Table of Contents
Advertisement
Commissioning
5.4 Quick commissioning using the BOP-2 operator panel
Control mode
Properties
● Typical settling time after a speed change:
100 ms ... 200 ms
● Typical settling time after a load surge: 500 ms
● The control mode is suitable to address the
following requirements:
–
–
–
● The control mode is insensitive with respect to
imprecise setting of the motor data
Application ex‐
● Pumps, fans, and compressors with flow
amples
characteristic
Motors that can
be operated
Max. output fre‐
quency
Torque control
Commissioning
● In contrast to sensorless vector control, the
speed controller does not have to be set
Select the default setting for the interfaces of the converter that is suitable for your application.
Figure 5-10
120
U/f control or flux current control (FCC)
Motor power ratings < 45 kW
Ramp-up time 0 → rated speed (depending
on the motor power rating):
1 s (0.1 kW) ... 10 s (45 kW)
Applications with steady load torque without
load surges
Induction motors
550 Hz
Without torque control
Default setting of the interfaces (Page 82)
Minimum and maximum motor speed
Sensorless vector control
● Typical settling time after a speed change:
< 100 ms
● Typical settling time after a load surge: 200 ms
● The control mode controls and limits the motor
torque
● Torque accuracy that can be achieved: ± 5% for
15% ... 100% of the rated speed
● We recommend the control mode for the
following applications:
–
Motor power ratings > 11 kW
–
For load surges of 10% ... >100% of the
rated motor torque
● The control mode 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).
● Pumps and compressors with displacement
machines
Induction and synchronous motors
Torque control with and without higher-level speed
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
240 Hz
control
SINAMICS G120XA converter
Advertisement
Table of Contents
