LC filter for pure sine wave inverter

[pakkiboy]

Dear Members , I have designed pure sine wave inverter using SG3525 and IR2101 . Now at last stage i just want to design LC filter . I have used switching freq 16khz of mosfets . Now i have designed LC filter of this value by using formula , F = 1/(2*PI*SQRT(L*C)), I have used F=50 hz , C=330uF and L = 30.703mH , when i used this filter at outside of Inverter 220 AC , it doesnot work , But if i step down 220V AC to 12 V AC ( using step down transformer ) i got pure sine wave .. Can u plz help me about my mistake and what changes should i make for high voltage . plz , Will be greatly thankful

 

[BradtheRad]

A recent thread here discusses an LC filter for a similar sinewave inverter.

It is three pages worth and it may have helpful information.

https://www.edaboard.com/threads/298601/