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4hv.org :: Forums :: High Voltage
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In Need of 30kV DC 200+ watts flyback transformers

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Robert Francis
Thu Nov 23 2017, 12:09AM Print
Robert Francis Registered Member #2355 Joined: Thu Sept 10 2009, 09:12PM
Location:
Posts: 71
 		Hi I am in need of four 30kV DC flyback transformers. Preferably 200 watts or greater.

Does anyone on the board know a person or company I could contact to procure these parts?
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Justin
Thu Nov 23 2017, 03:36AM
Justin Registered Member #46164 Joined: Wed May 07 2014, 08:16AM
Location: California, USA
Posts: 89
 		Maybe try laser flyback transformers on Aliexpress.
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Sulaiman
Thu Nov 23 2017, 06:35AM
Sulaiman Registered Member #162 Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
 		I can sell 1 to 9 of these Link2
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Robert Francis
Thu Nov 23 2017, 03:45PM
Robert Francis Registered Member #2355 Joined: Thu Sept 10 2009, 09:12PM
Location:
Posts: 71
 		What kind of specs are on those flybacks?

I was able to get 30kV 200 watt AC flybacks from a guy named Yuri in China but that was a long time ago and he hasn't responded to my email.

The laser flybacks I have seen on Aliexpress have too little wattage. I am using the flybacks to charge up a Marx generator, 390kV+ to 390kV-
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Sulaiman
Thu Nov 23 2017, 04:45PM
Sulaiman Registered Member #162 Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
 		They are 35 kV rated,
I do not know the current rating but a modest 3 mA would give 100 W per flyback transformer.
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Patrick
Fri Nov 24 2017, 09:27PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
 		Robert Francis,

You should look at my previous work if your wanting reliable 200-300 watt output at 30-50kv. once you get above 20kv and 2 or 3 ma things get harder.

Link2 HV Flyback Bench Top Power Supply for Lab.

Link2 Microcontroller Timed Flyback

Link2 Pulse Frequency Modulated (PFM) Flyback Transformer.


Ive gotten to 52kV and 200 watts, but watch out, dont expect efficiency of better than 60%. And continuous operation under oil of a potato sized flybacks eludes me. Your transistors will get flaming hot from that air gap in the core.
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Justin
Sat Nov 25 2017, 11:57AM
Justin Registered Member #46164 Joined: Wed May 07 2014, 08:16AM
Location: California, USA
Posts: 89
Robert Francis wrote ...

What kind of specs are on those flybacks?

I was able to get 30kV 200 watt AC flybacks from a guy named Yuri in China but that was a long time ago and he hasn't responded to my email.

The laser flybacks I have seen on Aliexpress have too little wattage. I am using the flybacks to charge up a Marx generator, 390kV+ to 390kV-


The rating provided is for the laser tube to be driven, not what the transformer delivers.
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Robert Francis
Tue Nov 28 2017, 02:51PM
Robert Francis Registered Member #2355 Joined: Thu Sept 10 2009, 09:12PM
Location:
Posts: 71
 		Thanks for your help guys, Yuri got back to me, I have ordered from him in the past so I will again now.
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alan sailer
Wed Dec 13 2017, 11:51PM
alan sailer Registered Member #59110 Joined: Mon Apr 11 2016, 04:35PM
Location: Camarillo, California
Posts: 74
 		Robert,

Does Yuri sell AC HV flybacks? If you can forward his contact information I can ask myself...

Cheers.
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Ash Small
Thu Dec 28 2017, 02:49AM
Ash Small Registered Member #3414 Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
 		1969 Panasonic was 36kV, and RCA did one as well. There is a company that supplies replacements, something like Van Diemen.

EDIT: May have been Hitachi, my memory isn't what it was.

Link2

Link to H R Diemen
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