Hi, are you using boost topology in your desinge? or you want to used 50Hz iron core transformer to step it up,and you complain of your mosfet are heating up if the voltage increases,can you tell me the type of mosfet you used for you desinge and how do you generate you pwm signal,you can upload your circute diagram if posible let see if their are error which make your inverter not to work properly.
thank you for this wonderful post, please if there is any further information about the circuit please, this is my email address ok_chu2win@yahoo.com, i need a nice inverter circuit containing all the details information.