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Registered Member #8817
Joined: Mon Dec 17 2012, 05:16AM
Location: Australia
Posts: 110
i need to buy weigh scales lol Hopefully they are under 500g each as the postage is cheaper, im on night shift tonight and tomorrow night so wont get around to them until the weekend.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Hello Fiddy,
in the data sheet you say: "If you exceed 3V per turn on the primary coil by putting too few turns on the primary coil, the secondary voltage may exceed the secondary insulation breakdown voltage and damage the transformer."
The secondary has 3000 turns, so if I put 3V/turn to the primary, I get 9kV on the secondary, assuming sine wave driving and no resonance.
With a square wave, the peak output will be higher because of the ringing, but still if you don't run it at resonance, it can be nowhere near 83kV.
And just a last question, the 83 kV insulation rating is the breakdown voltage or working voltage? Does it assume the RF AC voltage (corona problems, etc) or is it just calculated from insulation thickness for DC voltage?
Registered Member #8817
Joined: Mon Dec 17 2012, 05:16AM
Location: Australia
Posts: 110
Dr. Dark Current wrote ...
Hello Fiddy,
in the data sheet you say: "If you exceed 3V per turn on the primary coil by putting too few turns on the primary coil, the secondary voltage may exceed the secondary insulation breakdown voltage and damage the transformer."
The secondary has 3000 turns, so if I put 3V/turn to the primary, I get 9kV on the secondary, assuming sine wave driving and no resonance.
With a square wave, the peak output will be higher because of the ringing, but still if you don't run it at resonance, it can be nowhere near 83kV.
And just a last question, the 83 kV insulation rating is the breakdown voltage or working voltage? Does it assume the RF AC voltage (corona problems, etc) or is it just calculated from insulation thickness for DC voltage?
Thanks, Jan
I see what you mean, it was designed for ZVS operation or flyback mode, i should probably put that on the rating.
83kVpk insulation rating is the breakdown voltage calculated by the manufacturer based on insulation thickness.
Registered Member #8817
Joined: Mon Dec 17 2012, 05:16AM
Location: Australia
Posts: 110
Artlav wrote ...
Hm? That raises the question of why i haven't even got a PM yet.
Im getting there. you havent been forgotten! Im a single bloke who works 12 hour shift work so sometimes its hard to find the time. I sent Rod on and mbd their's first because they are already in Australia.
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Modern AC Flyback Transformers
