GE AF-650 GP Programming Manual page 96

Motor size
0.25 kW - 7.5 kW
H-64 Resonance Dampening
Range:
100 %* [0 - 500 %]
H-65 Resonance Dampening Time Constant
Range:
5 ms* [5 - 50 ms]
H-66 Min. Current at Low Speed
Range:
100 %* [1. - 200. %]
3.7.6 H-7# Adjustable Warnings
Parameters to configure the warnings limits for current, speed, reference, and feedback.
Warnings are shown on display, programmed output or serial bus.
Change-over
> 10 Hz
Function:
Enter the resonance dampening value. Set par. H-64 Resonance Dampening and par. H-65 Resonance
Dampening Time Constant to help eliminate high-frequency resonance problems. To reduce resonance
oscillation, increase the value of par. H-64 Resonance Dampening.
Function:
Set par. H-64 Resonance Dampening and par. H-65 Resonance Dampening Time Constant to help eliminate
high-frequency resonance problems. Enter the time constant that provides the best dampening.
Function:
Enter the minimum motor current at low speed, see par. H-53 Model Shift Frequency. Increasing this
current improves motor torque at low speed.
par. H-66 Min. Current at Low Speed is enabled when par. H-40 Configuration Mode = Speed open loop [0]
only. The frequency converter runs with constant current through motor for speeds below 10 Hz.
For speeds above 10 Hz, the motor flux model in the frequency converter controls the motor. par.
F-40 Torque Limiter (Driving) and / or par. F-41 Torque Limiter (Braking) automatically adjust par.
H-66 Min. Current at Low Speed. The parameter with the highest value adjusts par. H-66 Min. Current at
Low Speed. The current setting in par. H-66 Min. Current at Low Speed is composed of the torque gener-
ating current and the magnetizing current.
Example: Set par. F-40 Torque Limiter (Driving) to 100% and set par. F-41 Torque Limiter (Braking) to 60%.
par. H-66 Min. Current at Low Speed automatically adjusts to about 127%, depending on the motor size.
AF-650 GP Programming Guide
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