Abstract: A dynamoelectric machine pressurization apparatus is disclosed. In one embodiment, the apparatus includes a dynamoelectric machine air shield including a channel configured to fluidly connect an outlet of a rotor fan with an ambient air source.

Abstract: Embodiments of the invention provide an electric machine module and a method for cooling an electric machine. The electric machine module includes an electric machine and a housing enclosing the electric machine within a machine cavity. The housing can include at least one end cap positioned axially adjacent to the electric machine and including a shroud protruding into the machine cavity. The shroud can include a step with an angled rotor feed path.

Abstract: A motor driven assembly includes a motor having a motor inlet and a motor outlet, a shaft, and a rotor spaced radially outwards from the shaft. A cooling flow passage is located between the shaft and the rotor. The cooling flow passage fluidly connects the motor inlet and the motor outlet. A compressor is in fluid communication with the motor outlet. The compressor includes a compressor outlet that is in fluid communication with the motor inlet.

Abstract: In a coolant-cooled linear motor includes an armature including armature windings and a cooling jacket arranged to surround the armature windings, the cooling jacket unit includes four cooling jackets defining four side faces parallel to the extension direction of the armature and two end blocks defining two opposite end faces in the extension direction of the armature, the cooling jackets and the end blocks being connected to one another in a box shape. Each of the cooling jackets has an internal space to be supplied with a coolant; and a field magnet unit includes a yoke made of a ferromagnetic material and permanent magnets arranged in the yoke, one of the armature and the field magnet unit making relative movement with respect to the other.

Abstract: 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.

Abstract: Embodiments of the invention provide an electric machine module comprising an electric machine with a stator and housing at least partially circumscribing the electric machine. The housing includes at least two housing members coupled together and substantially securing the electric machine within the housing. The electric machine module also includes a coolant jacket at least partially defined by an outer diameter of the stator and an inner diameter portion of the housing.

Abstract: A cooling system, a motor handling system, and a method of positioning a motor in a cooling system are disclosed. The motor handling system includes a suspension feature configured to engage a support member, the support member positioned partially below a cooler. The motor handling system permits positioning of a motor in a first position and re-positioning of the motor to a second position. The cooling system includes a cooler, a support member positioned partially below the cooler, and a motor handling system. The method of positioning includes engaging a support member of a cooling system with a suspension feature, positioning the motor at a first position, and re-positioning the motor at a second position.

Abstract: Provided is a paper shredder comprising a housing (6) and a paper shredder head (4), wherein a transmission mechanism (5) and a motor are provided in the paper shredder head (4); the motor comprises a motor body (1), the motor body (1) having an output shaft (12) and a motor housing (11) sleeve connected on the output shaft (12); the motor housing (11) is provided with a heat dissipation device, the heat dissipation device comprising an air intake device (2) and an air output device (3); the air intake device (2) has a cold air inlet and the air output device (3) has a hot air outlet; the air intake device (2) is provided on one side of the output shaft (12) and the air output device (3) is provided on the other side of the output shaft (12); at the position where the air intake device (2) is provided on the motor housing (11) there is an air intake hole (13) opened correspondingly to communicate with an inner chamber of the motor housing (11), and at the position where the air output device (3) is provided o

Abstract: 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.

Abstract: A stator for a rotary electric machine, the stator including a jacket and a stack of stator laminations placed inside the jacket, subassemblies of laminations of the stack having extensions with flow channels for passing a cooling fluid therethrough, the subassemblies being disposed in such a manner that fluid flowing along the stack is subjected to a succession of passes within the channels and of passes through wide zones extending between the channels, the stack laminations being arranged in such a manner that for at least one extension, and better for the majority, or even all of the extensions of a subassembly, the flow section made available to the flow of cooling fluid within the extension is greater than the flow section defined by the space extending radially between the extensions and the jacket.

Abstract: Drive assemblies for electric devices, such as vehicles, include an electric motor that includes a rotor assembly and a stator assembly positioned within the rotor assembly. The stator assembly is fixed to a stationary axle and includes a pole and a coil around the pole. The rotor assembly includes a housing to which a plurality of magnets are attached. The rotor assembly is supported on the stationary axle by bearings. A drive mechanism, such as a sprocket, pulley or gear is provided on the housing of the rotor assembly and rotates with the housing. In various embodiments, the stationary axle includes an internal bore for receiving coolant, a longitudinal rib within the internal bore, and longitudinal channels in its outer surface.

Abstract: A cooling structure for a stator configured with a cooling medium distributing member formed with a plurality of discharge openings, and a distributing path, wherein the distributing path has a plurality of chambers separated by a partition wall, and an inter-chamber communication passage that is formed in the partition wall and communicates between the adjacent chambers. The cooling medium distributing member includes at least one cooling medium distributing chamber that divides the distributing path to a plurality of inter-chamber communication passages, and also includes a plurality of discharge chambers. The plurality of inter-chamber communication passages formed in the partition wall are formed with a ratio of an opening width between the different inter-chamber communication passages set according to a ratio of a sum of opening cross-sectional areas of all of the cooling medium discharge openings which are located downstream of each of the inter-chamber communication passages.

Abstract: For providing a permanent magnet type generator that has a limited inside temperature rise gradient even if the capacity thereof is increased and permits to reduce the size thereof, the present invention provides a ventilation means that increases the inner gas (air or cooling wind) quantity that is caused circulated via the heat exchanger causing to flow outer air is increased more at a region facing the outer air exhaust side in the heat exchanger than at the outer air inlet side.

Abstract: An electric motor is provided with a hollow rotating drive shaft extending along the central axis of the motor, a stationary liquid supply line and a rotating union which communicates with the liquid supply line and the hollow interior of the drive shaft for supplying liquid to the hollow interior of the drive shaft.

Abstract: A brushless direct current (BLDC) motor has a 3-phase winding 20 and six stator teeth 14, 15 with alternate stator teeth 14 being wound and the remaining stator teeth 15 being left unwound. The winding 20 has three legs, one for each phase and each leg has one coil 22 wound about one of the stator teeth 14. Each leg has a first end A,B,C, arranged to receive electrical power and a second end X,Y,Z, which is connected to the second end of the other legs to form a star connection 24. Selected stator teeth have grooves in a face thereof dividing those teeth into a plurality of stator poles. The motor may be used to drive a fuel pump for an internal combustion engine, typically for a vehicle.

Abstract: A power tool has a casing and a motor assembly installed within the casing. The motor assembly comprises a motor, a heat dissipation device, a fan and a guiding member. The motor has a stator and a rotor. The heat dissipation device has an annular heat absorbing section which is fitted to a housing of the stator and a plurality of fins extending from the heat absorbing section for dissipating heat. Air flow generated by the fan is guided to the fins of the heat dissipation device by the guiding member to cool the motor.

Abstract: The stator of a fluid cooled electric machine, such as a motor, a generator, or a motor/generator assembly, includes an annular stator core including inwardly projecting teeth and external grooves in an outer surface of the core that are radially aligned with the teeth. Electrically conductive windings are mounted on the inwardly projecting teeth, and a pipe assembly for coolant has a pipe formed into a serpentine shape. The pipe includes axially extending pipe portions received in the external stator core grooves, and end turns interconnecting adjacent pairs of the axially extending pipe portions. Heat conduction elements are secured to the end turns of the coolant pipe, and a housing surrounding the outer surface of the stator core retains the axially extending pipe portions within the external grooves.

Abstract: 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.

Abstract: Provided is a brushless AC generator for a vehicle, with improved cooling performance for an exiting core and an exciting coil. In the brushless AC generator for the vehicle, a rotor includes: magnetic-pole cores fixed to a shaft; a cylindrical exciting core fixed to a rear bracket, the exciting core being inserted into one of the magnetic-pole cores; and an exciting coil formed by winding a conductor around a minor-diameter portion of the exciting core. The rear bracket includes: vent holes for the rotor, through which cooling air generated by rotation of a cooling fin passes, the vent holes for the rotor being formed around a bearing housing portion for housing a rear bearing therein; and a guiding portion including an air duct for guiding the cooling air, which has passed through the vent holes for the rotor, to the exciting core.

Abstract: A cooling structure of a generator motor includes: a rotor holder; a rotor core; a first blade; and a second blade, wherein the second blade includes a recessed coolant holding portion, provided on an outer circumference of the second blade on an opposite side to the rotor core and opening inward in the radial direction, for collecting a coolant, and a drain hole radially penetrating an outer circumference of the coolant holding portion for draining the coolant collected in the coolant holding portion.

Abstract: Embodiments of the invention provide an electric machine module including an electric machine. The electric machine includes a stator assembly with a plurality of stator laminations. The plurality of stator laminations include a plurality of different outer diameters and some of the plurality of stator laminations include at least two different radii. At least one circumferential coolant channel and at least one axial coolant channel can be defined by the plurality of stator laminations. The at least one circumferential coolant channel can be defined substantially around a circumference of the stator assembly and the at least one axial coolant channel can be defined substantially along an axial length of the stator assembly.

Abstract: A lubrication structure of a generator motor, includes: at least two bearings rotatably supporting an input/output shaft of the generator motor; a gap provided between the two bearings; a cylindrical-shaped bearing attaching member attached to inner peripheral parts of the two bearings; and a through hole penetrating the bearing attaching member outward in a radial direction and opening in a position overlapping with the gap.

Abstract: An electric machine including a housing, and a stator mounted relative to the housing. The stator includes a body including a first end portion that extends to a second end portion and a plurality of stator windings that extend between the first and second end portions. A sleeve member is mounted to the stator and covers a portion of the stator windings at one of the first and second end portions. The sleeve member is configured and disposed to guide a coolant over the portion of the stator windings to remove heat from the stator.

Abstract: A linear motor armature in which pressure loss of a coolant flowing in a cooling conduit and possible significant non-uniformity in temperature distribution are reduced over the entire armature. A manifold 5, 6h and a pair of cooling conduits 7, 9 are configured such that a coolant is supplied from one connecting conduit 27 of the cooling conduit 7, and one connecting conduit 33 of the cooling conduit 9, and discharged from the other connecting conduit 29 of the cooling conduit 7 and the other connecting conduit 35 of the cooling conduit 9.

Abstract: A linear motor mover with heat dissipation unit includes: a base seat; a mover having several coils sequentially upright arranged with first ends of the coils disposed in the base seat; a heat dissipation unit having a hollow and substantially slat-shaped cooling section, one face of the cooling section being immediately adjacent to second ends of the coils opposite to the base seat, whereby the heat generated by the coils during operation of the mover can be conducted from the coils to the cooling section, the cooling section containing a cooling fluid therein, the cooling fluid flowing within an interior of the cooling section to carry away the heat absorbed by the cooling section; and an insulation section disposed between the heat dissipation unit and the coils. With the heat dissipation unit, the linear motor has better heat dissipation efficiency and driving efficiency and is assembled at lower cost.

Abstract: A submersible electric motor has feature to enhance thermal conductivity from the motor interior to the exterior. The motor has a cylindrical housing and a stator rigidly mounted within housing. A rotatable rotor is located within the stator. A gap formed between the stator's outer diameter and the inner wall of the housing is filled with a high thermal conductivity material to improve heat transfer from the motor. The remaining portion of the housing may be filled with a dielectric lubricant that has lesser thermal conductivity than the high thermal conductivity material.

Abstract: A resistance to ground monitoring system for a magnetic bearing is disclosed. The system includes a dummy bearing arranged in a cooling loop and having a dummy bearing coil made up of an electrical winding that is configured to detect the resistance to ground for the dummy bearing coil. The electrical winding is communicably coupled to a sensing device that monitors the resistance to ground for the dummy bearing coil. Since the magnetic bearing is arranged within the same cooling loop, the resistance to ground for the dummy bearing coil is indicative of a resistance to ground for the radial bearing coils of the magnetic bearing.

Abstract: Embodiments of the invention provide an electric machine module including an electric machine which can include a stator assembly. The stator assembly can include stator end turns. Some embodiments can provide a housing at least partially enclosing the electric machine and the housing can at least partially define a machine cavity. Further, at least one baffle can be coupled to the housing at a region near the stator end turns, so that the at least one baffle surrounds a portion of a perimeter of the stator end turns.

Abstract: A closure bottom plate 1 for electric pump 100, in particular for a boiler circulation centrifugal pump, is made of a cup-shaped motor cover 2 and a connector-holder cover 3. The bottom plate 1 has an internal aeration path 4, intended to allow the circulation—by natural convection—of air which is heated during the operation of the electric pump 100 preventing the formation of condensate inside the bottom plate 1. The internal aeration path 4 is extended between at least one inlet opening 22 arranged on the motor cover 2 and an outlet opening 36, successively crossing the internal volume of the motor cover 2, the coupling opening 21, and a labyrinth 32 defined by the connector-holder cover 3.

Abstract: The invention relates to a dynamoelectric machine (1) comprising a stator (2) and a rotor (3). At least the stator (2) has a winding system (4) which is arranged in grooves of the stator (2). Heat is transferred in a substantially radial direction on the front sides (6) of the stator (2) by means of heat pipes (5).

Abstract: A cooling system is provided for an electric motor having control circuitry and including a motor housing surrounding the motor. The motor drives at least one radial fan at one end thereof for directing airflow through the motor housing across the motor. A fan housing encloses the cooling fan and defines a diverter chamber radially outboard of the fan that is sized to divert a portion of the airflow away from the electric motor. A control box contains the control circuitry and includes a base having a heat sink for contacting the control circuitry. The base defines a plenum in communication with the diverter chamber and a channel in communication with the plenum and the heat sink to direct the diverted airflow across the heat sink.

Abstract: A rotating electrical machine includes a flange provided at one end of a substantially rectangular, hollow frame in an axial direction; a lid provided at the other end of the frame in the axial direction; a rotor including a shaft, the shaft being rotatably supported by the flange and the lid; a stator fixed to an inner section of the frame, the stator surrounding the rotor; and a plurality of fans provided on opposite side surfaces of the frame in a plan view of the frame as viewed in the axial direction.

Abstract: According to an aspect of the present invention, there is provided a power tool including: a motor that generates a rotational force; a power transmission mechanism that is driven by the motor to transmit the rotational force and that is connected to a bit; and a housing that houses the motor and the power transmission mechanism therein, wherein an electric fan for cooling the power transmission mechanism or the motor is provided inside the housing, wherein the power transmission mechanism, the motor and the electric fan are arranged in this order from front, and wherein the electric fan is disposed at a rear side so as to be interposed between the motor and a back wall of the housing.

Abstract: A heat-dissipation structure for a motor. The heat-dissipation structure comprises a shaft, a seat and a rotator. The rotator coupled to the seat by the shaft comprises a housing and a cover. The housing comprises an inner side connected to the shaft and a bottom comprising at least one through hole. The cover is connected to an exterior of the bottom of the housing and a distance is formed between the cover and the housing, so that the cover prevents objects from entering the through hole.

Abstract: The invention relates to a compressor system (1), particularly for conveying gases or gas/oil mixtures in the offshore area, with a seawater-tight housing (2) with at least one access opening (3) for gases or gas/oil mixtures which are to be compressed, and with at least one outlet opening (4) for the compressed gases or gas/oil mixtures. In the housing (2), a compressor (8) is disposed, which is connected at the inlet side to the access opening (3) and, at the outlet side, to the outlet opening (4). An electric motor (7), which has a stator assembly (71) and a rotor assembly (72) for driving the compressor (8), is disposed in the housing (2). According to the invention, the stator assembly (71) can be cooled over an inner side (GI) of the housing (2) of the compressor system (1).

Abstract: A vehicle drive device (1) comprises a motor unit which is provided with a motor case (10), a motor cover (23), a stator (20), a rotor (24), a rotor shaft (25), a resolver (15) for detecting the rotation angle of the rotor (24), a temperature sensor (12) for detecting the temperature of a stator coil (21), a rotor bearing (17) for supporting the rotor shaft (25), a terminal base (11) to which the terminals of U-phase, V-phase, and W-phase from the end of the coil are connected, and to which a resolver harness (14) and a temperature sensor harness (13) are also connected, and a delivery pipe (30) which has a clamp part (35) for holding the resolver harness (14) and delivers a cooling oil to the end of the coil.

Abstract: A radial flux permanent magnet AC motor/generator employs a flat circular stator plate having a plurality of separately-formed electromagnets mounted in a ring pattern on a top surface thereof. A circular flux ring fabricated of powdered metal is mounted to the stator plate outside the ring of electromagnets. A plurality of permanent magnets are mounted in a ring pattern on the outer cylindrical surface of a steel rotor. The stator plate and rotor are axially and diametrically aligned such that the ring of permanent magnets rotates in close proximity to and inside the ring of electromagnets. The electromagnets utilize powder metal cores shaped to have rounded corners and flat sides that permit the use of heavier gauge windings and eliminate the air gaps that exist between the core and windings of prior art electromagnets.

Abstract: A power plant for a jet-type model airplanes and UAVs includes an electric motor and a cover. The cover receives a portion of the electric motor and a sleeve into which the electric motor is inserted. The sleeve has a plurality of fins to dissipate heat and create openings into the cover. Air from the fan rotor passes through the openings to cool an electronic speed control member and exits a rear opening in the cover. The cover may also have additional openings for air to enter into the cover.

Abstract: Machines and motors with multiple three-phase AC power connections. A motor includes first, second, and third windings arranged to drive a rotator shaft. A first end of each winding is connected to a respective power input of a three-phase alternating current (AC) power source and a second end of each winding is connected to a neutral. The motor includes at least one intermediate tap connected to each of the first, second, and third windings at substantially equal respective distances between the neutral and the respective power inputs. The intermediate taps together provide a three-phase AC power output at a voltage that is less than the voltage of the three-phase AC power source.

Abstract: A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core.

Abstract: 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.

Abstract: Embodiments of the invention provide an electric machine module including a housing. The housing can include 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 a stator core with slots, a weld end, and an insertion end. In some embodiments, conductors can be positioned in the slots so that portions of the conductors extend from the weld end and the insertion end. An insulation member including recesses can be coupled to at least a portion of the conductors that extend from the weld end of the stator assembly.

Abstract: An arrangement for cooling an electrical machine is provided. The electrical machine includes a rotor and a stator, an air-gap being between the rotor and the stator. The stator includes a plurality of stacked laminate-plates. The laminate-plates include on a first side, which is facing the air-gap, a plurality of slots containing metal-windings of a stator-coil. The laminate-plates are positioned and fixed by a structural support and by end-plates in relation to a central-part of the stator. A joint cavity is formed by the end-plates, the central-part of the stator and an internal surface of the laminate-plates. The internal surface is defined by a second side of the laminate-plates, the second side being opposite to the first side. The cavity is coupled with an air-cooling-arrangement, which is arranged and used to circulate a cooling gaseous medium from the cavity to the air-gap and the laminate-plates back into the cavity.

Abstract: A thermal system is disclosed in thermal communication with an electrical device. In one form the thermal system is a refrigeration system having a compressor, condenser, and evaporator. The electrical device can be disposed within the thermal system such that a working fluid of the thermal system exchanges heat with the electrical device. In one embodiment the thermal system includes a container in which the electrical device is disposed. The working fluid in the container can, but need not, remain in substantially the same physical state when transferring heat with the electrical device.

Abstract: An apparatus is provided that includes a thermoelectric generator and an exhaust gas system operatively connected to the thermoelectric generator to heat a portion of the thermoelectric generator with exhaust gas flow through the thermoelectric generator. A coolant system is operatively connected to the thermoelectric generator to cool another portion of the thermoelectric generator with coolant flow through the thermoelectric generator. At least one valve is controllable to cause the coolant flow through the thermoelectric generator in a direction that opposes a direction of the exhaust gas flow under a first set of operating conditions and to cause the coolant flow through the thermoelectric generator in the direction of exhaust gas flow under a second set of operating conditions.

Abstract: 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.

Abstract: An example method of reducing loads on a connection shaft includes disengaging a connection shaft from a motor-generator such that the connection shaft is not rotatably coupled to the motor-generator. The method communicates a fluid away from the motor-generator through a communication path established within the connection shaft. An example turbomachine connection shaft is configured to selectively rotatably couple a turbomachine rotor and a motor-generator. The connection shaft establishes a communication path that selectively vents the motor-generator.

Abstract: A vehicle alternator comprises a rotor and a stator positioned within a housing. The housing includes a front face, a rear face, and a outer wall extending between the front face and the rear face. The front face includes a plurality of air inlet holes, and the rear face including a plurality of air outlet holes. The outer wall is void of air holes that extend through the outer wall. The rotor is positioned within the housing and configured to rotate about an axis. The stator is positioned within the housing between the rotor and the outer wall of the housing. The stator includes a core with an outer surface, a front end and a rear end. A plurality of substantially axial air passages are positioned between the outer wall of the housing and the outer surface of the stator core.

Abstract: Embodiments of the invention provide an electric machine module and a method for cooling an electric machine. The electric machine module includes the electric machine including a stator with stator end turns and a housing enclosing the electric machine. An inner wall of the housing defines a machine cavity. The electric machine module also includes a cover coupled to the housing and extending radially inward into the machine cavity. The cover and the stator end turns define a stator cavity which is in fluid communication with the machine cavity.

Abstract: The axial piston pump is provided with two annular seals mounted in the housing and sealingly engaging the piston to define a sealing fluid zone therebetween. An annular ring is provided between the seals to control the flow of sealing fluid through the fluid zone. This ring includes an internal helical flush duct for guiding the sealing fluid helically about the piston from one end of the ring to the other end of the ring.

Abstract: Disclosed is a system for thermally conditioning and pumping a fluid. The system includes a thermoelectric heat exchanger having a thermoelectric device configured to pump heat. Heat exchangers are provided for transferring heat to and from the thermoelectric device and for generating a fluid flow across the thermoelectric device. The conditioned fluid may be placed in thermal communication with a variety of objects, such as a vehicle seat, or anywhere localized heating and cooling are desired. Thermal isolation may also be provided in the direction of flow to enhance efficiency.