Siemens SINAMICS G130 Engineering Manual page 317

Guide for selecting a drive system comprising an HT-direct motor and a SINAMICS converter
The following example explains all the individual steps which must be taken to design a drive system:
Technical requirements of the
1st step
motor (example data)
Determine the required Torque in
product profile continuous duty
(M
This is, for example:
Short-time
overload torque
(M
Mode of operation
Utilization
Rated voltage
Max. speed in
continous
operation
Cooling
Construction type
Environmental requirements
2nd step
of the motor
Determine the Ambient
installation conditions temperature
Installation
altitude
3rd step Motor selection
Determine the motor 1FW4453-1HF70-1AA0
Order No.
4th step Option selection
Complete the motor Define options for special versions
Order No. and tests.
16 000 Nm
)
cont.
18 000 Nm
)
overload
S1
Temperature
Class 155
(previously
temperature
class F)
690 V
765 rpm
Water with
max. inlet
temperature
25°C
IM B3
-20 to
+40 °C
< 1000 m
Drive Dimensioning
Engineering Information
Further notes and alternatives
M / M < 1.5: Rated torque = M
overload cont.
M / M > 1.5: Rated torque = M
overload cont.
Higher overloads on request.
When, instead of S1 duty, load duty cycles must be taken into
account: Average torque is calculated from the root of the
square of the required torques multiplied by the time divided by
the total time:
e.g. 140 %, 10 seconds, then 80 %, 30seconds, results in an
average 98.5 % of the rated torque:
× + ×
[(1.40² 10 0.80² 30) / 40]
In case of use according to temperature class 130 (previously
temperature class B), the motor must be designed for a torque
20 % higher:
= 1.2 x 16 000 = 19 200 Nm)
(e.g. M
cont.
Alternatively 400 V or 460 V
Rated speed according to catalog D86.2: 800 rpm, max.
permissible speed 20 % higher (800 x 1.2 = 960 rpm)
Allowance must be made for higher cooling-water inlet
temperatures using derating factors when the rated torque is
determined:
e.g. for 35°C: 16 000/0.95 = 16 840 Nm
See catalog D86.2 / page 30 for derating factors.
Further notes and alternatives
At ambient temperatures up to +40°C, derating factors are not
required for water-cooled motors.
At higher ambient temperatures in combination with cooling-
water inlet temperatures above 25 °C, the derating factors in
catalog D86.2 / page 30 apply.
For air-cooled motors, the derating factors defined in catalog
D86.2 / Chapter 3 must be applied.
For water-cooled motors, the installation altitude is not relevant
with respect to derating factors.
For installation altitudes > 1000 m above sea level, the
conditions of the converter must however be taken into account.
For air-cooled motors, the derating factors defined in catalog
D86.2 / Chapter 3 must be applied.
Further notes and alternatives
See "Selection and ordering data" catalog D86.2 / Chapter 2.
Due to the current-carrying capability of the motor terminal box
(max. 1230 A), the motor is designed with two terminal boxes
and two electrically isolated winding systems.
Further notes and alternatives
See "Special versions" catalog D86.2 / Chapter 2.
SINAMICS Engineering Manual - May 2008
cont.
/ 1.5
overload
=
. 0 985
317/396
© Siemens AG