EP0777239B1 - Casing arrangement for containing a transformer - Google Patents

Casing arrangement for containing a transformer Download PDF

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Publication number
EP0777239B1
EP0777239B1 EP95118991A EP95118991A EP0777239B1 EP 0777239 B1 EP0777239 B1 EP 0777239B1 EP 95118991 A EP95118991 A EP 95118991A EP 95118991 A EP95118991 A EP 95118991A EP 0777239 B1 EP0777239 B1 EP 0777239B1
Authority
EP
European Patent Office
Prior art keywords
chamber
casing
housing
arrangement according
casing arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95118991A
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German (de)
French (fr)
Other versions
EP0777239A1 (en
Inventor
Erich Aichele
Gerhard Lauffer
Manfred Hochfeld
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Era-Elektrotechnik GmbH
Original Assignee
Era-Elektrotechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Era-Elektrotechnik GmbH filed Critical Era-Elektrotechnik GmbH
Priority to AT95118991T priority Critical patent/ATE193614T1/en
Priority to EP95118991A priority patent/EP0777239B1/en
Priority to DE59508434T priority patent/DE59508434D1/en
Priority to PT95118991T priority patent/PT777239E/en
Priority to ES95118991T priority patent/ES2149916T3/en
Publication of EP0777239A1 publication Critical patent/EP0777239A1/en
Application granted granted Critical
Publication of EP0777239B1 publication Critical patent/EP0777239B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/022—Encapsulation
    • 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
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • H01F2027/406—Temperature sensor or protection

Definitions

  • the invention relates to a housing arrangement for potting Inclusion of a Transformer using a PTC resistor connected is.
  • the closest prior art is in FR-A-2 332 602.
  • PTC resistors positive temperature coefficient
  • the PTC resistor together with the transformer in a sealing compound e.g. out Epoxy resin, encapsulated (see FR-A-2 332 602).
  • the potting compound increases heat dissipation from the transformer, so bigger Power can be switched, or the transformer can be made smaller.
  • the potting of the PTC resistor leads to the fact that the customer Safety requirements are not circumvented as the PTC resistor is firmly connected to the transformer.
  • a damaged PTC resistor has the consequence that the protection the electronic unit fails in the event of an overcurrent. The result is excessive heating of the transformer, that can lead to fire.
  • a selective heating of the potting compound continues to lead to accelerated aging of the potting compound. There may be flashovers come in the area of the PTC resistor. If an arc forms, there is also a risk of fire very high.
  • Electromagnets with a PTC resistor connected and together with him in one housing are potted, see e.g. US-A-5 204 044.
  • the object of the invention is when using the known Potting technology for a transformer to specify a variant that ensures safe functioning of the PTC resistance guaranteed.
  • the invention solves this problem in a housing arrangement type mentioned by a separate chamber for receiving of the PTC resistor.
  • the PTC resistor Since the PTC resistor is in a separate chamber, it is not in direct contact with the sealing compound. In particular he does not come with the manufacturing process warm casting compound in contact. If the casting compound cools down, so mechanical stresses can only occur on the walls of the chamber, since only these are in contact with the sealing compound. Through the chamber can thus effectively prevent the mechanical stresses when the casting compound cools, the doped ceramic body the PTC resistor.
  • the chamber for the PTC resistor is in the housing arrangement included separately, so that the invention further ensures that a customer of the transformer meets the safety requirements e.g. do not bypass for cost reasons can.
  • the chamber one on an outside of the encapsulated housing arrangement has a lying opening. Through the opening on the outside of the Housing arrangement, the chamber is accessible at all times, so that the PTC resistance both before and after potting the Transformer can be installed. Furthermore, that Protective element during or after operation of the transformer check from outside and replace if necessary.
  • This closure element can be one with a side wall the housing arrangement connected hinged cover or a can be placed on the chamber preferably in a snug fit Cover.
  • An inexpensive variant is that the opening is attached to the housing arrangement so that when mounting the housing arrangement on a carrier, e.g. a circuit board, the opening closed by the carrier becomes.
  • An embodiment of the invention is that the Chamber arranged in a housing receiving the transformer is. Because the outer dimensions of the housing are standardized and the customers have adjusted to these dimensions, is achieved by placing the chamber inside the housing, that the outer dimensions of the housing do not change and thus the customers also the constructive structure do not have to change their devices.
  • the chamber is integrally formed on the housing. Through this The chamber can be made simultaneously with the housing be so that only little additional through the chamber Production costs arise.
  • the chamber can also be manufactured as a single part by measures known to the person skilled in the art in a later work step connected to the housing or the transformer. To these measures include gluing, screwing, riveting, etc. That Connecting the chamber is done by using locking elements, especially of push buttons and clips, particularly simple.
  • Figures 1a, 1b and 1c show a first housing 10 in one Bottom, front and side view. The bottom view is shown in Figure 1a.
  • a chamber 12 is on the left housing wall 14 integrally formed in the interior of the housing 10.
  • a recess 16 in a wall 18 of the chamber 12 enables the laying of an electrical line (see FIG. 3) between the interior of the chamber 12 and the interior of the housing 10th
  • Figure 1b Under the bottom view in Figure 1b is the front view of the Housing 10 shown. Another recess 20 in the Chamber 12 allows another line to be laid (see Figure 3) between the chamber 12 and the interior of the housing 10. A representation of section III-III is based on of Figure 3 explained in more detail.
  • Figure 1c shows a side view of the housing 10. The expansion of the chamber 12 in its Longitudinal direction and its height, as well as its position in the housing 10 are clear in Figure 1c.
  • FIGS 2a, b and c show a second housing 30 in one Bottom, front and side view.
  • FIG 2a the bottom view of the housing 30 is shown.
  • a chamber 32 is integrally formed on the wall 34 outside the housing 30.
  • Two cutouts 36 and 38 in the housing wall 34 are used to hold electrical cables (see Figure 4) between chamber 32 and the interior of housing 30.
  • FIG. 2b The front view is located below the bottom view in FIG. 2b the housing 30.
  • a representation of the section IV-IV is explained below with reference to FIG. 4.
  • Figure 2c shows the side view of the housing 30, the location of the Chamber 32 makes clear with respect to the housing 30.
  • FIG 3 shows the housing 10 as section III-III of Figure 1b.
  • the interior of the housing 10 has a potting compound 50 filled out.
  • the walls of the chamber 12 hold the sealing compound 50 from a PTC resistor 52.
  • Leads 54 and 56 of the PTC resistors are connected via connection points 58 and 60 Lines 42 and 44 to one inside the potting compound 30 contained electronic unit connected.
  • the administration 62 or 64 runs through the cutouts 16 or 20.
  • Figure 4 shows the housing 30 as section IV-IV accordingly Figure 2b.
  • the inside of the housing 30, which is also not one contains the transformer shown is with the sealing compound 70 filled.
  • the housing wall 34 holds the sealing compound 50 from a PTC resistor 72 inside the chamber 32.
  • a supply line 74 is via a junction 76 with a line 78 connected by the recess 36 from the chamber 32 extends inside the housing 30.
  • Figures 5a, b and c show a first embodiment of a Closure one instead of the chamber 12 on the housing 10 molded chamber 12 'with a cap 90.
  • the chamber 12 ' has reinforced walls. Between an inner wall 92 and an outer wall 94 of chamber 12 'is one Groove 96.
  • Figure 5b shows the section V-V of the chamber 12 'of Figure 5a.
  • the depth of the groove 96 can be seen in FIG. 5b. she agrees with the height of the cap 90 according to the figure 5c match.
  • the closure cover 90 is designed that it is pressed into the groove 96 under pressure. Because of a snug fit creates a non-positive connection between Cap 90 and chamber 12 '. So that the chamber 12 'closed after inserting the PTC resistor 52 be so that the PTC resistance from environmental influences and is protected against unwanted touch.
  • Figures 6a, b and c show a second embodiment a closure instead of the chamber 12 on the housing 10 molded chamber 12 "with a cap 100.
  • Figure 6b shows the section VI-VI of the chamber 12 "according to Figure 6a.
  • the depth of the holes 114 and 116 is too recognize that also corresponds to the depth of the bores 110 and 112.
  • the opening of the chamber 12 " is chamfered.
  • the in Figure 6c shown cap 100 is also in its Edge areas chamfered so that it optimally the chamber 12 " can close. There are locks in the corner areas of the cap 100 pins, of which in figure 6c pins 118 and 120 are shown.
  • the length of the Pins 118 and 120 and their diameter match that Diameter and length of the associated bores 114 and 116 roughly match.
  • the chamber 12 " is closed by inserting the cap 100 under pressure in the opening of the chamber 12 ". Due to a snug fit the Closure cover 100 held by the chamber 12 " is a secure closing and also an opening of the chamber 12 "possible at any time.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Casings For Electric Apparatus (AREA)
  • Details Of Resistors (AREA)
  • Dc-Dc Converters (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Transformers For Measuring Instruments (AREA)

Abstract

The housing arrangement has a separate chamber (12) for housing the protective element, which is in the form of a positive temp. coefficient resistance (PTC). The chamber has an opening on the outer surface of the housing. The opening has a closure element. The closure element is formed by a carrier on which the housing arrangement is mounted. Alternatively, the closure element can have a hinged connection to the side wall of the housing arrangement.

Description

Die Erfindung betrifft eine Gehäuseanordnung zur vergossenen Aufnahme eines Transformators, der mit einem PTC-Widerstand verbunden ist. Der nächstliegende Stand der Technik ist in FR-A-2 332 602 beschrieben.The invention relates to a housing arrangement for potting Inclusion of a Transformer using a PTC resistor connected is. The closest prior art is in FR-A-2 332 602.

Für Transformatoren, müssen Sicherheitsanforderungen hinsichtlich Überstrom eingehalten werden. Diese Sicherheitsanforderungen sollen Umgebungsschäden verhüten, wenn durch einen Windungs- oder Kurzschluß eine übermäßige Strombelastung auftritt, welche zu Brandschäden an dem Transformator und in der Umgebung führen kann. Bekannt ist der Einsatz von PTC-Widerständen (PTC:positive temperature coefficient) als Schutzelement gegen Überstrom. Insbesondere wird der PTC-Widerstand gemeinsam mit dem Transformator in einer Vergußmasse, z.B. aus Epoxidharz, vergossen (siehe FR-A-2 332 602). Die Vergußmasse erhöht dabei die Wärmeableitung von dem Transformator, so daß größere Leistungen geschaltet werden können, bzw. der Transformator kleiner ausgeführt werden kann. Das Mitvergießen des PTC-Widerstands führt dazu, daß der Abnehmer die Sicherheitsanforderungen nicht umgeht, da der PTC-Widerstand fest mit dem Transformator verbunden ist. For transformers, safety requirements regarding overcurrent must be met become. These safety requirements are designed to damage the environment prevent if by a turn or short circuit an excessive current load occurs, which leads to Cause fire damage to the transformer and the surrounding area can. The use of PTC resistors (PTC: positive temperature coefficient) as a protective element is known against overcurrent. In particular, the PTC resistor together with the transformer in a sealing compound, e.g. out Epoxy resin, encapsulated (see FR-A-2 332 602). The potting compound increases heat dissipation from the transformer, so bigger Power can be switched, or the transformer can be made smaller. The potting of the PTC resistor leads to the fact that the customer Safety requirements are not circumvented as the PTC resistor is firmly connected to the transformer.

Durch das Vergießen eines PTC-Widerstandes entstehen neue Sicherheitsrisiken. Die bisherige Vergußtechnik sieht keine Maßnahmen vor, um ein Beschädigen des PTC-Widerstands durch die warme Vergußmasse beim Herstellungsverfahren zu vermeiden. Beim Abkühlen der Vergußmasse kommt es zu Spannungen, die sich auch auf den PTC-Widerstand übertragen und zu dessen Beschädigung führen können, indem feine Haarrisse entstehen.By shedding of a PTC resistor creates new security risks. The previous potting technology does not provide any measures to prevent damage of the PTC resistance due to the warm sealing compound to avoid in the manufacturing process. When cooling the Potting compound leads to tensions that also affect the Transfer PTC resistor and lead to its damage can result from fine hairline cracks.

Ein beschädigter PTC-Widerstand hat zur Folge, daß der Schutz der elektronischen Baueinheit im Falle eines Überstroms versagt. Die Folge ist eine übermäßige Erhitzung des Transformators, die zu Bränden führen kann.A damaged PTC resistor has the consequence that the protection the electronic unit fails in the event of an overcurrent. The result is excessive heating of the transformer, that can lead to fire.

Bei einer übermäßigen Strombelastung fließt durch den PTC-Widerstand ein Ruhestrom, wodurch sich der PTC-Widerstand bis auf 180°C erwärmen kann. Die Folge ist ein punktuelles Erhitzen der Vergußmasse. Befinden sich mit Isolierlack versehene Drähte eines Transformators in der Nähe der erhitzten Vergußmasse, so ann die Isolierung beschädigt werden, wodurch der Transformator weiter beschädigt wird, womit der Schaden durch den PTC-Widerstand nicht begrenzt, sondern vergrößert wird.If the current load is excessive, it flows through the PTC resistor a quiescent current, causing the PTC resistance to rise can heat up to 180 ° C. The result is selective heating the sealing compound. Are provided with insulating varnish Wires of a transformer near the heated one Potting compound, so ann the insulation will be damaged, causing the transformer is further damaged, with what the damage from the PTC resistor is not limited, but is enlarged.

Ein punktuelles Erhitzen der Vergußmasse führt weiterhin zu einem beschleunigten Altern der Vergußmasse. Es kann zu Spannungsüberschlägen im Bereich des PTC-Widerstandes kommen. Bildet sich ein Lichtbogen, so ist die Brandgefahr ebenfalls sehr hoch.A selective heating of the potting compound continues to lead to accelerated aging of the potting compound. There may be flashovers come in the area of the PTC resistor. If an arc forms, there is also a risk of fire very high.

Die vorstehend beschriebenen Probleme treten auch bei Elektromagneten auf, die mit einem PTC-Widerstand verbunden und gemeinsam mit ihm in einem Gehäuse vergossen sind, siehe z.B. US-A-5 204 044.The problems described above also occur Electromagnets with a PTC resistor connected and together with him in one housing are potted, see e.g. US-A-5 204 044.

Aufgabe der Erfindung ist es, bei Verwenden der bekannten Vergußtechnik für einen Transformator eine Variante anzugeben, die ein sicheres Funktionieren des PTC-Widerstands gewährleistet.The object of the invention is when using the known Potting technology for a transformer to specify a variant that ensures safe functioning of the PTC resistance guaranteed.

Die Erfindung löst diese Aufgabe bei einer Gehäuseanordnung eingangs genannter Art durch eine separate Kammer zur Aufnahme des PTC-Widerstands. The invention solves this problem in a housing arrangement type mentioned by a separate chamber for receiving of the PTC resistor.

Da sich der PTC-Widerstand in einer separaten Kammer befindet, steht es nicht in direktem Kontakt mit der Vergußmasse. Insbesondere kommt er beim Herstellungsverfahren nicht mit der warmen Vergußmasse in Berührung. Kühlt die Vergußmasse ab, so können mechanische Spannungen nur an Wänden der Kammer auftreten, da nur diese mit der Vergußmasse in Berührung stehen. Durch die Kammer kann also wirksam verhindert werden, daß die mechanischen Spannungen beim Abkühlen der Vergußmasse den dotierten Keramikkörper des PTC-Widerstandes beschädigen.Since the PTC resistor is in a separate chamber, it is not in direct contact with the sealing compound. In particular he does not come with the manufacturing process warm casting compound in contact. If the casting compound cools down, so mechanical stresses can only occur on the walls of the chamber, since only these are in contact with the sealing compound. Through the chamber can thus effectively prevent the mechanical stresses when the casting compound cools, the doped ceramic body the PTC resistor.

Bei der Erfindung wird ein punktuelles Erhitzen der Verguß-masse verhindert, da der PTC-Widerstand nur über eine wärmeisolierende Luftschicht in der Kammer Wärme auf die Verguß-masse überträgt. Der PTC-Widerstand bleibt daher so lange funktionsfähig, bis die Stromzufuhr extern durch Abschalten unterbrochen wird.In the invention, a selective heating of the casting compound prevented because the PTC resistor only has a heat insulating Air layer in the chamber heat the potting compound transmits. The PTC resistor therefore stays that long functional until the power supply external by switching off is interrupted.

Die Kammer für den PTC-Widerstand ist in der Gehäuseanordnung separat enthalten, so daß die Erfindung weiterhin gewährleistet, daß ein Abnehmer des Transformators die Sicherheitsanforderungen z.B. aus Kostengründen nicht umgehen kann.The chamber for the PTC resistor is in the housing arrangement included separately, so that the invention further ensures that a customer of the transformer meets the safety requirements e.g. do not bypass for cost reasons can.

Eine Weiterbildung der Erfindung besteht darin, daß die Kammer eine an einer Außenseite der vergossenen Gehäuseanordnung liegende Öffnung hat. Durch die Öffnung an der Außenseite der Gehäuse anordnung ist die Kammer jederzeit zugänglich, so daß der PTC-Widerstand sowohl vor als auch nach dem Vergießen des Transformators eingebaut werden kann. Weiterhin läßt sich das Schutzelement beim oder nach Betrieb des Transformators von außen überprüfen und gegebenenfalls auswechseln.A further development of the invention is that the chamber one on an outside of the encapsulated housing arrangement has a lying opening. Through the opening on the outside of the Housing arrangement, the chamber is accessible at all times, so that the PTC resistance both before and after potting the Transformer can be installed. Furthermore, that Protective element during or after operation of the transformer check from outside and replace if necessary.

Es ist möglich, die Öffnung mit einem Verschlußelement zu verschließen, um Umwelteinflüsse wie Feuchtigkeit oder Staub vom Inneren der Kammer und damit vom PTC-Widerstand fernzuhalten. Das Verschlußelement verhindert auch ein ungewolltes Berühren des PTC-Widerstands und damit verbundene Gefahren für Personen. Dieses Verschlußelement kann ein mit einer Seitenwand der Gehäuseanordnung verbundener Klappdeckel oder ein auf die Kammer vorzugsweise in einem Paßsitz aufsetzbarer Deckel sein. Eine kostengünstige Variante besteht darin, daß die Öffnung an der Gehäuseanordnung so befestigt ist, daß beim Montieren der Gehäuseanordnung auf einem Träger, z.B. einer Leiterplatte, die Öffnung durch den Träger verschlossen wird.It is possible to close the opening with a closure element close to environmental influences such as moisture or dust keep away from the inside of the chamber and thus from the PTC resistor. The closure element also prevents unwanted touching of PTC resistance and related dangers for People. This closure element can be one with a side wall the housing arrangement connected hinged cover or a can be placed on the chamber preferably in a snug fit Cover. An inexpensive variant is that the opening is attached to the housing arrangement so that when mounting the housing arrangement on a carrier, e.g. a circuit board, the opening closed by the carrier becomes.

Ein Ausführungsbeispiel der Erfindung besteht darin, daß die Kammer in einem den Transformator aufnehmenden Gehäuse angeordnet ist. Da die Außenabmessungen der Gehäuse genormt sind und sich die Abnehmer auf diese Abmessungen eingestellt haben, wird durch das Anordnen der Kammer innerhalb des Gehäuses erreicht, daß sich die Außenabmessungen des Gehäuses nicht verändern und somit die Abnehmer auch den konstruktiven Aufbau ihrer Geräte nicht verändern müssen.An embodiment of the invention is that the Chamber arranged in a housing receiving the transformer is. Because the outer dimensions of the housing are standardized and the customers have adjusted to these dimensions, is achieved by placing the chamber inside the housing, that the outer dimensions of the housing do not change and thus the customers also the constructive structure do not have to change their devices.

Eine andere Weiterbildung der Erfindung besteht darin, daß die Kammer einstückig am Gehäuse angeformt ist. Durch diese Maßnahme kann die Kammer gleichzeitig mit dem Gehäuse hergestellt werden, so daß durch die Kammer nur geringe zusätzliche Produktionskosten entstehen.Another development of the invention is that the chamber is integrally formed on the housing. Through this The chamber can be made simultaneously with the housing be so that only little additional through the chamber Production costs arise.

Die Kammer kann auch als Einzelteil gefertigt werden und wird durch dem Fachmann bekannte Maßnahmen in einem späteren Arbeitsgang mit dem Gehäuse oder dem Transformator verbunden. Zu diesen Maßnahmen zählen Kleben, Schrauben, Nieten usw. Das Verbinden der Kammer wird durch das Verwenden von Rastelementen, insbesondere von Druckknöpfen und Klipsen, besonders einfach.The chamber can also be manufactured as a single part by measures known to the person skilled in the art in a later work step connected to the housing or the transformer. To These measures include gluing, screwing, riveting, etc. That Connecting the chamber is done by using locking elements, especially of push buttons and clips, particularly simple.

Ausführungsbeispiele der Erfindung werden im folgenden anhand der Zeichnungen erläutert. Dabei zeigen:

Figur 1a, b, c
ein erstes Gehäuse in einer Unter-, Vorder- und Seitenansicht,
Figur 2a, b, c
ein zweites Gehäuse in einer Unter-, Vorder- und Seitenansicht,
Figur 3
den Schnitt III-III des Gehäuses nach Figur 1b,
Figur 4
den Schnitt IV-IV des Gehäuses nach Figur 2b,
Figur 5a, b, c
eine erste Ausführungsform eines Verschlusses einer Kammer des Gehäuses nach Figur 1a, 1b bzw. 1c, und
Figur 6a, b, c
eine zweite Ausführungsform eines Verschlusses einer Kammer des Gehäuses nach Figur 1a, 1b bzw. 1c.
Embodiments of the invention are explained below with reference to the drawings. Show:
Figure 1a, b, c
a first housing in a bottom, front and side view,
Figure 2a, b, c
a second housing in a bottom, front and side view,
Figure 3
the section III-III of the housing of Figure 1b,
Figure 4
the section IV-IV of the housing according to Figure 2b,
Figure 5a, b, c
a first embodiment of a closure of a chamber of the housing according to Figure 1a, 1b and 1c, and
Figure 6a, b, c
a second embodiment of a closure of a chamber of the housing according to Figure 1a, 1b and 1c.

Die Figuren 1a, 1b und 1c zeigen ein erstes Gehäuse 10 in einer Unter-, Vorder- bzw. Seitenansicht. Die Unteransicht ist in Figur 1a dargestellt. Eine Kammer 12 ist an der linken Gehäusewand 14 einstückig im Inneren des Gehäuses 10 angeformt. Eine Aussparung 16 in einer Wand 18 der Kammer 12 ermöglicht das Verlegen einer elektrischen Leitung (vgl. Figur 3) zwischen dem Inneren der Kammer 12 und dem Inneren des Gehäuses 10.Figures 1a, 1b and 1c show a first housing 10 in one Bottom, front and side view. The bottom view is shown in Figure 1a. A chamber 12 is on the left housing wall 14 integrally formed in the interior of the housing 10. A recess 16 in a wall 18 of the chamber 12 enables the laying of an electrical line (see FIG. 3) between the interior of the chamber 12 and the interior of the housing 10th

Unter der Unteransicht ist in Figur 1b die Vorderansicht des Gehäuses 10 dargestellt. Eine weitere Aussparung 20 in der Kammer 12 ermöglicht das Verlegen einer weiteren Leitung (vgl. Figur 3) zwischen der Kammer 12 und dem Inneren des Gehäuses 10. Eine Darstellung des Schnittes III-III wird anhand der Figur 3 näher erläutert. Figur 1c zeigt eine Seitenansicht des Gehäuses 10. Die Ausdehnung der Kammer 12 in ihrer Längsrichtung und ihrer Höhe, sowie ihre Lage im Gehäuse 10 werden in Figur 1c deutlich.Under the bottom view in Figure 1b is the front view of the Housing 10 shown. Another recess 20 in the Chamber 12 allows another line to be laid (see Figure 3) between the chamber 12 and the interior of the housing 10. A representation of section III-III is based on of Figure 3 explained in more detail. Figure 1c shows a side view of the housing 10. The expansion of the chamber 12 in its Longitudinal direction and its height, as well as its position in the housing 10 are clear in Figure 1c.

Die Figuren 2a, b und c zeigen ein zweites Gehäuse 30 in einer Unter-, Vorder- bzw. einer Seitenansicht. In Figur 2a ist die Unteransicht des Gehäuses 30 dargestellt. Eine Kammer 32 ist einstückig außerhalb des Gehäuses 30 an einer Wand 34 angeformt. Zwei Aussparungen 36 und 38 in der Gehäusewand 34 dienen zur Aufnahme elektrischer Leitungen (vgl. Figur 4) zwischen der Kammer 32 und dem Inneren des Gehäuses 30.Figures 2a, b and c show a second housing 30 in one Bottom, front and side view. In Figure 2a the bottom view of the housing 30 is shown. A chamber 32 is integrally formed on the wall 34 outside the housing 30. Two cutouts 36 and 38 in the housing wall 34 are used to hold electrical cables (see Figure 4) between chamber 32 and the interior of housing 30.

Unter der Unteransicht befindet sich in Figur 2b die Vorderansicht des Gehäuses 30. Eine Darstellung des Schnittes IV-IV wird anhand der Figur 4 weiter unten erläutert. Figur 2c zeigt die Seitenansicht auf das Gehäuse 30, die die Lage der Kammer 32 bezüglich des Gehäuses 30 deutlich macht.The front view is located below the bottom view in FIG. 2b the housing 30. A representation of the section IV-IV is explained below with reference to FIG. 4. Figure 2c shows the side view of the housing 30, the location of the Chamber 32 makes clear with respect to the housing 30.

Figur 3 zeigt das Gehäuse 10 als Schnitt III-III aus Figur 1b. Das Innere des Gehäuses 10 ist mit einer Vergußmasse 50 ausgefüllt. Die Wände der Kammer 12 halten die Vergußmasse 50 von einem PTC-Widerstand 52 ab. Zuleitungen 54 und 56 des PTC-Widerstandes sind über Verbindungsstellen 58 und 60 mit Leitungen 42 und 44 zu einer im Inneren der Vergußmasse 30 enthaltenen elektronischen Baueinheit verbunden. Die Leitung 62 bzw. 64 verläuft dabei durch die Aussparungen 16 bzw. 20.Figure 3 shows the housing 10 as section III-III of Figure 1b. The interior of the housing 10 has a potting compound 50 filled out. The walls of the chamber 12 hold the sealing compound 50 from a PTC resistor 52. Leads 54 and 56 of the PTC resistors are connected via connection points 58 and 60 Lines 42 and 44 to one inside the potting compound 30 contained electronic unit connected. The administration 62 or 64 runs through the cutouts 16 or 20.

Figur 4 zeigt das Gehäuse 30 als Schnitt IV-IV entsprechend Figur 2b. Das Innere des Gehäuses 30, das auch einen nicht dargestellten Transformator enthält, ist mit der Vergußmasse 70 gefüllt. Die Gehäusewand 34 hält die Vergußmasse 50 von einem PTC-Widerstand 72 im Inneren der Kammer 32 ab. Eine Zuleitung 74 ist über eine Verbindungsstelle 76 mit einer Leitung 78 verbunden, die durch die Aussparung 36 von der Kammer 32 ins Innere des Gehäuses 30 verläuft. Die Leitung 78 und eine weitere nicht dargestellte Leitung verbinden den PTC-Widerstand 72 mit dem in der Vergußmasse 70 eingegossenen Transformator. Figure 4 shows the housing 30 as section IV-IV accordingly Figure 2b. The inside of the housing 30, which is also not one contains the transformer shown is with the sealing compound 70 filled. The housing wall 34 holds the sealing compound 50 from a PTC resistor 72 inside the chamber 32. A supply line 74 is via a junction 76 with a line 78 connected by the recess 36 from the chamber 32 extends inside the housing 30. Line 78 and another line, not shown, connect the PTC resistor 72 with that cast in the sealing compound 70 Transformer.

Die Figuren 5a, b und c zeigen eine erste Ausführungsform eines Verschlusses einer anstelle der Kammer 12 am Gehäuse 10 angeformten Kammer 12' mit einem Verschlußdeckel 90. Die Kammer 12' hat verstärkte Wände. Zwischen einer inneren Wand 92 und einer äußeren Wand 94 der Kammer 12' befindet sich eine Nut 96.Figures 5a, b and c show a first embodiment of a Closure one instead of the chamber 12 on the housing 10 molded chamber 12 'with a cap 90. The chamber 12 'has reinforced walls. Between an inner wall 92 and an outer wall 94 of chamber 12 'is one Groove 96.

Figur 5b zeigt den Schnitt V-V der Kammer 12' nach Figur 5a. Die Tiefe der Nut 96 kann Figur 5b entnommen werden. Sie stimmt mit der Höhe des Verschlußdeckels 90 entsprechend Figur 5c überein. Der Verschlußdeckel 90 ist so ausgebildet, daß er unter Druck in die Nut 96 eingepreßt wird. Aufgrund eines Paßsitzes entsteht eine kraftschlüssige Verbindung zwischen Verschlußdeckel 90 und Kammer 12'. Damit kann die Kammer 12' nach dem Einsetzen des PTC-Widerstandes 52 verschlossen werden, so daß der PTC-Widerstand vor Umwelteinflüssen und ungewollter Berührung geschützt ist.Figure 5b shows the section V-V of the chamber 12 'of Figure 5a. The depth of the groove 96 can be seen in FIG. 5b. she agrees with the height of the cap 90 according to the figure 5c match. The closure cover 90 is designed that it is pressed into the groove 96 under pressure. Because of a snug fit creates a non-positive connection between Cap 90 and chamber 12 '. So that the chamber 12 'closed after inserting the PTC resistor 52 be so that the PTC resistance from environmental influences and is protected against unwanted touch.

Die Figuren 6a, b und c zeigen eine zweite Ausführungsform eines Verschlusses einer anstelle der Kammer 12 am Gehäuse 10 angeformten Kammer 12" mit einem Verschlußdeckel 100. In den Ecken der Kammer 12" befindet sich je ein angegossenes Formelement 102 bis 108 zur Aufnahme jeweils einer axialen Bohrung 110 bis 116.Figures 6a, b and c show a second embodiment a closure instead of the chamber 12 on the housing 10 molded chamber 12 "with a cap 100. In the Corners of the chamber 12 "each have a molded molding 102 to 108 for receiving one axial bore each 110 to 116.

Figur 6b zeigt den Schnitt VI-VI der Kammer 12" nach Figur 6a. In Figur 6b ist die Tiefe der Bohrungen 114 und 116 zu erkennen, die auch der Tiefe der Bohrungen 110 und 112 entspricht. Die Öffnung der Kammer 12" ist angeschrägt. Der in Figur 6c gezeigte Verschlußdeckel 100 ist ebenfalls in seinen Randbereichen angeschrägt, so daß er die Kammer 12" optimal verschließen kann. Zum Verschließen befinden sich in den Eckbereichen des Verschlußdeckels 100 Stifte, von denen in Figur 6c die Stifte 118 und 120 dargestellt sind. Die Länge der Stifte 118 und 120 sowie ihr Durchmesser stimmt mit dem Durchmesser und der Länge der zugehörigen Bohrungen 114 bzw. 116 annähernd überein. Das Verschließen der Kammer 12" erfolgt durch Einsetzen des Verschlußdeckels 100 unter Druck in die Öffnung der Kammer 12". Aufgrund eines Paßsitzes wird der Verschlußdeckel 100 von der Kammer 12" festgehalten. Damit ist ein sicheres Verschließen und auch ein Öffnen der Kammer 12" jederzeit möglich.Figure 6b shows the section VI-VI of the chamber 12 "according to Figure 6a. In Figure 6b the depth of the holes 114 and 116 is too recognize that also corresponds to the depth of the bores 110 and 112. The opening of the chamber 12 "is chamfered. The in Figure 6c shown cap 100 is also in its Edge areas chamfered so that it optimally the chamber 12 " can close. There are locks in the corner areas of the cap 100 pins, of which in figure 6c pins 118 and 120 are shown. The length of the Pins 118 and 120 and their diameter match that Diameter and length of the associated bores 114 and 116 roughly match. The chamber 12 "is closed by inserting the cap 100 under pressure in the opening of the chamber 12 ". Due to a snug fit the Closure cover 100 held by the chamber 12 " is a secure closing and also an opening of the chamber 12 "possible at any time.

Claims (14)

  1. Casing arrangement for containing a transformer in a potted manner, which transformer is connected to a PTC thermistor (52, 72), characterized by a separate chamber (12, 12', 12", 32) for containing the PTC thermistor (52, 72).
  2. Casing arrangement according to Claim 1, characterized in that the chamber (12, 12', 12", 32) has an opening located on an exterior side of the casing arrangement.
  3. Casing arrangement according to Claim 2, characterized in that the opening is closed off by a closure element (90, 100).
  4. Casing arrangement according to Claim 3, characterized in that the closure element is formed by a support on which the casing arrangement is mounted.
  5. Casing arrangement according to Claim 3, characterized in that the closure element (90, 100) is connected in a hinged manner to a side wall of the casing arrangement.
  6. Casing arrangement according to Claim 3, characterized in that the closure element (90, 100) is connected to the opening by a snug fit.
  7. Casing arrangement according to Claim 6, characterized in that the snug fit is present between a groove (96) along the opening and a projection, which engages in the groove (96), on a cover (90) matched to the opening.
  8. Casing arrangement according to Claim 6, characterized in that the snug fit is present between holes (110 to 116) on shaped elements (102 to 108) in corners of the chamber (12") and pins (118, 120), which engage in the hole (110 to 116), on a cover (100) which closes off the opening.
  9. Casing arrangement according to one of the preceding claims, characterized in that the chamber (12, 12', 12") is arranged in a casing (10) containing the structural unit.
  10. Casing arrangement according to one of Claims 1 to 8, characterized in that the chamber (32) is arranged outside a casing (30) containing the structural unit.
  11. Casing arrangement according to one of the preceding claims, characterized in that the chamber (12, 12', 12", 32) has cutouts (16, 20 and 36, 38, respectively) for lines (62, 64 and 78, respectively) which connect the transformer and the PTC thermistor (52, 72).
  12. Casing arrangement according to one of Claims 8 to 10, characterized in that the chamber (12, 12', 12", 32) is fixed on the casing (10 or 30, respectively).
  13. Casing arrangement according to Claim 11, characterized in that the chamber (12, 12', 12", 32) is integrally formed on the casing (10 or 30, respectively).
  14. Casing arrangement according to Claim 11, characterized in that the chamber is fixed by a latching element on the casing (10, 30).
EP95118991A 1995-12-01 1995-12-01 Casing arrangement for containing a transformer Expired - Lifetime EP0777239B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT95118991T ATE193614T1 (en) 1995-12-01 1995-12-01 HOUSING ARRANGEMENT FOR CASTING A TRANSFORMER
EP95118991A EP0777239B1 (en) 1995-12-01 1995-12-01 Casing arrangement for containing a transformer
DE59508434T DE59508434D1 (en) 1995-12-01 1995-12-01 Housing arrangement for encapsulating a transformer
PT95118991T PT777239E (en) 1995-12-01 1995-12-01 CONFIGURATION OF THE BOX FOR INCORPORATION IN THE MOLDING BY FUNDING OF A TRANSFORMER
ES95118991T ES2149916T3 (en) 1995-12-01 1995-12-01 BOX INTENDED TO CONTAIN A TRANSFORMER.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95118991A EP0777239B1 (en) 1995-12-01 1995-12-01 Casing arrangement for containing a transformer

Publications (2)

Publication Number Publication Date
EP0777239A1 EP0777239A1 (en) 1997-06-04
EP0777239B1 true EP0777239B1 (en) 2000-05-31

Family

ID=8219861

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95118991A Expired - Lifetime EP0777239B1 (en) 1995-12-01 1995-12-01 Casing arrangement for containing a transformer

Country Status (5)

Country Link
EP (1) EP0777239B1 (en)
AT (1) ATE193614T1 (en)
DE (1) DE59508434D1 (en)
ES (1) ES2149916T3 (en)
PT (1) PT777239E (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2792110B1 (en) * 1999-04-06 2002-02-08 Star Light TRANSFORMER FOR HALOGEN LAMP

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE398280B (en) * 1975-11-20 1977-12-12 Eldon Ab UNLIMITED SHORT CIRCUIT ELECTRIC TRANSFORMER
JPS56153720A (en) * 1980-04-30 1981-11-27 Hitachi Lighting Ltd Molded stabilizer provided with protective device
JPS60213013A (en) * 1984-04-09 1985-10-25 Matsushita Electric Ind Co Ltd Ac adapter
US5204044A (en) * 1989-03-28 1993-04-20 Aisan Kogyo Kabushiki Kaisha Method of asembling a DC solenoid with a thermistor
US5168422A (en) * 1989-09-08 1992-12-01 Allanson, Division Of Jannock Limited Self-enclosed neon transformer
GB2236216B (en) * 1989-09-12 1994-01-19 Luminaire Dev Ltd Transformer and connector assembly

Also Published As

Publication number Publication date
ATE193614T1 (en) 2000-06-15
ES2149916T3 (en) 2000-11-16
PT777239E (en) 2000-11-30
DE59508434D1 (en) 2000-07-06
EP0777239A1 (en) 1997-06-04

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