Rotors and stators for use in electric machines and methods for refurbishing the same. One method for refurbishing a stator for use in an electric machine includes at least partially disassembling the stator to provide access to a plurality of stator windings connected in a four-circuit delta connection having three and four turns per coil, and reconfiguring the stator such that the plurality of stator windings are connected in an eight-circuit delta connection having seven turns per coil. One method for refurbishing a rotor for use in an electric machine includes at least partially disassembling the rotor to provide access to a rotor core, the rotor core including first rotor bars, and reconfiguring the rotor core to include second rotor bars that are longer than the first rotor bars.

Rotors and stators for use in electric machines and methods for refurbishing the same. One method for refurbishing a stator for use in an electric machine includes at least partially disassembling the stator to provide access to a plurality of stator windings connected in a four-circuit delta connection having three and four turns per coil, and reconfiguring the stator such that the plurality of stator windings are connected in an eight-circuit delta connection having seven turns per coil. One method for refurbishing a rotor for use in an electric machine includes at least partially disassembling the rotor to provide access to a rotor core, the rotor core including first rotor bars, and reconfiguring the rotor core to include second rotor bars that are longer than the first rotor bars.

An induction rotor assembly is provided. The induction rotor assembly includes a laminated stack, a plurality of foils, a plurality of conductor bars, a first end ring, and a second end ring. The laminated stack includes a body with an outer circumferential surface with a plurality of grooves extending from the first end to the second end. Each one of the plurality of foils is disposed within one of the grooves. Each of the foils is disposed between each of the conductor bars and each of the grooves. Each of the plurality of conductor bars includes a first conductor end and a second conductor end. The first end ring mates with a surface of each first conductor end. The second end ring mates with a surface of each second conductor end, and the plurality of conductor bars extends between the first end ring and the second end ring.

An induction rotor assembly is provided. The induction rotor assembly includes a laminated stack, a plurality of foils, a plurality of conductor bars, a first end ring, and a second end ring. The laminated stack includes a body with an outer circumferential surface with a plurality of grooves extending from the first end to the second end. Each one of the plurality of foils is disposed within one of the grooves. Each of the foils is disposed between each of the conductor bars and each of the grooves. Each of the plurality of conductor bars includes a first conductor end and a second conductor end. The first end ring mates with a surface of each first conductor end. The second end ring mates with a surface of each second conductor end, and the plurality of conductor bars extends between the first end ring and the second end ring.

A rotor of a rotary dynamoelectric machine incudes a magnetically conductive body, having substantially axially running slots distributed around the circumference. A squirrel cage includes electrical conductors which are arranged in the slots. The electrical conductors are electrically contacted at the two end faces of the rotor by short-circuit rings. The magnetically conductive body includes a base body and at least two further additional bodies, which axially adjoin the base body. A first one of the at least two additional bodies directly axially adjoins the end face of the base body, and a second one of the at least two additional bodies and optionally any further additional body axially adjoin the first additional body. The slots have radially exposed slot portions in the axial end regions of the rotor such that the conductors can be moved radially outward.

A rotor of a rotary dynamoelectric machine incudes a magnetically conductive body, having substantially axially running slots distributed around the circumference. A squirrel cage includes electrical conductors which are arranged in the slots. The electrical conductors are electrically contacted at the two end faces of the rotor by short-circuit rings. The magnetically conductive body includes a base body and at least two further additional bodies, which axially adjoin the base body. A first one of the at least two additional bodies directly axially adjoins the end face of the base body, and a second one of the at least two additional bodies and optionally any further additional body axially adjoin the first additional body. The slots have radially exposed slot portions in the axial end regions of the rotor such that the conductors can be moved radially outward.