Motor Selection; Selection Of Motor Modules; A High Field Weakening Range Is Required - Siemens SINAMICS S 1PH7 Configuration Manual

Configuration
2.3 Selecting and dimensioning induction motors

Motor selection

Table 2- 3 The motor is selected depending on the cycle duration and the thermal time constant
Cycle duration
T/T ≤ 0.1 (cycle duration of 2 to 4 min)
th
0.1 ≤ T/T ≤ 0.5 (cycle duration of approx. 3 to approx.
th
20 min)
T/T > 0.5 (for a cycle duration of approx. 15 min)
th

Selection of Motor Modules

The required currents for overload are specified in the power-speed characteristics (powers
for S6-25 %, S6-40 %, S6-60 %). Intermediate values can be interpolated.
2.3.6

A high field weakening range is required

Proceed as follows for applications with a field-weakening range greater than for standard
induction motors:
Starting from the max. speed n
must be selected which provides the required power P
Finally, a check should be made as to whether the motor can generate the torque or the
power at the transition speed required by the application (n
46
Motor selection
A motor with the following rated torque M
selected:
M > M and M
N rms
A motor with the following rated torque M
selected:
If, for duty cycles, torques occur above M
0.5 T , then a motor with the following rated torque should
th
be selected: M
N
and the power P
max max
Configuration Manual, (APH7W), 04/2009, 6SN1197-0AD72-0BP0
N
< 2 M
max (cycle) N
N
N
> M .
max (cycle)
required at maximum speed, a motor
at this operating point (n
max
, P ).
N N
1PH7 induction motors (Machine tools)
should be
should be
for longer than
, P ).
max max