To select the frequencies at which to estimate the plant response, click the + icon.
In the Add frequencies dialog box, specify 30 logarithmically spaced frequencies ranging
from 10 Hz to 15 kHz.
Set the amplitude at all frequencies to 0.036, which is 5% of the steady state duty cycle to
ensure that the system is properly excited. If the input amplitude is too large, the
operating point of the power factor corrector changes. If the input amplitude is too small,
the sinestream is indistinguishable from ripples in the power electronics circuits. Both
these situations result in inaccurate frequency response estimation.
Leave all other sinestream settings at their default values.
Design PID Controllers for a Power Factor Corrector using Frequency Response Estimation Method