EP3018664A1 - Magnetic core for an an electrical induction device - Google Patents

Magnetic core for an an electrical induction device Download PDF

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Publication number
EP3018664A1
EP3018664A1 EP14192071.0A EP14192071A EP3018664A1 EP 3018664 A1 EP3018664 A1 EP 3018664A1 EP 14192071 A EP14192071 A EP 14192071A EP 3018664 A1 EP3018664 A1 EP 3018664A1
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EP
European Patent Office
Prior art keywords
yoke
leg
laminated
core
magnetic core
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
EP14192071.0A
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German (de)
French (fr)
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EP3018664B1 (en
Inventor
Jörg FINDEISEN
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Siemens Energy Global GmbH and Co KG
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Siemens AG
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Priority to EP14192071.0A priority Critical patent/EP3018664B1/en
Publication of EP3018664A1 publication Critical patent/EP3018664A1/en
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Publication of EP3018664B1 publication Critical patent/EP3018664B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/02—Cores, Yokes, or armatures made from sheets
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together

Definitions

  • the invention relates to a magnetic core for an electrical induction device with the features according to the preamble of patent claim 1.
  • three-phase transformers are known in which the iron core consists of lying in a plane legs and upper and lower yoke bars that connect the legs. The legs are enclosed by windings which are insulated from each other and from ground. In order to easily control the radial winding forces occurring in the event of a short circuit, windings with circular coils are preferred for power transformers of the type described, which windings are placed on the legs of the transformer core.
  • the cross section of the limbs is usually carried out in a circular manner with a multi-stepped edge.
  • the staging of the leg is usually continued in the yoke to obtain the same cross section for each stage over the entire magnetic circuit and to ensure a trouble-free magnetic flux.
  • the object of the invention is to achieve a magnetic flux improved in the case of stepped magnetic cores compared with the prior art.
  • the invention provides that at least one of the legs of the magnetic core carries a winding and this leg carrying the winding is circular in cross-section with a stepped outer edge and the centers of the laminated cores of this leg lie on a straight line and at least one of these legs adjacent laminated yokes, the laminated cores are aligned such that the laminated core centers of outer laminated cores are offset from the laminated core center middle laminations in the direction of this leg to form a Jochquer songs resonance in which the geometric centroid is shifted relative to the laminated center of the middle laminated cores in the direction of this leg.
  • a significant advantage of the magnetic core according to the invention is the fact that it due to the inventively provided grading the laminated cores at the or the yokes or by the inventive departure from a circular Jochquerrough at the leg interface to a step by step reduced magnetic path (compared with conventional magnetic cores with a circular yoke cross-section) and consequently the required core sheet material can be reduced and reduced in weight.
  • the reduction of the core sheet material leads advantageously to a reduction in the Ummagnetmaschineswe. It is also possible to avoid steps in the area of the yoke edge facing the limb, so that the number of electrical peaks occurring (compared to conventional magnetic cores) can be reduced.
  • the laminated core centers of the outer laminated cores are offset in the direction of the leg such that the laminated core centers of outer laminated cores are closer to the leg than the laminated core centers of middle laminated cores.
  • the laminated cores of at least one of the yokes are aligned such that - viewed in cross-section and transverse to the stacking direction of the sheets - the centers of the laminated cores lie on a curvilinear curve which is axially symmetrical with respect to the center of the middle laminated core or the middle laminated cores.
  • the laminated cores form a straight yoke edge at the interface to the leg.
  • the laminated cores of the yoke and legs are in pairs opposite the front edge side.
  • the step height of the step corresponds in each case to twice the step height of the step, which have the end edge side opposite laminations of the leg.
  • the grading on the side facing away from the leg corresponds to twice the offset of the laminated core in the yoke or if the gradation in the region of the yoke corresponds to twice the grading in the region of the leg.
  • the yoke and leg plates preferably each have the same width for each stage.
  • the cross-sectional areas of yoke and leg are preferably the same size.
  • each laminated core of the yoke is preferably in each case just as large as the laminated core height of the front edge side opposite laminated core of the leg.
  • the laminated cores are preferably pressed together by means of a pressing device having at least two pressing units, of which at least a press unit, preferably the or a leg-near press unit, compresses all laminated cores of the yoke and of which at least one press unit, preferably the or a leg-distant press unit, compresses only a subset of the laminated core of the yoke.
  • a press unit preferably the or a leg-near press unit
  • at least one press unit preferably the or a leg-distant press unit
  • At least one of the press units of the yoke on clamping bands for transmitting the pressing force.
  • At least one of the press units has press studs which press on the yoke two outside pressing elements which are located on the outside of the yoke and face one another, for example in the form of press beams.
  • each of a portion of the yoke height pressing press units are provided with their own the press force longitudinally distributed in the yoke direction pressing bars.
  • the pressing beam opposite the leg are directly connected to the winding support or the winding tensioning device.
  • the press beams of the leg-distant yoke press unit are preferably spatially and non-positively separated from the winding support and winding tensioning device.
  • a pressing unit of at least one yoke is provided with longitudinally disposed of the yoke pressing beam and if these pressing bars are each made of a metallic material and are at least partially provided on the opposite side of the winding with an electrical shield forming round end surface.
  • the distance between the round end surface and the winding edge the winding is preferably equal to or smaller than the distance of the yoke edge to the winding.
  • At least one support element is provided for the axial strain of a winding located on the leg, which is at least partially bevelled in the yoke, and the offset of the centers of the outer laminated core of the yoke is designed such that the gradation the yoke follows the contour of the bevel of the support element.
  • the laminated cores of the yoke located under the winding are preferably shifted relative to the middle of the middle laminated core of the yoke, that the yoke edge forms a line on the side facing the leg and the winding support for supporting the winding is at least partially supported directly on this yoke edge.
  • the FIG. 1 shows a portion of a magnetic core 1 for an electric induction device.
  • the magnetic core 1 comprises an upper yoke 3, a lower yoke 4 and a leg 2 concealed by a winding 10 of the induction device, which is arranged between the upper yoke 3 and the lower yoke 4.
  • the winding 10 of the induction device is placed on the leg 2.
  • the upper yoke 3 is formed by laminated cores 31, which are pressed against each other by means of a pressing device 9.
  • the pressing device 9 comprises a lower pressing unit 91, which is arranged adjacent to the leg 2, as well as an upper Press unit 92, which is spatially separated from the leg 2 by the pressing unit 91.
  • the two press units 91 and 92 comprise in the embodiment according to FIG. 1 two press beams 93, which means by in the FIG. 1 Unillustrated billets are compressed.
  • the laminated cores 31 of the upper yoke 3 are in the magnetic core 1 according to FIG. 1 aligned in such a way that the laminated core centers on the outside of the laminated core are offset relative to the middle of the laminated core in the direction of the arm 2 in the direction of the arm 2, in which the geometrical center of gravity FP is displaced in the direction of the arm 2 relative to the center of the armature core M of the middle laminations.
  • a winding tensioning device 11 which comprises two supporting elements 110 and 111.
  • the two support elements 110 and 111 have in the direction of the leg center of the leg 2 and the middle of the yoke of the upper yoke 3 each have a sloping edge 112, at the course of the lower yoke edge 32 of the upper yoke 3 is adjusted.
  • the offset of the laminated cores 31 and the gradation of the laminated cores 31 as in FIG. 1 shown in Jochrand Scheme selected accordingly.
  • FIG. 1 moreover, shows the configuration of the lower yoke 4 in more detail. It can be seen that that lower yoke 4 is formed by laminated cores 41, which are pressed together by means of a pressing device 9.
  • the pressing device 9 comprises an upper pressing unit 91, which is arranged adjacent to the leg 2, and a pressing unit 92 arranged at a distance from the leg 2.
  • the two press units 91 and 92 each have opposing press bars 93, which are pressed together by means not shown pressing bolts.
  • the laminated cores 41 are aligned at the lower yoke 4 such that the laminated core centers of the outer laminated cores are offset from the middle of the laminated core middle laminations in the direction of the leg 2 to form a Jochquerroughs Solution, in which the geometric centroid FP relative to the center M of the middle laminated cores in the direction of Schenkels 2 is moved.
  • the offset of the laminated cores 41 is also chosen such that at the interface to the leg 2 a straight yoke edge 42 is formed on which a winding support 12, which carries the winding 10, rests.
  • the yoke edge of the lower yoke 4 facing the limb 2 is preferably rectilinear, whereas the lower yoke edge 32 of the upper yoke 3 is preferably non-linear with a view to adapting the yoke edge to the support elements 110 and 111.
  • an insulating arrangement 101 is preferably provided in each case.
  • FIG. 2 shows the cross section of the leg 2 of the magnetic core 1 according to FIG. 1 in cross section. It can be seen that the leg 2 is formed from a plurality of laminated cores 21. In cross section, the leg 2 is circular with a stepped outer edge. The centers of the laminated cores of the leg 2 lie on a straight line 22.
  • FIG. 3 shows in cross section a further embodiment of an upper yoke 3, which in the magnetic core 1 according to FIG. 1 can be used. It can be seen that the centers of the laminated cores 31 lie on a curvilinear curve 36, which is preferably axisymmetric with respect to the middle of the yoke of the upper yoke 3. In addition, the leaves FIG. 3 recognize that the centroid FP of the upper yoke 3 is shifted in the direction of the lower yoke edge 32 with respect to the laminated core center M of the middle laminations.
  • FIG. 4 again shows the lower yoke of the magnetic core 1 according to FIG. 1 in cross section. It can be seen that the laminated core centers of the laminated cores 41 of the lower yoke 4 lie on a curvilinear curve 46, which is preferably axially symmetrical with respect to the center of the middle laminated core of the lower yoke 4.
  • Figure 4 shows the offset of the centroid FP with respect to the laminated core center M of the middle laminated core of the lower yoke 4; It can be seen that the centroid FP in the direction of the to the winding support 12 (see. FIG. 1 ) adjacent Jochkante 42 is shifted.
  • FIG. 5 shows an embodiment of a three-legged magnetic core 1 for an electrical induction device, which has three windings 10 in addition to the magnetic core 1.
  • Each of the windings 10 is in each case placed on a leg 2 of the three-arm magnetic core 1.
  • the FIG. 5 moreover shows pressing bolt 94, which serve for pressing the laminated cores of the upper yoke 3 and the lower yoke 4.
  • the press studs 94 preferably form components of press units, such as those in the press units 91 and 92, respectively FIG. 1 of which at least one preferably does not cover the entire layer thickness of the respective yoke and of which at least one other preferably comprises the entire layer thickness of the respective yoke.
  • a segmentation of the respective yoke in a leg-proximal portion 3a and 4a and a leg distant portion 3b and 4b may be provided, as indicated by lines L in the FIG. 5 is indicated.
  • FIG. 6 shows the compression of the laminated cores at the upper yoke 3 of the magnetic core 1 according to FIG. 5 exemplary closer in detail.
  • a pressing device 9 which comprises a pressing unit 91 and a pressing unit 92.
  • the pressing unit 91 has two opposing pressing bars 93, pressing pins 94 and two pressing inserts 95.
  • the function of the Pressbeilageieri 95 is to ensure a uniform contact pressure on Blechunprocessn away.
  • the pressing unit 91 serves to compress all laminated cores of the yoke.
  • the pressing unit 92 also has two pressing bars 93, pressing pins 94 and two pressing inserts 95. In contrast to the pressing unit 91, the pressing unit 92 presses together only a subset of the laminated core of the yoke.
  • FIG. 7 shows the two pressing devices 91 and 92 according to FIG. 6 closer in detail in a three-dimensional representation obliquely from the side.
  • FIG. 8 shows a preferred, modified embodiment for the pressing unit 91, which is immediately adjacent to the winding 10.
  • the pressing bars 93 of the pressing unit 91 are each provided with an electrical shield 96 in the region of their lower beam edges opposite the winding 10.
  • the electrical shield preferably has a round end surface in cross section, whose distance from the winding edge of the Winding 10 is equal to or smaller than the distance of the lower Jochkante 32 of the yoke 3 of the winding 10.
  • the pressing beam 93 and the electrical shield 96 are preferably made of metallic material.
  • the yoke edge 32 facing the winding 10 is shielded by the electrical shield 96 integrated in the press unit 91.
  • the pressing unit 91 is preferably extended downwards so that a projection to the yoke edge 32 is formed, and it is preferably a rounding of the pressing unit 91 in the region of this overlap.
  • FIG. 9 shows an embodiment of a three-legged magnetic core 1 for an induction device, which is equipped with three windings 10. It can be seen that the three legs 2 of the magnetic core 1 are interconnected by means of an upper yoke 3 and a lower yoke 4.
  • clamping bands 200 for example in the form of bandages, provided which can be passed through holes or slots in the respective yoke.
  • segmentation of the respective yoke may be provided in a leg-proximal portion and a leg-distal portion such that each of the tension bands 200 braces either the leg-distal or thigh-proximal segment.
  • FIG. 5 With regard to the segmentation into a leg - distant or thigh - related segment, reference should be made to the explanations in connection with FIG. 5 referenced, which apply analogously here.
  • FIG. 10 shows in a cross section an embodiment for the bracing of the upper yoke 3 and the lower yoke 4, respectively FIG. 9 closer in detail.
  • the two press units 91 and 92 each have a clamping band 200, which serves to clamp the laminated cores of the respective yoke segment.
  • the two press units 91 and 92 preferably also press-insert elements 95, as already in connection with the FIGS. 6 and 7 have been explained.
  • the laminations of the yoke may be segmented into one or more legs remote and in one or more leg-proximal segments;
  • the leg near press unit 91 may compress the leg near segment of the yoke and the leg distal press unit 92, the leg distant segment of the yoke.
  • the yoke may be provided with holes through which the tension bands 200 are pulled.
  • the tension bands (200) of the leg-near press unit (91) and the tension bands of the leg-distant press unit (92) are arranged offset in the direction of the yoke axis.
  • the clamping bands of the leg-near pressing unit and the clamping bands of the leg-distant pressing unit can each use the same gap between the yoke segments.
  • the number of tension bands (200) of the leg-distant press unit (92) can be increased in relation to the number of tension bands of the leg-near press unit (91) in order to achieve a favorable distribution of the pressing forces on the yoke.
  • FIG. 11 shows the two pressing devices 91 and 92 with the tension bands 200 according to FIG. 10 in the upper yoke 3 in a three-dimensional representation closer in detail.
  • FIG. 12 shows an embodiment in which the laminated cores 31 of the yoke 3 at least partially not the same sheet metal width as the associated laminated core of the leg 2.
  • the design of the laminated cores of the leg takes place as in the aforementioned examples such that a circular shape approximated leg 2 is formed. This is enclosed by the winding 10.
  • the yoke 3 has a number of core stages reduced in relation to the leg.
  • Several laminated cores 31 of the yoke have a same sheet width.
  • the adaptation of the cross sections of leg and yoke takes place in the exemplary embodiment laminated core.
  • a reduction of the core height, as well as a simplification of the press units is possible.
  • the laminated cores form in this embodiment at the cutting edge to the leg a straight yoke edge 32nd
  • the pressing of the yoke is subdivided into several pressing regions, which are clamped by separate pressing units (91, 92).
  • the leg-facing pressing devices 91 of the yoke 3 are connected to each other by parallel to the leg axis extending tension members 98 for winding tension.
  • these tension elements 98 can be formed by tie rods located outside the winding, by tie rods lying on the leg within the winding or by plastic pull elements running within the core or the winding.
  • the fastening elements 99 for lifting the active part are each connected only to the pressing unit 91 of a portion of the yoke.
  • the leg-distant press units 92 preferably have no connection to the winding tensioning devices, the winding supports and the tensile elements 98 for winding tensioning and the fastening elements 99 for lifting the active part. The force effects of these functions must therefore not be taken into account in the dimensioning of the leg-distant pressing devices 92.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

Die Erfindung bezieht sich auf einen Magnetkern (1) für eine elektrische Induktionseinrichtung, der zumindest zwei Schenkel (2) und mindestens zwei die Schenkel (2) an ihren Enden verbindende Joche (3, 4) aufweist, wobei die Joche (3, 4) und die Schenkel (2) jeweils aus Blechpaketen (31, 41) zusammengesetzt sind und der Querschnitt der Schenkel (2) und der der Joche (3, 4) durch die Blechpaketbreite der aufeinander liegenden Blechpakete (31, 41) und die sich daraus ergebende Stufung bestimmt wird. Erfindungsgemäß ist vorgesehen, dass zumindest einer der Schenkel (2) des Magnetkernes eine Wicklung (10) trägt und dieser die Wicklung (10) tragende Schenkel (2) im Querschnitt kreisförmig mit einem gestuften äußeren Rand ist und die Mitten der Blechpakete (31, 41) dieses Schenkels (2) auf einer geraden Linie liegen und bei zumindest einem der an diesen Schenkel (2) angrenzenden Joche (3, 4) die Blechpakete (31, 41) derart ausgerichtet sind, dass die Blechpaketmitten außenliegender Blechpakete (31, 41) gegenüber der Blechpaketmitte mittlerer Blechpakete (31, 41) in Richtung dieses Schenkels (2) unter Bildung einer Jochquerschnittsfläche versetzt sind, bei der der geometrische Flächenschwerpunkt (FP) gegenüber der Blechpaketmitte der mittleren Blechpakete (31, 41) in Richtung dieses Schenkels (2) verschoben ist.The invention relates to a magnetic core (1) for an electrical induction device, which has at least two legs (2) and at least two yokes (3, 4) connecting the legs (2) at their ends, the yokes (3, 4) and the legs (2) are each composed of laminated cores (31, 41) and the cross section of the legs (2) and of the yokes (3, 4) through the laminated core width of the stacked laminated cores (31, 41) and the resulting Grading is determined. According to the invention, at least one of the legs (2) of the magnetic core carries a winding (10) and this leg (2) supporting the winding (10) is circular in cross-section with a stepped outer edge and the centers of the laminated cores (31, 41 ) of this leg (2) lie on a straight line and in at least one of these legs (2) adjacent yokes (3, 4) the laminated cores (31, 41) are aligned such that the laminated core centers outside sheet packs (31, 41) relative to the laminated core center middle laminations (31, 41) in the direction of this leg (2) are offset to form a Jochquerschnittsfläche in which the geometric centroid (FP) relative to the laminated core of the middle laminations (31, 41) in the direction of this leg (2) is moved.

Description

Die Erfindung bezieht sich auf einen Magnetkern für eine elektrische Induktionseinrichtung mit den Merkmalen gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a magnetic core for an electrical induction device with the features according to the preamble of patent claim 1.

Aus dem Bereich der elektrischen Energieverteiltechnik sind Drehstromtransformatoren bekannt, bei denen der Eisenkern aus in einer Ebene liegenden Schenkeln sowie aus oberen und unteren Jochbalken besteht, die die Schenkel verbinden. Die Schenkel sind von Wicklungen umschlossen, die gegeneinander und gegen Erde isoliert sind. Um die bei Kurzschluss auftretenden radialen Wicklungskräfte einfach zu beherrschen, werden für Leistungstransformatoren der beschriebenen Art Wicklungen mit kreisförmigen Spulen bevorzugt, welche auf die Schenkel des Transformatorkerns aufgesetzt werden. Um für den Kernschenkel einen hohen Füllfaktor (optimale Füllung des kreisförmigen Querschnitts der Wicklung mit magnetischem Material) zu erreichen, wird der Querschnitt der Schenkel üblicherweise kreisförmig mit mehrfach abgestuftem Rand ausgeführt. Bei dreischenkeligen Drehstromtransformatoren wird die Stufung des Schenkels üblicherweise im Joch fortgeführt, um für jede Stufe über den gesamten Magnetkreis den gleichen Querschnitt zu erhalten und einen störungsfreien Magnetfluss zu gewährleisten.From the field of electrical power distribution technology three-phase transformers are known in which the iron core consists of lying in a plane legs and upper and lower yoke bars that connect the legs. The legs are enclosed by windings which are insulated from each other and from ground. In order to easily control the radial winding forces occurring in the event of a short circuit, windings with circular coils are preferred for power transformers of the type described, which windings are placed on the legs of the transformer core. In order to achieve a high filling factor for the core limb (optimum filling of the circular cross section of the winding with magnetic material), the cross section of the limbs is usually carried out in a circular manner with a multi-stepped edge. In three-legged three-phase transformers, the staging of the leg is usually continued in the yoke to obtain the same cross section for each stage over the entire magnetic circuit and to ensure a trouble-free magnetic flux.

Der Erfindung liegt die Aufgabe zugrunde, bei gestuften Magnetkernen einen gegenüber dem Stand der Technik verbesserten Magnetfluss zu erreichen.The object of the invention is to achieve a magnetic flux improved in the case of stepped magnetic cores compared with the prior art.

Diese Aufgabe wird erfindungsgemäß durch einen Magnetkern mit den Merkmalen gemäß Patentanspruch 1 gelöst. Vorteilhafte Ausgestaltungen des erfindungsgemäßen Magnetkerns sind in den Unteransprüchen angegeben.This object is achieved by a magnetic core having the features according to claim 1. Advantageous embodiments of the magnetic core according to the invention are specified in the subclaims.

Danach ist erfindungsgemäß vorgesehen, dass zumindest einer der Schenkel des Magnetkernes eine Wicklung trägt und dieser die Wicklung tragende Schenkel im Querschnitt kreisförmig mit einem gestuften äußeren Rand ist und die Mitten der Blechpakete dieses Schenkels auf einer geraden Linie liegen und bei zumindest einem der an diesen Schenkel angrenzenden Joche die Blechpakete derart ausgerichtet sind, dass die Blechpaketmitten außenliegender Blechpakete gegenüber der Blechpaketmitte mittlerer Blechpakete in Richtung dieses Schenkels unter Bildung einer Jochquerschnittsfläche versetzt sind, bei der der geometrische Flächenschwerpunkt gegenüber der Blechpaketmitte der mittleren Blechpakete in Richtung dieses Schenkels verschoben ist.Thereafter, the invention provides that at least one of the legs of the magnetic core carries a winding and this leg carrying the winding is circular in cross-section with a stepped outer edge and the centers of the laminated cores of this leg lie on a straight line and at least one of these legs adjacent laminated yokes, the laminated cores are aligned such that the laminated core centers of outer laminated cores are offset from the laminated core center middle laminations in the direction of this leg to form a Jochquerschnittsfläche in which the geometric centroid is shifted relative to the laminated center of the middle laminated cores in the direction of this leg.

Ein wesentlicher Vorteil des erfindungsgemäßen Magnetkerns ist darin zu sehen, dass es aufgrund der erfindungsgemäß vorgesehenen Stufung der Blechpakete bei dem oder den Jochen bzw. durch die erfindungsgemäße Abkehr von einem kreisförmigen Jochquerschnitt an der Schenkelschnittstelle zu einem von Stufe zu Stufe verringerten magnetischen Weg (verglichen mit herkömmlichen Magnetkernen mit kreisförmigem Jochquerschnitt) kommt und sich demzufolge das erforderliche Kernblechmaterial verringern und Gewicht reduzieren lässt. Die Verminderung des Kernblechmaterials führt in vorteilhafter Weise auch zu einer Reduzierung der Ummagnetisierungsverluste. Auch lassen sich Stufen im Bereich der dem Schenkel zugewandten Jochkante vermeiden, so dass sich die Anzahl der auftretenden elektrischen Spitzen (verglichen mit herkömmlichen Magnetkernen) reduzieren lässt.A significant advantage of the magnetic core according to the invention is the fact that it due to the inventively provided grading the laminated cores at the or the yokes or by the inventive departure from a circular Jochquerschnitt at the leg interface to a step by step reduced magnetic path (compared with conventional magnetic cores with a circular yoke cross-section) and consequently the required core sheet material can be reduced and reduced in weight. The reduction of the core sheet material leads advantageously to a reduction in the Ummagnetisierungsverluste. It is also possible to avoid steps in the area of the yoke edge facing the limb, so that the number of electrical peaks occurring (compared to conventional magnetic cores) can be reduced.

Bezüglich des Blechpaketversatzes wird es als besonders vorteilhaft angesehen, wenn die Blechpaketmitten der äußeren Blechpakete in Richtung des Schenkels derart versetzt sind, dass die Blechpaketmitten äußerer Blechpakete dichter am Schenkel liegen als die Blechpaketmitten mittlerer Blechpakete.With respect to the laminated core offset, it is considered particularly advantageous if the laminated core centers of the outer laminated cores are offset in the direction of the leg such that the laminated core centers of outer laminated cores are closer to the leg than the laminated core centers of middle laminated cores.

Vorzugsweise sind die Blechpakete zumindest eines der Joche derart ausgerichtet, dass - im Querschnitt und quer zur Stapelrichtung der Bleche betrachtet - die Mitten der Blechpakete auf einer krummlinigen Kurve liegen, die bezogen auf die Mitte des mittleren Blechpakets oder der mittleren Blechpakete achsensymmetrisch ist.Preferably, the laminated cores of at least one of the yokes are aligned such that - viewed in cross-section and transverse to the stacking direction of the sheets - the centers of the laminated cores lie on a curvilinear curve which is axially symmetrical with respect to the center of the middle laminated core or the middle laminated cores.

Auch ist es vorteilhaft, wenn bei zumindest einem der Joche die Blechpakete an der Schnittstelle zum Schenkel eine geradlinige Jochkante bilden.It is also advantageous if, in at least one of the yokes, the laminated cores form a straight yoke edge at the interface to the leg.

Vorzugsweise liegen sich die Blechpakete von Joch und Schenkel jeweils paarweise stirnkantenseitig gegenüber.Preferably, the laminated cores of the yoke and legs are in pairs opposite the front edge side.

Auch ist es vorteilhaft, wenn bei den flächig aufeinander liegenden Blechpaketen des Jochs die Stufenhöhe der Stufung jeweils dem Zweifachen der Stufenhöhe der Stufung entspricht, die die stirnkantenseitig gegenüberliegenden Blechpakete des Schenkels aufweisen.It is also advantageous if, in the flat stacked laminations of the yoke, the step height of the step corresponds in each case to twice the step height of the step, which have the end edge side opposite laminations of the leg.

Besonders bevorzugt ist es, wenn die Stufung auf der dem Schenkel abgewandten Seite dem Zweifachen des Versatzes der Blechpakete im Joch entspricht bzw. wenn die Stufung im Bereich des Jochs dem Zweifachen der Stufung im Bereich des Schenkels entspricht.It is particularly preferred if the grading on the side facing away from the leg corresponds to twice the offset of the laminated core in the yoke or if the gradation in the region of the yoke corresponds to twice the grading in the region of the leg.

Die Joch- und Schenkelbleche weisen für jede Stufe vorzugsweise jeweils die gleiche Breite auf. Die Querschnittsflächen von Joch und Schenkel sind vorzugsweise gleich groß.The yoke and leg plates preferably each have the same width for each stage. The cross-sectional areas of yoke and leg are preferably the same size.

Die Blechpakethöhe eines jeden Blechpakets des Jochs ist bevorzugt jeweils genauso groß wie die Blechpakethöhe des stirnkantenseitig gegenüberliegenden Blechpakets des Schenkels.The laminated core height of each laminated core of the yoke is preferably in each case just as large as the laminated core height of the front edge side opposite laminated core of the leg.

Bei zumindest einem der Joche sind die Blechpakete vorzugsweise mittels einer Presseinrichtung zusammengepresst, die mindestens zwei Presseinheiten aufweist, von denen zumindest eine Presseinheit, bevorzugt die oder eine schenkelnahe Presseinheit, alle Blechpakete des Jochs zusammenpresst und von denen zumindest eine Presseinheit, bevorzugt die oder eine schenkelferne Presseinheit, nur eine Teilmenge der Blechpakete des Jochs zusammenpresst. Mit anderen Worten ist es vorteilhaft, die Pressung des Joches in Richtung Schenkel in mehrere Pressbereiche zu unterteilen, so dass diese zumindest teilweise nicht die gesamte Schichtdicke des Kernjoches umfasst.In at least one of the yokes, the laminated cores are preferably pressed together by means of a pressing device having at least two pressing units, of which at least a press unit, preferably the or a leg-near press unit, compresses all laminated cores of the yoke and of which at least one press unit, preferably the or a leg-distant press unit, compresses only a subset of the laminated core of the yoke. In other words, it is advantageous to subdivide the pressing of the yoke in the direction of the leg into a plurality of pressing areas, so that these at least partially do not cover the entire layer thickness of the core yoke.

Vorzugsweise weist zumindest eine der Presseinheiten des Joches Spannbänder zur Übertragung der Presskraft auf.Preferably, at least one of the press units of the yoke on clamping bands for transmitting the pressing force.

Alternativ oder zusätzlich kann vorgesehen sein, dass zumindest eine der Presseinheiten Pressbolzen aufweist, die zwei außenseitig am Joch anliegende und einander gegenüberliegende Presselemente, zum Beispiel in Form von Pressbalken, auf das Joch drücken.Alternatively or additionally, it can be provided that at least one of the press units has press studs which press on the yoke two outside pressing elements which are located on the outside of the yoke and face one another, for example in the form of press beams.

Auch ist es vorteilhaft, wenn die jeweils einen Teilbereich der Jochhöhe pressenden Presseinheiten mit jeweils eigenen die Presskraft längs in Jochrichtung verteilenden Pressbalken versehen sind.It is also advantageous if each of a portion of the yoke height pressing press units are provided with their own the press force longitudinally distributed in the yoke direction pressing bars.

Vorzugsweise sind nur die dem Schenkel gegenüberliegenden Pressbalken mit der Wicklungsauflage oder der Wicklungsverspannungseinrichtung direkt verbunden. Die Pressbalken der schenkelfernen Jochpresseinheit sind vorzugsweise räumlich und kraftschlüssig von der Wicklungsauflage und Wicklungsverspannungseinrichtung getrennt.Preferably, only the pressing beam opposite the leg are directly connected to the winding support or the winding tensioning device. The press beams of the leg-distant yoke press unit are preferably spatially and non-positively separated from the winding support and winding tensioning device.

Auch ist es vorteilhaft, wenn eine Presseinheit zumindest eines Joches mit längs des Joches angeordneten Pressbalken versehen ist und wenn diese Pressbalken jeweils aus einem metallischen Material gefertigt sind und zumindest teilweise auf der der Wicklung gegenüberliegenden Seite mit einer eine elektrische Abschirmung bildenden runden Abschlussfläche versehen sind. Der Abstand der runden Abschlussfläche zur Wicklungskante der Wicklung ist vorzugsweise gleich dem Abstand der Jochkante zur Wicklung oder kleiner als dieser.It is also advantageous if a pressing unit of at least one yoke is provided with longitudinally disposed of the yoke pressing beam and if these pressing bars are each made of a metallic material and are at least partially provided on the opposite side of the winding with an electrical shield forming round end surface. The distance between the round end surface and the winding edge the winding is preferably equal to or smaller than the distance of the yoke edge to the winding.

Weiterhin wird es als vorteilhaft angesehen, wenn für die axiale Verspannung einer auf dem Schenkel befindlichen Wicklung zumindest ein Abstützelement vorgesehen ist, welches in Richtung Joch zumindest teilweise angeschrägt ist, und der Versatz der Mitten der äußeren Blechpakete des Joches derart gestaltet ist, dass die Stufung des Joches der Kontur der Anschrägung des Abstützelements folgt.Furthermore, it is considered advantageous if at least one support element is provided for the axial strain of a winding located on the leg, which is at least partially bevelled in the yoke, and the offset of the centers of the outer laminated core of the yoke is designed such that the gradation the yoke follows the contour of the bevel of the support element.

Die Blechpakete des unter der Wicklung befindlichen Joches sind gegenüber der Mitte des mittleren Blechpaketes des Joches bevorzugt derart verschoben, dass die Jochkante auf der zum Schenkel zeigenden Seite eine Linie bildet und die Wicklungsauflage zur Lagerung der Wicklung sich zumindest teilweise auf dieser Jochkante direkt abstützt.The laminated cores of the yoke located under the winding are preferably shifted relative to the middle of the middle laminated core of the yoke, that the yoke edge forms a line on the side facing the leg and the winding support for supporting the winding is at least partially supported directly on this yoke edge.

Die Erfindung wird nachfolgend anhand von Ausführungsbeispielen näher erläutert. Dabei zeigen beispielhaft:

Figur 1
einen Abschnitt eines erfindungsgemäßen Magnetkerns im Querschnitt,
Figur 2
einen Schenkel des Magnetkerns gemäß Figur 1 im Querschnitt,
Figur 3
ein Ausführungsbeispiel für ein oberes Joch für den Magnetkern gemäß Figur 1 im Querschnitt,
Figur 4
ein Ausführungsbeispiel für ein unteres Joch für den Magnetkern gemäß Figur 1 im Querschnitt,
Figur 5
ein Ausführungsbeispiel für einen dreischenkeligen Magnetkern,
Figur 6
ein Joch des Magnetkerns gemäß Figur 5 im Querschnitt,
Figur 7
das Joch gemäß Figur 6 in einer dreidimensionalen Darstellung schräg von der Seite,
Figur 8
eine modifizierte Jochausgestaltung mit zusätzlicher elektrischer Abschirmung für den Magnetkern gemäß Figur 5,
Figur 9
ein weiteres Ausführungsbeispiel für einen dreischenkeligen Magnetkern,
Figur 10
ein Joch des Magnetkerns gemäß Figur 9 im Querschnitt,
Figur 11
das Joch gemäß Figur 10 in einer dreidimensionalen Darstellung schräg von der Seite und
Figur 12
das obere Joch eines Ausführungsbeispiels mit Blechpaketen, welche gegenüber den Blechpaketen des Schenkels einen veränderten Querschnitt aufweisen.
The invention will be explained in more detail with reference to embodiments. Here are an example:
FIG. 1
a section of a magnetic core according to the invention in cross-section,
FIG. 2
a leg of the magnetic core according to FIG. 1 in cross section,
FIG. 3
an embodiment of an upper yoke for the magnetic core according to FIG. 1 in cross section,
FIG. 4
an embodiment of a lower yoke for the magnetic core according to FIG. 1 in cross section,
FIG. 5
an exemplary embodiment of a three-arm magnetic core,
FIG. 6
a yoke of the magnetic core according to FIG. 5 in cross section,
FIG. 7
according to the yoke FIG. 6 in a three-dimensional representation obliquely from the side,
FIG. 8
a modified yoke design with additional electrical shielding for the magnetic core according to FIG. 5 .
FIG. 9
Another embodiment of a three-arm magnetic core,
FIG. 10
a yoke of the magnetic core according to FIG. 9 in cross section,
FIG. 11
according to the yoke FIG. 10 in a three-dimensional representation obliquely from the side and
FIG. 12
the upper yoke of an embodiment with laminated cores, which have a changed cross section with respect to the laminated cores of the leg.

In den Figuren werden der Übersicht halber für identische oder vergleichbare Komponenten stets dieselben Bezugszeichen verwendet.For the sake of clarity, the same reference numbers are always used in the figures for identical or comparable components.

Die Figur 1 zeigt einen Abschnitt eines Magnetkerns 1 für eine elektrische Induktionseinrichtung. Der Magnetkern 1 umfasst ein oberes Joch 3, ein unteres Joch 4 sowie einen von einer Wicklung 10 der Induktionseinrichtung verdeckten Schenkel 2, der zwischen dem oberen Joch 3 und dem unteren Joch 4 angeordnet ist. Die Wicklung 10 der Induktionseinrichtung ist auf den Schenkel 2 aufgesetzt.The FIG. 1 shows a portion of a magnetic core 1 for an electric induction device. The magnetic core 1 comprises an upper yoke 3, a lower yoke 4 and a leg 2 concealed by a winding 10 of the induction device, which is arranged between the upper yoke 3 and the lower yoke 4. The winding 10 of the induction device is placed on the leg 2.

Das obere Joch 3 wird durch Blechpakete 31 gebildet, die mittels einer Presseinrichtung 9 aufeinander gepresst werden. Die Presseinrichtung 9 umfasst eine untere Presseinheit 91, die benachbart zum Schenkel 2 angeordnet ist, sowie eine obere Presseinheit 92, die vom Schenkel 2 durch die Presseinheit 91 räumlich getrennt ist.The upper yoke 3 is formed by laminated cores 31, which are pressed against each other by means of a pressing device 9. The pressing device 9 comprises a lower pressing unit 91, which is arranged adjacent to the leg 2, as well as an upper Press unit 92, which is spatially separated from the leg 2 by the pressing unit 91.

Es lässt sich in der Figur 1 erkennen, dass die untere Presseinheit 91 alle Blechpakete 31 des oberen Jochs 3 zusammenpresst, wohingegen die obere Presseinheit 92 lediglich einige der Blechpakete 31 des oberen Jochs 3, jedoch nicht alle Blechpakete 31 zusammenpresst.It settles in the FIG. 1 recognize that the lower pressing unit 91 compresses all the laminated cores 31 of the upper yoke 3, whereas the upper pressing unit 92 compresses only some of the laminated core 31 of the upper yoke 3, but not all of the laminated cores 31.

Die beiden Presseinheiten 91 und 92 umfassen bei dem Ausführungsbeispiel gemäß Figur 1 jeweils zwei Pressbalken 93, die mittels in der Figur 1 nicht dargestellter Pressbolzen zusammengedrückt werden.The two press units 91 and 92 comprise in the embodiment according to FIG. 1 two press beams 93, which means by in the FIG. 1 Unillustrated billets are compressed.

Die Blechpakete 31 des oberen Jochs 3 sind bei dem Magnetkern 1 gemäß Figur 1 derart ausgerichtet, dass die Blechpaketmitten außenliegender Blechpakete gegenüber der Blechpaketmitte mittlerer Blechpakete in Richtung des Schenkels 2 unter Bildung einer Jochquerschnittsfläche versetzt sind, bei der der geometrische Flächenschwerpunkt FP gegenüber der Blechpaketmitte M der mittleren Blechpakete in Richtung des Schenkels 2 verschoben ist.The laminated cores 31 of the upper yoke 3 are in the magnetic core 1 according to FIG. 1 aligned in such a way that the laminated core centers on the outside of the laminated core are offset relative to the middle of the laminated core in the direction of the arm 2 in the direction of the arm 2, in which the geometrical center of gravity FP is displaced in the direction of the arm 2 relative to the center of the armature core M of the middle laminations.

Zur mechanischen Verspannung der Wicklung 10 im Bereich des Schenkels 2 dient an der Schnittstelle zum oberen Joch 3 bei dem Magnetkern 1 gemäß Figur 1 eine Wicklungsverspannungseinrichtung 11, die zwei Abstützelemente 110 und 111 umfasst. Die beiden Abstützelemente 110 und 111 weisen in Richtung der Schenkelmitte des Schenkels 2 bzw. der Jochmitte des oberen Jochs 3 jeweils eine schräg verlaufende Kante 112 auf, an deren Verlauf die untere Jochkante 32 des oberen Jochs 3 angepasst ist. Um die Anpassung der Jochkante 32 an die Form der Abstützelemente 110 und 111 zu ermöglichen, ist der Versatz der Blechpakete 31 bzw. die Stufung der Blechpakete 31 wie in Figur 1 gezeigt im Jochrandbereich entsprechend gewählt.For mechanical tension of the winding 10 in the region of the leg 2 serves at the interface to the upper yoke 3 in the magnetic core 1 according to FIG. 1 a winding tensioning device 11, which comprises two supporting elements 110 and 111. The two support elements 110 and 111 have in the direction of the leg center of the leg 2 and the middle of the yoke of the upper yoke 3 each have a sloping edge 112, at the course of the lower yoke edge 32 of the upper yoke 3 is adjusted. In order to allow the adjustment of the yoke edge 32 to the shape of the support elements 110 and 111, the offset of the laminated cores 31 and the gradation of the laminated cores 31 as in FIG. 1 shown in Jochrandbereich selected accordingly.

Die Figur 1 zeigt darüber hinaus die Ausgestaltung des unteren Jochs 4 näher im Detail. Es lässt sich erkennen, dass das untere Joch 4 durch Blechpakete 41 gebildet ist, die mittels einer Presseinrichtung 9 aufeinandergepresst werden. Die Presseinrichtung 9 umfasst eine obere Presseinheit 91, die dem Schenkel 2 gegenüber benachbart angeordnet ist, sowie eine vom Schenkel 2 entfernt angeordnete Presseinheit 92.The FIG. 1 moreover, shows the configuration of the lower yoke 4 in more detail. It can be seen that that lower yoke 4 is formed by laminated cores 41, which are pressed together by means of a pressing device 9. The pressing device 9 comprises an upper pressing unit 91, which is arranged adjacent to the leg 2, and a pressing unit 92 arranged at a distance from the leg 2.

Die beiden Presseinheiten 91 und 92 weisen jeweils gegenüberliegende Pressbalken 93 auf, die mittels nicht dargestellter Pressbolzen aufeinandergedrückt werden.The two press units 91 and 92 each have opposing press bars 93, which are pressed together by means not shown pressing bolts.

Die Blechpakete 41 sind bei dem unteren Joch 4 derart ausgerichtet, dass die Blechpaketmitten außenliegender Blechpakete gegenüber der Blechpaketmitte mittlerer Blechpakete in Richtung des Schenkels 2 unter Bildung einer Jochquerschnittsfläche versetzt sind, bei der der geometrische Flächenschwerpunkt FP gegenüber der Blechmitte M der mittleren Blechpakete in Richtung des Schenkels 2 verschoben ist. Der Versatz der Blechpakete 41 ist darüber hinaus derart gewählt, dass an der Schnittstelle zum Schenkel 2 eine geradlinige Jochkante 42 gebildet wird, auf der eine Wicklungsauflage 12, die die Wicklung 10 trägt, aufliegt.The laminated cores 41 are aligned at the lower yoke 4 such that the laminated core centers of the outer laminated cores are offset from the middle of the laminated core middle laminations in the direction of the leg 2 to form a Jochquerschnittsfläche, in which the geometric centroid FP relative to the center M of the middle laminated cores in the direction of Schenkels 2 is moved. The offset of the laminated cores 41 is also chosen such that at the interface to the leg 2 a straight yoke edge 42 is formed on which a winding support 12, which carries the winding 10, rests.

Mit anderen Worten ist die dem Schenkel 2 zugewandte Jochkante des unteren Jochs 4 vorzugsweise geradlinig, wohingegen die untere Jochkante 32 des oberen Jochs 3 mit Blick auf eine Anpassung der Jochkante an die Abstützelemente 110 und 111 vorzugsweise ungeradlinig ist.In other words, the yoke edge of the lower yoke 4 facing the limb 2 is preferably rectilinear, whereas the lower yoke edge 32 of the upper yoke 3 is preferably non-linear with a view to adapting the yoke edge to the support elements 110 and 111.

Zwischen der Wicklungsauflage 12 und der Wicklung sowie zwischen den Abstützelementen 110 und 111 ist vorzugsweise jeweils eine Isolieranordnung 101 vorgesehen.Between the winding support 12 and the winding and between the support elements 110 and 111, an insulating arrangement 101 is preferably provided in each case.

Die Figur 2 zeigt den Querschnitt des Schenkels 2 des Magnetkerns 1 gemäß Figur 1 im Querschnitt. Es lässt sich erkennen, dass der Schenkel 2 aus einer Vielzahl an Blechpaketen 21 gebildet ist. Im Querschnitt ist der Schenkel 2 kreisförmig mit einem gestuften äußeren Rand. Die Mitten der Blechpakete des Schenkels 2 liegen auf einer geraden Linie 22.The FIG. 2 shows the cross section of the leg 2 of the magnetic core 1 according to FIG. 1 in cross section. It can be seen that the leg 2 is formed from a plurality of laminated cores 21. In cross section, the leg 2 is circular with a stepped outer edge. The centers of the laminated cores of the leg 2 lie on a straight line 22.

Die Figur 3 zeigt im Querschnitt ein weiteres Ausführungsbeispiel für ein oberes Joch 3, das bei dem Magnetkern 1 gemäß Figur 1 eingesetzt werden kann. Es lässt sich erkennen, dass die Mitten der Blechpakete 31 auf einer krummlinigen Kurve 36 liegen, die vorzugsweise - bezogen auf die Jochmitte des oberen Jochs 3 - achsensymmetrisch ist. Darüber hinaus lässt die Figur 3 erkennen, dass der Flächenschwerpunkt FP des oberen Jochs 3 gegenüber der Blechpaketmitte M der mittleren Blechpakete in Richtung der unteren Jochkante 32 verschoben ist.The FIG. 3 shows in cross section a further embodiment of an upper yoke 3, which in the magnetic core 1 according to FIG. 1 can be used. It can be seen that the centers of the laminated cores 31 lie on a curvilinear curve 36, which is preferably axisymmetric with respect to the middle of the yoke of the upper yoke 3. In addition, the leaves FIG. 3 recognize that the centroid FP of the upper yoke 3 is shifted in the direction of the lower yoke edge 32 with respect to the laminated core center M of the middle laminations.

Die Figur 4 zeigt nochmals das untere Joch des Magnetkerns 1 gemäß Figur 1 im Querschnitt. Es lässt sich erkennen, dass die Blechpaketmitten der Blechpakete 41 des unteren Jochs 4 auf einer krummlinigen Kurve 46 liegen, die - bezogen auf die Mitte des mittleren Blechpakets des unteren Jochs 4 - vorzugsweise achsensymmetrisch ist. Darüber hinaus zeigt die Figur 4 den Versatz des Flächenschwerpunkts FP gegenüber der Blechpaketmitte M des mittleren Blechpakets des unteren Jochs 4; es lässt sich erkennen, dass der Flächenschwerpunkt FP in Richtung auf die an die Wicklungsauflage 12 (vgl. Figur 1) angrenzende Jochkante 42 verschoben ist.The FIG. 4 again shows the lower yoke of the magnetic core 1 according to FIG. 1 in cross section. It can be seen that the laminated core centers of the laminated cores 41 of the lower yoke 4 lie on a curvilinear curve 46, which is preferably axially symmetrical with respect to the center of the middle laminated core of the lower yoke 4. In addition, Figure 4 shows the offset of the centroid FP with respect to the laminated core center M of the middle laminated core of the lower yoke 4; It can be seen that the centroid FP in the direction of the to the winding support 12 (see. FIG. 1 ) adjacent Jochkante 42 is shifted.

Die Figur 5 zeigt ein Ausführungsbeispiel für einen dreischenkeligen Magnetkern 1 für eine elektrische Induktionseinrichtung, die neben dem Magnetkern 1 drei Wicklungen 10 aufweist. Jede der Wicklungen 10 ist jeweils auf einem Schenkel 2 des dreischenkeligen Magnetkerns 1 aufgesetzt.The FIG. 5 shows an embodiment of a three-legged magnetic core 1 for an electrical induction device, which has three windings 10 in addition to the magnetic core 1. Each of the windings 10 is in each case placed on a leg 2 of the three-arm magnetic core 1.

Die Figur 5 zeigt darüber hinaus Pressbolzen 94, die zum Verpressen der Blechpakete des oberen Jochs 3 bzw. des unteren Jochs 4 dienen. Die Pressbolzen 94 bilden vorzugsweise Bestandteile von Presseinheiten, beispielsweise solchen wie den Presseinheiten 91 und 92 gemäß Figur 1, von denen zumindest eine vorzugsweise nicht die gesamte Schichtdicke des jeweiligen Jochs erfasst und von denen zumindest eine andere vorzugsweise die gesamte Schichtdicke des jeweiligen Jochs umfasst.The FIG. 5 moreover shows pressing bolt 94, which serve for pressing the laminated cores of the upper yoke 3 and the lower yoke 4. The press studs 94 preferably form components of press units, such as those in the press units 91 and 92, respectively FIG. 1 of which at least one preferably does not cover the entire layer thickness of the respective yoke and of which at least one other preferably comprises the entire layer thickness of the respective yoke.

Bei dem oberen Joch 3 und dem unteren Joch 4 kann eine Segmentierung des jeweiligen Jochs in einem schenkelnahen Abschnitt 3a bzw. 4a und einem schenkelfernen Abschnitt 3b bzw. 4b vorgesehen sein, wie dies durch Linien L in der Figur 5 angedeutet ist.In the upper yoke 3 and the lower yoke 4, a segmentation of the respective yoke in a leg-proximal portion 3a and 4a and a leg distant portion 3b and 4b may be provided, as indicated by lines L in the FIG. 5 is indicated.

Die Figur 6 zeigt die Verpressung der Blechpakete beim oberen Joch 3 des Magnetkerns 1 gemäß Figur 5 beispielhaft näher im Detail. Man erkennt eine Presseinrichtung 9, die eine Presseinheit 91 sowie eine Presseinheit 92 umfasst. Die Presseinheit 91 weist zwei gegenüberliegende Pressbalken 93, Pressbolzen 94 sowie zwei Pressbeilageelemente 95 auf. Die Funktion der Pressbeilageelemente 95 besteht darin, einen gleichmäßigen Anpressdruck über Blechpaketstufen hinweg zu gewährleisten. Die Presseinheit 91 dient zum Zusammenpressen aller Blechpakete des Jochs.The FIG. 6 shows the compression of the laminated cores at the upper yoke 3 of the magnetic core 1 according to FIG. 5 exemplary closer in detail. One recognizes a pressing device 9, which comprises a pressing unit 91 and a pressing unit 92. The pressing unit 91 has two opposing pressing bars 93, pressing pins 94 and two pressing inserts 95. The function of the Pressbeilageelemente 95 is to ensure a uniform contact pressure on Blechpaketstufen away. The pressing unit 91 serves to compress all laminated cores of the yoke.

Die Presseinheit 92 weist ebenfalls zwei Pressbalken 93, Pressbolzen 94 sowie zwei Pressbeilageelemente 95 auf. Im Unterschied zu der Presseinheit 91 presst die Presseinheit 92 lediglich eine Teilmenge der Blechpakete des Jochs zusammen.The pressing unit 92 also has two pressing bars 93, pressing pins 94 and two pressing inserts 95. In contrast to the pressing unit 91, the pressing unit 92 presses together only a subset of the laminated core of the yoke.

Die Figur 7 zeigt die beiden Presseinrichtungen 91 und 92 gemäß Figur 6 näher im Detail in einer dreidimensionalen Darstellung schräg von der Seite. Man erkennt die Pressbalken 93, die Pressbolzen 94 sowie die Pressbeilageelemente 95, deren Funktion bereits im Zusammenhang mit der Figur 6 erläutert worden ist.The FIG. 7 shows the two pressing devices 91 and 92 according to FIG. 6 closer in detail in a three-dimensional representation obliquely from the side. One recognizes the pressing beam 93, the pressing bolt 94 and the press shims 95 whose function already in connection with the FIG. 6 has been explained.

Die Figur 8 zeigt eine bevorzugte, modifizierte Ausgestaltung für die Presseinheit 91, die zu der Wicklung 10 unmittelbar benachbart ist. Es lässt sich erkennen, dass die Pressbalken 93 der Presseinheit 91 im Bereich ihrer der Wicklung 10 gegenüberliegenden unteren Balkenkanten jeweils mit einer elektrischen Abschirmung 96 ausgestattet sind. Die elektrische Abschirmung weist vorzugsweise im Querschnitt eine runde Abschlussfläche auf, deren Abstand zur Wicklungskante der Wicklung 10 gleich oder kleiner ist als der Abstand der unteren Jochkante 32 des Jochs 3 von der Wicklung 10. Die Pressbalken 93 und die elektrische Abschirmung 96 bestehen vorzugsweise aus metallischem Material.The FIG. 8 shows a preferred, modified embodiment for the pressing unit 91, which is immediately adjacent to the winding 10. It can be seen that the pressing bars 93 of the pressing unit 91 are each provided with an electrical shield 96 in the region of their lower beam edges opposite the winding 10. The electrical shield preferably has a round end surface in cross section, whose distance from the winding edge of the Winding 10 is equal to or smaller than the distance of the lower Jochkante 32 of the yoke 3 of the winding 10. The pressing beam 93 and the electrical shield 96 are preferably made of metallic material.

Bei dem Ausführungsbeispiel gemäß Figur 8 reduziert sich durch den vollständigen Entfall einer Stufung im Bereich der der Wicklung 10 zugewandten unteren Jochkante 32 bereits die Anzahl der auftretenden elektrischen Spitzen (verglichen mit herkömmlichen Magnetkernen mit kreisförmigen Jochen und ungeradliniger Jochkante). Darüber hinaus wird die der Wicklung 10 zugewandte Jochkante 32 durch die in die Presseinheit 91 integrierte elektrische Abschirmung 96 abgeschirmt. Wie erwähnt, wird die Presseinheit 91 vorzugsweise derart nach unten verlängert, dass sich ein Überstand zur Jochkante 32 bildet, und es erfolgt vorzugsweise eine Verrundung der Presseinheit 91 im Bereich dieser Überdeckung.In the embodiment according to FIG. 8 reduced by the complete elimination of a gradation in the region of the winding 10 facing the lower yoke edge 32 already the number of electrical spikes occurring (compared with conventional magnetic cores with circular yokes and odd-line yoke edge). In addition, the yoke edge 32 facing the winding 10 is shielded by the electrical shield 96 integrated in the press unit 91. As mentioned, the pressing unit 91 is preferably extended downwards so that a projection to the yoke edge 32 is formed, and it is preferably a rounding of the pressing unit 91 in the region of this overlap.

Die Figur 9 zeigt ein Ausführungsbeispiel für einen dreischenkeligen Magnetkern 1 für eine Induktionseinrichtung, die mit drei Wicklungen 10 ausgestattet ist. Es lässt sich erkennen, dass die drei Schenkel 2 des Magnetkerns 1 mittels eines oberen Jochs 3 und eines unteren Jochs 4 miteinander verbunden sind. Zum Verspannen der Blechpakete des oberen Jochs 3 und des unteren Jochs 4 sind Spannbänder 200, zum Beispiel in Form von Bandagen, vorgesehen, die durch Löcher oder Schlitze im jeweiligen Joch hindurchgeführt sein können. Alternativ kann eine Segmentierung des jeweiligen Jochs in einem schenkelnahen Abschnitt und einem schenkelfernen Abschnitt vorgesehen sein, so dass jedes der Spannbänder 200 entweder das schenkelferne oder das schenkelnahe Segment verspannt. Bezüglich der Segmentierung in ein schenkelfernes oder schenkelnahes Segment sei auf die Erläuterungen im Zusammenhang mit der Figur 5 verwiesen, die hier analog gelten.The FIG. 9 shows an embodiment of a three-legged magnetic core 1 for an induction device, which is equipped with three windings 10. It can be seen that the three legs 2 of the magnetic core 1 are interconnected by means of an upper yoke 3 and a lower yoke 4. For clamping the laminated cores of the upper yoke 3 and the lower yoke 4 clamping bands 200, for example in the form of bandages, provided which can be passed through holes or slots in the respective yoke. Alternatively, segmentation of the respective yoke may be provided in a leg-proximal portion and a leg-distal portion such that each of the tension bands 200 braces either the leg-distal or thigh-proximal segment. With regard to the segmentation into a leg - distant or thigh - related segment, reference should be made to the explanations in connection with FIG. 5 referenced, which apply analogously here.

Die Figur 10 zeigt in einem Querschnitt ein Ausführungsbeispiel für das Verspannen des oberen Jochs 3 bzw. des unteren Jochs 4 gemäß Figur 9 näher im Detail. Man erkennt eine schenkelnahe Presseinheit 91 sowie eine schenkelferne Presseinheit 92, von denen die schenkelnahe Presseinheit 91 alle Blechpakete des Jochs und die schenkelferne Presseinheit 92 eine Teilmenge der Blechpakete des Jochs zusammenpresst. Die beiden Presseinheiten 91 und 92 weisen jeweils ein Spannband 200 auf, das zum Verspannen der Blechpakete des jeweiligen Jochsegments dient. Um eine gleichmäßige Anpresskraft zu erreichen, weisen die beiden Presseinheiten 91 und 92 vorzugsweise auch Pressbeilageelemente 95 auf, wie sie bereits im Zusammenhang mit den Figuren 6 und 7 erläutert worden sind.The FIG. 10 shows in a cross section an embodiment for the bracing of the upper yoke 3 and the lower yoke 4, respectively FIG. 9 closer in detail. One recognizes one limb-close pressing unit 91 and a leg-distant pressing unit 92, of which the leg-near pressing unit 91 compresses all laminated cores of the yoke and the leg-distant pressing unit 92 a subset of the laminated core of the yoke. The two press units 91 and 92 each have a clamping band 200, which serves to clamp the laminated cores of the respective yoke segment. In order to achieve a uniform contact pressure, the two press units 91 and 92 preferably also press-insert elements 95, as already in connection with the FIGS. 6 and 7 have been explained.

Um das Anbringen der Spannbänder 200 wie in Figur 10 gezeigt zu ermöglichen, können die Blechpakete des Jochs in ein oder mehrere schenkelferne und in ein oder mehrere schenkelnahe Segmente segmentiert sein; beispielsweise kann in einem solchen Falle die schenkelnahe Presseinheit 91 das schenkelnahe Segment des Jochs und die schenkelferne Presseinheit 92 das schenkelferne Segment des Jochs zusammenpressen. Alternativ kann das Joch mit Löchern versehen sein, durch die die Spannbänder 200 hindurch gezogen sind.To attach the straps 200 as shown in FIG. 10 shown, the laminations of the yoke may be segmented into one or more legs remote and in one or more leg-proximal segments; For example, in such a case, the leg near press unit 91 may compress the leg near segment of the yoke and the leg distal press unit 92, the leg distant segment of the yoke. Alternatively, the yoke may be provided with holes through which the tension bands 200 are pulled.

Vorteilhafterweise sind die Spannbänder (200) der schenkelnahen Presseinheit (91) und die Spannbänder der schenkelfernen Presseinheit (92) in Richtung der Jochachse versetzt angeordnet. Somit wird es möglich dass die Spannbänder der schenkelnahen Presseinheit und die Spannbänder der schenkelfernen Presseinheit jeweils den gleichen Spalt zwischen den Jochsegmenten nutzen können.Advantageously, the tension bands (200) of the leg-near press unit (91) and the tension bands of the leg-distant press unit (92) are arranged offset in the direction of the yoke axis. Thus, it is possible that the clamping bands of the leg-near pressing unit and the clamping bands of the leg-distant pressing unit can each use the same gap between the yoke segments.

Die Anzahl der Spannbänder (200) der schenkelfernen Presseinheit (92) kann gegenüber der Anzahl der Spannbänder der schenkelnahen Presseinheit (91) erhöht sein, um eine günstige Verteilung der Presskräfte auf das Joch zu erreichen.The number of tension bands (200) of the leg-distant press unit (92) can be increased in relation to the number of tension bands of the leg-near press unit (91) in order to achieve a favorable distribution of the pressing forces on the yoke.

Die Figur 11 zeigt die beiden Presseinrichtungen 91 und 92 mit den Spannbändern 200 gemäß Figur 10 beim oberen Joch 3 in einer dreidimensionalen Darstellung näher im Detail.The FIG. 11 shows the two pressing devices 91 and 92 with the tension bands 200 according to FIG. 10 in the upper yoke 3 in a three-dimensional representation closer in detail.

Die Figur 12 zeigt ein Ausführungsbeispiel, bei dem die Blechpakete 31 des Joches 3 zumindest teilweise nicht die gleiche Blechbreite aufweisen wie die zugeordneten Blechpakete des Schenkels 2. Im Ausführungsbeispiel erfolgt die Auslegung der Blechpakete des Schenkels wie in den bereits vorgenannten Beispielen derart, dass ein der Kreisform angenäherter Schenkel 2 gebildet wird. Dieser ist von der Wicklung 10 umschlossen.The FIG. 12 shows an embodiment in which the laminated cores 31 of the yoke 3 at least partially not the same sheet metal width as the associated laminated core of the leg 2. In the embodiment, the design of the laminated cores of the leg takes place as in the aforementioned examples such that a circular shape approximated leg 2 is formed. This is enclosed by the winding 10.

Das Joch 3 weist im Ausführungsbeispiel eine gegenüber dem Schenkel verminderte Anzahl von Kernstufen auf. Mehrere Blechpakete 31 des Joches weisen eine gleiche Blechbreite auf. Die Anpassung der Querschnitte von Schenkel und Joch erfolgt im Ausführungsbeispiel Blechpaket übergreifend. Durch diese spezielle Ausführung ist eine Verminderung der Kernhöhe, sowie eine Vereinfachung der Presseinheiten möglich. Auch hier erfolgt der oben beschriebene Versatz der jeweiligen Mitten der Blechpakete 31 zueinander. Die Blechpakete bilden auch in diesem Ausführungsbeispiel an der Schnittkante zum Schenkel eine geradlinige Jochkante 32.In the exemplary embodiment, the yoke 3 has a number of core stages reduced in relation to the leg. Several laminated cores 31 of the yoke have a same sheet width. The adaptation of the cross sections of leg and yoke takes place in the exemplary embodiment laminated core. By this special design, a reduction of the core height, as well as a simplification of the press units is possible. Again, the above-described offset of the respective centers of the laminated cores 31 to each other. The laminated cores form in this embodiment at the cutting edge to the leg a straight yoke edge 32nd

Die Pressung des Joches ist in mehrere Pressbereiche unterteilt, die durch getrennte Presseinheiten (91, 92) verspannt werden. Die schenkelnahen Presseinrichtungen 91 des Joches 3 sind durch parallel zur Schenkelachse verlaufende Zugelemente 98 zur Wicklungsverspannung miteinander verbunden. Diese Zugelemente 98 können wie bekannt durch außerhalb der Wicklung liegende Zugstangen, durch innerhalb der Wicklung auf dem Schenkel aufliegende Zugstangen oder durch innerhalb des Kernes oder der Wicklung verlaufende Zugelemente aus Kunststoff gebildet werden.The pressing of the yoke is subdivided into several pressing regions, which are clamped by separate pressing units (91, 92). The leg-facing pressing devices 91 of the yoke 3 are connected to each other by parallel to the leg axis extending tension members 98 for winding tension. As is known, these tension elements 98 can be formed by tie rods located outside the winding, by tie rods lying on the leg within the winding or by plastic pull elements running within the core or the winding.

In einer vorteilhaften Ausgestaltung sind die Befestigungselemente 99 zum Anheben des Aktivteiles jeweils nur mit der Presseinheit 91 eines Abschnittes des Joches verbunden.In an advantageous embodiment, the fastening elements 99 for lifting the active part are each connected only to the pressing unit 91 of a portion of the yoke.

Bevorzugt weisen die schenkelfernen Presseinheiten 92 keine Verbindung zu den Wicklungsverspanneinrichtungen, den Wicklungsauflagen und den Zugelementen 98 zur Wicklungsverspannung sowie den Befestigungselementen 99 zum Anheben des Aktivteiles auf. Die Kraftwirkungen dieser Funktionen müssen demzufolge bei der Dimensionierung der schenkelfernen Presseinrichtungen 92 nicht berücksichtigt werden.The leg-distant press units 92 preferably have no connection to the winding tensioning devices, the winding supports and the tensile elements 98 for winding tensioning and the fastening elements 99 for lifting the active part. The force effects of these functions must therefore not be taken into account in the dimensioning of the leg-distant pressing devices 92.

Obwohl die Erfindung im Detail durch bevorzugte Ausführungsbeispiele näher illustriert und beschrieben wurde, so ist die Erfindung nicht durch die offenbarten Beispiele eingeschränkt und andere Variationen können vom Fachmann hieraus abgeleitet werden, ohne den Schutzumfang der Erfindung zu verlassen.While the invention has been further illustrated and described in detail by way of preferred embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

Claims (15)

Magnetkern (1) für eine elektrische Induktionseinrichtung, der zumindest zwei Schenkel (2) und mindestens zwei die Schenkel (2) an ihren Enden verbindende Joche (3, 4) aufweist, wobei die Joche (3, 4) und die Schenkel (2) jeweils aus Blechpaketen (31, 41) zusammengesetzt sind und der Querschnitt der Schenkel (2) und der der Joche (3, 4) durch die Blechpaketbreite der aufeinander liegenden Blechpakete (31, 41) und die sich daraus ergebende Stufung bestimmt wird,
dadurch gekennzeichnet, dass - zumindest einer der Schenkel (2) des Magnetkernes eine Wicklung (10) trägt und dieser die Wicklung (10) tragende Schenkel (2) im Querschnitt kreisförmig mit einem gestuften äußeren Rand ist und die Mitten der Blechpakete (31, 41) dieses Schenkels (2) auf einer geraden Linie liegen und - bei zumindest einem der an diesem Schenkel (2) angrenzenden Joche (3, 4) die Blechpakete (31, 41) derart ausgerichtet sind, dass die Blechpaketmitten außenliegender Blechpakete (31, 41) gegenüber der Blechpaketmitte mittlerer Blechpakete (31, 41) in Richtung dieses Schenkels (2) unter Bildung einer Jochquerschnittsfläche versetzt sind, bei der der geometrische Flächenschwerpunkt (FP) gegenüber der Blechpaketmitte der mittleren Blechpakete (31, 41) in Richtung dieses Schenkels (2) verschoben ist. Magnetic core (1) for an electrical induction device, comprising at least two legs (2) and at least two yokes (3, 4) connecting the legs (2) at their ends, the yokes (3, 4) and the legs (2) are each composed of laminated cores (31, 41) and the cross section of the legs (2) and of the yokes (3, 4) by the laminated core width of the stacked laminations (31, 41) and the resulting gradation is determined
characterized in that - At least one of the legs (2) of the magnetic core carries a winding (10) and this winding (10) supporting leg (2) is circular in cross-section with a stepped outer edge and the centers of the laminated cores (31, 41) of this leg ( 2) lie on a straight line and in at least one of the legs (3, 4) adjoining this leg (2), the laminated cores (31, 41) are aligned in such a way that the laminated core centers of outboard laminated cores (31, 41) lie opposite the center of the laminated core of central laminated cores (31, 41) Direction of this leg (2) are offset to form a Jochquerschnittsfläche in which the geometric centroid (FP) relative to the laminated core of the middle laminated core (31, 41) in the direction of this leg (2) is displaced. Magnetkern (1) nach Anspruch 1,
dadurch gekennzeichnet, dass
die Blechpaketmitten der äußeren Blechpakete (31, 41) in Richtung des Schenkels (2) derart versetzt sind, dass die Blechpaketmitten äußerer Blechpakete (31, 41) dichter am Schenkel (2) liegen als die Blechpaketmitten mittlerer Blechpakete (31, 41).Magnetic core (1) according to Claim 1,
characterized in that
the laminated core centers of the outer laminated cores (31, 41) are offset in the direction of the leg (2) such that the laminated core centers of outer laminated cores (31, 41) are closer to the leg (2) than the laminated core centers of medium laminated cores (31, 41). Magnetkern (1) nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass die Blechpakete (31, 41) zumindest eines der Joche (3, 4) derart ausgerichtet sind, dass - im Querschnitt und quer zur Stapelrichtung der Bleche betrachtet - die Mitten der Blechpakete (31, 41) auf einer krummlinigen Kurve liegen, die bezogen auf die Mitte des mittleren Blechpakets oder der mittleren Blechpakete (31, 41) achsensymmetrisch ist.Magnetic core (1) according to one of the preceding claims,
characterized in that the laminated cores (31, 41) of at least one of the yokes (3, 4) are aligned such that - viewed in cross-section and transverse to the stacking direction of the sheets - the centers of the laminated cores (31, 41) lie on a curvilinear curve, based on the center of the middle laminated core or the middle laminated core (31, 41) is axisymmetric. Magnetkern (1) nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass
bei zumindest einem der Joche (4) die Blechpakete (41) an der Schnittstelle zum Schenkel (2) eine geradlinige Jochkante (42) bilden.Magnetic core (1) according to one of the preceding claims,
characterized in that
in at least one of the yokes (4) form the laminated cores (41) at the interface to the leg (2) a straight yoke edge (42). Magnetkern (1) nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass
die Stufung im Bereich des Jochs (3, 4) dem Zweifachen der Stufung im Bereich des Schenkels (2) entspricht.Magnetic core (1) according to one of the preceding claims,
characterized in that
the grading in the region of the yoke (3, 4) corresponds to twice the grading in the region of the leg (2). Magnetkern (1) nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass
die Blechpakethöhe eines jeden Blechpakets des Jochs (3, 4) jeweils genauso groß wie die Blechpakethöhe des stirnkantenseitig gegenüberliegenden Blechpakets des Schenkels (2) ist.Magnetic core (1) according to one of the preceding claims,
characterized in that
the laminated core height of each stack of laminations of the yoke (3, 4) each have the same size as the laminated core height of the front edge side opposite laminated core of the leg (2). Magnetkern (1) nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass
bei zumindest einem der Joche (3, 4) die Blechpakete (31, 41) mittels einer Presseinrichtung zusammengepresst sind, die mindestes zwei Presseinheiten (91, 92) aufweist, - von denen zumindest eine Presseinheit (91) alle Blechpakete (31, 41) des Jochs (3, 4) zusammenpresst und - von denen zumindest eine Presseinheit (92) nur eine Teilmenge der Blechpakete (31, 41) des Jochs (3, 4) zusammenpresst. Magnetic core (1) according to one of the preceding claims,
characterized in that
in at least one of the yokes (3, 4) the laminated cores (31, 41) are pressed together by means of a pressing device which has at least two pressing units (91, 92), - Of which at least one pressing unit (91) presses all laminated cores (31, 41) of the yoke (3, 4) and - Of which at least one pressing unit (92) only a subset of the laminated cores (31, 41) of the yoke (3, 4) compresses. Magnetkern (1) nach Anspruch 7,
dadurch gekennzeichnet, dass
zumindest eine der Presseinheiten (91, 92) durch ein Spannband (200) gebildet ist oder ein Spannband (200) aufweist.Magnetic core (1) according to claim 7,
characterized in that
at least one of the press units (91, 92) is formed by a tension band (200) or has a tension band (200). Magnetkern (1) nach einem der voranstehenden Ansprüche 7-8,
dadurch gekennzeichnet, dass
zumindest eine der Presseinheiten (91, 92) einen Pressbolzen (94) aufweist, der zwei außenseitig am Joch (3, 4) anliegende und einander gegenüberliegende Presselemente auf das Joch (3, 4) drückt.Magnetic core (1) according to one of the preceding claims 7-8,
characterized in that
at least one of the press units (91, 92) has a press stud (94) which presses on the outside of the yoke (3, 4) abutting and opposing pressing elements on the yoke (3, 4). Magnetkern (1) nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass
die Pressung des Joches (3, 4) in Richtung Schenkelachse in mehrere Pressbereiche unterteilt ist und diese zumindest teilweise nicht die gesamte Schichtdicke des Kernjoches umfassen.Magnetic core (1) according to one of the preceding claims,
characterized in that
the pressing of the yoke (3, 4) in the direction of the leg axis is subdivided into a plurality of pressing regions and these do not at least partially cover the entire layer thickness of the core yoke. Magnetkern (1) nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass
die jeweils einen Teilbereich der Jochhöhe pressenden Presseinheiten (91, 92) mit jeweils eigenen, die Presskraft längs in Jochrichtung verteilenden Pressbalken (93) versehen sind.Magnetic core (1) according to one of the preceding claims,
characterized in that
each of a portion of the yoke height pressing press units (91, 92) are each provided with their own, the pressing force along in the yoke direction distributing press beams (93). Magnetkern (1) nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass
nur die dem Schenkel (2) gegenüberliegenden Pressbalken (93) mit der Wicklungsauflage (12) oder der Wicklungsverspannungseinrichtung (11) in Verbindung stehen.Magnetic core (1) according to one of the preceding claims,
characterized in that
only the press beam (93) opposite the leg (2) is in contact with the winding support (12) or the winding tensioning device (11). Magnetkern (1) nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass - eine Presseinheit (91, 92) zumindest eines Joches (3, 4) mit längs des Joches (3, 4) angeordneten Pressbalken (93) versehen ist und - diese Pressbalken (93) aus einem metallischen Material gefertigt sind und zumindest teilweise auf der der Wicklung (10) gegenüberliegenden Seite mit einer eine elektrische Abschirmung (96) bildenden runden Abschlussfläche versehen sind, deren Abstand von der Wicklungskante (112) der Wicklung (10) genau so groß wie der Abstand zwischen der Jochkante (32) und der Wicklungskante (112) oder kleiner als dieser Abstand ist. Magnetic core (1) according to one of the preceding claims,
characterized in that - A press unit (91, 92) at least one yoke (3, 4) with along the yoke (3, 4) arranged pressing bar (93) is provided and - These pressing bars (93) are made of a metallic material and at least partially on the winding (10) opposite side with an electrical Shield (96) are provided round end surface whose distance from the winding edge (112) of the winding (10) is exactly as large as the distance between the yoke edge (32) and the winding edge (112) or smaller than this distance. Magnetkern (1) nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass - für die axiale Verspannung der auf dem Schenkel (2) befindlichen Wicklung (10) zumindest ein Abstützelement (110, 111) vorgesehen ist, welches in Richtung Joch (3) zumindest teilweise angeschrägt ist, und - der Versatz der Mitten der äußeren Blechpakete (31) des Joches (3) derart gestaltet ist, dass die Stufung des Joches (3) der Kontur der Anschrägung des Abstützelements (110, 111) folgt. Magnetic core (1) according to one of the preceding claims,
characterized in that - For the axial strain of the on the leg (2) located winding (10) at least one support element (110, 111) is provided, which in the direction of the yoke (3) is at least partially bevelled, and - The offset of the centers of the outer laminated cores (31) of the yoke (3) is designed such that the gradation of the yoke (3) of the contour of the chamfer of the support element (110, 111) follows. Magnetkern (1) nach einem der voranstehenden Ansprüche,
dadurch gekennzeichnet, dass
die Blechpakete (41) des unter der Wicklung (10) befindlichen Joches (4) derart gegenüber der Mitte des mittleren Blechpaketes des Joches (4) verschoben sind, dass die Jochkante (42) auf der zum Schenkel (2) zeigenden Seite eine Linie bildet und die Wicklungsauflage (12) zur Lagerung der Wicklung (10) sich zumindest teilweise auf dieser Jochkante (42) direkt abstützt.Magnetic core (1) according to one of the preceding claims,
characterized in that
the laminated cores (41) of the yoke (4) located under the winding (10) are displaced relative to the middle of the middle laminated core of the yoke (4) such that the yoke edge (42) forms a line on the side facing the leg (2) and the winding support (12) for supporting the winding (10) is at least partially directly supported on this yoke edge (42).
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017223839A1 (en) * 2017-12-28 2019-07-04 Siemens Aktiengesellschaft Magnetic core with yoke legs
WO2020093589A1 (en) * 2018-11-09 2020-05-14 王永法 Transformer laminated core and preparation method therefor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB673210A (en) * 1950-02-13 1952-06-04 British Thomson Houston Co Ltd Laminated magnetic cores having improved cooling means
CH341896A (en) * 1955-12-30 1959-10-31 Oerlikon Maschf Nested iron body for transformers
GB1094442A (en) * 1964-03-02 1967-12-13 English Electric Co Ltd Laminated magnetic cores for inductive apparatus
DE2324644A1 (en) * 1973-05-16 1974-12-05 Schorsch Gmbh LAYERED CORE WITH COMPRESSED WINDING CONSTRUCTION AND WINDINGS FOR TRANSFORMERS OR REACTOR COILS ON LEGS OF THE CORE
JPS5230911U (en) * 1975-08-27 1977-03-04
US4140987A (en) * 1975-12-12 1979-02-20 Hitachi, Ltd. Core of a core-type transformer
WO2011133391A2 (en) * 2010-04-22 2011-10-27 Abb Technology Ag A transformer having a stacked core

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB673210A (en) * 1950-02-13 1952-06-04 British Thomson Houston Co Ltd Laminated magnetic cores having improved cooling means
CH341896A (en) * 1955-12-30 1959-10-31 Oerlikon Maschf Nested iron body for transformers
GB1094442A (en) * 1964-03-02 1967-12-13 English Electric Co Ltd Laminated magnetic cores for inductive apparatus
DE2324644A1 (en) * 1973-05-16 1974-12-05 Schorsch Gmbh LAYERED CORE WITH COMPRESSED WINDING CONSTRUCTION AND WINDINGS FOR TRANSFORMERS OR REACTOR COILS ON LEGS OF THE CORE
JPS5230911U (en) * 1975-08-27 1977-03-04
US4140987A (en) * 1975-12-12 1979-02-20 Hitachi, Ltd. Core of a core-type transformer
WO2011133391A2 (en) * 2010-04-22 2011-10-27 Abb Technology Ag A transformer having a stacked core

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017223839A1 (en) * 2017-12-28 2019-07-04 Siemens Aktiengesellschaft Magnetic core with yoke legs
WO2019129491A1 (en) * 2017-12-28 2019-07-04 Siemens Aktiengesellschaft Magnetic core with yoke limb
WO2020093589A1 (en) * 2018-11-09 2020-05-14 王永法 Transformer laminated core and preparation method therefor

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