GB751037A - Improvements in or relating to inductance coils having ferromagnetic cores - Google Patents
Improvements in or relating to inductance coils having ferromagnetic coresInfo
- Publication number
- GB751037A GB751037A GB9324/54A GB932454A GB751037A GB 751037 A GB751037 A GB 751037A GB 9324/54 A GB9324/54 A GB 9324/54A GB 932454 A GB932454 A GB 932454A GB 751037 A GB751037 A GB 751037A
- Authority
- GB
- United Kingdom
- Prior art keywords
- windings
- coil
- plastic
- former
- coils
- 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
Links
- 230000005294 ferromagnetic effect Effects 0.000 title 1
- 238000004804 winding Methods 0.000 abstract 4
- 239000000463 material Substances 0.000 abstract 3
- 239000004033 plastic Substances 0.000 abstract 3
- 229920003023 plastic Polymers 0.000 abstract 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 230000035699 permeability Effects 0.000 abstract 2
- 229920002223 polystyrene Polymers 0.000 abstract 2
- 229920003319 Araldite® Polymers 0.000 abstract 1
- 239000004952 Polyamide Substances 0.000 abstract 1
- 239000004698 Polyethylene Substances 0.000 abstract 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 210000003298 dental enamel Anatomy 0.000 abstract 1
- 238000001746 injection moulding Methods 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 229910000889 permalloy Inorganic materials 0.000 abstract 1
- 239000006223 plastic coating Substances 0.000 abstract 1
- 229920002647 polyamide Polymers 0.000 abstract 1
- 229920000728 polyester Polymers 0.000 abstract 1
- -1 polyethylene Polymers 0.000 abstract 1
- 229920000573 polyethylene Polymers 0.000 abstract 1
- 239000002966 varnish Substances 0.000 abstract 1
- 229910000859 α-Fe Inorganic materials 0.000 abstract 1
Classifications
-
- 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)
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
- Insulating Of Coils (AREA)
Abstract
751,037. Inductors. LIGNES TELEGRAPHIQUES ET TELEPHONIQUES. March 30, 1954 [April 23, 1953], No. 9324/54. Class 38 (2). An inductor, especially a loading coil for telecommunications circuits, has a magnetic core of ferrite material having values of permeability Á. of at least 2400, a Curie temperature of approximately 190‹ C. and values of F n /Á, h/Á<SP>2</SP>, t/Á and αÁ lower than 0.0005, 0.001, 0.001 and 0.002 respectively, where F n , h, t and αÁ are eddy current loss, hysteresis loss, residual loss and temperature coefficient of permeability as defined. A suitable material is that forming the subject of Specification 730,703. The core may be a pot with a central stem having an air gap, either built up from parts, Fig. 1 (not shown), or made in two halves either moulded or machined in the manner described in Specification 737,068, Fig. 10. The halves may be bolted together, Fig. 9 (not shown), or cemented together. They may be arranged for mutual rotation to vary the effective length of an oblique air gap. The windings may comprise single wires distributed in two or four compartments of a plastic former for side and phantom circuit coils respectively, Figs. 3, 4 (not shown). For better balance the windings may be wound together, Figs. 5-7 (not shown). The number of turns and size of wire may be less than in conventional coils, thus reducing mutual capacitance. The conductors may be insulated with enamel, varnish or plastic material which welds together, and the coil may be embedded in plastic such as polyamide or polystyrol, no former being needed. The windings may be insulated with vinyl chloride or polyethylene and surrounded by a polystyrol band cemented to the former: If preferred the windings may be impregnated or immersed in oil, or coated or filled with polyesters such as Araldite (R.T.M.) afterwards polymerized. Alternatively the coil may be filled with nitrogen. Two side-circuit and one phantom-circuit coil units may be clamped together between flanges 47, Fig. 11, or cemented together. To reduce magnetic coupling between adjacent units they may be separated or surrounded by a screen such as an iron washer, sheet of Permalloy C, or Mumetal (Registered Trade Mark), Figs. 12, 15-25 (not shown). They may be coated by injection moulding with an external cylindrical or octagonal plastic coating, Fig. 13 (not shown). The loading coils may be located inside the cables or joints, without external casings. A number of composite arrangements are described in detail and their properties tabulated. Specification 730,703 also is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR751037X | 1953-04-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB751037A true GB751037A (en) | 1956-06-27 |
Family
ID=9153457
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9324/54A Expired GB751037A (en) | 1953-04-23 | 1954-03-30 | Improvements in or relating to inductance coils having ferromagnetic cores |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB751037A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015082138A1 (en) * | 2013-12-04 | 2015-06-11 | Epcos Ag | Transducer component with inductivity adjustment |
-
1954
- 1954-03-30 GB GB9324/54A patent/GB751037A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015082138A1 (en) * | 2013-12-04 | 2015-06-11 | Epcos Ag | Transducer component with inductivity adjustment |
CN105765676A (en) * | 2013-12-04 | 2016-07-13 | 埃普科斯股份有限公司 | Transducer component with inductivity adjustment |
CN105765676B (en) * | 2013-12-04 | 2017-08-04 | 埃普科斯股份有限公司 | The transformer configuration element of adjustment with sensing |
US10256026B2 (en) | 2013-12-04 | 2019-04-09 | Epcos Ag | Transformer component with setting of an inductance |
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