Ventilation circuits applied to cylindrical rotor synchronous machines

June 12th, 2014, Published in Articles: Vector


The main ventilation arrangements for cylindrical rotors in synchronous machines to dissipate heat from the stator and rotor windings.

Cylindrical rotor synchronous machines are characterised by their rugged pole design. The poles are built flush with the rotor surface and their windings lie in slots in the rotor periphery, and are also called non-salient pole type rotors.

Similar to the stator core lamination, the cylindrical rotor consists of steel laminations provided with radial ventilation channels to improve heat dissipation from rotor lamination core and field windings.


These construction characteristics provide evenly distributed temperature along the core laminations and ensure a larger contact area of the core lamination faces with the air, so enlarging the heat transfer area between the field winding and the cooling air.

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