| 摘要 |
The invention relates to an axial flux induction electrical machine comprising a frame, a shaft ( 1 ) bearing-mounted to the frame, a disc-like rotor ( 2 ) supported to the shaft, a stator ( 4 ) comprising a stator winding ( 3 ) and supported by the frame on the first side of the rotor in axial direction. The disc-like rotor ( 2 ) comprises a non-ferromagnetic rotor frame ( 8 ) fabricated of a material with high electrical conductivity and comprising a uniform inner periphery ( 9 ) and an outer periphery ( 10 ) and conductor bars ( 11 ) fabricated of the same material and galvanically connecting the peripheries ( 11 ), the conductor bars together with the inner and outer peripheries forming in addition to the rotor frame also the cage winding of the rotor. In addition, between the inner periphery and the outer periphery there is a plurality of ferromagnetic pieces ( 12 ) extending through the frame plate and being spaced apart from each other at an appropriate distance so that the radial conductor bars are appropriately located between the pieces. According to the invention, the disc-like rotor frame ( 8 ) comprises at least one circular plate machined of work-hardened metal sheet.
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