Electric motor or generator

摘要

The electric motor has a rotor (3), which has a rotor magnet. A stator (2) surrounds the rotor. The stator has a stator groove (20) confined in a stator tooth (21). A part of the stator groove is provided as medium for flow through an opening (4). The stator groove has windings. The stator tooth is wide inside, and is bent in an axial direction (30).