WEG CFW-09 User Manual page 141

CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
[Factory Setting]
Parameter
(3)
P161
Proportional Gain of
the Speed Regulator
P162 (3)
Integral Gain of the
Speed Regulator
142
Range
Unit Description / Notes
0.0 to 63.9
The gains for the speed regulator are automatically set based on the
[ 7.4 ]
value of parameter P413 (Tm Constant).
0.1
However, these gains can be manually adjusted in order to optimize the
dynamic response of the speed. Increase this value to have a faster
response. Although, reduce this value in case of speed oscillations.
0.000 to 9.999
In general, P161 smoothes abrupt changes of speed or reference, while
[ 0.023 ]
P162 reduces the error between the set point and the real speed value,
0.001
as well as improves the torque response at low speeds.
Optimization of the Speed Regulator – Procedure for manual setting:
1 - Select the acceleration (P100) and/or deceleration (P101) time
2 - Set the speed reference to 75 % of the maximum value;
3 - Configure the analog output AO3 or AO4 to Real Speed by setting
4 - Block the speed ramp – Start/Stop = Stop and wait until the motor
5 - Release the speed ramp – Start/Stop = Start; observe the motor speed
6 - Check among the options in figure 6.20 which waveform best represents
N (V)
Settings of P161 and P162 as a function of the type of response presented
in figure 6.20:
a) Increase the proportional gain (P161), and/or increase the integral
gain (P162).
b) Speed regulator is optimized.
c) Decrease the proportional gain (P161), and/or decrease the integral
gain (P162).
according to the application;
P255 or P257 to 2;
stops;
signal at the analog output AO3 or AO4 with an oscilloscope;
the signal measured with the oscilloscope.
N (V)
t (s)
a) Low Gain(s)
b) Optimized Speed
Figure 6.20 - Types of response for the speed regulator
N (V)
t (s)
c) High Gain(s)
Regulator
t (s)