Electricity: electrical systems and devices – Electric charge generating or conducting means – For application to living beings
Patent
1992-09-09
1995-01-10
Gaffin, Jeffrey A.
Electricity: electrical systems and devices
Electric charge generating or conducting means
For application to living beings
307108, H05C 104
Patent
active
053812980
ABSTRACT:
The invention provides an electric fence charger of the type that periodically provides high voltage electrical shock pulses through an electric fence wire. The fence charger has a low voltage power source that powers the fence charger and supplies a charging current. An energy converter converts the low voltage and charging current of the power source to high voltage for storage in a high voltage storage means. A timer emits pulse discharge control signals on a periodic basis and these control signals are used to control discharge of the stored high voltage for delivering shocking pulses into the fence wire. A regulator adjusts operation of the energy converter to provide a minimum high voltage energy level as long as the power source voltage exceeds an established power source voltage reference. In another embodiment of the invention, a fence charger employs a DC-DC flyback converter for charging a high voltage storage means to a discharge voltage level which provides a minimum shock energy pulse. This embodiment includes means for operating the flyback converter at a constant frequency and means responsive to battery voltage for changing the flyback converter duty cycle to regulate the discharge voltage level.
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Shaw David L.
Wyatt Gerald D.
Gaffin Jeffrey A.
Waters Instruments Inc.
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