Abstract: A rotor that includes a permanent magnet; and a rotor core that has a magnet placement hole in which the permanent magnet is disposed, wherein the stress relaxation magnetic flux suppression hole is formed such that a total width of a minimum width of a first magnetic flux passage between a portion of the stress relaxation magnetic flux suppression hole on a first side in the longitudinal direction and the magnet placement hole and a minimum width of a second magnetic flux passage between a portion of the stress relaxation magnetic flux suppression hole on a second side in the longitudinal direction and the magnet placement hole is less than a total length of a length of the first magnetic flux passage in the longitudinal direction and a length of the second magnetic flux passage in the longitudinal direction.

Abstract: The hole diameter of a shaft through hole formed in the rotor core is changed in the axial direction, thereby forming a concave portion whose hole diameter is large and a convex portion whose hole diameter is small in the inner circumferential surface of the shaft through hole; the convex portion is arranged at opening portions on both ends of the shaft through hole; a shaft having ridge-shaped convex portions on a press-fitting portion is press-fitted into the shaft through hole to assemble; the number of points of the concave portion is equal to or more than two; and respective diameter dimensions of the concave portion, the convex portion, and the shaft are set to be the diameter of a main body of the shaft<the diameter of the convex portion<the diameter of ridge-shaped convex portions of the shaft<the diameter of the concave portion.

Abstract: A motor rotor assembly that includes multiple motor rotor sections and a rotor bar that extends through the motor rotor sections, such that the rotor bar and the motor rotor sections are configured such that the rotor sections are step-skewed, or continuously skewed, from each other. The assembly may be used in an IPM or Synchronous Reluctance motor; and, the motor rotor sections may be of solid core or laminations. Various assembly components, IPM and Synchronous Reluctance motors, and methods of construction/assembly are also disclosed. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.

Abstract: A component that includes a longitudinal axle, having a multiple keybars that extend outward from a surface of the axle, such that each of the keybars are disposed axially along and circumferentially around the axle. Also the axis of the keybars is parallel to the axle, such that a profile of all midpoints of the keybars is helicoidal around the axle, also the helicoidal profile is such that they make up one or more helicoidal paths. The profile may be herringbone skewed. The component may be part of a rotor assembly that is part of an electric machine such as an interior permanent magnet (IPM) or Synchronous Reluctance motor.

Abstract: Provided is a rotor core of a motor, the rotor core, the rotor core including: a thin disk-shaped rotor core member; a shaft hole penetratively formed in a center of the rotor core member; a shaft press-fitted into the shaft hole; a plurality of magnet insertion holes penetratively formed at a position near to a periphery of the rotor core member for inserted coupling by a magnet; a plurality of teeth protrusively formed at an inner circumferential surface of the shaft hole, and a skived portion protrusively formed at a position corresponding to the plurality of teeth of the shaft, wherein the rotor core members are stacked each at a predetermined height, and the shaft is press-fitted into the shaft hole.

Abstract: A rotor structure of a drive motor is provided. In the rotor structure of a driving motor, a rotor core is divisionally formed in a plurality of core blocks and the core blocks may be combined around an outer side of a rotary shaft.

Abstract: In a rotary electric machine having a rotor core of a skew structure, when one of the core blocks is sequentially stacked on the other of the core blocks to form a step skew, a communication reference groove is formed along an axial direction of the rotor core by aligning a side section of a short protruding section in one core block with a side section of the long protruding sections in the other core block, and by aligning a side section of a long protruding section in one core block with a side section of a short protruding section in the other core block. The core blocks are correctly stacked by aligning the side section of the long protruding sections with the side section of the short protruding sections.

Abstract: A rotor structure for a rotary machine in which a rotor (10) is securely fastened to the outer periphery of a shaft (20) and a positioning key is formed on the inner wall of the rotor (10), while a key (11) is formed on the outer periphery of the shaft (20), wherein curved sections (R) are formed on the side surfaces on both sides of the positioning key (11), thereby reducing stress at the angled sections of the rotor core to a greater extent than positioning keys of the prior art. At the same time, torque can be transmitted over the entire surface of an interference section of the shaft (20) thereby enabling torque to be reliably transmitted, and a magnetic path of a magnetic protrusion (d-axis) to be ensured. A motor can thus be reduced in size.

Abstract: According to the present invention, in a rotor of an electric motor including a rotational shaft and a yoke fitted on an outer circumferential surface of the rotational shaft, fitting between an inner circumferential surface of the yoke and the outer circumferential surface of the rotational shaft is interference fit. Further, fitting between a convex portion (or concave portion) formed on the outer circumferential surface of the rotational shaft and a concave portion (or convex portion) formed on the inner circumferential surface of the yoke is also interference fit.

Abstract: An electric pump for supplying a hydrogen gas to a fuel cell includes a rotary shaft rotatably inserted through an electric motor, a transmitting member provided on one of an outer peripheral surface of the rotary shaft and an inner peripheral surface of the electric motor so as to be rotatable therewith, and a groove formed in the other of the outer peripheral surface of the rotary shaft and the inner peripheral surface of the electric motor for the transmitting member to be inserted therein. The groove transmits a rotary torque of the electric motor to the rotary shaft by contacting an inner surface of the groove and the transmitting member and has an opening width along a rotary direction of the rotary shaft which is larger than the width of the transmitting member. The groove and the transmitting member produce an impact torque when the electric pump is started.

Abstract: Provided is a stacked rotor core of a motor, the rotor core including a thin disk-shaped rotor core member including a shaft hole extended to a direction of a rotation shaft, a key groove communicating with the shaft hole and a magnet, a shaft press-fitted into the shaft hole and concavely formed at a peripheral position corresponding to that of the key groove with a key accommodation groove, and at least one or more keys formed at the key groove and the key accommodation groove to restrict the rotor core member and the shaft.

Abstract: A motor is disclosed, the motor including a stator core formed with a cylindrical space at an inner surface and formed at an inner circumferential surface with a plurality of teeth protruding toward a center, a cylindrical rotor rotatably mounted at the space and formed with a plurality of pockets for inserting a permanent magnet, a rotation shaft coupled to the center of the rotor and receiving a rotation force generated by interaction between the stator core and the rotor, a nut member connecting the rotor to the rotation shaft by press-fitting the rotor at a periphery to an axial direction of the rotation shaft and press-fitting the rotation shaft at an inner circumferential surface to the axial direction of the rotation shaft, and a key unit inhibiting a slip between the rotor and the nut member.

Abstract: A rotating electrical machine is presented and includes a rotor, rotatable about an axis and is surrounded concentrically by a stator and has a hollow cylindrical rotor laminated core, which includes a layered lamination stack made up of a multiplicity of ring-section-shaped lamination segments which are acted upon by a pressing plate in order to distribute the pressure and are clamped by bolts which pass in an axial direction through the rotor laminated core, and which engages with a concentric central body of the rotor by means of axial slots on the internal radius of the rotor laminated core in order to transmit torque. The machine also includes slots formed in each case by pairs of radially inwardly aligned cams which are arranged on the internal radius of the lamination segments and are separated from one another by the width of the slot.

Abstract: A rotor comprising: a rotating shaft with at least one keyway formed at an outer circumferential surface thereof and ranging along an axial direction; and a rotor core that includes a key that projects out on an inner circumferential side thereof, and is fitted in the keyway; wherein: a recessed portion that widens outward along a radial direction is formed at each of two sides of the key facing opposite each other along a circumferential direction at the rotor core; a planar portion is formed at a bottom area of the recessed portion so as to lessen stress occurring on each of the two sides of the key facing opposite each other along the circumferential direction; the planar portion is a straight contoured portion extending over a predetermined length along a direction perpendicular to a direction in which the key projects out, and a connecting side surface extending to an inner circumference of the rotor core is formed continuously to an end of the straight contoured portion located on a side opposite from a

Abstract: A rotor is provided with a rotor core, a shaft fastening hole provided at the center of the rotor core, and magnets provided to the outer circumferential portion of the rotor core. Circular arc slits are formed at intervals on double concentric circles, respectively, so as to be located around the shaft fastening hole of the rotor core. The slits are arranged in such a manner that the outside slits on the outer circle are each located so as to block the portions located in the intervals between adjacent inside slits on the inner circle.

Abstract: An electric motor comprises a rotor hub defining a first slot and a rotor stack defining a second slot. A rotor key has a shape corresponding to the cross-sectional shape of the first slot such that the rotor key is removably retained within the first slot. The rotor key is inserted into the first slot on the rotor hub and the second slot on the rotor stack.

Abstract: Disclosed is a washing machine which includes a tub which holds laundry, a drum which is disposed in and rotates within the tub, a stator which is fixed to the tub, and a rotor which is fixed to the drum. The rotor includes a frame, a bushing installed on the frame, a motor shaft having an end which is inserted in and fixed to the bushing, a bearing interposed between the motor shaft and the tub, and at least one guide disposed between the motor shaft and the bushing at an end of the bushing.

Abstract: A brushless motor has a stator, a rotor rotatably disposed in an inner circumferential portion of the stator, and a resolver configured to detect a rotational position of the rotor with respect to the stator. The resolver has a resolver stator disposed at a fixed circumferential position with respect to the stator, and a resolver rotor disposed at a fixed circumferential position with respect to the rotor.

Abstract: A motor for a treadmill, containing at least a housing (1), a stator (2), a rotor (3) having a rotating shaft (4), a front end cover (9), a rear end cover (5), and a flywheel (13). The front end cover (9) and the rear end cover (5) are disposed on both ends of the housing (1), respectively. The stator (2) and the rotor (3) are disposed in the housing (1). A front end of the rotating shaft (4) extends from the housing (1). The flywheel (13) is disposed on the front end of the rotating shaft (4). The rotating shaft (4) is connected to the flywheel (13) via key (14). A sleeve (12) is fit on the front end of the rotating shaft (4). The sleeve (12) abuts against the flywheel (13). A locking device is disposed at the end of the rotating shaft (4) and tightly fixes the flywheel (13).

Abstract: A rotor for an electric machine having a number of poles includes a shaft that extends along a portion of an axis and defines an outer surface. A first core portion is formed as a single inseparable component and includes a first portion that extends from the outer surface to a first outside diameter to define a first thickness, and a second portion spaced axially from the first portion that includes a reduced back portion that extends from an inside diameter to the first outside diameter to define a second thickness that is less than the first thickness. A second core portion is connected to the first core portion and includes a second outside diameter that is substantially the same as the first outside diameter.

Abstract: A retention system in which rotor pole pieces are retained within complementarily shaped channels in a rotor hub, permanent magnets are secured between the pole pieces and within clamp members, and wedge-shaped pieces are used to apply positive locking forces along the axial length of each clamp member and of adjacent pole pieces. A curable resin preferably in disposed within gaps between the permanent magnets and the clamp members.

Abstract: A rotor assembly for mounting a rotor to a motor shaft having a rotor with a centrally positioned central bore, the diameter of which is slightly larger than a diameter of the motor shaft, a first stepped bore intersecting the central bore and being aligned along a first axis of the rotor, and a second stepped bore also intersecting the central bore and being aligned along a second axis of the rotor. A first cam fastener is disposed within the first stepped bore, and a second cam fastener is disposed within the second stepped bore. Upon rotating the first and second cam fasteners, they engage the motor shaft thereby securely clamping the rotor to the motor shaft.