A motor housing includes a core and a shell having an annular body. The annular body is configured to secure a stator of a motor therein. The annular body includes first and second ends defining first and second openings, respectively. The annular body defines a slot extending along a length of the annular body. The slot is coterminous with the first opening. The core is configured to be in registration with the shell. The core is configured to rotatably support a rotating assembly of the motor including an output shaft. The core includes a base portion, an annular ring, and a guide arm interconnecting the base portion and the annular ring. The core is in registration with the shell when the guide arm is received in the slot of the annular body of the shell to form an interlocking structure.

A wedge for use in an electric machine includes a central portion comprising at least a first material, a first wing integrally attached to the central portion, and a second wing integrally attached to the central portion opposite the first wing, wherein the first wing, and the second wing include a second material.

A method for generating electrical power may include the steps of rotating a rotor of a generator at a speed in excess of about 12,000 revolutions per minute (rpm) to about 25,000 rpm and producing power with the generator at a rate in excess of about 800 kilowatts (kW). The generator has a power/weight ratio no smaller than about 3 kW/lbs. A rotor is cooled with cooling oil internally circulated through the rotor of the generator so that contact of cooling oil with external surfaces of the rotor may be precluded. The stator is also cooled with oil that is prevented from contacting the external surfaces of the rotor. Pressurized airflow may be produced in a gap between the rotor and a stator of the generator to preclude entry of cooling oil into the gap.

A rotary electric machine includes a cylindrical stator core on which a coil is mounted, and a case to which the stator core is fastened via a fastening member. An insertion portion which penetrates the stator core in an axial direction of the stator core and through which the fastening member is inserted is formed in the stator core, a longitudinal direction of the insertion portion being along a radial direction of the stator core.

A magnetic interaction system between rotors for the production and storage of kinetic energy having a primary rotor mechanically adapted to at least one platform by a rotation axis, the primary rotor having a first set of magnets; and at least three secondary rotors, mechanically adapted to the at least one platform by independent rotation axes equidistant from the rotation axis of the primary rotor; characterized in that each of the at least three secondary rotors has at least two overlapping platforms over the same rotation axis, and on which a second set of magnets are adapted.

A rotor for an electrical machine is provided. The rotor comprises: a rotor body; one or more magnets arranged around the rotor body; and a non-magnetic containment sleeve positioned radially outwardly of the one or more magnets. The containment sleeve has axially-alternating solid ring sections and reticulated ring sections.

Electrical machine apparatus comprising: a rotor having a longitudinal axis and being arranged to rotate about the longitudinal axis in a first circumferential direction, the rotor defining one or more conduits for receiving fluid therein, the one or more conduits including an inlet and an outlet; and a fluid guide defining a first aperture arranged to direct fluid in a second direction towards the rotor, the second direction having a positive circumferential component in the first circumferential direction.

An insulation structure applied to each of two ends of a stator in an axial direction to block an electric field of an end coil assembly from being applied to a motor shaft. The structure includes: a conducting part extending in a predetermined induction direction parallel to a direction in which the end coil assembly is pulled out from the stator; and an insulating part positioned between the conducting part and the end coil assembly to insulate the conducting part.

A system is provided for liquid cooling of an electric motor generator unit. The electric motor generator unit includes a magnetic air gap running between a stator and a rotor, wherein for the cooling of the electric motor generator unit, the air gap is acted on with cooling liquid supplied from the outside. A control device adapts the pressure or the volume flow of the supplied cooling liquid as a function of a determined actual value of an operating temperature variable of the electric motor generator unit.

In one embodiment, a generator or an alternating current (AC) motor includes a stator and a rotor. The rotor is configured to rotate at least partially within the stator or around the stator and is separated from the stator by a gap having a partial vacuum. The rotor includes a shaft configured to permit a flow of coolant and a plurality of microchannels formed within the rotor. The microchannels are fluidly coupled to the shaft and are configured to permit the coolant to pass from the shaft through at least a portion of the rotor in order to provide cooling for the rotor.