Siemens SINAMICS S120 Configuration Manual page 38

Configuring
2.3 Selecting and dimensioning induction motors
Example of the calculation of n
A specific power of P
The field weakening range should be 1 : 3.5.
Calculation of the required rated speed n
38
N
= 8 kW is required at n
max
= 5250 rpm.
max
: 5250 / 3.5 rpm = 1500 rpm.
N
Configuration Manual, (APH4S), 08/2008, 6SN1197-0AD64-0BP1
1PH4 Induction Motors