EP0104585B1 - Topfkernspulentransformator - Google Patents

Topfkernspulentransformator Download PDF

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Publication number
EP0104585B1
EP0104585B1 EP19830109299 EP83109299A EP0104585B1 EP 0104585 B1 EP0104585 B1 EP 0104585B1 EP 19830109299 EP19830109299 EP 19830109299 EP 83109299 A EP83109299 A EP 83109299A EP 0104585 B1 EP0104585 B1 EP 0104585B1
Authority
EP
European Patent Office
Prior art keywords
pedestals
rims
transformer according
pedestal
winding
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
Application number
EP19830109299
Other languages
English (en)
French (fr)
Other versions
EP0104585A1 (de
Inventor
Charles S. Walker
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.)
Honeywell Inc
Original Assignee
Honeywell Inc
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 Honeywell Inc filed Critical Honeywell Inc
Publication of EP0104585A1 publication Critical patent/EP0104585A1/de
Application granted granted Critical
Publication of EP0104585B1 publication Critical patent/EP0104585B1/de
Expired 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
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/08—High-leakage transformers or inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H01F17/04—Fixed inductances of the signal type with magnetic core
    • H01F17/043—Fixed inductances of the signal type with magnetic core with two, usually identical or nearly identical parts enclosing completely the coil (pot cores)

Definitions

  • the present invention relates to a pot core transformer according to the preamble of claim 1.
  • a device of this kind is basically known as a pot core inductive reactance from DE-A 1 439 441.
  • the known device is not a pot core transformer because it is provided with only one winding.
  • This winding consists of the serial connection of winding portions having different cross-sectional areas.
  • a provided air gap only serves to increase the inductivity of the inductive reactance.
  • an E-type transformer is known which is provided with an additional yoke in tight contact with the base and the peripheral walls for achieving an additional magnetic dispersion for protectional purposes.
  • An important goal in present day design of electrical equipment is reduction in size even when actual miniaturization is not attempted, space and volume reduction is considered desirable.
  • One way to accomplish such reduction is to combine functions in a single device structure.
  • the present invention makes use of increasing the effective leakage inductance of a transformer winding which comprises shunting a portion of the primary flux of the transformer with a high permeability material or increasing primary flux resistance by an air gap.
  • the invention comprises modification of a "pot core" transformer to add the function of one or more additional inductances without changing the characteristics of the device as a transformer.
  • Fig. 1 shows that one embodiment of the device may include a transformer 10, having a core 11, a primary winding 12, and a secondary winding 13, combined with a fixed inductance 14 in series with winding 13, and if desired, a fixed inductance 15 in parallel with winding 12.
  • Fig. 2 and 3 show the transformer 10 is of the "pot core" type. It comprises a bipartite housing 20 including hollow, coaxial, generally cylindrical sections 21 and 22, of ferrite or other material of high magnetic permeability, which contain windings 12 and 13 respectively.
  • Housing 21 comprises an end wall or base 23 from which a peripheral wall 24 extends to a rim 25, and from which a central pedestal 26 extends in the same direction; pedestal 26 is traversed by an axial hole 27.
  • Housing section 22 comprises an end wall or base 33 from which a peripheral wall 34 extends to a rim 35, and from which a central pedestal 36 extends in the same direction. Pedestal 36 is traversed by an axial hole 37.
  • Winding 12 is mounted in housing section 21 around its pedestal 26, and winding 13 is similarly mounted in housing section 22 about its pedestal 36.
  • a suitable fastener 39 such as a nylon screw 40 passes through holes 27 and 37 to hold the sections in assembled relation with the rims and pedestals of the secions in opposition and contact, as shown in Fig. 3.
  • a disc or washer 41 of ferrite or other suitable material is located in housing 20 between windings 12 and 13, to act as a magnetic shunt.
  • pedestal 36 may be provided with an accurately machined shoulder 42, and rims 25 and 35 may be machined to give cylindrical surfaces 43 accurately coaxial with shoulder 42.
  • Disc 41 is circular in section with a circular central bore 45 to fit shoulder 42 with a minimum air gap, and with a periphery at 46 uniformly spaced from rims 43 by a predetermined radial air gap 47.
  • a shoulder 52 is machined in rim 25 and pedestals 36 and 26 are machined to give cylindrical surfaces 53 accurately coaxial with shoulder 52.
  • a disc 54 of ferrite material has a periphery 55, to engage shoulder 52 with a minimum air gap, and a central bore 56 coaxial therewith to provide an air gap of predetermined width with the pedestal surfaces.
  • the same principal and shunt flux paths are present in this structure.
  • the housing portions are machined to have the concave cylindrical surfaces 43 of Fig. 3 and the convex cylindrical surfaces 53 of Fig. 4, thus providing both inner and outer radial air gaps with respect to disc 54, which is conveniently mounted with respect to the housing sections by suitable means not shown.
  • Fig. 6 shows the structure of Fig. 3 with further modifications.
  • pedestal 26 is machined off so as not to contact pedestal 36, but to be spaced axially therefrom by an air gap 63, and has a shoulder 64 to receive a disc 65 of permeable material.
  • the air gap 63 is in flux path 61, and functions as an inductor 15 (see Fig. 1) in parallel with the transformer winding.
  • a housing 70 has sections 71 and 72 with central pedestal 73 and 74 on which are mounted a primary winding 75 and secondary windings 76 and 77.
  • a ferrite disc 80 is mounted on pedestal 73 between winding 75 and 76, and has a radial outer air gap 81 with respect to housing section 71.
  • a ferrite disc 82 is mounted on pedestal 74 between windings 75 and 77, and has a radial outer air gap 83 with respect to housing section 72.
  • the principal flux paths in this embodiment of the invention are suggested by the arrow 84 on the right of the figure, and links the primary winding 75.
  • a secondary flux path is indicated by arrow 85 at the left of the figure, and links primary winding 75 but not secondary windings 76, while another secondary flux path is suggested by arrow 86 and links primary winding 75 but not secondary winding 77.
  • circuit equivalent of the structure is shown in Fig. 9, in which effective inductances 89 and 90 are shown in series with windings 76 and 77 respectively.
  • FIG. 8 A further modification of the structure of Fig. 7 is shown in Fig. 8.
  • pedestal 73 and 74 are cut away, so that they do not engage each other.
  • the flux paths are as shown in Fig. 8, passing through the air gap between the pedestals.
  • the circuit equivalent of the structure is shown in Fig. 10, where a further effective inductance 91 is shown in parallel with winding 75.
  • the invention comprises a means providing magnetic shunt paths in transformers to modify the leakage fluxes in such a fashion as to function as independent inductance units in series or in parallel with transformer windings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)

Claims (9)

1. Topfkernspulentransformator (10) mit einem Gehäuse (20) aus hochpermeablem Material, welches erste und zweite hohle Abschnitte (21, 22) mit jeweils einer Basis (23, 33), einer peripheren, sich von der Basis zu einem Rand (25, 35) erstreckenden Wand (24, 34) und einer sich von der Basis innerhalb der Wand erstreckenden Säule (26, 36) aufweist, wobei die Ränder und die Säule sich gegenüberliegen und sich wenigstens die Ränder berühren, und mit Wicklungen (12, 13), die in den Abschnitten um die Säulen angeordnet sind, gekennzeichnet durch ein flaches hochpermeables Element (41) vorgegebener Dikke zwischen Zweien der Windungen und mit einer den Säulen (26, 36) gegenüberliegenden zentralen Bohrung (45) und einem, den Rändern (25,35) gegenüberliegenden Umfang (40).
2. Transformator nach Anspruch 1, dadurch gekennzeichnet, daß die Säulen (26, 36) einen Luftspalt (63) zwischen sich bilden.
3. Transformator nach Anspruch 1, gekennzeichnet durch flache Elemente (80, 82) jeweils zwischen einer ersten Wicklung (75) und zwei anderen Wicklungen (76, 77).
4. Transformator nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß die Säulen (26, 36) sich berühren.
5. Transformator nach Anspruch 1, dadurch gekennzeichnet, daß sich das Element (41) in Berührung mit der Säule (26, 36) und den Rändern (25, 35) befindet.
6. Transformator nach Anspruch 1, dadurch gekennzeichnet, daß sich das Element (41) in Berührung mit einer der Säulen (26, 36) und den Rändern (25, 35) befindet.
7. Transformator nach Anspruch 1, dadurch gekennzeichnet, daß das Element (41) einen Abstand von den Rändern (25, 35) aufweist.
8. Transformator nach Anspruch 1, dadurch gekennzeichnet, daß sich das Element (41) einen Abstand von den Säulen (26, 36) aufweist.
9. Transformator nach Anspruch 1, dadurch gekennzeichnet, daß das Element (41) einen Abstand von den Rändern (25, 35) und von den Säulen (26, 36) aufweist.
EP19830109299 1982-09-23 1983-09-20 Topfkernspulentransformator Expired EP0104585B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US42233182A 1982-09-23 1982-09-23
US422331 1982-09-23

Publications (2)

Publication Number Publication Date
EP0104585A1 EP0104585A1 (de) 1984-04-04
EP0104585B1 true EP0104585B1 (de) 1986-09-24

Family

ID=23674417

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830109299 Expired EP0104585B1 (de) 1982-09-23 1983-09-20 Topfkernspulentransformator

Country Status (2)

Country Link
EP (1) EP0104585B1 (de)
DE (1) DE3366470D1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4123320A1 (de) * 1991-07-13 1993-01-28 Diehl Gmbh & Co Streufeldtransformator, insbesondere fuer gasentladungslampen
JPH06217062A (ja) * 1993-01-20 1994-08-05 Canon Inc Ｎｃｕ回路およびファクシミリ装置
CN115188571A (zh) * 2022-07-20 2022-10-14 海宁瑞思科技有限公司 一种微型光伏用变压器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB957152A (de) * 1900-01-01
FR797868A (fr) * 1934-02-06 1936-05-05 Transformateur avec dispositif pour augmenter la dispersion
FR995846A (fr) * 1948-09-23 1951-12-10 Thomson Houston Comp Francaise Perfectionnements à la fabrication des bobines ballast
DE951826C (de) * 1952-11-07 1956-11-08 Telefunken Gmbh Topfkern fuer symmetrische Spulenanordnung
DE1439441A1 (de) * 1963-09-18 1968-12-05 Sits Soc It Telecom Siemens Verlustarme Spulenwicklung fuer eine Induktivitaet
US3673491A (en) * 1970-12-21 1972-06-27 Orestes M Baycura Magnetic square wave voltage generator

Also Published As

Publication number Publication date
DE3366470D1 (de) 1986-10-30
EP0104585A1 (de) 1984-04-04

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