Abstract: A method of fabricating a coil for mounting on a tooth of a stator or a rotor of an electric machine includes winding a wire about a mandrel to form a coil having a first shape corresponding to the shape of the mandrel. The method may also include removing the coil having the first shape from the mandrel, and applying a mechanical force on the coil to change the shape of the coil from the first shape to a second shape. The second shape may correspond to the shape of the tooth. The method may also include mounting the coil of the second shape on the tooth.

Abstract: A stator for a rotating electrical machine includes a stator coil and a stator iron core having slots into which the stator coil is mounted, wherein a coil end of the stator coil is elliptical in shape around a center axis of the stator iron core.

Abstract: A winding system for a stator of an electric machine is specified. The winding system comprises at least two first conductor segments and at least two second conductor segments, at least two half-bridges, at least one first short-circuit means and at least one second short-circuit means. Each half-bridge is connected to least one first conductor segment and one second conductor segment, each first conductor segment is connected to the first short-circuit means, and each second conductor segment is connected to the second short-circuit means. Further, an electric machine having a winding system is specified.

Abstract: An electrical machine (20) has a stator (22) comprising: a core (50) having a first end (52) and a second end (54); one or more windings carried by the core and having: one or more first portions (62) protruding from the first end; and one or more second portions (64) protruding from the second end. A rotor (24) is mounted for rotation relative to the stator about an axis (500, 502). One or more chambers (70, 72) surround the one or more first portions and the one or more second portions. Ferromagnetic particles are in a fluid in the one or more chambers. The machine has means (80, 82, 104, 106) for varying a concentration of the ferromagnetic particles in the one or more chambers.

Abstract: Provided is a liquid cooling structure of a rotating electric machine, which is capable of suppressing the reduction of cooling efficiency even with a coil using a flat lead wire. Guide block walls 12Ac are provided on both sides in the width direction of a bobbin 12 along the axial direction of a stator 10 so as to position each between adjacent teeth portions 11b in the circumferential direction of a stator core 11 of the stator. A gap is formed between the coil 13 and the guide block wall 12Ac, and the guide block walls 12Ac are positioned adjacent to each other so as to make a closing between the guide block walls 12Ac of adjacent bobbins 12.

Abstract: A cooling device for a stator of an electrical machine, for fitting together with a hollow cylindrical laminated core of the stator, includes multiple cooling channels for conducting cooling fluid along the laminated core, and a fluid ring for provision on an end face of the laminated core. The fluid ring has two fluid ring channels for distributing the cooling fluid to the cooling channels and for receiving the cooling fluid from the cooling channels, and at least two cooling fluid connections for introducing and removing the cooling fluid into and from the fluid ring channels. The fluid ring channels have circumferential-angle-dependent flow cross-sections in the flow direction, in order to evenly distribute the cooling fluid to the cooling channels.

Abstract: A winding overhang (20) configured for supporting windings of an electric motor (40) comprise a cylindrical wall (22) extending around a center axis (A). The cylindrical wall (22) includes a plurality of grooves (28a-28e) formed along the circumference (37, 38) of the cylindrical wall (22), each groove (28a-28e) having a constant width (W) along the circumference (37, 38); and a plurality of openings (26) having different heights (H1, H2, H3, H4, H5). Each opening (26) extends from an end surface (36) of cylindrical wall (22) and allows a wire (30a-30c) to pass between an outer area (34) outside the cylindrical wall (22) and an inner space (32) defined by the cylindrical wall (22).

Abstract: A stator of an electrical machine which has stator slots and conductor elements arranged in the stator slots, which conductor elements each have two conductor ends, is already known. A plurality of conductor ends, which are situated next to one another, of different conductor elements are in each case connected to one another by means of a weld connection, which is provided at the end sides of the conductor ends in question, without additional material. The conductor ends which are connected to one another in each case form a common rectangular conductor cross section which has a height H and a width B, wherein the height H corresponds to the height h of an individual cross section of the conductor ends, and the width B of the common conductor cross section is made up of the sum of the widths b of the individual cross sections of the conductor ends. The weld connection is in each case provided, as seen in the direction of the width B, between two non-melted edge sections of the outermost conductor ends.

Abstract: An electric starter-generator is described. The generator may comprise a rotor, a housing, two bearings, a stator, and a cooling-fluid flowpath. The cooling-fluid flowpath may comprise a cooling-fluid entrance and exit, and a cooling-fluid channel in fluid communication with the entrance and exit. At least a portion of the channel may be defined by a fluid-tight coupling of the housing and a sleeve radially surrounding the outer race of either the bearings. The portion may form an annulus about the axis. The portion may comprise a radially inner surface defined by the sleeve, a radially outer surface define by said housing, and two axial surfaces. The two axial surfaces may extend a distance from the radially inner to outer surfaces that is less than a distance from one of the two axial surfaces to the other of the two axial surfaces.

Abstract: Provided is a terminal device for a rotary electric machine, in which a plurality of conductive members, each having a first connecting portion having a flat plate shape, are provided to a base made of an insulating material. Each of a plurality of connection terminals has a second connecting portion having a flat plate shape. The second connecting portion is connected to a corresponding one of the first connecting portions. After a processed connecting portion being at least any one of the first connecting portion and the second connecting portion is formed through press-working performed for a conductive flat plate, compression processing is performed for a front surface and a back surface at both ends of the processed connecting portion in a width direction of the processed connecting portion.

Abstract: An electric motor includes a stator, and a metal component that is in contact with the stator. The stator includes a first tooth, a second tooth, a first winding wound around the first tooth by concentrated winding, a second winding wound around the second tooth by concentrated winding, and a thermal conduction sheet held between the first winding and the second winding. The thermal conduction sheet is held between the metal component and the first winding in a deformed state.

Abstract: An electric motor includes a rotor rotatable about a rotation axis, and a stator that externally surrounds the rotor and includes a stator core and coils wound on the stator core. The windings are defined by a winding wire including winding wire end portions that are electrically contacted at end surfaces thereof by busbars held at least partially in a busbar holder, and include a ground contact to connect the stator to a ground potential. The ground contact includes a first end region received in a longitudinal groove on an outside of the stator core.

Abstract: The object of the invention is to improve operability of the process for inserting the coil conductor into the insulating member stored inside the slot of the rotor core. Each of the first insulating member and the second insulating member has one side arranged between the first coil and the second coil so that the respective sides are superposed along the radial direction of the stator core. The side of the first insulating member and the side of the second insulating member are connected with the first connection part at one end in the longitudinal direction.

Abstract: A Vernier external rotor machine for direct drive of a load is provided. The Vernier external rotor machine includes an external rotor configured to mechanically directly drive to a load.

Abstract: A radial flux electric machine includes a rotor configured to rotate about an axis of rotation and a stator fixedly positioned proximate the rotor. At least one of the rotor or the stator may include a plurality of teeth annularly arranged about the axis of rotation. Each tooth of the plurality of teeth may extend in a radial direction such that a plurality of cross-sectional areas of each tooth in a plurality of planes perpendicular to the radial direction may vary. And perimeters of the plurality of cross-sections may be substantially the same across the plurality of perpendicular planes.

Abstract: Provided is a rotating electric machine. Angles formed by tooth center axes of adjacent teeth are defined as tooth pitch angles. Maximum tooth pitch angles are defined as first tooth pitch angles ?1. At least one of tooth pitch angles become smaller as proceeding from the first tooth pitch angles ?1 in a clockwise direction and a counterclockwise direction, respectively, and such tooth pitch angles are defined as second tooth pitch angles ?3. Cross-sectional areas of second coils, which are arranged in slots each formed between adjacent teeth corresponding to the second tooth pitch angles ?3 in a cross-section perpendicular to a rotation axis, is smaller than cross-sectional areas of first coils, which are arranged in slots each formed between adjacent teeth corresponding to the first tooth pitch angles ?1 in the cross-section perpendicular to the rotation axis.

Abstract: The rotor of a rotor assembly for an electric machine includes first magnetic structures utilized for torque production in the electric machine. Second magnetic structures including second magnetic poles not utilized for torque production in the electric machine are polymer-bonded to at least one of the rotor and the rotor shaft.

Abstract: An integrated apparatus of water-cooled motor and driver includes a motor housing and a driver housing. The motor housing includes a motor-housing inner wall, a motor-housing outer wall, an inlet, a heat-dissipation flow channel and an outlet. The motor-housing inner wall surrounds and receives a motor assembly. The motor-housing outer wall surrounds the motor-housing inner wall, and the exterior thereof has a first connecting surface. The inlet is disposed on the motor-housing outer wall. One end of the heat-dissipation flow channel is connected to the inlet, the end contacts and is received between the motor-housing inner wall and the motor-housing outer wall. The outlet is connected to the other end of the heat-dissipation flow channel and is disposed on the motor-housing outer wall. The driver housing receives a driver assembly, and the exterior thereof has a second connecting surface connected with and bonded to the first connecting surface.

Abstract: A bus bar unit includes an inner bus bar and an outer bus bar extending in a circumferential direction about a central axis of a motor and connected to a coil of a stator and held by a bus bar holder which is a resin molded structure and the outer bus bar is disposed outward in a radial direction with respect to the inner bus bar. The bus bar holder includes a first inner support wall to support an outer circumferential surface of the inner bus bar, a first outer support wall to support an inner circumferential surface of the outer bus bar, openings open in parallel or substantially in parallel in at least one of the first inner support wall and the first outer support wall in the circumferential direction, and through which a lead wire of the coil passes, and a connection rib extending in the radial direction between the openings adjacent to each other in the circumferential direction to connect the first inner support wall to the first outer support wall.

Abstract: A wiring device includes a plurality of trenches and a plurality of channel sets. The trenches at least include a first trench, a second trench and a third trench, bottoms of which are respectively located at different height positions. Each of the channel sets at least includes a first channel, a second channel and a third channel. The first channels penetrate the wiring device from an outer sidewall thereof to the first trenches, respectively, the second channels penetrate the wiring device from the outer sidewall thereof to the second trenches, respectively, and the third channels penetrate the wiring device from the outer sidewall thereof to the third trenches, respectively. The wiring device has the advantages of a simple structure and a low cost for molding and manufacturing, and is suitable to perform winding by a manual or automatic machine and thus can prevent first output wires of the coil windings with in phase or out of phase from entangling or knotting with each other.