5
05.01
5.5 Operating power modules from an unregulated infeed
5-134
©
Siemens AG 2012 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
5.5
Operating power modules from an unregulated infeed
The drive modules can be operated from both unregulated and regulated supply
modules belonging to the SIMODRIVE 611 drive converter system. The engi-
neering and power data of this Configuration Manual refer to operation with the
regulated infeed/regenerative feedback modules. This data should be cor-
rected, if required, when operated from unregulated infeed modules.
Operating drive modules with PH and 1FE1 motors and induction motors
from an unregulated infeed
When operation is with an unregulated infeed (e.g. UI module or unregulated
operated I/R module), a lower maximum motor output is available in the upper
speed range than with the use of the infeed/regenerative feedback module.
As a result of the low DC link voltage of 490 V (for a line supply infeed with
400 V 3–ph. – 10%) for the UI module or unregulated operated I/R module, the
available continuous output is given by:
If
< 1
U
ZK
1.5 x V
N motor
then, only the following continuous power is available
P
continuous
= P
N
U
ZK
1.5 x V
N motor
U
DC link
= line voltage
1,35
U
DC link
= 436 V
for 360 V –10 % line voltage
U
DC link
= 486 V
for 400 V –10 % line voltage
V
N motor
should, for the particular motor, be taken from the appropriate docu-
mentation (refer to Appendix, References).
As a result of the lower DC link voltage, it is possible that motor rated speeds
will no longer be able to be reached, refer to Engineering the motors. In this
case, the speed of the motors, and therefore the power, must be appropriately
reduced.
Power P
Speed n
Motor power limit with
I/R module
Motor power limit with
UI module
S6
S1
1
1
2
2
Fig. 5-10
Speed/power graph
5 Power Modules
10.04
05.08
02.12
