custom transformers from China

W

Winfield Hill

Guest
There are custom transformer companies in China,
with their pages on AliExpress, seeking orders
for making custom transformers. Pick from their
standard frame types and sizes, fill out a form,
maybe get a quote first, or not, place an order.

Some seem very experienced, highly-skilled and
competent, such as Ranlo.

Has anyone had experience doing such a thing?
In the old days I ordered custom transformers
from companies near by, I could go talk with
them, but they've mostly all dissapeared.


--
Thanks,
- Win
 
DecadentLinuxUserNumeroUno@decadence.org wrote...
Winfield Hill <winfieldhill@yahoo.com> wrote in
news:qjluck020gb@drn.newsguy.com:

There are custom transformer companies in China,
with their pages on AliExpress, seeking orders
for making custom transformers. Pick from their
standard frame types and sizes, fill out a form,
maybe get a quote first, or not, place an order.

Some seem very experienced, highly-skilled and
competent, such as Ranlo.

Has anyone had experience doing such a thing?
In the old days I ordered custom transformers
from companies near by, I could go talk with
them, but they've mostly all dissapeared.

Just be sure to spec the winding to winding isolation requisite.
After that, it is up to the engineer to get the volts per turn right
and other characteristics of his or her particular application.
Click to expand...

They do that, right?

Vacuum impregnation does not always take care of some of those.

But yeah... these are folks that likely spin them up 24/7/365 for
years. Way more experienced than me and I did it for a while
(miniature, hf, ferrite core stuff).

I even had one design with six 300 turn each secondary segments
that was about as big as the top 6mm of a pack of cigarettes. Had to
carefully place the turns on each of those 300 turn segments, which
were only about 3mm wide each. I think it was #43 wire. So fragile.

After the multiplier though we made 15kV from a 9V battery down to
when the thing is barely making 7 volts. on the input side.

It also shut off at about 11uA (human contact specs).

The main efficiency component of the entire supply was the 10mm
diameter 5 turn inductor feeding the main oscillator. It halted any
hard starts and made the Zetex purr. It was a really nice supply and
about 6 of them would fit into a cig pack. It had a little 25 x 25 x
8 mm potting box over the multiplier section.

I spent two years developing several customer spec changes and
iterations. Then I think they dumped us, planning to have a chinese
maker build our design.

Because they wanted them for 6 bucks each. Nice try.

And then I think they never made the product they were supposed to
go into.
Click to expand...

Thanks for the stories and advice.


--
Thanks,
- Win
 
Winfield Hill <winfieldhill@yahoo.com> wrote in
news:qjluck020gb@drn.newsguy.com:

There are custom transformer companies in China,
with their pages on AliExpress, seeking orders
for making custom transformers. Pick from their
standard frame types and sizes, fill out a form,
maybe get a quote first, or not, place an order.

Some seem very experienced, highly-skilled and
competent, such as Ranlo.

Has anyone had experience doing such a thing?
In the old days I ordered custom transformers
from companies near by, I could go talk with
them, but they've mostly all dissapeared.
Click to expand...

Just be sure to spec the winding to winding isolation requisite.
After that, it is up to the engineer to get the volts per turn right
and other characteristics of his or her particular application.

Vacuum impregnation does not always take care of some of those.

But yeah... these are folks that likely spin them up 24/7/365 for
years. Way more experienced than me and I did it for a while
(miniature, hf, ferrite core stuff).

I even had one design with six 300 turn each secondary segments
that was about as big as the top 6mm of a pack of cigarettes. Had to
carefully place the turns on each of those 300 turn segments, which
were only about 3mm wide each. I think it was #43 wire. So fragile.

After the multiplier though we made 15kV from a 9V battery down to
when the thing is barely making 7 volts. on the input side.

It also shut off at about 11uA (human contact specs).

The main efficiency component of the entire supply was the 10mm
diameter 5 turn inductor feeding the main oscillator. It halted any
hard starts and made the Zetex purr. It was a really nice supply and
about 6 of them would fit into a cig pack. It had a little 25 x 25 x
8 mm potting box over the multiplier section.

I spent two years developing several customer spec changes and
iterations. Then I think they dumped us, planning to have a chinese
maker build our design.

Because they wanted them for 6 bucks each. Nice try.

And then I think they never made the product they were supposed to
go into.
 
On Thu, 22 Aug 2019 07:27:30 -0700, jlarkin@highlandsniptechnology.com
wrote:

On 22 Aug 2019 04:30:28 -0700, Winfield Hill <winfieldhill@yahoo.com
wrote:

There are custom transformer companies in China,
with their pages on AliExpress, seeking orders
for making custom transformers. Pick from their
standard frame types and sizes, fill out a form,
maybe get a quote first, or not, place an order.

Some seem very experienced, highly-skilled and
competent, such as Ranlo.

Has anyone had experience doing such a thing?
In the old days I ordered custom transformers
from companies near by, I could go talk with
them, but they've mostly all dissapeared.

Do they do toroids? I need a big power toroid.
Click to expand...

No, just checked, looks like HF ferrites.
 
On 22 Aug 2019 04:30:28 -0700, Winfield Hill <winfieldhill@yahoo.com>
wrote:

There are custom transformer companies in China,
with their pages on AliExpress, seeking orders
for making custom transformers. Pick from their
standard frame types and sizes, fill out a form,
maybe get a quote first, or not, place an order.

Some seem very experienced, highly-skilled and
competent, such as Ranlo.

Has anyone had experience doing such a thing?
In the old days I ordered custom transformers
from companies near by, I could go talk with
them, but they've mostly all dissapeared.
Click to expand...

Do they do toroids? I need a big power toroid.
 
On 2019-08-22 16:27, jlarkin@highlandsniptechnology.com wrote:
On 22 Aug 2019 04:30:28 -0700, Winfield Hill <winfieldhill@yahoo.com
wrote:

There are custom transformer companies in China,
with their pages on AliExpress, seeking orders
for making custom transformers. Pick from their
standard frame types and sizes, fill out a form,
maybe get a quote first, or not, place an order.

Some seem very experienced, highly-skilled and
competent, such as Ranlo.

Has anyone had experience doing such a thing?
In the old days I ordered custom transformers
from companies near by, I could go talk with
them, but they've mostly all dissapeared.

Do they do toroids? I need a big power toroid.
Click to expand...

This is my preferred supplier for > 25 years:
https://www.amplimo.nl/en/
UL, CSA, CE etc marking (_real_, tested).
Good support, they compute everything according your spec.
Almost standard price for 25+ custom pieces.

Arie de Muijnck
 
jlarkin@highlandsniptechnology.com wrote...
On Thu, 22 Aug 2019 07:27:30 -0700, jlarkin@highlandsniptechnology.com
wrote:

On 22 Aug 2019 04:30:28 -0700, Winfield Hill <winfieldhill@yahoo.com
wrote:

There are custom transformer companies in China,
with their pages on AliExpress, seeking orders
for making custom transformers. Pick from their
standard frame types and sizes, fill out a form,
maybe get a quote first, or not, place an order.

Some seem very experienced, highly-skilled and
competent, such as Ranlo.

Has anyone had experience doing such a thing?
In the old days I ordered custom transformers
from companies near by, I could go talk with
them, but they've mostly all dissapeared.

Do they do toroids? I need a big power toroid.

No, just checked, looks like HF ferrites.
Click to expand...

They show pictures of toroids for sale, and I
think they only sell stuff they make themselves.


--
Thanks,
- Win
 
On Thu, 22 Aug 2019 17:34:12 +0200, Arie de Muynck
<no.spam@no.spam.org> wrote:

On 2019-08-22 16:27, jlarkin@highlandsniptechnology.com wrote:
On 22 Aug 2019 04:30:28 -0700, Winfield Hill <winfieldhill@yahoo.com
wrote:

There are custom transformer companies in China,
with their pages on AliExpress, seeking orders
for making custom transformers. Pick from their
standard frame types and sizes, fill out a form,
maybe get a quote first, or not, place an order.

Some seem very experienced, highly-skilled and
competent, such as Ranlo.

Has anyone had experience doing such a thing?
In the old days I ordered custom transformers
from companies near by, I could go talk with
them, but they've mostly all dissapeared.

Do they do toroids? I need a big power toroid.


This is my preferred supplier for > 25 years:
https://www.amplimo.nl/en/
UL, CSA, CE etc marking (_real_, tested).
Good support, they compute everything according your spec.
Almost standard price for 25+ custom pieces.

Arie de Muijnck
Click to expand...

We have been using Chinese manufacturers of small-ish auxiliary power
supply transformers for many years and they are great so far. We
usually need ones that can legally place a UR mark on them though for
use in our listed products. Usually we will use our Chinese
connection for stuff like that but have used ICE Components for
example.


Used to have these made near by too in the 1970s til mid 1990s.

Had large-ish 3,4,5 kW 60Hz transformers made in Thailand and shipped
in our aluminum castings which worked well. Shipping was by volume
and not weight.

A lot of the US manufacturers build in China and other countries these
days like Triad I think.

Large-ish inductors we build ourselves because there hasn't seemed to
be a cost benefit lately.
 
On Thu, 22 Aug 2019 07:30:54 -0700, jlarkin@highlandsniptechnology.com
wrote:

On Thu, 22 Aug 2019 07:27:30 -0700, jlarkin@highlandsniptechnology.com
wrote:

On 22 Aug 2019 04:30:28 -0700, Winfield Hill <winfieldhill@yahoo.com
wrote:

There are custom transformer companies in China,
with their pages on AliExpress, seeking orders
for making custom transformers. Pick from their
standard frame types and sizes, fill out a form,
maybe get a quote first, or not, place an order.

Some seem very experienced, highly-skilled and
competent, such as Ranlo.

Has anyone had experience doing such a thing?
In the old days I ordered custom transformers
from companies near by, I could go talk with
them, but they've mostly all dissapeared.

Do they do toroids? I need a big power toroid.

No, just checked, looks like HF ferrites.
Click to expand...

Bob mentioned Triad, They to power Toriods, including Medical BTW.

Cheers
 
On 22/08/2019 12:30, Winfield Hill wrote:
There are custom transformer companies in China,
with their pages on AliExpress, seeking orders
for making custom transformers. Pick from their
standard frame types and sizes, fill out a form,
maybe get a quote first, or not, place an order.
Click to expand...

<snip>

Unfortunately Win, your president has "...hereby ordered..." you to
"...immediately start looking for an alternative to China...", so you're
gonna have to get winding.

Cheers
--
Clive
 
On Sat, 24 Aug 2019 11:08:47 +0100, Clive Arthur
<cliveta@nowaytoday.co.uk> wrote:

On 22/08/2019 12:30, Winfield Hill wrote:
There are custom transformer companies in China,
with their pages on AliExpress, seeking orders
for making custom transformers. Pick from their
standard frame types and sizes, fill out a form,
maybe get a quote first, or not, place an order.

snip

Unfortunately Win, your president has "...hereby ordered..." you to
"...immediately start looking for an alternative to China...", so you're
gonna have to get winding.

Cheers
Click to expand...

Due to the unpredictable US president, for more than two years, I have
tried to avoid US made components or subsystems due to the political
risks involved with the trade with the USA.

I would not at all be surprised, if he next week decides ban deliver
of certain products to Europe :).
 
On Saturday, August 24, 2019 at 8:08:54 PM UTC+10, Clive Arthur wrote:
On 22/08/2019 12:30, Winfield Hill wrote:
There are custom transformer companies in China,
with their pages on AliExpress, seeking orders
for making custom transformers. Pick from their
standard frame types and sizes, fill out a form,
maybe get a quote first, or not, place an order.

snip

Unfortunately Win, your president has "...hereby ordered..." you to
"...immediately start looking for an alternative to China...", so you're
gonna have to get winding.
Click to expand...

Or get a president with a bit more sense.

--
Bill Sloman, Sydney
 
upsidedown@downunder.com wrote...
I would not at all be surprised, if he next
week decides ban deliver of certain products
to Europe :).
Click to expand...

I worry that he's beginning to get a real
taste for this "hereby I order ..." thing.


--
Thanks,
- Win
 
On 2019-08-24 14:06, Winfield Hill wrote:
Arie de Muynck wrote...

This is my preferred supplier for > 25 years:
https://www.amplimo.nl/en/
UL, CSA, CE etc marking (_real_, tested).

I was delighted to discover standard transformers,
with part numbers, for 400V to 230V. Ideal for
going from your PFC bulk capacitor to various HV
supply voltages (compare to everybody else going
only to 48V or lower). But I was disappointed to
see no further info available: package, price, etc.
Click to expand...

They do have a web-outlet http://www.toroidal-transformer.com/

An example with with pricing:
https://www.toroidal-transformer.com/shop/toroidal-transformers/500va.html

They are very friendly when asked for info, pricing, etc.

Arie
 
Arie de Muynck wrote...
This is my preferred supplier for > 25 years:
https://www.amplimo.nl/en/
UL, CSA, CE etc marking (_real_, tested).
Click to expand...

I was delighted to discover standard transformers,
with part numbers, for 400V to 230V. Ideal for
going from your PFC bulk capacitor to various HV
supply voltages (compare to everybody else going
only to 48V or lower). But I was disappointed to
see no further info available: package, price, etc.


--
Thanks,
- Win
 
Clive Arthur <cliveta@nowaytoday.co.uk> wrote in
news:qjr2bh$i5k$1@dont-email.me:

On 22/08/2019 12:30, Winfield Hill wrote:
There are custom transformer companies in China,
with their pages on AliExpress, seeking orders
for making custom transformers. Pick from their
standard frame types and sizes, fill out a form,
maybe get a quote first, or not, place an order.

snip

Unfortunately Win, your president has "...hereby ordered..." you
to "...immediately start looking for an alternative to China...",
so you're gonna have to get winding.

Cheers
Click to expand...

I'd like to wind up a railgun to try out... on it...

That sub-human idiot fucking everything up.
 
On 24 Aug 2019 05:09:04 -0700, Winfield Hill <winfieldhill@yahoo.com>
wrote:

upsidedown@downunder.com wrote...

I would not at all be surprised, if he next
week decides ban deliver of certain products
to Europe :).

I worry that he's beginning to get a real
taste for this "hereby I order ..." thing.
Click to expand...

These days children suffering from ADHD will get a proper diagnosis
and treatment.

Unfortunately in the last century this was not the case.
 
On 8/24/2019 9:14 AM, DecadentLinuxUserNumeroUno@decadence.org wrote:
Clive Arthur <cliveta@nowaytoday.co.uk> wrote in
news:qjr2bh$i5k$1@dont-email.me:

On 22/08/2019 12:30, Winfield Hill wrote:
There are custom transformer companies in China,
with their pages on AliExpress, seeking orders
for making custom transformers. Pick from their
standard frame types and sizes, fill out a form,
maybe get a quote first, or not, place an order.

snip

Unfortunately Win, your president has "...hereby ordered..." you
to "...immediately start looking for an alternative to China...",
so you're gonna have to get winding.

Cheers

I'd like to wind up a railgun to try out... on it...

That sub-human idiot fucking everything up.
Click to expand...

Which sub-human idiot, DecadentLinuxUserNumeroUnoTard?
 
On 24 Aug 2019 05:09:04 -0700, Winfield Hill <winfieldhill@yahoo.com>
wrote:

upsidedown@downunder.com wrote...

I would not at all be surprised, if he next
week decides ban deliver of certain products
to Europe :).

I worry that he's beginning to get a real
taste for this "hereby I order ..." thing.
Click to expand...

He is doing international diplomacy the way he did Manhattan real
estate.
 
On Sat, 24 Aug 2019 11:08:47 +0100, Clive Arthur
<cliveta@nowaytoday.co.uk> wrote:

On 22/08/2019 12:30, Winfield Hill wrote:
There are custom transformer companies in China,
with their pages on AliExpress, seeking orders
for making custom transformers. Pick from their
standard frame types and sizes, fill out a form,
maybe get a quote first, or not, place an order.

snip

Unfortunately Win, your president has "...hereby ordered..." you to
"...immediately start looking for an alternative to China...", so you're
gonna have to get winding.

Cheers
Click to expand...

For some reason, India seems good at magnetics too.
 
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