2.7.9 Tuning the Drive Closed Loop Controller
Once the frequency converter's closed loop controller has been set up, the performance of the controller should be tested.
In many cases, its performance may be acceptable using the default values of
20-93 PI Proportional Gain
and
20-94 PI Integral
Time
. However, in some cases it may be helpful to optimize these parameter values to provide faster system response while
still controlling speed overshoot.
2.7.10 Manual PI Adjustment
1.
Start the motor.
2.
Set
20-93 PI Proportional Gain
to 0.3 and increase it until the feedback signal begins to oscillate. If necessary, start
and stop the frequency converter or make step changes in the set-point reference to attempt to cause oscillation.
Next reduce the PI proportional gain until the feedback signal stabilises. Then reduce the proportional gain by
40-60%.
3.
Set
20-94 PI Integral Time
to 20 s and reduce it until the feedback signal begins to oscillate. If necessary, start and
stop the frequency converter or make step changes in the set-point reference to attempt to cause oscillation. Next,
increase the PI integral time until the feedback signal stabilises. Then increase of the integral time by 15-50%.
Product Overview
VLT
®
HVAC Basic Drive FC 101 Design Guide
MG18C502 - Rev. 2013-09-06
31
2
2
Содержание VLT HVAC Basic Drive FC 101
Страница 1: ...MAKING MODERN LIVING POSSIBLE Design Guide VLT HVAC Basic Drive FC 101 www danfoss com drives...
Страница 2: ......
Страница 123: ...Index VLT HVAC Basic Drive FC 101 Design Guide MG18C502 Rev 2013 09 06 121...
Страница 124: ...www danfoss com drives MG18C502 130R0222 MG18C502 Rev 2013 09 05...