52 Digistart D3: User Guide
Issue: G
7.3.2 TVR Soft Stop
Timed voltage ramp reduces the voltage to the motor gradually over a defined time. The load may continue to run
after the stop ramp is complete.
Timed voltage ramp stopping can be useful for applications where the stop time needs to be extended, or to avoid
transients on generator set supplies.
Voltage (% full voltage)
1: Stop Time (Pr 2I)
7.3.3 Adaptive Control for Stopping
In an adaptive control soft stop, the Digistart D3 controls the current in order to stop the motor within a specified time
and using a selected deceleration profile. Adaptive Control can be useful in extending the stopping time of low inertia
loads.
NOTE
Adaptive control does not actively slow the motor down and will not stop the motor faster than a coast to
stop. To shorten the stopping time of high inertia loads, use brake.
Every application has a particular stopping profile, based on characteristics of the load and the motor. Adaptive
Control offers three different stopping profiles. Choose the adaptive control profile that best matches your application
requirements.
Adaptive Control
To use Adaptive Control to control stopping performance:
1. Select Adaptive Control from the Stop Mode menu (Pr 2H)
2. Set the desired Stop Time (Pr 2I)
3. Select the required Adaptive Stop Profile (Pr 2K)
Speed
10
0%
90%
80%
7
0%
60%
5
0%
4
0
%
3
0%
20
%
1
0%
0
04835.C
1
2 3
4
Adaptive Stop Profile (Pr 2K):
1. Early Deceleration
2. Constant Deceleration
3. Late Deceleration
4. Stop Time (Pr 2I)
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