Abstract: The cooling device is intended for an electric motor and has a rotor cooling flange and a stator cooling flange (2), of which one is rotatable with respect to the other. At least one of the two cooling flanges (2) is provided with cooling ribs (8) arranged distributed over its circumference. During operation of the electric motor, at least one of the two cooling flanges gives off heat to the surrounding air. At least some of the cooling ribs (8) of a heat-emitting cooling flange (2) have an undulating profile over their length. In this context, the surface area of a cooling rib (8) having an undulating profile is larger than the surface area of the associated straight reference rib.

Abstract: An electric motor includes a stator operable to produce a magnetic field and defining an opening, and a rotor at least partially disposed within the opening. The rotor includes a shaft extending along a rotational axis, a first rotor magnetic core portion including a plurality of laminations stacked contiguously on the shaft, and a second rotor magnetic core portion coupled to the plurality of laminations. The first rotor magnetic core portion and the second rotor magnetic core portion cooperate to define the rotor magnetic core. A plurality of windings is coupled to the rotor magnetic core and an air flow path is formed as part of the second rotor magnetic core portion. The air flow path includes an axial portion that passes through the shaft axially along the rotational axis and a radial portion that extends radially outward through the second rotor magnetic core portion.

Abstract: A permanent-magnet direct-drive wind power generator, a system and a stator thereof are provided. The stator includes a stator support, a stator iron core arranged around an outer peripheral wall of the stator support and a blade side tooth pressing plate arranged on an axial end face at a blade side of the stator iron core. At least one first air hole is provided in the outer peripheral wall of the stator support, and at least one second air hole is provided in the blade side tooth pressing plate, and further includes at least one air flow passage via which the first air hole and the second air hole are in communication with each other, and the air flow passage passes through the interior of the stator iron core. The stator can introduce air flow inside the stator support to an axial end face of the stator iron core.

Abstract: In a multi-gap rotating electric machine, a side stator coil is received in a side space formed in a housing to connect radially inner and radially outer stator coils across a rotor. A cooling oil flow adjustment member is provided to adjust flow of cooling oil in the side space. The adjustment member has cooling oil guide channels formed on an uneven surface thereof facing the side stator coil. When viewed along a central axis of a rotating shaft: on an upper apart of the uneven surface which is located above the central axis, the cooling oil guide channels spread from a reference line to both sides of the reference line while extending downward; and on a lower part of the uneven surface which is located below the central axis, the cooling oil guide channels converge on the reference line from both sides of the reference line while extending downward.

Abstract: The disclosure provides for compositions and methods for the collection of rare cells using an interspersed microstructure design.

Abstract: A stator structure includes a main body. The main body has multiple poles. The poles outward extend from the main body. Each pole has a free end. An end face of the free end of the pole has an extension section normal to the main body. The extension section has multiple protrusion blocks. Each two adjacent protrusion blocks define therebetween a recess. The stator structure is able to greatly enhance the operation efficiency of the motor and lower manufacturing cost.

Abstract: A cooling system for an electric machine is provided. The cooling system includes an airflow diverter feature configured to provide even distribution of airflow to the electric machine. The airflow diverter feature includes a circular disk mounted to the housing of the electric machine. The disk defines a plurality of vents forming an axial air passage. A plurality of radial air passages are in fluid communication with the axial air passage. The airflow diverter feature defines at least one inlet and at least one outlet. The inlet comprises at least one interior choke and the outlet comprises at least one exhaust choke. The interior choke and the exhaust choke are sized to control a rate of air flow through the radial air passages.

Abstract: A core for an electric machine includes a core component having a plurality of core teeth defining a plurality of core slots between adjacent core teeth of the plurality of core teeth. The plurality of core slots are receptive of one or more windings. A coolant flowpath through the core component is formed through at least one core tooth. The at least one core tooth has one or more coolant tube banks and one or more mixing chambers arranged in an alternating pattern along the at least one core tooth.

Abstract: A venting device to define a venting pathway between adjacent stacked laminations of a stator assembly of an electric machine is provided. The venting device comprises a first mesh plate and a second mesh plate. The first mesh plate includes a set of angled first slats and a set of first interconnecting members connecting adjacent first slats. The second mesh plate includes a set of angled second slats and a set of second interconnecting members. The set of angled second slats are disposed above the set of first slats. The set of second interconnecting members connect adjacent second slats and are positioned offset from the set of first interconnecting members.

Abstract: An electric machine stator is provided and includes laminations consolidated along an axial direction to form a core element such that the core element includes an end lamination at an axial end of the core element. The end lamination includes a body extending in a plane and a plurality of spacer protrusions protruding along the axial direction from the plane. Each of the spacer protrusions of the plurality of spacer protrusions is configured for consolidation with another core element to define a radial vent between the core element and the another core element.

Abstract: According to an embodiment, radially extending inner spacers are provided in a stator core at a distance from each other in the circumferential direction at intervals between a prescribed number of stacked magnetic steel plates, and ventilation ducts for cooling gas flow are formed in the radial direction. The perimeter of each ventilation duct is defined by the inner spacers and a magnetic steel plate separated by the inner spacers. The cooling gas, which flows in the rotation direction, is split laterally to both sides of a rotor coil and directed toward the outer circumference. Portions of the shoulder parts of a wedge are cut off such that the width of the shoulder parts of the wedge at positions corresponding to the ventilation ducts matches the slot width.

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: A generator for an electrical machine having a stator and a rotor is provided. The rotor is rotatable around a center axis and relatively to the stator. The stator is built of a stator stack with a number of adjacently disposed metal plates and the stator further includes a number of stator windings which are at least partially wound around the metal plates with a certain distance to each other. At least one radial duct-like channel is provided between two or more adjacently disposed metal plates by spacers, wherein the spacers are arranged underneath the stator windings in such a manner that the at least one radial duct-like channel is radially open.

Abstract: A double-walled cooling housing (1) for an electrical machine (13). The cooling housing (1) comprises an inner housing (3), an outer housing (5) and a force transmission element (7). The outer housing (5) surrounds the inner housing (3). The force transmission element (7) is arranged between the inner housing (3) and the outer housing (5) and the force transmission element transmits forces that act on the inner housing (3) to the outer housing (5). Moreover, the force transmission element (7) guides cooling fluid between the inner housing (3) and the outer housing (5).

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 electro-mechanical rotating machine spacer block includes at least one base spacer portion having first and second lamination surfaces separated by an inner edge portion and an outer edge portion. The inner edge portion includes a concave curvilinear profile and the outer edge portion includes a convex curvilinear profile.

Abstract: A cooling support element for a stator segment of an electrical machine is provided. The cooling support element has a first and a second plate each having an upper surface and a lower surface. The upper surface of the first plate has anchoring element for anchoring a stator lamination stack attached to the cooling support element. The lower surface of the second plate has an inlet and an outlet opening. The two plates are attached to each other. The lower surface of the first plate faces the upper surface of the second plate. Separator elements are disposed between the lower surface of the first plate and the upper surface of the second plate for providing a cooling channel. A cooling fluid is guidable from the inlet opening through the cooling channel to the outlet opening for dissipating heat from the stator lamination stack.

Abstract: Embodiments of the invention relate generally to electrical machines and, more particularly, to electrical machines containing a coil block assembly for cooling conductive coils. In one embodiment, the invention provides an electrical machine comprising: at least one tooth coil including: a stator tooth; and at least one conductive coil wound around the stator tooth, forming a plurality of coil turns; a coil block assembly between a first turn and a second turn of the plurality of coil turns, the coil block assembly including: at least two coil blocks, each coil block including a body and a face having at least one recess into the body, wherein the coil blocks are oriented with faces opposed, such that at least one cooling channel is formed by the at least one recess of each coil block.

Abstract: A dynamoelectric machine includes a rotor having a plurality of adjacent coils; a spaceblock disposed between adjacent coils to define at least one cavity adjacent the spaceblock and between mutually adjacent coils; and the spaceblock including a body having one of: a substantially T-shaped cross-section, a substantially hexagonal cross-section and a substantially truncated arrow cross-section, the cross-section providing at least one flow deflector structure on at least one cavity facing surface of the spaceblock for intercepting and redirecting circulating coolant flow in the cavity towards a central region of the at least one cavity.

Abstract: There is disclosed a rotary electromotor including a stator, a stator winding on the stator, a stator frame, a rotator, end covers, and a highly heat-conductive member. The stator has a plurality of magnetic poles. The stator frame supports the stator. The rotator is supported by the stator with a gap therefrom such that the rotator is rotatable. The end covers close opposite ends of the stator frame. The highly heat-conductive member is fixed by a resin material in a space defined inside the stator, the stator frame, and the end covers.

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 stator assembly includes a segmented stator having stator portions. Each stator portion includes stator laminations having stator windings, spacer plates having a portion embedded within the stator laminations, and structural plates having a portion embedded within the stator laminations. The portion of each of the spacer plates and each of the structural plates has notch-like structures that create openings to allow a cooling medium to flow between the notch-like structures to provide radial cooling of the stator windings. Connectors are provided to connect the stator portions of the segmented stator together.

Abstract: Provided is a motor including: a motor shaft; a rotor rotating about the motor shaft; a stator disposed around the rotor; a casing accommodating the rotor and the stator; a cover covering a heat radiation target end surface of the stator while supporting one end portion of the motor shaft; a heat transfer layer having an electric insulation property and interposed between the stator and the casing to transfer heat from the stator to the casing; and a heat transfer sheet provided separately to the heat transfer layer to transfer heat generated in the stator to the casing, wherein the heat transfer sheet has an electric insulation property and a heat transfer property and is interposed between the heat radiation target end surface of the stator and the cover so as to contact the heat radiation target end surface and the cover.

Abstract: An electric power tool includes a motor, a speed reduction mechanism, a power output unit, a control circuit unit, and a housing. The housing provided with an air supply-exhaust hole. The motor includes a stator core wound with coils, a rotor core and an electronic circuit unit. The electronic circuit unit includes a circuit board, electronic components arranged in the circuit board and including a switching element, coil connection portions arranged in the circuit board and connected to the coils and a control circuit connection portion arranged in the circuit board and connected to the control circuit unit. The motor further includes a radiator member for dissipating heat generated in the switching element of the electronic circuit unit and an insulating cover member molded to cover the electronic components, the coil connection portions, the control circuit connection portion, the circuit board and the radiator member.

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

Abstract: Embodiments of the invention provide an electric machine module. The module can include a module housing, which can comprise a sleeve member. In some embodiments, the sleeve member can include an inner wall and an outer wall, and the module housing can at least partially define a machine cavity. In some embodiments, a coolant jacket can be positioned substantially between a portion of the inner wall and a portion of the outer wall. Also, in some embodiments, at least one boss can be positioned in the sleeve member so that the at least one boss can be substantially integral with both the inner wall and the outer wall, and can extend through a portion of the coolant jacket.

Abstract: The present invention provides a rotor for a rotary electric machine, the rotor extending along a longitudinal axis and comprising: at least two poles defining between them an inter-pole space; and windings of electrical conductors wound around the poles, said windings including straight portions extending along the longitudinal axis of the rotor; at least one pole of the rotor, and in particular each pole of the rotor, including a spacer placed along at least a fraction of the straight portion between at least two conductor groups of the windings so as to form at least one cooling channel between the two conductor groups, enabling a cooling fluid to flow longitudinally and/or transversely within the windings, the spacer including at least one spacer element presenting a cross-section that is hollow, defining the cooling channel at least in part.

Abstract: A rotating electrical machine includes: a stator that including a stator core and a teeth section, with a stator coil wound at the teeth section; a rotor arranged via a clearance at an inner periphery side of the stator and supported in a freely rotating manner; and a distribution unit supported by a resin holder, and including a conductor connected to the stator coil. The rotating electrical machine is cooled by coolant. The stator coil includes a coil end section projecting from an end of the stator in an axial direction. A gap is formed between an end of the stator core and a lower surface of the distribution unit by mounting the distribution unit on an upper part of the coil end section. The gap constitutes a path for the coolant.

Abstract: Winding end turns in an electric machine are cooled by a coolant. Cooling is improved by redirecting the coolant generally tangentially through the winding end turns to improve heat transfer between coolant and windings.

Abstract: An air-gap is between a rotor and a stator. The stator comprises a number of stacked laminate-plates. The laminate-plates are positioned and fixed by a structural support and by end-plates in relation to a central-part of the stator to achieve the air-gap. A cavity is formed by the end-plates, the central-part of the stator, the air-gap and an internal surface of the rotor. An air-cooling arrangement is arranged and used to circulate a gaseous medium for cooling purposes inside the cavity.

Abstract: A dynamoelectric machine includes a rotor having a plurality of adjacent coils; a spaceblock disposed between adjacent coils to define at least one cavity adjacent the spaceblock and between mutually adjacent coils; and the spaceblock including a body having one of: a substantially T-shaped cross-section, a substantially hexagonal cross-section and a substantially truncated arrow cross-section, the cross-section providing at least one flow deflector structure on at least one cavity facing surface of the spaceblock for intercepting and redirecting circulating coolant flow in the cavity towards a central region of the at least one cavity.

Abstract: A generator for an electrical machine having a stator and a rotor is provided. The rotor is rotatable around a centre axis and relatively to the stator. The stator is built of a stator stack with a number of adjacently disposed metal plates and the stator further includes a number of stator windings which are at least partially wound around the metal plates with a certain distance to each other. At least one radial duct-like channel is provided between two or more adjacently disposed metal plates by spacers, wherein the spacers are arranged underneath the stator windings in such a manner that the at least one radial duct-like channel is radially open.

Abstract: A motor includes a base, a stator, a rotor, a circuit board and a heat-conducting insulator. The base includes a cooling plate. The stator is coupled to the base. The rotor is rotatably coupled to the base and aligned with the stator. The circuit board is received in the base and electrically connected to the stator. The heat-conducting insulator is disposed between the cooling plate and the circuit board, and abuts with the cooling plate and one face of the circuit board.

Abstract: A radial duct for a dynamoelectric machine having a rotor, and a plurality of radial slots in the rotor is provided. A plurality of coils are respectively seated in the radial slots, and the coils form a plurality of radially stacked turns. The radial duct includes one or more cooling slots defined in at least a portion of the radially stacked turns, and extend in a substantially radial direction to the rotor. At least a portion of an interior surface of one or more cooling slots includes one or more ribs for enhanced heat transfer.

Abstract: An apparatus is described for thermomechanical decoupling of the housing and stationary part of a rotating machine, in particular of a dynamoelectric machine. The apparatus has at least one rotating shell, and in that this apparatus can on the one hand be attached to the housing and on the other hand to the stationary part, such that the rotating shell extends in the axial direction even in the mounted state. This results in centered bearing, which is stiff against lateral movement of the stationary part, in particular of the laminated core, while providing little impediment to the thermal growth of the stationary part.

Abstract: A stator assembly includes a segmented stator having stator portions. Each stator portion includes stator laminations having stator windings, spacer plates having a portion embedded within the stator laminations, and structural plates having a portion embedded within the stator laminations. The portion of each of the spacer plates and each of the structural plates has notch-like structures that create openings to allow a cooling medium to flow between the notch-like structures to provide radial cooling of the stator windings. Connectors are provided to connect the stator portions of the segmented stator together.

Abstract: A rotor for an electrodynamic machine includes a laminated core having a plurality of lamination segments arranged in series in an axial direction, wherein the laminated core includes cooling ducts formed by duct spacers disposed between axially adjacent lamination segments, wherein the duct spacers are configured to resist centrifugal forces acting on the duct spacers and are supported by axial bolts extending through the laminated core in the axial direction.

Abstract: A motor assembly includes a housing, a revolving shaft revolvably mounted in the housing, a magnet mounting portion surrounding and rotatable with the revolving shaft, a magnet disposed on the magnet mounting portion, a magnetically inducible core having a plurality of stator poles spaced apart from rotor magnetic poles of the magnet, and a plurality of stator windings wound on the stator poles, respectively. The stator windings are spaced apart from end walls of the housing by axial intervals. A thermally conductive bridging member is disposed to span the axial intervals to conduct heat emanating from the stator windings to the end walls so as to dissipate heat out of the housing.

Abstract: A rotating electrical machine, especially a turbogenerator, includes a rotor and a stator, which concentrically surrounds the rotor and is terminated at each of the two axial ends by a laminated press plate (14), which is constructed from a stack of individual press plate laminates (30). The electrical properties are improved by providing the press plate laminates (30) at least partially with slits (26) for reducing the eddy current losses.

Abstract: The present invention provides a rotor for a rotary electric machine, the rotor extending along a longitudinal axis and comprising: at least two poles defining between them an inter-pole space; and windings of electrical conductors wound around the poles, said windings including straight portions extending along the longitudinal axis of the rotor; at least one pole of the rotor, and in particular each pole of the rotor, including a spacer placed along at least a fraction of the straight portion between at least two conductor groups of the windings so as to form at least one cooling channel between the two conductor groups, enabling a cooling fluid to flow longitudinally and/or transversely within the windings, the spacer including at least one spacer element presenting a cross-section that is hollow, defining the cooling channel at least in part.

Abstract: A rotary cooling system is provided that includes a stator having at least one tooth and a plurality of wires coiled around the tooth and a passage extending between the plurality of wires.

Abstract: A variable reluctance electric machine comprising a rotor and a stator; the stator having two or more electromagnetic windings and the rotor having a plurality of salient poles, the salient poles defining axially extending cooling fluid channels; wherein the salient poles and the cooling fluid channels are circumferentially skewed along at least a part of their length whereby in use the cooling fluid channels impel cooling fluid in a substantially axial direction towards the electromagnetic windings and the stator to facilitate heat transfer and dissipation from the windings.

Abstract: A rotor includes a rotor core and disk-shaped end plates provided to sandwich the rotor core in the direction of a rotation shaft. The end plates are each formed to have one end face relatively closer to the rotor core and larger in outer diameter with the center at the rotation shaft than the other end face.

Abstract: The invention includes an electric machine having a rotor, a stator and at least one electrical coil disposed in the machine and a source of coolant fluid in communication with the coil. The coil has concentric turns having spaces therebetween adapted to channel coolant flow between the concentric turns.

Abstract: A rotor for an electrodynamic machine includes a laminated core having a plurality of lamination segments arranged in series in an axial direction, wherein the laminated core includes cooling ducts formed by duct spacers disposed between axially adjacent lamination segments, wherein the duct spacers are configured to resist centrifugal forces acting on the duct spacers and are supported by axial bolts extending through the laminated core in the axial direction.

Abstract: A coaxial stack of laminations for a stator of an electrical machine uses laminations that are substantially identical and in direct abutment with one another. Each of the laminations has an outer periphery and an inner periphery with the outer periphery being defined by an array of outwardly projecting pins and the inner periphery being defined by an array of inwardly projecting teeth. The outwardly projecting pins cooperate with a jacket surrounding the stack to provide a cooling space through which cooling liquid flows while the teeth provide spaces therebetween for receiving for receiving stator windings. The number of pins (npin) is proportional to the number of teeth (nth) according to the relationship (2K+1)/(2Kth) times the number of teeth (nth), where K is a selected integer number and Kth is the number of teeth past which each lamination is rotated with respect to adjacent laminations so that spaces between the teeth of adjacent laminations are aligned.

Abstract: In a tandem AC generator for a vehicle having dual armature core-Lundel type field core pairs placed in series, an intermediate ring as a cylindrical spacer is placed between the dual armature cores. One armature core, the intermediate ring, and the other armature core are pressed and tightly fastened to each other in the direction of a rotary shaft by front and rear housings by a through bolt. A circumference wall part of the front housing accommodates one armature core and the intermediate ring completely and further accommodates a part of an outer circumference surface of the other armature core. This simple construction of the tandem AC generator provides improved and superior vibration proof.

Abstract: A device and system for removing heat from a magnetic device such as an electromagnet core section of a magnetic bearing internally by convection. The device includes a ribbon-type conductor portion and an insulator portion that are spirally and coaxially arranged on a coil. The insulating portion includes window portions that provide a fluid passage when the insulating portion is sandwiched between adjacent conductor portions. The device can be disposed in a plenum in the electromagnet core section and at least one opening in the core section, through which a cooling fluid can be introduced into the plenum, can be provided.

Abstract: A high speed, high power generator has its main stator configured with one or more reduced-diameter sections. The generator includes a generator housing, a main rotor, and a main stator. The generator housing has a main stator cooling flow passage formed therein that is configured to receive a flow of a cooling medium. The main rotor is rotationally mounted in the generator housing. The main stator is mounted within the generator housing and surrounds at least a portion of the main rotor. The main stator includes a stator core coupled to the generator housing adjacent the main stator cooling flow passage, and includes two or more nominal-diameter sections and one or more reduced-diameter sections. The nominal-diameter sections each have a first outer diameter, and the reduced-diameter sections, each have a second outer diameter that is less than the first diameter.

Abstract: An AC synchronous motor, also known as a stepper motor, uses its magnetics and drive coils to produce both motion and excitation for sets of position sensing coils. Each drive phase is equipped with one or more sensing coils, which may be differentially wound, with the coils configured to act as secondaries of a linear variable differential transformer (LVDT). The primary of the so-formed LVDT is the motor drive winding. The outputs from these coils are fed to a microprocessor or DSP through an internal or external A/D converter. The microprocessor or DSP decodes the measured voltages using resolver strategies to produce a position measurement. An alternate mode of operation uses these same coils to form a variable reluctance resolver. This alternative mode of operation could be used for sensing coarse position while the motor drive is not energized.