A rotor for an induction motor. The rotor includes a core, a pair of end rings, and a plurality of aluminum conducting members. The core includes a plurality of accommodating holes that are aligned circumferentially in a peripheral portion of the core. The accommodating holes extend from one end surface of the core to the other. The end rings are formed of aluminum alloy. Each of the end rings has a plurality of support holes corresponding to the accommodating holes. The support holes are aligned circumferentially in a peripheral portion of each end ring. The end rings are each disposed at a corresponding one of the opposing ends of the core such that the support holes are opposed to the accommodating holes. Each of the conducting members is received in a corresponding one of the accommodating holes and the associated support holes. Each conducting member is supported by each of the end rings at a support portion located in the corresponding support hole.
In accordance with one embodiment, the present technique provides a bushing that is configured to electrically and mechanically couple a conductor bar of a rotor assembly to an end ring of the rotor assembly. The exemplary bushing has an interior surface that is configured to abut against the conductor bar and an exterior surface that is configured to abut the perimetric surface of an end slot. Advantageously, the bushing, because of a good fit in the end slot and around the conductor bar, provides a good electrical connection between the conductor bar and the end ring. Moreover, the exemplary bushing also provides interferences fits that at least partially secure the end ring to the rotor core.
