Dimitrisvlamis
Member level 2
Greetings everyone ,
I am facing a problem 1 month now and i cant understand why. I am following a guide (https://microcontrollerslab.com/ferrite-transformer-turns-calculation/) this one. and i cant work the circuit out. At first i tried this circuit
but i burned out all of my mosfets (more than 10 so far), i added a snubber circuit wich didnt do anything.
I calculated the transformer turns from the datasheet of the core and i got 3+3 turns and 150turns to step up 8-16v to 400v. After i gave up i tried to do a different circuit which they sell on ebay and stuff. its this one
with no luck as well! i winded 2 transformers one with 4+4 and 75 turns for 200v (EI33) and one 3+3 and 150turns for 400v (EC42). Nothing seems to work even in an open circuit with no feedback as the second one. When i put load the transistors get hot and nothing happens. They even get hot with no load. I am beggining to think i winded wrong the transformer, but i did it same way i was when i bought it. it had in the bottom the primary with 90turns and above it a primary of 3+3 with center tap with copper foil instead of wires. I am wiring the coils in the same direction and i get nothiing. Any suggestions??
I am facing a problem 1 month now and i cant understand why. I am following a guide (https://microcontrollerslab.com/ferrite-transformer-turns-calculation/) this one. and i cant work the circuit out. At first i tried this circuit
but i burned out all of my mosfets (more than 10 so far), i added a snubber circuit wich didnt do anything.
I calculated the transformer turns from the datasheet of the core and i got 3+3 turns and 150turns to step up 8-16v to 400v. After i gave up i tried to do a different circuit which they sell on ebay and stuff. its this one
with no luck as well! i winded 2 transformers one with 4+4 and 75 turns for 200v (EI33) and one 3+3 and 150turns for 400v (EC42). Nothing seems to work even in an open circuit with no feedback as the second one. When i put load the transistors get hot and nothing happens. They even get hot with no load. I am beggining to think i winded wrong the transformer, but i did it same way i was when i bought it. it had in the bottom the primary with 90turns and above it a primary of 3+3 with center tap with copper foil instead of wires. I am wiring the coils in the same direction and i get nothiing. Any suggestions??