Internal stator of a rotary field machine having stator tooth groups each consisting of two directly adjacent teeth and a magnetic return

An internal stator of a rotating-field machine, the internal stator including:

• a number, N, N >2, of stator teeth which together form a number, N/2, of tooth groups, wherein each respective stator tooth has one pole core and one pole shoe integrally formed thereon, wherein the one pole core of the respective stator tooth is manufactured from a ferromagnetic first material, wherein each respective one of the N/2 tooth groups is formed by two directly adjacently arranged stator teeth which, together with a magnetic return, are constituent parts of a magnetic circuit, wherein either:
• adjacent tooth groups of the tooth groups are connected to one another via webs and the pole cores of the tooth groups are integral with the magnetic return, whereby the webs and the magnetic returns are composed of the first material, or
• the stator teeth are, by way of a respective end of the pole core of each respective one of the stator teeth that is disposed on an opposite side from the respective end of the pole core at which the pole shoe of the respective one of the stator teeth is disposed, fastened to a connecting element in the form of a ring;
• and
• at least one intermediate element arranged between two adjacent stator teeth of two adjacent tooth groups, wherein the at least one intermediate element extends in an axial direction of the stator and is manufactured from a second material that differs from the first material,
• wherein the webs or the connecting element has, in a region between stator teeth, a first radial width, and
• wherein the magnetic return connecting the stator teeth of a given tooth group to one another has a second radial width or the connecting element together with the magnetic return inserted between the stator teeth of a given tooth group together have the second radial width, wherein the first radial width is smaller than the second radial width.