Permanent magnet generator for vehicle - has air guide for cooling winding and laminar stator packet

摘要

The generator has a wound stator (7) and a rotor (101) mounted on a bearing plate (12) with ventilation holes (3). A tubular air guide (11) is concentric with the stator. The air guide is funnel-shaped and has its narrower end (111) near the bearing plate and its wider end (112) near the winding overhang (8). The bearing plate extends into the region of the stator. The narrower end of the air guide touches the bearing plate roughly in the middle of the stator. The distance between the air guide and that part of the stator facing the air guide and the winding overhang is roughly constant.