Patent ID: 7705511
Filing Date: 2010-04-27
Classification: H02K

Abstract:
1. In a main element usable as a rotor or stator for an electrical machine, in particular for a small DC motor, having a magnetically conductive body, which has a short-circuit ring and radially protruding teeth formed integrally onto the short-circuit ring, which teeth are offset from one another about circumferential angles, the improvement wherein the body comprises a plurality of separately manufactured modules, placed axially aligned against one another, of which two modules are embodied identically and on being placed against one another are rotated counter to one another by 180° in the plane defined by the module axes, wherein the modules each have one annular short-circuit segment forming an axial portion of the short-circuit ring, and an equal number of module teeth offset by equal circumferential angles on the short-circuit segment and protruding axially unilaterally past the short-circuit segment which teeth, when the modules are put together form the teeth of the body, and wherein each module tooth has a tooth shaft that is rounded at the face end; and wherein there are intermediate modules, and the module teeth of the intermediate modules, the face ends of the tooth shafts that abut the module teeth of the outer modules have concave indentations which fit by positive engagement over the rounded portions on the face ends of the tooth shafts of the outer modules.