EP0131222A1 - Inductance permettant d'obtenir des valeurs d'induction magnétique élevées - Google Patents

Inductance permettant d'obtenir des valeurs d'induction magnétique élevées Download PDF

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Publication number
EP0131222A1
EP0131222A1 EP84107553A EP84107553A EP0131222A1 EP 0131222 A1 EP0131222 A1 EP 0131222A1 EP 84107553 A EP84107553 A EP 84107553A EP 84107553 A EP84107553 A EP 84107553A EP 0131222 A1 EP0131222 A1 EP 0131222A1
Authority
EP
European Patent Office
Prior art keywords
core
choke
adapter
socket
discharge lamp
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.)
Withdrawn
Application number
EP84107553A
Other languages
German (de)
English (en)
Inventor
Frithjof Blum
Erhard Dipl.-Phys. Rasch
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0131222A1 publication Critical patent/EP0131222A1/fr
Withdrawn legal-status Critical Current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
    • H01F37/00—Fixed inductances not covered by group H01F17/00

Definitions

  • the invention relates to a choke with a ferromagnetic core and an insulated copper winding for operation with 50 or 60 Hz mains frequency and for generating flux densities greater than 0.8 Tesla.
  • the chokes with ferromagnetic core material known from the literature for producing large flux densities usually have a U-shaped or E-shaped core, which is closed by an I-shaped yoke. Chokes of this type have unfavorable construction data because they take up a lot of space and have large power losses. In this case, the iron path of the core is relatively long, so that a lot of energy is required for the magnetization of the ferroma grit. Such a choke has a magnetization curve with a large saturation range.
  • chokes designed in this way usually have very large end windings which, since they are located outside the core, have no magnetic effect and thus likewise lead to high power losses of the choke.
  • the copper wire expenditure for the formation of such winding heads can in this case amount to 30 to 40% of the total wire expenditure required for the choke.
  • the aim of the invention is to create a throttle that is as compact as possible, with small losses and with the least material expenditure, with which flux densities greater than 0.8 Tesla can be achieved in the case of mains operation.
  • the choke should be usable as a ballast for low-pressure discharge lamps, in particular those with compact dimensions, and fit into the base or into the adapter for such a lamp.
  • the choke with the features mentioned in the preamble of the main claim is characterized according to the invention in that the core is designed as an annular hollow cylinder, the entire copper winding being located in the cavity of the core.
  • a core designed in this way creates a very compact choke with a short iron path, which has a relatively straight-line magnetization curve.
  • the choke has no winding heads, so that the power losses caused by the winding can be reduced from the otherwise usual 30 to 50% to less than 5%.
  • the circle has proven to be the cheapest form for the ring-shaped core of the choke, since such a form is most versatile. However, it is also possible to give the ring the shape of an oval, a rectangle or a polygon - depending on the required for the possible installation - to give, without thereby changing the characteristics of the throttle significantly.
  • the ring-shaped hollow cylinder of the core advantageously has a rectangular cross section, which - as shown in the second exemplary embodiment - results in a very simple production method for the core. Due to the right-angled boundaries of the core, there are also no dead spaces during installation that remain unused.
  • the core has one or more air slots that extend over the entire ring shape and extend from the cavity located in the center of the core to the outside. These air slots ensure extensive linearization of the magnetization characteristic, so that the characteristic only reaches the saturation range at high field strengths.
  • the annular core has a separation gap, so that the ring shape is not completely closed. This largely suppresses eddy currents in the core and thus reduces the losses of the choke.
  • the separation gap also serves to lead the ends of the copper winding out of the cavity of the core.
  • the choke is intended in particular as a ballast for a compact low-pressure discharge lamp and is mounted in the base of such a lamp.
  • an adapter the latter having a socket for receiving a lamp base and a socket for inserting the adapter into a standardized luminaire socket.
  • the choke Due to its ring shape, the choke can be used very well in the adapter so that it surrounds the socket for receiving a lamp base in a ring. This space-saving attachment also makes it possible to use the throttle as a supporting part of the adapter on which the other components are suspended.
  • the choke only needs to be protected from contact by e.g. thin-walled insulation plastic layer.
  • FIG. 1a shows a top view
  • FIG. 1b shows a section through an exemplary embodiment of the throttle according to the invention.
  • the core 1 is composed of U-shaped sheet-metal pieces 2, 3 with a thickness of 0.5 mm, two sheet-metal pieces 2, 3 lying opposite each other with their openings and forming an air slot 7 4 of 0.3 mm, which is provided with a press chip - Plastic mass is filled.
  • the pairs of sheet metal pieces 2, 3 are arranged in the form of a circle which is not completely closed and has a separation gap 5 of 2 to 4 mm in width.
  • FIG. 2a shows a top view
  • FIG. 2b shows a section through a further exemplary embodiment of the throttle according to the invention, the manufacture of which is simplified compared to the exemplary embodiment from FIG.
  • the circular core 10 with a rectangular cross section is composed here of the side plates 11, 12 with a thickness of 0.5 mm - 6 plates on the outside and 7 plates on the inside, so that approximately the same amount of magnetization results - as well as on the ring plates 13, 14 above and below - 7 sheets each - together. Between the innermost annular plates 13, 14 above and below and the side plates 11, 12 there are air slots 15, 16 of 0.12 mm each, which are filled with a pressboard plastic compound.
  • All side or circular ring plates 11, 12, 13, 14 are not completely closed, but form an annular core with a separation gap 17 of 2 to 4 mm in width.
  • the cavity 18 formed by the side or annular plates 11, 12, 13, 14 and which is designed with an insulating plastic film (not shown) there is the copper winding 19, the ends 20, 21 of which are led out through the separation gap 17.
  • the core has an outer diameter of 71 mm, an inner diameter of 44 mm and a height of 28 mm.
  • a choke according to the second embodiment has a flux density of 1.1 Tesla at 180 V operating voltage and a current of 200 m A.
  • the power loss of the choke amounts to about 4.5 V.
  • the flux density of the first exemplary embodiment is somewhat lower with the same operating voltage and the same current and has a higher power loss due to the numerous air slots on the outer radius due to the structure.
  • FIG. 3 shows the base 22 of a compact low-pressure discharge lamp.
  • the throttle 23 surrounds the pinch 24 of the outer vessel 25 in a circle and is electrically connected to the screw thread 29 of the base 22 via the two electrodes 26, 27 and the starter 28.
  • the discharge runs from the electrode 26 through the curved - not shown - tubular inner vessel 30, the outer vessel 25 and the bent - not shown - tubular inner vessel 31 back to the electrode 27.
  • FIG. 4 shows an adapter 32 for connecting a compact low-pressure discharge lamp to a standard incandescent lamp holder.
  • the housing 32 of the adapter has a socket 33 for receiving the lamp base and a screw base 34 for inserting the adapter into a standard incandescent lamp holder.
  • the throttle 35 in the housing 32 surrounds the socket 33 in a circle and at the same time represents the support member for the entire adapter.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP84107553A 1983-07-06 1984-06-29 Inductance permettant d'obtenir des valeurs d'induction magnétique élevées Withdrawn EP0131222A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3324387 1983-07-06
DE19833324387 DE3324387A1 (de) 1983-07-06 1983-07-06 Drossel zur erzeugung hoher flussdichten

Publications (1)

Publication Number Publication Date
EP0131222A1 true EP0131222A1 (fr) 1985-01-16

Family

ID=6203313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84107553A Withdrawn EP0131222A1 (fr) 1983-07-06 1984-06-29 Inductance permettant d'obtenir des valeurs d'induction magnétique élevées

Country Status (3)

Country Link
EP (1) EP0131222A1 (fr)
DE (1) DE3324387A1 (fr)
FI (1) FI842493A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3343914C2 (de) * 1983-12-05 1986-04-03 May & Christe Gmbh, Transformatorenwerke, 6370 Oberursel Adapter für Gasentladungslampen bzw. Niederspannungslampen
DE102009031967B3 (de) * 2009-07-06 2011-05-12 Nkl Gmbh Adapter für Kompaktleuchtstofflampen oder Leuchtdiodenlampen mit integriertem Vorschaltgerät

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE949368C (de) * 1953-12-21 1956-09-20 Philips Nv Verfahren zur Herstellung eines lamellierten ferromagnetischen Kerns
US2878425A (en) * 1957-09-26 1959-03-17 Kudoh Keizo Ballast for fluorescent lamp
DE2512871A1 (de) * 1974-05-03 1975-11-13 Arjona Vallet F Aus einzelblechen zusammengesetzter ringkern

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE949368C (de) * 1953-12-21 1956-09-20 Philips Nv Verfahren zur Herstellung eines lamellierten ferromagnetischen Kerns
US2878425A (en) * 1957-09-26 1959-03-17 Kudoh Keizo Ballast for fluorescent lamp
DE2512871A1 (de) * 1974-05-03 1975-11-13 Arjona Vallet F Aus einzelblechen zusammengesetzter ringkern

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SIEMENS ZEITSCHRIFT, Band 44, Nr. 3, M{rz 1970, Seiten 138-141; H.-K. BODE et al.: "Sch}ttdrossel mit Aluminiumwicklung" *

Also Published As

Publication number Publication date
DE3324387A1 (de) 1985-01-17
FI842493A0 (fi) 1984-06-20
FI842493A (fi) 1985-01-07

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19850917

RIN1 Information on inventor provided before grant (corrected)

Inventor name: RASCH, ERHARD, DIPL.-PHYS.

Inventor name: BLUM, FRITHJOF