FIELD: electricity.
SUBSTANCE: electric machine (12) comprises stator (16), rotor (18) and shaft (20) coupled mechanically to rotor (18). At that shaft (20) contains cavity (22), wherein at certain areas there is cooling device (26). Shaft (20) is designed to rotate around cooling device (26). At that cooling device (26) is placed in cavity (22) with formed air gap (28).
EFFECT: improved cooling efficiency for the shaft.
10 cl, 1 dwg
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