WO1993007735A1 - Procede servant a adapter le fonctionnement d'un dispositif d'excitation d'une cloture electrique a un type de batterie - Google Patents

Procede servant a adapter le fonctionnement d'un dispositif d'excitation d'une cloture electrique a un type de batterie Download PDF

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Publication number
WO1993007735A1
WO1993007735A1 PCT/SE1992/000671 SE9200671W WO9307735A1 WO 1993007735 A1 WO1993007735 A1 WO 1993007735A1 SE 9200671 W SE9200671 W SE 9200671W WO 9307735 A1 WO9307735 A1 WO 9307735A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
voltage
capacitor
decreasing
charging
Prior art date
Application number
PCT/SE1992/000671
Other languages
English (en)
Inventor
Lars-Arne Eriksson
Original Assignee
Alfa-Laval Agriculture International 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 Alfa-Laval Agriculture International Ab filed Critical Alfa-Laval Agriculture International Ab
Priority to DE4293194T priority Critical patent/DE4293194T1/de
Priority to GB9405368A priority patent/GB2275583B/en
Publication of WO1993007735A1 publication Critical patent/WO1993007735A1/fr
Priority to SE9401075A priority patent/SE9401075L/

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
    • 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
    • H05C3/00—Other circuits or apparatus

Definitions

  • the subject invention relates to a method for adapting the operation of a battery powered electric fence energiser to type of battery.
  • the object of the present invention is to achieve maximum service lifetime of the battery at the use of dry batteries as well as alkaline batteries. This object is achieved by a method of the kind indicated by way of introduction by determining the rate of battery voltage decrease, decreasing the power consumption of the apparatus if the the rate of decrease exceeds a predetermined limit, and determining the energy required for charging a discharge capacitor arranged for the output pulse generation, an essentially constant current being drawn from the battery during the charging period for charging the capacitor.
  • the characteris ⁇ tic of the batteries is considered, the current consumption from the battery for charging the discharge capacitor for generating the output pulses being decreased at a to large decrease of the battery voltage.
  • the current consumption from the battery for charging the discharge capacitor for generating the output pulses being decreased at a to large decrease of the battery voltage.
  • the outdoor temperature is measured where the apparatus is placed, and the output power from the apparatus is decreased when the temperature is decreasing below a limit value.
  • the output power can be decreased successively in several steps at decreasing temperature, the battery being completely cut off at a certain temperature.
  • Figure 1 shows a schematical circuit diagram of one embodiment of a battery operated electric fence energiser for implementing the method according to the invention.
  • FIG. 2 shows voltage-time characteristics for different types of batteries
  • FIG 3 illustrates the current drawn from the battery during the charging period for different modes of operation.
  • the battery not shown, is intended to be connected to terminals Wl and W2.
  • Sl is a switch for connec ⁇ ting and disconnecting the battery.
  • the elctric fence apparatus is connected at terminals OUT and GND over the secondary side of a transformer Tl.
  • the primary side of the transformer Tl is divided into two windings, coupled in two opposite directions, i.e. an energy recovery winding PI and a pulse winding P2.
  • a discharge capacitor C3 is connected over the pulse winding P2.
  • a transistor Trl included in a DC-DC converter 2 is control ⁇ led by short pulses from a micro processor, not shown, included a control unit 4. This results in a short current from the battery through the transistor Trl and an inductance LI, connected in memori with said transistor.
  • the trans ⁇ istor Trl subsequently is cut off a voltage will be produced over the the inductance LI, which results in a current to the capacitor C3 through a diode D3 coupled to the inductance LI. The voltage over the capacitor C3 will thus increase somewhat for each such current impulse.
  • the voltage over the capacitor C3 is sensed by a measu ⁇ ring unit 6 over a resistor R2 and when a predetermined maximum voltage has been obtained the charging process is interrupted.
  • a thyristor TYR1 connected in succession with the diode D3, the winding P2 and an inductance L2, is ignited from the micro processor in the control unit 4.
  • the micro processor is programmed to ignite the thyristor TYR1 after a predetermined time from the preceding pulse.
  • a current will then start flowing from the capacitor C3 through the winding P2, the inductance L2 and the thyristor TYR1.
  • the inductance L2 has the function of limiting the increase rate of the current.
  • the micro processor in the control unit 4 will ignite a thyristor TYR2, connected in parallell with the inductance L2 and the thyris ⁇ tor TYR1, whereby the energy in the capacitor C3 will be drained through the winding P2 of the transformer Tl and the thyristor TYR2.
  • the pulse through the winding P2 will be stept up by the transformer so as to obtain an output pulse of typically 4-8 kv on the secondary side of the transformer Tl, to which the electrical fence is connected.
  • the operating voltage of the battery is typically in the range 5-9 V and the charging energy amounts to 100-350 mJ.
  • the pulse length is normally 1,4 seconds.
  • the voltage over the capacitor C3 is continously measured through the resistor R2 for security reasons. If the voltage does not develop in a predescribed manner the charging from the micro processor of the control unit 4 is interrupted.
  • the side of the energy recovery winding PI connected to the energy storing capacitor Cl goes positive and a current will flow through the diode D2 and the storing capacitor Cl will be charged, i.e. energy recovered from the fence is restored in the storing capacitor Cl.
  • a diode Dl arranged between the terminal Wl and the switch Sl prevents the recovered energy from going into the battery. This is because as soon as the voltage over the capacitor Cl rises over the battery voltage the diode Dl will be blocked.
  • the diode Dl is conveniently a Schottky diode.
  • the current which is recovered in the energy recovery winding also tends to charge the discharge capacitor C3 negatively.
  • a diode D4 connected over the thyristor TYR1 this charge is later discharged through the transformer and is turned to a positive charge in C3 through the induc ⁇ tance of the transformer.
  • the recovery energy stored in the storing capacitor Cl is first consumed, since the diode Dl is block ⁇ ing as long as the voltage over the capacitor Cl is larger than the battery voltage. Not until the energy of the storing capacitor Cl has been drained so that the voltage has decrea ⁇ sed below the battery voltage, current is beginning to be drawn from the battery for charging of the capacitor C3.
  • the voltage of the discharge capacitor C3 is measured when the energi of the storing capacitor Cl has been drained, and the remaining voltage over the discharge capaci ⁇ tor C3 is calculated. From this the average current required for reaching the correct capacitor voltage at the end of the discharge period is determined and this average current is drawn from the battery. Such a constant current consumption without heavy current top values is advantagous for the battery.
  • the transformer Tl is designed to achieve a high coupling inductance.
  • the filter is arranged on the primary side of the transformer, which attenuates high frequency components, above 150 kHz.
  • the filter consists, on the one hand, of the capacitor C2 connected over the windings PI and P2 of the transformer Tl and the inductance L2 connected between the primary winding
  • the inductance L2 of the filter is only connected into circuit during the first part of the pulse.
  • the thyristor TYR2 is conducting and is conducts the current past the inductance L2. Otherwise an undesired voltage drop should appear over
  • the battery voltage is measured regularly, e.g. once an hour, and if the battery voltage is decreasing below a predertermined threshold or if the battery voltage is decrea-
  • a permissable threshold is set for the battery voltage.
  • the threshold is set at a comparatively low level, while for batteries with an essenti ⁇ ally constant voltage level during the operational time, i.e. for alkaline batteries, the permissable threshold is set comparatively high, as the voltage is decreasing rapidly when the battery no longer maintains its voltage level.
  • Figure 2 shows the voltage-time charac- teristic for two different types of batteries.
  • a light emitting diode LED1 is also connected, which is normally twinkling at each output pulse to the fence, until the battery voltage has decreased below the predetermined level. This light emitting diode LED1 serves thus as an indication of "poor battery”. Absence of twinkles from the light emitting diode LED1 indicates that the battery needs to be changed.
  • the apparatus is made to reduce the power at a decreasing temperature.
  • a temperature dependent resistance R3 connected to the measuring unit 6 is used.
  • the output power can be decreased to 50% and at -5 degrees C it can be cut to almost zero.
  • the average current that must be drawn from the battery for charging of the discharge capacitor C3 to the predetermined level during the charging period is calculated and an essentially constant current equal to this average current is drawn from the battery.
  • Case I illustrates the current consumption according to prior art having no possibility to preset the magnitude of the charging current drawn from the battery
  • cases II and III show the preset, essentially constant current which is drawn during the charging process according to the present invention at two differently sized batteries.
  • an essentially constant current is drawn from the battery during the charging process.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Insects & Arthropods (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Catching Or Destruction (AREA)

Abstract

Selon un procédé servant à adapter le fonctionnement d'un dispositif d'excitation d'une clôture électrique alimentée par batterie au type de la batterie, on détermine le taux de décroissance de la tension de la batterie et la consommation d'énergie dudit dispositif diminue si le taux de décroissance dépasse une limite prédéterminée. De plus, on détermine l'énergie nécessaire pour charger un condensateur à décharges (C3), conçu pour produire des impulsions de sortie, et un courant essentiellement constant est tiré de la batterie pendant la période de charge dudit condensateur.
PCT/SE1992/000671 1991-10-03 1992-09-25 Procede servant a adapter le fonctionnement d'un dispositif d'excitation d'une cloture electrique a un type de batterie WO1993007735A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE4293194T DE4293194T1 (de) 1991-10-03 1992-09-25 Verfahren zur betrieblichen Anpassung eines Weidezaun-Unterbrechers an die Batterieart
GB9405368A GB2275583B (en) 1991-10-03 1992-09-25 A method for adapting the operation of an electric fence energiser to the type of battery
SE9401075A SE9401075L (sv) 1991-10-03 1994-03-30 Sätt att anpassa driften av en elstängselapparat till typ av batteri

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9102866-2 1991-10-03
SE9102866A SE500486C2 (sv) 1991-10-03 1991-10-03 Sätt att anpassa driften av en elstängselapparat till batterityp

Publications (1)

Publication Number Publication Date
WO1993007735A1 true WO1993007735A1 (fr) 1993-04-15

Family

ID=20383895

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1992/000671 WO1993007735A1 (fr) 1991-10-03 1992-09-25 Procede servant a adapter le fonctionnement d'un dispositif d'excitation d'une cloture electrique a un type de batterie

Country Status (4)

Country Link
DE (1) DE4293194T1 (fr)
GB (1) GB2275583B (fr)
SE (2) SE500486C2 (fr)
WO (1) WO1993007735A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995018520A1 (fr) * 1993-12-29 1995-07-06 Alfa Laval Agri Ab Circuit de mise sous tension d'une cloture electrique alimente par le reseau
WO2003055284A2 (fr) * 2001-12-11 2003-07-03 Delaval Holding Ab Appareil et procede de mise sous tension d'une cloture electrique
FR2865097A1 (fr) * 2004-01-14 2005-07-15 Lacme Procede pour augmenter l'autonomie d'un electrificateur de cloture et electrificateur associe
GB2429344B (en) * 2004-05-24 2008-12-31 Milwaukee Electric Tool Corp Method and system for battery protection
US7589500B2 (en) 2002-11-22 2009-09-15 Milwaukee Electric Tool Corporation Method and system for battery protection
US9312721B2 (en) 2002-11-22 2016-04-12 Milwaukee Electric Tool Corporation Lithium-based battery pack for a hand held power tool

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2303229B (en) * 1995-03-30 1999-06-02 Eddie Palin Distribution Limit Constant power output circuit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4210855A (en) * 1977-06-10 1980-07-01 Robert Bosch Gmbh Apparatus for regulating the current drawn from an electric battery
GB2185326A (en) * 1986-01-14 1987-07-15 Eikoh Giken Co Ltd Testing stand-by batteries
DE3611484A1 (de) * 1986-04-05 1987-10-08 Ceag Licht & Strom Verfahren zur erzielung eines tiefentladeschutzes fuer eine wiederaufladbare batterie, und schaltungsanordnung zur durchfuehrung des verfahrens

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4210855A (en) * 1977-06-10 1980-07-01 Robert Bosch Gmbh Apparatus for regulating the current drawn from an electric battery
GB2185326A (en) * 1986-01-14 1987-07-15 Eikoh Giken Co Ltd Testing stand-by batteries
DE3611484A1 (de) * 1986-04-05 1987-10-08 Ceag Licht & Strom Verfahren zur erzielung eines tiefentladeschutzes fuer eine wiederaufladbare batterie, und schaltungsanordnung zur durchfuehrung des verfahrens

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995018520A1 (fr) * 1993-12-29 1995-07-06 Alfa Laval Agri Ab Circuit de mise sous tension d'une cloture electrique alimente par le reseau
WO2003055284A2 (fr) * 2001-12-11 2003-07-03 Delaval Holding Ab Appareil et procede de mise sous tension d'une cloture electrique
WO2003055284A3 (fr) * 2001-12-11 2003-11-20 Delaval Holding Ab Appareil et procede de mise sous tension d'une cloture electrique
US10097026B2 (en) 2002-11-22 2018-10-09 Milwaukee Electric Tool Corporation Lithium-based battery pack for a hand held power tool
US9680325B2 (en) 2002-11-22 2017-06-13 Milwaukee Electric Tool Corporation Lithium-based battery pack for a hand held power tool
US7589500B2 (en) 2002-11-22 2009-09-15 Milwaukee Electric Tool Corporation Method and system for battery protection
US11469608B2 (en) 2002-11-22 2022-10-11 Milwaukee Electric Tool Corporation Lithium-based battery pack for a hand held power tool
US9112248B2 (en) 2002-11-22 2015-08-18 Milwaukee Electric Tool Corporation Method and system for battery protection
US9312721B2 (en) 2002-11-22 2016-04-12 Milwaukee Electric Tool Corporation Lithium-based battery pack for a hand held power tool
US9660293B2 (en) 2002-11-22 2017-05-23 Milwaukee Electric Tool Corporation Method and system for battery protection
US11196080B2 (en) 2002-11-22 2021-12-07 Milwaukee Electric Tool Corporation Method and system for battery protection
US9819051B2 (en) 2002-11-22 2017-11-14 Milwaukee Electric Tool Corporation Method and system for battery protection
US10862327B2 (en) 2002-11-22 2020-12-08 Milwaukee Electric Tool Corporation Lithium-based battery pack for a hand held power tool
US10224566B2 (en) 2002-11-22 2019-03-05 Milwaukee Electric Tool Corporation Method and system for battery protection
US10536022B2 (en) 2002-11-22 2020-01-14 Milwaukee Electric Tool Corporation Lithium-based battery pack for a hand held power tool
US10593991B2 (en) 2002-11-22 2020-03-17 Milwaukee Electric Tool Corporation Method and system for battery protection
FR2865097A1 (fr) * 2004-01-14 2005-07-15 Lacme Procede pour augmenter l'autonomie d'un electrificateur de cloture et electrificateur associe
DE102005000629B4 (de) * 2004-01-14 2013-12-05 Lacme Holding Verfahren zur Erhöhung der Autonomie eines Elektrozaungeräts und eines zugehörigen Elektrogeräts
GB2429344B (en) * 2004-05-24 2008-12-31 Milwaukee Electric Tool Corp Method and system for battery protection

Also Published As

Publication number Publication date
GB2275583B (en) 1995-08-02
SE9401075D0 (sv) 1994-03-30
GB2275583A (en) 1994-08-31
SE9102866L (sv) 1993-04-04
SE9401075L (sv) 1994-03-30
GB9405368D0 (en) 1994-05-25
SE500486C2 (sv) 1994-07-04
SE9102866D0 (sv) 1991-10-03
DE4293194T1 (de) 1994-09-08

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