Arrangement with stator having teeth which define non-rectangular parallelogram or trapezoidal teeth which carry coils

摘要

Disclosed is an arrangement for an electric machine. The arrangement comprises: a stator (20) with teeth (21) defining grooves (24) there between carrying generally identical coils which close the grooves; and a movable, permanent magnetic rotor or armature, which is configured to move relative to the stator. The grooves have bottoms that are not perpendicular to the side walls of the grooves such that the grooves are generally non-rectangular parallelogram or trapezoidal in cross-section.