A motor includes a molded stator; a cooling fan assembled to an end of a shaft protruding from one end face of the molded stator; a fan cover that covers the cooling fan; a capacitor assembly box installed to the molded stator and having a capacitor incorporated therein; a foot plate installed to the molded stator; and a bracket provided on the other end side of the molded stator. The fan cover is formed with a latched to the capacitor assembly box and a claw latched to the foot plate; and holes and to which the claws are latched are formed on the capacitor assembly box and the foot plate, respectively.

A device for addition of motive force to a vehicle, with rotor-plate, rotor-arms, rotor permanent magnets, stator-plate, stator columns, stator electromagnets, and battery, cell, or other energy storage device. The device is retro-fittable on existing wheel assemblies, and installation coverts an internal combustion vehicle to a hybrid with electric propulsion.

A stacked core includes a plurality of core pieces that are arranged in a stack. Each of the core pieces has a plurality of magnet insertion holes. A bridge is provided between a radially-outer end of each of the magnet insertion holes and an outer region of each of the core pieces, A radially-outer contour of the bridge is provided on a radially-inner side of a blanking-contour line of each of the core pieces.

A rotor (10) of a motor includes a rotor core (11) and a plurality of magnets (14a, 14b) which are arranged at a circumferential surface of the rotor core or at the inside of the rotor core, the length of a magnet of the plurality of magnets in the axial direction of the rotor core determined in accordance with the residual magnetic flux density of the magnet. The axial direction length of the magnet is preferably determined by multiplying a reference axial direction length of the magnet with the residual magnetic flux density of the magnet and dividing this by a reference residual magnetic flux density of the magnet.

A rotor for an electric machine includes a rotor core having a plurality of rotor sheets (RS1), each of the plurality of rotor sheets including a plurality of flux guide sections, each of the plurality of flux guide sections having a plurality of flux paths and a plurality of flux barriers. The plurality of flux guide sections having a first flux guide section in which a first number of the plurality of flux barriers has a bridge interrupting the flux barrier, and a second flux guide section in which a second number of the plurality of flux barriers has a bridge interrupting the flux barrier. Each bridge is made of a material of high permeance, and the first number of the first flux guide section is different than the second number of the second flux guide section.

An assembly includes multiple adjoined rotor sections each having multiple poles and multiple void rows therethrough that are radially distributed in each of the poles. The rotor sections are skewed in a circumferential direction. The assembly also has multiple conductive rings that substantially surround one of the void rows. A method of assembly and electric machines and vehicles using the assembly are also disclosed. Aspects reduce torque ripple in electric machines and allow for encoderless/sensorless operation in an electric machine using the rotor assembly. 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.

A method for manufacturing a laminated core for a motor comprises the steps of: stamping a sheet of a core of a straight form to have a form that a plurality of split cores are connected; laminating sheets of the core perpendicularly; bending the sheets of the core in a round form; and forming a connection caulking part at contact parts of yokes, which are adjacent to each other, of the bended core.

A rotating electrical machine includes a supporting member, a stator core, a winding set, a shaft, a rotor, a magnetic generator, and a magnetic detector. The stator core has a ring-shaped yoke held inside the supporting member and tooth portions projecting from the yoke in a radial inward direction of the yoke. The winding set is wound on the tooth portions. The shaft extends through the stator core and is rotatably supported by the supporting member. The rotor is located in the stator core and rotates with the shaft. The magnetic generator is located at an end of the shaft. The magnetic detector outputs a signal indicative of a change in magnetic flux density created by the magnetic generator. The number of the tooth portions for every magnetic pole pair in the rotor is even.

In one embodiment, a permanent magnet rotor is provided. The permanent magnet rotor includes at least one permanent magnet and a substantially cylindrical rotor core including an outer edge and an inner edge defining a central opening. The rotor core includes a radius R, at least one pole, and at least one radial aperture extending radially though the rotor core from the outer edge to a predetermined depth less than the radius. The at least one radial aperture is configured to receive the at least one permanent magnet. The rotor further includes at least one protrusion extending into the at least one radial aperture, the at least one protrusion positioned substantially along a bottom of the at least one radial aperture and configured to facilitate retention of the at least one permanent magnet within the at least one radial aperture.

A method of manufacturing a rotor core having a plurality of core members stacked together includes determining weight imbalances for the plurality of core members with respect to a central axis of the rotor core; combining the weight imbalances of the plurality of core members to determine a weight distribution of the rotor core; and displacing the weight imbalances of one or more of the plurality of core members to adjust a position of the weight distribution of the rotor core with respect to the central axis.