- Tue Oct 29, 2019 9:32 pm
#84356
All AC powered fence energizers use capacitor voltage multiplier to charge up a the pulse capacitor. A SCR is triggered to discharge the pulse capacitor into the primary winding of the output transformer. The output transformer steps up the voltage from the primary. The high voltage output pulse of the fencer is isolated from the AC line. One side of the output transformer is wired to a ground rod, the other side of the transformer output is connected to the fence.
The sense loop that I described above was only used as a low power signal for the monitoring circuit. A wire routed through one of the corner holes in the transformer gave us enough signal. The output of the transformer is a short duration pulse. The wire through the transformer was a single turn secondary winding. Because the output of the transformer is a pulse, and not a symmetrical output, only one end of the sense loop can be connected to the rectifier. If the other wire were used, there would be little output voltage to rectify and filter.
The sense loop that I described above was only used as a low power signal for the monitoring circuit. A wire routed through one of the corner holes in the transformer gave us enough signal. The output of the transformer is a short duration pulse. The wire through the transformer was a single turn secondary winding. Because the output of the transformer is a pulse, and not a symmetrical output, only one end of the sense loop can be connected to the rectifier. If the other wire were used, there would be little output voltage to rectify and filter.
