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Design an Isolated battery charger with PFC( power factor correction), which will take input from 230V 3-phase supply. Calculate the value of inductor, transformer and capacitors used. Also, select appropriate switching devices and mention the components used.Required output :117 volt and 40 Amp.

What i have done is i have used the 3 phase rectifier and the caluculation of output rms is V=304.062v and supply current is =69.28A.

Now i am stuck here what should be my net step for smoothening and for PFC.

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What i have done is i have used the 3 phase rectifier

I think you have fallen over at the first step. When you have a conventional 3 phase rectifier only two of the three phases supply current to the output at any one time and this means serious harmonic distortion. A quote from here: -

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So, my advice is to use a topology that works with the 3 phases as individual circuits and apply PFC individually then combine the outputs to get the DC bus voltage like this: -

enter image description here

Picture taken from here

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