ELECTRICAL MACHINE STATOR ASSEMBLY.

摘要

An electrical machine such as a motor has a stator on which toroidal coils are mounted on a segmented backiron. The segments overlap to produce a graded magnetic flux at the joint between two segments, and the number of segments and the position of the joints with respect to the phases of the machine coils and the poles of the rotor are such that the flux joints are distributed evenly across the phases and the poles while allowing assembly of the machine backiron with the coils mounted on the segments. This results in a motor with no sudden flux changes in the stator and therefore reduced cogging and incipient noise.