A cage for a wound rotor includes a first portion and a second portion to be rigidly connected to one another. Each portion includes an end ring and a circumferential plurality of rods extending away from the end ring parallel to the axis of revolution of the end ring. Each rod has a main portion and an end portion. For each rod of the first portion, the end portion of the rod is shaped to be rigidly connected to the end portion of at least one complementary rod of the second portion when the two portions are each installed at a longitudinal end of the body of the rotor so that the two complementary rods rigidly connected form a slot wedge extending between the two end rings of the two portions of the cage.

A cage for a wound rotor includes a first portion and a second portion to be rigidly connected to one another. Each portion includes an end ring and a circumferential plurality of rods extending away from the end ring parallel to the axis of revolution of the end ring. Each rod has a main portion and an end portion. For each rod of the first portion, the end portion of the rod is shaped to be rigidly connected to the end portion of at least one complementary rod of the second portion when the two portions are each installed at a longitudinal end of the body of the rotor so that the two complementary rods rigidly connected form a slot wedge extending between the two end rings of the two portions of the cage.

Provided is a rotor for an asynchronous rotating electrical machine that includes a cylindrical magnetic mass, two short-circuit disks, a non-through shaft that includes two half-shafts tightly holding the cylindrical magnetic mass and the two short-circuit disks each sandwiched between the half-shafts and one of the ends of the magnetic mass, and conducting bars housed inside the magnetic mass and distributed uniformly along at least one diameter of the magnetic mass such that the short-circuit disks and the conducting bars form a squirrel cage, and the half-shafts, the short-circuit disks and the magnetic mass form a gas-tight envelope.

Provided is a rotor for an asynchronous rotating electrical machine that includes a cylindrical magnetic mass, two short-circuit disks, a non-through shaft that includes two half-shafts tightly holding the cylindrical magnetic mass and the two short-circuit disks each sandwiched between the half-shafts and one of the ends of the magnetic mass, and conducting bars housed inside the magnetic mass and distributed uniformly along at least one diameter of the magnetic mass such that the short-circuit disks and the conducting bars form a squirrel cage, and the half-shafts, the short-circuit disks and the magnetic mass form a gas-tight envelope.

Disclosed are various embodiments for an induction machine having a rotor comprising a plurality of rotor core assemblies configured to form a toroidal magnetic torque tunnel having at least a first inductive tunnel segment and a second inductive tunnel segment and a stator having a plurality of coils configured to form a coil winding assembly, the coil winding assembly positioned within the toroidal magnetic torque tunnel, such that at least one of the plurality of coils is surrounded by the first inductive tunnel segment or the second inductive tunnel segment, alternatively the rotor may be the coil winding assembly and the stator may be the toroidal magnetic torque tunnel.

A fluid-cooled rotor for an electric machine and an asynchronous machine with a rotor winding cooled directly or close to a loss.

A rotor shaft for a high speed motor that has a coating that is secured to a shaft body. The coating and the shaft body are formed from dissimilar materials. More specifically, the coating may be an alloy material, such as, for example, a copper alloy, while the shaft body may be a steel material. According to certain embodiments, the alloy material of the coating may be secured to at least a portion of a rotor body blank in a solution treated condition via a low temperature welding procedure. Additionally, the coating may be hardened, such as for example, through the use of an age hardening process. The coating and the rotor body blank may be machined together to form the rotor shaft. According to certain embodiments, such machining may configure the rotor shaft for use with a turbo-compressor that is configured for air compression.

A stator core, a coil, and a receiving member are included. The coil is attached to the stator core and secured by an impregnant and includes a coil end extending from an end face of the stator core in an axial direction outward in the axial direction. The receiving member having an annular shape is fixed to the end face of the stator core so as to be disposed on a farther outer side than the coil end in a radial direction of the stator core. The receiving member has an outer diameter wa smaller than an outer diameter of the stator core and has a height ha along the axial direction smaller than a height of the coil end.

A stator core, a coil, and a receiving member are included. The coil is attached to the stator core and secured by an impregnant and includes a coil end extending from an end face of the stator core in an axial direction outward in the axial direction. The receiving member having an annular shape is fixed to the end face of the stator core so as to be disposed on a farther outer side than the coil end in a radial direction of the stator core. The receiving member has an outer diameter wa smaller than an outer diameter of the stator core and has a height ha along the axial direction smaller than a height of the coil end.

A rotor of rotary electric machines includes a rotor core which include first and second core blocks. The first core block is formed by stacking the steel plates in a state where the steel plates are engaged by a first crimping portion and skewed in a first direction in a circumferential direction. The second core block is formed by stacking the steel plates in a state where the steel plates are engaged by a second crimping portion and skewed in a second direction facing the first direction. The first and second core blocks are connected in an axial direction in the rotor core. A hole for inserting the first crimping portion is provided in an intermediate steel plate which is part of the annular steel plates. This intermediate steel plate is provided at a block boundary position of the second core bock and is connected to the first core block.