Hi e2e,
I try to improve the THD of my system (400Hz, 115V). Therefore, the multiplier of the PFC controller UC2854A must be improved. The inputs Vsense and Vrms are understandable, but not the IAC input. After the rectifier arise 800Hz with positive half-waves. This should also be present at the entrance of the IAC. However, only every second half-wave is measured, which corresponds to a frequency of 400Hz. This behavior is very unusual and I would like to know more about the IAC input.
Thanks.
Yours sincerely,
A.Schwarz