Siemens SINAMICS G120 Operating Instructions Manual page 153

Selecting a suitable application class
When selecting an application class, the inverter assigns the appropriate settings to the
motor control.
Application class
Motors that can
be operated
Power Modules
that can be op-
erated
Application ex-
Pumps, fans, and compressors with flow
•
amples
characteristic
Wet or dry blasting technology
•
Mills, mixers, kneaders, crushers, agitators
•
Horizontal conveyor technology (conveyor
•
belts, roller conveyors, chain conveyors)
Basic spindles
•
Properties
Typical correction time after a speed
•
change: 100 ms ... 200 ms
Typical correc-
•
tion time after a
load surge:
500 ms
Standard Drive
•
Control is suita-
ble for the follow-
ing requirements:
–
–
–
Standard Drive Control is insensitive with
•
respect to inaccurate motor data settings
Max. output
frequency
Torque control
Commissioning
Contrary to "Dynamic Drive Control" a speed
•
controller does not have to be set
In comparison to "Configuration for experts":
•
–
–
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
Standard Drive Control
Induction motors
Motor power
ratings
< 45 kW
Acceleration time 0 → rated speed (de-
pending on the rated motor power):
1 s (0.1 kW) ... 10 s (45 kW)
Applications with increasing load torque
without load surges
550 Hz
Without torque control
Simplified commissioning using preas-
signed motor data
Reduced number of parameters
Induction and synchronous motors
PM240, PM240-2, PM340
Pumps and compressors with displacement ma-
•
chines
Rotary furnaces
•
Extruder
•
Centrifuge
•
Typical correction time after a speed change:
•
< 100 ms
Typical correction time
•
after a load surge:
200 ms
Dynamic Drive Control
•
controls and limits the
motor torque
Torque accuracy that
•
can be achieved:
± 5 % for 15 % ...
100 % of the rated
speed
We recommend Dynamic Drive Control for the
•
following applications:
– Motor power ratings > 11 kW
– For load surges of 10 % ... >100 % of the rat-
ed motor torque
Dynamic Drive Control is necessary for a ramp-
•
up time 0 → rated speed (dependent on the rated
motor power): < 1 s (0.1 kW) ... < 10 s (250 kW).
Speed control with lower-level torque control
Reduced number of parameters when compared
•
to "Configuration for experts"
Commissioning
5.4 Quick commissioning with a PC.
Dynamic Drive Control
240 Hz
153