High Voltage Forum

High voltage => Transformer (ferrite core) => Topic started by: AlexanderHun on September 14, 2019, 05:05:00 PM

Title: Homemade HV transformer
Post by: AlexanderHun on September 14, 2019, 05:05:00 PM
Hello!

I would like to ask you, who has made several high voltage transformers here? I was experimenting with television flyback transformers, it could produce a piece of 30kV. They can be connected in series but I want to make my own, my goal is at least 60kV. Do you think this is possible? Included are two forms of what ferrite core I found, so I should design a secondary one.

(https://i.postimg.cc/XXfg6SBy/f1.jpg) (https://postimg.cc/XXfg6SBy)
(https://i.postimg.cc/vxsk8rv7/f2.jpg) (https://postimg.cc/vxsk8rv7)

I drive with this switch ..

https://cdn.instructables.com/FSW/2MIC/GNBEVVKF/FSW2MICGNBEVVKF.LARGE.jpg?auto=webp&&frame=1 (https://cdn.instructables.com/FSW/2MIC/GNBEVVKF/FSW2MICGNBEVVKF.LARGE.jpg?auto=webp&&frame=1)

I have a 3d printer, I could print what I need, but unfortunately I haven't designed one yet. I will need to drive an X-ray tube, then I want to apply a voltage multiplier.


Title: Re: Homemade HV transformer
Post by: ritaismyconscience on September 14, 2019, 06:35:32 PM
https://highvoltageforum.net/index.php?topic=390.0 (https://highvoltageforum.net/index.php?topic=390.0)

consider making a bobbin
Title: Re: Homemade HV transformer
Post by: AlexanderHun on September 14, 2019, 06:43:15 PM
Thanks! I don't see any specific electrical voltage, nor is it written by any person who built one. Do they measure voltage? I see a 14-20kV post, but it is very little for me
Title: Re: Homemade HV transformer
Post by: ElectroXa on September 14, 2019, 07:01:28 PM
Hi  :)

what core is in the picture ?
I have the same project, but with a lower voltage (20kV)

I suggest for the bobbin a milled HDPE cylinder because 3d printed coils have air bubble, so partial discharges can occur

cheers
Title: Re: Homemade HV transformer
Post by: AlexanderHun on September 15, 2019, 10:39:29 AM
Thanks for the help! I have a dental X-ray and I want to operate an X-ray tube. The question is how much tension to multiply, what do I manage to produce for myself.

Philips oralix dental x-ray head:
(https://i.postimg.cc/ppsHzgmn/20190810-131709.jpg) (https://postimg.cc/ppsHzgmn)

I usually do X-ray fluoroscopy videos, this is my own:

https://www.youtube.com/watch?v=3kqrlqLzQrE (https://www.youtube.com/watch?v=3kqrlqLzQrE)


The tube I want to operate requires 60kV:   (I'd like to operate this tube)

(https://i.postimg.cc/pphZJjTY/cs3.jpg) (https://postimg.cc/pphZJjTY)

This is a "siemens röntgenkugel" x-ray tube

(https://i.postimg.cc/v1rMgDfG/ER10.jpg) (https://postimg.cc/v1rMgDfG)


Title: Re: Homemade HV transformer
Post by: davekni on September 16, 2019, 02:36:17 AM
Presuming you need 60V DC, it's probably easier to use a somewhat-lower-voltage transformer and a voltage multiplier.  For my Marx generator, I wound a +-11kV transformer followed by a voltage multiplier to get +-22kV DC