Sougata, Thanks for such a clear guidance.
I am in located in a village called "Sanjan" in GUJARAT, the registration didn't ask questions so may be the profile is not updated i will update it anyway.
Also how can we use the same transformer for charging, since the transformer is in full bridge the MOSFET's body diodes will pass the uncontrolled charging once mains supply is given to transformer.Mains voltage is not same every where then how is charging control achieved unless transformer voltage is quite samll ?
One of my friend told me that SMPS based design is not suitable for all types of load that's why i am doing with 50Hz type transformer
Also my magnetics knowledge is quite poor, I do some designing based on formulas but you can not get good results without practical knowledge, i agree. That's why i am requesting from forum If any body can help me in transformer I would be really thankful.