Abstract: Disclosed is a liquid filled electric motor to eliminate over-heating of direct drive motors and for preventing leakage of liquid from inside to the outside environment. The liquid filled electric motor is attached to the frame of a vehicle. The liquid filled electric motor includes a stationary axle attached to the frame of the vehicle, an angled hole configured on the stationary axle, a rotor for rotating around the stationary axle; a stator attached directly to the stationary axle, and one or more cables to energize the stator. The cables exit at an angle through the angled hole in the stationary axle to prevent capillary action for preventing leakage from inside to the outside environment. The level of the liquid is less than the full volume of the empty space in the electric motor.

Abstract: A cooling apparatus of a drive motor is disclosed. An exemplary embodiment of the cooling apparatus may include a flow passage through which coolant flows. The flow passage is formed in the motor housing. A coolant inflow portion and a coolant outflow portion are connected with the flow passage. At least one penetration hole is formed in the motor housing and connected with the flow passage. A seal member is engaged with the penetration hole to vary a cross-sectional area of the flow passage.

Abstract: A motor frame is disclosed. According to an exemplary embodiment in the present disclosure, a motor frame includes a main frame including a component of a motor provided therein; and a front cover and a rear cover covering an open front surface and an open rear surface of the main frame, respectively, and having cores into which the component of the motor is inserted, respectively, in which a region between the main frame and the cores is asymmetrical in a vertical direction.

Abstract: A pump for fluids includes a pump housing, a power source enclosed within the housing, a drive shaft connected to the power source, at least one pump inlet arranged in the pump housing, a pump outlet arranged in the pump housing, a first impeller arranged within a first impeller chamber and rotated by the drive shaft, and a second impeller arranged within a second impeller chamber and rotated by the drive shaft. The pump is changeable between a first configuration in which the first and second impeller are arranged in parallel to provide a high pumping capacity, and a second configuration in which the first and second impeller are arranged in series to provide a pump with less pumping capacity.

Abstract: A vehicle drive device that includes a body case that accommodates at least the rotary electric machine; an inverter case joined to the body case; and an inverter case cover joined to the inverter case; wherein an inverter housing that accommodates the inverter device is formed in a space enclosed by at least the inverter case; wherein a connection terminal electrically connecting the rotary electric machine and the inverter device is disposed in the inverter housing; wherein the case outer wall is formed by a first outer wall, a second outer wall, and the inverter case cover, the first outer wall being an outer wall of the body case, the second outer wall being an outer wall of the inverter case; and wherein a supply port and a discharge port for liquid refrigerant for cooling the inverter device are formed on the second outer wall.

Abstract: A sealed system for an appliance includes a compressor having a shell and lubrication oil disposed with the shell. A condenser in fluid communication with the compressor such that compressed refrigerant from the compressor flows to the condenser during operation of the compressor. The sealed system also includes a heat exchanger for cooling the lubrication oil during operation of the compressor.

Abstract: An electronic package adapted for connection to a rear frame member of an electric machine. The electronic package includes a support structure having opposite first and second axial ends spaced along a package central axis. A plurality of power electronics devices connected to the support structure and electronic control circuitry is carried by the support structure. The electronic control circuitry is substantially surrounded by and operatively connected to the power electronics devices. The control circuitry includes circuit board material having opposing substantially parallel sides, wherein the control circuitry comprises first and second control circuit portions respectively disposed on separate first and second circuit board material portions wherein the first and second circuit board material portions substantially coextend with distinct first and second imaginary planes, respectively. An electric machine employing such an electronic package is also disclosed.

Abstract: Disclosed herein are devices, methods, and systems for heat exchange, comprising one or more multi-disk rotors, one or more finned thermal elements, and a cover, which, even without an external fan, are combined in one apparatus to form a directed movement of fluid and heat exchange. Additional embodiments comprise an additional circulation chamber, integrated with/within said apparatus and/or external fans and/or at least one baffle in a circulation chamber for further directing and intensifying a changing of temperature of fluid passing through the apparatus. A highly efficient heat exchange is achieved by a high temperature gradient near the heat transferring surface and by a high-volume pumping capability of the multi-disk fan. The devices, methods, and systems are particularly applicable in fields that require compactness and low noise levels during operation, such as air conditioning and CPU cooling.

Abstract: Disclosed is an improved life large electric generator comprising a rotor arranged along a centerline of the generator; a core arranged coaxially and surrounding the rotor; a plurality of stator windings arranged within the core; a stator frame arranged to fixedly support the core and rotationally support the rotor; a gas cooling system that circulates a cooling gas within the generator; a liquid cooling system that circulates a cooling liquid to cool the stator windings wherein the cooling ability of the liquid cooling system is a function of a required generator parameter; and a pressure boundary member that surrounds a plurality of the rotor and an entirety of the core and stator windings, the frame configured to operatively contain an internal pressure of two (2) bar relative to atmospheric pressure.

Abstract: A cryocooler assembly for cooling a field winding of an electrical machine having an axis of rotation is provided. The assembly includes a cryocooler and a reservoir coupled in flow communication to the cryocooler and configured to contain a cooling agent. A flow assembly is coupled in flow communication to the reservoir. The flow assembly includes a first flow loop coupled in flow communication to the reservoir; a second flow loop coupled in flow communication to the reservoir; and a plurality of flow members coupled in flow communication to the first flow loop and the second flow loop and coupled to the field winding. Each flow member is configured to thermosiphon the cooling agent in a first state from the reservoir and in a second state to the reservoir.

Abstract: A cooling medium supply/discharge device includes a cylindrical rotary casing which is rotatable with a rotary shaft of the rotor; a cylindrical stationary casing fixed such that the stationary casing extends inward relative to the rotary casing and coaxially with the rotary casing, the stationary and rotary casings being relatively rotatable; a first stationary cylindrical body which is inserted into the stationary casing such that the first stationary cylindrical body is not rotatable; a first rotary cylindrical body which is inserted into the first stationary cylindrical body with a gap such that the first rotary cylindrical body is rotatable together with the rotary shaft; a second stationary cylindrical body which is inserted into the first stationary cylindrical body such that the second stationary cylindrical body is not rotatable; and a second rotary cylindrical body which is inserted into the first rotary cylindrical body and rotatable together with the rotary shaft.

Abstract: A field control device for a high-voltage system includes a shielding element for field control, which can be connected to an electrical conductor of the high-voltage system in an electrically conductive manner and, when connected to the conductor, at least partly delimits a weak-electric-field spatial region. A cooling body, which can be connected to the electrical conductor in a thermally conductive manner and which is disposed within the weak-field spatial region, has an outer surface area which is greater than an outer surface area of the shielding element. A high-voltage system having the field control device is also provided.

Abstract: A centrifugal compressor includes a driving shaft (2) which is rotationally driven, a driving gear (11) which is connected to the driving shaft (2), a driven gear (12, 13) to which rotation of the driving gear (11) is transmitted, a driven shaft (3) which extends toward both end sides in a center axis direction of the driven gear (12, 13), a first compression portion (41) which is provided on a first end portion side in the center axis direction of the driven shaft (3), a second compression portion (42) which is provided on a second end portion side in the center axis direction of the driven shaft (3), and a pressure adjustment portion (7) which uniformly adjusts a pressure of a space of a discharge side of a fluid in the first compression portion (41) and a pressure of a space of a discharge side of a fluid in the second compression portion (42).

Abstract: An electrical machine includes housing surrounding a stator laminated core and a stator winding. Stator core support rings are arranged between the housing and the stator laminated core and radially surround the stator laminated core, with a cavity being formed between the housing, the stator laminated core and the stator core support rings. The stator laminated core has a cooling channel which is fluidically coupled with the cavity via a channel entry arranged centrally in the middle of the stator laminated core, thereby creating in conjunction with the channel entry a T-shaped form of the cooling channel so that a stream of coolant is not heated over an entire length of the stator laminated core, but only over a shorter stretch as a result of the T-shaped form.

Abstract: A pumping system configured to be deployed in a wellbore includes a motor that is filled with a motor lubricant oil, a production pump driven by the motor, a heat exchanger and an internal oil circulation system contained within the pumping system. The internal oil circulation system circulates the motor lubricant oil between the motor and the heat exchanger.

Abstract: A submersible thruster, and methods of optimizing and using same, including selecting a motor with an efficiency of greater than 75 percent when operated at 250 rpm immersed in a pressure-resistant fluid, the motor having a drive shaft with a rotor and a stator matched to the rotor, the rotor and the stator being immersed in the pressure-resistant fluid and being separated by a gap less than or equal to 1 mm. The motor is disposed in a housing to isolate the motor components from a liquid environment. A rear portion of the drive shaft extends through a low-friction shaft seal beyond the housing to drive at least one propeller within the liquid environment. Movement of the drive shaft is constrained to a radial and axial play each of less than 0.75 mm. The method further includes operating the motor at less than 50 percent of peak power, wherein said thruster operates at greater than 30 percent end-to-end thrust efficiency within the liquid environment.

Abstract: Provided is a deionized-water cooling system having a main circuit for cooling electrical equipment. The system includes a deionizer circuit including (i) a deionizer for producing deionized water and (ii) a throttle and a main pumping system configured for circulating (i) the deionized water within the main circuit at a first flow rate and (ii) the water flow within the deionizer at a second flow rate. The circulating occurring when the electrical equipment is operating. The electrical equipment is configured for receiving power from a primary power source. Also included is a secondary pumping system configured for (i) receiving power from a secondary power source, (ii) circulating the deionized water within the main circuit, and (iii) circulating the water flow within the deionizer at the second flow rate via the throttle when the electrical equipment is inoperable.

Abstract: A rotor for a reluctance motor having a laminate stack of layers is disclosed. Each layer has at least one magnetically-conductive rotor lamination, and in each layer a plurality of flux-conducting sections are formed by the at least one rotor lamination, which flux-conducting sections are separated from one another by a nonmagnetic region. The invention addresses the problem of enabling a high torque and a high speed. For this purpose, an insert disk is arranged between at least two of the layers, connected in each case to at least two flux-conducting sections of one of the layers or both of the layers between which said insert disk is arranged and, as a result, connects said flux-conducting sections to one another beyond the nonmagnetic region located there between.

Abstract: Cooling systems and methods for controlling the temperature of motors of gas compression systems of chillers are disclosed. Certain systems utilize a centrifugal, two stage compressor equipped with a motor between the stages. The cooling system provides a low velocity refrigerant spray on at least one or both ends of the motor without requiring additional pumping energy from the motor to deliver the refrigerant spray.

Abstract: Embodiments of the invention provide an electric machine module. The module can include a housing that can define a machine cavity. The housing can include a sleeve member that can include a first axial sleeve member comprising a first flange, a second flange, and first recess at least partially defined between the first flange and the second flange. The sleeve member can also include a second axial sleeve member comprising a third flange, a fourth flange, and a second recess at least partially defined between the first flange and the second flange. The first axial sleeve member can be coupled to the second axial sleeve member to form the sleeve member and so that the first recess and the second recess form a coolant jacket. An electric machine can be positioned within the machine cavity so that it is substantially circumscribed by a portion of the coolant jacket.

Abstract: Disclosed is a variable performance large electric generator, comprising, a rotor arranged along a centerline of the generator; a core arranged coaxially and surrounding the rotor; a plurality of stator windings arranged within the core; a stator frame arranged to fixedly support the core and rotationally support the rotor; a gas cooling system that circulates a cooling gas within the generator; a liquid cooling system that circulates a cooling liquid to cool the stator windings wherein the cooling ability of the liquid cooling system is a function of a required generator parameter; a pressurizing system that operatively pressurizes the cooling gas to a maximum pressure of two (2) bar relative to atmospheric pressure, wherein the pressurizing system continuously determines the cooling gas pressure based upon a required generator parameter; and a control system that controls the cooling ability of the liquid cooling system in conjunction with the cooling gas pressure.

Abstract: A centrifugal compressor for a refrigeration system is disclosed. The centrifugal compressor includes an electric motor, which includes a rotor and a stator. The compressor further includes a housing enclosing the electric motor, a stator cooling passage provided within the housing, and a rotor cooling passageway provided within the housing. The rotor cooling passageway is independent of the stator cooling passageway.

Abstract: A turbo machine system having an intake structure for air inflow and a cooling structure for a driving motor, and including a driving unit having a rotor and a stator, a compression unit having an impeller that rotates in conjunction with the rotor, guide piping that guides driving unit cooling fluid that flows into the driving unit and is discharged to the outside through the inside of the driving unit and into the compression unit, and external fluid inflow piping that is provided on one side of the guide piping and is provided to communicate with the guide piping, the external fluid inflow piping guiding the external fluid by the differential pressure between the end of the external fluid inflow piping and the inside of the guide piping so as to flow into the guide piping.

Abstract: An electric machine for an electrified vehicle is provided. The electric machine may include a stator, a ring plate, an encasement, and a fastener. The stator defines a cavity, a stator recess about a portion of the cavity, and a stator aperture. The stator may include windings disposed within and partially protruding out of the cavity. The ring plate may be sized for disposal within the stator recess, and may define a tab and a plate aperture for alignment with the stator aperture. The encasement may define a key sized for engagement with the tab to secure the encasement to the ring plate, and a closed coolant channel. The fastener may be sized for insertion within the apertures to secure the plate to the stator. The stator, ring plate, and encasement may be arranged with one another such that the partially protruding windings are disposed within the closed coolant channel.

Abstract: An electric machine (1) and to a method for producing the machine (1), including a housing (2) and a stator (3) accommodated therein, as well as at least one rotor (4) arranged radially inside the stator (3), a plastic body (7) that at least radially surrounds the outside of a soft-magnetic core (5) of the stator (3), and a cooling device (10) located between the stator (3) and the housing (2) is provided. In order to improve the cooling device (10), at least one recess (11) that conveys a cooling medium is created between the housing (2) and the stator (3) at least partially in the outer circumferential surface of the plastic body (7).

Abstract: The present disclosure relates to a chamber for housing strands of a stator bar for electric machines. The problem to provide a reliable chamber for a stator bar of an electric machine is solved with a stator bar chamber engaging a stator bar in an electric machine. The chamber includes a number of hollow conductors in a first straight part of the chamber, a number of hollow conductors in a second tapered part, and a number of hollow conductors and adjacent solid conductors in a third straight part. The first part of the chamber is closed with a ring mounted at the edge of the first part and a nipple adapted to the ring.

Abstract: A separated coolant circulation structure for a water-cooled power generator includes a cooling circulation channel for a stator bar to cool heat of a stator bar winding, and a cooling circulation channel for a connector ring to heat of a connector ring, wherein the cooling circulation channel for the stator bar and the cooling circulation channel for the connector ring form separate coolant supply paths to improve cooling efficiency and reduce a pump load.

Abstract: The invention relates to a method for liquid cooling of an electric motor of inner rotor type having a rotor of hub type and a stator provided with windings. The method includes supplying a cooling liquid for cooling to at least one end of the hub of the rotor, feeding supplied cooling liquid at least radially in the hub by means of the rotation of the hub, and by means of the rotation of the rotor throwing thus fed cooling liquid towards the stator. The invention also relates to a device and a platform to practice the method.

Abstract: The invention relates to a device for sealing a pump of a nuclear power station. Said includes: a mechanical packing and a fluid header. The header includes: a first plurality of surfaces that cooperate with said mechanical packing; a second plurality of surfaces that are designed to cooperate with a pump housing; and a plurality of ducts. The plurality of ducts form, in an operating state, a first fluid circuit that constitutes a thermal barrier between the first plurality of surfaces and the second plurality of surfaces, and a second fluid circuit that supplies fluid to said mechanical packing in order to cool it.

Abstract: A containing casing for a stator of an electric machine defines, around said axis, a compartment to house the stator. A first radially inner part and a second radially outer part are coupled to one another and define together at least one duct surrounding the axis for the passage of a cooling fluid. Said duct comprises, in turn, a plurality of first sections and a plurality of second sections, which are distributed around the axis alternated with one another. The first sections are arranged around the axis with an arrangement that supports the motion of the fluid around the axis. The second sections are transverse to the first sections and at least partially obtained inside respective protuberances of the first radially inner part, which project towards the inside of the compartment. A space for the insertion of radially projecting portions of electric windings of the stator is defined between two consecutive protuberances around the axis.

Abstract: A power connector for an electric motor is disclosed. The power connector includes a flange, a conductor rod, and an insulation sleeve. The conductor rod includes a first portion extending in a first direction from the flange and a second portion extending from the flange in a second direction, opposite the first direction. The second portion includes a lead wire connection end distal to the flange. The insulation sleeve covers the second portion from the flange to the lead wire connection end. The insulation sleeve includes a sleeve outer surface, and a sealing rib extending outward from the sleeve outer surface.

Abstract: A control system for a switched reluctance (SR) motor includes a Direct Current (DC) power source, and an inverter. The control system includes a user interface configured to enable an operator to specify a desired torque output. The control system further includes a controller which converts a DC current from the Alternating Current (AC) supplied to the SR motor by the inverter. The controller estimates an actual power output generated by the SR motor based on a DC voltage supplied by the DC power source to the inverter, and the converted DC current. The controller estimates an actual torque output based on the actual power output and a rotational speed of the SR motor. The controller compares the actual torque output and a desired torque output to calculate a torque error. The controller adjusts a torque output limit and the rotational speed of the SR motor.

Abstract: A cooling jacket for cooling using a fluid includes an inner part, an outer jacket that extends in an axial direction and surrounds the inner part in a cross-sectional plane perpendicular to the axial direction, and a duct for holding the fluid. A first boundary of the duct an outer surface of the inner part, while a second boundary of the duct includes an inner surface of the outer jacket. The inner part is arranged inside the outer jacket, and a material property of the outer jacket is different from the material property of the inner part.

Abstract: A cooling-member-integrated motor includes a housing and a stator including a stator core and a stator coil wound around the stator core. A cooling member surrounds an outer circumferential surface of the stator, and a molding member is disposed in the housing. The stator and the cooling member are integrally embedded in the molding member.

Abstract: A housing for an electrical machine includes an endshield and a cover. The electrical machine has a rotation axis, a rotor assembly including a rotor, and a controller assembly. The rotor assembly includes a bearing assembly. The endshield includes an annular center section including a bore sized to couple to the bearing assembly. The cover is coupled to the endshield. The cover includes a generally axially-extending flange wall formed about a perimeter of the cover, a volute-shaped inner chamber configured to at least partially enclose the rotor coupled to the rotor assembly of the electrical machine, and a cooling channel positioned radially outward from the inner chamber. The cooling channel is configured to at least partially enclose the controller assembly of the electrical machine.

Abstract: A rotary electrical machine cooling apparatus includes: a rotary electrical machine including a stator having an annular resin portion which covers a coil end, and a rotor; and a cooling portion that injects a coolant from an upper side to the annular resin portion. The annular resin portion includes: an annular main body portion, and a plurality of island portions that protrude in the axial direction from a plurality of positions in a circumferential direction of an axially outer end face of the annular main body portion. The plurality of island portions include a plurality of first island portions having first maximum circumferential lengths and a second island portion that has a second maximum circumferential length L2 and the coolant impinges on the outer circumferential face to flow in a circumferential direction. Thus, the coolability of the coil can be improved.

Abstract: Provided is a rotating electric machine capable of suppressing an increase in temperature of an output terminal (26) to suppress a temperature rise of an internal device, and preventing lowering of a force for fastening the output terminal and a terminal portion of an external device. The rotating electric machine for a vehicle includes a rectifier provided inside a casing, and a terminal device projecting outward through an opening portion of the casing to connect the internal device and the external device. The terminal device includes the output terminal (26) projecting outward through the opening portion to be connected to the terminal portion of the external device by fastening, and a resin body (37) having electrical insulating property and high thermal conductivity, for integrally covering the output terminal (26) except at least for a portion to be connected to a harness-side terminal (35).

Abstract: A cooling medium accumulation part is integrally formed with a spindle housing and an attaching section between the spindle housing and the attaching section so that at least a width of the cooling medium accumulation part in a direction perpendicular to the spindle is wider than a width of the motor accommodation section in a virtual projection plane obtained by projecting the cooling medium accumulation part in a direction from the spindle housing to the attaching section. A straight oil supply through-holes communicating the cooling medium accumulation part and the cooling passages are formed in a side wall part of the spindle housing.

Abstract: A rotor assembly for an electric machine includes a core having at least one post and a cap wherein electrical windings are wound about the rotor assembly to define a pole. The rotation of the rotor and rotor pole relative to a stator generates a current supplied from the electric machine to a power consuming device.

Abstract: A symmetrical cooling system for an electric rotor machine that includes a passageway that is positioned between portions of the stator, and which provides a pathway for a cooling medium. Stator ducts positioned within the stator, or portions thereof, are in fluid communication with the passageway. Cooling medium may flow through the stator ducts from the passageway to ends of the stator so that the cooling medium only travels along a portion of the overall axial length of the stator. The symmetrical cooling system also includes an air gap that is positioned between the stator and the rotor, and which receives cooling medium from the passageway at a midsection of the air gap. Cooling medium received at the midsection of the air gap may then flow towards either first or second ends of the stator.

Abstract: An axle assembly for an electric or hybrid vehicle includes electrically powered drive motors for respectively driving vehicle wheels. The axle assembly preferably includes a dual motor arrangement, wherein two electric motors are arranged end-to-end. Each motor includes an inverter that is directly connected to its respective motor, and includes a gearbox assembly coupled between an output of the motor and a corresponding constant-velocity (CV) joint operatively connected to a wheel. The inboard ends of the motors are secured to opposite faces of a cooling manifold wherein the cooling manifold maintains the motors in axial alignment. The cooling manifold plate is positioned between an inboard end of each of the motor housings, and the cooling manifold plate axially aligns the first and second motors.

Abstract: Disclosed is a motor, the motor according to an exemplary embodiment of the present disclosure including a motor unit including a stator, a rotor and a rotation shaft receiving a rotary power from the rotor, a first housing accommodating the motor unit and including a hitching rim protruded thereinto at a distal end of an upper surface, a second housing interposed between the first housing and the motor unit and including a first flange unit protruded to an upper outer surface for a space distanced from the first housing and a second flange protruded to a bottom outer surface, a first cover coupled to an upper surface of the first housing and the second housing, and a second cover coupled to a bottom surface of the first housing and the second housing.

Abstract: Embodiments of an end winding support and heat sink for a pole of a generator are provided. An aspect includes a flat plate portion, the flat plate portion comprising an internal cooling liquid channel that routes coolant through the flat plate portion. Another aspect includes a plurality of fins extending out from the flat plate portion, wherein wires of the windings of the generator are supported by the plurality of fins.

Abstract: A rotating machine has a shaft rotatable about an axis, a rotor rotatable with the shaft, and a rotor end winding at an axial end of the rotor. A stator is spaced from the rotor and forms a gap therebetween. The stator comprises a stator winding. A fluid system directs fluid through to the stator. A baffle to diverts fluid away from the gap and toward the stator.

Abstract: The invention relates to an electrical machine (1, 51), in particular an asynchronous machine, comprising a stator (2), a rotor (4) which is rotatably mounted about a rotation axis (3) and magnetically interacts with the stator (2) during operation of the electrical machine (1, 51), a shaft (5) on which the rotor (4) is fixed and which has an axial hole (6), and an inflow element (7, 47) which extends into the axial hole (6) such that a coolant (15), in particular a cooling liquid (15), can flow into the axial hole (6) from the inflow element (7, 47). The invention also relates to a cooling system (50) comprising an electrical machine (1, 51) and a coolant circuit (55) for transporting the coolant (15), in particular the cooling liquid (15), through the axial hole (6), and to a vehicle (61) comprising a cooling system (50).

Abstract: A subsea unit includes a housing containing a dielectric liquid, a first heat generating component and a second heat generating component. The first heat generating component is arranged in thermal connection with the housing and the second heat generating component is arranged at a distance from the housing. A method of cooling heat generating components contained in a housing of a subsea unit is also presented.

Abstract: Performance of an electric motor can be improved if coolant is provided to the coils of the stator. An electric motor is disclosed that has a shaft onto which the rotor is secured. The motor has a stator that is mounted on bearings that are mounted on the shaft. The stator has a plurality of coils. A coolant guide is provided that fills voids between the groups of windings. The coolant guide has a plurality of fingers with the fingers arranged between adjacent pairs of coils. The coolant guide has internal passages to accept pressurized coolant and outlet holes to spray coolant onto the coils. In other embodiments, the fingers guide coolant to reach all coils under the force of gravity.

Abstract: Provided is a rotating electrical machine wherein it is possible to sufficiently cool an electronic device attached to a rotor by means of a liquid refrigerant. A rotor for a rotating electrical machine is provided with a shaft supported in a rotatable manner, a rotor core secured to the shaft, an electronic device disposed so as to rotate along with the shaft and the rotor core, a coil wound around the rotor core and connected to the electronic device, and a cooling structure for sequentially cooling the electronic device and the coil by means of a liquid refrigerant supplied from the shaft.

Abstract: An outboard motor includes an engine, a power generator including a rotor and a stator, a convertor, and an engine cover configured to cover the engine and the power generator. The rotor includes a permanent magnet.

Abstract: A core for an electrical machine has a segmented body with first segments and second segments. The first segments extend from a radially inner portion of the segmented body to a radially outer portion of the segmented body. The second segments are axially stacked in alteration with the first layers along an axis of the segmented body. The first segments have thermal conductivity greater than thermal conductivity of the second segments for transferring heat from the radially outer portion of the segmented body to the radially inner portion of the segmented body.