Electric fence Energiser

[RodneyB]

I would like to make an electric fence energiser. I am aware of all the laws pertaining to the electric fences in Zimbabwe.

If my understanding is correct a energiser consists of an oscillator which induces a high voltage, with very little current in an HT transformer. This is then pulsed down the fence.

The system is a closed loop which if cut activates an alarm, or if shorted to earth activates an alarm.

A battery,12 Volt, runs the system. So would need a charger.

The questions in this are.

1. Is this an accurate assumption of how an electric fence energiser works.
2. Does anyone have a circuit diagram or circuit diagrams of either a completed electric fence energiser or the individual circuits that could be used to make up an electric fence energiser.

Many thanks

Rodney

 

[dougy83]

Standard electric fences don't test for wire cut or shorted, though I guess this could be something new.

Here's one controller, published in Silicon Chip magazine: https://www.electro-tech-online.com/custompdfs/2013/03/Electric_Fence.pdf
I think there's an improved version as well somewhere. It boosts the 12V input up to a higher voltage stored in a 7uF capacitor. It then dumps the energy from that capacitor into the fence through a step-up transformer for every pulse on the fence.

 

[RodneyB]

Thank you I will make this energiser and then build from there. Thank you very much

 

[jpanhalt]

Hi Rodney,

Here's an old thread that addressed the problem of broken or grounded wires. The concern is this case was primarily to know whether the fence had been intentionally cut or grounded. The idea to use two returns, one a ground and the other a closed loop in the fence may have merit.

https://www.electro-tech-online.com/threads/broken-wire-detection.35046/

And a couple of threads with charger circuits (one of the circuits appears to be a duplicate of the one above):

https://www.electro-tech-online.com/threads/electric-fence-charger-of-100mj.98247/

https://www.electro-tech-online.com...loping-an-electric-fencing-for-my-farm.13848/ (posts #2 and #18)


John