Siemens SINAMICS S150 - Page 136

Fundamental Principles and System Description
Engineering Information
SINAMICS Engineering Manual – November 2015
Ó Siemens AG
136/528
Based on the equations and diagrams given above, the peak value V
PP
of the phase-to-phase voltage at the motor
winding can be exactly calculated for motor cable lengths with maximum reflection factor:
r
V
V
VV
Line
DCLink
LinePP
××=
.
The following tables provide an overview of the peak values V
PP
of the phase-to-phase voltage at the motor winding
for typical SINAMICS drive configurations as a function of the influencing variables described above for motor cable
lengths with maximum reflection factor.
The peak values V
PP
on the motor terminals are the lowest on drives with Basic Infeed operating in motor mode
(G130, G150, S120 Basic Line Modules) or on drives with Smart Infeed.
Line supply voltage
V
Line
DC link voltage
V
DCLink
≈ 1.35
*
V
Line
Peak voltage V
PP
on motor terminals with
a reflection factor of 1.7
Peak voltage V
PP
on motor terminals with
a reflection factor of 2.0
400 V 540 V 920 V 1080 V
460 V 620 V 1050 V 1240 V
480 V 650 V 1100 V 1300 V
500 V 675 V 1150 V 1350 V
600 V 810 V 1380 V 1620 V
660 V 890 V 1510 V 1780 V
690 V 930 V 1580 V 1860 V
Peak values V
PP
at the motor with Basic Infeed or Smart Infeed
The peak values V
PP
on the motor terminals are somewhat higher on drives with Active Infeeds as these operate as
step-up converters (S150, S120 Active Line Modules).
Line supply voltage
V
Line
DC link voltage set to
factory value
V
DCLink
= 1.5
*
V
Line
Peak voltage V
PP
on motor terminals with
a reflection factor of 1.7
Peak voltage V
PP
on motor terminals with
a reflection factor of 2.0
400 V 600 V 1020 V 1200 V
460 V 690 V 1170 V 1380 V
480 V 720 V 1220 V 1440 V
500 V 750 V 1270 V 1500 V
600 V 900 V 1530 V 1800 V
660 V 990 V 1680 V 1980 V
690 V 1035 V 1760 V 2070 V
Peak values V
PP
at the motor with Active Infeed
The peak values V
PP
on the motor are the highest during braking when the V
dc max
controller or a connected braking
unit is active. In the case of a braking unit, it is assumed that its response voltage has been adjusted according to the
line voltage, i.e. that the lower response voltage of the braking unit is selected for low line voltages. For further
details, please refer to the chapters on specific converter types, e.g. "Converter Chassis Units SINAMICS G130" and
"Converter Cabinet Units SINAMICS G150".
Line supply voltage
V
Line
Response voltage
of braking unit
Peak voltage V
PP
on motor terminals with
a reflection factor of 1.7
Peak voltage V
PP
on motor terminals with
a reflection factor of 2.0
400 V 673 V (lower threshold) 1140 V 1350 V
460 V 774 V (upper threshold) 1320 V 1550 V
480 V 774 V (upper threshold) 1320 V 1550 V
500 V 841 V (lower threshold) 1430 V 1680 V
600 V 967 V (upper threshold) 1640 V 1934 V
660 V 1070 V (lower threshold) 1820 V 2140 V
690 V 1158 V (upper threshold) 1970 V 2320 V
Peak values V
PP
at the motor in braking operation with a braking unit