SE500470C2 - Electric fencing apparatus with attenuation of frequencies above a limit frequency - Google Patents

Electric fencing apparatus with attenuation of frequencies above a limit frequency

Info

Publication number
SE500470C2
SE500470C2 SE9102868A SE9102868A SE500470C2 SE 500470 C2 SE500470 C2 SE 500470C2 SE 9102868 A SE9102868 A SE 9102868A SE 9102868 A SE9102868 A SE 9102868A SE 500470 C2 SE500470 C2 SE 500470C2
Authority
SE
Sweden
Prior art keywords
transformer
inductance
capacitor
windings
limit frequency
Prior art date
Application number
SE9102868A
Other languages
Swedish (sv)
Other versions
SE9102868L (en
SE9102868D0 (en
Inventor
Lars-Arne Eriksson
Original Assignee
Alfa Laval Agri Int
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 Agri Int filed Critical Alfa Laval Agri Int
Priority to SE9102868A priority Critical patent/SE500470C2/en
Publication of SE9102868D0 publication Critical patent/SE9102868D0/en
Priority to PCT/SE1992/000670 priority patent/WO1993007734A1/en
Publication of SE9102868L publication Critical patent/SE9102868L/en
Publication of SE500470C2 publication Critical patent/SE500470C2/en

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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Insects & Arthropods (AREA)
  • Catching Or Destruction (AREA)
  • Magnetic Treatment Devices (AREA)
  • Filters And Equalizers (AREA)
  • Electrotherapy Devices (AREA)

Abstract

In an electric fence energising apparatus for producing electric pulses in an electric fence a chargeable capacitor (C3) is connected over the primary winding of a transformer (T1), the fence being connected to the secondary winding of said transformer to receive pulses at the discharge of the capacitor. The primary winding of the transformer is divided into two oppositely connected windings (P1, P2) and a capacitor (C2) connected over said primary windings and an inductance (L2) connected between said primary windings and ground are provided to form, together with the leakage inductance of the transformer, a filter to attenuate frequencies above a predetermined upper limit frequency.

Description

2 att inte hastigheten för urladdningskondensatorns C3 urladdning skall bli för hög är transformatorn konstruerad för att få en hög kopplingsinduktans. Ett filter är inrättat på transforma- torns T1 primärsida, som dämpar högfrekventa komponenter, över 150 kHz. Filtret är bildat av den över transformatorns T1 pri- märlindning kopplade kondensatorn C2, induktansen L2 samt trans- formatorns T1 läckinduktans. 2 that the speed of the discharge of the discharge capacitor C3 should not be too high, the transformer is designed to obtain a high switching inductance. A filter is set up on the primary side of the transformer T1, which attenuates high-frequency components, above 150 kHz. The filter is formed by the capacitor C2 coupled across the primary winding of the transformer T1, the inductance L2 and the leakage inductance of the transformer T1.

Transformatorns Tl primärlindning är uppdelad i två, motrik- tat kopplade lindningar, över vilka avstörningskondensatorn C2 är kopplad. Genom att kondensatorn på detta sätt kopplas över de två motkopplade lindningarna förstärks dess verkan i filtret.The primary winding of the transformer T1 is divided into two, oppositely connected windings, over which the interference capacitor C2 is connected. By connecting the capacitor in this way over the two connected windings, its effect in the filter is amplified.

För att få stor filterverkan, d v s lång stigtid för pulsen och ändå låga förluster är filtrets induktans L2 endast inkopp- lad under den första delen av pulsen. Under den senare delen av pulsen leder tyristorn TYR2 och leder följaktligen strömmen förbi induktansen L2. över induktansen L2 skulle annars ett oönskat spänningsfall bildas på grund av dess resistans med åtföljande förluster.In order to have a large filter effect, ie a long rise time for the pulse and still low losses, the inductance L2 of the filter is only switched on during the first part of the pulse. During the latter part of the pulse, the thyristor conducts TYR2 and consequently conducts the current past the inductance L2. over the inductance L2, an undesired voltage drop would otherwise be formed due to its resistance with consequent losses.

Uppfinningen har ovan beskrivits i anslutning till en bat- teridriven elstängselapparat men avstörningstekniken enligt uppfinningen är lika användbar vid nätdrivna apparater.The invention has been described above in connection with a battery-powered electric fence apparatus, but the interference technique according to the invention is equally useful with mains-operated devices.

Claims (3)

(_I 9; Q) V \fl CJ 3 Patentkrav(_I 9; Q) V \ fl CJ 3 Patent Claims 1. Elstängselapparat för att alstra elektriska pulser i ett elstängsel, varvid en uppladdningsbar urladdningskondensator (C3) är ansluten över primärlindningen (P2) på en transformator (T1), till vars sekundärlindning stängslet är anslutet för att motta pulser vid kondensatorns urladdning, kännetecknad av att transformatorns primärlindning är uppdelad i två lindningar (P1,P2), vilka är motriktat kopplade, samt att å ena sidan en över dessa primärlindningar kopplad kondensator (C2) och en mellan primärlindningarna och jord kopplad induktans (L2) är anordnade att tillsammans med å andra sidan transformatorns läckinduktans bilda ett filter för att dämpa frekvenser över en fastställd, övre gränsfrekvens.An electric fence apparatus for generating electrical pulses in an electric fence, wherein a rechargeable discharge capacitor (C3) is connected across the primary winding (P2) of a transformer (T1), to which secondary winding the fence is connected to receive pulses upon discharge of the capacitor. the primary winding of the transformer is divided into two windings (P1, P2), which are connected in opposite directions, and that on the one hand a capacitor (C2) connected across these primary windings and an inductance (L2) connected between the primary windings and ground are arranged to since the leakage inductance of the transformer forms a filter for attenuating frequencies above a set, upper limit frequency. 2. Apparat enligt patentkrav 1, kännetecknad av att trans- formatorn är utförd med stor läckinduktans så att stigtiden för den på elstängslet utsända pulsen inte är för kort, företrädes- vis uppgår stigtiden till ca 80 us.Apparatus according to claim 1, characterized in that the transformer is designed with a large leakage inductance so that the rise time of the pulse transmitted on the electric fence is not too short, preferably the rise time amounts to about 80 us. 3. Apparat enligt patentkrav 1 och 2, kännetecknad av att filtrets induktans (L2) är inkopplad endast under pulsens första del, varvid organ (4, TYR2) är inrättade att leda strömmen förbi induktansen under senare delen av pulsen.Apparatus according to claims 1 and 2, characterized in that the inductance of the filter (L2) is switched on only during the first part of the pulse, wherein means (4, TYR2) are arranged to conduct the current past the inductance during the later part of the pulse.
SE9102868A 1991-10-03 1991-10-03 Electric fencing apparatus with attenuation of frequencies above a limit frequency SE500470C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9102868A SE500470C2 (en) 1991-10-03 1991-10-03 Electric fencing apparatus with attenuation of frequencies above a limit frequency
PCT/SE1992/000670 WO1993007734A1 (en) 1991-10-03 1992-09-25 An electric fence energising apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9102868A SE500470C2 (en) 1991-10-03 1991-10-03 Electric fencing apparatus with attenuation of frequencies above a limit frequency

Publications (3)

Publication Number Publication Date
SE9102868D0 SE9102868D0 (en) 1991-10-03
SE9102868L SE9102868L (en) 1993-04-04
SE500470C2 true SE500470C2 (en) 1994-07-04

Family

ID=20383897

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9102868A SE500470C2 (en) 1991-10-03 1991-10-03 Electric fencing apparatus with attenuation of frequencies above a limit frequency

Country Status (2)

Country Link
SE (1) SE500470C2 (en)
WO (1) WO1993007734A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5360280A (en) * 1992-05-19 1994-11-01 Metamorfyx Ergonomic keyboard including arcuate elongated keys

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU592155B2 (en) * 1986-02-24 1990-01-04 Gallagher Electronics Limited Electric fence energiser

Also Published As

Publication number Publication date
WO1993007734A1 (en) 1993-04-15
SE9102868L (en) 1993-04-04
SE9102868D0 (en) 1991-10-03

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Legal Events

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NUG Patent has lapsed