| 摘要 |
<p>The invention relates to a rotor construction of an asynchronous electric machine used in high-speed technology, in which rotor construction on top of the rotor shaft, parallel with its longitudinal direction, is mounted a plate stack construction or the like consisting thin plates, and a squirrel cage is mounted in connection with the plate stack construction. The thickness of the rotor back (8) is dyr = (∑2 * Uv) / 4 * π * f * N * L * κ * br'), where Uv = phase voltage [V], f = supply frequency [Hz], κ = coiling ratio, L = length [m] of the stator stack, N = number of coil rounds as per each phase, and br' = imaginary density of magnetic flux, in which the imaginary magnetic flux density (br') of the rotor back (8) has been chosen as follows: br' ≥ 2,5 T (tesla), br' = 2,5 to 5 T (advantageously), and br' > 5 T (satisfactorily).</p> |
