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Registered Member #3925
Joined: Fri Jun 03 2011, 10:50AM
Location:
Posts: 121
hi,
a few questions about the zvs circuit,
is the input to the circuit ac or dc? and if its ac, is it mains frequency ac? and this is a resonant circuit, does the inductor define the resonance frequency? or is it the transformer that does that? and must i wind my own primary, and not use the existing one? and have you found any better circuits, interms of efficiency, highest output voltage and current etc? maybe a 555 timer circuit,
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
The input is DC. nominally 12V. Higher voltages can be used, the zener diodes limit voltage to 12V on the drive side, but if you want to use a higher voltage it is best to have a separate 12V supply for the drive side. (circuits are out there if you use the search function or google)
The centre-tapped primary of the transfoermer and the capacitor determine the frequency. I think the frequency changes under load, due to the inductance of the primary changing, but I'm not certain about this.
You need to wind your own centre tapped primary, usually 5 + 5 turns, if I remember correctly.
There are more efficient circuits, etc. The main advantage of the Mazilli ZVS circuit is it's simplicity.
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ZVS flyback driver help?
