Electric motor has pole shoe heads, and poles with flat shapes that move relative to each other along closed path so overlap area increases non-linearly with displacement when shapes start to overlap

摘要

The device has a rotor (30) in a housing (12) with magnetic poles (104) arranged successively in the azimuthal direction relative to the axis and a stator (20) with stator units about the axis with at least one pole shoe head (66,68) facing at least one rotor plate (36,38). The pole shoe heads and poles have different flat shapes formed and movable relative to each other along a closed path so an overlap area increases non-linearly with displacement when the shapes start to overlap.