CA2171700A1 - Magnetic and/or magnetizable winding carrier and method of producing the same - Google Patents
Magnetic and/or magnetizable winding carrier and method of producing the sameInfo
- Publication number
- CA2171700A1 CA2171700A1 CA002171700A CA2171700A CA2171700A1 CA 2171700 A1 CA2171700 A1 CA 2171700A1 CA 002171700 A CA002171700 A CA 002171700A CA 2171700 A CA2171700 A CA 2171700A CA 2171700 A1 CA2171700 A1 CA 2171700A1
- Authority
- CA
- Canada
- Prior art keywords
- magnetic
- winding carrier
- magnetizable
- coil
- coil body
- 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.)
- Abandoned
Links
- 238000004804 winding Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000001746 injection moulding Methods 0.000 claims abstract description 6
- 239000000696 magnetic material Substances 0.000 claims abstract description 5
- 239000002131 composite material Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 239000000969 carrier Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/045—Fixed inductances of the signal type with magnetic core with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/08—Cores, Yokes, or armatures made from powder
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
- Electromagnets (AREA)
- Insulating Of Coils (AREA)
- Pens And Brushes (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
A magnetic and/or magnetizable winding carrier for a coil includes a coil body and an open core of magnetic material and/or magnetizable material. The coil body and the core are constructed in one piece. A method of producing the winding carrier includes injection molding the winding carrier.
Description
GR 95 P 1203 217170~
MAGNETIC AND/OR MAGNETIZABLE WINDING CARRIER
AND METHOD OF PRODUCING THE SAME
s Background of the Invention:
Field of the Invention:
The invention relates to a magnetic and/or magnetizable winding carrier for a coil, including a coil body and an open core of a magnetic and/or magnetizable material. The invention also relates to a method of producing the winding carrier.
In applications with open cores (and in the case of closed cores as well), a coil winding is wound onto a plastic body, that is the coil body, which is then slipped onto the core. Next, the coil which is thus produced is potted, in order to fix and protect the components. If it is critical that a certain inductance or distribution of the magnetic external field be adhered to during use, then that requires precise positioning of the winding with respect to the core. In short coils, that geometrical influence even predominates over the influence of fluctuations in the permeability of the material. In practice, the geometrical fluctuations occur as a result of mechanical tolerances in the manufacture of the core -and the coil body, both in the winding process and when the components are being assembled.
Summary of the Invention:
It is accordingly an object of the invention to provide a magnetic and/or magnetizable winding carrier and a method of producing the winding carrier, which overcome the hereinafore-mentioned disadvantages of the heretofore-known devices and methods of this general type and in which the difficulties discussed above are maximally eliminated in terms of geometrical factors.
With the foregoing and other objects in view there is provided, in accordance with the invention, a magnetic and/or magnetizable winding carrier for a coil, comprising a coil body and an open core of magnetic material and/or magnetizable material; the coil body and the core being constructed in one piece.
This has the advantage of permitting the coil winding to be positioned in a defined way with respect to the core.
In accordance with another feature of the invention, the winding carrier is at least partially formed of an FPC
(ferrite-polymer composite).
In accordance with a further feature of the invention, the winding carrier may either be formed entirely as a single component, namely the FPC, or may have at least two different components.
In accordance with an added feature of the invention, the winding carrier is produced by injection molding.
With the objects of the invention view there is also provided a method of producing a magnetic and/or magnetizable winding carrier for a coil, which comprises injection molding a coil body and an open core in one piece from magnetic material and/or magnetizable material.
Other features which are considered as characteristic for the invention are set forth in the appended claims.
Although the invention is illustrated and described herein as embodied in a magnetic and/or magnetizable winding carrier, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the clalms .
The construction and method of operation of the invention, however, together with additional objects and advantages thereof will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
Brief Description of the Drawings:
Fig. 1 is a longitudinal-sectional view of a winding carrier; and Figs. 2 and 3 are diagrams showing a course of a magnetic field intensity of coils having the winding carrier of the invention, in comparison with conventional coils that have a split winding carrier.
Description of the Preferred Embodiments:
Referring now to the figures of the drawings in detail and first, particularly, to Fig. 1 thereof, there is seen a sectional view of a winding carrier 1. The winding carrier 1 is shaped in such a way that it has two protrusions 2, 3, which enclose a chamber 4 in which a coil winding is accommodated. The winding carrier 1 is formed with a coil that is integrated with the core, so that the winding can be applied directly, and therefore the influence of mechanical tolerances of separate components on the constancy of magnetic functions is 217 1 70~ GR 95 P 1203 eliminated. The production of the winding carrier 1 includes a simultaneous production of the core and coil body, preferably by the known process of injection molding.
Advantageously, the winding carrier 1 is made in a single component, for instance of FPC, but it can also include at least two different components, which are either all magnetic or magnetizable, but at least one of which may also be formed of an electrically insulating, nonmagnetic material.
In conventional, two-piece winding carriers, one of the protrusions 2 or 3 is of nonmagnetic material, because that protrusion is part of the coil body. Actually one should accordingly expect that the magnetic field distribution around a coil made with the winding carrier of the invention would be less favorable than in conventional, two-piece winding carriers, because by forming two protrusions with magnetic or magnetizable material, concentration of the magnetic field lines and attenuation of the magnetic field could be expected.
Surprisingly, however, it has been found that with a one-piece winding carrier according to the invention, the 21 71 70~ GR 95 P 1203 field intensity distribution in its surroundings is more favorable than in conventional winding carriers.
Figs. 2 and 3 show an intensity of a magnetic field Bz (T) for a case in which a coil is mounted around a metal cylinder. Fig. 2 relates to a measurement radius r of 5 mm, while Fig. 3 is based on a measurement radius r of 15 mm. Curves A are for a conventional coil with a winding applied to a coil body and with an open core, while curves B are for coils that are made with a winding carrier according to the invention.
It can be seen from Figs. 2 and 3 that surprisingly, in the surroundings of the coil having a winding carrier lS according to the invention, higher field intensities are attained than with conventionally produced coils.
This is especially valuable if energy transmissions are to be made with the aid of the magnetic field, such as in applications meant to be operated without a battery, for instance driveaway blocks in motor vehicles.
MAGNETIC AND/OR MAGNETIZABLE WINDING CARRIER
AND METHOD OF PRODUCING THE SAME
s Background of the Invention:
Field of the Invention:
The invention relates to a magnetic and/or magnetizable winding carrier for a coil, including a coil body and an open core of a magnetic and/or magnetizable material. The invention also relates to a method of producing the winding carrier.
In applications with open cores (and in the case of closed cores as well), a coil winding is wound onto a plastic body, that is the coil body, which is then slipped onto the core. Next, the coil which is thus produced is potted, in order to fix and protect the components. If it is critical that a certain inductance or distribution of the magnetic external field be adhered to during use, then that requires precise positioning of the winding with respect to the core. In short coils, that geometrical influence even predominates over the influence of fluctuations in the permeability of the material. In practice, the geometrical fluctuations occur as a result of mechanical tolerances in the manufacture of the core -and the coil body, both in the winding process and when the components are being assembled.
Summary of the Invention:
It is accordingly an object of the invention to provide a magnetic and/or magnetizable winding carrier and a method of producing the winding carrier, which overcome the hereinafore-mentioned disadvantages of the heretofore-known devices and methods of this general type and in which the difficulties discussed above are maximally eliminated in terms of geometrical factors.
With the foregoing and other objects in view there is provided, in accordance with the invention, a magnetic and/or magnetizable winding carrier for a coil, comprising a coil body and an open core of magnetic material and/or magnetizable material; the coil body and the core being constructed in one piece.
This has the advantage of permitting the coil winding to be positioned in a defined way with respect to the core.
In accordance with another feature of the invention, the winding carrier is at least partially formed of an FPC
(ferrite-polymer composite).
In accordance with a further feature of the invention, the winding carrier may either be formed entirely as a single component, namely the FPC, or may have at least two different components.
In accordance with an added feature of the invention, the winding carrier is produced by injection molding.
With the objects of the invention view there is also provided a method of producing a magnetic and/or magnetizable winding carrier for a coil, which comprises injection molding a coil body and an open core in one piece from magnetic material and/or magnetizable material.
Other features which are considered as characteristic for the invention are set forth in the appended claims.
Although the invention is illustrated and described herein as embodied in a magnetic and/or magnetizable winding carrier, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the clalms .
The construction and method of operation of the invention, however, together with additional objects and advantages thereof will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
Brief Description of the Drawings:
Fig. 1 is a longitudinal-sectional view of a winding carrier; and Figs. 2 and 3 are diagrams showing a course of a magnetic field intensity of coils having the winding carrier of the invention, in comparison with conventional coils that have a split winding carrier.
Description of the Preferred Embodiments:
Referring now to the figures of the drawings in detail and first, particularly, to Fig. 1 thereof, there is seen a sectional view of a winding carrier 1. The winding carrier 1 is shaped in such a way that it has two protrusions 2, 3, which enclose a chamber 4 in which a coil winding is accommodated. The winding carrier 1 is formed with a coil that is integrated with the core, so that the winding can be applied directly, and therefore the influence of mechanical tolerances of separate components on the constancy of magnetic functions is 217 1 70~ GR 95 P 1203 eliminated. The production of the winding carrier 1 includes a simultaneous production of the core and coil body, preferably by the known process of injection molding.
Advantageously, the winding carrier 1 is made in a single component, for instance of FPC, but it can also include at least two different components, which are either all magnetic or magnetizable, but at least one of which may also be formed of an electrically insulating, nonmagnetic material.
In conventional, two-piece winding carriers, one of the protrusions 2 or 3 is of nonmagnetic material, because that protrusion is part of the coil body. Actually one should accordingly expect that the magnetic field distribution around a coil made with the winding carrier of the invention would be less favorable than in conventional, two-piece winding carriers, because by forming two protrusions with magnetic or magnetizable material, concentration of the magnetic field lines and attenuation of the magnetic field could be expected.
Surprisingly, however, it has been found that with a one-piece winding carrier according to the invention, the 21 71 70~ GR 95 P 1203 field intensity distribution in its surroundings is more favorable than in conventional winding carriers.
Figs. 2 and 3 show an intensity of a magnetic field Bz (T) for a case in which a coil is mounted around a metal cylinder. Fig. 2 relates to a measurement radius r of 5 mm, while Fig. 3 is based on a measurement radius r of 15 mm. Curves A are for a conventional coil with a winding applied to a coil body and with an open core, while curves B are for coils that are made with a winding carrier according to the invention.
It can be seen from Figs. 2 and 3 that surprisingly, in the surroundings of the coil having a winding carrier lS according to the invention, higher field intensities are attained than with conventionally produced coils.
This is especially valuable if energy transmissions are to be made with the aid of the magnetic field, such as in applications meant to be operated without a battery, for instance driveaway blocks in motor vehicles.
Claims (6)
1. A magnetic and/or magnetizable winding carrier for a coil, comprising:
a coil body and an open core of at least one material selected from the group consisting of magnetic material and magnetizable material;
said coil body and said core being constructed in one piece.
a coil body and an open core of at least one material selected from the group consisting of magnetic material and magnetizable material;
said coil body and said core being constructed in one piece.
2. The magnetic winding carrier according to claim 1, wherein said coil body and said open core are at least partially formed of an FPC (ferrite-polymer composite).
3. The magnetic winding carrier according to claim 2, wherein said coil body and said open core are formed of a single component.
4. The magnetic winding carrier according to claim 2, wherein said coil body and said open core are formed of at least two different components.
5. The magnetic winding carrier according to claim 1, wherein said coil body and said open core are made by injection molding.
6. A method of producing a magnetic and/or magnetizable winding carrier for a coil, which comprises:
injection molding a coil body and an open core in one piece from at least one material selected from the group consisting of magnetic material and magnetizable material.
injection molding a coil body and an open core in one piece from at least one material selected from the group consisting of magnetic material and magnetizable material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19509264A DE19509264A1 (en) | 1995-03-15 | 1995-03-15 | Magnetic and / or magnetizable winding carrier |
| DE19509264.3 | 1995-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2171700A1 true CA2171700A1 (en) | 1996-09-16 |
Family
ID=7756670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002171700A Abandoned CA2171700A1 (en) | 1995-03-15 | 1996-03-13 | Magnetic and/or magnetizable winding carrier and method of producing the same |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0732708A3 (en) |
| JP (1) | JPH08264315A (en) |
| KR (1) | KR960035676A (en) |
| AU (1) | AU4810096A (en) |
| CA (1) | CA2171700A1 (en) |
| DE (1) | DE19509264A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11870307B2 (en) | 2019-06-19 | 2024-01-09 | Universität Stuttgart | Method for increasing the efficiency of an energy transfer device, energy transfer device, and use of an electrically conductive material |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10139446B4 (en) * | 2001-08-10 | 2021-05-20 | Conti Temic Microelectronic Gmbh | Bobbin |
| DE102010044812B4 (en) * | 2010-09-09 | 2012-11-29 | Eto Magnetic Gmbh | A method of manufacturing an electromagnetic actuator and an electromagnetic actuator manufactured thereby |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1762544A (en) * | 1928-07-16 | 1930-06-10 | Warner Electric Brake Corp | Magnet construction |
| US2648124A (en) * | 1947-08-09 | 1953-08-11 | Duyck Georges | Method of manufacturing electromagnets |
| CH621428A5 (en) * | 1977-12-15 | 1981-01-30 | Sulzer Ag | |
| US4543208A (en) * | 1982-12-27 | 1985-09-24 | Tokyo Shibaura Denki Kabushiki Kaisha | Magnetic core and method of producing the same |
| JPH062251Y2 (en) * | 1990-05-11 | 1994-01-19 | 東光株式会社 | Bobbin for multiple inductors |
| JPH0437104A (en) * | 1990-06-01 | 1992-02-07 | Tokin Corp | Ferrite core for rotary transformer and manufacture thereof |
| JPH04297007A (en) * | 1991-03-26 | 1992-10-21 | Sony Corp | Coil bobbin and coil base |
| TW252206B (en) * | 1993-09-01 | 1995-07-21 | Philips Electronics Nv |
-
1995
- 1995-03-15 DE DE19509264A patent/DE19509264A1/en not_active Withdrawn
-
1996
- 1996-03-04 EP EP96103352A patent/EP0732708A3/en not_active Withdrawn
- 1996-03-08 JP JP8080925A patent/JPH08264315A/en active Pending
- 1996-03-13 CA CA002171700A patent/CA2171700A1/en not_active Abandoned
- 1996-03-14 AU AU48100/96A patent/AU4810096A/en not_active Abandoned
- 1996-03-15 KR KR1019960006937A patent/KR960035676A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11870307B2 (en) | 2019-06-19 | 2024-01-09 | Universität Stuttgart | Method for increasing the efficiency of an energy transfer device, energy transfer device, and use of an electrically conductive material |
Also Published As
| Publication number | Publication date |
|---|---|
| KR960035676A (en) | 1996-10-24 |
| DE19509264A1 (en) | 1996-09-19 |
| JPH08264315A (en) | 1996-10-11 |
| AU4810096A (en) | 1996-09-26 |
| EP0732708A3 (en) | 1996-09-25 |
| EP0732708A2 (en) | 1996-09-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |