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Registered Member #5323
Joined: Fri Jun 15 2012, 02:14PM
Location:
Posts: 104
I've searched the net looking for a large inductor in the general range of 50H (Henry, not mH) that is wound with wire capable of handling 2000v. No luck. I suppose because of its large H value, its not a common component. Can anybody point me in the right direction for such an inductor?
Registered Member #33
Joined: Sat Feb 04 2006, 01:31PM
Location: Norway
Posts: 971
It all depends on how much current it should handle. Three or so MOT secondaries in series is a cheap and easy way to do it, if that solution fulfills all your other requirements in addition to inductance and voltage.
Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1716
As others have said, we need more specs.
Maximum current?
Maximum temperature rise?
Continuous operation vs. small duty cycle? Former could be a thermal limit, latter could be a saturation limit.
Frequency?
Is 2000V required between adjacent wire turns, as implied in OP? Or between layers, or between the inductor terminals, or isolation between inductor and case?
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
Hazmatt_(The Underdog) wrote ...
Ash, Fender/Marshall/HiWatt, any of those audio rated chokes are not insulated for much over 500V.
What he is looking for is a plate choke out of an old transmitter, obviously for a large power supply he is building.
Yes, but say you had five 10H chokes in series the voltage over each would be 400V.
A lot of these chokes sold for old tube guitar amps are only ~7.5H, so seven would be needed for 50H, reducing the voltage accross each to less than 300V.
If GR can't find a 50H, 2000V choke he has options
EDIT: I believe Steve Connor used four in series for his resonant charging SGTC, which ran off two rectified MOT's at 10kV, each choke had 2.5kV accross it with no problems, although they are only rated for around 500V.
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50 Henry inductor for 2000v
Or between layers, or between the inductor terminals, or isolation between inductor and case?
