EP4139944A1 - Bobine et procédé destiné à produire la bobine - Google Patents

Bobine et procédé destiné à produire la bobine

Info

Publication number
EP4139944A1
EP4139944A1 EP21717067.9A EP21717067A EP4139944A1 EP 4139944 A1 EP4139944 A1 EP 4139944A1 EP 21717067 A EP21717067 A EP 21717067A EP 4139944 A1 EP4139944 A1 EP 4139944A1
Authority
EP
European Patent Office
Prior art keywords
coil
connection area
tube
inductive
section
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.)
Pending
Application number
EP21717067.9A
Other languages
German (de)
English (en)
Inventor
Stephan BÜHLMAIER
Anneliese Drespling
Galdeano Felipe JEREZ
Joachim Sorg
Herbert Lux
Gerhard Proks
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.)
TDK Electronics AG
Original Assignee
TDK Electronics AG
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 TDK Electronics AG filed Critical TDK Electronics AG
Publication of EP4139944A1 publication Critical patent/EP4139944A1/fr
Pending legal-status Critical Current

Links

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
    • H01F27/29—Terminals; Tapping arrangements for signal 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
    • 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
    • H01F27/02—Casings
    • 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
    • H01F27/22—Cooling by heat conduction through solid or powdered fillings
    • 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
    • H01F27/292—Surface mounted devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/10—Connecting leads to windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • 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
    • H01F2017/048—Fixed inductances of the signal type  with magnetic core with encapsulating core, e.g. made of resin and magnetic powder

Definitions

  • the invention relates to a coil, comprising a tube made of conductive material, and a method for producing the coil.
  • a weak point can be the connection of the wire to a contact element which is required for external contacting.
  • the connection which is usually realized with welds or soldered points, can have an at least slightly increased resistance due to the alloy used, which contains copper, tin or nickel, or due to contamination with oxygen.
  • the resistance can be considerably increased. This can result in a high contact resistance, which causes a high power loss.
  • an increased thermal load can also occur at this point, which in a harmless case can lead to failure of the coil or, in the case of serious consequences, to a fire.
  • the configuration of the contact and the supply line of the coils has a serious effect on the electrical properties of the coil.
  • the large ratio of the dimensions of the supply lines to the dimensions of the Coil has a considerable effect on the properties of the coil as an electronic component.
  • the object of the present invention is to provide a coil with improved properties.
  • a further object of the present invention is to provide a manufacturing method for a coil.
  • the present object is achieved by a coil according to claim 1. Further embodiments of the coil and a method for producing the coil can be found in the further claims.
  • a coil which has a tube with a tube wall made of an electrically conductive material, the tube having an inductive section in which a gap is arranged in the tube wall which forms the tube wall in the inductive section into a helix, and wherein the tube has at least one contact section having a connection area and at least one connection area, the connection area having the same contour as an adjoining section of the coil, and the connection area forming an electrical connection of the coil, the connection area being the connection area with the inductive section electrically connects .
  • An elongated hollow body can be referred to as a tube which has an opening which extends from a first end of the body through the entire body to a second end which is opposite the first end.
  • the tube can be symmetrical about its longitudinal axis, the longitudinal axis extending from the center of a base at the first end to the center of a base at the second end.
  • the tube can have a circular, oval or rectangular cross section. However, other cross-sections are also possible.
  • a helical structure can be referred to as a helix.
  • the helix can in particular form turns of the coil.
  • the tube can in particular have a helical gap in the tube wall, as a result of which the turns of the coil are formed from the tube.
  • the tube is made of a conductive material.
  • a conductive material is understood to mean materials with a conductivity of more than 10 4 S / m, but in particular materials with a conductivity of more than 10 5 S / m or more than 10 6 S / m. Materials with a very high conductivity, for example metals such as copper, aluminum, silver or gold, can be suitable for this.
  • Industrial steels such as carbon steel, stainless steel, alloy steel or tool steel can also be suitable as starting material for pipe.
  • the tube has the inductive section and at least one contact section.
  • the inductive section can form an inductance due to the coil formed by the gap.
  • the inductive section and the contact sections are formed in one piece from a material of the tube wall.
  • no connection partners such as solder, are required.
  • the inductive section and the contact section can be formed by a corresponding structuring of the pipe wall and remain connected to one another by the pipe material.
  • the coil has the advantage that no internal connection points are required to connect an inductance to a connection. Rather, the inductive area and the contact area can be formed integrally.
  • the coil has a lower total resistance than a coil, which requires internal connection points to connect an inductance to a terminal.
  • the pipe does not have to be round in cross-section for this, but can, for example, be oval, square, rectangular, polygonal, square with rounded corners, rectangular with rounded corners or polygonal with rounded corners.
  • a square cross-section offers the advantage of optimal utilization of the available installation space with a given height or width.
  • the base area of the tube can be flat, ie the expansions of the tube that span the base area, large compared to the expansion into a height, and the height can be small. Or the pipe can have a small footprint with a considerable height.
  • a flat and flat shape can be advantageous.
  • a tubular shape may be advantageous which has a small base area but a significant height.
  • the connection area has the same contour as the adjacent area of the coil. It is therefore possible to dispense with a deformation of the connection area, which would be transferred to the directly connected helix.
  • Deformation means, in particular, bends and embossings.
  • a force acting on the connection area has a direct effect as a bending moment on the inductive section and leads to a deformation of the helix.
  • the pitch of the helix which means the regularity of the turns and the gaps in the helix, can deteriorate even with a small force acting on the connection area.
  • a helix can thereby have a smaller gap width on one side and a larger gap width on the opposite side.
  • a stronger force in the connection area can also easily cause a short circuit in the helix, since turns of the helix, especially those close to the connection area, can be bent together and then touch.
  • the contour is understood to mean an external shape which the region or section of the helix has when viewed in a direction parallel to the longitudinal axis of the tube. For example, if the pipe is square and the connection area is on a straight side of the square, the connection area is also straight. If the adjacent section of the helix has a corner, the contour of the corner will also be present in the connecting section. In the case of a round tube, the connecting section accordingly has the contour of a segment of a circle. An adjacent section of the helix and the connecting area that have the same contour have, can in particular be arranged parallel to one another.
  • a transition from the connection area to the inductive section can be straight in a direction of a longitudinal axis of the pipe.
  • a weakening of the material at this point can be avoided, thus preventing breakage.
  • a straight transition avoids a change in the path or curvature of a flowing current, thus avoiding unplanned inductances in the coil.
  • the inductive region can preferably have no deformation. Since the connection area has the same contour as the adjoining section of the helix, there is no need to deform the connection area and thus to dispense with a force acting on the connection area. An action of force on the connection area, which also leads to a deformation of the connection area, can easily lead to deformations within the helix. Even a small deformation of the inductive area can lead to changes in the pitch, which characterizes the coil to gap ratio and the regularity of the turns of the coil, and to variations in the electrical properties of the coil, which means that it no longer meets the planned requirements. Stronger deformations can compress individual turns of the helix and thus even lead to a short circuit in the coil.
  • connection area can be formed by deforming the pipe wall. In this way, an integral construction of the coil from the connection area up to and including the inductive section can be implemented and a series resistance of the coil can be kept low.
  • connection area and the connection area can be in a plane which is perpendicular to a longitudinal axis of the pipe.
  • Connection areas arranged in this way do not lengthen the dimensions of the entire coil, since the connection area does not adjoin the connection area in the direction of the longitudinal axis of the pipe.
  • the entire coil length can thus be kept short relative to the helix and a favorable form factor can be achieved for the coil.
  • connection area can have a flat surface which forms a solderable connection.
  • the coil can in particular be designed to be soldered onto a conductor track, for example a circuit board.
  • the inductive section can be spaced apart from a support surface by part of the connection area. This has the advantage of mechanical and thermal insulation of the inductive area from a support surface on which the coil is mounted. This inhibits the transmission of vibrations from the coil or heat to a mounting surface such as a circuit board.
  • the magnetic field of the coil is also less strongly influenced by a spaced-apart mounting surface, so that the coil has electrical properties as expected.
  • the spacing of the coil from a support surface ensures that sufficient magnetic material can also be arranged between the coil and the support surface. In this way, the coil can be enveloped evenly by the magnetic material, with which a uniform magnetic field can be generated around the coil and the coil is additionally protected from all sides.
  • the inductive section can be spaced apart, for example, by means of L-shaped connection areas.
  • a vertical part of the L-shaped connection area acts as a spacer and a horizontal part can be the flat surface for electrical contacting.
  • the vertical part of the connection area separates the inductive section of the coil from a mounting surface, such as a printed circuit board, to which the coil can be electrically connected via the horizontal part.
  • the coil can have a magnetic core.
  • a ferromagnetic core for example, can ensure a higher magnetic flux density in the coil and an increased inductance of the coil.
  • Suitable materials for the core can be the metals nickel zinc, manganese zinc and cobalt, as well as other alloys.
  • the core is not limited to cores arranged exclusively inside the coil, but also includes cores which form the core integrally as part of a modular coil housing.
  • the embodiment of a coil with a modular coil housing can improve the electromagnetic compatibility of the coil. By using, for example, an EP core as the housing, the electromagnetic shielding can be achieved through the housing, especially at high frequencies Applications, are improved and the electromagnetic compatibility is increased.
  • the pipe can be embedded in a plastic in order to protect the pipe against mechanical influences, but also against temperature and chemical influences.
  • Epoxy resin, phenyl resin, but also silicones are suitable as plastics.
  • Powder with magnetic properties such as iron powder, or magnetic nanoparticles can be mixed into the plastic.
  • the inductance of the coil can be increased and the electrical properties improved.
  • the inductance can be adjusted via the proportion of magnetic particles in the plastic.
  • the coil can furthermore also have a magnetic core when it is embedded in a plastic, regardless of whether it contains a proportion of magnetic powder, in order to increase the inductance of the coil.
  • the coil can have an outer diameter of 0.2 to 50 mm.
  • the outside diameter of the coil can preferably be in the range between 0.5 and 20 mm. This size is particularly suitable for providing coils that are suitable for Applications on a printed circuit board is suitable.
  • the outside diameter should not be smaller than 0.2 mm, preferably not smaller than 0.5 mm, since otherwise such a small coil would be produced that the automatic parts handling would be associated with considerable technical difficulties.
  • the outside diameter should not be larger than 50 mm, preferably not larger than 20 mm, since otherwise the manufacture of the coil from a tube appears uneconomical.
  • the coils can in particular be the coils described above.
  • the at least two coils are arranged in a common housing.
  • the housing can be formed by a plastic in which both coils are embedded.
  • the two coils can be arranged spatially parallel to one another.
  • the coils are preferably arranged in such a way that the coils can be electrically contacted individually and are not interconnected in the module.
  • the coils can be connected to one another electrically in parallel or in series in order to give the entire module a desired inductance. In this way it is possible to assemble a module from several coils in such a way that the entire module has a higher or lower inductance than the individual coils.
  • the use of the module can shorten the assembly of a printed circuit board with a large number of coils and thus lead to a cycle time reduction in a manufacturing process.
  • the module instead of a multitude of individual When assembling the coils, for example with a pick-and-place machine, only one module, instead of several individual coils, has to be positioned on the circuit board. The module can thus simplify a subsequent process in which the module is installed.
  • the arrangement of several coils within a module saves space compared to the arrangement of several individual coils next to one another.
  • the coil can in particular be the previously described coil.
  • the method comprises the following steps: a. Providing a pipe with a pipe wall made of an electrically conductive material, and b. Generating a gap in an inductive section of the tube, the gap in the inductive section forming the tube wall into a helix, and the shaping of at least two sections of the tube into contact sections, c. Deforming a first part of the contact sections to each at least one connection area, wherein a second part of the contact sections maintains the shape of the pipe wall and forms a connection area, the connection area electrically connecting the connection area to the inductive section.
  • the inductance of the inductive section can only be created by creating the gap.
  • the gap can be a cutting gap that is generated with a laser.
  • the shape of the contact section can also be produced with a laser, in particular in a laser process together with the production of the gap.
  • a laser process is suitable for creating the gap in the inductive sections, but also for creating a recess in the contact sections of the pipe.
  • the laser process has the advantage of being flexible and fast.
  • the laser process has the advantage of not generating any mechanical stress, as it works without contact and leaves little residue.
  • Further alternatives for creating the gap can be, for example, a milling process, a sawing process or water jet cutting.
  • Step b above. may have a further substep, wherein a recess is formed in the contact section of the pipe by removing a region of the pipe wall.
  • the recess in the contact section of the tube and the gap in the inductive area can be produced together in a single process step. Accordingly, the entire step b. can be produced in a single process step, for example by means of laser cutting.
  • connection area can be formed by deforming the first part of the contact section in a direction perpendicular to the longitudinal axis of the tube. Since the connection area is not in one direction of the The longitudinal axis of the pipe is deformed, the deformation of the connection area in the direction perpendicular to the longitudinal axis does not extend the coil.
  • a connection area that extends predominantly in a direction perpendicular to the longitudinal axis of a pipe can avoid increasing the length of the entire coil too much compared to the length of the inductive section or the helix.
  • a first part of the contact sections can be formed into a connection region by a stamping process.
  • Forming, such as a bend or an embossing, with the help of a stamping process is efficient, reliable and reproducible.
  • a second part of the contact sections which can become the connection area through the stamping process, can be supported by a counter-stamp or a support surface during the stamping process, so that no bending forces act on the second part during the stamping process.
  • the counter punch can be adapted in shape to the contour or outer shape of the pipe. Since no bending moment acts on the connection section, the connection area retains the contour of the pipe wall from which it is formed and is therefore the same as the contour of the adjacent inductive section. A force acting on the inductive section, which would lead to an undesired deformation of the inductive section, is also avoided. Even a slight deformation of the inductive section can result in a change in the electrical properties of the coil.
  • connection area can even lead to a short circuit in the inductive area, in that two adjacent windings of the helix touch each other as a result of the force acting.
  • a coil strand can be generated by generating several inductive sections along the tube, in each of which a gap is generated which forms the tube wall into a helix in the respective inductive section, and a contact section is formed between two inductive sections.
  • a first part of the contact sections can each be formed into at least one connection area, and a second part of the contact sections retain the shape of the pipe wall and form a connection area, the connection area electrically connecting the connection area to the inductive section.
  • Such a coil train can optimize the handling of the coils in production. Several coils can be processed at the same time, which in turn can lead to a reduction in cycle times in production. In addition, material can be saved by creating several inductive sections in one pipe.
  • connection area can be formed by deforming the pipe wall in a direction perpendicular to the longitudinal axis of the pipe.
  • a deformation of the pipe wall to form a connection area in a direction perpendicular to the longitudinal axis of the pipe makes it possible to form a connection area without causing a change in length of the coil strand, be it an expansion or compression.
  • a deformation in a direction parallel to the longitudinal axis would inevitably result in a change in the length of the coil strand.
  • a coil strand shaped in this way therefore retains its defined overall length, despite the deformation process for the connection area.
  • the handling of the coil strands is improved because the same dimensions and therefore the same framework conditions can be assumed in different manufacturing steps in the process line.
  • a constant length of the coil strands over the entire production is particularly advantageous in the manufacturing process, since no additional measurements or new input of the framework conditions are necessary in various production steps, such as the separation of the coil strand.
  • a separation of the coil strand take place perpendicular to the longitudinal axis of the tube between two inductive sections.
  • a coil strand can then be separated into several coils.
  • the coils can be divided up individually so that only one inductive section with two adjacent contact sections is generated at a time.
  • coils or coil strands can be embedded in plastic and thus form a package.
  • the coils or coil strands can already have a magnetic core at this point. It is advantageous here to arrange the coil strands parallel to one another before embedding. By embedding multiple strands of coils at the same time and not individually, the Manufacturing process can be accelerated.
  • the plastic protects the coils from mechanical, temperature and chemical influences. Powder with magnetic properties or magnetic nanoparticles can also be mixed into the plastic. With the addition of magnetic particles to the plastic, the inductance of the coil can be increased and also adjusted via the proportion of magnetic particles in the plastic.
  • magnetic cores in the coil strands or the coils. This can increase the inductance of the coils or coil strands.
  • an arrangement of the cores in the coil strands before embedding in a plastic makes it possible to produce coils with a magnetic core, which are embedded in a plastic, which can also have magnetic components. This can increase the inductance and electromagnetic compatibility of the coils.
  • the coils After embedding several parallel coil strands in a package, the coils can be separated transversely and parallel to the longitudinal axis of the coil strands. It is advantageous here to lead the dividing line through the contact sections of the coils. The package is thus separated into individual coils. It is possible to separate the package first across and then in parallel, and to separate the package first in parallel and then across.
  • Another aspect relates to a method for producing a module.
  • the package which has a plurality of coil strands arranged in parallel, can be separated transversely to the longitudinal axis of the strands. With this option, too, it is advantageous to have the dividing line through the contact sections of the coils respectively. There is no separation into individual coils parallel to the axis.
  • the module has at least two coils in a common housing, the tube having a contact section which is divided into a connection area and a connection area.
  • the process of making the module has the following steps:
  • Figure la shows a three-dimensional representation of a possible embodiment of a pipe.
  • Figure lb shows a three-dimensional representation of a possible second embodiment of a pipe.
  • Figure 2 shows a three-dimensional representation of a coil strand.
  • FIG. 3 shows a three-dimensional representation of an intermediate product in the production of a coil from the coil strand.
  • FIG. 4 shows a three-dimensional representation of a coil according to an embodiment of the invention.
  • FIG. 5 shows a three-dimensional representation of several coil strands which are embedded in plastic to form a package.
  • FIG. 6 shows a three-dimensional representation of a coil that has been embedded in plastic and is an individual component ready for use.
  • a tube 2 is shown, each with a round and a rounded square cross-sectional area.
  • a tube 2 is an elongated hollow body having an opening that extends from a first end of the body through the entire body to a second end opposite the first end.
  • the tube 2 can be symmetrical to its longitudinal axis 3, the longitudinal axis 3 extending from the center of the base at the first end to Extends center point of the base of the second end.
  • the tube 2 can have a circular, oval, rectangular or polygonal cross-sectional area. Other cross-sections are also possible.
  • the tube 2 can have an outside diameter of 0.2 to 50 mm.
  • the outer diameter of the tube 2 can preferably be in the range between 0.5 and 20 mm. This size is particularly suitable for producing coils 1 which are suitable for applications on a printed circuit board.
  • the pipe wall 6, the thickness of which is determined by the distance between the inner radius and the outer radius of the pipe 2, can vary greatly depending on the pipe 2 used, with a thickness of less than 1 mm being advantageous for machining.
  • the jacket surface 5 of the tube 2 runs along the outer radius in the direction of the longitudinal axis 3.
  • the tube 2 consists primarily of an electrically conductive material.
  • the tube 2 represents a starting material that is used in the manufacture of a coil 1.
  • the tube 2 shown in FIG. 1 a can initially be structured into a coil strand.
  • Figure 2 shows the coil strand.
  • the tube 2 can in particular be structured by a laser process in which inductive sections 7 and contact sections 8 are formed in the tube 2. The inductive sections 7 and the contact sections 8 alternate along the tube 2.
  • a gap 4 is created which penetrates a pipe wall 6 and forms the pipe wall 6 into a helix. This creates an inductance of the inductive sections 7.
  • the contact sections 8 are in the course of the manufacturing process in part Connection area 11 is reshaped, with another part of the contact section becoming a connection area 10. During the structuring of the tube 2, a recess is formed in the contact sections 8, a part of the tube wall 6 being removed.
  • the handling of the bobbins 1 in production is optimized by the bobbin train. Several coils 1 can thus be treated at the same time, which leads to a cycle time reduction in production. In addition, by producing a plurality of inductive sections 7 in a tube 2, material can be saved.
  • the inductive sections 7 are integrally connected to one another by the contact sections 8 and do not have any unnecessary contact resistance between one another.
  • the different inductive sections 7 of the coil strand can have different or the same inductances. It is thus possible to produce different coils 1 from a tube 2, the inductance of which can be varied in each case, and which are therefore suitable for a wide variety of applications.
  • the inductances can be varied, for example, via the number of turns formed with the gap 4 or with the spacing of the gap 4 in the direction of the longitudinal axis 3 after one revolution around the tube 2, which corresponds to the width of the turns.
  • the columns 4 shown are the same and consequently the inductance of the individual inductive sections 7 are also the same.
  • FIG. 3 shows a three-dimensional representation of an intermediate product in the production of a coil 1 from the coil strand. The coil strand was separated along dividing lines 12 which run transversely to the longitudinal axis 3 of the coil strand.
  • the coil 1 has a tube 2 made of electrically conductive material, a gap 4, which runs along a jacket surface 5 and around the longitudinal axis 3 of the tube 2, was created and thus forms an inductive section 7.
  • the entire tube 2 can be structured in such a way that only a single inductive section 7 and two contact sections 8 adjoining this result. Accordingly, the tube 2 can be structured into the intermediate product shown in FIG. 3, the tube 2 being cut to a suitable length.
  • the contact section 8 and the inductive section 7 are directly connected to one another.
  • the contact section 8 and the inductive section 7 are formed integrally and in one piece from the structured tube wall 6.
  • FIG. 4 shows the coil 1 after a first part of the contact sections has been bent into two connection areas 11 with the aid of a stamping process, a non-deformed second part of the contact sections forming the connection area 10.
  • the second part of the contact sections was supported by a counter-stamp or a support surface in order not to allow any bending forces or moments to act on the second part during the stamping process.
  • the counter punch is preferably adapted in shape to the contour or outer shape of the tube 2. Due to the lack of bending moment on the Connection area 10, connection area 10 remains unchanged and has the same contour of pipe wall 6 as the contour of the adjoining inductive section.
  • connection area 10 Since the force of the stamping process in the connection area 10 is neutralized with the aid of the counter-punch when the first part of the contact sections is formed to form the connection area 11, there is also no bending moment acting on the adjacent helix. In this way, the helix retains its shape and its pitch, and possible short circuits between adjacent windings can also be ruled out.
  • the connecting area 10 has the shape of a segment of a circle, since the tube 2 from which the coil 1 has been produced is circular.
  • the connecting area 10 could therefore have a straight contour, for example.
  • this does not limit the shape of the connecting area 10.
  • the connecting area 10 can have any shape and contour that is the same as that of the pipe 2 in an adjacent section.
  • connection area 11 in FIG. 4 was formed by deforming the pipe wall 6 in a direction perpendicular to the longitudinal axis 3 of the pipe 2.
  • the deformation to a connection area 11 in a direction perpendicular to the longitudinal axis 3 of the tube 2 allows the connection area 11 to be formed without causing a change in length of the coil strand, be it an expansion or compression.
  • a deformation in a direction parallel to the longitudinal axis 3 would inevitably change the length of the coil strand.
  • the connection area 11 were to be formed, for example, in the direction of the longitudinal axis 3 of the tube 2 (in FIG. 4 therefore out of the illustration), a coil strand which has several such sections would be shortened due to the deformation.
  • connection area 11 is bent over perpendicular to the longitudinal axis 3 of the tube 2, a coil strand shaped in this way retains its defined overall length, despite the deformation process for the connection area 11.
  • the handling of the coil strands is improved especially in the manufacturing process, because in the process line in different
  • Manufacturing steps of the same dimensions and the associated framework conditions, such as the position of the inductive sections, can be assumed.
  • a central cut between two inductive sections can be made automatically and without further measurements.
  • connection areas 11 perpendicular to the longitudinal axis 3 of the tube 2 is that the entire coil length, especially compared to the length of the helix, can be kept short in order to achieve a better form factor for the coil 1.
  • the inductive section which is L-shaped in the exemplary embodiment shown in FIG. 4, is spaced apart from the support surface by a part of the connection region 11. In this way, the inductive section is mechanically and thermally isolated from a support surface. In this way, transfers of vibrations from the coil 1 or of heat to a support surface, which can be a printed circuit board, for example, are inhibited.
  • the distance between the inductive section 7 and a support surface ensures that sufficient space is created to completely embed the inductive section in a plastic 9.
  • the magnetic field of the coil 1, and the inductance associated therewith, is also less influenced by a spaced-apart support surface.
  • a horizontal part of the L-shaped connection area 11 shown in FIG. 4 forms a flat surface which forms a solderable connection.
  • the integral design of the coil 1 from the tube 2 makes it possible to dispense with additional connection techniques. For this reason, the coil 1 has a lower overall resistance, which in turn leads to a low power loss.
  • the thermal load is also reduced, above all at possible contacts, as a result of which the susceptibility of the coil 1 to errors is reduced.
  • FIG. 5 four coil strands are embedded in plastic 9, the longitudinal axes 3 of the coils 1 being arranged parallel to one another. Such an arrangement is also called a package.
  • the four coil strands each have four inductive sections 7 and four contact sections 8 here.
  • the package shown in FIG. 7 is only an example and more coil strands, and in particular more than 20 coil strings, with any other number of inductive sections 7 and contact sections 8 can be used.
  • the contact sections 8 are opened by recesses and then stamped into a non-deformed connection area 10 and two connection areas 11.
  • the dashed lines have several possible dividing lines 12 for isolation, which are transverse or run parallel to the longitudinal axis 3 of the coils 1 and through the contact sections 8.
  • the plastic 9 represents protection against possible dangers from the direct environment.
  • the protective function of the plastic can be expanded pragmatically by adding particles with the desired magnetic properties.
  • the inductance can also be adjusted via the amount or concentration of the magnetic particles in the plastic.
  • a coil 1 could be connected to an EP core, the EP core also integrally forming a housing.
  • the EP core could consist of two halves that can then be glued.
  • the coil 1 can be electromagnetically shielded by an EP core, in particular in the case of high-frequency applications, and the electromagnetic compatibility of the component can thus be increased.
  • a module which has a plurality of coils 1 in a housing, from a package is also possible in a simple manner.
  • a package as shown in FIG. 5, is isolated parallel and / or perpendicular to the longitudinal axis 3 of the tube 2 as required.
  • the package shown in FIG. 5 is only an example and considerably longer ones can be used Coil strings, with more coils 1, and a larger number of coil strings, can be arranged in the package.
  • the contact surfaces of a module itself can be contacted from below and, if necessary, from the side and can be contacted, for example, via soldering pads or conductor tracks via a soldering process or an adhesive process.
  • the use of a module can lead to a reduction in the cycle time when assembling the coils 1.
  • a pick-and-place machine for example, only has to position the component on a circuit board once instead of several times.
  • the coils 1 in the module can be provided to be connected to one another in parallel, in series or not at all. In one embodiment in which several coils 1 are arranged next to one another, each coil 1 can be contacted individually. If, on the other hand, such a module is contacted with two conductor tracks running perpendicular to the longitudinal axis 3, the inductive sections 7 can be electrically connected in parallel to one another. If the conductor track is laid out in a meandering shape under the module, the inductive sections 7 can be connected in series. Thus, the coils 1 themselves can be interconnected in the most varied of ways in a module, but also within an electronic device.
  • FIG. 6 shows a single coil 1 which has been embedded in plastic 9.
  • the contact section On the end face of the embedded coil 1, the contact section is arranged, which has a circular segment-shaped connecting area 10 and two L-shaped ones Connection areas 11 has.
  • the coil 1 can have been produced either by separating the coils 1 from a package or by embedding an individual coil 1, as in FIG. 4, in plastic 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Particle Accelerators (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

L'invention concerne une bobine (1) qui a un tube (2) pourvu d'une paroi (6) de tube constituée d'un matériau électriquement conducteur, tel que le tube (2) a une partie inductive (7) dans laquelle un entrefer (4) est agencé dans la paroi (6) de tube, ledit entrefer mettant en forme la paroi de tube (6) dans la partie inductive (7) pour former une hélice, et tel que le tube (2) a deux parties de contact (8) comprenant une zone connectrice (10) et au moins une zone de fixation (11), tel que la zone connectrice (10) a le même contour qu'une partie adjacente de l'hélice, et tel que la zone de fixation (11) forme une fixation électrique de la bobine (1), et tel que la zone connectrice (10) connecte électriquement la zone de fixation (11) à la partie inductive (7). D'autres aspects portent sur un module ayant une pluralité de bobines (1), sur un procédé destiné à produire une bobine (1), et sur un procédé destiné à produire un module.
EP21717067.9A 2020-04-21 2021-04-07 Bobine et procédé destiné à produire la bobine Pending EP4139944A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020110850.8A DE102020110850A1 (de) 2020-04-21 2020-04-21 Spule und Verfahren zur Herstellung der Spule
PCT/EP2021/059038 WO2021213801A1 (fr) 2020-04-21 2021-04-07 Bobine et procédé destiné à produire la bobine

Publications (1)

Publication Number Publication Date
EP4139944A1 true EP4139944A1 (fr) 2023-03-01

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Application Number Title Priority Date Filing Date
EP21717067.9A Pending EP4139944A1 (fr) 2020-04-21 2021-04-07 Bobine et procédé destiné à produire la bobine

Country Status (8)

Country Link
US (1) US20220277887A1 (fr)
EP (1) EP4139944A1 (fr)
JP (1) JP7310009B2 (fr)
KR (1) KR102617438B1 (fr)
CN (1) CN114342015A (fr)
DE (1) DE102020110850A1 (fr)
TW (1) TWI768832B (fr)
WO (1) WO2021213801A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230230753A1 (en) * 2022-01-14 2023-07-20 Coilcraft, Incorporated Electronic component and methods relating to same
DE102022110526A1 (de) 2022-04-29 2023-11-02 Tdk Electronics Ag Gekoppelter Induktor und Spannungsregler
EP4372770A1 (fr) * 2022-11-16 2024-05-22 Abb Schweiz Ag Bobine et procédé de fabrication d'une bobine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS605527Y2 (ja) * 1979-05-17 1985-02-21 株式会社東芝 静止誘導電器の巻線
JPH01266705A (ja) * 1988-04-18 1989-10-24 Sony Corp コイル部品
US5428337A (en) * 1992-02-21 1995-06-27 Vlt Corporation Conductive winding
JPH1197270A (ja) 1997-09-18 1999-04-09 Tdk Corp 平角コイルとその製造方法
JP2000323343A (ja) 1999-05-06 2000-11-24 Maruho Hatsujo Kogyo Kk 縦巻コイル及びその製造方法
KR100381361B1 (ko) * 2000-11-08 2003-04-26 주식회사 쎄라텍 표면 실장형 칩 인덕터 제조방법
US9859043B2 (en) 2008-07-11 2018-01-02 Cooper Technologies Company Magnetic components and methods of manufacturing the same
US20100277267A1 (en) 2009-05-04 2010-11-04 Robert James Bogert Magnetic components and methods of manufacturing the same
JP2013222895A (ja) 2012-04-18 2013-10-28 Murata Mfg Co Ltd コイル部品及びその製造方法
DE102012011554B4 (de) * 2012-06-11 2017-04-27 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Herstellung einer elektrotechnischen Spule
JP2016067088A (ja) * 2014-09-24 2016-04-28 東芝ライテック株式会社 電源装置及びインダクタ素子
KR102361404B1 (ko) * 2015-10-20 2022-02-10 에이치엔에스파워텍 주식회사 적층형 파워인덕터
WO2018159333A1 (fr) 2017-02-28 2018-09-07 日本電産リード株式会社 Composant électronique enroulé, composant de bobine, procédé de fabrication de composant de bobine, élément d'inductance, filtre de type t, circuit oscillant et procédé de fabrication d'élément d'inductance
US10923322B2 (en) * 2017-06-14 2021-02-16 Lam Research Corporation Articulated direct-mount inductor and associated systems and methods
JP7225484B2 (ja) 2018-06-04 2023-02-21 福井県 電気機器用コイルの製造方法
DE102019103895A1 (de) 2019-02-15 2020-08-20 Tdk Electronics Ag Spule und Verfahren zur Herstellung der Spule

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JP7310009B2 (ja) 2023-07-18
US20220277887A1 (en) 2022-09-01
DE102020110850A1 (de) 2021-10-21
JP2022545892A (ja) 2022-11-01
KR102617438B1 (ko) 2023-12-27
WO2021213801A1 (fr) 2021-10-28
TW202147358A (zh) 2021-12-16
TWI768832B (zh) 2022-06-21
KR20220035464A (ko) 2022-03-22
CN114342015A (zh) 2022-04-12

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