EEVblog Electronics Community Forum

General => General Technical Chat => Topic started by: xzswq21 on July 28, 2021, 11:03:09 am

Title: Small flyback transformer
Post by: xzswq21 on July 28, 2021, 11:03:09 am
Hello, I've been looking for a transformer manufacturer to build a few small ac flyback transformer for me, the input is 12v, 30KHz and the output is 10Kv and 1mA,

The smallest the better,

the transformer should be around:
LxWxH=32x26x24 mm
(https://www.eevblog.com/forum/chat/small-flyback-transformer/?action=dlattach;attach=1240001)

No need to have a high voltage diode.

in the first step I want to order a few prototypes and the second step I need to have some hundreds of the transformer in mass production.
Thanks

Title: Re: Small flyback transformer
Post by: Zero999 on July 28, 2021, 02:54:53 pm
I don't know. My advice would be to look for new old stock CRT transformers. I doubt they still make them.

Another option might be an ignition transformer.
Title: Re: Small flyback transformer
Post by: jonpaul on July 28, 2021, 05:02:20 pm
Bonjour, we made amny 10,000s of similar decades ago.

these require vacuum varnish impreg or encapsulation as shown.

Due to setup and yield,  custom potting shell   MOQ will be many 1000s ...10,000s.

For protos or a few hundred, suggest to find a stock part eg CRT/scope/old TV replacement FB and adapt to use.

Bon chance,




Jon

Title: Re: Small flyback transformer
Post by: xzswq21 on July 28, 2021, 06:04:00 pm
I don't know. My advice would be to look for new old stock CRT transformers. I doubt they still make them.
Another option might be an ignition transformer.
I've looked at them before on ebay, I didn't find an interesting option.
The transformer should be AC, I don't need a high voltage diode at the inside of the transformer, plus their primary inductors are useless bcoz they were made for old CRT TV :) as I want to produce many different types of High voltage device it's better to find a transformer manufacturer.
Title: Re: Small flyback transformer
Post by: daqq on July 28, 2021, 06:17:39 pm
Try contacting these guys, they can make all kinds of strange and wonderful wound and potted devices/transformers:

https://pvelektronic.com/en/products/potted-parts/

Not gonna claim you can get exactly that, but who knows.

Title: Re: Small flyback transformer
Post by: NiHaoMike on July 29, 2021, 01:57:18 am
Maybe take a look at automotive ignition transformers?
Title: Re: Small flyback transformer
Post by: LaserSteve on July 29, 2021, 03:19:38 am
A company in the US,  "Information Unlimited " still has flybacks for sale. YmMV.

Steve
Title: Re: Small flyback transformer
Post by: james_s on July 29, 2021, 04:21:30 am
There are companies still making HV transformers. They're used for CO2 lasers, ozone generators, electronic air filters, and various other devices. There are also companies still making replacement flyback transformers for arcade monitors.
Title: Re: Small flyback transformer
Post by: xzswq21 on July 30, 2021, 06:03:22 pm
A company in the US,  "Information Unlimited " still has flybacks for sale. YmMV.

Steve
I couldn't open the website.
Title: Re: Small flyback transformer
Post by: LaserSteve on July 31, 2021, 04:59:32 am
I just had no problem opening the website.

S.