EP2603920A1 - Ensemble bobine, notamment transformateur de courant alternatif, utilisation et ensemble aux fins de transmission d'énergie sans contact - Google Patents

Ensemble bobine, notamment transformateur de courant alternatif, utilisation et ensemble aux fins de transmission d'énergie sans contact

Info

Publication number
EP2603920A1
EP2603920A1 EP11721716.6A EP11721716A EP2603920A1 EP 2603920 A1 EP2603920 A1 EP 2603920A1 EP 11721716 A EP11721716 A EP 11721716A EP 2603920 A1 EP2603920 A1 EP 2603920A1
Authority
EP
European Patent Office
Prior art keywords
windings
coil
ferrite
core
coil arrangement
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.)
Granted
Application number
EP11721716.6A
Other languages
German (de)
English (en)
Other versions
EP2603920B1 (fr
Inventor
Harald Wolf
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.)
SEW Eurodrive GmbH and Co KG
Original Assignee
SEW Eurodrive GmbH and Co KG
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 SEW Eurodrive GmbH and Co KG filed Critical SEW Eurodrive GmbH and Co KG
Publication of EP2603920A1 publication Critical patent/EP2603920A1/fr
Application granted granted Critical
Publication of EP2603920B1 publication Critical patent/EP2603920B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/325—Coil bobbins

Definitions

  • Coil arrangement in particular AC transformer, use and arrangement for contactless energy transfer
  • the invention relates to a coil arrangement, in particular AC transformer, a use and an arrangement for contactless energy transfer.
  • EP 0 706 192 A1 discloses a winding arrangement in which three windings are wound at least partially overlapping around coil core sections.
  • a transformer coil winding is known in which the main field has to overcome an air gap.
  • a transformer is known, in which the main magnetic field does not substantially penetrate through a coil core which is effective for the stray field.
  • a transformer is known in which one of the windings comprises two legs of the spool core.
  • ferrite rods are referred to, which are constructed tubular and provided for inductive RF welding and / or can be used. These also include hoizylindrförmig executed ferrite cores and ferrite cores in the form of a solid cylinder, ie round rod, and also solid cylindrical or hollow cylindrical ferrite rods having two or more radial, not continuous slots. The latter
  • Ferrite rods are also denominated as feathered rod cores.
  • the tube length of the pulp is also denominated as feathered rod cores.
  • Impederkerns is at least five times or even at least ten times larger than the outer diameter of the tubular ferrite rod.
  • the invention is therefore based on the object to develop a coil assembly, the leakage flux should be specifically increased.
  • the object is in the coil assembly, in particular AC transformer, according to claim 1 or 2, in the use according to claim 14 and
  • the coil assembly in particular AC transformer, has two windings, which are arranged around a leg, in particular around a center leg, a coil core wound, wherein outer legs of the coil core, the coil assembly at least partially surrounded, wherein the outer leg and the legs are connected at their respective first end region by means of a first yoke and at their respective second end region by means of a second yoke, the windings being arranged spaced apart from one another, in particular wherein the windings are designed around the same winding axis, in particular parallel to the leg, in particular in the direction of the winding axis, wherein the spatial region generated by the spacing of the windings, in particular toroidal spatial region, is partially filled with a ferrite part, ie ferrite body, in particular with a separate ferrite part.
  • the advantage here is that the windings are not tightly wound on each other, so the
  • Winding region of the first and the second winding are spaced from each other, wherein the directly intermediate space between the winding regions of the first and second winding partially, that is not entirely filled with ferrite.
  • the windings are aligned in parallel, have a same base area and are designed as ring windings. In this way, the leakage flux between the windings can be amplified.
  • a particularly simple and fast to produce assembly can be produced by E cores as coil cores and impeller cores as ferrite parts, ie
  • the leakage flux can be selectively increased in such a way that the associated leakage inductance can be used in order to operate a resonant voltage converter adapted to resonance.
  • the leakage inductance can be dimensioned such that it forms a resonant circuit with a capacitance whose inductance is in the order of magnitude of the main inductance.
  • a first winding and a second winding are arranged inductively coupled, wherein the windings are designed around a coil core, wherein the coil core is designed such that the main flux generated by one of the windings without air gap in the coil core is guided, wherein the windings are arranged spaced from each other, wherein a ferrite portion is arranged in the generated by the spacing space between the windings for influencing the magnetic resistance for the leakage flux, that is, for influencing the leakage inductance of the coil assembly.
  • the advantage here is that the leakage flux can be specifically increased by means of the ferrite parts, in particular impedance cores.
  • the spool core for guiding the main flow on two yokes, a middle leg and an outer leg is simple and inexpensive executable.
  • the spool core is designed in two pieces or in several pieces.
  • the advantage here is that an elongated structure, ie in the transverse direction to the winding axis or the connecting direction between the upper part and lower part, ie first and second winding, is possible.
  • the connection direction is here so the
  • the extent in the transverse direction is preferably greater than the extent in the direction of the winding axis or in the connection direction from the center of gravity of the first to the center of gravity of the second winding.
  • the ferrite extends tangentially to the winding, It is advantageous that in the transverse direction so much ferrite material is introduced, so even the highest possible gain of the leakage flux can be achieved.
  • the ferrite part and the coil core are spaced apart.
  • the advantage here is that an air gap is present for the leakage flux and thus the leakage flux, the main flow, which is guided without air gap in ferrite, only insignificantly influenced.
  • the ferrite part is made so small that in non-saturated operation of the spool core, in particular the center leg, a saturated operation of the spool core is executable.
  • the advantage here is that the leakage flux takes only a small amount of the amount of the main flow.
  • the windings are arranged on a bobbin, in particular wherein the bobbin is a one-piece plastic part.
  • the advantage here is that the bobbin is manufactured as a plastic injection molded part.
  • the windings are flat windings or
  • the spool core is constructed in several pieces
  • an upper part and a lower part in particular wherein upper part and lower part are made similar, in particular as an E-shaped part.
  • the advantage here is that a simple production by merely joining the E-cores is executable.
  • the ferrite part is then laterally, ie in the direction of those normal, which belongs to the plane formed by the E, insertable into a designated, formed by the bobbin, lying between the winding areas space area.
  • an upper part of the coil core is composed of a plurality of parallel E cores, wherein the E cores are stacked one behind the other in the direction perpendicular to the winding axis, wherein a lower part of the coil core is composed of a plurality of parallel E cores, wherein the E cores stacked one behind the other are in the for Winding axis vertical direction.
  • Ferrite reduced to less than a fifth, in particular to less than a tenth.
  • the advantage here is that although the leakage flux passes through an air gap and thus a high magnetic resistance is assigned.
  • the ferrite part is formed from one or more ferrite rods, wherein the rods are aligned perpendicular to the winding axis, in particular wherein the ferrite rods are importer cores, in particular so for
  • Standard parts are used in a new use, namely in a transformer to increase the leakage flux strength.
  • the windings are designed as a two-chamber winding, in particular so the bobbin is designed such that the windings are designed as a two-chamber winding.
  • the advantage here is that the bobbin keeps the two windings at a distance.
  • the bobbin on a receiving area for the ferrite, so that between the ferrite and the windings each material of the
  • Coil body is arranged.
  • the advantage here is that the bobbin the
  • the ferrite part and / or the ferrite rods are arranged displaceably for fine adjustment of the leakage inductance.
  • the advantage here is that a fine adjustment of the leakage inductance is possible.
  • impeder cores are used as a coil core in a coil assembly.
  • the advantage here is that of welding devices known components are also useful for increasing stray inductances in transformers.
  • a secondary winding is inductively coupled to a primary conductor, wherein the secondary winding such a first capacitance in parallel or in series
  • the associated resonant frequency of the resonant circuit thus produced substantially corresponds to a frequency of a medium-frequency alternating current impressed in the primary conductor, in particular wherein the frequency is between 10 and 500 kHz, wherein for inductive coupling, a coil assembly is used according to one of the preceding claims and a Stray inductance of the coil assembly with an output side connected to the secondary winding second capacitor also on
  • Resonance is tuned to the frequency, in particular by appropriate alignment, arranging and dimensioning of the ferrite, in particular to form an inverse gyrator, so to form a transducer from the current source to voltage source-like behavior.
  • the advantage here is that the leakage inductance can be used in a resonant circuit, which converts the current originating from the secondary winding, ie from the current source to the voltage source behavior.
  • the secondary winding is part of a resonant circuit in which the current flows.
  • the leakage inductance is dimensioned in this way and by the
  • FIG. 1 shows a schematic cross section through an arrangement according to the invention.
  • FIG. 3 shows an oblique view from outside, wherein the windings
  • the coil core has a core portion 1 and 10, wherein the core portions are formed in an E-shape, that is, each having a yoke with two outer legs and a middle leg, wherein the yoke connects first respective end portions of the legs.
  • the two core portions (1, 10) are joined together with the other end portions of their legs facing each other, wherein the legs touch each other.
  • the core portions (1, 10) are made similar. But at least the leg length, in particular so the spacing of the other end portions of the legs of the yoke in each case the same, in particular also the cross section and / or length.
  • the secondary winding 3 is arranged, wherein the windings are wound on the bobbin 5 and in the winding direction, ie in
  • At least one core part 4, in particular ferrite, is arranged so that this core part 4 is operable in saturation, if in the middle leg no saturation is present. If a higher field strength is present in the middle leg, so to speak some field lines of the leakage inductance pass by the core part 4 undisturbed.
  • the air gap of the space area so the distance between the middle leg and outer leg of the E-core, by the introduction of the ferrite 4, ie Nem the core is effectively reduced, since the space is filled not only with air or bobbin material but also partially with ferrite material of the ferrite 4.
  • the effective effective air gap is thus less than one fifth or even less than one tenth of the original air gap.
  • ferrite rods 4 are not only cylindrical rods but also flattened on its longitudinal side designed rods, since thus the leakage flux is further increased.
  • the bobbin 5 is made in one piece and takes on both windings, ie
  • the field lines of the stray field in contrast to the field lines of the main field not completely in the core material, in particular ferrite run. This is especially true in unsaturated areas.
  • the invention is therefore particularly easy to manufacture and inexpensive to produce by the use of commercially available E-cores and commercially available Impeder cores.
  • impeller cores are commonly used in welding, but are very useful for the present coil assembly.
  • the present coil arrangement can also be used as a transformer with only two windings. In further education is the
  • the E-core 1 is replaced by a stack of gel-like E-cores.
  • the E-core 10 is replaced by such a stack. In this way, an elongated structure of the coil arrangement is made possible and thus a further increase in the leakage flux can be achieved. Because in the receiving area of the bobbin 5

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

L'invention concerne un ensemble bobine, notamment un transformateur de courant alternatif, présentant deux enroulements qui sont enroulés autour d'une jambe, notamment autour d'une jambe centrale, d'un noyau de bobine; des jambes extérieures du noyau de bobine entourant au moins partiellement l'ensemble bobine; les jambes extérieures et ladite jambe sont reliées respectivement par leur première zone terminale à l'aide d'une première culasse et respectivement par leur deuxième zone terminale à l'aide d'une deuxième culasse; les enroulements sont mutuellement distants, notamment les enroulements sont réalisés autour du même axe d'enroulement qui s'étend notamment parallèlement à la jambe notamment en direction de l'axe d'enroulement; l'espace notamment torique, produit par la distance séparant les enroulements, est partiellement rempli d'une pièce en ferrite,donc d'un corps en ferrite, notamment d'une pièce en ferrite distincte.
EP11721716.6A 2010-08-09 2011-05-17 Ensemble bobine, notamment transformateur de courant alternatif, utilisation et ensemble aux fins de transmission d'énergie sans contact Active EP2603920B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010033812 DE102010033812A1 (de) 2010-08-09 2010-08-09 Spulenanordnung, insbesondere Wechselstrom-Transformator, Verwendung und Anordnung zur berührungslosen Energieübertragung
PCT/EP2011/002440 WO2012019663A1 (fr) 2010-08-09 2011-05-17 Ensemble bobine, notamment transformateur de courant alternatif, utilisation et ensemble aux fins de transmission d'énergie sans contact

Publications (2)

Publication Number Publication Date
EP2603920A1 true EP2603920A1 (fr) 2013-06-19
EP2603920B1 EP2603920B1 (fr) 2016-03-02

Family

ID=44583584

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11721716.6A Active EP2603920B1 (fr) 2010-08-09 2011-05-17 Ensemble bobine, notamment transformateur de courant alternatif, utilisation et ensemble aux fins de transmission d'énergie sans contact

Country Status (3)

Country Link
EP (1) EP2603920B1 (fr)
DE (1) DE102010033812A1 (fr)
WO (1) WO2012019663A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020001811A1 (fr) 2018-06-29 2020-01-02 Sew-Eurodrive Gmbh & Co. Kg Transformateur comprenant un noyau annulaire et système d'alimentation électrique d'une charge

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017209630A1 (fr) 2016-06-01 2017-12-07 Powerbyproxi Limited Joint électrique à transfert sans fil
US10978911B2 (en) 2016-12-19 2021-04-13 Apple Inc. Inductive power transfer system
WO2023198387A1 (fr) 2022-04-11 2023-10-19 Sew-Eurodrive Gmbh & Co. Kg Transformateur à noyau annulaire
AT526570A1 (de) * 2022-10-04 2024-04-15 Egston System Electronics Eggenburg Gmbh Spulenanordnung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954901C (de) 1943-12-22 1956-12-27 Siemens Ag Transformator fuer elektrische Lichtbogenschweissung mit Streueisenkern
US4608471A (en) * 1985-03-05 1986-08-26 Allied Tube & Conduit Corporation Impeder with aggregate ferromagnetic core
JPH07297055A (ja) 1994-04-26 1995-11-10 Matsushita Electric Ind Co Ltd チョークコイル
JP3509436B2 (ja) 1996-12-02 2004-03-22 松下電器産業株式会社 ノイズフィルタ
DE202005008726U1 (de) 2004-06-07 2005-08-04 Fronius International Gmbh Transformator
US20060125591A1 (en) * 2004-12-15 2006-06-15 Taipei Multipower Electronics Co., Ltd. [high voltage transformer]
TWI250537B (en) * 2005-02-05 2006-03-01 Darfon Electronics Corp Light tube driving circuit and transformer thereof
DE102009020503B4 (de) * 2008-06-17 2013-03-14 Sew-Eurodrive Gmbh & Co. Kg Maschine zur Umwandlung von Strömungsenergie

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012019663A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020001811A1 (fr) 2018-06-29 2020-01-02 Sew-Eurodrive Gmbh & Co. Kg Transformateur comprenant un noyau annulaire et système d'alimentation électrique d'une charge

Also Published As

Publication number Publication date
DE102010033812A1 (de) 2012-02-09
EP2603920B1 (fr) 2016-03-02
WO2012019663A1 (fr) 2012-02-16

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