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Re: GDT

Original poster: Steve Conner <steve@xxxxxxxxxxxx>


Original poster: "Alexander Turkin" <alex_3@xxxxxxx>

I've got a ferrite (for a Gate Drive Transformer) but it's quite small. So I have to use a thin wire. My question is: what wire can I use in it? I mean how thin it can be? What currents are present there?

The RMS current is practically nothing in a pulsed SSTC and a few hundred mA in a CW coil. You can use thin wire no problem. I've used 0.315mm magnet wire before. (of course safety/isolation is another matter that we won't get into here)

Can I make the number of turns less (for example, 10 turns primary and 10 turns each secondary)? What will change?

If you use too few turns the core will saturate and blow out your gate driver ICs. The minimum number of turns depends on the core size and the frequency you're running at. (the higher the frequency and the bigger the core, the fewer turns you need) 10 should be all right :P

Steve Conner