Siemens sinamics G120 Operating Instructions Manual page 125

Select a suitable application class
When selecting an application class, the inverter appropriately sets the closed-motor control.
Application Standard Drive Control
class
Motors that
can be oper-
ated
Power Mod-
ules that can
be operated
Application
Pumps, fans, and compressors
•
examples
with flow 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
•
correction
time after
a load
surge:
500 ms
Standard
•
Drive
Control is
suitable
for the fol-
lowing requirements:
– Motor power ratings < 45 kW
– Ramp-up time 0 → Rated
speed (dependent on the rated
motor power):
1 s (0.1 kW) ... 10 s (45 kW)
– Applications with constant load
torque without load surges
Standard Drive Control is insensi-
•
tive with respect to imprecise set-
ting of the motor data
Converter with CU250S-2 Control Unit
Operating Instructions, 01/2016, FW V4.7 SP6, A5E31759476B AE
Induction motors
Dynamic Drive Control
without encoder
Induction and synchronous motors
PM240, PM240-2, PM340
Pumps and compressors with
•
displacement machines
Rotary furnaces
•
Extruder
•
Centrifuges
•
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
We recommend Dynamic Drive
•
Control for the following appli-
cations:
– Motor power ratings
> 11 kW
– For load surges 10 % ... >100 % of the rated 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).
Torque accuracy that can be
•
achieved: ± 5 % for 15 % ...
100 % of the rated speed
Commissioning
5.3 Quick commissioning with a PC.
Dynamic Drive Control
with encoder
Vertical conveyor technolo-
•
gy (conveyor belts, roller
conveyors, chain convey-
ors)
Escalators/moving stairways
•
Lifter/lowerer
•
Elevators
•
Gantry cranes
•
Cable railways
•
Stacker cranes
•
The control extends the
•
torque accuracy ± 5 %, also
for speeds < 15 % of the
rated speed.
125