HV xformer for fence energizer
HV xformer for fence energizer
(OP)
Hi all,
I'm looking for High Voltage transformer suppliers for fence energizers. I mean the standard step-up transformer whose secondary wires are connected to the fence and earth.
This is close to what I'm looking for:
www.mulehollow.com/retr.html
Thanks in advance for any help!
I'm looking for High Voltage transformer suppliers for fence energizers. I mean the standard step-up transformer whose secondary wires are connected to the fence and earth.
This is close to what I'm looking for:
www.mulehollow.com/retr.html
Thanks in advance for any help!





RE: HV xformer for fence energizer
I'm confused because most transformer manufacturers I've found, ask for standard parameters hard to find from this application.
As many of you already know, most fence energizers shunt a charged capacitor to ground through the transformer primary and a switch. The secondary must whithstand some 6-10KV on a 500ohm load, for less than 1ms, while total released energy must be under 3-5J for safety reasons.
How to translate Joules, seconds and peak voltages to VRms, Amps and VAs, as expected by most manufacturers?
Thanks in advance.
RE: HV xformer for fence energizer
RE: HV xformer for fence energizer
Not sure if those comply with safety regulations
RE: HV xformer for fence energizer
ignition coil and a vibrator (some of you are
problably not old enough to remember those).
Worked reasonably well; the old ignition coils
output 10-15 kv. Newer coils will probably be
in the 50 kv range. I tinkered also with some
made from HV transformers from old TV's. These
also worked, but not as well. No decent current :)
Nowadays, I probably would try a coil from a
small one-cylinder engine and a simple
transistor oscillator. Should work. Non-lethal.
There is a circuit at:
http://hm
of a fence controller; also some other HV supplies
that may furnish ideas.
<als>
RE: HV xformer for fence energizer
Ignition xformers are a little expensive for production runs, but it's a good idea for prototypes and Lab testing.
Thanks!
RE: HV xformer for fence energizer
Both transformers are cast in epoxy resin inside a plastic enclosure. The outer winding (thin wire) is divided in 8 cascaded sections, with plastic separators between them.
Hope to post some pictures soon -It should help more.
I'd appreciate any info on suppliers of these parts.
Thanks.
RE: HV xformer for fence energizer
The transformers cast in epoxy sound like spark generators for gas cookers/central heating boilers.
Harry
www.tynevalleyplastics.co.uk
RE: HV xformer for fence energizer
Some measurements:
Voltage ratio ~1:10 (step-up)
Primary inductance: 300uH
Primary leakage inductance: 30uH
Measured Secondary inductance: 33mH
If you know some supplier of these parts, please let me know.
Cheers,
Gonzalo
RE: HV xformer for fence energizer
Hope it helps.
RE: HV xformer for fence energizer
That's what I was taught to do and have done it several times with good results.
Keith Cress
kcress - http://www.flaminsystems.com
RE: HV xformer for fence energizer
I wrote to 'Company A' and their quote was very costly (NRE charges, etc.) and long lead times; I guess that's the polite way to say 'No, thanks'.
Then we shipped a sample for 'Company B' (abroad) and didn't hear from them for days. I'm starting to think of our emails buried in a recycle bin, and pieces of our sample travelling into a trash truck.
Thanks!
RE: HV xformer for fence energizer
Keith Cress
kcress - http://www.flaminsystems.com