Permanent magnet excited electric machine has rotor with shaft and stator with associated stator winding, where internal cooling circuit is arranged within rotor

摘要

The permanent magnet excited electric machine (1) has a rotor (2) with a shaft (3) and a stator (4) with an associated stator winding (5), where an internal cooling circuit is arranged within the rotor. The internal cooling circuit is open towards the outside. An air inlet opening (14) is provided in the stator housing and an additional air inlet opening (7) is provided for the internal cooling circuit in a bearing shield (6).