KEB COMBIVERT F5-H - Square Influence of the Controller Parameters

Page 7.7 - 4 COMBIVERT F5-A, -E, -H © KEB, 2012-10
Speed control
7.7.1.3 Squareinuenceofthecontrollerparameters
The speed controller parameters (KP, KI) can be inuenced depending on the actual speed with this function.
LowGain = 100%
KP speed gain / peak % = cS.07
KP speed limit / gain % = cS.08
Speed for square function = cS.14
Max. speed for square function = cS.13
K1 = -(LowGain – PKGain) / Speed^2
K2 = -(HiGain – PKGain) / (Speed^2 – 2*Speed*MaxSpeed+MaxSpeed^2)
n = 0…MaxSpeed
Gain(n) = if [n<Speed, LowGain + K1*n^2;hiGain + K2 * (n – MaxSpeed)^2]
Gain is internally limited to 0…800%
KP = cS.06 * Gain / 100%
Ki = cS.09 * Gain / 100%
Parameter Name Mode
cS. 05 Speed KPKi Mode (default value 0) 0 = variable KP/Ki
1 = square KP
2 = square Ki
3 = square KP + Ki
If the square mode is adjusted, the variable KI and KP have no function. The mode cS.11=-1 = brake release
is possible.
Possible curves (Gain):
0
20
40
60
80
100
120
0 500 1000 1500 2000
n [U/min]
Verstärkung [%]
Picture 1:cS.07=30; cS.08=100; cS.12=500; cS.13=1000, „resonance point“