Siemens SINAMICS S150 - Page 516

Drive Dimensioning
Engineering Information
SINAMICS Engineering Manual – November 2015
Ó Siemens AG
516/528
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:
1st step
Technical requirements of the
motor (example data)
Further notes and alternatives
Determine the required
product profile
This is, for example:
Torque in
continuous duty
(M
cont.
)
16 000 Nm
Short-time
overload torque
(M
overload
)
18 000 Nm
M
overload
/ M
cont.
< 1.5: Rated torque = M
cont.
M
overload
/ M
cont.
> 1.5: Rated torque = M
overload
/ 1.5
Higher overloads on request.
Mode of operation S1 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:
985.040] /30)0.80²10[(1.40² =´+´
Utilization Temperature
Class 155
(previously
temperature
class F)
In case of use according to temperature class 130 (previously
temperature class B), the motor must be designed for a torque
20 % higher:
(e.g. M
cont.
= 1.2 x 16 000 = 19 200 Nm)
Rated voltage 690 V Alternatively 400 V or 460 V
Max. speed in
continous
operation
765 rpm Rated speed according to Catalog D86.2: 800 rpm, max.
permissible speed 20 % higher (800 x 1.2 = 960 rpm)
Cooling Water with
max. inlet
temperature
25°C
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 2/10 for derating factors.
Construction type IM B3
2nd step
Environmental requirements
of the motor
Further notes and alternatives
Determine the
installation conditions
Ambient
temperature
-20 to
+40 °C
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 2/10 apply.
For air-cooled motors, the derating factors defined in Catalog
D86.2 / page 3/12 must be applied.
Installation
altitude
< 1000 m 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 / page 3/12 must be applied.
3rd step Motor selection Further notes and alternatives
Determine the motor
Order No.
1FW4453-1HF70-1AA0 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.