AN ELECTRIC FENCE ENERGISER

摘要

An energy-efficient energiser for an electric fence for controlling livestock or the like, includes output voltage sensing means. By switching to extra storage capacitance and/or altering the charge voltage the energiser varies the duration of the output pulse and perhaps also the pulse voltage according to the sensed output, thus maintaining an effective livestock barrier and consuming high power only when required. Output pulses are about 8 kV (no load) down to 4 kV (wide range of loads). The control algorithm determines the capacitor charging time and initiates a charge sooner if a higher power pulse is to be delivered, so maintaining a constant pulse rate. The energiser includes a 12V DC power option and has a circuit for synthesising a substantially unipolar pulse having low harmonic content.