EP0261796A1 - Conducteur contourné longitudinalement destiné à des dispositifs électriques à induction - Google Patents

Conducteur contourné longitudinalement destiné à des dispositifs électriques à induction Download PDF

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Publication number
EP0261796A1
EP0261796A1 EP87307425A EP87307425A EP0261796A1 EP 0261796 A1 EP0261796 A1 EP 0261796A1 EP 87307425 A EP87307425 A EP 87307425A EP 87307425 A EP87307425 A EP 87307425A EP 0261796 A1 EP0261796 A1 EP 0261796A1
Authority
EP
European Patent Office
Prior art keywords
conductor
coil
contoured
induction device
current carrying
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Withdrawn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
EP87307425A
Other languages
German (de)
English (en)
Inventor
Julian Alexander Watt
Richard Steven Lenzing
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.)
Superior Electric Co
Original Assignee
Superior Electric Co
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 Superior Electric Co filed Critical Superior Electric Co
Publication of EP0261796A1 publication Critical patent/EP0261796A1/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Withdrawn legal-status Critical Current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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires

Definitions

  • the present invention is related to inductive electrical devices in which there is a varying current density, and more particular to a longitudinally contoured conductor for such devices which minimizes the quantity of required conductor material.
  • Inductive electrical devices are well known and widely used in electrical systems as energy transfer or storage elements and include, for example, variable transformers and certain types of choke coils and reactors in which a coiled conductor induces a voltage in itself or another coil, frequently in association with a paramagnetic flux-carrying material.
  • the conductors of such devices are typically formed of round, rectangular, or square conductors with the conductor in any such device having a uniform cross section substantially throughout its length.
  • the current handling requirements in a conductur in such devices may change with respect to the position in the conductor; however, by using constant cross-section conductors, the coils are designed to withstand the maximum currents throughout the coil when, in actuality, only certain portions of the coil carry the maximum currents.
  • This conventional configuration wastes conductor material and results in a device that is heavier and larger than need be for the current carried.
  • the present invention overcomes the above limitations of conventional devices by providing a coil for an inductive device that is longitudinally contoured so that is has maximum cross sectional area in those sections where maximum current is carried and lesser cross sectional areas, proportional to the current carrued, in other sections of the coil.
  • a suggested method of producing such a coil also results in a greatly simplified manufacturing process.
  • Figure 1 is a graph, for a typical variable transformer, of the maximum current handling requirement of the transformer coil versus the turn position on the coil. Curves are shown for both constant current load operation and constant impedance load operation. For constant current load operation, it is seen that, at the beginning of the coil, the current is at its maximum, drops to about one-half maximum, and then rises to and remains at maximum along the last 20 percent of the coil. For constant impedance load operation, the current is at a low level along the first half of the coil and then rises along the rest of the coil.
  • Figure 2 shows how a coil might be contoured, in accordance with the present invention, for the transformer requirements shown on Figure 1.
  • the contouring indicated satisfies the requirements for both constant current and constant impedance load conditions.
  • the cross sectional area is relatively large to handle constant current load conditions, drops to a lower level when the current is relatively low under either load condition, and then rises to its maximum toward the end of the coil to handle the maximum current under constant impedance load operation.
  • Figure 3 is Figure 2 shaded to show coil material saved in a coil i n accordance with the present invention over conventional construction.
  • the lower, shaded area shows the relative amount of coil material used in a coil contoured in accordance with the invention, and the upper, shaded area shows the relative amount of coil material saved over a standard coil. It follows that the entire shading shows the relative amount of material used on a standard coil. For the design under construction, there is a savings of about 20 percent in coil material.
  • Figure 4 shows a coil constructed in accordance with the present invention and includes a conductor 10 on the surface of a tube of insulating material 11. Beginning at the left end of the coil 10, section “A” begins with relatively wide coil turns decreasing to the minimum width section "B". the width of the coil turns increases through section “C” to the maximum width coil turns in section “D” at the right end of the coil 10. The contouring is substantially shown on Figure 2.
  • the coil may be cut from a solid tube of electrical grade copper. Prior to cutting the contoured turns, the coil is stabilized by threading the inside diameter of the copper tube, screwing it onto the outside diameter of a threaded tube of the insulating material 11, and bonding these two pieces together. The bonding may be achieved by vacuum impregnating the assembly with transformer varnish, thus thoroughly stabilizing the future coil. After this stabilization process has been completed, the coil is cut from the copper tube by a numerically controlled machine. Numerically controlled machining can easily vary the pitch of the cuts made through the copper tube, thus achieving the desired coil conductor width variances through simple numerically controlled programming.
  • the completed coil, stabilized on the insulating tube, requires very little finish machining.
  • the procedure also allows an accurate brush guide to be easily machined into the coil, if the coil is of the type requiring a contact brush.
  • another advantage to the present invention is in eliminating complicated manufacturing processes and costly tooling. Specifically, it eliminates the need for winding/coiling rectangular or square wire and the complicated process of accurately positioning and stabilizing turns of the transformer's coil.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP87307425A 1986-08-25 1987-08-21 Conducteur contourné longitudinalement destiné à des dispositifs électriques à induction Withdrawn EP0261796A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US90011886A 1986-08-25 1986-08-25
US900118 1986-08-25

Publications (1)

Publication Number Publication Date
EP0261796A1 true EP0261796A1 (fr) 1988-03-30

Family

ID=25411997

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87307425A Withdrawn EP0261796A1 (fr) 1986-08-25 1987-08-21 Conducteur contourné longitudinalement destiné à des dispositifs électriques à induction

Country Status (2)

Country Link
EP (1) EP0261796A1 (fr)
JP (1) JPS6356904A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998024098A1 (fr) * 1996-11-27 1998-06-04 British Nuclear Fuels Plc Ameliorations relatives a des bobines
EP1265260A1 (fr) * 2001-06-06 2002-12-11 Nexans Fil métallique
DE10120236C1 (de) * 2001-04-19 2003-01-30 Siemens Ag Elektrische Wicklungsanordnung
FR2854982A1 (fr) * 2003-05-16 2004-11-19 Jean Paul Scherrer Enroulement pour transformateur et son procede de fabrication

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5791968A (en) * 1992-10-21 1998-08-11 Kawasaki Jukogyo Kabushiki Kaisha Grinding method and grinding system for steels

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE295188C (fr) *
DE414841C (de) * 1921-11-20 1925-06-13 Edmund Schroeder Transformator fuer elektrische Schweiss- und Erwaermungsmaschinen
DE950871C (de) * 1953-09-18 1956-10-18 Standard Elek K Ag Aus parallel geschalteten Scheibenspulen aufgebaute Hochstromwicklung fuer Transformatoren
FR1209196A (fr) * 1958-05-31 1960-02-29 Centre Nat Rech Scient Nouvelles bobines sans fer pour la production de champs magnétiques permanents ou transitoires
FR1308052A (fr) * 1961-09-22 1962-11-03 Comp Generale Electricite Enroulement pour transformateur
US3731243A (en) * 1971-12-08 1973-05-01 A Davis Inductive winding
US4135173A (en) * 1976-05-14 1979-01-16 General Electric Company Low volume sheet-wound transformer coils with uniform temperature distribution

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6059509B2 (ja) * 1981-03-02 1985-12-25 川崎製鉄株式会社 高温炉炉内測定用ゾンデ

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE295188C (fr) *
DE414841C (de) * 1921-11-20 1925-06-13 Edmund Schroeder Transformator fuer elektrische Schweiss- und Erwaermungsmaschinen
DE950871C (de) * 1953-09-18 1956-10-18 Standard Elek K Ag Aus parallel geschalteten Scheibenspulen aufgebaute Hochstromwicklung fuer Transformatoren
FR1209196A (fr) * 1958-05-31 1960-02-29 Centre Nat Rech Scient Nouvelles bobines sans fer pour la production de champs magnétiques permanents ou transitoires
FR1308052A (fr) * 1961-09-22 1962-11-03 Comp Generale Electricite Enroulement pour transformateur
US3731243A (en) * 1971-12-08 1973-05-01 A Davis Inductive winding
US4135173A (en) * 1976-05-14 1979-01-16 General Electric Company Low volume sheet-wound transformer coils with uniform temperature distribution

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998024098A1 (fr) * 1996-11-27 1998-06-04 British Nuclear Fuels Plc Ameliorations relatives a des bobines
DE10120236C1 (de) * 2001-04-19 2003-01-30 Siemens Ag Elektrische Wicklungsanordnung
EP1265260A1 (fr) * 2001-06-06 2002-12-11 Nexans Fil métallique
FR2854982A1 (fr) * 2003-05-16 2004-11-19 Jean Paul Scherrer Enroulement pour transformateur et son procede de fabrication

Also Published As

Publication number Publication date
JPS6356904A (ja) 1988-03-11

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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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18D Application deemed to be withdrawn

Effective date: 19911204

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LENZING, RICHARD STEVEN

Inventor name: WATT, JULIAN ALEXANDER