Hi all,
NOw I have completed quite a bit.yet there are two issues that are still dogging me.
1.Output stabitity,
2.Heat at no load( the power dissipation)

The output sine wave is quite stable as long as the system does not enter the closed loop.
Once it enters there is a continuous up/down swing of out put voltage and sine wave.

We could control it to quite a bit by putting a PI controller before the feed back.
still there is a fluctuation of about5 to 6 volts.


2.heat is toomuch.the no load currnent of the unit is 2A at 24V and when added with more during loading,i am afraid I can run unit like this.
any suggestions are welcome!