EP2284848B1 - Transmetteur - Google Patents

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Publication number
EP2284848B1
EP2284848B1 EP10172700.6A EP10172700A EP2284848B1 EP 2284848 B1 EP2284848 B1 EP 2284848B1 EP 10172700 A EP10172700 A EP 10172700A EP 2284848 B1 EP2284848 B1 EP 2284848B1
Authority
EP
European Patent Office
Prior art keywords
winding
core
primary
current transformer
substrate
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.)
Active
Application number
EP10172700.6A
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German (de)
English (en)
Other versions
EP2284848A1 (fr
Inventor
Jörg BLANKE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Phoenix Contact GmbH and Co KG
Original Assignee
Phoenix Contact GmbH and Co KG
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Filing date
Publication date
Application filed by Phoenix Contact GmbH and Co KG filed Critical Phoenix Contact GmbH and Co KG
Publication of EP2284848A1 publication Critical patent/EP2284848A1/fr
Application granted granted Critical
Publication of EP2284848B1 publication Critical patent/EP2284848B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/04—Fixed transformers not covered by group H01F19/00 having two or more secondary windings, each supplying a separate load, e.g. for radio set power supplies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/027—Casings specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type

Definitions

  • the invention relates to a transformer having a primary core with a primary winding, a first secondary core with a first secondary winding and a second secondary core with a second secondary winding.
  • isolation amplifiers can be used for galvanic isolation, conversion, amplification and / or filtering of standard, standard signals and adaptation of analog signals.
  • the isolation amplifiers are often galvanically isolated from each other in the input, output and / or supply circuit. The separation avoids the influence of different sensor and actuator circuits among each other by interrupting the ground loops caused by grounding of the various circuits.
  • the galvanic isolation is carried out for example by inductive passive components, which have the property to transmit electrical energy.
  • a well-known from the prior art passive device is, for example, the transformer that allows the up or down transforming AC voltages.
  • a transformer which is not used for energy transmission, but is used for analog information transmission, is referred to in the art as a transformer.
  • Such a transformer can be used for the transmission of energy and / or signals, wherein both aforementioned electronic components according to the same principle of an inductive component function.
  • the electronic components of isolation amplifiers, in particular of the transformer mounted on printed circuit boards, wherein the circuit board is arranged in an insulating material and equipped with screw, plug or spring connection technology.
  • Such Isolierstoffgeophuse can be snapped onto mounting rails to EN 50022 and thus mounted, for example, in cabinets.
  • the known from the prior art transformers usually have a core and a plurality of windings on the core.
  • the core is designed, for example, as a magnetic core of a soft magnetic material, that is, for example, a ferrite, while the winding is preferably made of an insulated wire.
  • the output current or the output voltage are determined by the winding ratio in such transformers, which are usually high-impedance, or when designed as current transformers transformers that are usually short-circuited in the output.
  • the known from the prior art transformer several secondary windings, so that the output voltage is present at all secondary windings, regardless of whether the output is loaded or not. Each individual output current varies depending on the load and is independent of the load of the neighboring output.
  • a current transformer or transformer in which two or more cores are connected to each other by means of a short-circuit or coupling winding to a transformer or current transformer. Two or more windings are wound on the secondary core.
  • Another transformer is from the US 3,568,035 known.
  • This transformer comprises a primary core with a primary winding, a first secondary core with a first secondary winding and a second secondary core with a second secondary winding, wherein the primary core, the first secondary core and the second secondary core are connected to each other via a short-circuit winding and the outputs of the secondary windings connected in series are, um known and, for example, above-mentioned transformers, the output currents of the secondary windings of the transformer are the DE 10 2005 041 131 distributed unevenly depending on the initial loads. However, such a non-calculable distribution of the output currents makes such transformers or current transformers unusable for many fields of application.
  • the invention has for its object to provide a transformer which has at least two outputs that reliably deliver the same power.
  • a current transformer having a primary core with a primary winding, a first secondary core with a first secondary winding and a second secondary core with a second secondary winding, wherein the primary core, the first secondary core and the second secondary core are connected to each other via a short-circuit winding and the first secondary winding and the second secondary winding are operated at the same number of turns in a short circuit.
  • a transformer or a current transformer is specified, which provides an input signal at two outputs as "doubler" such that - with the same number of turns of the first secondary winding and the second secondary winding - the same signal is available at both outputs.
  • the transformer according to the invention in a particularly simple manner the provision of the same current at the two outputs allowed, wherein the currents do not divide unevenly, for example due to different loads. Due to the fact that both secondary windings are connected in series, the current in both secondary windings is the same for the same number of turns. For different number of turns of the secondary windings, the output currents of the secondary windings behave in accordance with the ratio of the number of turns of the secondary windings.
  • input or output is understood to be the primary winding or the first secondary winding and / or the second secondary winding. Accordingly, an input voltage is applied, for example, to the primary winding, while an output voltage is applied to a secondary winding.
  • the primary core, the first secondary core and / or the second secondary core may be formed as any core for - in cooperation with a winding - arbitrary inductive component.
  • the primary core, the first secondary core and / or the second secondary core comprises a magnetic core of a soft magnetic material, but most preferably a ferrite core.
  • the primary winding, the first secondary winding, the second secondary winding and / or the short-circuit winding are / is preferably designed as an electrical conductor, such as a wire, but most preferably as an insulated wire.
  • any current can be applied to the primary winding, the first secondary winding and / or the second secondary winding.
  • the transformer is with a current of 0 to 5, 10, 20, 50th and / or 100 mA at the primary winding and / or at a secondary winding.
  • the short-circuit winding can be configured as desired. Most preferably, however, the short-circuit winding is self-contained, that is, for example, has a self-contained winding. Furthermore, it is preferred that the short-circuit winding has one, two, five or ten windings.
  • the number of turns of the first secondary winding and / or the second secondary winding can be arbitrary.
  • the number of turns of the first secondary winding is equal to the number of turns of the second secondary winding.
  • the primary core, the first secondary core and the second secondary core each have a center hole, wherein the primary winding, the first secondary winding and the second secondary winding are guided through the respective center hole and the short-circuit winding is passed through the respective center hole.
  • the primary core, the first secondary core and the second secondary core each form an inductive component, wherein the primary core, the first secondary core and the second secondary core preferably comprise a magnetic core of a soft magnetic material and the primary winding, the first secondary winding and the second secondary winding and the short-circuit winding are preferably made of insulated wire.
  • the dimensioning of the primary winding, the first secondary winding, the second secondary winding and / or the short-circuit winding can be carried out with regard to the expected voltages, currents and the number of turns.
  • the transmitter may be manufactured as any electrical component in any manner known in the art. According to a particularly preferred embodiment of the invention, however, it is provided that the transmitter has a substrate for provision on a printed circuit board, the substrate has a conductor track and the primary core, the first secondary core and / or the second secondary core can be fastened to the substrate such that the Ladder forms the short circuit winding.
  • the transmitter has a substrate for provision on a printed circuit board, the substrate has a conductor track and the primary core, the first secondary core and / or the second secondary core can be fastened to the substrate such that the Ladder forms the short circuit winding.
  • the transformer according to the invention is further configured such that the requirements for clearance and creepage distances according to the standards for ensuring intrinsic safety, also called EX standards, are met, such as the standards EN 60079-11 or EN 60079-0, that is, the primary core with the primary winding, the first secondary winding with the first secondary winding, the second secondary core with the second secondary winding and the short-circuit winding according to the EX standards dimensioned and positioned on the substrate.
  • the Conductor is dimensioned according to the expected currents and / or voltages of the short-circuit winding.
  • the conductor track is provided within the substrate, so that the substrate forms the insulation for the conductor track.
  • the substrate can also be configured as a circuit board known from the prior art for receiving the primary core and the secondary cores.
  • a second conductor track is provided on the substrate and / or on the circuit board and the conductor track is connected to the second conductor track for forming the short-circuit winding.
  • a completed short-circuit winding is provided by such a configuration.
  • the primary winding, the secondary winding, the second secondary winding and / or the short-circuit winding can be contacted with any means known from the prior art.
  • the substrate has contact surfaces for contacting the printed circuit board and / or for contacting the primary winding, the first secondary winding, the second secondary winding and / or the short-circuit winding.
  • the contact surfaces may be metallic, for example, so that by soldering, bonding or other known from the prior art means electrically conductive connections between the circuit board, the conductor track, the primary winding, the first Secondary winding, the second secondary winding, the short-circuit winding and / or external contacts can be produced.
  • soldering, bonding or other known from the prior art means electrically conductive connections between the circuit board, the conductor track, the primary winding, the first Secondary winding, the second secondary winding, the short-circuit winding and / or external contacts can be produced.
  • about such contact surfaces for example, in a particularly simple manner, an electrically conductive contact to
  • the substrate has webs for receiving the primary core, the first secondary core and / or the second secondary core, wherein the conductor track is provided in the web. Furthermore, it is preferred that the substrate has two oppositely arranged webs, the primary core is arranged on the first web and the first secondary core and the second secondary core are arranged on the second web. Most preferably, the first web and the second web are arranged spaced from each other. Furthermore, it is preferred that the conductor track of at least 0.5 mm insulating material, so for example, the substrate is surrounded. In this way, the requirements of the EX standards can be realized.
  • the primary winding, the first secondary winding and the second secondary winding by appropriate arrangement of the primary winding, the first secondary winding and the second secondary winding, the necessary to comply with the EX standards distances, and clearance and creepage distances for safe galvanic isolation, be ensured by arranging on oppositely oriented webs.
  • the short-circuit winding is uniformly distributed on both sides of the oppositely disposed webs, resulting in an improved coupling of the inductive components thus formed.
  • first secondary winding and the second secondary winding which preferably on one of the oppositely arranged webs are arranged side by side, isolated by insulation against each other.
  • insulation may be embodied, for example, as a circular disk made of a non-conductive material, wherein the insulation preferably has a center hole, so that the insulation can also be arranged on the web as the first secondary core and the second secondary core.
  • the substrate is designed as a planar substrate and / or the substrate is mountable on the printed circuit board in SMD technology. Furthermore, it is preferable for the substrate to have a suction surface, so that a vacuum suction device can suck in, transport the substrate, position it over the printed circuit board and deposit it.
  • the transformer is realized in a particularly space-saving manner and can also be used in limited space.
  • the short-circuit winding has at least one winding.
  • the primary core, the first secondary core and / or the second secondary core are each embodied as toroidal cores or as rectangular cores.
  • Very particularly preferred is the use of a transformer according to the invention as a current transformer.
  • the transformer has at least three secondary cores, each secondary core has a respective secondary winding, and the primary core and the secondary cores are connected to each other via the short-circuit winding. Accordingly, it is therefore preferred that the
  • Transmitter in addition to the first secondary core and the second secondary core has at least one further secondary core with a respective further secondary winding, wherein the other secondary cores and the primary core, the first secondary core and the second secondary core are also connected to each other via the short-circuit winding. Further embodiments of the other secondary cores or further secondary windings are obtained in analogy to the above.
  • Fig. 1-3 is a transformer with a primary core 1 with a primary winding 2, a first secondary core 3 with a first secondary winding 4 and a second secondary core 5 with a second secondary winding 6 visible.
  • the primary core 1, the first secondary core 3 and the second secondary core 5 are connected to each other via a short-circuit winding 7.
  • Such a transformer or current transformer is used to transmit power or signals galvanically isolated.
  • the number of turns N1, N2, N3 determine the output current I2, I3 or the output voltage U2, U3, depending on the input current I1 or the input voltage U1.
  • current transformers are usually short-circuited in the output, ie at the secondary winding 4, 6, while voltage transformers are terminated in the high-impedance output.
  • the secondary windings 4, 6 operated in a short circuit, so that a primary side impressed current I1 in the secondary circuits I2, I3 can flow.
  • a current I1 is impressed into the current transformer on the primary side, it is transformed into the short-circuit winding 7 with the transmission ratio of N1 to NK.
  • this transformed current IK flows as a primary current through the other partial transformers, ie the secondary cores 3, 5 with the secondary windings 4, 6, and is transformed down again with the transmission ratio NK to N2 or N3.
  • the same currents I2, I3 because the primary current, ie the short-circuit current IK of the partial transformer, is also the same size.
  • the transformer according to the invention or current transformer thus allows the galvanic separation of an input signal U1, I1 to two output signals U2, I2, U3, I3 such that at both outputs of the same current I2, I3 flows and the currents I2, I3 at the same number of turns of Do not divide windings N2 and N3 unevenly.
  • Fig. 3 shows an integratable into a printed circuit transformer SMD technology according to the invention, wherein the primary core 1, the first secondary core 3 and the second secondary core 5 having a magnetic core of a soft magnetic material, wherein the magnetic core each having a center hole, not shown, through that the primary winding 2, the first secondary winding 4 and the second secondary winding 6 and a short-circuit winding 7 designed as a conductor track are guided.
  • the designed as a conductor short-circuit winding 7 is arranged in a substrate 8.
  • the substrate 8 webs 9 for receiving the primary core 2, the first secondary core 3 and the second secondary core 5, wherein the conductor track is arranged in the web 9.
  • the primary core 2 is arranged on a first web 9 and the first secondary core 3 and the second secondary core 5 are arranged on a second web 9 at a distance from one another.
  • an insulation 10 is provided between the first secondary winding 4 and the second secondary winding 6, wherein the insulation 10 is made of an insulating material.
  • the substrate 8 also has a second conductor 11, wherein the second conductor 11 and / or provided on the circuit board trace, not shown, for forming the closed short-circuit winding 7 is usable.
  • the first secondary winding 4, the second secondary winding 6, the short-circuit winding 7 and the second conductor 11 metallic contact surfaces 12 are provided, which in known from the prior art, for example by soldering, with corresponding contacts the circuit board are connectable.
  • the transformer according to the invention thus allows in a particularly simple and compact design to provide two equal secondary side currents I2, I3, which are the same number of turns of the windings N2 and N3 regardless of the load.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Transformers For Measuring Instruments (AREA)

Claims (14)

  1. Transformateur de courant avec un noyau primaire (1) doté d'un enroulement primaire (2), un premier noyau secondaire (3) doté d'un premier enroulement secondaire (4) et un deuxième noyau secondaire (5) doté d'un deuxième enroulement secondaire (6), où le noyau primaire (1), le premier noyau secondaire (3) et le deuxième noyau secondaire (5) sont reliés entre eux par le biais d'un enroulement en court-circuit (7),
    où le premier enroulement secondaire (4) et le deuxième enroulement secondaire (6), avec un nombre d'enroulements identique, sont en fonctionnement en court-circuit.
  2. Transformateur de courant selon la revendication 1, dans lequel l'enroulement en court-circuit (7) est autonome à lui seul.
  3. Transformateur de courant selon l'une des revendications précédentes, dans lequel le noyau primaire (1), le premier noyau secondaire (3) et le deuxième noyau secondaire (5) présentent chacun un orifice central, l'enroulement primaire (2), le premier enroulement secondaire (4) et le deuxième enroulement secondaire (6) sont menés à travers l'orifice central correspondant et l'enroulement en court-circuit (7) est mené à travers l'orifice central correspondant.
  4. Transformateur de courant selon l'une des revendications précédentes, où le transformateur de courant présente un substrat (8) pour la mise en place sur une plaque conductrice, le substrat (8) présente une piste conductrice et le noyau primaire (1), le premier noyau secondaire (3) et/ou le deuxième noyau secondaire (5) peuvent être fixés sur le substrat de telle manière que la piste conductrice forme l'enroulement en court-circuit (7).
  5. Transformateur de courant selon la revendication 4, dans lequel une deuxième piste conductrice (11) est prévue sur le substrat et/ou sur la plaque conductrice et la piste conductrice est reliée avec la deuxième piste conductrice (11) pour la formation de l'enroulement en court-circuit (7).
  6. Transformateur de courant selon l'une des revendications 4 ou 5, dans lequel le substrat (8) présente des surfaces de contact (12) pour la mise en contact de la plaque conductrice et/ou pour la mise en contact de l'enroulement primaire (2), du premier enroulement secondaire (4), du deuxième enroulement secondaire (6) et/ou de l'enroulement en court-circuit (7).
  7. Transformateur de courant selon l'une des revendications 4 à 6, dans lequel le substrat (8) présente des barrettes (9) pour la réception du noyau primaire (1), du premier noyau secondaire (3) et/ou du deuxième noyau secondaire (5) et la piste conductrice est prévue dans la barrette (9).
  8. Transformateur de courant selon la revendication 7, dans lequel le substrat (8) présente deux barrettes (9) disposées en sens inverse, le noyau primaire (1) est disposé sur la première barrette (9) et le premier noyau secondaire (3) et le deuxième noyau secondaire (5) sont disposés sur la deuxième barrette (9) .
  9. Transformateur de courant selon la revendication 8, dans lequel la première barrette (9) et la deuxième barrette (9) sont disposés espacées l'une par rapport à l'autre.
  10. Transformateur de courant selon l'une des revendications précédentes, dans lequel le premier enroulement secondaire (4) et le deuxième enroulement secondaire (6) sont isolés l'un par rapport à l'autre par une isolation (10).
  11. Transformateur de courant selon l'une des revendications 4 à 10, dans lequel le substrat (8) est un substrat plan et/ou le substrat (8) peut être fixé sur la plaque conductrice dans une technique de composant monté en surface SMD.
  12. Transformateur de courant selon l'une des revendications précédentes, dans lequel l'enroulement en court-circuit (7) présente au moins un enroulement.
  13. Transformateur de courant selon l'une des revendications précédentes, dans lequel le noyau primaire (1), le premier noyau secondaire (3) et/ou le deuxième noyau secondaire (5) sont conçus respectivement sous forme de noyaux annulaires ou sous forme de noyaux rectangulaires.
  14. Transformateur de courant selon l'une des revendications précédentes, avec au moins trois noyaux secondaires (3, 5), où chaque noyau secondaire (3, 5) présente un enroulement secondaire (4, 6) respectif, et le noyau primaire (1) et les noyaux secondaires (3, 5) sont reliés entre eux par le biais de l'enroulement en court-circuit (7).
EP10172700.6A 2009-08-14 2010-08-12 Transmetteur Active EP2284848B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009037340A DE102009037340A1 (de) 2009-08-14 2009-08-14 Übertrager

Publications (2)

Publication Number Publication Date
EP2284848A1 EP2284848A1 (fr) 2011-02-16
EP2284848B1 true EP2284848B1 (fr) 2018-08-01

Family

ID=42941875

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10172700.6A Active EP2284848B1 (fr) 2009-08-14 2010-08-12 Transmetteur

Country Status (4)

Country Link
US (1) US20110043319A1 (fr)
EP (1) EP2284848B1 (fr)
CN (1) CN101996738A (fr)
DE (1) DE102009037340A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012111069A1 (de) 2012-11-16 2014-05-22 Phoenix Contact Gmbh & Co. Kg Planarübertrager
EP3528386B1 (fr) * 2014-07-11 2022-12-21 Eagle Harbor Technologies, Inc. Générateur d'impulsions nanosecondes haute tension à largeur d'impulsion et fréquence de répétition d'impulsion variables

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1808670A (en) * 1929-03-20 1931-06-02 Cfcmug Transformer
SE369649B (fr) * 1968-03-20 1974-09-09 Commissariat Energie Atomique
US3590480A (en) * 1968-10-03 1971-07-06 Theodore H Johnson Jr Method of manufacturing a pulse transformer package
US3525922A (en) * 1968-12-23 1970-08-25 Abbey Harold Current-balancing systems for parallel diodes
JPS5145942B2 (fr) * 1972-10-12 1976-12-06
DE2529296A1 (de) * 1975-07-01 1977-01-20 Ferranti Ltd Impuls-transformator
DE2724920C2 (de) * 1977-06-02 1982-08-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Hochspannungsfeste Signalübertragungseinrichtung mit einem Trennübertrager
FR2481545A1 (fr) * 1980-04-29 1981-10-30 Thomson Csf Interrupteur statique haute tension, applicable notamment a un generateur haute tension commutable
US4538346A (en) * 1981-09-14 1985-09-03 Sfe Technologies, Inc. Method for manufacture of selectively coated carrier plate
DE3218823C2 (de) * 1982-04-22 1984-06-20 LGZ Landis & Gyr Zug AG, Zug Meßwandleranordnung mit zwei Magnetkernen
US4952853A (en) * 1988-08-24 1990-08-28 General Electric Company Method and apparatus for sensing direct current of one polarity in a conductor and electronically commutated motor control responsive to sensed motor current
CN2295269Y (zh) * 1997-05-07 1998-10-21 浙江阳光集团公司 一种脉冲变压器
DE102005041131B4 (de) * 2005-08-30 2008-01-31 Phoenix Contact Gmbh & Co. Kg Übertrager

Also Published As

Publication number Publication date
DE102009037340A1 (de) 2011-08-04
US20110043319A1 (en) 2011-02-24
EP2284848A1 (fr) 2011-02-16
CN101996738A (zh) 2011-03-30

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