Electric motor reducer for e.g. industrial field, has sectors including wide and narrow teeth, and notch with width greater than that of one narrow tooth, where one of sectors is lower than specific degree and regroups coils

摘要

The motor reducer has a polyphase electric motor comprising a stator (1) excited by electric coils (15-17), and a rotor (14) with magnetic poles. The stator has angular sectors (alpha1, alpha2) with respective radii (R1, R2) whose ratio is comprised between 1.2 and 2. The sectors comprise wide teeth (2-7) and narrow teeth (8-13) extending radially from an annular crown. The wide teeth have a width greater than or equal to twice the width of the narrow teeth. A notch has a width greater than that of one narrow tooth. The sector (alpha1) is lower than 220 degree and regroups the coils.