EP0777239B1 - Boítier destiné à contenir un transformateur - Google Patents

Boítier destiné à contenir un transformateur Download PDF

Info

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
Other languages
German (de)
English (en)
Other versions
EP0777239A1 (fr
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 ES95118991T priority Critical patent/ES2149916T3/es
Priority to EP95118991A priority patent/EP0777239B1/fr
Priority to PT95118991T priority patent/PT777239E/pt
Priority to DE59508434T priority patent/DE59508434D1/de
Priority to AT95118991T priority patent/ATE193614T1/de
Publication of EP0777239A1 publication Critical patent/EP0777239A1/fr
Application granted granted Critical
Publication of EP0777239B1 publication Critical patent/EP0777239B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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.

Landscapes

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

Claims (14)

  1. Agencement de boítier pour loger hermétiquement un transformateur qui est relié à une thermistance à coefficient de température positif (52, 72), caractérisé par une chambre séparée (12, 12', 12", 32) pour loger la thermistance à coefficient de température positif (52, 72).
  2. Agencement de boítier selon la revendication 1, caractérisé en ce que la chambre (12, 12', 12", 32) possède une ouverture ménagée dans un côté extérieur de l'agencement de boítier.
  3. Agencement de boítier selon la revendication 2, caractérisé en ce que l'ouverture est fermée par un élément de fermeture (90, 100).
  4. Agencement de boítier selon la revendication 3, caractérisé en ce que l'élément de fermeture est constitué par un support sur lequel est monté l'agencement de boítier.
  5. Agencement de boítier selon la revendication 3, caractérisé en ce que l'élément de fermeture (90, 100) est relié de façon articulée à une paroi latérale de l'agencement de boítier.
  6. Agencement de boítier selon la revendication 3, caractérisé en ce que l'élément de fermeture (90, 100) est relié à l'ouverture avec un ajustement fin.
  7. Agencement de boítier selon la revendication 6, caractérisé en ce que l'ajustement fin est prévu entre une gorge (96) ménagée le long de l'ouverture, et une saillie s'engageant dans la gorge (96) et disposée sur un couvercle (90) adapté à l'ouverture.
  8. Agencement de boítier selon la revendication 6, caractérisé en ce que l'ajustement fin est prévu entre des alésages (110 à 116) ménagés dans des éléments moulés (102 à 108) situés aux coins de la chambre (12"), et des ergots (118, 120) s'engageant dans les alésages (110 à 116) et disposés sur un couvercle (100) fermant l'ouverture.
  9. Agencement de boítier selon l'une des revendications précédentes, caractérisé en ce que la chambre (12, 12', 12") est agencée dans un boítier (10) logeant l'unité modulaire.
  10. Agencement de boítier selon l'une des revendications 1 à 8, caractérisé en ce que la chambre (32) est agencée à l'extérieur d'un boítier (30) logeant l'unité modulaire.
  11. Agencement de boítier selon l'une des revendications précédentes, caractérisé en ce que la chambre (12, 12', 12", 32) comporte des orifices (16, 20 ou 36, 38) destinés à des conducteurs (62, 64 ou 78) reliant le transformateur et la thermistance à coefficient de température positif (52, 72).
  12. Agencement de boítier selon l'une des revendications 8 à 10, caractérisé en ce que la chambre (12, 12', 12", 32) est fixée au boítier (10 ou 30).
  13. Agencement de boítier selon la revendication 11, caractérisé en ce que la chambre (12, 12', 12", 32) est conformée en étant venue de matière avec le boítier (10 ou 30).
  14. Agencement de boítier selon la revendication 11, caractérisé en ce que la chambre est fixée au boítier (10,30) au moyen d'un élément d'encliquetage.
EP95118991A 1995-12-01 1995-12-01 Boítier destiné à contenir un transformateur Expired - Lifetime EP0777239B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES95118991T ES2149916T3 (es) 1995-12-01 1995-12-01 Caja destinada para contener un transformador.
EP95118991A EP0777239B1 (fr) 1995-12-01 1995-12-01 Boítier destiné à contenir un transformateur
PT95118991T PT777239E (pt) 1995-12-01 1995-12-01 Configuracao da caixa para incorperacao na moldagem por fundicao de um transformador
DE59508434T DE59508434D1 (de) 1995-12-01 1995-12-01 Gehäuseanordnung zur vergossenen Aufnahme eines Transformators
AT95118991T ATE193614T1 (de) 1995-12-01 1995-12-01 Gehäuseanordnung zur vergossenen aufnahme eines transformators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95118991A EP0777239B1 (fr) 1995-12-01 1995-12-01 Boítier destiné à contenir un transformateur

Publications (2)

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

Family

ID=8219861

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95118991A Expired - Lifetime EP0777239B1 (fr) 1995-12-01 1995-12-01 Boítier destiné à contenir un transformateur

Country Status (5)

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2792110B1 (fr) * 1999-04-06 2002-02-08 Star Light Transformateur pour lampe halogene

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE398280B (sv) * 1975-11-20 1977-12-12 Eldon Ab Obegrensat kortslutningsseker elektrisk transformator
JPS56153720A (en) * 1980-04-30 1981-11-27 Hitachi Lighting Ltd Molded stabilizer provided with protective device
JPS60213013A (ja) * 1984-04-09 1985-10-25 Matsushita Electric Ind Co Ltd Ａｃアダプタ−
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
EP0777239A1 (fr) 1997-06-04
ES2149916T3 (es) 2000-11-16
PT777239E (pt) 2000-11-30
ATE193614T1 (de) 2000-06-15
DE59508434D1 (de) 2000-07-06

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