Technical Data And Characteristics; Mode Of Operation And Characteristics - Siemens SINAMICS S120 Configuration Manual

Technical data and characteristics

4.1

Mode of operation and characteristics

A constant torque M
constant-power range begins from the rated operating point (see P/n characteristic).
Induction motors have a high overload capacity in the constant power range. For some
induction motors, the overload capacity is reduced in the highest speed range.
At higher speeds, i.e. in the constant power range, the maximum available torque M
specific speed n is approximated according to the following formula:
For main spindle applications, the constant power range used to machine a workpiece with
constant cutting power is extremely important. The required drive converter power can be
reduced by optimally utilizing the constant power range.
The following limits and characteristics apply as basis for all induction motors fed from drive
converters.
Figure 4-1
1PH4 Induction Motors
Configuration Manual, (APH4S), 08/2008, 6SN1197-0AD64-0BP1
is available from standstill up to the rated operating point. The
N
Power characteristics, limits and curves; torque-speed diagram
4
at a
max
61