Electric motor, in particular a small motor

Claim 1

In an electric motor, particularly a small motor, having an armature including an armature core (10) defining an axial length (l A ), and an armature winding (11) on the core, a field magnet structure having at least two permanent field magnets (12) facing the armature, the permanent magnets having an axial length (l M ) greater than the axial length of the armature core and protruding axially beyond the armature core at both ends; each magnet including at least a first section (13) of a highly remanent magnetic material (1) having a portion extending in axial direction over the armature core, and at least one second section (14) of a highly coercive magnetic material (2) disposed at least at one circumferential end portion of the magnet, wherein the highly remanent magnetic material (1) has a higher remanence in comparison to the highly coercive magnetic material (2), but a lower limiting coercive field strength, wherein the at least one second section (14) of highly coercive magnetic material (12) extends over essentially only the axial length (l A ) of the armature core (10); the first section of highly remanent magnetic material includes two protruding portions (16) adjoining the second section (14) at both axial ends of the second section, said protruding portions protruding beyond the axial dimension of the armature core (10); and said protruding poritons (16) of the first section (13) of highly remanent magnetic material are unitary with said portion extending in axial direction over the armature core (10).