Abstract: The present disclosure relates to a stator core applied to an electric motor, and more particularly, to a stator core design having improved cooling performance. In the segmented stator core of the present disclosure, since the coil inside the slot having a temperature higher than that of the end coil is cooled, the risk of damaging the insulating portion may be reduced, and since both the end coil and the coil inside the slot may be cooled, a load is small even if a high current is applied, and thus, the power may be increased in the same motor size or the motor size based on the same power may be reduced.

Abstract: An electrical conducting plate structure for axial fan includes a fan having a frame that internally defines an airflow passage; a base, a plurality of stationary blades, and a plurality of and conductor thin plates provided in the airflow passage; and a circuit board mounted on the base. The stationary blades are extended between and connected to the frame and the base, and the conductor thin plates are located between two adjacent stationary blades to extend across the airflow passage with two ends connected to the circuit board and the fan frame respectively. Since the conductor thin plates respectively have a thin and flat configuration, their upwind area against the airflow flowing through the airflow passage is minimized, which effectively reduces the fluid resistance in the airflow passage and enables upgraded fan static pressure and output air volume and reduced noise possibly produced by the fan in operation.

Abstract: The present disclosure provides a motor assembly. The motor assembly includes a motor including a housing, and a heat exchanging apparatus configured on the motor and fluidically coupled to the housing. The heat exchanging apparatus includes a primary compartment adapted to receive a working fluid from the housing, a first compartment adapted to receive a first portion of the working fluid from the primary compartment and transfer the first portion to the housing, and a second compartment adapted to receive a second portion of the working fluid from the primary compartment and transfer the second portion to the housing. The heat exchanging apparatus facilitates exchange of heat between the working fluid and a cooling fluid, such that the first and second portions of the working fluid being transferred to the housing is cooler that the working fluid received by the primary compartment of the heat exchanging apparatus.

Abstract: A vehicle brushless alternator assembly that includes a claw pole rotor assembly having a pair of opposing pole pieces. The rotor defining an axis of rotation, each of the pole pieces having multiple circumferentially spaced pole fingers extending axially. The pole fingers of the rotor alternating between north and south magnetic polarities upon energization of a field coil. The assembly including a cylindrical stator including armature enveloping the magnetic claw poles, the stator arranged coaxially relative to the drive shaft. The field coil positioned relative to said rotor to generate magnetic flux and the field coil including a first field winding electrically connected with a second field winding by a switch such that: in a first operable configuration the switch operates to electrically connect the field windings in series during energization and in a second operable configuration the switch operates to electrically connect the field windings in parallel during energization.

Abstract: The present disclosure provides a rotor unit, a rotor, and a motor structure. The rotor unit includes: a rotor punching sheet; a plurality of magnet units comprising a magnet and arranged on the rotor punching sheet; and a hole structure arranged in the magnet. The rotor includes a plurality of rotor units. The motor structure includes: the rotor, a first flow guide plate having a central hole and arranged between two adjacent rotor units, and a central shaft passing through a center of the rotor and the central hole. The present disclosure can effectively reduce the cost of the magnets, and can achieve a direct cooling of the magnets, the rotor and the stator, reduce the eddy current effect, reduce costs, and greatly expand an optimization and use range of the motors when applied in the motors.

Abstract: An electric drive for a vehicle comprises a housing, an electric machine with a stator connected to the housing and including stator end-windings, a rotor rotatable relative to the stator, and a driveshaft connected to the rotor and rotatably supported in the housing about an axis of rotation, a transmission to transmit a rotary movement from the driveshaft to drive a driveline of the vehicle, and a hydraulic circuit for circulating a fluid.

Abstract: A stator includes a stator core and a seal kit. The stator core includes a yoke part and a plurality of tooth parts. A tooth root of the tooth part is connected to the yoke part. A tooth top of the tooth part is away from the yoke part. An opening slot is formed between two adjacent tooth parts. The opening slot includes a coil slot and a flow passing slot that communicate with each other. The coil slot extends from the tooth top to the tooth root. The coil slot is configured to accommodate a stator coil. The flow passing slot extends from the tooth root to the yoke part. The seal kit is connected to an inner wall of the opening slot. The seal kit and the inner wall of the flow passing slot jointly form a flow passing passage for a coolant to flow through.

Abstract: A cooling frame for cooling an electric motor is provided. The cooling frame includes a header and a plurality of fluid conduits configured to carry a fluid and facilitate an exchange of heat between the fluid and the electric motor. The header includes at least one header port for exchanging fluid into or out from the header; a first plate comprising a central opening; and a plurality of conduit ports on the first plate positioned around the central opening, wherein each conduit port is fluidly connectable to a respective fluid conduit of the plurality of fluid conduits. The header also includes a first channel fluidly connecting the at least one header port and a first conduit port of the plurality of conduit ports, and a second channel fluidly connecting a second conduit port and the at least one header port.

Abstract: A rotor device for an electric machine, comprising: a rotor which comprises a rotor laminated core having a plurality of pole legs which project radially from a central axis of the rotor and can be wrapped around by respective rotor windings; at least one cooling fluid line, which extends in the circumferential direction between adjacent pole legs with its longitudinal extension direction parallel to the central axis of the rotor, and which is designed for a cooling fluid to flow through it for cooling of the rotor; and at least one collecting ring, which is provided on an end face of the rotor and is designed to collect cooling fluid flowing along the end face and to supply it to the at least one cooling fluid line.

Abstract: A rotating electric machine system is equipped with a rotor including permanent magnets and a rotating shaft. The rotating shaft is supported in a rotating electric machine housing via a first bearing and a second bearing. A first oil supply passage is formed in the rotating electric machine housing for supplying lubricating oil to the first bearing and the second bearing. Further, a rotor internal oil passage is formed in the interior of the rotor. A portion of the lubricating oil is diverted away from the first oil supply passage, and is supplied to the rotor internal oil passage.

Abstract: The rotating electric machine includes a stator having a stator core around which a plurality of coils are wound; a rotor supported to be rotatable relative to the stator with a predetermined gap therebetween; a rotor case that holds the rotor; and a first bearing and a second bearing that rotatably support the rotor case. The rotating electric machine includes: a first flow path formation body that forms a first flow path through which a refrigerant flows to a coil end part protruding from the stator core; a first case part which forms an accommodation space of the first bearing, is connected to the first flow path of the first flow path formation body, and fills the accommodation space with the refrigerant.

Abstract: An electric machine includes: a stator with an outer and an inner surface; a rotor disposed inside the inner surface of the stator and configured to rotate about an axis of rotation; a shaft oriented along and configured to rotate about the axis of rotation of the rotor and operably connected to the rotor; a frame integrated with the stator such that an outer surface of the frame is identical to the outer surface of the stator or a frame disposed outside the stator; and at least one fastenerless cover fixed to the outer surface of the frame without the use of fasteners.

Abstract: A laminated core for an electric machine includes a plurality of core laminations stacked one upon the other in a stacking direction and at least one thermally conductive insert, which is stacked between two core laminations in the stacking direction and has a higher thermal conductivity than the core laminations seated against it.

Abstract: The present disclosure relates to a fluid cooled electric machine, and a method for producing the same. The fluid cooled electric machine includes a shaft extending along an axis of the machine, a rotor rotationally coupled to the shaft, a stator radially surrounding the rotor and having a stator core, first and second end shields mounted at opposite ends of the electric machine in the axial direction, and a fluid cooling system for cooling the electric machine, the stator core having a plurality of axial cavities, the fluid cooling system including first and second collector bodies, each including a plurality of collector chambers for the fluid, and a plurality of pipes.

Abstract: The invention relates to a stator (1) of an electric machine (23), comprising a laminated core (3) on which stator teeth (4) and stator grooves (5) lying between the stator teeth (4) are formed and which comprises a plurality of laminations (6), wherein a single conductor (9) or a conductor bundle (10) comprising a plurality of conductors (9) is provided in each stator groove (5) in order to form an electric stator winding (8), wherein support points (11) which are mutually spaced in the axial direction are formed in the stator grooves (5) in order to support the conductor (9) or conductor bundle (10) lying in the respective stator groove (5), and at least one groove gap (14) is formed between the walls (4.2,5.

Abstract: A brushless motor (6) includes: a rotor (25), which rotates about a rotational axis (AX); and a stator (24), which is disposed around the rotor and comprises one or more coils (29). The rotor comprises a rotor core (31) and a rotor shaft (33), which is disposed in a shaft hole (60) of the rotor core. The rotor shaft includes: a thinner-diameter force-fitting segment (82), which is force-fit into the shaft hole with a first amount of force-fitting interference; and a thicker-diameter force-fitting segment (79), which is disposed at a location different from that of the thinner-diameter force-fitting segment in a front-rear direction parallel to the rotational axis and which is force-fit into the shaft hole with a second amount of force-fitting interference that is larger than the first amount of force-fitting interference.

Abstract: An electric motor includes a housing with an inner surface and an outer surface positioned radially outward from the inner surface. The electric motor includes a stator coupled to the inner surface, an electrical component coupled to the outer surface, and a cooling channel positioned within the housing between the inner surface and the outer surface. The housing is additively manufactured with the cooling channel formed therein. The electric motor includes a bus bar assembly formed as an axial stack.

Abstract: Systems and methods for electric machine cooling. The electric machine, in one example, includes a rotor that includes an outer circumferential surface with one or more spiral grooves, a stator that circumferentially surrounds the rotor and includes end windings, and an air passage radially extending from the stator to an air gap between the stator and the rotor. The electric machine further includes a cooling assembly configured to spray a coolant towards the end windings.

Abstract: An electric motor and related components, such as a motor controller assembly, are disclosed having a coolant circuit where the related components are cooled by the same fluid flow that cools the electric motor. The compact coolant circuit minimizes the need for external lines between the electric motor and related components, while providing separate heat sinks for the electric motor and, for example, a motor controller assembly. The liquid-cooled electric motor and related components may engage and power a variety of reduction output assemblies to form drive assemblies. The coolant circuit of the electric motor and its related components cooperates with an external coolant circuit to form a cooling system. The external circuit may include a radiator (e.g., heat exchanger or oil cooler) and an electric pump for the coolant which may cool one or more drive assemblies of a vehicle drive system.

Abstract: A device for cooling a motor can improve motor cooling performance with multiple cooling channels formed in a stator core of the motor, allowing a coolant to flow in both directions therethrough. The device is capable of maximizing motor cooling performance in such a manner that two or more multiple cooling channels are formed in a stator core with a separate coolant inlet and outlet. The coolant moves in a straight line in different directions along each cooling channel to cool the stator core, and thus the temperature gradient of the coolant is minimized to cool the entire area of the motor evenly.

Abstract: An electric machine, including a rotor having a rotor shaft and a rotor laminated core, a stator having a stator laminated core with recesses and stator windings disposed in the recesses of the stator laminated core, wherein coolant can flow through the recesses such that the stator windings can be directly cooled by the coolant, wherein channels are configured in the stator laminated core at a distance to the recesses such that the stator windings can be indirectly cooled by the coolant flowing through the channels, and a device via which a flow of coolant through the recesses and through the channels can be set depending on an operating point of the electric machine such that, at first operating points, the coolant can be conducted only through the recesses and, at second operating points, the coolant can be conducted at least through the channels.

Abstract: Methods and systems for an electric machine. The electric machine includes, in one example, a stator with end windings and a stator core and a cooling assembly with a spray ring that is directly coupled to an axial face of the stator core. In the electric machine, the spray ring is configured to spray a coolant at the end windings and includes a first section that extends down the axial face of the stator core and a second section that extends axially away from the stator core.

Abstract: An electric machine including a housing assembly including a first end and a second end, a stator, a rotor, and a fan is provided. The housing assembly includes a terminal box positioned at the first end, an end plate coupled to the terminal box and including a plurality of inlet apertures, and a casing coupled to the end plate and extending toward the second end. The stator is fixedly secured to the housing assembly and positioned within the casing. The rotor is rotatably secured to the housing assembly and positioned within the casing such that the stator and the rotor are separated within the casing by an air gap. The fan is positioned inside the casing and is configured to draw air into the housing assembly through the plurality of inlet apertures.

Abstract: Provided is a technology that can sufficiently suppress the temperature rise of a rotary electrical machine. A rotary electrical machine includes a main body part 10 including a rotator and a stator, and a casing part 20 that houses the main body part 10. The casing part 20 includes a first housing part 5 that surrounds the main body part 10 from a peripheral direction, and a second housing part 6 that houses a bearing for rotatably supporting a rotating shaft 2. The casing part 20 is formed with a cooling passage R extending from an inlet Rs for cooling medium to an outlet Re for cooling medium and not branching off in the middle. The cooling passage R includes a first cooling passage portion R1 that passes through the inside of the first housing part 5 and a second cooling passage portion R2 that passes through the inside of the second housing part 6.

Abstract: The invention relates to a motorization system for an electrically assisted craft which is intended to allow a user to be transported on water, the invention being used particularly in the field of surfboards, paddleboards or sailboards, and in the field of kayaks or canoes. The electric motorization system is configured to be connected to an electrical energy source and comprises, on the one hand, a watertight enclosure 1 which is intended to be integrated in or on a craft, in which enclosure 1 a rotor 2 and a stator 3, 7 are arranged, and, on the other hand, a shaft 4 which is connected at a first end to the rotor 2 and which protrudes in a watertight manner outside the enclosure 1 at a second end opposite its first end. The shaft 4 can be connected at its second end to propulsion means of a craft, such as a propeller, so that when the system is supplied with electrical energy, the rotor 2 is rotated and drives the shaft 4 with this rotation.

Abstract: A stator for a rotary electric machine. The stator includes: a tubular stator core and a coil including coil segments inserted in slots of the stator core. The coil segments include segment end portions outwardly protruding from an axial end face of the stator core. The coil includes welded portions each of which is constituted by the segment end portions that are welded to each other. The welded portions include a plurality of kinds of welded portions that are different from each other in a welded manner in which the segment end portions are welded to each other, such that the plurality of kinds of welded portions are arranged in circumferential direction of the stator core and/or in a radial direction of the stator core.

Abstract: A power assembly includes a rotor iron core, a gear set, a rotating shaft, and an oil-pumping system. The rotating shaft is fixedly connected to the rotor iron core and a driving gear in the gear set. The housing has an oil storage pool at a bottom and an oil collection tank at a high location, a part of a structure of a first gear in the gear set is located in the oil storage pool, and the first gear rotates to drive cooling oil in the oil storage pool to be raised and collected by the oil collection tank. The rotating shaft has a cooling oil channel inside. The cooling oil in the oil collection tank flows to the cooling oil channel, to dissipate heat from the rotor iron core.

Abstract: A motor assembly includes a housing, a first substrate, a second substrate, and a cover. The housing includes a tubular portion that accommodates a motor whose axis of rotation extends in the vertical direction. The first substrate opposes the radial outer end surface of the tubular portion in the radial direction. The second substrate extends perpendicularly to the axial direction and is above the motor. The cover includes a first cover portion that covers the radial outer end surface of the first substrate, and a second cover portion that covers the upper surface of the second substrate. The outer edge of the first cover portion as viewed from the radial direction and the outer edge of the second cover portion as viewed from the axial direction come into contact with the housing via a seal.

Abstract: A downhole motor includes a primary fluid path between a housing and a rotor and a secondary fluid path between the rotor and a stator. Fluid is diverted from the primary fluid path through a secondary inlet to the secondary fluid path to lubricate the motor. A magnet is located proximate the secondary inlet to bias magnetic particles in the drilling fluid away from the secondary inlet.

Abstract: A rotor assembly includes a shaft defining a lubricant inlet channel for receiving a lubricant and a lamination stack. The lamination stack is rotatably coupled to the shaft, extends between first and second lamination stack ends, and defines a lubricant cooling channel in fluid communication with the lubricant inlet channel. The rotor assembly also includes a first end cap adjacent to the first lamination stack end and a second end cap adjacent to the second lamination stack end. One of the first end cap and the second end cap defines an end cap inlet at a first radial distance from the shaft, a lubricant outlet channel defined to extend at least partially radially inward toward the shaft, and an end cap outlet at a second radial distance from the shaft which is less than the first radial distance for expelling the lubricant.

Abstract: An electrical machine assembly includes a shaft rotatable about an axis of an electric machine and first and second endcaps mounted to the shaft. The first endcap includes a first endcap coolant channel. The second endcap includes a second endcap coolant channel. A rotor is mounted to the shaft axially between the first and second endcaps. The rotor includes first rotor coolant channels and second rotor coolant channels. The first rotor coolant channels are configured to communicate liquid coolant that is received from the first endcap coolant channel axially through the rotor in a first direction. The second rotor coolant channels are configured to communicate liquid coolant that is received from the second endcap coolant channel axially through the rotor in a second direction that is opposite the first direction.

Abstract: The invention relates to a gas supply apparatus (21) having a shaft (23) which is rotatably mounted in a housing (22) using a gas bearing assembly (18) that is temperature-controlled with dispensing gas, and comprising a gas temperature-control device. In order to improve the gas supply apparatus (21) in respect of its manufacturing process and/or its functions, the gas temperature-control device is combined with a liquid temperature-control device (40) in an annular space (33) of the gas supply apparatus (21).

Abstract: A vehicle drive and control system for a vehicle having a prime mover and an operator control device such as a steering wheel is disclosed. A transaxle includes a power generating device in a transaxle housing and driven by the prime mover, an electric motor in the transaxle housing and powered by the power generating device, and at least one axle extending out of the transaxle housing and engaged to and driving one of a pair of driven wheels. A battery is powered by the power generating device, and connected to a controller. The controller is operatively connected to the operator control device and to the electric motor such that the controller controls electric motor output based on input received via the operator control device.

Abstract: A fan frame includes a housing, a shaft seat, a curved rib, a plurality of first ribs, and a plurality of second ribs. The shaft seat is disposed at the center of the housing. The curved rib is disposed between the housing and the shaft seat. The first ribs extend through the curved rib and connect the shaft seat to the housing, and the second ribs connect the curved rib to the shaft seat.

Abstract: A vehicle, electric machine, and method of manufacturing an electric machine include a stator having teeth extending from a yoke portion toward a rotor and defining slots between adjacent teeth with windings positioned within the slots, wherein the slots are coated with an electrically insulating material having an arcuate surface exiting the slots and extending at least partially over the teeth on at least one end face of the stator to form a winding guide for bending/positioning the windings. The winding guide may be formed by a molded epoxy that replaces insulating paper slot liners while providing a template for forming the hairpin bends of end windings.

Abstract: The present disclosure discloses a high-speed motor and an assembling method. The high-speed motor includes an air duct housing, a rotor subassembly, a stator subassembly, a bearing sleeve subassembly, and a fan blade. A mounting ring coaxial with the air duct housing is arranged at the middle right part in the air duct housing; several air guide plates are uniformly distributed between an outer wall of the mounting ring and an inner wall of the air duct housing; a bearing sleeve mounting cavity, a bearing mounting cavity, and a stator mounting cavity being respectively arranged at a left part, a middle part and a right part in the mounting ring; the rotor subassembly is coaxial with the mounting ring and is mounted in the mounting ring in a horizontal direction. The present disclosure has the advantages of reducing the resonance, lowering the noise, and the like.

Abstract: A rotor for an electric machine including a shaft having a first end, a second end, an outer surface and an inner surface that defines a passage extending between the first end and the second end. A plurality of rotor laminations is mounted to the outer surface of the shaft. A plurality of windings extends about the plurality of rotor laminations. The plurality of windings includes a first end turn arranged proximate the first end and a second end turn arranged proximate the second end turn. An end turn support is arranged at one of the first and second end turns. The end turn support includes a cooling circuit fluidically connected to the passage. The cooling circuit includes an outlet that directs coolant onto the one of the first and second end turns.

Abstract: A rotor and a method of making such a rotor, wherein the rotor has a shaft, a longitudinal axis, and a rotor packet connected to the shaft at least in torsion-resistant manner. The rotor packet is assembled from individual sheet lamellae, wherein the rotor packet has an opening for receiving the shaft. The shaft is a hollow shaft with a wall, wherein the wall of the shaft has, on its side facing toward the opening, recesses extending in the longitudinal direction. An electric motor, in particular a synchronous or hybrid synchronous machine, including a rotor and a stator, has such a rotor. The recesses are produced by cutting methods, in particular milling, or reshaping methods, in particular pressing.

Abstract: A cooling radiator intended to be incorporated in a motorized fan unit of a motor vehicle. The cooling radiator includes a transverse wall extended perpendicularly at its perimeter by a peripheral wall so as to define an internal volume. At least one wall of the cooling radiator forms a support for at least one portion of a cooling circuit in which a cooling fluid circulates.

Abstract: A polyvinyl chloride polymer (PVC) composite material is described herein. The PVC composite material includes 40-60 parts by weight of PVC, 40-60 parts by weight of calcium carbonate, 0.2-0.6 parts by weight of composite foaming agent, 3-5 parts by weight of foam regulator, 2-4 parts by weight of toughener, 0.8-1.2 parts by weight of lubricant, and 2-3 parts by weight of stabilizer. Meanwhile, the present invention provides a foam board made of the PVC composite material and flooring. The resulting PVC products have a high-strength structure and a good foaming property, bring the comfort to feet as the resilient flooring does, have a satisfied sound reduction and can be easily installed as the hard flooring could.

Abstract: An electric drive unit that includes an electric motor having a rotor with a rotor shaft and a heat exchanger that is received in the rotor shaft. The heat exchanger has a plurality of heat exchanger plates, each of which having a hub, a rim member, and disc spring portion that interconnects the hub and the rib member. Each disk spring portion defines a plurality of coolant apertures. The heat exchanger plates are press-fit to the rotor shaft such that each disc spring portion is deflected from a pre-installation state, and each rim member is engaged to an interior surface of the rotor shaft while being spaced apart from adjacent rim members along a rotational axis of the rotor. A first coolant passage is disposed through the hubs of the plates. The coolant apertures in the heat exchanger plates cooperate to form a plurality of second coolant passages.

Abstract: A system comprises a stator core defining a plurality of winding slots between circumferentially spaced apart teeth. A respective cooling channel is defined within each of the circumferentially spaced apart teeth for circulation of coolant fluid through the stator core. The stator core is a laminated structure, where the teeth, winding slots, and cooling channels are part of a common laminated structure with the stator core.

Abstract: A rotor (1) for an electric machine (25) which comprises a rotor support (2). The rotor support has cylindrical inner and outer shells (3, 4). A magnetic flux-carrying rotor component has first and second end faces (6, 7) and carries the cylindrical outer shell (4). A rotationally shaft section (8) is arranged in an inside space (9) of the rotor support and mounted coaxially with the rotor support. At least in the area of the first end face (6) the outer shell has first teeth which face toward the magnetic flux-carrying rotor component and a first tooth base between respective pairs of first teeth, and at least in the area of the second end face (7) the outer shell (4) has second teeth which face toward the magnetic flux-carrying rotor component and a second tooth base between respective pairs of second teeth. The invention also relates to an electric machine.

Abstract: A first bracket in an electric motor includes an inflow path through which outside air flows inside, and an outflow path through which the air having flowed in flows outside. A stator core included in the electric motor includes a first ventilation path that is coupled with the inflow path and a second ventilation path that is coupled with the outflow path. A second bracket includes a third ventilation path that forms a flow path from the first ventilation path to the second ventilation path positioned symmetrically to the first ventilation path with respect to a plane containing a rotation axis. The air having flowed into the inside of the electric motor through the inflow path passes, in order, through the first ventilation path, the third ventilation path, and the second ventilation path, and flows out to the outside of the electric motor through the outflow path.

Abstract: A frame included in an electric motor has an inflow hole that allows outside air to flow in an interior of the electric motor and an outflow hole that allows the outside air having flowed in to flow out of the electric motor. The electric motor includes a first partition member forming a first ventilation path between the first partition member and the frame, and a second partition member forming a second ventilation path between the second partition member and the frame. In addition, the stator has a third ventilation path penetrating through the stator from one end to another end of the stator in a direction of a rotational axis and configured to communicate with the first ventilation path and the second ventilation path.

Abstract: An electrical machine assembly includes a stator. The stator includes a core, windings assembled into the core, and a back iron heat exchanger mounted to the core. A first end plate is mounted at a first end of the core and back iron heat exchanger. A second end plate is mounted at a second end of the core and back iron heat exchanger opposite the first end plate. A coolant circuit passes from a coolant inlet in the back iron heat exchanger, through the back iron heat exchanger, into the first end plate, out of the first end plate, through the core, into the second end plate, and out of the second end plate.

Abstract: The present invention relates to a motor comprising: a motor housing; a stator which is provided in the motor housing and has a coil; a rotor installed in the stator to be rotatable about a rotary shaft; and a spray hole which is formed in the circumferential surface of the rotor by passing through the circumferential surface in a radial direction and which sprays a cooling fluid in the motor housing onto the coil according to the rotation of the rotor. Therefore, cooling by oil convection can be accelerated while minimizing resistance due to the oil.

Abstract: An electric machine for a work vehicle including a housing, a stator assembly positioned inside the housing, and a rotor assembly rotatably connected to the housing via a bearing. The rotor assembly is positioned to form an air gap between the stator assembly and the rotor assembly. A front air dam is positioned at a first end of the housing and adjacent to the air gap. The front air dam includes an external barrier, an internal barrier, an opening in the internal barrier, and a passageway in the internal barrier. A fan is attached to the rotor assembly and positioned within the housing. The fan generates a first air flow towards the air gap and a second air flow through the passageway.

Abstract: An electric motor comprises a rotor and a stator having a yoke. The yoke includes a plurality of teeth mounted to the yoke and being aligned substantially parallel to an axis of rotation of the motor, each tooth including a first radial end adjacent to the yoke and a second radial end extending from the yoke, a plurality of field coils, each field coil being wrapped around a tooth, and a coolant circulation path including a first coolant channel defined between adjacent field coils and a second coolant channel defined between adjacent field coils and between the first radial ends of adjacent teeth. A third coolant channel may be defined between adjacent field coils and between the second radial ends of adjacent teeth.

Abstract: An electric machine, characterized by two partial machines, each of which has a housing with a bottom-side end wall, in which in each case a stator and a rotor having a hollow rotor arm is accommodated, the two housings being arranged adjacent to one another with their bottom side end walls, with a common distribution device being provided in a cavity between the two housings for distributing a coolant that is used to cool the rotors and which is coupled with at least one housing-side inlet via which the coolant is supplied, and at least one housing-side outlet via which the coolant is discharged, and which is formed to distribute the coolant supplied into both hollow rotor arms and to guide the coolant flowing back from it to the at least one outlet.