WO1988010059A1 - Procede pour alimenter une cloture electrique et generateur d'impulsions permettant la mise en oeuvre du procede - Google Patents

Procede pour alimenter une cloture electrique et generateur d'impulsions permettant la mise en oeuvre du procede Download PDF

Info

Publication number
WO1988010059A1
WO1988010059A1 PCT/SE1988/000305 SE8800305W WO8810059A1 WO 1988010059 A1 WO1988010059 A1 WO 1988010059A1 SE 8800305 W SE8800305 W SE 8800305W WO 8810059 A1 WO8810059 A1 WO 8810059A1
Authority
WO
WIPO (PCT)
Prior art keywords
load
pulse
storage unit
charge storage
secondary winding
Prior art date
Application number
PCT/SE1988/000305
Other languages
English (en)
Inventor
Göran ALMHAGEN
Anders Lindmark
Original Assignee
Internationell Affärsutveckling I Bjärred Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Internationell Affärsutveckling I Bjärred Ab filed Critical Internationell Affärsutveckling I Bjärred Ab
Publication of WO1988010059A1 publication Critical patent/WO1988010059A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05C—ELECTRIC CIRCUITS OR APPARATUS SPECIALLY DESIGNED FOR USE IN EQUIPMENT FOR KILLING, STUNNING, OR GUIDING LIVING BEINGS
    • H05C1/00—Circuits or apparatus for generating electric shock effects
    • H05C1/04—Circuits or apparatus for generating electric shock effects providing pulse voltages

Definitions

  • the present invention relates to a method for feed ⁇ ing an electric fence by means of a rechargeable charge storage unit and a transformer having a primary winding through which the charge storage device is discharge- able, and a secondary winding to which the electric fence is connected.
  • the invention also relates to a pulse gene ⁇ rator for carrying out the method.
  • Pulse generators for electric fences may be connected to the mains or be battery- powered.
  • the demands that the user, the farmer, places on a pulse generator is that it should be reliable, maintenance-free and consume little energy in the case of a battery-powered pulse generator.
  • pulse generators According to regu- lations set by the authorities, pulse generators must not emit such current or voltage as may cause damage to people or be a fire hazard.
  • the pulse generator should have a high power output, also causing drying of growing grass which would otherwise bring about undesired ground contact.
  • the power output is however maximized, generally to 5 J at a load of 500 ohm, while a power limit below this load value is seldom set.
  • the object of the present invention is to provide a method for feeding an electric fence of the type stated in the introduction to this specification, and to a pulse generator for carrying out the method, the method and the pulse generator making it possible to produce a sufficient shock effect independently of the load of the pulse generator.
  • this object is achieved by determining the load on the secondary winding of the transformer for each pulse generated by the discharge of the charge storage unit, and by controlling the charge storage unit so as to supply additional energy to the same pulse if the load exceeds a predetermined load value.
  • the pulse generator being characterized by having a load detector arranged to determine the load on the secon ⁇ dary winding of the transformer for each pulse gene ⁇ rated therein by the discharge of the charge storage unit, and a trigger circuit controlled by the load detector and arranged to control the charge storage unit so as to supply additional energy to the same pulse if the load exceeds a predetermined load value.
  • the predetermined load value generally is 500 ohm.
  • the invention ensures automatic adjustment of the power output according to the load on the fence, more particularly in such a manner that the maximum power output stipulated by the authorities for the predetermined load value is emitted precisely at this predetermined load value, whereby the shock effect at the predetermined load value and at lower load values becomes sufficient while, at loads above the predetermined load value, the required shock effect is obtained by increasing the power output for each separate pulse.
  • the inventive concept yields a number of advan ⁇ tages, such as reduced power consumption and, thus, increased battery life in the case of a battery-powered pulse generator.
  • the change of the power output is readily adaptable to current regulations in different countries and also involves the advantage of extend ⁇ ing the life of the pulse generator.
  • the load on the secon ⁇ dary winding of the transformer is determined prefer ⁇ ably on the basis of the maximum value of the voltage of the pulse generated in the secondary winding, and the pulse is supplied with additional energy if the maximum value falls below a predetermined value.
  • the invention suitably to determine the load on the secondary winding of the transformer on the basis of the difference between the maximum value of the voltage of the pulse generated in the secondary winding and a value representing the current of the pulse at a corresponding point of time, the additional energy being supplied if said difference is negative.
  • the pulse generator more particularly has a load detector arranged to determine the load on the secondary winding of the transformer for each pulse generated therein by the discharge of the charge storage unit, and a trigger circuit controlled by the load detector and arranged to control the charge storage unit so as to supply additional energy to the same pulse if the load ex ⁇ ceeds a predetermined load value.
  • the load detector suitably comprises a voltage level detector for determining the load on the basis of the maximum value of the voltage of the pulse gene ⁇ rated in the secondary winding, the trigger circuit being arranged to control the charge storage unit so as to supply the additional energy to the same pulse if the maximum value falls below a predeter ⁇ mined value.
  • the transformer suitably has a sensing winding connected to the voltage level detector and producing a pulse proportional to the voltage of the pulse in the secondary winding.
  • the load detector further suitably has a current level detector producing an output signal proportional to the current of the pulse in the secondary winding, said load detector being arranged to determine the load on the basis of the difference between the out- put signal of the voltage level detector and the out ⁇ put signal of the current level detector, and the additional energy being supplied if said difference is negative.
  • the charge storage device may suitably comprise two or more capacitors which are dischargeable each by a thyristor switch, one of said capacitors giving rise to the pulse in the secondary winding when clos ⁇ ing the associated thyristor switch, and another of said capacitors giving rise to the supply of additional energy by the trigger circuit closing the associtated thyristor switch.
  • Fig. 1 is a circuit diagram for a conventional pulse generator for use in an electric fence.
  • Fig. 2 is a schematic diagram for a pulse generator according to the invention for use in an electric fence.
  • Fig. 3 illustrates an embodiment of the charge storage device in a pulse generator according to the invention for use in an electric fence.
  • Fig. 4 is a circuit dia ⁇ gram for a preferred embodiment of the load detector and the trigger circuit in a pulse generator accord ⁇ ing to the invention for use in an electric fence.
  • Fig. 5 shows an example of pulses from the pulse gene- rator according to the invention.
  • the conventional pulse generator shown in Fig. 1 for use in an electric fence consists of a charging unit 1 by means of which a capacitor 2 in a charge storage unit 3 can be charged. Via a thyristor 5 con ⁇ trolled by a trigger circuit 4, the capacitor 2 is repetitively dischargeable through the primary winding 7 of a transformer 6.
  • the secondary winding 8 of the transformer 6 is connected both to the wire 9 of the electric fence and to ground.
  • a voltage limiter (not shown) may be connected between the secon ⁇ dary winding 8 of the transformer 6 and the electric fence.
  • the charging unit 1 may be battery-powdered or connected to the mains and generally charges the capa ⁇ citor 2 to a voltage of about 600 V.
  • the trigger cir ⁇ cuit 4 supplies ignition pulses to the thyristor 5 at a predetermined repetition frequency, e.g. at time intervals of about 1 s.
  • the amount of energy supplied by the conventional pulse generator is constant and independent of the load of . the electric fence on the transformer 6. If the load is high, i.e. the resistance between the electric fence wire and the ground is low, there is thus obtained a pulse of relatively low voltage on the fence wire while, when the load is low, the pulse will have comparatively higher voltage.
  • the pulse generator according to the invention shown in Fig. 2 has a dynamic load detector 10 arranged for each emitted pulse to determine the load on the secondary winding 8 of the transformer 6 and, when the load exceeds a predetermined value, to supply additional energy to the same pulse and, thus, increase the voltage on the fence wire.
  • the predetermined load value may correspond, for instance, to a resistance of 500 ohm.
  • the load can be determined by determining the voltage of the pulse at a certain point of time, e.g. its maximum, presupposing however constant charging of the charge storage unit.
  • a certain point of time e.g. its maximum
  • presupposing however constant charging of the charge storage unit it is advantageously made on the basis of the relationship between the voltage and the current of the pulse at a certain point of time, e.g. at the time of the maximum value of the voltage.
  • the charge storage unit 3 r according to the inven ⁇ tion shown in Fig. 3 has two capacitors 11, 12 which, each via a diode 13 and 14, respectively, can be charged from the charging unit 1 (not shown).
  • the capacitor 11 is connected in series with a thyristor 15 through a first primary winding 16 of the transformer 6' while the capacitor 12 is connected in series with a second thyristor 17 through a second primary winding 18 of the transformer 6'.
  • the transformer 6' has a further winding 19 serv ⁇ ing as a sensing winding and connected to a first in ⁇ put of the load detector 10.
  • a second input of the load detector 10 is connected through a conductor part 20 in the discharge path for the capacitor 11 in the charge storage unit 3 ' .
  • a pulse induced in the sensing winding 19 at the same time as the pulse in the secondary winding 8 is a reflexion of the pulse in the secondary winding in respect of its voltage.
  • the current through the conductor part 20 upon discharge of the capacitor 11 is a measure of the charge of the capacitor 11 and also of the current accompanying the pulse induced in the secondary winding 8. From the signals on its two inputs, the load detector 10 can thus, by suitably weighting the input signals, determine the load on the secondary winding 8 of the transformer 6 r for each pulse generated;
  • the mode of operation of the circuit in Fig. 3 is as follows. With the capacitors 11 and 12 charged, the trigger circuit 4 emits an ignition pulse to the thyristor 15 , whereby the charge of the capacitor 11 is discharged through the primary winding 16 of the transformer 6' , the thyristor 15 and the conductor part 20. The pulse induced in the secondary winding 8 is applied to the electric fence wire 9. During a first part of the pulse in the secondary winding 8, the load detector 10 determines the load of the secondary winding 9, more specifically whether this load exceeds or falls below a predetermined load value.
  • the load detector 10 controls the trigger circuit 4 so as to emit an ignition pulse to the thyristor 17, whereby the capacitor 12 is discharged through the second primary winding 18 of the transformer 6 ' .
  • the trigger circuit 4 emits no ignition pulse to the thyristor 17, and the capacitor 12 is not dis ⁇ charged.
  • the diodes 13 and 14 isolate the capacitors 11 and 12 from each other, such that no renewed charg- ing of the capacitor 12 is required in this case be ⁇ fore the emission of the next pulse to the electric fence wire 9.
  • FIG. 4 A preferred embodiment of the trigger circuit 4 and the load detector 10 in Fig. 3 is shown in Fig. 4.
  • the input of the load detector 10 connected to the sensing winding 19 constitutes the input of a first amplifier 21, and the input of the load detector 10 connected to the conductor part 20 constitutes the input of a second amplifier 22.
  • These two amplifiers are suitably operational amplifiers of high input impedance.
  • the output of the amplifier 21 is connected both to a derivation circuit 23 and to the negative input of a comparator 24.
  • the output of the amplifier 22 is connected both to a derivation circuit 25 and to the positive input of the comparator 24.
  • the output of the comparator 24 is connected to the data input 5 of a D-type flip-flop 26.
  • the derivation circuit 23 is connected via a zero crossing detector 27 both to the clock input of the D-type flip-flop 26 and to the reset input of a counter 28.
  • the derivation circuit 25 is connected via a zero crossing detec- Q tor 29 to the clock input of a second D-type flip-flop 30.
  • the set input of the D-type flip-flop 26 is con ⁇ nected to ground, its Q output is connected to the gate of the thyristor 17, and its reset input is con ⁇ nected to the Q output of the flip-flop 30.
  • the data 5 input of the flip-flop 30 is connected to ground, its reset input is connected to the Q output of the flip-flop 26, and its set input is connected to an output from the counter 28, on which output a pulse appears for every 64 pulses on the input of the counter 0 28 which is supplied with a pulse train having a pulse frequency of 50 Hz.
  • Said counter output is connected to the gate of the thyristor 15 and is connected via a diode 31 to the counter input.
  • the mode of operation of the circuit in Fig. 5 is as follows.
  • an ignition pulse is emitted to the thyristor 15
  • the operation of the counter 28 is interrupted, and the flip-flop 30 is set, i.e. its Q output is "0".
  • the input signals appearing by the ignition of the thyristor 15 on the amplifiers 21 and 22 are ampli ⁇ fied thereby and compared in the comparator 24 whose output signal is "1" if the load on the secondary winding 8 of the transformer 6 ' exceeds the predeter ⁇ mined load value, and "0" if the load on the secondary 5 winding 8 of the transformer 6' falls below the predeter ⁇ mined load value.
  • the output signal of the amplifier 21 is derived by the derivation circuit 23, and the zero crossing detector 27 emits a pulse to the clock input of the flip-flop 26 when the output signal from the derivation circuit 23 is zero, i.e. when the pulse in the sensing winding 19 and thus the pulse in the secondary winding 8 have a maximum voltage value. If the output signal from the comparator 24 then is "1", an ignition pulse will be emitted to the thyristor 17, and the flip-flop 30 is at the same time reset and, in turn, resets the flip-flop 26. The clock pulse to the flip-flop 26 also resets the counter 28 which again starts counting the pulses in the pulse train on its input. However, if the output signal from the comparator 24 is "0", no ignition pulse is emitted to the thyristor 17, but the counter 28 is reset for a new pulse count.
  • the pulse on the output of the zero crossing detector 27 will appear before the pulse on the output of the zero crossing detector 29.
  • This detector will reset the flip-flop 30 when the flip-flop 26 is not emitting any pulse on its Q output, and the flip-flop 30 in turn resets the flip flop 26.
  • the pulse on the output of the zero crossing detector 29 will however appear before the pulse on the output of the zero crossing detector 27.
  • the flip-flop 30 will thus be reset and itself reset the flip-flop 26 before this receives its clock pulse.
  • no ignition pulse is emitted to the thyristor 17, which is however not desirable in this case.
  • Fig. 5 there are shown two pulses 32 and 33, the pulse 32 corresponding to the case where the load on the secondary winding 8 of the transformer 6 is below the predetermined load value, i.e. no additional energy is supplied, while the pulse 33 corresponds to the case where the load is above the predetermined load value and, thus, additional energy is supplied to the same pulse on the basis of which the load de ⁇ termination has been made, more particularly in the descending part of the pulse.
  • the total pulse time is not extended by this procedure and, hence, a consider ⁇ able increase of the shock effect can be achieved by increasing the maximum value of the voltage of the pulse.
  • the components 25, 29 and 30 can be dispensed with. Further, if the charging of the capacitors 11 and 12 can be made invariable, the amplifier 22 can also be cancelled, and the positive input of the comparator 24 can be connected to a constant reference potential.
  • the charge storage unit 3 ' in Fig. 3 it is possible to use the unit according to Fig. 1 if the thyristor 5 is a quenchable thyristor.
  • the input signals of the comparator 24 may, for example, be changed, such that the flip-flop 26 on its Q output emits a quenching pulse to the thy ⁇ ristor 5 if the load on the secondary winding 8 of the transformer 6 1 falls below the predetermined load value.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Insects & Arthropods (AREA)
  • Catching Or Destruction (AREA)
  • Generation Of Surge Voltage And Current (AREA)
  • Power-Operated Mechanisms For Wings (AREA)

Abstract

Dans un procédé pour alimenter une clôture électrique, on fait appel à un accumulateur de charge rechargeable (3') et à un transformateur (6') possédant un enroulement primaire (16, 18) au moyen duquel l'accumulateur de charge (3') est déchargeable, et possédant un enroulement secondaire (8) auquel est reliée la clôture électrique (9). Un générateur d'impulsions permettant la mise en oeuvre du procédé comporte un détecteur de charge (10) qui est apte à déterminer la charge sur l'enroulement secondaire (8) du transformateur (6') pour chaque impulsion générée à l'intérieur par la décharge de l'accumulateur de charge (3'), et un circuit de déclenchement (4) commandé par le détecteur de charge (10). Ce circuit de déclenchement est apte à commander l'accumulateur de charge (3') de manière à fournir une énergie supplémentaire à la même impulsion si la charge excède une valeur de charge prédéterminée.
PCT/SE1988/000305 1987-06-05 1988-06-03 Procede pour alimenter une cloture electrique et generateur d'impulsions permettant la mise en oeuvre du procede WO1988010059A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8702350A SE457497B (sv) 1987-06-05 1987-06-05 Saett att mata ett elstaengsel samt impulsgivare foer saettets genomfoerande
SE8702350-3 1987-06-05

Publications (1)

Publication Number Publication Date
WO1988010059A1 true WO1988010059A1 (fr) 1988-12-15

Family

ID=20368767

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1988/000305 WO1988010059A1 (fr) 1987-06-05 1988-06-03 Procede pour alimenter une cloture electrique et generateur d'impulsions permettant la mise en oeuvre du procede

Country Status (3)

Country Link
AU (1) AU1802488A (fr)
SE (1) SE457497B (fr)
WO (1) WO1988010059A1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0454543A1 (fr) * 1990-04-25 1991-10-30 RHOMER, Brigitte Clôture électrique à énergie variable
EP0514222A2 (fr) * 1991-05-17 1992-11-19 Gallagher Electronics Limited Méthode et appareil de communication
EP0543621A1 (fr) * 1991-11-18 1993-05-26 Gallagher Electronics Limited Perfectionnements et modifications de circuits de commande de clôtures électriques
DE4140628A1 (de) * 1991-12-10 1993-06-17 Ako Werke Gmbh & Co Weidezaungeraet
FR2709225A1 (fr) * 1993-08-17 1995-02-24 Horizont Geraetewerk Appareil pour clôture électrique.
WO2000035253A1 (fr) * 1998-12-08 2000-06-15 Gallagher Group Limited Ameliorations apportees a des electrificateurs de cloture electrique
DE19836050A1 (de) * 1998-08-11 2001-04-26 Ako Agrartech Gmbh & Co Kg Elektroweidezaungerät
DE19953460A1 (de) * 1999-11-05 2001-05-10 Ako Agrartech Gmbh & Co Kg Elektro-Weidezaungerät
WO2001084892A2 (fr) * 2000-05-01 2001-11-08 Tru-Test Limited Electrificateur pour cloture electrique
EP1595431A2 (fr) * 2003-02-05 2005-11-16 Gallagher Group Limited Ensemble pour la commande de parametres electriques d'une cloture electrique
JP2010197045A (ja) * 2003-02-11 2010-09-09 Taser Internatl Inc 電子式無力化装置
US8120212B2 (en) 2007-03-23 2012-02-21 Lacme Holding Method for the control of an electric fence energizer
EP2775803A1 (fr) * 2013-03-07 2014-09-10 Lemenager, Chapron Electrificateur de cloture électrique
DE102007024026B4 (de) * 2007-04-02 2017-11-16 Ako-Agrartechnik Gmbh & Co. Kg Weidezaungerät und Verfahren zum Betreiben eines Weidezaungerätes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ272112A (en) * 1995-05-12 1997-10-24 Stafix Electric Fencing Ltd Electric fence pulse generator: pulse height maintained while duration varied according to fence load

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1514726B1 (de) * 1965-06-24 1973-02-01 Schecker Geb Block Schaltung zur Erzeugung von Schreckspannungsimpulsen zur Dressur von Tieren
DE2149834A1 (de) * 1971-10-06 1973-04-12 Hans Grossheim Elektrofischgeraet
DE2438582A1 (de) * 1974-08-10 1976-02-26 Utina Elektrowerk Gmbh Elektrozaungeraet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1514726B1 (de) * 1965-06-24 1973-02-01 Schecker Geb Block Schaltung zur Erzeugung von Schreckspannungsimpulsen zur Dressur von Tieren
DE2149834A1 (de) * 1971-10-06 1973-04-12 Hans Grossheim Elektrofischgeraet
DE2438582A1 (de) * 1974-08-10 1976-02-26 Utina Elektrowerk Gmbh Elektrozaungeraet

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661589A1 (fr) * 1990-04-25 1991-10-31 Hamm Jean Jacques Cloture electrique a energie variable.
EP0454543A1 (fr) * 1990-04-25 1991-10-30 RHOMER, Brigitte Clôture électrique à énergie variable
EP0514222A2 (fr) * 1991-05-17 1992-11-19 Gallagher Electronics Limited Méthode et appareil de communication
EP0514222A3 (en) * 1991-05-17 1993-01-20 Gallagher Electronics Limited A method and apparatus pertaining to communications
EP0543621A1 (fr) * 1991-11-18 1993-05-26 Gallagher Electronics Limited Perfectionnements et modifications de circuits de commande de clôtures électriques
US5514919A (en) * 1991-11-18 1996-05-07 Gallagher Electronics Limited Electric fence energizer having a continuously varying range of output pulse voltages
DE4140628A1 (de) * 1991-12-10 1993-06-17 Ako Werke Gmbh & Co Weidezaungeraet
FR2709225A1 (fr) * 1993-08-17 1995-02-24 Horizont Geraetewerk Appareil pour clôture électrique.
DE19836050B4 (de) * 1998-08-11 2005-04-21 Ako-Agrartechnik Gmbh & Co. Kg Elektroweidezaungerät
DE19836050A1 (de) * 1998-08-11 2001-04-26 Ako Agrartech Gmbh & Co Kg Elektroweidezaungerät
WO2000035253A1 (fr) * 1998-12-08 2000-06-15 Gallagher Group Limited Ameliorations apportees a des electrificateurs de cloture electrique
DE19953460A1 (de) * 1999-11-05 2001-05-10 Ako Agrartech Gmbh & Co Kg Elektro-Weidezaungerät
DE19953460B4 (de) * 1999-11-05 2008-04-10 Ako-Agrartechnik Gmbh & Co. Kg Elektro-Weidezaungerät
WO2001084892A3 (fr) * 2000-05-01 2002-01-24 Pel Ind Ltd Electrificateur pour cloture electrique
WO2001084892A2 (fr) * 2000-05-01 2001-11-08 Tru-Test Limited Electrificateur pour cloture electrique
EP1595431A2 (fr) * 2003-02-05 2005-11-16 Gallagher Group Limited Ensemble pour la commande de parametres electriques d'une cloture electrique
EP1595431A4 (fr) * 2003-02-05 2008-03-19 Gallagher Group Ltd Ensemble pour la commande de parametres electriques d'une cloture electrique
JP2010197045A (ja) * 2003-02-11 2010-09-09 Taser Internatl Inc 電子式無力化装置
US8120212B2 (en) 2007-03-23 2012-02-21 Lacme Holding Method for the control of an electric fence energizer
DE102007024026B4 (de) * 2007-04-02 2017-11-16 Ako-Agrartechnik Gmbh & Co. Kg Weidezaungerät und Verfahren zum Betreiben eines Weidezaungerätes
EP2775803A1 (fr) * 2013-03-07 2014-09-10 Lemenager, Chapron Electrificateur de cloture électrique
FR3003119A1 (fr) * 2013-03-07 2014-09-12 Chapron Lemenager Electrificateur de cloture electrique

Also Published As

Publication number Publication date
SE8702350D0 (sv) 1987-06-05
SE457497B (sv) 1988-12-27
AU1802488A (en) 1989-01-04

Similar Documents

Publication Publication Date Title
WO1988010059A1 (fr) Procede pour alimenter une cloture electrique et generateur d'impulsions permettant la mise en oeuvre du procede
EP0588126B1 (fr) Defibrillateur cardiaque implantable
US4114628A (en) Demand pacemaker with self-adjusting threshold and defibrillating feature
US3742371A (en) Wide range regulated power supply utilizing optimized energy storage
US3617851A (en) Battery charger with control circuit for cyclical charge and discharge as a function of battery voltage during discharge
US4554500A (en) Battery charging apparatus and method
EP0660974B1 (fr) Circuit servant a charger des batteries rechargeables
JP2740652B2 (ja) バッテリ給電式電気装置
US4607208A (en) Battery charger
US4086525A (en) Circuit for preventing overdischarge of a battery
US4070699A (en) Charging circuits using controlled magnetic fields
US5350996A (en) Method and circuit for charging battery of portable apparatus
IL31473A (en) Demand pacemaker
US3602794A (en) Solid state charging circuitry using a loading coil
WO1995011058A1 (fr) Circuit de charge de condensateur pour defibrillateur implantable
US6020658A (en) Electric fence energizer
US5321347A (en) Battery charger device and method
US4405892A (en) Regulator for a generator energized battery
EP0631363B1 (fr) Circuit de charge avec circuit de surveillance de charge de batterie
US5745350A (en) Power supply circuit with a widely varying input voltage
US3846692A (en) Peak amplitude follower circuit
US3559025A (en) Rapid charging of batteries
US4366570A (en) Series inverter for capacitor charging
US4220909A (en) Half-wave regulator rectifier for an alternator
US5742104A (en) Main operated electric fence energizer

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU DK FI NO US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE