Patent ID: 7737597

Claim:
A toothed module assembly for a primary part of a permanent-magnet synchronous motor having at least one secondary part which has at least one section free of permanent magnets and is constructed from a structure made of iron with successive teeth pointing towards the primary part, wherein an air gap is established between the primary part and the secondary part, and wherein the secondary part and the primary part are movable relative to one another in a movement direction, said toothed module assembly comprising: a first toothed module including a permanent magnet extending in a direction perpendicular to the air gap and having opposing major surfaces, iron webs extending in the direction perpendicular to the air gap and projecting substantially perpendicular from each of the opposing major surfaces of the permanent magnet, with an iron web on one major surface forming a cutout with an adjacent iron web located on the same major surface, said cutout being aligned in the movement direction with a web located on the opposing major surface, a coil encompassing a laminate formed of the corresponding webs and the permanent magnet, said permanent magnet protruding from the coil at least at an air-gap-distal end of the coil in the direction perpendicular to the air gap, wherein a width of the laminate inside the coil is smaller than a width of the laminate outside the coil, and a second toothed module of identical configuration as the first toothed module and placed adjacent to the first toothed module in such a way that the iron web on one side of the first toothed module engages in an air-gap-distal region of the first module with a cutout of an adjacently placed second toothed module in an air-gap-distal region of the second toothed module, to thereby allow the first and second toothed module to form an interdigitated toothed module assembly.