EP0184009B1 - Mains plug suppressing interference caused by the supply current - Google Patents

Mains plug suppressing interference caused by the supply current Download PDF

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Publication number
EP0184009B1
EP0184009B1 EP85114102A EP85114102A EP0184009B1 EP 0184009 B1 EP0184009 B1 EP 0184009B1 EP 85114102 A EP85114102 A EP 85114102A EP 85114102 A EP85114102 A EP 85114102A EP 0184009 B1 EP0184009 B1 EP 0184009B1
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EP
European Patent Office
Prior art keywords
plug
mains
cable
core
housing
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP85114102A
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German (de)
French (fr)
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EP0184009A3 (en
EP0184009A2 (en
Inventor
Anton Dipl.-Ing. Schmeller (Fh)
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Vogt Electronic AG
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Vogt Electronic AG
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Publication date
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Application filed by Vogt Electronic AG filed Critical Vogt Electronic AG
Priority to AT85114102T priority Critical patent/ATE66319T1/en
Publication of EP0184009A2 publication Critical patent/EP0184009A2/en
Publication of EP0184009A3 publication Critical patent/EP0184009A3/en
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Publication of EP0184009B1 publication Critical patent/EP0184009B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/719—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters

Definitions

  • the invention relates to a power plug according to the preamble of claim 1.
  • Power plugs of this type are known (DE-B-31 48 351).
  • the so-called inflow immunity Consumer electronics devices, especially television sets, e.g. in the Federal Republic of Germany in the VDE regulation, Official Gazette No. 69, the so-called inflow immunity. It is known and has proven to be advantageous because of the antenna effect of the power cord to insert a coil between each of the two neutral and phase conductor plug pins and a connecting terminal for the associated connecting cable wire in the connector housing, that is to say to accommodate it in the connector, in order to achieve this inflow immunity.
  • the two coils are parallel to one another and are separated from one another by a separator. Together with blocking capacitors, they form a line filter.
  • the blocking capacitors can consist of the relatively large parasitic capacitances which are present in the plug between the coils and lines which are arranged parallel and at a distance from one another.
  • suppressor plug in the form of an adapter plug known for two-wire device connection cable, which consists of a ring core, two wound thereon in opposite directions, each in the cable from a plug to a socket for a cable wire coils and a capacitor connected in parallel to the two pins.
  • the coils form a line filter together with the capacitor (DE-A-2 042 342).
  • This interference protection device requires a shielded cable and is built into its three-pin connector. It consists of a toroid and two symmetrical windings wound thereon, each of which is connected to the line of the phase conductor and the neutral of the connecting cable, as well as from at least one side of the coil arrangement between the line of the phase or neutral and the line of the earth conductor switched capacitors, which together with the coils form a line filter.
  • the capacitors consist of the distributed capacitance of the cable, which is relatively large because of the earth conductor and the shield connected to it (EP-A2-90 774).
  • the coils used, together with capacitors, form an LC low-pass filter only the one mentioned above in accordance with DE-B-31 48 351 being usable for two-wire, unshielded device connection cables.
  • the invention has for its object to provide a particularly compact mechanical plug for the inflow resistance in mechanical design, which is also characterized by an even better interference suppression compared to the known generic suppressor according to DE-B-31 48 351.
  • the parasitic capacitances present in the plug and along the device connection cable are negligibly small compared to the inductances of the two coils of the toroidal core choke, so that the plug, unlike the known interference protection devices, does not contain an LC filter. Rather, the desired interference suppression or inflow immunity to interference is brought about in a novel conception with the inductances of the toroidal core choke alone, and this also with a better effect than the known interference suppressor according to DE-B31 48 351.
  • the toroidal core which is held securely in the plug in turn fixes the windings mechanically precisely in the plug, which results in a particularly compact mechanical structure in which the individual parts are precisely defined relative to one another.
  • the subclaims relate to preferred configurations of the power plug according to claim 1.
  • the invention is explained in more detail below with reference to the drawing using an exemplary embodiment.
  • the drawing shows a power plug according to the invention in plan view and in side view, the connector housing being omitted and only being indicated in its outline by a dashed line.
  • the (standardized) connector pins are labeled 1.
  • the connector pins 1 are injected into a base plate 2, which in turn, integrally molded, has a receptacle 3 for a toroidal core choke 5, which also carries solder or crimp contacts 4 for the electrical connection of the wires 8 of the leading connection cable.
  • the receptacle 3 holds the core of the toroidal choke firmly in place.
  • the wire ends 6 of the coils, which form a current-compensated toroidal choke with the toroid are electrically connected on the one hand to the plug pins 1 and on the other hand to the soldering or crimping contacts 4 by suitable methods (welding, ultrasound welding or soldering).
  • mains supply cables for consumer electronics devices are provided with a Euro plug, which allows any European socket to be used.
  • Such cables are usually assembled in such a way that a plug base which is soldered or welded to the wires of the connecting cable is placed in an injection mold and then encapsulated with a relatively elastic plastic.
  • the power plug according to the invention holds the receptacle 3, the toroidal choke 5 and the contacts 4 for the wires of the connecting cable during the spraying process in a fixed position with respect to the base plate 2 with the plug pins 1, so that these parts can not be accidentally moved when encapsulated with plastic.
  • the core of the toroidal core choke together with the receptacle, results in a mechanically very compact structure, in which the coils are also immovably fixed, and the current-compensated toroidal core choke 5 also results in particularly good inflow immunity to interference.

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Abstract

So-called conducted interference immunity is required of home-entertainment electronic equipment, especially television sets. It is known, and has been found to be advantageous because of the antenna effect of the mains supply cable, to fit a coil arrangement in the connector to achieve this conducted interference immunity, which coil arrangement consists of one coil for each of the two cable wires, each of the two coils being inserted into the connector housing (7) between an associated connector pin (1) and an associated connecting terminal (4) for the relevant cable wire (8). In the mains plug according to the invention, together with a ring core, the two coils form a current-compensated ring-core inductor 5. This results in a particularly compact mechanical construction in conjunction with excellent conducted interference immunity. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Netzstecker gemäß dem Oberbegriff des Patentanspruchs 1. Netzstecker dieser Art sind bekannt (DE-B-31 48 351).The invention relates to a power plug according to the preamble of claim 1. Power plugs of this type are known (DE-B-31 48 351).

Von Geräten der Unterhaltungselektronik, insbesondere von Fernsehgeräten, wird z.B. in der Bundesrepublik Deutschland in der VDE-Vorschrift, Amtsblatt Nr. 69, die sogenannte Einströmstörfestigkeit gefordert. Es ist bekannt und hat sich wegen der Antennenwirkung des Netzanschlußkabels als vorteilhaft erwiesen, zum Erreichen dieser Einströmstörfestigkeit jeweils eine Spule zwischen jeden der beiden Null- und Phasenleitersteckerstifte und eine Anschlußklemme für die zugehörige Anschlußkabelader im Steckergehäuse einzufügen, also im Stecker unterzubringen. Bei dem bekannten Netzstecker der im Oberbegriff des Patentanspruchs 1 angegebenen Gattung liegen die beiden Spulen parallel zueinander und sind durch einen Seperator voneinander getrennt. Sie bilden zusammen mit Sperrkondensatoren ein Netzfilter. Die Sperrkondensatoren können aus den relativ großen parasitären Kapazitäten bestehen, die zwischen den im Abstand parallel zueinander angeordneten Spulen und Leitungen im Stecker vorhanden sind.Consumer electronics devices, especially television sets, e.g. in the Federal Republic of Germany in the VDE regulation, Official Gazette No. 69, the so-called inflow immunity. It is known and has proven to be advantageous because of the antenna effect of the power cord to insert a coil between each of the two neutral and phase conductor plug pins and a connecting terminal for the associated connecting cable wire in the connector housing, that is to say to accommodate it in the connector, in order to achieve this inflow immunity. In the known power plug of the type specified in the preamble of claim 1, the two coils are parallel to one another and are separated from one another by a separator. Together with blocking capacitors, they form a line filter. The blocking capacitors can consist of the relatively large parasitic capacitances which are present in the plug between the coils and lines which are arranged parallel and at a distance from one another.

Es ist auch bereits ein Entstörstecker in Form eines Zwischensteckers für zweiadrige Geräteanschlußkabel bekannt, der aus einem Ringkern, zwei darauf in entgegengesetzten Richtungen gewickelten, jeweils in den Leitungszug von einem Steckerstift zu einer Steckbuchse für eine Kabelader geschalteten Spulen und einem zu den beiden Steckerstiften parallel geschalteten Kondensator besteht. Auch hier bilden die Spulen zusammen mit dem Kondensator ein Netzfilter (DE-A-2 042 342).It is also a suppressor plug in the form of an adapter plug known for two-wire device connection cable, which consists of a ring core, two wound thereon in opposite directions, each in the cable from a plug to a socket for a cable wire coils and a capacitor connected in parallel to the two pins. Here too, the coils form a line filter together with the capacitor (DE-A-2 042 342).

Bekannt ist ferner eine Störschutzeinrichtung für über ein dreiadriges Kabel an das Netz anzuschließende Geräte. Diese Störschutzeinrichtung setzt ein abgeschirmtes Kabel voraus und ist in dessen dreipoligen Stecker eingebaut. Sie besteht aus einem Ringkern und zwei darauf gewickelten, symmetrischen Wicklungen, die jeweils in den Leitungszug des Phasenleiters und des Nulleiters des Anschlußkabels geschaltet sind, sowie aus mindestens auf einer Seite der Spulenanordnung zwischen den Leitungszug des Phasen- bzw. Nulleiters und den Leitungszug des Erdleiters geschalteten Kondensatoren, die zusammen mit den Spulen ein Netzfilter bilden. Bei einer für hohe Störfrequenzen vorgesehenen Ausführungsform dieser bekannten Störschutzeinrichtung bestehen die Kondensatoren aus der verteilten Kapazität des Kabels, die wegen des Erdleiters und der mit diesem verbundenen Abschirmung relativ groß ist (EP-A2-90 774).Also known is a noise protection device for devices to be connected to the network via a three-wire cable. This interference protection device requires a shielded cable and is built into its three-pin connector. It consists of a toroid and two symmetrical windings wound thereon, each of which is connected to the line of the phase conductor and the neutral of the connecting cable, as well as from at least one side of the coil arrangement between the line of the phase or neutral and the line of the earth conductor switched capacitors, which together with the coils form a line filter. In an embodiment of this known interference protection device provided for high interference frequencies, the capacitors consist of the distributed capacitance of the cable, which is relatively large because of the earth conductor and the shield connected to it (EP-A2-90 774).

Bei allen vorstehend geschilderten Störschutzeinrichtungen bilden die verwendeten Spulen zusammen mit Kondensatoren ein LC-Tiefpaßfilter, wobei nur die oben an erster Stelle genannte gemäß DE-B-31 48 351 für zweiadrige, unabgeschirmte Geräteanschlußkabel verwendbar ist.In all of the above-mentioned interference protection devices, the coils used, together with capacitors, form an LC low-pass filter, only the one mentioned above in accordance with DE-B-31 48 351 being usable for two-wire, unshielded device connection cables.

Der Erfindung liegt die Aufgabe zugrunde, einen im mechanischen Aufbau besonders kompakten Netzstecker für die Einströmfestigkeit gemäß dem Oberbegriff des Patentanspruchs 1 zu schaffen, der sich überdies durch eine noch bessere Entstörwirkung gegenüber dem bekannten gattungsgemäßen Entstörstecker gemäß DE-B-31 48 351 auszeichnet.The invention has for its object to provide a particularly compact mechanical plug for the inflow resistance in mechanical design, which is also characterized by an even better interference suppression compared to the known generic suppressor according to DE-B-31 48 351.

Die vor stehende Aufgabe wird durch die im Kennzeichnungsteil des Patentanspruchs 1 angegebenen Merkmale gelöst.The above object is achieved by the features specified in the characterizing part of claim 1.

Bei dem erfindungsgemäßen Netzstecker sind die im Stecker und entlang des Geräteanschlußkabels vorhandenen parasitären Kapazitäten gegenüber den Induktivitäten der beiden Spulen der Ringkerndrossel vernachlässigbar klein, so daß der Stecker, anders als bei den bekannten Störschutzeinrichtungen, kein LC-Filter beinhaltet. Es wird vielmehr in neuartiger Konzeption mit den Induktivitäten der Ringkerndrossel allein die gewünschte Entstörung bzw. Einströmstörfestigkeit herbeigeführt, und dies zudem noch mit einer gegenüber dem bekannten Entstörstecker gemäß DE-B31 48 351 besseren Wirkung.In the case of the mains plug according to the invention, the parasitic capacitances present in the plug and along the device connection cable are negligibly small compared to the inductances of the two coils of the toroidal core choke, so that the plug, unlike the known interference protection devices, does not contain an LC filter. Rather, the desired interference suppression or inflow immunity to interference is brought about in a novel conception with the inductances of the toroidal core choke alone, and this also with a better effect than the known interference suppressor according to DE-B31 48 351.

Hinzu kommt, daß der im Stecker sicher gehaltene Ringkern seinerseits die Wicklungen mechanisch genau im Stecker festlegt, wodurch sich ein besonders kompakter mechanischer Aufbau ergibt, bei dem die einzelnen Teile relativ zueiander genau festgelegt sind.In addition, the toroidal core which is held securely in the plug in turn fixes the windings mechanically precisely in the plug, which results in a particularly compact mechanical structure in which the individual parts are precisely defined relative to one another.

Die Unteransprüche haben bevorzugte Ausgestaltungen des Netzsteckers gemäß Patentanspruch 1 zum Gegenstand.The subclaims relate to preferred configurations of the power plug according to claim 1.

Die Erfindung wird nachstehend anhand der Zeichnung an einem Ausführungsbeispiel noch näher erläutert. Die Zeichnung zeigt einen erfindungsgemäßen Netzstecker in Draufsicht und in Ansicht von der Seite, wobei das Steckergehäuse weggelassen und nur in seinem Umriß durch einen gestrichelten Linienzug angedeutet ist.The invention is explained in more detail below with reference to the drawing using an exemplary embodiment. The drawing shows a power plug according to the invention in plan view and in side view, the connector housing being omitted and only being indicated in its outline by a dashed line.

In der Zeichnung sind die (genormten) Steckerstifte mit 1 bezeichnet. Die Steckerstifte 1 sind in einer Grundplatte 2 eingespritzt , die wiederum,einstückig angespritzt, eine Aufnahme 3 für eine Ringkerndrossel 5 aufweist, die auch Löt- oder Quetschkontakte 4 für den elektrischen Anschluß der Adern 8 des wegführenden Anschlußkabels trägt. Die Aufnahme 3 hält den Kern der Ringkerndrossel fest an seinem Platz. Die Drahtenden 6 der Spulen, die mit dem Ringkern eine stromkompensierte Ringkerndrossel bilden, sind einerseits mit den Steckerstiften 1 und andererseits mit den Löt- oder Quetschkontakten 4 durch geeignete Verfahren (Schweißen, Ultraschall-Schweißen oder Löten) elektrisch verbunden.In the drawing, the (standardized) connector pins are labeled 1. The connector pins 1 are injected into a base plate 2, which in turn, integrally molded, has a receptacle 3 for a toroidal core choke 5, which also carries solder or crimp contacts 4 for the electrical connection of the wires 8 of the leading connection cable. The receptacle 3 holds the core of the toroidal choke firmly in place. The wire ends 6 of the coils, which form a current-compensated toroidal choke with the toroid, are electrically connected on the one hand to the plug pins 1 and on the other hand to the soldering or crimping contacts 4 by suitable methods (welding, ultrasound welding or soldering).

Normalerweise werden Netzzuleitungskabel für Geräte der Unterhaltungselektronik mit einem Eurostecker versehen, der es erlaubt, jede europäische Steckdose zu benutzen. Die Konfektionierung derartiger Kabel erfolgt normalerweise derart, daß ein mit den Adern des Anschlußkabels verlöteter oder verschweißter Steckerfuß in eine Spritzgußform eingelegt und dann mit einem relativ elastischen Kunststoff umspritzt wird. Bei dem erfindungsgemäßen Netzstecker hält die Aufnahme 3 die Ringkerndrossel 5 sowie die Anschlußkontakte 4 für die Adern des Anschlußkabels beim Spritzvorgang in einer festen Position bezüglich der Grundplatte 2 mit den Steckerstiften 1 , so daß diese Teile beim Umspritzen mit Kunststoff nicht unabsichtlich verschoben werden können. Der Kern der Ringkerndrossel ergibt zusammen mit der Aufnahme einen mechanisch sehr kompakten Aufbau, bei dem auch die Spulen unverrückbar festgelegt sind, und die stromkompensierte Ringkerndrossel 5 ergibt darüber hinaus auch eine besonders gute Einströmstörfestigkeit.Normally, mains supply cables for consumer electronics devices are provided with a Euro plug, which allows any European socket to be used. Such cables are usually assembled in such a way that a plug base which is soldered or welded to the wires of the connecting cable is placed in an injection mold and then encapsulated with a relatively elastic plastic. In the power plug according to the invention holds the receptacle 3, the toroidal choke 5 and the contacts 4 for the wires of the connecting cable during the spraying process in a fixed position with respect to the base plate 2 with the plug pins 1, so that these parts can not be accidentally moved when encapsulated with plastic. The core of the toroidal core choke, together with the receptacle, results in a mechanically very compact structure, in which the coils are also immovably fixed, and the current-compensated toroidal core choke 5 also results in particularly good inflow immunity to interference.

In der Zeichnung ist das durch Umspritzen der übrigen Steckerteile gebildete Steckergehäuse nur mit seinem Außenumriß durch die gestrichelte Linie 7 dargestellt.In the drawing, the connector housing formed by extrusion coating of the other connector parts is only shown with its outer contour by the dashed line 7.

Claims (4)

  1. Mains plug for the immunity against mains-borne interference of electronic entertainment equipments which are to be connected to the mains by way of unscreened two-core leads, in the housing of which plug a coil is inserted between each of both the plug pins and a connecting terminal for the associated core of the connecting cable, characterised thereby, that both the coils form a current-compensated toroidal core choke (5) with a toroidal core retained in the plug housing.
  2. Mains plug according to claim 1, characterised thereby, that the toroidal core choke (5) is retained in the plug housing in a receptacle (3), which is injection-moulded integrally to the base plate (2) carrying the plug pins (1).
  3. Mains plug according to claim 2, characterised thereby, that the receptacle (3) on the side remote from the plug pins (1) carries two soldering or pinching contact sleeves (4) for the electrical connection of the cable cores (8).
  4. Mains plug according to claim 2 or 3, characterised thereby, that the plug housing (7) is formed at the connecting cable in the shape of a EURO-plug by injection-moulding around the remaining plug parts with an elastic synthetic material.
EP85114102A 1984-11-07 1985-11-06 Mains plug suppressing interference caused by the supply current Expired - Lifetime EP0184009B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85114102T ATE66319T1 (en) 1984-11-07 1985-11-06 MAINS PLUG FOR INSTRUMENT IMMUNITY.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3440573A DE3440573A1 (en) 1984-11-07 1984-11-07 ELECTRIC COMPENSATED THROTTLE IN A EUROSTECKER
DE3440573 1984-11-07

Publications (3)

Publication Number Publication Date
EP0184009A2 EP0184009A2 (en) 1986-06-11
EP0184009A3 EP0184009A3 (en) 1988-09-21
EP0184009B1 true EP0184009B1 (en) 1991-08-14

Family

ID=6249659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114102A Expired - Lifetime EP0184009B1 (en) 1984-11-07 1985-11-06 Mains plug suppressing interference caused by the supply current

Country Status (3)

Country Link
EP (1) EP0184009B1 (en)
AT (1) ATE66319T1 (en)
DE (1) DE3440573A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8711825U1 (en) * 1987-09-01 1988-12-29 Grässlin KG, 78112 St Georgen Electrical or electronic remote and/or time-controlled switching device
DE3842038A1 (en) * 1988-12-14 1990-06-21 Vogt Electronic Ag Plug link for European-standard plugs having an integrated inlet inductor
DE4114036A1 (en) * 1991-03-07 1992-09-10 Taller Gmbh BRACKET FOR A RING CORE THROTTLE OF AN ELECTRICAL POWER PLUG
DE4136248C2 (en) * 1991-11-04 1994-05-19 Josef Bachmann Gmbh & Co Coil connector

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1976674U (en) * 1967-10-07 1968-01-11 Walter Tatje CONNECTORS FOR ELECTRICAL CABLES.
DE2042342C3 (en) * 1970-04-23 1974-08-15 Taiyo Yuden K.K., Tokio Interference suppression plug like an adapter plug
DE3379308D1 (en) * 1982-03-26 1989-04-06 Feller Ag Device for protecting an electrical apparatus against disturbances

Also Published As

Publication number Publication date
EP0184009A3 (en) 1988-09-21
ATE66319T1 (en) 1991-08-15
EP0184009A2 (en) 1986-06-11
DE3440573A1 (en) 1986-05-07

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