We need to improve PF and current harmonics performance for PFC converter during 122vac and line frequency range of 500hz to 900hz.
Converter details
Input: 100V to 122Vac, 400hz to 900hz sinewave / Output : 215Vdc, 150W / Fsw: 125Khz, CCM operation / Power components : , L-340uH at 3.5A, Input capacitor 33nF, Output capacitor 1000uF.
At 122Vac/700Hz the PF is 0.955 and THDi is 4%, we need to improve the same to 0.97 and 3% resp. (Input voltage and current waveform is below)
At 122Vac/900Hz the PF is 0.3 and THDi is 5%, we need to improve the same to 0.97 and 3% resp.
PFC output voltage is not allowed to increase at this time, would like to know what we can try in control side of the IC to improve performance at 700Hz to 900Hz range.
