement is hollow to carry a cooling fluid which allows a transfer of the heat away from the elements.04-29-2010
20110012448ELECTRIC MOTOR - An electric motor (01-20-2011
20110012447HYBRID CASCADING LUBRICATION AND COOLING SYSTEM - A hybrid cascading lubrication and cooling system (01-20-2011
20090009013Cast groove electric motor/generator cooling mechanism - An electric motor/generator cooling mechanism is presented. The cooling mechanism includes a hollow cooling jacket having an inner and outer coaxial surface, where the inner surface defines a generally cylindric cavity for receiving a stator in heat transference contact with the inner surface, and the outer surface has a cast spiral groove section with jogged cooling passages. The disclosure includes an outer case having one or more inlet ports, an outlet port, and a vent for purging air, cooling fluid flowingly encased between the cooling jacket and the outer case, flowing through the jogged cooling passages, and a flanged end surface on an end of the outer case for boltingly connecting the cooling jacket to the outer case.01-08-2009
20120062055COOLING STRUCTURE FOR ROTATING ELECTRIC MACHINE - A cooling structure for a rotating electric machine, having a coolant supply portion, and configured to supply a coolant to a coil end portion of a stator. A protrusion portion is provided on a portion of a coil end facing area, and projects toward the coil end portion side and extends downward and toward a radially inner side of the coil end portion, wherein the coil end facing area is a section that faces the coil end portion on an inner wall surface of a case that accommodates the stator. A collection portion collects the coolant distributed along the protrusion portion. A drip portion is disposed on the radially inner side of the coil end portion at a position that axially overlaps with the coil end portion as viewed from the radial direction, wherein the coolant collected in the collection portion drips from the drip portion.03-15-2012
20110285221Stator Winding Assembly and Method - An electrical device includes a plurality of stacked laminates that form a tubular stator portion, a cooling passage partially defined by orifices formed in the plurality of stacked laminates, a housing including a cavity further defining the cooling passage, the cooling passage defining a fluid flow path parallel to a rotational axis of the stator portion, a sump portion communicative with the cooling passage, the sump portion including a cavity defined by the stator portion and the housing member.11-24-2011
20090315416Motor with Heat Dissipation Arrangement - The motor with heat dissipation device includes a motor body, a housing covering the motor body, a cooling water tank and a pump. The housing is provided with a water outlet and a water inlet, which connect with the cooling water tank. The pump is arranged between the water inlet and cooling water tank. A water room is provided between the motor body and housing. The pump draws water from the cooling water tank and pushes it into the water room through the water inlet. The water in the water room absorbs heat of the motor body and goes back to the cooling water tank to finish a cycle.12-24-2009
20110278968Multi-Path Liquid Cooling Arrangement for Electric Machines - A multi-path liquid cooling arrangement for electric machines comprising a heat storing element provided with channels having a generally C-shaped cross-section and cooling tubes so configured and sized as to be insertable in the channels is described herein. The cooling tubes, once inserted in the channels are deformed to conform thereto, whereby heat stored in the heat storing element is extracted by circulating cooling fluid inside the cooling tubes.11-17-2011
20090289512MOTOR/GENERATOR STRUCTURE - A radial gap motor/generator has a thin annular array of magnets mounted for rotation to a stator in a radially spaced relation to at least one thin annular induction structure fixed to a stationary stator may be air or liquid cooled. Further, the motor has at least radial gap between a magnetic core and the array and may include multiple gaps and multiple annular induction structures to increase the overall power density of the system.11-26-2009
20120032538ROTATIONAL ELECTRICAL MACHINE AND VEHICLE DRIVE DEVICE - A rotating electrical machine configured with a rotor and stator. The rotor is rotatably supported radially inside of a stator that has coil end portions on both sides in an axial direction, and which is structured so that oil is supplied from an axial first direction side to the coil end portions on the both sides in the axial direction. A communication oil passage provided in at least one of the rotor and the rotor support member, is configured to communicate with a first opening and a second opening from an oil collecting portion. The first opening opens radially inside the coil end portion on the axial first direction side, and the second opening opens radially inside the coil end portion on an axial second direction side, which is the other side in the axial direction of the rotor.02-09-2012
20110298314VEHICLE DRIVE SYSTEM - A vehicle drive system configured with a dynamo within a case. The case is disposed on at least one axial side of the dynamo, and includes a wall portion overlapping the dynamo, which has a section that overlaps with the dynamo as viewed from the axial direction. The wall portion overlapping the dynamo includes a supply flow passage through which lubricating-cooling fluid flows, and which is formed with a first supply portion that supplies lubricating-cooling fluid to a rotor support bearing for the dynamo electric. The first supply portion includes a throttle portion whose flow passage cross-sectional area is small when compared to an upstream-side flow passage cross-sectional area in the flow direction of lubricating-cooling fluid. The supply flow passage includes a second supply portion that is a portion supplying lubricating-cooling fluid to the dynamo and higher than the first supply portion.12-08-2011
20110298315Electric Machine Cooling System and Method - Embodiments of the invention provide an electric machine module including a housing. In some embodiments, the housing can include a sleeve member coupled to at least one end cap. The housing can include an inner wall at least partially defining a machine cavity, a coolant sump, and at least one coolant channel positioned between the inner wall and an outer wall of the housing. In some embodiments, the coolant channel can be in fluid communication with the coolant sump. In some embodiments, an electric machine can be positioned in the machine cavity. The electric machine can comprise a stator assembly including stator end turns and a rotor assembly. In some embodiments, a coolant jacket can be at least partially defined by the housing and can be positioned so that to at least partially circumscribe a portion of the stator assembly.12-08-2011
20110074233COOLING STRUCTURE OF MOTOR - An internal cooling structure for a motor, which is effective to remove the heat in the rotor to achieve high cooling effect is provided. The motor includes a stator having a stator coil and a stator core, and a rotor positioned on an inner side of the stator core. The rotor includes a tubular rotor spindle on a rotor drive shaft, and the rotor core is fitted to the rotor spindle. A cooling space is defined between the rotor drive shaft and the rotor spindle. An inner peripheral surface of the rotor spindle confronting the cooling space has tapered shape having large diameter at an end portion. An oil feed passage for a cooling oil is defined inside the rotor drive shaft, and a cooling oil discharge port of such oil feed passage is formed in the rotor drive shaft confronting the cooling space.03-31-2011
20100013330COOLED ELECTRIC GENERATOR WITH TUBES EMBEDDED IN THE COVER THEREOF - A cooling electric generator with pipes embedded in its housing which includes mechanisms for generating electrical power from the motor torque provided by a wind turbine rotor, and with an external housing comprised of a cylindrical casing (01-21-2010
20120013206Cooling System and Method for an Electric Machine Module - Embodiments of the invention provide an electric machine module including an electric machine. The electric machine includes a rotor assembly. The machine includes an output shaft having a longitudinal axis that is circumscribed by a portion of the rotor assembly. The output shaft comprises an output shaft channel and is coupled to the rotor assembly. A coolant passage system is positioned within the rotor assembly and includes an inlet channel in fluid communication with the output shaft channel and at least one recess. The recess is in fluid communication with the inlet channel. The coolant system can include an outlet channel in fluid communication with the recess. The outlet channel can include at least one coolant outlet so that the coolant outlet is a greater radial distance form the longitudinal axis than is the output shaft channel.01-19-2012
20100102653Arrangement for Cooling of an Electrical Machine - An arrangement for cooling an electrical machine is provided. The electrical machine is connected with a first cooling-system which directly cools the electrical machine. The first cooling-system circulates a first cooling-medium. The first cooling-system is connected with a second cooling-system which delivers heat from the first cooling-system to the second cooling-system. The second cooling-system circulates a second cooling-medium to remove the received heat. The first cooling-system is connected with a third cooling-system, which is a refrigeration-system, to additionally cool down the first cooling-medium of the first cooling-system.04-29-2010
20080309174Electric Motor with Permanent Magnet Excitation and Rotor Cooling - The invention relates to an electric motor (12-18-2008
20100033039ELECTRIC MOTOR - An electric motor for use in an electric vehicle, the electric motor includes: an inner housing which holds a stator; and an outer housing which defines a space through which cooling water is caused to flow between the inner housing and itself. The inner housing and the outer housing are connected by a plurality of columns disposed in the space.02-11-2010
20100072835Stacking Method For Electric Machines - Stacking more than one electric machine module (i.e., electromagnetic electric motor or generator system) with all stator bodies commonly attached and all moving bodies commonly attached increases the overall power of the stack according to the sum of power rating of each module in the stack. A keying object means comprises complementary keys on the stator and rotor bodies that allow easy mating alignment of at least two autonomous electric machine modules in the stack and preserve the mechanical integrity so all modules in the stack move or act as one large electric machine. Furthermore as an integral component in the manufacturing process of the electric machine module, the keying object means serves as an alignment mechanism for precision manufacture of the module chassis without precision methods, such as precision machining, or precision materials, or precision pieces, such as castings.03-25-2010
20110156507Hub Motor - A hub motor is provided. The hub motor includes a shaft, a casing, a first bimetal, and a second bimetal. The casing has an inner wall, a first through hole, and a second through hole. The first through hole and the second through hole are disposed on the inner wall. The first bimetal and the second bimetal are disposed on the inner wall. A first end of the first bimetal, after being heated, warps and exposes the first through hole. A second end of the second bimetal, after being heated, warps and exposes the second through hole. The first end faces substantially the same direction as the rotating direction of the casing. The second end faces substantially the reverse direction of the rotating direction of the casing.06-30-2011
20090256433Generator with a stator comprising cooling ducts, and method for cooling a laminated stator of a generator - A generator, for example of a wind turbine, includes two end plates and a plurality of stator laminate plates arranged between the two end plates, is described. Each laminate plate and each end plate comprise a number of cooling holes which are located such that the cooling holes of the laminate plates and the cooling holes of the end plates are aligned with each other to form a number of cooling ducts by the stator material itself. Furthermore, a method for cooling a laminated stator of a generator is described having a cooling fluid guided via a tubing from a cooling fluid reservoir into at least one a partly open cooling duct in the laminated stator.10-15-2009
20100141062Rotating Directional Coolant Spray for Electric Machine - Disclosed is a rotor for a fluid cooled electric machine including a rotor shaft rotably located at a central axis and a plurality of rotating coolant passages extending outwardly from the rotor shaft to direct a flow of coolant to a desired impingement location on the electric machine thereby removing thermal energy from the impingement location. Further disclosed is a fluid cooled electric machine including a plurality of coolant passages each including at least one coolant passage inlet and at least one coolant passage outlet, the plurality of coolant passages configured to rotate about the central axis and direct a flow of coolant therethrough to a desired impingement location thereby removing thermal energy from the impingement location.06-10-2010
20110148229ELECTRIC MACHINE HAVING SPRAY AND SUMP COOLING - An electric machine has a housing, and in the housing has at least one electrical assembly including a rotor, and having a cooling device which, in the lower region of the housing, has a sump pan that is situated or developed there for a coolant. The cooling device further has at least one coolant spray device for spraying the electrical assembly with coolant, the sump pan having a coolant discharge which, during non-operation of the electric machine, feeds the coolant into a coolant reservoir and is dimensioned so that, during operation of the electric machine at a specified coolant volume flow of the coolant spray device, a coolant level, which wets the rotor, sets in in the sump pan. A corresponding method is also provided.06-23-2011
20100079016INTEGRATED COOLING CONCEPT FOR MAGNETICALLY GEARED MACHINE - A magnetically geared machine having an integrated cooling concept is provided. The machine includes a rotor having an inner surface and an outer surface, a magnet assembly coupled to one of the inner or outer surfaces of the rotor, and a stator having a plurality of stator windings. The machine further includes a magnetic flux modulator interposed between the rotor and the plurality of stator windings, where the flux modulator includes a plurality of magnetically conductive portions and a plurality of non-magnetically conductive portions placed alternately, where one or more of the plurality of non-magnetically conductive portions comprise a channel for a cooling fluid.04-01-2010
20090284086SYSTEMS AND APPARATUS INVOLVING TOOTHED ARMATURES IN SUPERCONDUCTING MACHINES - A system for generating power comprising, a superconducting generator including, an armature assembly comprising, a body portion, a tooth portion having a front surface and a rear surface, a slot partially defined by the body portion and the tooth portion, an armature bar engaging the slot, and a cooling cavity partially defined by the tooth portion, communicative with the front surface and the rear surface.11-19-2009
20090278413ARCHITECTURE FOR ELECTRIC MACHINE - The invention includes an electric machine having a rotor, stator and at least one winding in the stator adapted to conduct a current, and a secondary winding, electrically isolated from the first winding and inductively coupled to the first winding, which may be used to control at least one of the output voltage and current of the first winding.11-12-2009
20090267426Liquid-cooled electric machine and method for cooling such electric machine - The present invention relates to an electric machine with a machine housing, in which a rotor and a stator winding are accommodated, wherein the stator winding includes winding heads arranged on opposite sides each in a winding head space, and with a cooling device which includes a liquid cooling circuit with a stator jacket cooling and cooling coils as well as a fan connected with the rotor for circulating air in the machine housing. The invention furthermore relates to a method for cooling such electric machine. In accordance with the invention it is provided that the cooling coils extend through the winding head spaces outside the winding heads and the fan includes two fan wheels each associated to a winding head space for generating an air flow circulating inside each winding head space, which by means of air duct and/or guiding means in the respective winding head space is circulatingly passed over the exposed cooling coils and through the winding heads. By cooling down the circulating internal air directly in or at the winding head space, a highly efficient cooling of the winding head space can be achieved, without having to sacrifice a compact construction.10-29-2009
20090261667ROTOR FOR ELECTRIC ROTATING MACHINE AND ROTATING MACHINE - A rotor for an electric rotating machine, improving cooling performance of the rotating machine. D-axis through-holes (10-22-2009
20090261668COOLING ELEMENT FOR AN ELECTRICAL MACHINE - In an electrical machine cooling element according to the invention, the electrical machine (10-22-2009
20100102651ARRANGEMENT FOR COOLING OF AN ELECTRICAL MACHINE - An arrangement for cooling an electrical machine is provided. A stator of the electrical machine contains a plurality of stacked laminate plates, each laminate plate having a plurality of slots on one side. The slots of the stacked laminate plates are forming channels, the channels containing metal-winding of electrical coils. A metal cooling-pipe is provided within at least one channel for cooling the laminate plates.04-29-2010
20080284263Water Jacket for a Rotary Machine and Rotary Machine Comprising Same - The invention concerns a water jacket for a rotary machine, the water jacket comprising at least one conduit (11-20-2008
20080303359Electrical Machine Having a Cooling Jacket - In order to improve the cooling of an electrical machine, the invention proposes an electrical machine having a stator (12-11-2008
20090315415ELECTRIC MOTOR COOLING RINGS - An electric spa motor includes a ring circling the motor and in direct contact with the motor case. The ring carries a flow of water to cool the motor and to provide heat to the flow of water to supplement a spa heater. The ring includes a passage through the ring for carrying the flow of water. The ring and the passage have cross-sections with approximately equal height and width.12-24-2009
20090309432TURBOMACHINE WITH INTEGRAL GENERATOR/STARTER - A turbomachine such as an aircraft turbojet including an electrical generator/starter that can be mounted and dismounted by axial translation in an upstream enclosure of the turbomachine between the low-pressure compressor and the high-pressure compressor, and couple to electrical cables which extend inside the structural arms of the intermediate casing of the turbomachine.12-17-2009
20130119793ELECTRIC DRIVE UNIT - An electric drive unit includes an electric motor, which has a stator and a rotor, a gearbox, an electric circuit and a housing. The housing forms a motor compartment in which the electric motor is arranged and a gearbox chamber in which at least a part of the gearbox is arranged. The electric drive unit also includes a lubricating circuit in which a lubricating fluid is conveyed in order to lubricate and cool the gearbox and the rotor of the electric motor, the lubricating fluid circulating between the motor compartment and the gearbox chamber. The drive unit further includes a cooling circuit in which a cooling fluid is conveyed in order to cool the electric circuit and also the stator of the electric motor. The cooling fluid of the cooling circuit is connected to the lubricating fluid of the lubricating circuit in such a manner as to be able to exchange heat.05-16-2013
20130214624ELECTRIC MACHINE COOLING - Embodiments of the invention provide an electric machine module including an electric machine. The electric machine includes a rotor and a stator assembly, and an output shaft having a longitudinal axis that is circumscribed by a portion of the rotor. The output shaft may comprise an output shaft channel and the rotor may include a rotor channel, and the rotor and the output shaft channels may be in fluid communication. The machine further includes a coolant jacket at least partially within a sleeve member that circumscribes at least a portion of the stator assembly, and at least one pump mounted generally concentrically with respect to the output shaft, that is in fluid communication with the coolant jacket. Some embodiments of the electric machine module include coupling to a fluid system that is configured and arranged to transport fluid, such as the coolant, throughout the fluid system.08-22-2013
20090051232Coolant Pump for Electric Motors - The invention relates to a liquid-cooled electric motor (02-26-2009
20120104884ELECTRIC MOTOR AND METHOD OF COOLING - A system for cooling an electric motor, the electric motor including a stator disposed about a rotor, wherein cooling system includes a rotor assembly including a shaft with a shaft channel extending through the center of the shaft and radial channels extending radially from the shaft channel; a rotor with profiled rotor ends; and two guides, each coupled to a rotor end, that guides fluid from the shaft exterior to the rotor end. The system may additionally include interior channels that traverse through the rotor interior, wherein the interior channels fluidly couple the radial channels to a guide-rotor end pair. The system may also include stator cooling mechanisms, including cooling channels within the motor casing proximal to stator exterior surface and dispensing mechanisms that dispense working fluid to the stator coils.05-03-2012
20120104883DRIVE MODULE AND MANIFOLD FOR ELECTRIC MOTOR DRIVE ASSEMBLY - A coolant fluid distributing manifold for a drive module in an electric motor drive assembly includes a body and passageways in the body for distributing coolant fluid to components of the drive module. The passageways define a delivery conduit and a return conduit.05-03-2012
20120139370METHOD OF COOLING STARTER GENERATOR STATOR - A housing for a generator stator has a port through the housing and communicates with a channel extending circumferentially across an inner bore of the housing. The channel extends for a depth along a first distance. An inner bore of the housing is at a radius. A ratio of the depth to the radius is between 0.018 and 0.035. In addition, a generator including the basic cooling structure, and a method of assembling the generator are also disclosed.06-07-2012
20090184591Rotating Electrical Machine - A rotating electrical machine includes: a stator that including a stator core and a teeth section, with a stator coil wound at the teeth section; a rotor arranged via a clearance at an inner periphery side of the stator and supported in a freely rotating manner; and a distribution unit supported by a resin holder, and including a conductor connected to the stator coil. The rotating electrical machine is cooled by coolant. The stator coil includes a coil end section projecting from an end of the stator in an axial direction. A gap is formed between an end of the stator core and a lower surface of the distribution unit by mounting the distribution unit on an upper part of the coil end section. The gap constitutes a path for the coolant.07-23-2009
20110221287STATOR SECTION FOR AN AXIAL FLUX ELECTRIC MACHINE WITH LIQUID COOLING SYSTEM - In a stator section (09-15-2011
20110227431DYNAMOELECTRIC MACHINE - The invention relates to a dynamoelectric machine (09-22-2011
20090096300LIGHT WEIGHT LOW COST MOTOR HOUSING AND COOLING FIN ASSEMBLY - A motor housing and cooling fin assembly for an electric motor comprises a stator support having a longitudinal base and a series of fin plates protruding radially from the base, the fin plates for directing fluid coolant through the motor, a cylindrical support sleeve comprising a thin wall, the thin wall containing a series of slots for receiving distal ends of the fin plates; and a motor housing having a cylindrical inner wall, the support sleeve positioned between the stator support and the motor housing in an interference fit. By reducing the thickness of the motor housing by more than the thickness of the added cylindrical support sleeve, the motor housing is lighter. Instead of machining slots directly into the motor housing, they are machined the cylindrical support sleeve, which is of simple geometry, thereby reducing the difficulty and cost of manufacturing.04-16-2009
20090230788Electric Motor - An electric motor (09-17-2009
20120194012Electric Machine Cooling System and Method - Some embodiments of the invention provide an electric machine module comprising an electric machine including a rotor assembly and a rotor hub. In some embodiments, the module can include a output shaft substantially circumscribed by the rotor hub and including at least one channel and at least one coolant outlet. A cavity can be formed by at least the output shaft and the rotor hub. Some embodiments can include a sleeve substantially circumscribing a portion of the output shaft with at least a portion of the sleeve positioned substantially within the cavity between the output shaft and the rotor hub. The sleeve can include at least one groove.08-02-2012
20090256434Liquid-Cooled Machine - A machine includes an inner air-cooled rotor and an outer liquid-cooled stator, in which the stator includes a radial cooling arrangement arranged to convey a cooling liquid radially in the stator.10-15-2009
20100264760ELECTRIC ROTATING MACHINE - The electric rotating machine includes a rotor relatable around a rotating shaft disposed horizontally, a stator core formed with slots, and a stator coil constituted of in-slot portions each of which is accommodated in a corresponding one of the slots, and turn portions each of which connects corresponding adjacent two of the in-slot portions at a position outside the stator core. The turn portions form a coil end projecting axially outward from an end surface of the stator core at each of both axial end sides of the stator core. The coil end is formed in a cylindrical shape including an axial end surface of a flat shape, and inner and outer peripheral surfaces of a circular shape. The electric rotating machine further includes a coolant supply section to supply coolant to an upper part of the outer peripheral surface of the coil end.10-21-2010
20100264759INTEGRATED BRUSHLESS STARTER/GENERATOR SYSTEM - A brushless starter/generator includes a rotor rotatably mounted within a stator mounted within a housing and an oil cooling system using cooling oil from an engine accessory gearbox for cooling the rotor and the stator. The rotor is fixedly mounted on a rotor shaft having a rotor heat exchanger disposed therein. A stator heat exchanger for cooling the stator includes an oil jacket around the housing. The stator heat exchanger includes a grooved tube around the housing and axially extending axial passages connected to annular inlet and outlet manifolds in the grooved tube. The rotor shaft is operably connected to a power take-off shaft within the gearbox and rotatably supported by a shaft bearing in a gearbox casing of the accessory gearbox. The oil cooling system is a dry cavity oil cooling system which prevents cooling oil from entering an air gap between the rotor and the stator.10-21-2010
20100176669Liquid Cooling Arrangement for Electric Machines - A liquid cooling arrangement for electric machines uses a continuous cooling tube associated with a heat storing element. The cooling tube has a serpentine configuration and the heat storing element includes longitudinal slots starting from both longitudinal ends of the heat storing element. Accordingly, it is possible to slightly deform the heat storing element to properly position it into the internal stator of an electric machine. An internal biasing assembly may be used to force the external surface of the heat storing element to the internal surface of the stator.07-15-2010
20100259118VEHICLE DRIVE DEVICE - A vehicle drive device (10-14-2010
20090079279Water Cooled Stator for a Direct Drive Torque Motor - A water cooled stator for a direct drive torque motor comprises a stator base, silicon steel sheets, coils, sealing glue and a water cooled sealing tube. A helical water groove is defined in the outer surface of the stator base. The silicon steel sheets and coils are fixed in the stator base by the sealing glue after solidification. Then, the water cooled sealing tube is directly mounted outside the stator to seal the helical water groove by liquid. By such arrangement, the water cooled sealing tube is used to accomplish simple and independent water cooled sealing, the volume of the products can be effectively reduced, and the water cooled sealing tube can be applied to various tool machines.03-26-2009
20090079278SEGMENTED MOTOR COOLING JACKET - A cooling jacket for an electric motor includes a plurality of jacket portions that are attached to each other to surround a motor stator. Each jacket portion is an extruded component that includes an outer peripheral wall and an inner peripheral wall spaced inwardly from the outer peripheral wall to form a cooling space between the inner and the outer peripheral walls. A plurality of connecting walls extends between the inner and the outer peripheral walls. The connecting walls cooperate with each other to define a plurality of discrete cooling passages within the cooling space of each jacket portion. First and second end caps are mounted to the plurality of jacket portions to enclose the plurality of discrete cooling passages such that a continuous cooling loop is provided through the plurality of jacket portions and the first and second end caps.03-26-2009
20100194219DRIVING APPARATUS AND VEHICLE INCLUDING DRIVING APPARATUS - A driving apparatus includes a rotating electrical machine; an inverter capable of supplying electric power to the rotating electrical machine; a containing case; a coolant circuit distributing coolant capable of cooling the inverter and the rotating electrical machine; a cooling mechanism, which is provided in the coolant circuit, is contained in the containing case, and is capable of cooling the rotating electrical machine and the inverter; and a supplying pipe capable of supplying the cooling mechanism with the coolant circulating in the cooling circuit.08-05-2010
20090267427STRUCTURE FOR MOUNTING VEHICLE DRIVING APPARATUS - A mounting structure for a vehicle driving apparatus includes a housing fixed to a vehicle body and including a first internal space and a second internal space formed below the first internal space in the state of being separated from the first internal space; a motor generator provided in the first internal space of the housing; an inverter provided in the second internal space of the housing; and a terminal electrically connecting the motor generator and the inverter. Oil used for cooling the motor generator is stored in the bottom of the first internal space. The portion in the terminal located in the first internal space is located above the highest liquid level of the oil stored in the first internal space.10-29-2009
20100001596System and method for cooling a superconducting rotary machine - A system for cooling a superconducting rotary machine includes a plurality of sealed siphon tubes disposed in balanced locations around a rotor adjacent to a superconducting coil. Each of the sealed siphon tubes includes a tubular body and a heat transfer medium disposed in the tubular body that undergoes a phase change during operation of the machine to extract heat from the superconducting coil. A siphon heat exchanger is thermally coupled to the siphon tubes for extracting heat from the siphon tubes during operation of the machine.01-07-2010
20100277016METHODS AND APPARATUS FOR A PERMANENT MAGNET MACHINE WITH A DIRECT LIQUID COOLED STATOR - A permanent magnetic machine includes a stator body having a first end, a second end, and a plurality of generally radial slots formed therein for accepting a set of windings having a first set of end-turns at the first end and a second set of end-turns at the second end. The stator body has a plurality of channels adjacent to the slots and extending from the first end of the stator body to the second end of the stator body, wherein the channels are configured to allow the flow of a cooling fluid therethrough. A plurality of nozzles in fluid communication with the plurality of channels are configured to spray the cooling fluid onto the first and second set of end turns.11-04-2010
20120126642ELECTRIC MOTOR - An electric motor has a rotor, stator, and covers. A stator coil is a pre-wound coil inserted into slots of a stator core from its inner side. A no-lead-wire side coil end portion of the stator coil protrudes radially inward. A no-lead-wire side coolant chamber is liquid-tightly defined by the cover covering the no-lead-wire side coil end portion and a seal plate(s) that is attached from or on a radially inner side of the stator core so as to cover an opening between the inner peripheral edge of the cover and the inner peripheral edge of the stator core.05-24-2012
20100219705COOLING APPARATUS FOR ELECTRIC MOTOR - A cooling apparatus for an electric motor includes a mount to be fixed to and abutted against the electric motor, and a cooling unit installed to the mount. The mount defines at least two channels. The cooling unit connects adjacent said at least two channels to form a passage to allow a cooling fluid flowing in the passage.09-02-2010
20130127269METHOD OF OPERATING AN ELECTRIC MACHINE HAVING AN INTEGRATED COOLANT LEVEL SENSOR - A method of operating an electric machine includes flowing a coolant into an interior portion of a housing of the electric machine, and sensing a level of coolant in a coolant collection area within the interior portion with a coolant level sensor arranged at the housing.05-23-2013
20100033040ROTARING ELECTRIC MACHINE - To provide a rotating electric machine capable of accurate detection of coil temperature by causing refrigerant to flow so as not to contact a temperature detecting element provided on a coil end portion. A rotating electric machine (02-11-2010
20120194013ROTATING ELECTRICAL MACHINE - A rotating electrical machine according to an embodiment includes a rotor rotatable around a rotation axis, a stator arranged to face the rotor, and a frame which accommodates the rotor and the stator and in which a refrigerant flow path is formed in a sidewall. The frame includes a through hole that penetrates from the refrigerant flow path to an outer periphery of the sidewall and is covered by a lid member.08-02-2012
20090322167ELECTRIC ROTATING MACHINE WITH MEANS FOR FEEDING COOLING LIQUID TO ITS STATOR WINDING - The electric rotating machine includes a rotor, a stator having a stator core and a stator winding wound on the stator core, and a cooling liquid feeding function of applying cooling liquid to the coil end of the stator winding. The stator winding constituted by coils wound along the circumferential direction includes crossover portions each of which electrically connects the ends of two of the coils through which currents in the same phase flow, respectively. The crossover portions are arranged so as to overlap one another only partially in the circumferential direction. The cooling liquid feeding function applies the cooling liquid to at least one of the crossover portions.12-31-2009
20090179509Method for influencing the temparture of an electromechanical component and device for carring out the method - A method and a device for influencing the temperature of at least one electromechanical component situated in a motor vehicle, in which a transmission situated in the motor vehicle is cooled by a transmission oil flowing in a transmission cooling circuit. A cooling circuit branch is provided for influencing the temperature of the electromechanical component. The transmission oil also flows in the cooling circuit branch as a heat carrier. The flow rate of the transmission oil in the cooling circuit branch is influenced for influencing the temperature of the electromechanical component as a function of the setpoint operating temperature and/or the actual operating temperature of the electromechanical component.07-16-2009
20110025144COOLING HOUSING FOR A SWITCHED RELUCTANCE ELECTRIC DEVICE - The present disclosure provides a fluid-cooled housing for an electric device having a housing. The housing includes an outer surface and an inner surface, the inner surface defining, at least in part, a housing cavity having a longitudinal axis, an end wall continuous with the inner surface, thereby substantially enclosing the housing cavity at a first end, and a chain of cooling channels creating a serpentine pattern defined along the inner surface of the housing.02-03-2011
20110241459MAGNET GENERATOR - In a flywheel-type magnet generator, a heat dissipation member which has no relation with a magnetic circuit is fitted into a space formed by cutting a bulk of a laminating core used for configuring the magnetic circuit, a cooling tube installed to be inserted into or penetrate the heat dissipation member is provided, and by supplying a cooling medium to the cooling tube, cooling performance of the stator is enhanced.10-06-2011
20110084561OIL COOLED MOTOR/GENERATOR FOR AN AUTOMOTIVE POWERTRAIN - An oil-cooled motor/generator for an automotive powertrain located outside of the transmission is provided, such as a BAS motor/generator. The motor/generator may have a stator, a rotor circumscribed by the stator, and a motor shaft on which the rotor is mounted for rotation. A housing assembly may surround the stator and the rotor, with a bearing positioned between the housing assembly and the motor shaft. A flow control member may at least partially circumscribe the rotor axially adjacent the stator. A bearing retainer may be positioned axially adjacent the bearing. A rotor end ring may be axially adjacent the rotor. The housing assembly may have an inlet configured to receive cooling oil. The housing assembly, the flow control member, the bearing retainer and the rotor end ring may be configured to distribute the cooling oil from the inlet to cool the stator, the rotor and the bearing.04-14-2011
20100176668Stator - A stator that includes a cylindrical stator core, which has a plurality of slots that are provided at predetermined intervals in a circumferential direction and open toward an inner peripheral surface of the stator core; and a coil, which has a coil end portion protruding from an axial end of the stator core.07-15-2010
20100038981ROTATING ELECTRIC MACHINE AND COOLING SYSTEM FOR THE ROTATING ELECTRIC MACHINE - Heat discharging property of the stator coil end is improved effectively in a rotating electric machine. A motor as the rotating electric machine includes a stator and a rotor. The stator includes a stator core and resin mold coil ends provided on both axial ends thereof. Column-shaped projections projecting in the axial direction are provided on axial side surfaces of resin mold coil ends at a plurality of positions. Cooling oil supplied from above the resin mold coil ends effectively cools the resin mold coil ends.02-18-2010
20110175467COOLANT SYSTEM FOR ELECTRIC MOTORCYCLE - A cooling system for an electric motor of an electric motorcycle is disclosed. The cooling system includes a motorcycle frame including an internal volume, an entrance orifice and an exit orifice. The cooling system further includes an electric motor including an internal volume, a first tubular element connecting the exit orifice with the electric motor and a second tubular element connecting the electric motor with the entrance orifice. The cooling system further includes a liquid coolant located within the internal volume of the frame, the internal volume of the first and second tubular elements and the internal volume of the electric motor. The cooling system further includes a pump for circulating the liquid coolant from the electric motor, through the first tubular element, through the entrance orifice of the frame, through the internal volume of the frame, through the exit orifice of the frame and back to the electric motor.07-21-2011
20100038980COOLING SYSTEM OF A SUPERCONDUCTING MACHINE - A superconducting machine device is disclosed including a machine; a rotor including a superconductive coil; and a cooling system including at least one incline-intolerant component for cooling the coil. In at least one embodiment, at least one component is held by a carrier compensating for an incline of the machine device.02-18-2010
20100072834Assemblies for Electrical Machines - The present invention provides an assembly for mounting to, or forming part of, the stator assembly of a rotating electrical machine. A plurality of component modules are provided at angularly spaced-apart locations around the assembly and contain power electronics components. Electrically conductive toroidal inlet and outlet manifolds are provided to convey coolant fluid (preferably a liquid dielectric such as MIDEL) to and from the component modules. The inlet and outlet manifolds provide a dual function as a coolant circuit for conveying coolant fluid and as busbars.03-25-2010
20120242178ROTATING ELECTRICAL MACHINE - A rotating electrical machine includes: a rotor whose axis is disposed in a horizontal direction, a stator core that is disposed in an outside of the rotor, a coil that is wound in a slot which is provided along the axial direction of the stator core, whose end sections of windings protrude from a front end and a rear end of the stator core in the axial direction as coil ends and whose one end of a winding wire is drawn as a lead wire to the outside, and an annular cooling jacket. The cooling jacket has an opening through which the lead wire of the coil is drawn to the outside and the opening is provided at a predetermined height position above an upper end of the coil end as a reference position.09-27-2012
20110068645Mill Drive System - A mill drive system with a transmission arranged beneath a milling table and with at least one planetary and/or spur gear stage as well as a vertical shaft position is provided. In addition, an electric motor is integrated in a housing of the transmission and is connected to a lubricant supply circuit of the transmission. A rotor and a stator of the electric motor have vertically extending axes. Cooling of the motor is performed by a lubricant circulating through the transmission. Furthermore, a lubricating-oil-proof sheath for rotor and/or stator windings of the electric motor for sealing with respect to the lubricant is provided. In addition, the mill drive system includes a converter with a regulation device for backlash-free speed regulation of the electric motor.03-24-2011
20100244595HEAT TRANSFER THROUGH ELECTRICAL SUBMERSIBLE PUMP MOTOR - The motor of an electrical submersible pump generates a significant amount of heat that can be removed by transferring it to the well production fluid. Grooves in the stator and motor housing facilitate more rapid heat transfer from the rotor and stator, through the motor lubricant, to the motor housing. Increased heat transfer to the motor housing facilitates increased heat transfer to the production fluid on the outside of the motor housing.09-30-2010
20100244594Stator - A stator includes a substantially cylindrical stator core, which has a fixing ridge provided with a fastening portion for fixing, and which is positioned so that an axial center of the stator extends substantially horizontally; and sealing members, which are respectively attached to both axial ends of the stator core so as to be positioned on a side of the uppermost part of the main body outer peripheral surface with respect to the target ridge, and which respectively form sealing walls that have a height equal to or higher than a horizontal plane extending in the uppermost part of the ridge outer peripheral surface, wherein a recess surrounded by the ridge outer peripheral surface, the main body outer peripheral surface, and the sealing walls serves as a refrigerant reservoir recess for storing a refrigerant.09-30-2010
20090230789DRIVE SYSTEM - The invention relates to a drive system having at least one electrical direct drive and at least one bearing module, wherein the bearing module has a radial bearing and/or an axial bearing, and wherein the electrical direct drive and the bearing module have a cooling device.09-17-2009
20090015081Cooling structure and cooling method of rotating electrical machine - A cooling structure of a rotating electrical machine including a stator and a rotor, the cooling structure including magnet accommodating holes provided in a rotor core of the rotor, the magnet accommodating holes extend between axial core end faces of the rotor core, wherein permanent magnets are accommodated in the magnet accommodating holes; a plurality of voids, which prevent leakage flux, in contact with the permanent magnets and extending between the axial core end faces; and a rotor cooling-liquid supply passage that supplies cooling liquid to one core end face, wherein the cooling liquid supplied from the rotor cooling-liquid supply passage is introduced into the voids to prevent leakage flux, and the permanent magnets are cooled by the cooling liquid flowing through the voids.01-15-2009
20110001370ELECTRIC MOTOR INTEGRATED HYDRAULIC MOTOR - The present invention provides a small-size light-weight electric motor integrated hydraulic motor which is simple in configuration, integrally includes an electric motor and a hydraulic motor, and is capable of efficiently operate, by being configured such that: a swash plate type hydraulic motor and an electric motor driven by the swash plate type hydraulic motor are provided in one casing; the casing is filled with oil; a driving shaft of the swash plate type hydraulic is configured to extend from a front end portion of the casing up to a rear end portion thereof and be supported at the front and rear end portions of the casing; the swash plate type hydraulic motor and a rotor of the electric motor are provided in series at the driving shaft; and a stator of the electric motor is fixed to an inner side portion of the casing.01-06-2011
20100320851INTERNAL OIL COOLING VIA HOUSING END BRACKETS FOR AN ELECTRIC MACHINE - A system for cooling an electrical machine is disclosed. The electrical machine includes a stator including a plurality of coils, an exterior housing, and an end cap. During operation of the electrical machine, a fluid is sprayed from the end cap onto the plurality of coils to carry away heat generated by the electrical machine.12-23-2010
20130169078SYSTEMS AND METHODS TO TRANSFER HEAT WITH ELECTRIC DEVICES - An electric device is disclosed capable of generating heat during operation. The electric device can be in thermal communication to dissipate the heat through the use of carbon nanotubes and/or a phase change material. In one form the electric device includes a housing that has the carbon nanotubes. The housing, furthermore, can be a composite that in some embodiments does not provide as effective heat transfer as the carbon nanotubes. The electric device can take the form of a power electronic device in some embodiments and a device having a rotor and stator in others. Such embodiments include motors and/or generators.07-04-2013
20100283333OIL PRESSURE REGULATING VALVE FOR GENERATOR APPLICATIONS - A generator includes a rotor to be driven to rotate and generate electricity and a housing receiving the rotor. An oil supply includes an oil inlet port and an oil outlet port. A pressure regulating valve regulates the flow of oil from the inlet port to the outlet port. The pressure regulating valve includes a valve sleeve mounted within the housing. The valve sleeve extends into a bore within the housing. A valve spool is mounted within the valve sleeve. The valve sleeve has a flange abutting an outer face of the housing. Bolts tighten the flange against the housing. An inner end of the valve sleeve extends radially inwardly to form a ledge. The ledge is spaced away from an inner face of the housing. A valve sleeve, a sense piston and a valve spool are also disclosed and claimed.11-11-2010
20110133580Rotating Electrical Machine - A rotating electrical machine includes: a stator that includes a cylindrical stator core and a stator winding wire wound around the stator core; and a rotor disposed facing the stator via a gap; wherein at least one cooling medium path extending in a direction of a central axis of the stator core is provided in the stator; and the cooling medium path is inclined relative to the central axis of the stator core.06-09-2011
20100320850OIL COOLED GENERATOR - A rotor for a dynamoelectric machine may include a rotor shaft having a first shaft and a second shaft within the first shaft. The two shafts include discharge orifices for communicating a cooling fluid through the machine. A rotor core of the machine includes a lamination having an annular portion that circumscribes an open center, a plurality of pole portions extending outwardly from the annular portion, and coil winding regions adjacent to the pole portions. One or more channels extend between the open center and the coil winding regions to communicate a cooling fluid. Coil windings of the machine may be at least partially encased in insulators. Each insulator may include a fluid entry orifice located between the insulator ends to communicate a cooling fluid. An end plate of the machine may include fluid discharge outlets for communicating cooling fluid received from the coil windings.12-23-2010
20090009012ASSEMBLY AND METHOD FOR MAGNETIZATION OF PERMANENT MAGNET ROTORS IN ELECTRICAL MACHINES - A magnetizer for a rotor of an electrical machine is provided. The magnetizer includes a magnetizing yoke and coils wound around the magnetizing yoke. The magnetizing yoke includes multiple pole-pieces extending therefrom, and at least some of the pole-pieces include a cobalt alloy.01-08-2009
20110074234HEAT DISSIPATING DEVICE OF AN ELECTROMOTOR - A heat dissipating device of an electromotor is a composite cooling device driven in a powerless manner and used for stirring a cooling liquid applied on a surface of a casing of the electromotor. The heat dissipating device includes a pair of bearings fitted on the casing, and a roller disposed at outer ring seats of the pair of bearings. The roller has a sealed chamber therein, the chamber covers a surface of the casing located in a disposition region of the bearings, and at least one outer blade is disposed outside the roller. Thereby, composite heat dissipating of liquid cooling and air cooling of the electromotor is implemented with a cooling liquid injected into the chamber of the roller and a wind force applied on the outer blade.03-31-2011
20090195093Hybrid Vehicle - An electric motor radiator (08-06-2009
20110304228Potted End Turns of an Electric Machine - Embodiments of the invention provide an electric machine module and a method for cooling an electric machine module. The electric machine module includes an electric machine including a stator with stator end turns, a liquid-cooled housing at least partially enclosing the electric machine, and a potting material in contact with and at least partially surrounding the stator end turns. The method includes potting at least some of the stator end turns with the potting material to provide a thermally-conductive path from the stator end turns to the housing and circulating a coolant through the housing to at least remove heat energy conducted from the stator end turns to the housing.12-15-2011
20100026109ELECTRIC MOTOR WITH HEAT PIPES - A motor including a frame that defines a motor portion and an adjacent cooling portion, and a plurality of heat pipes disposed within and fully enclosed by the motor frame. Each heat pipe has an evaporator end disposed within the portion of the frame that defines the motor portion and a condenser end disposed within the portion of the frame that defines the cooling portion. A cooling chamber within the motor cooling portion is structured to have a fluid introduced therein by a working device such that at least a portion of the frame defining the cooling portion is cooled via the working fluid, thereby extracting heat from the heat pipe condenser ends and cooling the motor portion of the motor.02-04-2010
20120043835MATERIAL MATRIX FOR COOLING MEDIA ENHANCEMENT - An electric machine includes: a stator having stator windings; a rotor configured to interact electromagnetically with the stator; and a housing configured to house the stator and the rotor. A material matrix is disposed within the housing and in contact with the stator windings. The material matrix defines a plurality of passages configured for the cooling fluid to flow within to remove heat from the stator windings.02-23-2012
20110316367ROTARY ELECTRIC MACHINE WITH IMPROVED COOLING CAPABILITY - In a rotary electric machine, a stator coil includes in-slot portions each contained in a corresponding one of slots of a stator core. The stator coil includes turn portions each connecting one end of a corresponding one of the in-slot portions projecting from one axial end of the stator core with one end of a corresponding alternative one of the in-slot portions projecting the one axial end of the stator core. The turn portions provide an end portion of the stator coil. A coolant guide is placed to cover a circumferential outer part of the end portion of the stator coil from radially outside thereof and provided with holes therethrough. The coolant guide guides a coolant therealong in a circumferential direction of the end portion of the stator coil while guiding, through the holes, a part of the coolant to the end portion of the stator coil.12-29-2011
20120205996ELECTRICAL MACHINE - The invention relates to an electric machine (08-16-2012
20120001503ELECTRIC MOTOR HAVING HEAT PIPES - An electric motor includes a rotor unit disposed rotatably in a motor housing. The rotor unit includes a rotor shaft rotatable relative to the motor housing about a central axis of the motor housing, a heat conductive seat mounted with a magnet member and in sleeved relationship to an intermediate portion of the rotor shaft, and angularly spaced apart heat pipes extending through an end portion of the rotor shaft thicker than the intermediate portion and into the seat. Each heat pipe has an end portion disposed outward of the rotor shaft, and extending into and in thermal contact with a heat conductive impeller connected to the second end portion of the rotor shaft to co-rotate with the rotor shaft and covered by an outer shell cap. A stator unit is mounted fixedly in and is in thermal contact with the motor housing, and is disposed around the rotor unit.01-05-2012
20110156510VEHICLE DRIVE MOTOR - A vehicle drive motor, capable of efficiently cooling the motor stator without being accompanied by an increase in size, includes a stator having an annular stator core, provided in an inner periphery of a tubular motor casing, and a stator coil provided in the stator core, and a rotor on an inner side of the stator core and rotatable relative to the stator. The motor casing includes an oil supply passage and an oil discharge passage in the motor casing and opening at an inner diametric surface of the motor casing, which are opposite axially to each other. Stator core grooves communicated with the oil supply passage and the oil discharge passage extend axially in an outer diametric surface of the stator core. Accordingly, lubricant oil may flow from the oil supply passage towards the oil discharge passage through the stator core groove.06-30-2011
20110156509ELECTRIC ROTATING MACHINE WITH COOLING MECHANISM - An electric rotating machine includes a rotor, a stator in which a coil is so wound as to have an coil end, and a coolant supply pipe. The coolant supply pipe lies with a length thereof extending substantially parallel to an axis of rotation of the rotor and is disposed above the stator in a direction of gravitational force. The coolant supply pipe has a first and a second coolant outlet through which coolant is to be emitted to the coil end. The first and the second coolant outlets are so oriented as to direct streams of the coolant to a first area and a second area of the coil end which are different in location from each other. This enables the coolant to be emitted to almost the whole of the coil end even when the electric rotating machine is titled in a direction in which the rotor turns.06-30-2011
20110156508ELECTRIC ROTATING MACHINE WITH COOLING MECHANISM - An electric rotating machine is provided which includes a stator in which a coil is so wound as to have an coil end and a coolant channel. The coolant channel has defined therein a flow path through which coolant flows and a flow separator disposed in the flow path and a first and a second coolant outlet. The flow separator works to separate a flow of the coolant into at least a first and a second coolant streams. The first coolant outlet communicates with the first coolant stream, while the second coolant outlet communicates with the second coolant stream. The first and second coolant outlets drain the coolant to different portions of the coil end, thereby cooling almost the whole of the coil end even when the electric rotating machine is tilted undesirably.06-30-2011
20120001504MODES OF COOLING HYBRID ELECTRIC MACHINES - A system and method for cooling an electric motor comprising a plurality of laminations defining a lamination stack, a coolant passage and a motor winding. Coolant is pumped into the coolant passage and forced along the entire length of the lamination stack. The coolant is then sprayed on the motor winding in order to cool the motor winding.01-05-2012
20120205995Electric Generator - The invention relates to an electric generator, comprising 08-16-2012
20120112568COOLING SYSTEM FOR AN ELECTRIC MACHINE SYSTEM INCLUDING AN ALTERNATING CURRENT (AC) ELECTRIC MACHINE HAVING AN INTEGRATED SWITCH ASSEMBLY - An electric machine system includes an alternating current (AC) electric machine. The AC machine includes a machine housing having a machine portion and a switch portion. A stator is fixedly mounted in the machine portion of the machine housing and a rotor rotatably mounted relative to the stator. A switch assembly is arranged within the switch portion of the machine housing and electrically connected to the stator. A direct current (DC) power source is electrically connected to the stator through the switch assembly. A cooling system is fluidly connected to the AC electric machine. The cooling system directs a flow of coolant onto the switch assembly in the switch portion of the machine housing, and onto at least one of the stator and the rotor in the machine portion of the machine housing.05-10-2012
20120025639APPARATUS FOR A HIGH SPEED SLEEVELESS ROTOR - A high-speed sleeveless rotor for an electric machine is provided. The rotor includes a shaft rotatable about a longitudinal axis, and a rotor core circumscribing at least a portion of the shaft wherein the rotor core includes an axially oriented slot. The slot includes a radially outer slot opening, a radially inner slot floor, and a slot sidewall extending therebetween. The slot floor includes a topstick attachment member extending radially outward from the slot floor and configured to engage a topstick positioned in the slot opening and the slot sidewall includes a shoulder configured to engage the topstick, preventing radially outward movement of the topstick.02-02-2012
20120205994FLOODED VARIABLE SPEED ELECTRIC MACHINE WITH VARIABLE FLOW - An electric machine includes a rotor, a stator, and an air gap defined by a space between the rotor and a stator. A volume of cooling fluid is located in the air gap and in contact with both the rotor and the stator. A method for cooling the electric machine includes sensing speed of the electric machine and varying the volume of coolant located in the air gap in response to the sensed speed of the electric machine.08-16-2012
20120119602Cooling of Permanent Magnet Electric Machine - A permanent magnet electric machine includes a rotor having a plurality of permanent magnets and a stator in magnetic communication with the rotor and positioned defining a radial air gap between the rotor and the stator. A housing is configured to seal the rotor and the stator from an outside environment. A pumping element is configured to urge a closed loop airflow across the plurality of permanent magnets to remove thermal energy therefrom, and a plurality of cooling channels are located in the housing and are configured to transfer thermal energy from the stator to a flow of fluid coolant through the plurality of cooling channels. A heat exchanger is located in thermal communication with the plurality of cooling channels to transfer thermal energy from the airflow to the fluid coolant.05-17-2012
20100289348AXIAL FLOW MACHINE - In an electrical axial flow machine, comprising a stator and a rotor, wherein either the stator comprises a coil arrangement and the rotor is provided with permanent magnet elements, or wherein the rotor comprises a coil arrangement and the stator is provided with permanent magnet elements, the stator is arranged spaced from the rotor under the formation of an air gap, each of the magnetic flux yokes has several neighbouring magnetic flux poles, the coil arrangement has at least one hollow cylindrical winding which is at least partially encompassed by magnetic flux yokes, the magnetic flux poles each have an outside which is oriented to the permanent magnet elements beyond the air gap, neighbouring permanent magnet elements in the circumferential direction have an alternating magnetic orientation towards the air gap, at least several of the magnetic flux poles are in certain positions of the rotor relative to the stator at least partially oriented in alignment with the permanent magnet elements, the magnetic flux yokes are formed from several ring cylinder segments, one support disk each is arranged between neighbouring magnetic flux yokes for the ring cylinder segments of the magnetic flux yokes in the direction of a longitudinal centre axis of the magnetic flux yokes, with the support disk comprising means for the mechanic positioning of at least two ring cylinder segments, forms a thermal path to a heat sink and has an electrically insulating effect.11-18-2010
20120126641STATOR COOLING DEVICE - A stator cooling device configured with a cylindrical stator main body that uses a rotation axis of a rotary electric machine as a central axis. A fixed portion is formed on an outer peripheral portion of the stator main body so as to protrude outward in a radial direction of the stator main body. A cooling medium flow passage includes an injection hole through which cooling medium is injected. The fixed portion is configured above a horizontal plane that passes through the central axis, and a peak portion that is farthest in the fixed portion from the central axis as viewed in an axial direction of the central axis. The injection hole opens toward the fixed portion above the outer peripheral portion of the stator and toward the first vertical plane side with respect to a second vertical plane that is a vertical plane that passes through the peak portion.05-24-2012
20120161554 COOLING SYSTEM FOR A HIGH DENSITY POWER MOTOR, IN PARTICULAR AN AXIAL-FLUX MOTOR - A cooling system for a high density power motor, in particular an axial-flux electric motor, wherein a pump is directly fitted in an axial position on the output shaft of the electric motor and feeds at outlet a flow of liquid coolant directed towards a first heat exchanger coupled to a power electronic supply circuit of said motor; the first heat exchanger having at least one outlet from which the liquid coolant is fed to a second heat exchanger coupled to the windings of the electric motor for cooling the electric motor itself; the cooling system carrying out in succession removal of the heat from the power electronic supply circuit and then from the electromagnetic part of the motor.06-28-2012
20120161553WATER-COOLING STRUCTURE FOR ELECTRIC MOTOR - A water-cooling structure for electric motor includes a motor main body, a heat-dissipation base, and a vortex-forming section. The motor main body is externally fitted around the heat-dissipation base. The heat-dissipation base is provided around an outer circumferential surface with at least one main flow passage. The vortex-forming section is provided in the main flow passage to create vortex effect on a type of cooling liquid flowing in the main flow passage, so as to enable an increased heat transfer efficiency of the water-cooling structure.06-28-2012
20110181136COOLING STRUCTURE OF STATOR - A cooling structure of a stator, including a case that accommodates a rotating electrical machine, and cooling a coil end portion protruding from a stator core included in the stator of the rotating electrical machine. The structure supplies a cooling medium from the stator axial direction toward a gap that is formed between an inner surface of the case and an outer edge of the stator core. The cooling medium introducing gap is formed above a portion of the coil end portion to which the cooling medium is to be supplied. A storage space forming member is provided along an outer peripheral surface of the coil end portion. The storage space forming member has a contact portion having a first contact portion that contacts the inner surface of the case to close the cooling medium storage space on the one side in the stator axial direction.07-28-2011
20120212084HIGH PERFORMANCE POWER GENERATION APPARATUS - A high performance power generation apparatus includes a first rotary member and a second rotary member. The first rotary member has a spindle and a rotor fastened to the spindle. The spindle has a first gear coupled thereon. The rotor has a first electromagnetic portion. The second rotary member has an internal gear ring and a second electromagnetic portion. The first gear and internal gear ring are interposed by at least one transmission gear. When the spindle drives the rotor and first gear to spin, the first gear drives the second rotary member to spin in the direction opposite to the first rotary member via the transmission gear so that the induction coil and magnet can interact at greater relative spinning speed to generate a greater amount of electric power output.08-23-2012
20120212083COOLING OF PERMANENT MAGNET ELECTRIC MACHINE - A cooling system for a sealed permanent magnet electric machine includes one or more flow driving devices disposed at a rotor of the electric machine configured to urge an airflow across a plurality of permanent magnets of the rotor and across a plurality of stator end turns of the electric machine to remove thermal energy therefrom. A plurality of cooling channels are located in the electric machine in thermal communication with the stator configured to transfer thermal energy from the stator to a flow of fluid coolant through the plurality of cooling channels. A heat exchanger is in thermal communication with the plurality of cooling channels to transfer thermal energy from the airflow to the fluid coolant.08-23-2012
20120212082COOLING OF PERMANENT MAGNET ELECTRIC MACHINE - A cooling system for a sealed permanent magnet electric machine includes a fan element configured to urge an airflow across a plurality of permanent magnets of a rotor of the electric machine to remove thermal energy therefrom. A plurality of cooling channels are located in a housing of the electric machine and are configured to transfer thermal energy from a stator of the electric machine to a flow of liquid coolant through the plurality of cooling channels. A heat exchanger is located in thermal communication with the plurality of cooling channels to transfer thermal energy from the airflow to the liquid coolant. One or more coolant supply conduits are configured to divert a portion of the airflow from the heat exchanger to an ancillary component of the electric machine to allow for transfer of thermal energy from the ancillary component to the airflow.08-23-2012
20120133221DUAL-ROTOR MOTOR HAVING HEAT DISSIPATION - An electric motor may include an outer rotor and an inner rotor, with a stator, which carries the excitation coils, formed as a hollow cylinder and engaging in the pot-shaped outer rotor and being connected to the housing or to a part of the electric motor fixedly connected to the housing, and where the electric motor may further include a water cooling and an air cooling system.05-31-2012
20120169158COOLING SYSTEM FOR AN ASYNCHRONOUS ROTOR - The invention relates to a cage rotor for an asynchronous machine (07-05-2012
20120169157COOLING MODULE AND WATER-COOLED MOTOR SYSTEM USING THE SAME - A cooling module and a water-cooled motor system using the same are provided. The cooling module comprises a main body and a first flow passage assembly. The main body comprises a first lateral portion and a second lateral portion opposite the first lateral portion. The first flow passage assembly, disposed in the main body, comprises a first flow passage and a second flow passage. The first flow passage has a first end and a second end, wherein the first end is adjacent to the first lateral portion, and the second end is adjacent to the second lateral portion. The second flow passage has a third end and a fourth end, wherein the third end is connected to the second end of the first flow passage, and the fourth end is adjacent to the first lateral portion.07-05-2012
20100052441Oil Cooling System for Motor - An oil cooling system for a motor includes a rotor, a stator core annularly positioned around the rotor, a plurality of coils annularly arranged and each wound around the stator core, and a plurality of oil discharging holes annularly arranged in a circumferential direction of the stator core, the oil discharging holes through which oil is discharged with pressure in an axial direction of the stator core to cool the coils.03-04-2010
20120313465ELECTRIC DRIVE UNIT - An electric drive unit includes a stator which is received in a metal housing, and a rotor rotates within the stator. A synthetic material housing is arranged on the metal housing in the region of the stator, the synthetic material housing forming at least one cooling channel for a cooling fluid in order to cool the stator via the metal housing.12-13-2012
20120074798Electromagnetic Rotary Machines Having Modular Active-Coil Portions and Modules For Such Machines - Electromagnetic rotary machines, such as electrical power generators and electric motors, that have one or more active portions modularized into a set of modules. Each of the modules is secured to a support frame via a sliding-interlock system that allows that module to be slidingly engaged with the support frame. In some embodiments, each module can include an integrated coolant conduit that carries a coolant to cool the active portion during operation. The modules can each be self-contained in the respect that essentially all that needs to be done to form the active portion and corresponding portion of the cooling system is to install the modules and make any remaining electrical and coolant conduit connections.03-29-2012
20120256502Stator Arrangement - 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.10-11-2012
20120262012ELECTRIC MACHINE MODULE COOLING SYSTEM AND METHOD - Embodiments of the invention provide an electric machine module including a housing. The housing can include an inner surface that defines a machine cavity. In some embodiments, an electric machine can be at least partially positioned within the machine cavity and can include a stator assembly. The stator assembly includes an outer diameter, a stator core, and a stator winding. The stator core can include at least two extended members that can radially extend from axial ends of the stator core. An annular member is coupled to the extended members to define a portion of a coolant jacket. The coolant jacket can be further defined between the annular member, the outer diameter of the stator assembly, and the extended members. The electric machine can be positioned within the housing so that the annular member is immediately adjacent to the inner surface.10-18-2012
20120235521Electric Machine And Oil Cooling Method For Electrical Machine - An electrical machine comprises a casing (09-20-2012
20120267970Coolant Flow Channel Arrangement for a Fluid Cooled Electric Motor - An improved fluid cooling arrangement for an electric machine, such as an electric motor, a generator, or a motor/generator assembly, is provided. In its most general sense, the fluid-cooled electric machine includes a rotor disposed on a motor shaft, a stator surrounding the rotor, and a motor housing surrounding the stator, with the stator formed of a laminated stack of stator plates that is plated at its outer surface.10-25-2012
20120267969EXTERNAL COVER-COOLED ROTARY ELECTRIC MACHINE AND CASING USED THEREIN - A center frame is fastened to a first bracket and a second bracket such that a first mated protrusion and a second mated protrusion are fitted together with a first mated recess portion and a second mated recess portion so as to be mated. O rings are disposed annularly so as to be held between an end surface of the first bracket and a first axial end surface of the center frame, and between an end surface of the second bracket and a second axial end surface of the center frame on an opposite side from outer circumferential inner wall surfaces of the first mated recess portion and the second mated recess portion.10-25-2012
20100231065MOTOR COOLING STRUCTURE - A motor cooling structure includes a coil end cover interposed between a coil end and a motor case, a liquid passage, in which a cooling liquid flows, formed between the coil end cover and the coil end or the motor case. A micro-gap into which part of the cooling liquid in the liquid passage flows, is formed between the coil end cover and the coil end or the motor case by sandwiching the coil end cover between the coil end and the motor case instead of attaching the coil end cover to the coil end or the motor case.09-16-2010
20120091838COOLING STRUCTURE FOR ROTARY ELECTRIC MACHINE - A cooling structure for a rotary electric machine uses coolant to cool coil end portions that protrude outward, one from each end surface of a stator core, in a stator that includes a stator core and coils that are wound in a circumferential direction of the stator core. This cooling structure includes a lead side cover member that covers a lead side coil end portion to which a lead wire that supplies electricity to the coils is connected, and forms a first coolant chamber within which coolant is stored; and a non-lead side cover member that covers a non-lead side coil end portion positioned opposite the lead side coil end portion in the axial direction, and forms a second coolant chamber within which coolant is stored. A coolant communicating path is provided that communicates the first and second coolant chambers in a manner that enables coolant to flow therebetween.04-19-2012
20120091837GENERATOR COOLING ARRANGEMENT OF A WIND TURBINE - The invention relates to a stator (04-19-2012
20120091836HEAT-GENERATING PORTION COOLING STRUCTURE OF VEHICLE DRIVE APPARATUS - A heat-generating portion cooling structure of vehicle drive apparatus that sufficiently supplies cooling oil to heat-generating portions to enhance efficiency of the vehicle drive apparatus when the heat-generating portions generate maximum heat includes drawing means for drawing oil in a case into a catch tank, and an oil circulation passage for circulating the oil through the catch tank while supplying the oil to first and second heat-generating portions. The oil circulation passage includes a first passage for the oil to flow to the first heat-generating portion when the oil surface in the catch tank is at a first height and a second passage for the oil to flow to the second heat-generating portion when the oil surface is at a second height lower than the first height, and more amount of oil flows to the second heat-generating portion than to the first heat-generating portion when the oil surface is low.04-19-2012
20120091835Motor-Generator Cooling System of Hybrid-Automobile - A motor/generator cooling system of a hybrid vehicle that has a first and second motor/generator disposed in an axial direction in a transmission, may include a cooling pipe that may be disposed in an axial direction along an upper and outside of the first and second motor/generator in the transmission, a rear cover that may be connected to a downstream side of the cooling pipe such that the cooling pipe may be fixed thereto, an input supporter that may be connected to an upstream side of the cooling pipe, forms a cooling oil passage, and rotatably supports a rotor of the first motor/generator, and a case that the rear cover and the input supporter may be mounted thereon, an oil filter connected to a hydraulic pump may be mounted therein, a penetration hole may be formed therein, and the cooling pipe penetrates the penetration hole to be fixed thereto.04-19-2012
20120091834Split Drain System and Method for an Electric Machine Module - Embodiments of the invention provide an electric machine module including module housing with an inner wall and at least one end cap. The module can at least partially define a machine cavity. The electric machine module can also include at least two drain holes positioned substantially circumferentially apart from one another and extending through a lower portion of the module housing. The at least two drain holes can provide gravity-fed fluid pathways out of the machine cavity.04-19-2012
20120286595ENHANCED DUAL LIQUID COOLING SYSTEM FOR ELECTRIC MOTOR - An electric machine includes a rotor within a cavity defined within a stator. A liquid coolant is utilized to cool the stator and rotor. The liquid coolant flows through a gap defined between the stator and the rotor. A second coolant is provided that is contained within a second cavity disposed annularly about the first cavity. Thermal energy is transferred away from the gap by way of the first coolant flowing through the gap and by natural convection of the second liquid coolant within the second cavity. The additional mechanism for transferring heat enhances electric machine operation and provides increased operational capacities.11-15-2012
20130015730ENHANCED SPRAY COOLING TECHNIQUE FOR WEDGE COOLINGAANM Waddell; SimonAACI Oro ValleyAAST AZAACO USAAGP Waddell; Simon Oro Valley AZ USAANM Scherzinger; WilliamAACI Oro ValleyAAST AZAACO USAAGP Scherzinger; William Oro Valley AZ USAANM Birdi; Balwinder SinghAACI TucsonAAST AZAACO USAAGP Birdi; Balwinder Singh Tucson AZ USAANM Pearson; WayneAACI Oro ValleyAAST AZAACO USAAGP Pearson; Wayne Oro Valley AZ USAANM Kane; DavidAACI Oro ValleyAAST AZAACO USAAGP Kane; David Oro Valley AZ USAANM Phielix; TomAACI TucsonAAST AZAACO USAAGP Phielix; Tom Tucson AZ US - A wedge cooling apparatus and method for cooling a rotating machine, such as a generator, disperses a spray of cooling fluid into the wedges of the generator. The spray cooling method results in a high heat transfer coefficient of about 2000-3000 W/m01-17-2013
20130015729ENHANCED SPRAY COOLING TECHNIQUE FOR WEDGE COOLINGAANM Birdi; Balwinder SinghAACI TucsonAAST AZAACO USAAGP Birdi; Balwinder Singh Tucson AZ USAANM Waddell; SimonAACI Oro ValleyAAST AZAACO USAAGP Waddell; Simon Oro Valley AZ USAANM Scherzinger; WilliamAACI Oro ValleyAAST AZAACO USAAGP Scherzinger; William Oro Valley AZ US - A wedge cooling apparatus and method for cooling a rotating machine, such as a generator, disperses a spray of cooling fluid into the wedges of the generator via a pipe that runs along the length of each of the wedges. The pipe may include a plurality of spray delivery devices to spray cooling fluid from the pipe to the inside of the wedges. The spray cooling method results in a high heat transfer coefficient of about 2000-3000 W/m01-17-2013
20130169077ELECTRIC ROTARY MACHINE - An electric rotary machine has a motor frame having a cooling fluid passage, a rotary shaft rotatably supported by the motor frame, a rotor fixed to the rotary shaft, and a stator. The stator has a core having a ring shape and a stator winding wound around the core. The stator core is arranged to face an outer periphery of the rotor in a radial direction. An inlet section and an outlet section are formed in the motor frame. Cooling fluid is introduced into the cooling fluid passage through the inlet section and discharged from the outlet section. A partition wall section is formed on the motor frame and divides the cooling fluid passage into a cooling fluid inlet passage and a cooling fluid outlet passage. Through an opening formed in the partition wall section, the cooling fluid inlet passage and the cooling fluid outlet passage communicate with each other.07-04-2013
20080224551Cooling an Electrical Machine - An electrical machine includes a stator and a rotor disposed in a housing of the electrical machine. The stator includes windings having a first set of end turns at a first end of the stator and having a second set of end turns at a second, opposing end of the stator. The stator has a substantially tubular shape and an interior lateral surface. The rotor extends through the interior of the stator. A flow inlet into a volume in the housing about the first end turns is located radially outside of the interior lateral surface of the stator. A flow outlet from the volume in the housing about the first end turns is located radially outside of the interior lateral surface. The inlet and the outlet are cooperatively arranged to communicate a flow of fluid substantially transverse across the first end of the stator.09-18-2008
20120248905ELECTRIC DRIVE UNIT - An electric drive unit for a motor vehicle has an electric machine and a lubrication and cooling circuit. The lubrication and cooling circuit includes an aqueous lubricant, which is passed at least through an internal area of the electric machine, in order to cool parts of the electric machine in the internal area.10-04-2012
20120248904UNIFORM CONTAINED COOLING FOR STATOR - A liquid-cooled stator and rotor assembly for use as an electric motor or generator includes a housing having a first end bell, a second end bell, and at least one fluid orifice in the first end bell. A stator is fixed within a stator cavity of the housing. The stator includes a stator core and a plurality of windings for conducting a flow of electricity. A rotor for magnetically interacting with the stator is also included, the rotor being rotatably mounted between the first end bell and the second end bell within a rotor cavity. A first sealing ring and a second sealing ring are provided to form a fluid seal against the respective end bells and against a portion of the stator such that a cooling fluid entering the stator cavity via the orifice does not enter the rotor cavity.10-04-2012
20130140923ELECTRIC MACHINE COOLING STRUCTURE - A housing surrounding a stator or a rotor includes an annular cooling chamber, which is formed within the housing and defines a circumferential fluid path around the stator or rotor. A fluid inlet and a fluid outlet are communication with the annular cooling chamber. A primary divider separates the fluid inlet from the fluid outlet.06-06-2013
20110221286ELECTRIC ROTATING MACHINE - An electric rotating machine includes a stator, a rotor, and a housing. The stator includes a stator core and a stator coil formed by laminating magnetic steel sheets. Each of the magnetic steel sheets has through-holes that are formed to penetrate the magnetic steel sheet in the axial direction of the stator core. All of the magnetic steel sheets are divided into groups each of which includes axially-adjacent n of the magnetic steel sheets, where n is an integer not less than 2. For each of the groups, corresponding n of the through-holes of the n magnetic steel sheets of the group communicate with one other to form an inside coolant passage. The inside coolant passage fluidically connects an outside coolant passage, which is formed between the housing and the radially outer surface of the stator core, with a corresponding one of the slots of the stator core.09-15-2011
20110248584Electric Machine - An electric machine is disclosed, which includes a stator having several end windings, a rotor and a cooling means transporting a liquid cooling medium. The cooling means axially projects out of the stator. At least the end windings are encased by a thermally conductive material. In one embodiment the cooling means is a duct-like pipe.10-13-2011
20130147289ELECTRIC MACHINE MODULE COOLING SYSTEM AND METHOD - Some embodiments of the invention provide an electric machine module. The module can include a housing, which can define a machine cavity. In some embodiments, a coolant jacket can be at least partially positioned within the housing. Some embodiments include a sleeve member at least partially surrounding the coolant jacket. In some embodiments, a stator assembly including stator end turns can be at least partially disposed within the housing and can be at least partially circumferentially surrounded by the coolant jacket. Some embodiments provide at least one coolant apertures being in fluid communication with the coolant jacket. Some embodiments can include at least one end turn cavity at least partially surrounding a stator end turn and fluidly coupled to the coolant jacket via at least one coolant aperture. In some embodiments, the at least one end turn cavity is in fluid communication with the coolant jacket and the machine cavity.06-13-2013
20130147290MAGNETIC STEEL COOLING STRUCTURE FOR PERMANENT MAGNETIC MOTOR OF ELECTRIC VEHICLE AND COOLING METHOD THEREOF - A magnetic steel cooling structure for permanent magnetic motor of electric vehicle, which comprises a rotor core, magnet steels, and at least one heat pipe, the magnet steels are mounted in the rotor core, the heat pipe has an inner cavity inside which is contained a phase change material, the heat pipe is mounted in the rotor core and the outer wall of the heat pipe is contacted with the rotor core tightly, the inner cavity is inclined with respect to the axis of the rotor core06-13-2013
20100283334GENERATOR MAIN STATOR BACK-IRON COOLING SLEEVE - A main stator sleeve for a generator includes a sheet of material that includes an arcuate notch one two opposed edges such that a butt joint therebetween defines a pin aperture.11-11-2010
20120256501OIL COOLED GENERATOR - An oil cooled generator may have stator windings with first portions in contact with a stator core and second non-contact portions. One or more nozzles may be configured to provide a spray pattern of oil which impinges on the non-contact portions even though the nozzles may have orifices oriented so that the lines projected in alignment with longitudinal axes of the orifices do not intersect the non-contact portions of the stator windings.10-11-2012
20120274160ROTARY ELECTRIC MACHINE WITH AIR GAPS CONFIGURED TO CANCEL TORQUE PULSATIONS - A rotary electric machine includes a stator having stator windings; and a rotor rotatably disposed in the stator, said rotor having a rotor core provided with a plurality of magnets and a plurality of magnetic auxiliary salient poles formed between poles of the magnets. In this rotary electric machine: a magnetic air gap is provided in an axial direction of the rotor in a position shifted in a circumferential direction from a q axis passing through a center of the magnetic auxiliary salient pole within the magnetic auxiliary salient pole; and an amount of shifting the magnetic air gap from the q axis in the circumferential direction differs according to a position of the magnetic air gap in the axial direction so as to cancel torque pulsation in energization caused due to the magnetic air gap.11-01-2012
20120274159COOLING ARRANGEMENT FOR AN ELECTRIC MACHINE - The electric machine includes a stator. The stator includes stacked lamination plates. The lamination plates form at least two lamination packages. The electric machine includes a first cooling circulation with a first cooling fluid. The stator of the electric machine includes a second cooling circulation with a second cooling fluid. A heat exchanger is part of the second cooling circulation and is arranged to connect the first cooling circulation and the second cooling circulation. Thus heat is transferred from the first cooling fluid to the second cooling fluid. A spacer element is arranged between the two lamination packages. The spacer element is prepared to set a predetermined distance between the lamination packages, thus the first cooling fluid is allowed to flow between the lamination packages. The heat exchanger arrangement is an integral or at least partly integrated part of the spacer elements.11-01-2012
20110234029COOLING ARRANGEMENT FOR AN ELECTRIC MACHINE - An electric machine includes a stator having an outer circumference. Spaced apart first walls are arranged about the outer circumference and provide generally parallel first channels. A second wall adjoins the first wall and is arranged about the outer circumference providing a second channel in fluid communication with the first channels, thus, providing a tortuous fluid flow path about the circumference. The first and second channels have an inner surface. A structure is provided within at least one of the first and second channels. The structure has an outer surface spaced radially outward from the inner surface and at least partially defines the tortuous flow path between the outer and inner surfaces. The stator includes an end turn. An end cap extends axially and radially outward from the stator and provides an enclosure about the end turn in fluid communication with the exit associated with the flow path.09-29-2011
20110309698Electric Motor Assemblies Including Stator and/or Rotor Cooling - An electric motor assembly including a stator having a stator core and windings around the stator core is disclosed. The stator core has opposing ends and an outer surface extending between the opposing ends. The electric motor assembly also includes a housing having an inner surface enclosing at least a portion of the stator, and at least one fluid passage between the outer surface of the stator core and the inner surface of the housing. The fluid passage permits a coolant in the fluid passage to contact one or more portions of the outer surface of the stator core to remove heat from the stator core during operation of the electric motor assembly. Additional motor assemblies including stator and/or rotor cooling features are disclosed.12-22-2011
20110309697ELECTRIC MOTOR ASSEMBLIES INCLUDING STATOR AND/OR ROTOR COOLING - An electric motor assembly including a stator having a stator core and windings around the stator core is disclosed. The stator core has opposing ends and an outer surface extending between the opposing ends. The electric motor assembly also includes a housing having an inner surface enclosing at least a portion of the stator, and at least one fluid passage between the outer surface of the stator core and the inner surface of the housing. The fluid passage permits a coolant in the fluid passage to contact one or more portions of the outer surface of the stator core to remove heat from the stator core during operation of the electric motor assembly. Additional motor assemblies including stator and/or rotor cooling features are disclosed.12-22-2011
20130187492WHEEL-HUB MOTOR COOLING - A wheel-hub motor (07-25-2013
20130187491ROTOR FOR AN ELECTRIC MACHINE - A rotor form electric machine is provided including a rotor body that rotates about an axis of rotation, the rotor body having a superconducting rotor winding and cooling arrangement provided for cooling the rotor winding having at least one pair of cooling tube loops disposed substantially radially opposite each other on the rotor body, wherein a cryogenic coolant is transported in the axial direction in the coolant tube loops from a first axial rotor end to a second, opposite axial rotor end and back when the rotor rotates about the axis of rotation. One or more connecting tubes are provided in the cooling arrangement and connect one cooling tube loop to the other cooling tube loop of the at least one pair of cooling tube loops.07-25-2013
20130193786SR MOTOR ALTERNATIVE COOLING DEVICE AND METHOD - 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.08-01-2013
20120043836Disk Style Centrifugal Pump - An electric machine system includes an electric motor and an oil pump disposed within a housing. The oil pump is configured to disperse oil in a pattern about a rotational axis within the electric motor. A method for operating the electric machine system is also disclosed.02-23-2012

Patent applications in class Liquid coolant