Hi
i need to make 12V-24V DC to 230V DC
inverter so i make one like this
i use Push-Pull topology and this circuit for it
http://2.bp.blogspot.com/-IGrcj4RjyY...cuit
+50kHz.png
and i use ER35 core
this is my formula Npri
http://3.bp.blogspot.com/-
vEX8Rr_RdD...alculation.png
i enter my valuve like this Vin(nom) = 24V, F
= 50000, Bmax = 1500(guass), Ae = 1.07
then my Npri = 8
and i want output like 230V 25W so i get
maximum duty cycle = 98% and my Vin(min)
= 11
so 0.98*11=10.78 and i get voltage ratio
(secondary : primary) = 250v:10.78 = 23.1
Nsec = N * Npri = 23.1*8 = 184.8
then my Nsec = 185
i get swg 26 as pri and swg 34 as sec
when i supply 12v my FET are not heat and
work fine
when i supply 24v inverter work but FET gone
heat
what is the wrong in my circuit can someone
help me please
(my english knowledge is not good sorry
about it)