Bipolar Slayer Royer SSTC

487

04:27:57

I'm not sure what to call this exactly, but it bears some similarity to the slayer/SSTC, the Royer, and the popular cross-coupled ZVS flyback/induction heater.

I got the idea while studying the multitude of slayer exciters found on the EC community.  Virtually all of the circuits I found were unipolar; using one transformer, one inverter and one power transistor.  Of course there's nothing wrong with this topology, but I thought this was a pretty natural extension to the concept. I'm kind of surprised no one beat me to this.

A lot of this design came from trial and error and it's certainly still rough around the edges.  All questions, comments and constructive criticism are welcome.

-J

published 9 years ago

WTFCircuit

9 years ago

Tecnically you aren't the first to think about a circuit like that. I myself was wondering about a similar design, but I came to some problems. First you need two perfectly identical coils (which is not possible in the real world) the main reason is because you're circuit will never be able to find a balance and fall out of resonance from both coils, which will make crappy results ( also I'm not sure if you can call this a zvs, not sure why). Anyway the design is rather interesting and works way better than mine

BillyT

9 years ago

40W zeners might also be hard to find. Fixed that, 1k gate resistors.

jpoulin0901

9 years ago

WTF: I tried unbalancing the coupling constants, the number of secondary turns and the top-load capacitance by 5% or so without losing too much performance.

jpoulin0901

9 years ago

Billy: How do you figure my zeners are dissipating 40W? I see more like 10W peak each. In any case, I think you're right about toning down the feedback. Even 20W is unnecessary wear and loss of efficiency. Thanks.

BillyT

9 years ago

When I first measured the zener current it was over 3A PP at 20 V, and 5 k resistor in the feed back line helped also.

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