A motor component prepared by electrolyzing copper and a motor includes an iron core, guide bars, and end rings, wherein the guide bars are arranged in grooves on an outer circumference of the iron core, respectively, and the end rings are located at both ends of the iron core to connect the guide bars in short, the guide bars and the end rings together form an integral squirrel cage, and the guide bars and the end rings are made by a copper electrolyzing method. Thus, manufacturing processes of melting and casting refined copper are omitted, thereby lowering a requirement for energy efficiency of manufacturing process of a motor and achieving energy saving in the manufacturing process; there is no welding process, thereby avoiding welding points resulted from copper welding and improving the reliability of the motor component.

Electric motors having variable poles are disclosed herein. In one aspect, an electric motor includes a stator including a plurality of magnetic conductive wires. The magnetic conductive wires are configured to form a plurality of poles. The electric motor further includes a rotor configured to rotate in response to a magnetic field generated by the poles of the stator and an electronic control module electrically coupled to the magnetic conductive wires. The electronic control module is configured to adjust a configuration of the poles of the stator.

A rotor of an induction motor includes a shaft, a ferromagnetic rotor core, first and second inductors axially bracketing the rotor core, and a rotor cage. The shaft extends along a stator axis, and the rotor core is disposed coaxially about the shaft. The rotor cage comprises first and second supports, and a plurality of cage bars. The supports are disposed axially between the rotor core and the first and second inductors, respectively. The cage bars surround the shaft, pass through the rotor core, are secured at the first and second supports, and are each electrically connected to both the first and second inductors.

A motor, including: a rotational shaft, a rotor, a stator, a housing, a first end cover, and a second end cover. The first end cover includes: a cover body including a bottom surface and a top surface, a bearing cavity, and a plurality of first bosses. The rotor is mounted on the rotational shaft; the stator is nested and installed inside the housing. The rotor is nested inside the stator; the first end cover and the second end cover are disposed on a rear end and a front end of the housing, respectively. The bearing cavity is disposed in the middle of the bottom surface of the cover body. The first bosses are circumferentially disposed at intervals on the top surface of the cover body. Outer side surfaces of the first bosses are located on a circle having a circle center coincident with the center of the cover body.

A method of manufacturing an induction motor rotor assembly, the method includes the steps of: providing a rotor; machining a plurality of re-entrant slots axially along an outer surface of the rotor; positioning a sleeve concentrically over the outer surface of the rotor; applying a friction stir welding process to the sleeve along each re-entrant slot axially along the outer surface of the rotor to cause the sleeve material to plasticise and flow into the axial re-entrant slot to form an axial re-entrant slot bar; and providing an electrical connection at each of the opposing axial ends of the rotor between respective ones of opposing ends of each of the axial re-entrant slot bars to thereby form the induction motor rotor.

Rotor of a rotary electric machine, comprising a body having two opposite lateral surfaces and a surface of revolution, two short-circuiting rings disposed in contact with each lateral surface of the body, and conductors disposed in slots formed on the surface of revolution of the body and each connected to the short-circuiting rings, characterised in that each conductor comprises at least one shoulder aligned with a lateral surface of the body.

A method for synchronizing a high inertial load with a line-start synchronous motor involves providing a rotor core with rotor bars being formed of a highly conductive material. In accordance with one aspect of the method, a user is directed to operatively couple a load to the motor and drive the load from start to at least near synchronous speed during steady state operation of the motor with the load coupled thereto. The load has an inertia that is greater than an inertia associated with a load driven by a like motor subjected to an equivalent range of starting current but having rotor bars formed from a conductive material having a conductivity lower than that the highly conductive material.

A rotor of an induction motor includes a shaft, a ferromagnetic rotor core, first and second inductors axially bracketing the rotor core, and a rotor cage. The shaft extends along a stator axis, and the rotor core is disposed coaxially about the shaft. The rotor cage comprises first and second supports, and a plurality of cage bars. The supports are disposed axially between the rotor core and the first and second inductors, respectively. The cage bars surround the shaft, pass through the rotor core, are secured at the first and second supports, and are each electrically connected to both the first and second inductors.

A rotor includes a shorting ring defining a plurality of cavities therein, and a plurality of conductor bars each integral with the shorting ring and having an end disposed within a respective one of the plurality of cavities. The shorting ring and each of the conductor bars are formed from an aluminum alloy including a lanthanoid present in an amount of from about 0.1 part by weight to about 0.5 parts by weight based on 100 parts by weight of the aluminum alloy. An aluminum alloy, and a method of forming a rotor are also disclosed.

An induction rotor assembly includes a laminated stack, conductor bars, a first end ring, and a second end ring. The laminated stack includes a body with a first end, an opposing second end, and an outer circumferential surface extending from the first end to the second end along a longitudinal axis. The conductor bars are disposed within grooves in the outer circumferential surface. Each conductor bar includes a first conductor end and a second conductor end extending beyond the ends of the laminated stack. The first conductor end and the second conductor end of each of the conductor bars includes a serrated surface having serrations. The first end ring and second end ring interlock with the serrated surface of the conductor ends. The conductor bars extend between the first end ring and the second end ring.