EP0092204A2 - Bobine d'inductance - Google Patents

Bobine d'inductance Download PDF

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Publication number
EP0092204A2
EP0092204A2 EP83103679A EP83103679A EP0092204A2 EP 0092204 A2 EP0092204 A2 EP 0092204A2 EP 83103679 A EP83103679 A EP 83103679A EP 83103679 A EP83103679 A EP 83103679A EP 0092204 A2 EP0092204 A2 EP 0092204A2
Authority
EP
European Patent Office
Prior art keywords
winding
inductance coil
insulating cylinder
coil
ferromagnetic
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.)
Granted
Application number
EP83103679A
Other languages
German (de)
English (en)
Other versions
EP0092204A3 (en
EP0092204B1 (fr
Inventor
Giuseppe Marchegiani
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.)
Sirten Srl Italiana Reattanze Trasformatori Elettronica Nuclei Soc
Original Assignee
Sirten Srl Italiana Reattanze Trasformatori Elettronica Nuclei Soc
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 Sirten Srl Italiana Reattanze Trasformatori Elettronica Nuclei Soc filed Critical Sirten Srl Italiana Reattanze Trasformatori Elettronica Nuclei Soc
Priority to AT83103679T priority Critical patent/ATE24627T1/de
Publication of EP0092204A2 publication Critical patent/EP0092204A2/fr
Publication of EP0092204A3 publication Critical patent/EP0092204A3/en
Application granted granted Critical
Publication of EP0092204B1 publication Critical patent/EP0092204B1/fr
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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/361—Electric or magnetic shields or screens made of combinations of electrically conductive material and ferromagnetic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/08—Fixed transformers not covered by group H01F19/00 characterised by the structure without magnetic core
    • 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
    • H01F27/085—Cooling by ambient air
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
    • 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 present invention relates to an inductance coil particularly suitable in the cases in which very small room is available and enumbering problems exist, for example in railway field, and in which at the same time it is necessary to eliminate or at least essentially limit the outwardly directed noises.
  • inductances As it is known, one of the main problems about inductances is that of heating, sometimes intolerable, which the turns of coil windings undergo; it is further known that the operating temperature is a limiting factor as regards the operating conditions of the inductance, and the number of turns and the wire cross section size being the same, the current density which may pass within the winding will be as more high as better is the cooling effectiveness.
  • the solution of the problem consists in providing windings,the conducting turns of which are alternately arranged with respect to channels for the cooling air parallely circulating with respect to the coil axis.
  • the inductance magnetic circuit is formed partly by a lamellar ferromagnetic body, and partly by air (air gap).
  • the air part is as much more developed, the ferromagnetic part being proportionally reduced, as higher is the product of the number of turns by the current passing therethrough.
  • a ferromagnetic part is present within the coil, whereby a too high number of turns is not required, such as it would be necessary in the case of a magnetic circuit in air only.
  • the main object of the present invention is that of providing an inductance coil of extremely reduced size, maintaining an unchanged cooling effectiveness as that of the known coils, and permitting to eliminate or essentially reduce the outwardly dispersed magnetic flow.
  • an inductance coil of the type comprising at least one coil winding of wire alternately disposed with respect to channels for the cooling air flow, said winding being at least externally encompassed by an insulating cylinder, characterized in that at least externally and in position adjacent to said at least one winding a ferro-magnetic core is provided, said core being concentrically positioned with respect to said at least one winding.
  • inductance coil of the invention further windings are provided externally positioned with respect to the said outer insulating cylinder, said windings being short-circuited and having the purpose of reducing alternated current components by opposing the same thanks to the induced currents generated in the same further windings.
  • coil windings are provided positioned at the ends of and within the insulating cylinder, said windings carrying the same current of the primary winding passing through said windings, but in the opposite direction so as to reduce both the a.c. components and the d.c. ones of the outwardly directed flow.
  • a second ferromagnetic core is provided, mounted internally of the insulating cylinder which internally delimittes said coil winding, said second core being adjacent and preferably in contact with said insulating cylinder, and leaving a hollow passage coaxial with the axis of said
  • the inductance coil of the invention comprises a coil winding 10, of usual structure, the wire turns of which are alternately disposed with respect to channels 11 through which the cooling air is giuided and forced in the direction shown by arrows 12.
  • the coil winding 10 is encompassed by two concentric insulating cylinders 13 and 14.
  • a cylindrical ferromagnetic core 15 is coaxially mounted with respect to the winding 10 and externally of, but in a position adjacent to, the cylinder 13, said core substantially embracing the whole side surface of the winding 10. In this way any interference and disturbance of adjacent apparatus, in particular adjacent inductance coils, are eliminated without substantially changing the size of the inductance coil; as a matter of fact the core 15 forms a closing element for the magnetic flow linked to the winding 10, which otherwise would be outwardly dispersed.
  • the ferromagnetic core 15 may be, in a manner per se known, either in form of a cylinder of a wound band or in form of adjacent packs of lamellaplates, parallely positioned with respect to the coil axis.
  • a cylinder 18 is provided concentrically and externally of the core 15.
  • This cylinder 18 when made of ferromagnetic material, serves to collect the possible remaining flow which is dispersed outwordly notwithstanding the presence of the magnetic core 15 and, when made of a different conductor metal, it acts likewise a short-circuited closed turn and opposes to the a.c. components of the magnetic flow which might eventually escape from the magnetic core 15.
  • the cylinder 18 serves also as a supporting frame of the coil and for the assembling of the same at the desired position.
  • the fig. 3 shows an embodiment similar to that of fig. 2, from which it differs only because two coil windings 10 are provided, instead of one, thus giving place to two superimposed inductances.
  • ferromagnetic cores 19 are provided sized so that the air circulation is not hindered, said cores obviously acting to prevent the dispersed flow through the coil ends from passing.
  • FIG. 4 an embodiment substantially similar to that of fig. 2 is shown, with the exception that in addition to the ferromagnetic core 15 (not shown in the figures and similar to that of fig. 1) which encircles the outer insulating cylinder 13, a further ferromagnetic core 115 is provided in form of lamellar packs fastened at the adjacent surface of the inner insulating cylinder 14.
  • the ferromagnetic core 115 obviously can also be in form of a continuous wound element, having the function of collecting and guiding the lines of force of the magnetic field due to the reasons well known in the art.
  • coil windings 16 and 17 of fig. 2 may also be provided.
  • the core 115 extends from the insulating cylinder 14 towards the center, but leaving free passage along the axis of the coil either because the latter becomes lighter and because the costs are reduced, and finally because the efficiency of the coil itself is improved lower is the distance between core and winding the more effective is action of the ferromagnetic component . It is finally meant that some of the above described components can be substituted for by other components having an identical function and which accordingly are intended to be induded in the scope of present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Burglar Alarm Systems (AREA)
  • Filters And Equalizers (AREA)
EP83103679A 1982-04-16 1983-04-15 Bobine d'inductance Expired EP0092204B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83103679T ATE24627T1 (de) 1982-04-16 1983-04-15 Drosselspule.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2158282U 1982-04-16
IT8221582U IT8221582V0 (it) 1982-04-16 1982-04-16 Bobina d'induttanza.

Publications (3)

Publication Number Publication Date
EP0092204A2 true EP0092204A2 (fr) 1983-10-26
EP0092204A3 EP0092204A3 (en) 1984-02-15
EP0092204B1 EP0092204B1 (fr) 1986-12-30

Family

ID=11183916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83103679A Expired EP0092204B1 (fr) 1982-04-16 1983-04-15 Bobine d'inductance

Country Status (4)

Country Link
EP (1) EP0092204B1 (fr)
AT (1) ATE24627T1 (fr)
DE (1) DE3368807D1 (fr)
IT (1) IT8221582V0 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0151719A2 (fr) * 1983-12-06 1985-08-21 BBC Aktiengesellschaft Brown, Boveri & Cie. Système magnétique pour un tomographe à résonance magnétique nucléaire
CN102290217A (zh) * 2011-05-04 2011-12-21 广东海鸿变压器有限公司 悬挂式安装的c级立体卷铁心干式变压器线圈
WO2012110187A1 (fr) * 2011-02-15 2012-08-23 Sew-Eurodrive Gmbh & Co. Kg Ensemble servant à refroidir une bobine, et convertisseur
EP2642131A3 (fr) * 2012-03-20 2017-01-04 Hamilton Sundstrand Corporation Contrôleurs de moteur refroidis par air

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1398036A (fr) * 1964-03-24 1965-05-07 Electricite De France Inductance résistant aux efforts électrodynamiques élevés
DE1212626B (de) * 1960-08-22 1966-03-17 Gen Electric Abschirmvorrichtung fuer Transformatoren, Drosselspulen od. dgl.
FR1519919A (fr) * 1967-03-13 1968-04-05 Siemens Ag Bobine d'électroaimant refroidie par un liquide et procédé de fabrication d'une telle bobine
DE1294541B (de) * 1962-05-29 1969-05-08 Trench Electric Ltd Drossel ohne Eisenkern
DE2108344A1 (de) * 1971-02-22 1972-09-07 Transformatoren Union Ag Anordnung zur Abschirmung der Kesselwand von Transformatoren und Drosselspulen
US4233583A (en) * 1978-09-22 1980-11-11 Bicron Electronics Company Flux shielded solenoid

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1212626B (de) * 1960-08-22 1966-03-17 Gen Electric Abschirmvorrichtung fuer Transformatoren, Drosselspulen od. dgl.
DE1294541B (de) * 1962-05-29 1969-05-08 Trench Electric Ltd Drossel ohne Eisenkern
FR1398036A (fr) * 1964-03-24 1965-05-07 Electricite De France Inductance résistant aux efforts électrodynamiques élevés
FR1519919A (fr) * 1967-03-13 1968-04-05 Siemens Ag Bobine d'électroaimant refroidie par un liquide et procédé de fabrication d'une telle bobine
DE2108344A1 (de) * 1971-02-22 1972-09-07 Transformatoren Union Ag Anordnung zur Abschirmung der Kesselwand von Transformatoren und Drosselspulen
US4233583A (en) * 1978-09-22 1980-11-11 Bicron Electronics Company Flux shielded solenoid

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0151719A2 (fr) * 1983-12-06 1985-08-21 BBC Aktiengesellschaft Brown, Boveri & Cie. Système magnétique pour un tomographe à résonance magnétique nucléaire
EP0151719A3 (fr) * 1983-12-06 1985-11-21 BBC Aktiengesellschaft Brown, Boveri & Cie. Système magnétique pour un tomographe à résonance magnétique nucléaire
WO2012110187A1 (fr) * 2011-02-15 2012-08-23 Sew-Eurodrive Gmbh & Co. Kg Ensemble servant à refroidir une bobine, et convertisseur
CN102290217A (zh) * 2011-05-04 2011-12-21 广东海鸿变压器有限公司 悬挂式安装的c级立体卷铁心干式变压器线圈
CN102290217B (zh) * 2011-05-04 2012-08-22 广东海鸿变压器有限公司 悬挂式安装的c级立体卷铁心干式变压器线圈
EP2642131A3 (fr) * 2012-03-20 2017-01-04 Hamilton Sundstrand Corporation Contrôleurs de moteur refroidis par air

Also Published As

Publication number Publication date
DE3368807D1 (en) 1987-02-05
EP0092204A3 (en) 1984-02-15
EP0092204B1 (fr) 1986-12-30
ATE24627T1 (de) 1987-01-15
IT8221582V0 (it) 1982-04-16

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