Abstract: An annular core piece in which an annular core piece can be received inside a contour of an outer circumstance of the annular core piece and the number of recesses formed on the outer circumstance is small is provided. In an annular core piece including a plurality of recesses opened in an outer circumferential part, the recess includes a narrowed part and a raised part, and a transverse width of the narrowed part is made narrower than a transverse width of a different region present on a side of a bottom of the recess further beyond the narrowed part, and the raised part is formed such that a part of the bottom of the recess is raised and projected toward an opening end of the recess.

Abstract: The present invention provides an apparatus for sensing rotor location, the apparatus comprising: a central shaft; a magnet coupled to the central shaft; a sensor portion is disposed correspond to the magnet; wherein the sensor portion comprising a substrate, a first group including a first Hall sensor and a third Hall sensor disposed on the substrate, and a second group including a second Hall sensor and a fourth Hall sensor, the first Hall sensor and the third Hall sensor are arranged to overlap in a radial direction about the central shaft and the second Hall sensor and the fourth Hall sensor are arranged to overlap in a radial direction about the central shaft.

Abstract: Provided is a rotary electric machine including a rotor and a stator. The rotor includes a refrigerant passage. An axial direction of the rotor is along the horizontal direction. The stator is placed around the rotor and includes a tubular stator core. The stator core includes: a communication passage via which an inner peripheral surface of the stator core communicates with an outer peripheral surface of the tubular stator core such that the communication passage guides the refrigerant from the inner peripheral surface of the stator core to the outer peripheral surface of the stator core; and a projection portion provided on the outer peripheral surface of the tubular stator core such that the projection portion extends in the axial direction of the tubular stator core. The projection portion is placed downward in the gravitational direction from an opening of the communication passage on the outer peripheral surface.

Abstract: A display device including a display panel, a shaft, a correcting sensor and a driving module is provided. The display panel has a display surface. The shaft has an axial end and a correcting end opposite the axial end. The correcting sensor is disposed on the correcting end. When the shaft is rotated relative to the axial end, the correcting sensor is moved to a second position from a first position and faces the display surface at the second position. The driving module is configured to translate the shaft when the correcting sensor is at the second position, such that the correcting sensor can be moved to a detecting position from the second position, wherein the distance of the second position relative to the display surface is greater than the distance of the detecting position relative to the display surface.

Abstract: A rotor and a motor including the same. The motor includes a stator and a rotor configured to rotate by interacting with the stator. The rotor includes a plurality of permanent magnets disposed in a circumferential direction of the rotor and rotor cores disposed between the plurality of permanent magnets. The rotor core includes a notch cut inward from a circumferential surface thereof, and the notch is formed in an asymmetric shape. The rotor core has a notch formed on one side of the circumferential surface and the rotor core has a shape inverted left and right with the rotor core are alternately stacked, so that a magnitude of a synthetic cogging torque generated in the rotor is reduced.

Abstract: A machined object that can prevent a coating material of a coating surface from peeling off when a machined surface that is adjacent to the coating surface is machined after coating of the coating surface. The machined object includes a main body and a coating material applied to the main body, the main body includes a machined surface that is machined, a coating surface that is arranged adjacent the machined surface via a boundary and to which a coating material is applied, and a recess formed in the main body and recessed toward an inner side of the main body from the machined surface and the coating surface at the boundary, and the recess extends along the boundary so as to separate the machined surface and the coating surface from each other.

Abstract: A motor and a rotating shaft cooling device thereof are disclosed. A rotating shaft of the motor is formed with an annular space. A shaft has a front end and a rear end. The shaft is a blind tube formed with a channel communicating with the annular space through a plurality of nozzles. The distance between the nozzles and the rear end is less than one-half of the length of the shaft. A cooling fluid flows through the nozzles to form a jet array to impinge on the inner wall of the rotating shaft to cool the rotating shaft, and flows back in the annular space to enhance the cooling effect, increase the heat exchange area, and improve the cooling effectiveness of the rotating shaft.

Abstract: In one possible implementation, a motor is provided including a rotor and a stator. Front cooling fins are thermally coupled to a front of the stator, and rear cooling fins are thermally coupled to a rear portion of the stator. The winding is between the front and rear cooling fins.

Abstract: An enclosure for an electric machine includes a housing defining an axial bore having an opening at a first end of the bore. The housing comprises a first wall having a first inboard surface partially defining the bore, and a first outboard surface spaced from the first inboard surface, the first wall defining a first coolant channel disposed between the first inboard and first outboard surface. An end cap is fastenable to the housing to cover the opening.

Abstract: An electric machine comprising at least one housing in which a rotor having coolant guide vanes provided at an end face is accommodated, and an annular cooling fin structure through which coolant conveyed by the coolant guide vanes is passed and having cooling fins which are axially covered by an annular cover section in such a way that there is an inlet area for the coolant supplied by the coolant guide vanes and an outlet area, wherein the cooling fin structure is formed on a side of an axial end wall of the housing facing the interior of the housing, on which an annular disk-shaped cover forming the cover section is attached.

Abstract: An electric motor for an appliance includes a rotor coupled with a drive shaft. The rotor includes a plurality of rotor magnets that each define a magnet assembly including a plurality of magnet portions having different magnet pole orientations. A stator is in electromagnetic communication with the rotor. A gap is defined between the stator and the rotor. The stator comprises a stator core. A plurality of stator poles define the gap. Stator magnets are positioned within the stator core and are located to partially define the gap. Each stator magnet defines a pair of flux paths that extend around an outer perimeter of the stator magnet and onto the gap. The different magnet pole orientations of the plurality of rotor magnets operate to direct an effective magnetic flux toward the gap.

Abstract: An electric working machine may include: a support rod constituted of metal; a tool disposed at a front end of the support rod; a motor configured to drive the tool; a control unit disposed at a rear end of the support rod and configured to control the motor; and a heat transfer structure configured to transfer heat from the control unit to the support rod.

Abstract: The invention relates to a rotating electrical flux-switching machine, comprising a rotatable tubular rotor (2), an inner first stator (3), and an outer second stator (4) that is concentric and spaced apart relative to the first stator (3), wherein the rotor (2) is arranged concentrically relative to the first and second stator (3, 4) and is arranged between the first and the second stator (3, 4) in such a way that a first air gap (10) is formed between the first stator (3) and the rotor (2), and a second air gap (11) is formed between the second stator (4) and the rotor (2). The invention also relates to an aircraft comprising a rotating electrical machine of this type.

Abstract: A hand-guided treatment device has a motor housing which includes a basic housing body that extends at least on a first housing side, and a remaining housing body, which is connected to the basic housing body and, together with the basic housing body, encloses a housing interior. A drive motor in the housing interior is held on the basic housing body. The basic housing body has a tool-holding device for holding a tool driven by the drive motor. The basic housing body forms a rigid motor- and tool-supporting structure which extends at least on the first housing side and on an adjoining second housing side, forming an L shape, wherein the remaining housing body forms a non-rigid remaining housing structure.

Abstract: A generator air gap baffle train assembly includes linearly aligned baffle segments, linearly aligned wedge blocks, and a tensioning rod. Each baffle segment includes a radially outer portion having an outer surface to interface with the axial slot and a side surface angled with respect to the outer surface and an axially aligned first thru bore and a radially inner portion which projects into an air gap. A pair of wedge blocks are positioned on opposing sides of the radially outer portion, each wedge block including a side surface that interfaces with the side surface of the radially outer portion so that the interfacing surfaces are in abutting contact and an outer surface that interfaces with the axial slot and a second thru bore axially aligned with the first thru bore of each baffle segment. The tensioning rod is enclosed by a non-conducting hollow tube spanning between adjacent baffle segments.

Abstract: A motor is provided. The motor includes a cooling system configured to cool a stator having a core wound around by a coil, wherein the cooling system includes oil holders installed on a side under the stator in an inner space of a motor housing and provided to allow oil to be collected up to a level capable of allowing at least some of a lower end section of the stator to be immersed for cooling.

Abstract: An electrical machine that is an outer runner motor having a rotor mounted rotatably about a machine axis, with the rotor rotatively attached to a shaft. A stator assembly having a stator core with a non-ferromagnetic material. An axial-flux yoke with an inner wall rigidly attached on an outer surface of a first edge wall of the stator core, or a radial-flux yoke with a continuous inner wall rigidly attached on a continuous outer wall of the stator core. Wherein the axial-flux yoke or the radial-flux yoke, include laminated sheets and slots. Windings can be positioned in the slots of either the axial-flux stator yoke or the radial-flux stator yoke. Wherein the stator core and the shaft include a spline coupling feature adapted to selectively couple and mate the stator core to the shaft.

Abstract: An electric drive apparatus includes a rotating electric machine and a transmission. The transmission is provided, on one axial side of the rotating electric machine, integrally with the rotating electric machine. The rotating electric machine includes a stator coil that is assembled to a stator core to have first and second coil end parts respectively protruding from first and second axial end faces of the stator core. The axial protruding height of the second coil end part from the second axial end face of the stator core is larger than the axial protruding height of the first coil end part from the first axial end face of the stator core. The first coil end part is located on the same axial side of the stator core as the transmission whereas the second coil end part is located on the opposite axial side of the stator core to the transmission.

Abstract: A flux machine includes a stator and a rotor. A set of electrical coil assemblies with side surfaces and sets of plural permanent magnets are arranged circularly on the stator and the rotor. Pole faces of the magnets are positioned adjacent to and spaced apart from side surfaces of permeable cores of the coil assemblies. In each coil assembly a pair of like pole faces of the magnets mutually face across the permeable core and a third magnet pole face faces transversely relative to the mutually facing pole faces of the pair of magnets.

Abstract: Embodiments of the present disclosure relate to a motor and an industrial robot. The motor comprises a main body, an inner end cover, an outer end cover, a first oil seal, a second oil seal and an oil leakage sensor. The main body comprises a rotor extending along an axial direction. The inner end cover is coupled to the main body and comprises a first hole for the rotor to pass through. The outer end cover is arranged outside the inner end cover along the axial direction and abuts against the inner end cover. The outer end cover comprises a second hole for the rotor to pass through, wherein a first oil seal is arranged adjacent to the second hole and a second oil seal is arranged inside the first oil seal and is adjacent to the second hole. A gap is provided between the first oil seal and the second oil seal along the axial direction.