ABB PSE 18 User Manual

Softstarters Type PSE18...PSE370 Installation and commissioning manual 1SFC132057M0201 65 Chapter 7
7.5.7 Torque Control during stop ramp
When activating this parameter (On) makes it possible to control the motor torque
during stop. Using torque control will result in a more suitable decelerating of the
speed mainly requested when stopping pumps.
When using torque control the output voltage to the motor is controlled so that
the motor torque will follow a predened optimal curve for best possible stop. This
has the benet that the mechanical stopping behavior of the equipment driven by
the motor will be much softer compared to using voltage ramp. This can be espe-
cially useful in pump applications where a sudden stop can cause water hammer-
ing and pressure surges. During the torque controlled stop the motors voltage
and RPM will follow the graphs in gure 7.17.
Display Default
value
Setting
range
Description
OFF On/OFF Torque Control during stop ramp
The time for the Torque Control during stop ramp is set in the parameter Stop
Ramp time.
Figure 7.16: Torque Control during stop
ramp parameter displayed
Figure 7.17: The function of Torque
Control during stop ramp
1SFC132163F0001
RPM
U

ABB PSE 18 Specifications

General

Brand	ABB
Model	PSE 18
Category	Controller
Language	English