EP2092538A1 - Structure de bobine multiconnexion - Google Patents

Structure de bobine multiconnexion

Info

Publication number
EP2092538A1
EP2092538A1 EP07825566A EP07825566A EP2092538A1 EP 2092538 A1 EP2092538 A1 EP 2092538A1 EP 07825566 A EP07825566 A EP 07825566A EP 07825566 A EP07825566 A EP 07825566A EP 2092538 A1 EP2092538 A1 EP 2092538A1
Authority
EP
European Patent Office
Prior art keywords
electric conductor
conductor means
electric
point
support
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Withdrawn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
EP07825566A
Other languages
German (de)
English (en)
Inventor
Michele Cardone
Giovanni Cosmai
Roberto Faranda
Antonino Giglio
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.)
Politecnico di Milano
Tecnomagnete SpA
Original Assignee
Politecnico di Milano
Tecnomagnete SpA
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 Politecnico di Milano, Tecnomagnete SpA filed Critical Politecnico di Milano
Publication of EP2092538A1 publication Critical patent/EP2092538A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/15—Devices for holding work using magnetic or electric force acting directly on the work
    • B23Q3/154—Stationary devices
    • B23Q3/1546—Stationary devices using permanent magnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • 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
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/20—Electromagnets; Actuators including electromagnets without armatures
    • H01F7/206—Electromagnets for lifting, handling or transporting of magnetic pieces or material

Definitions

  • the present invention relates to a multiconnection coil structure, and particularly but without limitation to a rnulticonnection coil structure for use in a permanent magnet clamping apparatus for ferrous workpieces, as defined in the preamble of claim 1.
  • permanent magnet clamping apparatus as used herein is intended as any apparatus that uses permanently magnetized or magnetizable magnetic cores, which can be activated and/or deactivated by either reversing the magnetization of some of the magnetic cores or magnetizing and/or demagnetizing the cores.
  • Clamping apparatus of the above mentioned type are known in the art and used for holding ferromagnetic workpieces to machine tools, such as millers, lifting systems and similar devices.
  • These apparatus are usually composed of: a ferromagnetic frame adapted to contain a plurality of pole units, each having:
  • a coil having a bobbin on which an electric conductor is wound to form a winding, said coil being placed around each main magnetic core to activate and/or deactivate each pole unit of the clamping surface.
  • the pole units and the coils form an electromagnetic circuit which can activate or deactivate the magnetic clamping surface.
  • the electromagnetic circuit is designed to have at least two electric connections for supplying power to each coil.
  • the electric connections between the coil and a power source are obtained by manually soldering and/or crimping the terminal ends of the conductor wound around the bobbin of the coil. It shall be noted that the electric connections between the coils are also obtained by similar manual processes.
  • the object of the present invention is to provide a coil structure that can obviate the prior art drawbacks.
  • this object is fulfilled by a multiconnection coil structure as defined in the independent claim 1.
  • This object is also fulfilled by a permanent magnet clamping apparatus as defined in the independent claim 14.
  • the present invention provides a coil structure that has such a quality and reliability as to ensure perfect insulation of the various windings from the frame, no manual soldering and/or crimping operation being needed for electric connection between the various multiconnection coil structures and between the multiconnection coil structure and the power source.
  • An additional advantage achieved by the present invention is that it involves a well-determined time for fabricating the permanent magnet clamping apparatus, because different blocks of coil structures can be provided, prior to installation thereof in the frame of the permanent magnet apparatus, depending on specific employment requirements.
  • the present invention provides a multi ⁇ onnection coil structure that can considerably reduce the fabrication costs for the permanent magnet apparatus .
  • FIG. 1 is an exploded perspective view of a first embodiment of the coil structure of the present invention
  • FIG. 2 is a plan view of the first embodiment of the coil structure as shown in Figure 1;
  • Figure 3 is a sectional view of the first embodiment of the coil structure of Figure 2, as taken along line X-X;
  • FIG. 4 is a plan view of a circuit diagram that employs a plurality of coils as shown in Figure 2;
  • FIG. 5 is an exploded perspective view of a first embodiment of the coil structure of the present invention.
  • Figure 6 is a plan view of the coil structure as shown in Figure 5;
  • Figure 7 is a sectional view of the second embodiment of Figure 6, as taken along line Y-Y;
  • FIG. 1 is an exploded perspective view of a first embodiment of the coil structure of the present invention.
  • numeral 1 generally designates a multiconne ⁇ tion coil structure.
  • multiconnection coil structure 1 shall be simply indicated herein as “coil 1" .
  • the coil 1 comprises a support 2 (also known as bobbin) of predetermined profile 2A and an electric conductor element 3 wound on said support 2 to form a winding 4.
  • the electric conductor element 3 is embodied by a thin metal conductor, e.g. made of copper, having two terminal ends (not shown in the Figures) .
  • the support 2 is embodied by a non conductive polymer material, such as a plastic material.
  • the profile 2 ⁇ of the support 2 may have any one of triangular, quadrangular, polygonal, egg- shaped, elliptical and circular sections.
  • the coil 1 further includes first electric conductor means 5 which are electrically connected to a terminal end of said electric conductor 3 and second electric conductor means 6 which are electrically connected to the other terminal end of said electric conductor 3.
  • the first conductor means 5 in turn include two distinct electric connection elements 5A, 5B
  • the second electric conductor means 6 in turn include two distinct electric connection elements 6A, 6B.
  • the first electric conductor means 5 and the second electric conductor means 6 extend each between a first point 7 and a second point 8 of the predetermined profile 2A of the support 2.
  • each of the first electric conductor means 5 and the second electric conductor means 6 has such a shape as to enclose said predetermined profile 2A of said support 2 between the first point 7 and the second point 8 thereby creating two substantially equipotential surfaces.
  • the power supplied by the power source V to the winding 4 of the coil 1 through the electric connection element 5A of said first electric conductor means 5 and through the electric connection element 6A of said second electric conductor means 6, is also available to the electric connection element 5B and to the electric connection element 6B of said first electric conductor means 5 and said second electric conductor means 6 respectively.
  • the coil 1 is eventually equipped with electric multiconnections, i.e. a plurality of electric terminals, e.g. 5A, 5B and 6A, ⁇ B, said multiconnections being equipotential thanks to the first and second electric conductor means 5 and 6.
  • electric multiconnections i.e. a plurality of electric terminals, e.g. 5A, 5B and 6A, ⁇ B, said multiconnections being equipotential thanks to the first and second electric conductor means 5 and 6.
  • the first electric conductor means 5 represent the positive terminal and the second electric conductor means S represent the negative terminal.
  • the electric connection elements 5A and 5B of said first electric conductor means 5, as well as the electric connection elements 6A and SB of said second electric connection means 6 are electrically separated from each other.
  • the electric connection elements 5A and 5B of said first electric conductor means 5, as well as the electric connection elements 6A and 6B of said second electric connection means S can be located at the respective ends of said first electric conductor means 5 and said second electric conductor means 6.
  • the number of electric connections in the first and second electric conductor means 5 and 6 can be varied in response to specific requirements.
  • the electric connection elements 5A, 5B and 6A, SB are embodied by electric terminals.
  • the electric terminals 5A, 5B and 6A, 6B may be quick connect terminals such as those available under the name of "Faston terminals".
  • one of two quick connect terminals 5A is a male Faston terminal and the other is a female Faston terminal.
  • terminals 6A and 6B are a male Faston terminal and the other is a female Faston terminal.
  • the coil 1 is eventually equipped with electric multiconnections that are equipotential thanks to the provision of the first and the second electric conductor means 5 and 6, and also ensure electric and mechanical connection with any other coil. Thanks to this arrangement, in case of connection of multiple coils of the type as described hereinabove, there is no longer the need of supplying power to each coil by laying respective connection cables to connect the power supply with the coils and the coils with each other, but the coils need simply be connected together by fitting the male terminal of one coil in the female terminal of another.
  • Figure 4 shows a possible circuit arrangement of a plurality of coils 10 of the type as described hereinabove.
  • the plurality of coils 10 can be disposed in a matrix arrangement having three rows r1, r2, r3 and three columns c1, c2, c3.
  • each row rl, r2, r3 are electrically and mechanically connected together by means of the electric terminals and can be supplied with power from the power source V.
  • connection bridge 21 which ensures that the power from the power source V is present at the terminals of each coil of said plurality of coils 10 in the circuit arrangement.
  • the connection bridge 21 is embodied by an electric terminal 2IA having two electric connection elements, each being designed to be connected with a corresponding electric terminal 19A, 19B of the coil 19.
  • Such connection bridge 21 further includes two electric conductors 21B, 21C of suitable section, which can transfer the positive pole and the negative pole to the other rows r2 and r3 of the circuit matrix.
  • the first electric conductor means 5 and the second electric conductor means 6 are associated to the support 2.
  • the support 2 comprises a first flange 2B and a second flange 2C in axially spaced relationship.
  • a receptacle or groove 2D may be formed within the thickness of the first flange 2B,
  • the receptacle 2D may be also formed in the thickness of second flange 2C.
  • This receptacle 2D also extends between said first point 7 and said second point 8 of said predetermined profile 2A.
  • the receptacle 2D has such a shape as to provide a form fit with said first electric conductor means 5 and with said second electric conductor means 6.
  • the first electric conductor means 5 and the second electric conductor means 6 are accommodated in said receptacle 2D .
  • the first electric conductor means 5 and the second electric conductor means 6 are connected to the support 2 through further connection means 9 to ensure firm fixation of said first and second electric conductor means 5 and 6 to the support 2 of the coil l.
  • connection means 9 preferably consist of connectors of non conductive polymeric material, each of said connectors having a receptacle 9A and a slot 9B,
  • the receptacle 9 has such a shape as to accommodate the terminal ends of said first and second electric conductor means 5 and 6. Furthermore, said first and second electric conductor means 5 and 6 have projecting elements 5C, 6C at their respective terminals 5A, 6A, 5B, SB, which can provide a form fit with said slot 9B of said receptacle 9A.
  • first and second electric conductor elements 5 and 6 may be incorporated in said support 2, by providing a single cast that includes the support and the electric means S and 6.
  • the first electric conductor means 5 and the second electric conductor means 6 may be embodied by metal sheets of electric conductive material having a predetermined thickness and such a shape as to conform to the profile 2A of the support 2.
  • the thickness of said first electric conductor means 5 and said second electric conductor means 6 shall allow transfer of the power required for proper operation, for example, of a permanent magnet apparatus, as well as proper coupling with said receptacle 2D.
  • the metal sheets of said first and second electric conductor means 5 and 6 can have stiffening ribs 5D and 6D respectively.
  • the first embodiment preferably has the following features:
  • the profile 2 of the support 2A is a circular profile having a predetermined radius "r" ,
  • the receptacle 2D is formed in the flange 2B and extends with an annular shape all along the circumference of said flange 2B, and that
  • the first electric conductor means 5 and the second electric conductor means 6 are accommodated in said receptacle 2D and extend between said first point 7 and said second point S of said profile 2A, said first point 7 and said second point 8 being offset from each other at an angle in a range from 0° to 360°. preferably, said first point 7 and said second point S are in diametrically opposite positions, i.e. offset by 180°.
  • the metal sheets of said first and second electric conductor means 5 and 6 are embodied by metal sheets having the shape of an arc of a circle and substantially provide an arrangement in which the electric terminals 5A, 5B and 6A, 6B of each metal sheet 5, 6 are offset by about 180°.
  • the profile 2A of the support 2 has a circular section.
  • the coil 1 further comprises:
  • each of the first electric conductor means 5 and the second electric conductor means 6 extends between the first 7 and the second 3 point of the predetermined profile 2A of the support 2, and in the specific embodiment of Figure 5, each of the first electric conductor means 5 and the second electric conductor means 6 extends beyond half the circumference of the support 2. Otherwise, each of the first electric conductor means 5 and the second electric conductor means 6 can extend all along the circumference of the support 2.
  • the electric terminals 23A, ..., 23D and 24A, ... 24D may be quick connect terminals such as those available under the name of "Faston terminals" .
  • two of the four quick connect terminals 23A, ..,, 23D are male Fasten terminals and the others are female Faston terminals.
  • terminals 24A, ,.., 24D are male Fasten terminals and the others are female Faston terminals.
  • the coil I is eventually equipped with electric multiconnections, i.e. four pairs of electric terminals, i.e. 23A, ..., 23D and 24A, ..., 24D respectively, said multiconnections being equipotential thanks to the first and. second electric conductor means 5 and 6.
  • three additional coils electrically and mechanically connected to the first coil, may be also supplied with power through their respective electric terminals, and so on.
  • the first electric conductor means 5 and the second electric conductor means 6 are associated to the support 2, using well-known techniques.
  • the support 2 comprises the flange 2B and the flange 2C. Still referring to Figure 7, it can be appreciated that two distinct receptacles or grooves 2D and 2E may be formed in the thickness of the flange 2B.
  • the receptacle 2D, or the receptacle 2E or both receptacles 2D and 2E can be also formed in the thickness of the second flange 2C.
  • These receptacles 2D and 2E also extend between said first point 7 and said second point S of said predetermined profile 2A.
  • the receptacle 2D is designed to accommodate the first electric conductor means 5 and the receptacle 2E is designed to accommodate the second electric conductor means 6.
  • Figure S in which the elements described above are designated by identical reference numerals, there is shown a sectional view of a third embodiment of the present invention.
  • another conductor element 25 is also wound on the support 2A of the coil 1.
  • each of these conductor elements 3, 25 can form a respective winding 4, 26, It shall be further noted that, in the specific embodiment of Figure S, in addition to the first electric conductor means 5 and the second electric conductor means
  • the coil 1 also has third electric conductor means 27.
  • each of the first electric conductor means 5, the second electric conductor means 6 and the third electric conductor means 27 extends between the first point 7 and the second point 8 of the predetermined profile 2A of the support 2.
  • each of the first 5, the second 6 and the third 27 electric conductor means may include two distinct electric connection elements, having the same characteristics and the same position as shown above with reference to Figure 1. Otherwise, each of the first 5, the second S and the third 27 electric conductor means may include at least two distinct electric connection elements, having the same characteristics and the same position as shown above with reference to Figure 5.
  • the electric connection terminals may be quick connect terminals such as those available under the name of "Faston terminals" .
  • the first electric conductor means 5 are connected to a terminal end of the conductor element 3; the second electric conductor means 6 are connected to a terminal end of the conductor element 25; the third electric conductor means 27 are connected to the other terminal ends of the conductor elements 3 and 25, respectively.
  • the support 2 comprises the flanges 2B and 2C.
  • three distinct receptacles 2D, 2E, 2P may be formed in the thickness of the flange 213.
  • any one of the receptacles 2D, 2E and 2P or all of the receptacles 2D, 2E and 2F can be formed within the thickness of the second flange 2C.
  • These receptacles 2D, 2E, 2F also extend between said first point 7 and said second point S of said predetermined profile 2A.
  • the receptacle 2D is designed to accommodate the first electric conductor means 5
  • the receptacle 2E is designed to accommodate the second electric conductor means 6
  • the receptacle 2F is designed to accommodate the third electric conductor means 27.
  • the coil structure as shown in such Figure S may be advantageously used, for example, to create two different magnetization levels when the electric terminals of the electric conductor means are supplied with power from the power source V.
  • the embodiments of the coils 1 as described herein can be advantageously employed in a permanent magnet clamping apparatus for ferrous w ⁇ rkpieces as described hereinbefore .
  • the coil structure of the present invention fulfills the above mentioned needs and also obviates prior art drawbacks as set out in the introduction of this disclosure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnets (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

La présente invention concerne une structure de bobine multiconnexion (1) comprenant un support (2) d'un profil prédéterminé (2A) et au moins un élément conducteur de l'électricité (3, 25) enroulé sur ledit support (2) pour former un enroulement respectif (4, 26). La structure de bobine multiconnexion (1) est caractérisée en ce qu'elle comporte au moins un premier (5) et un second (6) moyen conducteur de l'électricité pour chacun desdits enroulements (4, 26). Le premier (5) et le second (6) moyen conducteur de l'électricité s'étendent chacun entre un premier (7) et un second (8) point dudit profil prédéterminé (2A). Le premier moyen conducteur de l'électricité (5) est électriquement connecté à une extrémité de borne du ou des conducteurs électriques (3, 25) et comprend au moins deux moyens de connexion électrique distincts (5A, 5B, 23A,…, 23D); le second moyen conducteur de l'électricité (6) est électriquement connecté à l'autre extrémité de borne du ou des conducteurs électriques (3, 25) et comprend au moins deux moyens de connexion électrique distincts (6A, 6B, 24A,…, 24D), de telle sorte que, lorsqu'un élément de connexion électrique (5A, 5B, 23A,…, 23D) des moyens conducteurs de l'électricité (5) et un élément de connexion électrique (6A, 6B, 24A,…, 24D) des seconds moyens conducteur de l'électricité (6) sont connectés à une source de courant (V), la source de courant (V) est également appliquée à au moins un autre élément de connexion électrique (5A, 5B, 23A,…, 23D) des premiers moyens conducteurs de l'électricité (5) et au moins un autre élément de connexion électrique (6A, 6B, 24A,…, 24D) des seconds moyens conducteurs de l'électricité (6).
EP07825566A 2006-11-16 2007-10-29 Structure de bobine multiconnexion Withdrawn EP2092538A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20062202 ITMI20062202A1 (it) 2006-11-16 2006-11-16 Struttura di dodina multiconnessione
PCT/IB2007/003314 WO2008059332A1 (fr) 2006-11-16 2007-10-29 Structure de bobine multiconnexion

Publications (1)

Publication Number Publication Date
EP2092538A1 true EP2092538A1 (fr) 2009-08-26

Family

ID=39198662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07825566A Withdrawn EP2092538A1 (fr) 2006-11-16 2007-10-29 Structure de bobine multiconnexion

Country Status (4)

Country Link
EP (1) EP2092538A1 (fr)
CN (1) CN101563736A (fr)
IT (1) ITMI20062202A1 (fr)
WO (1) WO2008059332A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102360686B (zh) * 2011-08-17 2012-12-26 吴叶亮 一种电磁线圈及其制作方法
CN106424997B (zh) * 2016-11-10 2018-09-04 新誉轨道交通科技有限公司 双层电机主极线圈焊接方法及其使用的夹具

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1052916A (fr) *
GB228281A (en) * 1923-11-07 1925-02-05 John Henderson Improvements in electrical coils more particularly for use in wireless telegraphy and telephony
DE3152925T1 (de) * 1981-08-10 1983-10-06 Caterpillar Tractor Co Schnell ansprechender elektromagnet
US4423399A (en) * 1982-04-23 1983-12-27 Essex Group, Inc. Electromagnetic contactor
IT1219706B (it) * 1988-06-10 1990-05-24 Cardone Tecnomagnetica Apparecchiatura magnetica di ancoraggio,con circuito di eliminazione del flusso residuo
JP2869285B2 (ja) * 1993-03-01 1999-03-10 三菱電機エンジニアリング株式会社 電磁コイル、この電磁コイルを用いる電磁接触器及びこの電磁コイルの製造方法
KR100652241B1 (ko) * 2005-09-13 2006-12-01 엘에스산전 주식회사 전자접촉기의 단자구조

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008059332A1 *

Also Published As

Publication number Publication date
CN101563736A (zh) 2009-10-21
WO2008059332A1 (fr) 2008-05-22
ITMI20062202A1 (it) 2008-05-17

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