EP2065904A1 - Composant électrique, notamment un transformateur ou une bobine de choc - Google Patents

Composant électrique, notamment un transformateur ou une bobine de choc Download PDF

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Publication number
EP2065904A1
EP2065904A1 EP08169119A EP08169119A EP2065904A1 EP 2065904 A1 EP2065904 A1 EP 2065904A1 EP 08169119 A EP08169119 A EP 08169119A EP 08169119 A EP08169119 A EP 08169119A EP 2065904 A1 EP2065904 A1 EP 2065904A1
Authority
EP
European Patent Office
Prior art keywords
core
electrical component
openings
glass fiber
component according
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Withdrawn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
EP08169119A
Other languages
German (de)
English (en)
Inventor
Marc Bröske
Dieter Heller
Stefan Meinke
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.)
MDEXX GMBH
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP2065904A1 publication Critical patent/EP2065904A1/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Withdrawn legal-status Critical Current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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0233—Manufacturing of magnetic circuits made from sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating

Definitions

  • the invention relates to an electrical component, in particular a transformer or a choke, according to the preamble of claim 1.
  • Electric transformers and chokes are known and commonly referred to as winding goods. They may have a ferromagnetic core with a plurality of legs, which carry one or more coils or windings.
  • the core often consists of parallel abutting ferromagnetic core sheets, which form a laminated core. With shaking and shock loads, it can lead to the displacement of individual core sheets in the legs. This can go so far that a core plate bridges a leg air gap and it can come as a result of the magnetic flux due to the then very large magnetic induction to local overheating. Also loose core sheets can be destroyed by vibrations occurring. Problems also arise if the core core height decreases due to distributed air gaps and / or grain-oriented sheets of higher quality are used.
  • the laminated cores are held together, for example by means of bandages, which bear against the outside of the laminated core and can be designed as adhesive tapes.
  • the required air gap shim for example, is chosen to be somewhat larger, depending on the core structure, so as to prevent individual sheets from slipping.
  • the sheets of the laminated core can also be connected to each other by a running over all sheets weld.
  • the use of rivets is known to hold the core package together. As both a Weld seam and a rivet have significantly poorer magnetic properties, it usually leads to a significant deterioration of the electromagnetic properties. In particular, additional losses occur due to the formation of eddy currents. This can lead to local overheating at higher frequencies, which in the worst case can be associated with destruction.
  • the object of the invention is to propose laminated cores in which - no matter under which circumstances - no displacement of individual sheets can occur, without the deterioration of the magnetic properties of the core sheets and thus of the laminated core.
  • Next should not be installed by additional holding and securing devices a surrounding the core cooling air duct.
  • the laminated core has at least two openings extending transversely through the sheets, into each of which a rod-shaped non-magnetic element corresponding to the opening cross-section is inserted, which is firmly connected to the laminated core by pushing apart at least one of its ends. In this way, all sheets are secured against displacement.
  • the opening are cylindrical openings and the rod-shaped elements are cylinder rods.
  • the cylinder rods are glass fiber rods.
  • the glass fiber rods are formed from two semi-circular cylinders adjacent to one another with their flat sides.
  • a high security against displacement is achieved when the openings are through-holes and the two ends of the glass fiber rod located in the passage opening for clamping by means of a pushed between the half-round cylinder clamping piece are pressed apart.
  • FIG. 1 shows a laminated core 1 of an electrical component, which may be a transformer or a choke.
  • the electrical component comprises a ferromagnetic core, which carries at least one coil, so that a magnetic flux is generated during a current flow through the coil in the core (not shown).
  • the core is composed of at least one laminated core 1, which consists of ferromagnetic sheets 2, which lie with their flat side together.
  • the sheets 2 are in the FIG. 1 indicated by thin lines only. How to get in FIG. 1 recognizes, the relatively thin sheets have the shape of a rectangle.
  • the sheets 2 are held together by two bandages 3, which circumscribe the laminated core 1 on the outside.
  • the bandages 3 may be an adhesive tape.
  • On the two outer sides of the laminated core 1 is in each case a non-ferromagnetic sheet 4, virtually as a cover made of aluminum.
  • the sheets 3 and 4 are provided with two circular passage openings extending transversely through the sheets, into which a cylindrical glass fiber rod 5a is inserted as a rod-shaped non-magnetic element 5. As the FIG.
  • each glass fiber rod 5a consists of two semi-circular cylinders 5b abutting each other with their flat side, which are braced by means of a clamping piece 6 which has been pushed between the two half-round cylinders 5b. In this way, belonging to a glass fiber rod 5a half-round cylinder 5b are pressed apart and against the sheets 3 and fixed so by tightening the glass fiber rod 5a.
  • FIG. 2 shows the laminated core 1 according to FIG. 1 similar to an exploded view without the bandages 3 during the insertion of the glass fiber rod 5a.
  • the two half-round cylinders 5b of the glass fiber rod 5a are shown slightly displaced relative to one another in the longitudinal direction.
  • FIG. 3 A cross section through the laminated core 1 is in FIG. 3 to see.
  • the sectional plane extends through the longitudinal axis of the glass fiber rod 5a.
  • the clamping piece 6 is already inserted on the right side, while it is on the left side in front of the laminated core 1 (before insertion) located.
  • the clamping piece 6 is wedge-shaped at one end in order to insert it better.
  • the clamping pieces 6 are inserted here only at the ends of the glass fiber rods 5a, but can also extend over the entire length of the glass fiber rod 5a.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Laminated Bodies (AREA)
EP08169119A 2007-11-30 2008-11-14 Composant électrique, notamment un transformateur ou une bobine de choc Withdrawn EP2065904A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710058212 DE102007058212A1 (de) 2007-11-30 2007-11-30 Elektrisches Bauteil, insbesondere Transformator oder Drossel

Publications (1)

Publication Number Publication Date
EP2065904A1 true EP2065904A1 (fr) 2009-06-03

Family

ID=40344845

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08169119A Withdrawn EP2065904A1 (fr) 2007-11-30 2008-11-14 Composant électrique, notamment un transformateur ou une bobine de choc

Country Status (3)

Country Link
EP (1) EP2065904A1 (fr)
CN (1) CN101552100B (fr)
DE (1) DE102007058212A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017222248A1 (de) * 2017-12-08 2019-06-13 Zf Friedrichshafen Ag Drossel mit Stromsensor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB553909A (en) * 1941-11-07 1943-06-10 Horace Clifford Westcott Improvements in and relating to clamping the laminations of electric transformers
US3007124A (en) * 1957-03-21 1961-10-31 Ferranti Ltd Laminated magnetic cores for static electrical apparatus
GB1326766A (en) * 1969-09-19 1973-08-15 Gen Electric Laminated magnetic cores for electric induction apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87210805U (zh) * 1987-07-21 1988-10-26 太原变压器厂 铁心不叠上铁轭定位装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB553909A (en) * 1941-11-07 1943-06-10 Horace Clifford Westcott Improvements in and relating to clamping the laminations of electric transformers
US3007124A (en) * 1957-03-21 1961-10-31 Ferranti Ltd Laminated magnetic cores for static electrical apparatus
GB1326766A (en) * 1969-09-19 1973-08-15 Gen Electric Laminated magnetic cores for electric induction apparatus

Also Published As

Publication number Publication date
CN101552100B (zh) 2012-08-29
CN101552100A (zh) 2009-10-07
DE102007058212A1 (de) 2009-06-04

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