EP0600059B1 - Coil body - Google Patents
Coil body Download PDFInfo
- Publication number
- EP0600059B1 EP0600059B1 EP93912606A EP93912606A EP0600059B1 EP 0600059 B1 EP0600059 B1 EP 0600059B1 EP 93912606 A EP93912606 A EP 93912606A EP 93912606 A EP93912606 A EP 93912606A EP 0600059 B1 EP0600059 B1 EP 0600059B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lower flange
- coil body
- webs
- flange
- coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004804 winding Methods 0.000 claims abstract description 10
- 229920006305 unsaturated polyester Polymers 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims abstract description 4
- 229920001187 thermosetting polymer Polymers 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000005476 soldering Methods 0.000 description 9
- 239000005011 phenolic resin Substances 0.000 description 6
- 229920001568 phenolic resin Polymers 0.000 description 6
- 239000004642 Polyimide Substances 0.000 description 5
- 239000000945 filler Substances 0.000 description 5
- 229920001721 polyimide Polymers 0.000 description 5
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 4
- 239000004922 lacquer Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
- H01F5/02—Coils wound on non-magnetic supports, e.g. formers
Definitions
- the invention relates to a coil former, in particular for RM cores.
- Coil formers which have a hollow cylinder which, together with an upper and a lower flange, forms a coil winding space.
- On the lower flange are essentially radially outwardly pointing webs which have a greater thickness than the lower flange. The webs hold protruding pins on their underside.
- a wire guide slot which is open on one side and radially outward, is arranged between two webs and ends with its closed end in the region of the lower flange near the outside of the hollow cylinder.
- the wire guide slots can be directed strictly radially or also be directed somewhat obliquely with respect to the radial direction.
- Such coil formers are known for RM cores by DIN 41981 and EP-A-0 033 943. They are made from a thermosetting phenolic resin.
- the copper wires of the coil windings have been provided with polyimide lacquers to increase the insulation.
- the thermal load on the coil body has become significantly higher. This leads to a high failure rate of the coil formers. Attempts to remedy this have so far been unsuccessful.
- this option is complex and considerably interferes with the other work processes.
- the problem on which the invention is based is therefore that the desired insulation of the winding wires with polyimide lacquers had to be risked either with a sufficient soldering temperature and duration, a thermal deformation of the coil former or with a lower soldering temperature and duration, inadequate soldering of the coil wires.
- the coil former according to the invention therefore no longer consists of a phenolic resin but of an unsaturated polyester.
- Unsaturated polyesters of this type can only be used for parts that are difficult to remove from the mold, such as RM bobbins, in the injection molding process if you have been given the usual additives that favor processability, such as conditioners, release agents, etc.
- a bobbin produced with such an unsaturated polyester has a temperature resistance which allows the soldering to be carried out, as is required for wires coated with polyimide lacquers, without the dimensional accuracy of the bobbin being impaired.
- a bobbin made of an unsaturated polyester has the disadvantage that its strength is significantly reduced. The flange breaking strength in the area of the webs is only about half as large as that when using phenolic resins.
- the present invention provides a bobbin that is mechanically equivalent to the phenolic resin bobbins, but has a higher temperature resistance, so that the soldering required for wires coated with polyimide lacquers can be carried out without dimensional accuracy problems for the bobbin.
- the filler web has a surface which slopes away radially to the outside.
- the bridge On its radially inner long side, the bridge is provided with an oblique edge, which merges into the web with a transition radius.
- the inclination of the edge is preferably about 7 °. This ensures good releasability of the coil former with high stability, which - in contrast to the previous coil former - does not show any shrinkage, but only shrinks in the shape itself. Without the formation of the bevels, an undercut could form in the shrinkage in the mold, which would lead to demolding problems.
- the bridge provided according to the invention is particularly advantageous for bobbins for RM cores of sizes ⁇ 4 and ⁇ 8. Bridges on the underside have not previously been provided for bobbins of this type.
- FIG. 1 shows a coil former for RM cores, which has a hollow cylinder 1 which is delimited on its upper side by an upper flange 2 and on its underside by a lower flange 3, as a result of which an annular winding space 4 is formed.
- connection pins 7 are usually injected into the webs 5, 6 during the manufacture of the coil former.
- FIG. 2 The top view of the flange 3 and the webs 5, 6 according to FIG. 2, which results from the section along the line II-II, shows that between the webs 5, 6 a radially outwardly open wire guide slot 8 is formed, which with its closed end 9 ends in the area of the lower flange 3 near the outside of the hollow cylinder 1. It can also be seen that the end 9 of the wire guide slot 8 is closed over a small distance by a filler web 10.
- This filler web 10 has - as in FIG. 1 reveals - a sloping radially outward top side.
- FIG. 1 illustrates that the shape of the webs 5, 6 corresponds to the expediency for automatic winding of the coil body and is known per se, so that a further explanation can be omitted here.
- Figure 2 illustrates that the wire guide slots 8 are not strictly radially aligned, but are slightly inclined relative to the radial direction. This orientation of the wire guide slots 8 is also known, for example by DIN 41981.
- the view of the bobbin shown in FIG. 3 from below illustrates the position of the section line I-I, along which the vertical section according to FIG. 1 has been made.
- Figure 3 also shows that the webs 5, 6 are thickened relative to the flange 3 and have known chamfered chambers 11, 12 for guiding the wire ends to the connecting pins 7.
- the webs 5, 6 are connected on the underside to a bridge 13 crossing the wire guide slot 8.
- the width of this bridge 13 is small and corresponds to only a fraction of the width of the lower flange 3.
- the radially inner longitudinal edge 14 of the bridge 13 is provided with a bevel of approximately 7 °, which passes into the material of the flange 3 with a transition radius 15.
- the coil former shown consists of a thermosetting unsaturated polyester which has been modified by the addition of release agents and conditioners in such a way that it can be processed reliably using injection molding technology.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulating Of Coils (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Winding Filamentary Materials (AREA)
- Manufacture Of Motors, Generators (AREA)
- Organic Insulating Materials (AREA)
- Macromonomer-Based Addition Polymer (AREA)
Abstract
Description
Die Erfindung betrifft einen Spulenkörper, insbesondere für RM-Kerne.The invention relates to a coil former, in particular for RM cores.
Es sind Spulenkörper bekannt, die einen Hohlzylinder aufweisen, der zusammen mit einem oberen und einem unteren Flansch einen Spulenwickelraum bildet. An dem unteren Flansch sind im wesentlichen radial nach außen zeigende Stege angesetzt, die eine größere Dicke aufweisen als der untere Flansch. Die Stege halten an Ihrer Unterseite herausragende Anschlußstifte. Zwischen jeweils zwei Stegen ist ein einseitig nach radial außen offener Drahtführungsschlitz angeordnet, der mit seinem geschlossenen Ende im Bereich des unteren Flansches nahe der Außenseite des Hohlzylinders endet. Die Drahtführungsschlitze können dabei streng radial gerichtet sein oder auch gegenüber der radialen Richtung etwas schräg gerichtet sein. Derartige Spulenkörper sind für RM-Kerne durch DIN 41981 und EP-A- 0 033 943 bekannt. Sie werden aus einem duroplastischen Phenolicharz hergestellt.Coil formers are known which have a hollow cylinder which, together with an upper and a lower flange, forms a coil winding space. On the lower flange are essentially radially outwardly pointing webs which have a greater thickness than the lower flange. The webs hold protruding pins on their underside. A wire guide slot, which is open on one side and radially outward, is arranged between two webs and ends with its closed end in the region of the lower flange near the outside of the hollow cylinder. The wire guide slots can be directed strictly radially or also be directed somewhat obliquely with respect to the radial direction. Such coil formers are known for RM cores by DIN 41981 and EP-A-0 033 943. They are made from a thermosetting phenolic resin.
Seit einiger Zeit werden die Kupferdrähte der Spulenwicklungen zur Erhöhung der Isolierung mit Polyimid-Lacken versehen. Hierdurch ist eine Erhöhung der Löttemperatur auf über 500° C bei einer Lötdauer von ca. 3 Sekunden erforderlich. Gegenüber den bisherigen Löttemperaturen von 350 bis 420° C und einer Lötdauer von ca. einer Sekunde ist somit die thermische Belastung des Spulenkörpers erheblich höher geworden. Diese führt zu einer hohen Ausfallrate der Spulenkörper. Bisherige Versuche, hier Abhilfe zu schaffen, sind erfolglos geblieben. Es besteht allenfalls die Möglichkeit, die Polyimidisolierung am Wickeldraht durch Strippen - also mechanisch - zu entfernen. Diese Möglichkeit ist jedoch aufwendig und stört die übrigen Arbeitsabläufe erheblich.For some time now, the copper wires of the coil windings have been provided with polyimide lacquers to increase the insulation. This requires an increase in the soldering temperature to over 500 ° C with a soldering time of approx. 3 seconds. Compared to the previous soldering temperatures of 350 to 420 ° C and a soldering time of approx. One second, the thermal load on the coil body has become significantly higher. This leads to a high failure rate of the coil formers. Attempts to remedy this have so far been unsuccessful. At most, it is possible to remove the polyimide insulation on the winding wire by stripping - that is, mechanically. However, this option is complex and considerably interferes with the other work processes.
Das der Erfindung zugrundeliegende Problem besteht somit darin, daß bei der gewünschten Isolierung der Wickeldrähte mit Polyimid-Lacken entweder bei einer ausreichenden Löttemperatur und -dauer eine thermische Verformung des Spulenkörpers oder bei einer geringeren Löttemperatur und -dauer eine mangelhafte Verlötung der Spulendrähte riskiert werden mußte.The problem on which the invention is based is therefore that the desired insulation of the winding wires with polyimide lacquers had to be risked either with a sufficient soldering temperature and duration, a thermal deformation of the coil former or with a lower soldering temperature and duration, inadequate soldering of the coil wires.
Ausgehend von dieser Problemstellung weist ein Spulenkörper, insbesondere ein Spulenkörper für RM-Kerne, erfindungsgemäß folgende Merkmale auf:
- a) Ein Hohlzylinder bildet zusammen mit einem oberen und einem unteren Flansch einen Spulenwickelraum.
- b) An dem unteren Flansch sind im wesentlichen nach radial außen zeigende Stege angesetzt, die eine größere Dicke aufweisen als der untere Flansch.
- c) Die Stege halten aus ihrer Unterseite herausragende Anschlußstifte.
- d) Zwischen jeweils zwei Stegen ist ein einseitig nach radial außen offener Drahtführungsschlitz angeordnet, der mit seinem geschlossenen Ende im Bereich des unteren Flansches nahe der Außenseite des Hohlzylinders endet.
- e) Am geschlossenen Ende sind die Drahtführungsschlitze über ein kleines Stück durch einen Füllsteg verschlossen, dessen Oberseite abgestuft unter der Oberseite des unteren Flansches liegt.
- f) Auf ihrer Unterseite sind die Stege durch eine den Drahtführungsschlitz querende Brücke verbunden, die sich über die Unterseite des Füllstegs erstreckt und mit diesem verbunden ist.
- g) Der Spulenkörper ist aus einem duroplastischen ungesättigten Polyester hergestellt, der die Verarbeitbarkeit begünstigende Zusätze enthält.
- a) A hollow cylinder forms a coil winding space together with an upper and a lower flange.
- b) On the lower flange there are essentially webs pointing radially outwards, which have a greater thickness than the lower flange.
- c) The webs hold connecting pins protruding from their underside.
- d) Between each of two webs there is a wire guide slot which is open on one side radially outwards and which ends with its closed end in the region of the lower flange near the outside of the hollow cylinder.
- e) At the closed end, the wire guide slots are closed by a small piece by a filler, the top of which is stepped below the top of the lower flange.
- f) On their underside, the webs are connected by a bridge crossing the wire guide slot, which extends over the underside of the filler web and is connected to it.
- g) The bobbin is made of a thermosetting unsaturated polyester which contains additives which favor processing.
Der erfindungsgemäße Spulenkörper besteht somit nicht mehr aus einem Phenolicharz sondern aus einem ungesättigten Polyester. Derartige ungesättigte Polyester sind für hinsichtlich der Entformung so diffizile Teile wie RM-Spulenkörper im Spritzgußverfahren nur verwendbar, wenn Ihnen übliche, die Verarbeitbarkeit begünstigende Zusätze beigegeben worden sind, wie beispielsweise Conditioner, Trennmittel usw.The coil former according to the invention therefore no longer consists of a phenolic resin but of an unsaturated polyester. Unsaturated polyesters of this type can only be used for parts that are difficult to remove from the mold, such as RM bobbins, in the injection molding process if you have been given the usual additives that favor processability, such as conditioners, release agents, etc.
Ein mit einem derartigen ungesättigten Polyester hergestellter Spulenkörper weist eine Temperaturbeständigkeit auf, die die Durchführung der Verlötung, wie sie bei mit Polyimid-Lacken beschichteten Drähten erforderlich ist, erlaubt, ohne daß die Maßhaltigkeit des Spulenkörpers beeinträchtigt wird. Ein aus einem ungesättigten Polyester hergestellter Spulenkörper weist jedoch den Nachteil auf, daß seine Festigkeit erheblich verringert ist. Die Flanschbruchfestigkeit im Bereich der Stege ist nur etwa halb so groß wie die bei der Verwendung von Phenolicharzen.A bobbin produced with such an unsaturated polyester has a temperature resistance which allows the soldering to be carried out, as is required for wires coated with polyimide lacquers, without the dimensional accuracy of the bobbin being impaired. However, a bobbin made of an unsaturated polyester has the disadvantage that its strength is significantly reduced. The flange breaking strength in the area of the webs is only about half as large as that when using phenolic resins.
Es konnte daran gedacht werden, die Dicke der Flansche zu erhöhen, um die benötigte Flanschbruchfestigkeit zu erreichen.It could be considered to increase the thickness of the flanges in order to achieve the required flange breaking strength.
Hierdurch würde jedoch entweder die Höhe des Spulenkörpers unzulässig vergrößert (vgl. DIN 41981) oder der Spulenwickelraum verkleinert, was für die Anwender nicht akzeptabel ist.However, this would either increase the height of the coil body inadmissibly (cf. DIN 41981) or reduce the coil winding space, which is unacceptable for the users.
Überraschenderweise ist festgestellt worden, daß die Flanschbruchfestigkeit in dem erforderlichen Maße bereits durch die oben angegebenen, erfindungsgemäß vorgesehenen Merkmale e) und f) erhöht wird.Surprisingly, it has been found that the flange breaking strength is increased to the required extent by the features e) and f) specified above and provided according to the invention.
Die Realisierung der Merkmale e) und f) an Spulenkörpern, auch an RM-Spulenkörpern, ist an sich bereits bekannt gewesen. Die Ausbildung einer Brücke an der Unterseite der Stege und einer abgestuften Einführung in den Drahtführungsschlitz ist bei den bekannten Spulenkörpern aus Gründen der Festigkeit gegenüber Spannungsüberschlägen realisiert worden, nicht jedoch aus Gründen der mechanischen Festigkeit, weil bei der Verwendung der bisherigen Phenolicharze keine mechanischen Festigkeitsprobleme auftraten. Überraschenderweise führt jedoch die an sich bekannte Maßnahme des Vorsehens einer die Stege verbindenden Brücke an der Unterseite der Stege bereits zu einer solchen Erhöhung der mechanischen Festigkeit eines Spulenkörpers aus einem ungesättigten Polyester, daß dieser ohne weitere Maßnahmen in mechanischer Hinsicht für die gleichen Anwendungen wie die bisherigen Phenolicharz-Spulenkörper genutzt werden kann.The realization of the features e) and f) on bobbins, also on RM bobbins, has already been known per se. The Forming a bridge on the underside of the webs and a stepped insertion into the wire guide slot has been realized in the known coil formers for reasons of strength against flashovers, but not for reasons of mechanical strength, because no mechanical strength problems arose when using the previous phenolic resins. Surprisingly, however, the known measure of providing a bridge connecting the webs on the underside of the webs already leads to such an increase in the mechanical strength of a coil former made of an unsaturated polyester that it can be used mechanically for the same applications as the previous ones without further measures Phenolic resin bobbin can be used.
Somit ist durch die vorliegende Erfindung ein Spulenkörper angegeben, der mechanisch zu den Phenolicharz-Spulenkörpern praktisch gleichwertig ist, jedoch eine höhere Temperaturbeständigkeit aufweist, so daß die für mit Polyimid-Lacken beschichteten Drähte erforderliche Verlötung ohne Maßhaltigkeitsprobleme für den Spulenkörper durchgeführt werden kann.Thus, the present invention provides a bobbin that is mechanically equivalent to the phenolic resin bobbins, but has a higher temperature resistance, so that the soldering required for wires coated with polyimide lacquers can be carried out without dimensional accuracy problems for the bobbin.
In einer für die Stabilität günstigen Ausführungsform weist der Füllsteg an seiner Oberfläche eine nach radial außen abfallende Oberfläche auf.In an embodiment which is favorable for stability, the filler web has a surface which slopes away radially to the outside.
Die Brücke ist an ihrer radial innen liegenden Längsseite mit einer schrägen Kante versehen, die mit einem Übergangsradius in den Steg übergeht. Die Schrägstellung der Kante beträgt dabei vorzugsweise ca. 7°. Hierdurch wird bei hoher Stabilität eine gute Entformbarkeit des Spulenkörpers gewährleistet, der - im Gegensatz zu den bisherigen Spulenkörpern - keinen Nachschwund aufweist, sondern ausschließlich in der Form selbst schwindet. Ohne die Ausbildung der Schrägen könnte sich bei der Schwindung in der Form eine Hinterschneidung ausbilden, die zu Entformungsproblemen führen würde.On its radially inner long side, the bridge is provided with an oblique edge, which merges into the web with a transition radius. The inclination of the edge is preferably about 7 °. This ensures good releasability of the coil former with high stability, which - in contrast to the previous coil former - does not show any shrinkage, but only shrinks in the shape itself. Without the formation of the bevels, an undercut could form in the shrinkage in the mold, which would lead to demolding problems.
Die erfindungsgemäß vorgesehene Brücke ist besonders vorteilhaft für Spulenkörper für RM-Kerne der Größen ≥ 4 und ≤ 8. Für derartige Spulenkörper sind bisher Brücken an der Unterseite nicht vorgesehen gewesen.The bridge provided according to the invention is particularly advantageous for bobbins for RM cores of sizes ≥ 4 and ≤ 8. Bridges on the underside have not previously been provided for bobbins of this type.
Die Erfindung soll im folgenden anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert werden. Es zeigen:
- Figur 1 -
- einen durch zwei Drahtführungsschlitze hindurchlaufenden Vertikalschnitt durch einen Spulenkörper
- Figur 2 -
- einen Horizontalschnitt durch den Spulenkörper gemäß Figur 1 entlang der Linie II-II
- Figur 3 -
- eine Ansicht des Spulenkörpers gemäß Figur 1 von unten
- Figure 1 -
- a vertical section through two wire guide slots through a coil body
- Figure 2 -
- a horizontal section through the bobbin according to Figure 1 along the line II-II
- Figure 3 -
- a view of the coil body according to Figure 1 from below
Figur 1 zeigt einen Spulenkörper für RM-Kerne, der einen Hohlzylinder 1 aufweist, der an seiner Oberseite durch einen oberen Flansch 2 und an seiner Unterseite durch einen unteren Flansch 3 begrenzt ist, wodurch ein ringförmiger Wickelraum 4 gebildet ist.FIG. 1 shows a coil former for RM cores, which has a hollow cylinder 1 which is delimited on its upper side by an
An den unteren Flansch 3 sind auf zwei gegenüberliegenden Seiten jeweils zwei radial etwa nach außen weisende Stege 5, 6 angesetzt, die nach unten aus den Stegen 5, 6 herausragende Anschlußstifte 7 halten. Zu diesem Zweck sind die Anschlußstifte 7 üblicherweise in die Stege 5, 6 bei der Herstellung des Spulenkörpers eingespritzt.Attached to the
Die sich beim Schnitt entlang der Linie II-II ergebende Draufsicht auf den Flansch 3 und die Stege 5, 6 gemäß Figur 2 verdeutlicht, daß zwischen den Stegen 5, 6 jeweils ein radial nach außen offener Drahtführungsschlitz 8 gebildet ist, der mit seinem geschlossenen Ende 9 im Bereich des unteren Flansches 3 nahe der Außenseite des Hohlzylinders 1 endet. Erkennbar ist ferner, daß das Ende 9 des Drahtführungsschlitzes 8 über ein kleines Stück durch einen Füllsteg 10 geschlossen ist. Dieser Füllsteg 10 weist - wie Figur 1 erkennen läßt - eine schräg nach radial außen abfallende Oberseite auf.The top view of the
Die Formengebung der Stege 5, 6 entspricht den Zweckmäßigkeiten für eine automatische Bewicklung des Spulenkörpers und ist an sich bekannt, so daß auf eine weitere Erläuterung hier verzichtet werden kann. Figur 2 verdeutlicht noch, daß die Drahtführungsschlitze 8 nicht streng radial ausgerichtet sind, sondern gegenüber der radialen Richtung etwas schräg gestellt sind. Auch diese Ausrichtung der Drahtführungsschlitze 8 ist - beispielsweise durch DIN 41981 - bekannt.The shape of the
Die in Figur 3 dargestellte Ansicht des Spulenkörpers von unten verdeutlicht die Lage der Schnittlinie I-I, entlang derer der Vertikalschnitt gemäß Figur 1 vorgenommen worden ist.The view of the bobbin shown in FIG. 3 from below illustrates the position of the section line I-I, along which the vertical section according to FIG. 1 has been made.
Figur 3 zeigt ferner, daß die Stege 5, 6 gegenüber dem Flansch 3 verdickt ausgeführt sind und an sich bekannte abgeschrägte Kammern 11, 12 zur Führung der Drahtenden zu den Anschlußstiften 7 aufweisen. Die Stege 5, 6 sind an der Unterseite mit einer den Drahtführungsschlitz 8 querenden Brücke 13 verbunden. Die Breite dieser Brücke 13 ist gering und entspricht nur einem Bruchteil der Breite des unteren Flansches 3.Figure 3 also shows that the
Wie Figur 1 erkennen läßt, ist die radial innen liegende Längskante 14 der Brücke 13 mit einer Schräge von ca. 7° versehen, die mit einem Übergangsradius 15 in das Material des Flansches 3 übergeht.As can be seen in FIG. 1, the radially inner
Der dargestellte Spulenkörper besteht aus einem duroplastischen ungesättigten Polyester, der durch Zugabe von Trennmitteln und Conditionern so modifiziert worden ist, daß er prozeßsicher in Spritzgußtechnik verarbeitbar ist.The coil former shown consists of a thermosetting unsaturated polyester which has been modified by the addition of release agents and conditioners in such a way that it can be processed reliably using injection molding technology.
Claims (5)
- Coil body, particularly for RM cores, having the following features:a) A hollow cylinder (1) forms, in conjunction with an upper flange (2) and a lower flange (3), a coil-winding space (4).b) Attached to the lower flange (3) are webs (5, 6) which essentially point in the radially outward direction and have a greater thickness than the lower flange (3).c) The webs (5, 6) hold connection pins (7) which project from their lower side.d) Disposed between each pair of webs (5, 6) is a wire-guiding slot (8) which is open in the radially outward direction at one end and which terminates with its closed end (9) in the region of the lower flange (3) near the outer side of the hollow cylinder (1).e) At the closed end (9), the wire-guiding slots (8) are closed, over a small portion, by a filling web (10), the upper side of which is located in a stepped manner under the upper side of the lower flange (3).f) On their lower side, the webs (5, 6) are connected by a bridge (13) which crosses the wire-guiding slot (8) and which extends over the lower side of the filling web (10) and is connected to the latter.g) The coil body is manufactured from a thermosetting plastic unsaturated polyester, which contains additives that promote workability.
- Coil body according to claim 1, wherein the upper side of the filling web (10) has a surface which drops away in the radially outward direction in an inclined manner.
- Coil body according to claim 1 or 2, wherein a radially inner longitudinal edge (14) of the bridge (13) has an inclination which merges into the material of the lower flange (3) by means of a transition radius (15).
- Coil body according to claim 3, wherein the inclination of the longitudinal edge (14) amounts to about 7°.
- Coil body according to one of claims 1 to 4, as a coil body for RM cores of sizes ≥ RM 4 and ≤ RM 8.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4220287A DE4220287C2 (en) | 1992-06-20 | 1992-06-20 | Coil body made of thermosetting unsaturated polyester |
| DE4220287 | 1992-06-20 | ||
| PCT/DE1993/000539 WO1994000857A1 (en) | 1992-06-20 | 1993-06-18 | Coil body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0600059A1 EP0600059A1 (en) | 1994-06-08 |
| EP0600059B1 true EP0600059B1 (en) | 1996-08-21 |
Family
ID=6461489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93912606A Expired - Lifetime EP0600059B1 (en) | 1992-06-20 | 1993-06-18 | Coil body |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0600059B1 (en) |
| AT (1) | ATE141711T1 (en) |
| CA (1) | CA2114948A1 (en) |
| DE (3) | DE4220287C2 (en) |
| WO (1) | WO1994000857A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4418246C2 (en) * | 1994-05-25 | 1997-12-18 | Hohenloher Kunststofftechnik G | Coil body and electrical coil constructed with it |
| US5774036A (en) * | 1995-06-30 | 1998-06-30 | Siemens Electric Limited | Bobbin-mounted solenoid coil and method of making |
| DE19818040C1 (en) * | 1998-04-22 | 1999-11-04 | Siemens Matsushita Components | Plastic coil body for Surface Mounted Device |
| DE10114182C2 (en) * | 2001-03-23 | 2003-04-03 | Epcos Ag | Inductive component with wire guide slots |
| WO2008061998A1 (en) * | 2006-11-22 | 2008-05-29 | Osram Gesellschaft mit beschränkter Haftung | Induction coil and method for producing an induction coil |
| CN102910486B (en) | 2011-08-03 | 2015-01-07 | 台达电子企业管理（上海）有限公司 | Winder and method for winding wire on winder |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3004747C2 (en) * | 1980-02-08 | 1982-05-06 | Siemens AG, 1000 Berlin und 8000 München | Bobbins for electric coils |
| DE3433700A1 (en) * | 1984-09-13 | 1986-03-20 | Siemens AG, 1000 Berlin und 8000 München | Winding former for an electrical transformer |
-
1992
- 1992-06-20 DE DE4220287A patent/DE4220287C2/en not_active Expired - Lifetime
- 1992-06-20 DE DE9218610U patent/DE9218610U1/en not_active Expired - Lifetime
-
1993
- 1993-06-18 WO PCT/DE1993/000539 patent/WO1994000857A1/en active IP Right Grant
- 1993-06-18 DE DE59303494T patent/DE59303494D1/en not_active Expired - Fee Related
- 1993-06-18 CA CA002114948A patent/CA2114948A1/en not_active Abandoned
- 1993-06-18 AT AT93912606T patent/ATE141711T1/en not_active IP Right Cessation
- 1993-06-18 EP EP93912606A patent/EP0600059B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2114948A1 (en) | 1993-12-21 |
| EP0600059A1 (en) | 1994-06-08 |
| DE4220287A1 (en) | 1993-12-23 |
| ATE141711T1 (en) | 1996-09-15 |
| DE9218610U1 (en) | 1994-10-06 |
| DE59303494D1 (en) | 1996-09-26 |
| WO1994000857A1 (en) | 1994-01-06 |
| DE4220287C2 (en) | 1994-11-24 |
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