| 摘要 |
An electrical machine incorporates a rotor core assembly (30) wherein the core (33) has rotor bars (31) extending into and secured within slots of end rings (34) either side of the core (33). The core (33) is secured in axial compression upon a shaft (35) by at least inner clamp rings (37). These inner clamp rings (37) include a recess, which in association with a recess in an outer clamp ring (38) forms a cavity to retain a clamp section (36) of the respective end rings (34). The outer clamp ring (38) is secured to the inner clamp ring (37) typically using bolts. Thus, the structural strength of the clamp rings (37, 38) inhibits differential radial growth between the core (33) and the end rings (34) due to thermal, rotational and centrifrugal expansion.
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