Abstract: A rotating electrical machine includes: a stator that includes a stator core and a stator coil; a rotor that rotates with respect to the stator; a refrigerant supply port through which a cooling medium is supplied to a coil end protruding from the stator core; and a guide member, disposed along at least a part of the coil end, for causing the cooling medium supplied through the refrigerant supply port to flow along the coil end.

Abstract: An electrical device comprising a housing having cooling fins located in a central portion along an exterior surface of the housing and a laminated magnetic stack disposed within the housing and interfacing with an interior surface of the housing at the central portion. The cooling fins are configured alternatively higher and smaller on an inlet manifold and in opposition on an outlet manifold.

Abstract: A fan impeller structure includes an annular body. The annular body has a top section and a receiving space. At least one first bending section is formed between the top section and the annular body. At least one recess is formed at the first bending section. At least one flow guide hole is formed between the first bending section and the recess in communication with the receiving space. In operation, the airflow conducted into the receiving space is increased. Moreover, no matter whether the fan impeller structure is clockwise rotated or counterclockwise rotated, the airflow can be conducted into the receiving space through the flow guide hole. Accordingly, the heat dissipation effect will not be affected by the rotational direction of the fan impeller structure.

Abstract: A cooling device mounted in the interior of a frame of a rotating electric machine is configured in such a manner that at least one of the end-face portions between a first end-face portion through which a cooling fluid flows into the cooling device and a second end-face portion from which the cooling fluid flows out thereof is placed tilting with respect to a minimum-width's direction of a frame's internal flow-path in vicinity to the cooling device, or with respect to at least one of an inflow direction and outflow direction of the cooling fluid.

Abstract: An inverter includes a plurality of switching elements that convert between DC and AC power. A base plate includes a surface on which the switching elements are placed. Heat dissipating fins are provided on the opposite side of the base plate. Power is input and output through AC power terminals to and from a rotary electric machine to drive a vehicle. The terminals are electrically connected to the switching elements. A capacitor smoothes the DC power. The inverter is fixed to a case of the rotary electric machine. A rotating shaft of the rotary electric machine extends in a width direction of the vehicle. The base plate is disposed adjacent to the AC terminals in the width direction. A plurality of AC phase-terminals is sequentially arrayed perpendicular to the rotating shaft. The capacitor is disposed adjacent to the heat dissipating fins on the rear side of the vehicle.

Abstract: A heat sink has two heat radiation blocks. The heat radiation block is formed in a wide column shape. The heat radiation block has connection parts at both ends. The connection parts have respective holes formed to pass through in the axial direction of a motor. One screw is inserted in one connection part and threaded into a motor case. The other screw is inserted in the other connection part and threaded into the motor case together with a cover. A power module forming an inverter circuit of each of two power supply systems is arranged on each heat radiation blocks.

Abstract: In a brush holder accommodating part 26d of a gear housing 26, paired flat surface parts 26c and paired curved parts 26b are alternately disposed so as to be formed into an elliptical shape, one of the paired flat surface parts is formed with first heat sinks 26i, and two brushes 20 and 20 mounted on a brush holder unit 19 accommodated in the brush holder accommodating part 26d are disposed near the first heat sinks 26i.

Abstract: The regulator/brush-holder assembly (1) comprises a support (2) and an electrical circuit (5, 6) comprising a regulating element (5) connected by microwires to a trace circuit (6). The electrical circuit further includes a filtering circuit (10) separate from the regulating element and connected by microwires to the trace circuit. According to one particular embodiment, the filtering circuit comprises an insulating substrate (11) and surface-mounted components (C1, C2, S1, S2, V). A ground plane (19) and/or one or more ground pads may be provided for connection to a ground trace of the trace circuit. The filtration frequencies of the filter circuit extend from 100 kHz to 1 GHz.

Abstract: An electric machine includes a housing, a stator fixedly mounted relative to the housing, and a rotor assembly rotatably mounted relative to the stator. The rotor assembly includes a plurality of rotor laminations forming a rotor body, one or more permanent magnets provided in the rotor body, and a sleeve extending around the one or more permanent magnets. The sleeve provides a thermal interface between the one or more permanent magnets and the rotor body.

Abstract: The invention relates to an electric motor, in particular for a motor vehicle, comprising a housing (9), a shaft (8) having an axle (30), a stator and a rotor, at least one channel (11) for conducting a coolant for cooling the electric motor (5), wherein the geometry of the alignment of at least one section (12) of the at least one channel (11) is designed such that the coolant flows in the direction of the axle (30) of the shaft (8) through the at least one channel (11), having a deviation of less than 40°.

Abstract: A rotary electric machine includes a rotor, a stator having coils wound to surround the rotor, a cylindrical ring member fixedly mounted on the stator by shrinkage fitting, and a frame disposed on the outside of the ring member with a gap created in between. The distance of the gap varies as a result of thermal expansion of the stator and the ring member. An outer surface of the ring member goes into contact with the frame when the stator and the ring member thermally expand, whereby the stator and the ring member are efficiently cooled.

Abstract: In a stator section of an axial flux electric machine with liquid cooling system, a toroidal core having an inside cylindrical surface and an outside cylindrical surface coaxial with each other along a reference axis, is provided along its annular center line with a plurality of electrical conductor coils spaced from each other and each placed around the core and having a first, a second, a third and a fourth face. Each cooling duct section produces a movement of the liquid coolant from a first to a second base surface of the core and is located between faces of two consecutive coils. At least a face of each coil is adjacent to and in contact with at least one cooling duct section.

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

Abstract: A centrifuge includes a rotor configured to receive sample containers; a drive shaft operatively coupled to the rotor; and a motor. The motor includes a housing; a plurality of substantially parallel fins integral with the housing, each fin having a free end spaced from the housing, wherein the free ends of the plurality of fins are disposed in a common cylindrical plane; and a plurality of substantially parallel grooves, each groove disposed between a pair of adjacent fins and having a groove depth defined by a distance between the common cylindrical plane and the housing. Wherein the plurality of grooves includes a first multitude of grooves having a common groove depth and a second multitude of grooves having a groove depth that is not the same as the common groove depth, wherein the first and second multitude of grooves are interleaved.

Abstract: A fan (20) comprises a fan hub (22), fan blades (24) which are mounted on the fan hub (22), and a drive motor having an outer rotor (30), wherein the outer rotor (30) is arranged inside the fan hub (22). The outer rotor (30) is arranged in the fan hub (22) in such a way that the outer rotor (30) is supported in a radially outward direction on the radial outer wall (36) of the fan hub (22), by means of cooling fins (32) which are formed integrally with the fan hub (22).

Abstract: A rotary electric machine according to embodiments includes a tubular motor frame, a tubular motor cover, and a cooling fan. The motor frame includes therein a stator and a rotor. The motor cover houses the motor frame and includes a suction hole for cooling air at its counter-load side and an exhaust hole at its load side. Herein, the exhaust hole turns the exhaust direction of the cooling air to the counter-load side. The cooling fan sucks the cooling air from the suction hole into the motor cover and exhausts the cooling air from the exhaust hole to the outside of the motor cover.

Abstract: An electric motor includes a motor housing (5) which includes cooling ribs (15) on the peripheral side leading away heat arising in the motor. The cooling ribs (15) only extend over a part of the periphery of the motor housing (5), so that cooling ribs (21) of the electronics housing (13) have space in the cooling-rib-free part of the motor housing (5). The cooling ribs (21) of the electronics housing (13) are arranged aligned with the cooling ribs (15) of the motor transversely to a motor axis (14).

Abstract: An electronically commutated DC motor for a liquid pump, comprising a pump housing, a suction connection and a pressure connection, a substantially disk-shaped pump rotor mounted rotatably in the pump housing, the rotor comprising an impeller having a plurality of pump vanes and a permanent magnet, a partition separating a pump space from a dry space, wherein the partition is disposed in an axial gap between the pump rotor and a plurality of axially parallel oriented stator poles of the DC motor, which are each provided with an insulating body and a stator winding, the stator poles adjoin a stator yoke, which is connected to a metallic heat-conducting body, and the stator containing the stator poles, the stator windings, the stator yoke and the heat-conducting body is disposed in a motor housing made of plastic material.

Abstract: The invention relates to a stator (1) of an electrical machine (10), the electrical machine (10) itself, and a manufacturing method. The stator (1) has a meandering cooling channel (18), wherein the meandering cooling channel (18) is embedded in an element (22), wherein the element (22) comprises a material which is influenced thermally so as to form a shape of the element (22), wherein an iron-containing body (3), for guiding a magnetic field of the stator, is embedded in the element (22).

Abstract: A generator motor cooling structure for cooling a generator motor, which includes a housing storing an input/output shaft to which a rotor is attached and a stator disposed at an outer periphery portion of the rotor, by a cooling medium, includes: a protrusion portion that protrudes toward a coil of the stator from an inner surface of the housing of one end side in a direction of a central rotation axis of the input/output shaft to form a passage of the cooling medium between the coil and the protrusion portion, and is disposed around the central rotation axis.

Abstract: An electric machine comprises an outer casing (2), a rotor and a stator (3) having at least one polar expansion (5) and at least one winding (8) having an annular shape and placed around the polar expansion (5). The casing (2) has a plurality of protrusions (13) each of which holds, by supporting, a corresponding portion (12) of a stator winding (8) to enable heat exchange between the winding (8) and the protrusion (13). Each portion (12) of the winding (8) is electrically insulated from the respective protrusion (13).

Abstract: The invention relates to an electric motor/gear mechanism unit including a housing, an iron-free rotor winding rotatably arranged in the interior of the housing, a collector connected to the rotor winding, a rotor shaft extending through the collector, and a gear mechanism which is connected to the rotor shaft and which has an output shaft. The present invention is so conceived that the gear mechanism is produced from a non-magnetic material and arranged in the interior of the rotor winding.

Abstract: An alternator for a vehicle is provided which is equipped with a heat dissipator and a cooling air generator. The heat dissipator is disposed in a rectifier to cool rectifying devices. The cooling air generator generates a flow of cooling air to the heat dissipator. The heat dissipator has a plurality of sub-fins formed thereon. Each of the sub-fins is defined by a combination of a protrusion and a recess. The protrusions are formed on one of opposed major surfaces of the heat dissipator, while the recesses are formed on the other major surface, one in coincidence with each of the protrusions in a thickness-wise direction of the heat dissipator. This permits the heat dissipator to be pressed to form the protrusions and the recesses to make the sub-fins simultaneously, thus allowing a heat-dissipating area to be increased to ensure a desired degree of heat capacity thereof.

Abstract: A ram air turbine system for generating electrical power in an aircraft when the system is exposed to an airstream exterior of the aircraft. The ram air turbine system includes a turbine, a housing defining an interior, a gearbox having a speed-increasing gear train, and a generator.

Abstract: A first inverter ventilation aperture is disposed so as to pass through a portion of a fin base that faces a bearing, a first rotor ventilation aperture is disposed so as to pass through a portion of a bottom surface portion that faces the bearing, and a first cooling airflow ventilation channel is formed in which a cooling airflow flows radially inward through radiating fins, then flows toward a first surface side of a mount portion through the first inverter ventilation aperture, flows axially through an interior portion of a stator core, and then flows out between the bottom surface portion and a base portion through the first rotor ventilation aperture, and subsequently flows radially outward between the bottom surface portion and the base portion due to rotational driving of a centrifugal fan.

Abstract: An alternator includes a housing having an inner surface and an outer surface, a stationary field coil component fixedly mounted to the inner surface of the housing through one or more mechanical fasteners, and a heat sink component mounted to the outer surface of the housing. The heat sink component includes one or more openings that align with corresponding ones of the one or more mechanical fasteners.

Abstract: An electric motor apparatus having an improved cooling system comprising a first compartment housing an electric motor mounted on a rotating shaft, a second compartment housing an electric circuit adapted to connect said electric motor to a power supply source, and a cooling system adapted to dissipate the heat generated by said electric motor apparatus. The cooling system comprises a fan mounted on said rotating shaft in a position adjacent to said second compartment and on the opposite side with respect to said first compartment and at least one finned heat exchanger adapted to dissipate the heat generated by said electric circuit inside said second compartment.

Abstract: An object of the present invention is to provide an electrical rotating machine that prevents heat generated from a stator winding from being transmitted to an inverter circuit. A rotor having a field winding, and a stator having a stator winding arranged so as to surround the rotor are provided. One end of a rear bracket is connected to the stator, and arranged inside the rear bracket is a heat sink assembly including a heat sink having switching elements for controlling the field winding and the stator winding mounted thereto. The heat sink assembly is fixed to protruding portions protruding from an end surface of the rear bracket.

Abstract: A permanent magnet electric machine includes a rotor having a plurality of permanent magnets and a stator in magnetic communication with the rotor and positioned defining a radial air gap between the rotor and the stator. A housing is configured to seal the rotor and the stator from an outside environment. A pumping element is configured to urge a closed loop airflow across the plurality of permanent magnets to remove thermal energy therefrom, and a plurality of cooling channels are located in the housing and are configured to transfer thermal energy from the stator to a flow of fluid coolant through the plurality of cooling channels. A heat exchanger is located in thermal communication with the plurality of cooling channels to transfer thermal energy from the airflow to the fluid coolant.

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

Abstract: In one aspect, an electric machine is provided. The electric machine includes a housing including at least one air intake, an air outlet, and an air passage extending between the at least one air intake and the air outlet. The electric machine also includes a first heat sink positioned at least partially within the air passage, and a second heat sink positioned at least partially within the air passage downstream of the first heat sink.

Abstract: An electric machine includes a housing having inner and outer sheet metal members attached to one another to form a coolant channel therebetween, a plurality of power electronic components mounted to an axial end of the electric machine adjacent the coolant channel, and a cover secured to the axial end for enclosing the electronic components. A method of cooling an electric machine includes forming a coolant channel at an axial end of the machine, between inner and outer sheet metal members, attaching a power electronics component to the outer sheet metal member proximate the coolant channel, thereby cooling the electronics component by conduction with the coolant channel, and securing a cover to the axial end for enclosing the power electronics component.

Abstract: A motor having an axis of rotation is provided. The motor includes a housing, a first shaft coupled to the housing and a second shaft coupled to the first shaft. The motor further includes a stator coupled to the housing and comprising an outer circumferential surface and an inner circumferential surface, wherein the inner circumferential surface defines a stator bore around the axis of rotation. A gearbox is coupled to the first shaft and to the second shaft and positioned within the stator bore. The motor includes a rotor coupled to the first shaft and adjacent the stator.

Abstract: An electric machine includes a pair of substantially aligned sheet metal housing sections each including a substantially “L” shaped portion, at least one cooling channel being formed at an axial end between the two sections, and a plurality of power electronics components engaged with at least one of the housing sections adjacent the axial end cooling channel. An embodiment includes a stator, a pair of housing sections enclosing the stator, power electronics components positioned at an axial end of the electric machine for controlling operation of the electric machine, and a coolant flow path that includes a power electronics cooling channel formed at the axial end between the housing sections. A method includes forming an axial end cooling channel between two sheet metal housing sections, and positioning power electronics components at the axial end along the cooling channel, whereby heat from the electronics components is transferred to the cooling channel.

Abstract: A radial blower air guide includes a first end wall substantially circumscribing an end bracket of an electric motor. The air guide includes a second end wall spaced apart from the first end wall and has an inner periphery that circumscribes a periphery of the motor. The air guide includes an outer wall extending from an edge of the first end wall to an edge of the second end wall. The outer wall is formed from a thin curved plate and partially defines a ring-shaped chamber therebetween. The outer wall has an aperture defined therethrough. The air guide includes a baffle plate coupled to the inner periphery of the second end wall. The baffle plate extends a first width toward the first end wall and partially defines the chamber. The baffle plate is configured to deflect air to control the distribution of the airflow from the chamber.

Abstract: An electric machine includes a stator having an outer circumference. Spaced apart first walls are arranged about the outer circumference and provide generally parallel first channels. A second wall adjoins the first wall and is arranged about the outer circumference providing a second channel in fluid communication with the first channels, thus, providing a tortuous fluid flow path about the circumference. The first and second channels have an inner surface. A structure is provided within at least one of the first and second channels. The structure has an outer surface spaced radially outward from the inner surface and at least partially defines the tortuous flow path between the outer and inner surfaces. The stator includes an end turn. An end cap extends axially and radially outward from the stator and provides an enclosure about the end turn in fluid communication with the exit associated with the flow path.

Abstract: An electric motor includes a frame, a stator disposed in the frame, a rotor disposed in the frame, and a cooling unit configured to perform a cooling operation by supplying a cooling fluid into the frame. Under this configuration, a cooling function may be enhanced, and a high output density and high efficiency may be implemented.

Abstract: A motor assembly, especially for home appliances such as a cleaner, has an electric motor and a cooling system. The motor may be a fractional horsepower universal motor with a stator and a rotor. The cooling system has a cooling pipe thermally coupled to an element of the stator, such as a core of the stator and providing a flow path for a liquid to cool the motor.

Abstract: An electric machine is provided. The electric machine includes a stator, a rotor and a closed cooling channel through which a gaseous cooling medium circulates. The stator includes a stator lamination at least partially encasing several stator windings. The closed cooling channel is disposed in circumferential direction of the stator lamination. The stator lamination is at least partially formed as fins.

Abstract: The invention relates to a motor unit (5) comprising a motor (1), a heat exchanger (2) and an inverter (3) for the motor (1). In order to provide a compact, low-cost motor unit it is proposed that the heat exchanger (2) is embodied for cooling both the motor (1) and the inverter (3).

Abstract: Disclosed is a rotor (1) for an electric rotor motor, consisting of a rotor bell (2) with a peripheral wall (4) and at least one one-sided rotor base (6) to enclose a stator, in particular as a part of a motor housing with a high IP rating, for example IP54 per DIN/IEC-EN 60034-5. The rotor bell (2) features a heat sink (12) with high heat conductivity that extends through the rotor base (6) in such a way that the motor heat arising on the inside can be removed via the heat sink (12) through the rotor base (6) to the outside into the environment. Further, the invention relates to an electric rotor motor, in particular with an encapsulated motor housing with a high IP-protection system, for example IP54 per DIN/IEC-EN 60034-5, consisting of a stator and a rotor (1) enclosing the stator in an embodiment of the above-described type.

Abstract: Some embodiments of the invention provide an electric machine module include a housing. In some embodiments, the housing can include at least one end cap coupled to a central member. The housing can include a first axial end and a second axial end. The central member can include at least a portion of a coolant pipe, which can include end portions extending at least partially through the end cap. In some embodiments, an electric machine, which can include a stator assembly, can be positioned within the housing so that the coolant pipe is substantially coiled around at least a portion of an outer perimeter of the stator assembly.

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: 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 coolant jacket that contains a first coolant. A coolant sump can be in fluid communication with the machine cavity and can contain a second coolant that is different than the first coolant. The coolant sump can be in thermal communication with the coolant jacket. An electric machine can be positioned within the machine cavity. The electric machine can include a stator assembly, a rotor assembly, and a shaft. The module can also include at least one coolant channel, at least one shaft channel, and at least one rotor channel.

Abstract: Two power modules, in which switching elements for switching over currents supplied to coils of a motor are resin-molded, are provided to face each other sandwiching a plane including a rotation axis of a shaft. A first smoothing capacitor, second smoothing capacitors and a choke coil are located between the power modules. By consolidating large-sized electronic parts between the power modules, a control unit can be reduced in size and impedance of electric conductor connecting the electronic parts and the power modules can be reduced.

Abstract: A housing for coupling to a motor having an axis of rotation is provided. The housing includes an end cap having an outer surface and an inner surface. The housing also includes a plurality of first heat fins coupled to the outer surface. Each first heat fin of the plurality of first heat fins includes a first portion extending radially from the axis of rotation. In addition, the housing includes a second portion coupled to first portion and extending parallel to the axis of rotation. The housing further includes a second heat fin coupled to the second portion.

Abstract: An electric motor disposed in an electric vehicle includes a stator, a first rotor located at an outer side of the stator, and a second rotor located at an inner side of the stator, wherein each of the first rotor and the second rotor includes a plurality of first permanent magnets and a plurality of second permanent magnets, made of different materials from each other, whereby a material cost can be reduced and an output can be enhanced.

Abstract: In a totally-enclosed horizontal rotating electric machine in which a rotor horizontally arranged and a stator arranged at an outer circumference side of the rotor are hermetically sealed in a main frame, and the rotor and the stator are cooled by circulating refrigerant gas, which is encapsulated in the main frame, through a refrigerant passageway, and water-cooled heat exchangers for cooling the refrigerant gas are provided on the way of the refrigerant passageway, the heat exchangers are respectively arranged in a longitudinal direction at each of positions neighboring both left-right end portions at a front side and both left-right end portions at a rear side of the main frame, and a feed-water inlet and a drain outlet of cooling water are provided at an upper side of the heat exchangers.

Abstract: A cooling system of an electric machine includes a hub, a rotor core, and a thermal interfacial material interposed between respective complementary mating surfaces of the hub and the rotor core for substantially eliminating air gaps therebetween. A method of cooling an electric machine having a rotor core and a hub includes placing a thermal interfacial material onto a heat transfer interface between the rotor core and the hub, whereby the thermal interfacial material reduces contact resistance at the heat transfer interface. A method includes providing a rotor core having a radially inner surface, coating at least one of a radially outer surface of a hub and the radially inner surface of the rotor core with a thermal interfacial material, and inserting the hub into the rotor core, whereby the thermal interfacial material is interposed between the inner surface of the rotor core and the outer surface of the hub.

Abstract: A stator system for a generator is provided. The stator system includes a housing element, a conductor, a cooling box and a cooling arrangement. The conductor forms at least one winding of the stator system. The winding includes two central sections and an end section. The end section connects the two central sections, wherein each of the two central sections are mounted at a surface of the housing element. The end section projects from the housing element. The cooling box is mounted to the housing element in such a way that the cooling box encloses the end section, so that the end section runs inside an interior space of the cooling box. The cooling arrangement is located in and/or at the cooling box, wherein the cooling arrangement is adapted for cooling the end section.