Internal cooling circuit system for rotating type electric machine e.g. electric motor, has dual-fan that drives stator cooling channel flow, and twisting unit that is provided at short-circuit ring of rotor

摘要

The internal cooling circuit system has an indoor fan (23) that is designed as a dual fan (25). Two different flow channels (1,2) are driven by the indoor fan. A main flow (15) is passed into winding space (14) in stator cooling ducts (12) through rotor cooling channels (5) of flow channel (1). A secondary flow (16) is passed into winding space in stator cooling ducts through an air gap (9) between the rotor (3) and stand (10) in flow channel (2). The stator cooling channel flow (17) is driven by dual-fan. A twisting unit (8) is provided at short-circuit ring (7) of rotor.