US12573903USUSPTO Grant XML

Switched reluctance motor manufacture with variable wire twist rate

An assembly for an electric motor includes a stator including a plurality of stator poles, each stator pole including a base end and a rotor end opposite the base end, and an electromagnetic coil around each stator pole. The coil around each stator pole includes at least two electrically conductive wires wound into multiple wire turns around the stator pole that extend from the base end of the stator pole to the rotor end of the stator pole. Wire turns of the coil closer to the rotor end of the stator pole are twisted and wire turns of the coil closer to the base end of the stator pole are not twisted.

Patent

Brief

Patent brief

Problem

How can vibration in electric motors and rotors be reduced?

Novelty

The coil around each stator pole includes at least two electrically conductive wires wound into multiple wire turns arou...

Uses

Patent review

Assignee

Caterpillar Inc.

Published

Mar 10, 2026

Inventors

Carlos E. Nino Baron, Yash Bharat Bhatia, Bradford Allyn Kough, Andrew A. Friebohle

Domain

Electromechanical systems

Plain-English summary

Problem

How can vibration in electric motors and rotors be reduced?

Solution

assembly for an electric motor includes a stator including a plurality of stator poles, each stator pole including a base end and a rotor end opposite the base end, and an electromagnetic coil around each stator pole.

Key novelty

The coil around each stator pole includes at least two electrically conductive wires wound into multiple wire turns around the stator pole that extend from the base end of the stator pole to the rotor end of the stator pole.

Applications

Patent review

Relevant search intents

c3a35ca75b75

Claims preview

1 . An assembly for an electric motor, the assembly comprising: a stator including a plurality of stator poles, wherein a stator pole includes a length extending from a base end of the stator to a rotor end of the stator opposite the base end; and an electromagnetic coil around each stator pole, the coil around each stator pole including: at least two electrically conductive wires wound into multiple wire turns around the stator pole that extend between the base end of the stator pole to the rotor end of the stator pole; wherein wires of wire turns of the coil closer to the rotor end of the stator pole are each separately twisted to individually include at least one half twist per wire turn of the wire, and wires of wire turns of the coil closer to the base end of the stator pole are not twisted; and wherein the coil includes multiple twisted wire turns per length of the stator and the number of multiple twisted wire turns per length decreases along the stator length from the base end of the stator pole to the rotor end of the stator pole to taper the number of twisted wire turns at the rotor end. 2 . The assembly of claim 1 , wherein the wires of wire turns of the coil closer to the rotor end of the stator pole include one twist per turn and the wires of wire turns of the coil closer to the base end of the stator pole include zero twists per turn. 3 . The assembly of claim 1 , wherein turns of the wires of the coil closer to the rotor end of the stator pole include a number of twists per turn that is in a range of one-half twist per turn to two twists per turn, and turns of the wires of the coil closer to the base end of the stator pole include zero twists per turn.

Switched reluctance motor manufacture with variable wire twist rate

Plain-English summary

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