Im building an ac/dc converter for a battery charger, it takes in 120V AC in and outputs 90V DC at 20A max. To further improve the output performance of the buck converter, i decided to build a pi filter containing 2 capacitors and an inductor..it is essentially used to filter harmonics at at 100 kHz. What do you think of the schematic?
Having a switch in the negative line and an asymmetrical filter with inductors in the positive line generates maximum common mode interferences and doesn't make much sense, EMI wise.
Having a switch in the negative line and an asymmetrical filter with inductors in the positive line generates maximum common mode interferences and doesn't make much sense, EMI wise.
That's in fact much better. You should check if the filter behavior is acceptable with the load transients in your circuit. The about 1 kHz cut-off frequency of the LC low-pass might cause heavy ringing in some cases, similarly the input LC filter.