AU2012101438A4 - Daken Electric Fence Energiser - Google Patents

Abstract

DAKEN ELECTRIC FENCE ENERGISER The Daken Electric Fence Energisers output a pulse of up to 10kV once every second. The output voltages and timing must be certified according to the standards. The idea behind the timing is that one second is enough time for an animal to move away from an electric fence after receiving an electric shock. Daken Electric Fence Energisers have two LEDs (light emitting diodes), a green LED which flashes to indicate the pulse and a red LED which will flash when there is an overload condition or short circuit on the output of the energiser. A Neon light on the output will flash when there is high voltage on the fence wires and will not flash when there is a short or low resistance on the fence wires. DAKEN ELECTRIC FENCE ENERGISER - DRAWING INPUT 240V AC OR 12V D HIGH VOLTAGE OUTPUT CAPACITOR TRANSFORMER OUTPUT OUTPUT MICRO- HIGH VOLTAGE CONTROLLER SWITCH Figure 1 - Daken Electric Fence Energiser Diagram

Description

AUSTRALIA Patents Act 1990 COMPLETE SPECIFICATION INNOVATION PATENT DAKEN ELECTRIC FENCE ENERGISER The following statement is a full description of this invention, including the best method of performing it known to me: 1 DAKEN ELECTRIC FENCE ENERGISER SPECIFICATION DESCRIPTION On farms and other agricultural sites, there is a need for more effective Electric Fences. Electric Fences consist of an Energiser which may be powered from 240V AC Mains, a 12V battery or both, and insulated wire which spans the length of the fence. Current Electric Fences Energisers are typically analog circuits, and have a single output light which illuminates once a second when the output becomes energised. It is common for the insulated wires of an electric fence to become a short circuit for a number of reasons, and typical Electric Fence Energisers will not detect this. The Daken Electric Fence Energisers are designed to have a Neon and current limiting resistor on the output and this Neon will normally flash once per second when the Energiser is operating normally. When the electric fence becomes shorted, the Neon no longer flashes and the operator can then detect from looking at the Neon that there is a problem with the electric fence. The Daken Electric Fence Energisers also contain a small reprogrammable microcontroller which can measure the output load by measuring the transformer flyback pulse, display this load on a numerical display, and turn on an output which can then sound a siren or illuminate a light. Internally, the Daken Electric Fence Energisers work by generating a high voltage DC level across a capacitor and then pulsing this through a step-up transformer. The Energy in the capacitor can be calculated using the formula E = % C V 2 and the output energy can be measured by recording the output voltage pulse and the resistive load. After power off, the stored energy and voltage across the capacitor can take up to 30 minutes to dissipate to a safe level. This can pose a risk to service and repair personnel, so a method has been devised to reduce this voltage automatically when the energiser is powered off. Battery power energisers have a very low current drain from a 12V battery. To lengthen the battery life, high capacity Zinc-Air batteries may be used which have over ten times the capacity of standard SLA (Sealed-Lead Acid) and Gel batteries which are currently being used.

Claims (4)

1. 2. A method of determining the output load in Ohms by measuring the voltage of the transformer flyback pulse.
2. 3. A circuit consisting of a resistor and a light emitting diode (LED) to discharge the internal high voltage DC voltage.
3. 4. A connector to provide an output to drive a siren, beeper or alarm in the case of a fault on the electric fence
4. 5. Using a high capacity Zinc-Air battery to power a battery Electric Fence Energiser.