Abstract: The present invention relates to an apparatus for generating power by a direct current supply brush that rotates with a field pole generator, the apparatus comprising: a field pole generator which has a plurality of iron cores having a coil or wire wound around; a winding wire used for power generation, the winding wire being formed in such a manner as to wind around the field pole generator; a commutator which is disposed at one end of the field pole generator and has a plurality of commutator segments arranged in a circular shape; a rotating body which has a direct current supply brush adhered to the outer surface of the commutator; a motor for rotating the rotating body; a slip ring secured to a shaft of the motor; and a direct current supply unit for supplying direct current power to the slip ring.

Abstract: A dynamoelectric machine includes a rotor having a plurality of adjacent coils; and a spaceblock disposed between adjacent coils so as to define at least a first cavity adjacent the spaceblock and between mutually adjacent coils, the spaceblock including a channel disposed in a coil facing surface of the spaceblock for intercepting and redirecting a circulating coolant flow to the first cavity.

Abstract: An electric machine including a housing having a body including an inner surface that defines an interior, a first end defining an opening exposing the interior, and a second end. A stator is fixedly mounted to the inner surface of the housing. A rotor is supported within the interior. The rotor defines an axis of rotation. An end cover extends across the opening adjacent one of the first end and the second end of the stator. A cooling system is carried by the end cover. The cooling system includes a body having a cooling fluid plenum, a plurality of stator nozzles and a plurality of rotor nozzles. The stator nozzles are configured and disposed to direct multiple jets of a coolant toward the stator and the plurality of rotor nozzles are configured and disposed to guide multiple jets of the coolant toward the rotor.

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

Abstract: MP-T II Machines are alternating current, two, three, or four or more phase machines of the multipolar type, i.e. machines whose torque is produced in a cylindrical current tube through axially oriented current flow in a plurality of turns between pairs of parallel permanent magnet poles attached to cylindrical concentric magnet tubes. Unlike MP-T machines, MP-T II machines use flat permanent magnets and may contain cooling cuffs as needed.

Abstract: An electric motor arrangement for a medical, especially dental, tool handle, which is extremely compact and resistant to sterilizing temperatures due to a plurality of advantageous embodiments. The electric motor arrangement is characterized by the following properties: the use of a light source based on SMD-LED or LED as a semiconductor chip; the shortening of the INTRAmatic coupling to between 20 mm and 25 mm; a hermetically extruded stator comprising integrated media tubes and molded connection sockets; the stator winding is embodied as a coil segment winding instead of an H winding or triangle; and the winding head has openings for media tubes.

Abstract: An electric machine has a housing, a rotor shaft mounted in the housing, a rotor laminate stack arranged on the rotor shaft and having axial cooling channels and radial cooling channels, and a stator laminate stack having radial cooling channels which are open radially inwards and radially outwards and interact with the radial cooling channels of the rotor laminate stack. The housing has a lateral surface to delimit the housing interior in a radial direction and radial dividers arranged between end windings of the stator winding and the axial ribs, when viewed in the radial direction, and are spaced in the radial direction from the lateral surface delimiting the housing interior and forming tangential cooling air channels for the cooling air.

Abstract: This disclosure discloses a motor comprising: a motor main body; and a winding switching unit configured to switch windings of the motor main body; the motor main body including: a motor housing that a first coolant channel is formed inside; and a stator having the windings and fixed to an inner surface of the motor housing, the winding switching unit including: a winding switching housing that a second coolant channel is formed inside and being disposed on an outer surface of the motor housing, and heat-generating components disposed at an outer surface of the winding switching housing and used to switch the windings.

Abstract: A pump assembly includes a pump housing (2) with a fluid entry (6) and a fluid exit (8) for a fluid to be delivered. A stator housing (4) is connected to the pump housing (2). At least one cooling channel (12) is formed in a wall of the stator housing (4) and is connected to cooling channels (22, 24) in the pump housing (2), which are in connection with the fluid entry (6) and the fluid exit (8), so that the fluid flows through the at least one cooling channel on account of the pressure difference between the fluid entry (6) and the fluid exit (8).

Abstract: In one possible embodiment, an aircraft electric motor cooling system is provided having an airflow path through a spinner which includes a first airflow path between an inner rotor and a stator, a second airflow path between an outer rotor the stator and a third airflow path along an outer surface of the outer rotor.

Abstract: A first cooling air passage is formed to let first cooling air generated by a cooling fan in from a radially outside of an inverter apparatus to cool a heat sink and out through exhaust holes provided on an outer peripheral side of a rear bracket by passing an inner periphery of the rear bracket. Also, a second cooling air passage is formed to let second cooling air generated by the cooling fan into a hollow portion of the inverter apparatus from an axially rear of a rotation shaft to cool a brush holder and a magnetic pole position detection sensor and out through the exhaust holes by passing the inner periphery of the rear bracket. Hence, cooling performance for the magnetic pole position detection sensor and the brush holder may be enhanced and an axial dimension may be reduced.

Abstract: A brushless alternator has a housing with a front portion and a rear portion. A stator assembly, rotor assembly, and coil support are positioned within the housing. The coil support has a shank portion of a first outer diameter and a base portion of a second outer diameter greater than first outer diameter. The base portion includes a plurality of air flow openings that extend through a second sidewall. A rectifier and regulator assembly is positioned on the outside of the rear portion of the housing. A front fan circulates air across the stator assembly at the front portion of the housing. A rear fan creates a cooling flow of air through flow openings of the coil support to circulate air across the regulator and rectifier assembly and the stator assembly.

Abstract: An electric machine comprising a stator having a stator winding, a housing accommodating the stator, a rotor, and an air gap having a generally cylindrical configuration. A plurality of circumferentially distributed, radial, first cooling gas ducts are provided in a stator core. Jets of cooling gas are directed to regions of an end winding which are relatively distant from the stator core, in order to achieve impingement cooling thereof. Flows of cooling gas are directed to portions of the end winding which are between the impingement cooled regions of the end winding and the respective front face of the stator core.

Abstract: A cooled fan motor may include a tankhead, an elongate housing attached to the tankhead and, having at least one longitudinally extending groove, a shaft rotatably attached to the housing, a hub attached to the shaft, the hub having at least one opening therethrough and shaped to form a gap with the tankhead, a rotor attached to the hub, and a stator mounted on the housing such that the groove in the housing forms an air passage between the housing and the stator connecting the gap and the opening; whereby air external to the motor is able to enter through the gap, flow along the air passage and exit the motor through the opening in the hub, thereby cooling an interior of the motor.

Abstract: A generator for a wind turbine is provided. The generator has a rotor rotatably mounted relative to a stator and a support member for stationary mounting the stator. The stator has at least one groove arranged on a surface of the stator that is bounded by a surface of the support member so as to form at least one duct for conducting a coolant.

Abstract: An electrical machine, especially permanent magnet machine, is comprised of a stator and a rotor rotatable relative to the stator. The rotor and stator are separated from each other by an air gap. A boundary layer control maintains a desired boundary layer thickness in the air gap. The boundary layer control maintains optimal cooling, which minimizes the electrical machine's overall dimensions while maximizing its power density.

Abstract: A stator core of a motor or generator includes a stacked stator laminations that form a plurality of outwardly extending fins and a plurality of cooling channels between the fins. Each stator lamination includes a gap larger than a cooling channel. Each stator lamination is rotated relative to a previous stator lamination in the stack. The gaps of adjacent stator laminations overlap such to connect a cooling channel to adjacent cooling channels.

Abstract: The present invention relates to an airflow management system, particularly for a lawn mower, especially a robotic lawn mower. We describe a battery-operated robotic lawn mower with an active airflow management system, said active airflow management system comprising: at least one first air vent positioned on an underside of said mower; at least one second air vent; an internal housing surrounding a motor; a fan; and at least one cooling air channel located within said housing and around said motor. An air flow path is defined between the first and the second vents; and said at least one second vent has a lower air flow capacity than an air flow capacity of said at least one cooling air channel, such that in operation, a greater volume of air is drawn through the first vent than the second.

Abstract: In an embodiment, a system includes: a casing for surrounding at least a portion of a rotor, and enclosing a volume of a cooling gas thereabout, the casing including a plurality of static seals; an end housing at each end of the casing, each end housing including a seal system through which the rotor extends, wherein a portion of cooling gas escapes from the casing to at least one seal area; and a source of cooling gas fluidly coupled to the casing by a cooling gas regulator. The system may further include: a scavenging system coupled to each end housing for removing a gas mixture therefrom including a portion of escaping cooling gas; a sensor for determining a purity of the cooling gas in the casing; and a static seal leak detector that generates an alarm indicative of a leak in at least one of the plurality of static seals.

Abstract: A system and method for cooling electric machines using direct winding heat exchangers (DWHX) is disclosed. The system can comprise a plurality of DWHXs disposed in thermal communication with a plurality of copper windings in the stator of an electric machine for cooling the plurality of copper windings. The plurality of DWHXs can also be in fluid communication with one or more fluid manifolds for providing coolant to the plurality of DWHXs. The one or more manifolds can be in fluid communication with one or more heat reservoirs for rejecting the heat absorbed by the plurality of DWHXs. The heat reservoir can be an internal system radiator or an infinite reservoir such as a cooling pond. The method can comprise a design tool for optimizing a DWHX cooling system utilizing the internal system radiator or an infinite reservoir, among other things.

Abstract: A stator-arrangement for a generator is disclosed. The stator arrangement includes a plurality of stator segments. Each of the plurality of stator segments includes at least one stator winding and is adapted to build a ring-shaped stator when assembled. At least one cooling means is provided with each of the plurality of stator segments.

Abstract: An electric rotating machine is provided which includes a stator in which a coil is so wound as to have an coil end and a coolant channel. The coolant channel has defined therein a flow path through which coolant flows and a flow separator disposed in the flow path and a first and a second coolant outlet. The flow separator works to separate a flow of the coolant into at least a first and a second coolant streams. The first coolant outlet communicates with the first coolant stream, while the second coolant outlet communicates with the second coolant stream. The first and second coolant outlets drain the coolant to different portions of the coil end, thereby cooling almost the whole of the coil end even when the electric rotating machine is tilted undesirably.

Abstract: Some embodiments relate to an engine driven generator that includes a first electrical fan and a second electrical fan. The engine driven generator further includes a power source and a circuit connecting the power source to the first electrical fan and the second electrical fan. The circuit is configured to selectively connect the first electrical fan and the second electrical fan in series or in parallel. The circuit may operate the first electrical fan and the second electrical fan at full speed when the first electrical fan and the second electrical fan are electrically connected in parallel. The circuit may operate the first electrical fan and the second electrical fan at less than full speed when the first electrical fan and the second electrical fan are electrically connected in series.

Abstract: The electric machine (1) comprises a stator (2), a rotor (3), a cooling circuit for the stator (2) and/or rotor (3), fans (20) for cooling fluid circulation. The fans (20) are separated from the rotor (3).

Abstract: Flow control apparatus for an electrical machine and comprising an arrangement of shaped chambers and passages for conveying a liquid coolant. The rate of heat transfer from certain portions of the machine to the coolant is determined by the varying velocity of the liquid through the chambers, resulting in a generally uniform cooling of those portions of the machine.

Abstract: A coolant fluid distributing manifold for a drive module in an electric motor drive assembly includes a body and passageways in the body for distributing coolant fluid to components of the drive module. The passageways define a delivery conduit and a return conduit.

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: According to one embodiment, a traction motor includes a stator core, a rotor core, a first bearing, a second bearing, a rotor shaft, a first ventilation passage made at an outer circumference portion of the stator core, a first fan, and a second ventilation passage to introduce external air. And, in the motor, a first minute gap is provided between an end portion of a first fan main plate and an inner circumference portion of the first bracket, cooling wind is discharged to the motor outside via the second ventilation passage, an outer circumference portion of the first fan, a ventilation portion in the first bracket and the first ventilation passage, and the second ventilation passage is made so that the cooling wind entered from the first air intake port flows around the rotor shaft portion between the first ventilation fan and the first bearing.

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: Provided is a double-rotor type motor including: a stator; a double-rotor that is positioned at a certain gap on an outer surface and an inner surface of the stator; a rotor support on which the double-rotor is integrally formed and a plurality of air passages are radially penetratively formed; and a heat dissipation unit that is integrally formed with the rotor support and that forcibly ventilates outer air into the air passages during rotation of the rotor, to thereby dissipate heat generated from the stator. Thus, outer air may be forcibly ventilated to the stator, to thereby improve the heat dissipation efficiency of the stator.

Abstract: The present disclosure relates to a superconducting rotating electrical machine and a manufacturing method for a high temperature superconducting film thereof. The superconducting rotating electrical machine includes a stator, and a rotor rotatable with respect to the stator, the rotor having a rotary shaft and a rotor winding. Here, the rotor winding includes tubes disposed on a circumference of the rotary shaft and each forming a passage for a cooling fluid therein, superconducting wires accommodated within the tubes, and a cooling fluid flowing through the inside of the tubes. This configuration may allow for direct heat exchange between the superconducting wires and a refrigerant, resulting in improvement of heat exchange efficiencies of the superconducting wires.

Abstract: Embodiments of the invention provide an electric machine module and a method for cooling an electric machine. The apparatus and method include providing the electric machine including a rotor and a stator with stator end turns and enclosing at least a portion of the electric machine within a housing. The method also includes introducing a coolant into a machine cavity, directing the coolant toward the stator end turns, and returning a portion of the coolant which flows past the stator end turns back toward the stator end turns using a rotating agitator member operatively coupled to the rotor.

Abstract: An electric machine has a stator and a rotor arranged on a rotor shaft for rotation about a shaft axis, wherein the shaft axis defines an axial, a radial and a tangential direction. The rotor has at least one continuous axial rotor channel. The stator has a lamination stack extending over the rotor viewed in the axial direction. The lamination stack completely surrounds the rotor, forming a closed inner rotor chamber and has at least one axial stator channel running continuously in the axial direction and that is completely closed when viewed on the sectional plane. The electric machine has covers which are designed to form in conjunction with the lamination stack at least one radial channel running in the radial direction. The radial channels connect the axial stator channel(s) to the inner rotor chamber by means of a fluid connection but are otherwise closed.

Abstract: A generator, for example of a wind turbine, includes two end plates and a plurality of stator laminate plates arranged between the two end plates, is described. Each laminate plate and each end plate comprise a number of cooling holes which are located such that the cooling holes of the laminate plates and the cooling holes of the end plates are aligned with each other to form a number of cooling ducts by the stator material itself. Furthermore, a method for cooling a laminated stator of a generator is described having a cooling fluid guided via a tubing from a cooling fluid reservoir into at least one a partly open cooling duct in the laminated stator.

Abstract: Embodiments of the invention provide an electric machine module including a module housing, which can at least partially define a machine cavity. In some embodiments, an electric machine can include a stator assembly and a rotor assembly and can be positioned in the machine cavity. In some embodiments, the module housing can include a coolant transport network, which can include at least one passage in fluid communication with at least one first annulus and at least one second annulus. In some embodiments, the first annulus can be substantially axially adjacent to an axial end of the stator assembly and the second annulus can be substantially axially adjacent to an axial end of the rotor assembly. In some embodiments, the annuli can include a plurality of annulus apertures.

Abstract: Provided are a slim type motor having a heat radiating structure, that quickly dissipates heat generated from the inside of the motor to the outside of the motor although the motor is formed in a slim structure, by implementing the slim structure with respect to a lengthy direction of a rotating shaft and simultaneously implementing the heat radiating structure that emits heat generated from a stator as a rotor rotates in opposition to the stator in a narrow space in view of the nature of the slim structure, and a direct drive washing machine.

Abstract: Embodiments of the invention provide an electric machine module including a housing. The housing can include a machine cavity. In some embodiments, an electric machine can be at least partially positioned within the machine cavity and can include a stator assembly. The stator assembly includes a stator core with slots. In some embodiments, conductors can be positioned in the slots. The conductors include a turn portion extending between leg portions. The leg portions include an angled portion and a connection portion. The conductors are disposed within the plurality of slots so that the angled and connection portions extend from the stator core at a first axial side. At least one insulation member can be disposed over at least some of the leg portions so that the connection portions are at least partially uncovered.

Abstract: A rotor defines an axial direction and a radial direction relative to an axis of rotation and includes an annular hub and a core disposed radially outward of the annular hub. The core defines a first axial side and a second axial side. First radial feed holes are formed in the annular hub, and are located between the first and second axial sides. Axial channels are formed between the core and the annular hub, and are in fluid communication with the first radial feed holes and span substantially between the first and second axial sides. The rotor also includes a first member and a second member, adjacent to the first and second axial sides, respectively. First and second apertures are formed in the first and second members, respectively. Each of the first and second apertures is in fluid communication with one of the axial channels.

Abstract: A cooling structure includes a rotating electrical machine (1) that has a stator (3), the stator including plural split cores (4) annularly combined, and a shrink-fitted ring (5) mounted to the outer periphery of the plural split cores (4) for integrating the plural split cores (4), and a case (10) that accommodates the rotating electrical machine (1) therein, the shrink-fitted ring (5) includes a cylindrical portion (6), and a flange portion (7) that is provided at one end of the cylindrical portion (6), the case (10) includes an accommodating portion (11) which has an inner peripheral wall (11a) whose inner diameter is larger than the outer diameter of the cylindrical portion (6) and smaller than the outer diameter of the flange portion (7), and in which accommodates the stator (3), a first wall face (12) extending outward in the radial direction from the end of the inner peripheral wall (11a) where the flange portion (7) is arranged, the flange portion (7) being mounted to the first wall face (12), and a s

Abstract: An apparatus and method for the installation and removal of permanent magnets in a permanent magnet electromechanical machine, for example a wind turbine power unit generator. A magnet holder is mounted on a magnet carrying structure such as a rotor. Permanent magnets may be inserted into and removed from the magnet holder after the electromechanical machine is assembled. The magnet holders define passages for airflow between the inside top and magnet surface. In this manner, permanent magnets may be installed on the magnet carrying structure and provided with additional cooling via said passages. Further, the holders may be configured to secure the magnets by an interference fit, without using bolts or adhesives, to facilitate both assembly and removal for maintenance and repair.

Abstract: The invention relates to a component such as a rotor or stator for an electrical machine. The component includes a plurality of axially adjacent stacks of laminations. At least one pair of adjacent stacks are spaced apart in the axial direction by spacer means such that a passageway or duct for cooling fluid, e.g. air, is formed therebetween. The spacer means comprises a porous structural mat of metal fibres. The cooling fluid may flow through the spaces or voids between the fibres.

Abstract: A totally enclosed motor which includes a rotor disposed inside a housing and a heat of the rotor is transferred to the housing, a stator disposed inside the housing and a heat of the stator is transferred to the housing, and an inner fin which is disposed in the rotor and agitates air inside the housing. The totally enclosed motor is cooled by a forced convection by an outer fan disposed outside the housing, or by a natural convention in the vicinity of an outer surface of the housing, and a shape of the rotor is different between one end side and the other end side of the rotor in an extending direction of a rotary shaft of the rotor.

Abstract: Some embodiments of the invention provide an electric machine module comprising an electric machine including a rotor assembly and a rotor hub. In some embodiments, the module can include a output shaft substantially circumscribed by the rotor hub and including at least one channel and at least one coolant outlet. A cavity can be formed by at least the output shaft and the rotor hub. Some embodiments can include a sleeve substantially circumscribing a portion of the output shaft with at least a portion of the sleeve positioned substantially within the cavity between the output shaft and the rotor hub. The sleeve can include at least one groove.

Abstract: An electric machine including a housing, a stator mounted within the housing, a rotor rotatably mounted within the housing relative to the stator, and a coolant system fluidly connected to the housing. The coolant system delivers a flow of coolant through the housing. A coolant temperature sensor is arranged within the housing and exposed to the flow of coolant. The coolant temperature sensor configured and disposed to detect a temperature of the coolant in the housing.

Abstract: A motor stator with heat dissipation structure for fan includes a silicon steel plate assembly having a plurality of magnetic-pole columns, on each of which at least one winding is wound, and a space is defined between any two adjacent magnetic-pole columns; a covering being a heat-conducting plastic material filled in the spaces while covering the silicon steel plate assembly and the windings; and a plurality of heat pipes being extended into or through the covering filled in the spaces, so that heat produced by the silicon steel plate assembly and the windings during operation thereof can be transferred to the covering, and the heat pipes can absorb the heat from the covering and dissipate the absorbed heat into ambient air. Therefore, the silicon steel plate assembly and the windings can have lowered temperature and the cooling fan can have upgraded heat dissipation characteristic.

Abstract: Embodiments of the invention provide an electric machine module including an electric machine with a stator assembly. The stator assembly includes a plurality of stator laminations and the plurality of stator laminations include a plurality of different outer diameters. The plurality of stator laminations are positioned relative to one another to form radially-extending fins. At least one circumferential coolant channel is defined along the circumference of the stator assembly by the plurality of stator laminations at least partially between the radially-extending fins.

Abstract: A motor generator serving as a rotating electric machine includes: a rotor; a rotor shaft rotating with the rotor; and end plates and provided at opposite ends, respectively, of the rotor. The rotor shaft has oil channels and provided independently of each other and passing oil therethrough. The end plates and have oil channels and communicating with the oil channels and, respectively, and guiding oil to the rotor. The oil channels and are formed so as to avoid passing oil in a stream having vector components facing one another, as seen in the axial direction of a center axis, on the route of the channels. The oil channels and are formed so as to avoid passing oil in a stream having vector components facing one another, as seen in the axial direction of the center axis, on the route of the channels. The rotating electric machine thus allows the rotor to be cooled uniformly.

Abstract: A stator coil includes first to fourth in-slot portions and first and second turn portions. Both the first and third in-slot portions are received in one slot of a stator core, while both the second and fourth in-slot portions are received in another slot. The first and second turn portions both protrude from an axial end face of the stator core and respectively connect the pair of the first and second in-slot portions and the pair of the third and fourth in-slot portions. The second turn portion is located inside the first turn portion. When viewed along an axial direction of the stator core, the first and second turn portions extend so as to cross each other with a reference line C interposed therebetween; the reference line C is defined to extend along a circumferential direction of the stator core through an intersection between the first and second turn portions.

Abstract: An electric rotating machine including a rotor rotating relative to a stator, the rotor rotating a first fan placed at a first end of the stator, and a second fan placed at a second end of the stator opposite to the first end, the first and second fans being configured to generate an air flow from the first fan to the second fan through the rotor and the stator, the first fan comprising an external ring connecting the radial ends of blades together.

Abstract: A system and method for cooling an electric motor comprising a plurality of laminations defining a lamination stack, a coolant passage and a motor winding. Coolant is pumped into the coolant passage and forced along the entire length of the lamination stack. The coolant is then sprayed on the motor winding in order to cool the motor winding.