EP3665709A1 - Verfahren zum magnetisieren von mindestens zwei magneten unterschiedlicher magnetischer koerzitivfeldstärken - Google Patents
Verfahren zum magnetisieren von mindestens zwei magneten unterschiedlicher magnetischer koerzitivfeldstärkenInfo
- Publication number
- EP3665709A1 EP3665709A1 EP18749830.8A EP18749830A EP3665709A1 EP 3665709 A1 EP3665709 A1 EP 3665709A1 EP 18749830 A EP18749830 A EP 18749830A EP 3665709 A1 EP3665709 A1 EP 3665709A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnets
- magnetic field
- magnetic
- magnetization
- field strength
- 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- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/003—Methods and devices for magnetising permanent magnets
Definitions
- the invention relates to a method for magnetizing at least two magnets of different magnetic coercive field strengths.
- polarized electromagnetic relay which may each have a magnetic system with a coil, a magnetic core and two permanent magnets.
- polarized electromagnetic relay is known for example from WO 2013/144232 AI.
- the present invention has for its object to provide a method with which at least two magnets can be magnetized differently in a simple manner, quickly, flexibly and inexpensively.
- the magnets are preferably together in one
- Magnetizing device comprising, for example, a magnetizing coil, arranged before being magnetized according to the invention.
- the magnets magnetized in this way can be used in particular as permanent magnets in an electromagnetic relay. It should be noted that the at least two magnets may initially be unmagnetized or arbitrarily biased before being exposed to the first magnetic field. The above technical problem is explained by the method steps of
- a method for magnetizing at least two magnets of different magnetic coercive field strength which has the following method steps: a) Simultaneous exposure of the at least two magnets to a first im
- Substantially homogeneous magnetic field having a predeterminable first field strength and a first magnetic field direction for completely magnetizing the magnets in the first magnetic field direction;
- step b) Simultaneous exposure of the magnets magnetized in step a) to a second substantially homogeneous magnetic field having a predeterminable second field strength and a second, opposite to the first magnetic field direction
- Magnetic field direction such that the at least two magnets are magnetized differently, wherein the first field strength is higher than the second field strength.
- the at least two magnets may initially be unmagnetized or biased before being exposed to the first and then the second magnetic field.
- the bias can be done in a predetermined manner or arbitrarily. In other words, the amount of bias can be predetermined or arbitrary.
- the term “fully magnetizing” means that the magnets are magnetized to magnetic saturation, and before carrying out steps a) and b) it is expedient to arrange the at least two magnets in a magnetizing device, the first and second magnets being magnetized second magnetic field is provided by the magnetizing device.
- the first and second are homogeneous
- Magnetic field in an interior of the magnetization device in which the Mag are arranged generates.
- the magnetizing device may comprise a magnetizing coil, one with the
- Magnetization coil electrically connected means for generating an adjustable excitation current, in particular a pulse magnetization device, and optionally a carrier assembly for receiving and holding the magnets.
- the predeterminable second field strength of the second magnetic field can be adjusted such that the at least two magnets are magnetized in opposite directions, the magnet having the higher coercive magnetic field in the first magnetic field direction and the lower coercive field magnet in the second magnetic field direction is magnetized.
- Figure 1 shows a longitudinal section of a polarized electromagnetic relay
- Figure 2 is a longitudinal section of the polarized relay arranged, the two
- Magnets contained assembly 3a shows a perspective view of a magnetization device with a carrier assembly in which the assembly shown in FIG. 2 can be arranged,
- FIG. 3b a plan view of the magnetization device shown in FIG. 3a,
- Figure 3c is a perspective view of that shown in Fig. 3a
- FIG. 4 shows the magnetization curves of the two shown in FIG. 1 and FIG.
- FIG. 6 shows the magnetization curves shown in FIG.
- FIG. 7 shows the magnetization curves shown in FIG.
- FIG. 2 shows two magnets 20 and 22 with different magnetic coercive field strengths, which may be parts of an assembly 10, for example.
- the magnets 20 and 22 may for example be unmagnetized or arbitrarily biased and each made of a ferromagnetic material.
- the magnet 20 has a higher magnetic coercive force
- the higher magnetic coercive force magnet 20 is an SmCo magnet
- the lower coercive magnetic force magnet 22 may be a ferrite magnet.
- more than two magnets can be used.
- the assembly 10 preferably has a carrier component 50, which may have a U-shaped cross-section.
- the carrier component 50 has two opposite wall sections 51 and 52 and a bottom section 53 connecting the two wall sections.
- the two magnets 20 and 22 can be arranged directly next to each other, they are in the example shown between magnetic flux parts 30, 31 and 32 and thus arranged spatially separated from each other.
- the two magnets 20 and 22 are arranged parallel to a longitudinal axis 11 of the assembly 10 extending in the x-direction and with respect to the longitudinal axis 11 one behind the other.
- the magnetic flux part 31 forms a bearing piece for a rocker arm, not shown, while the two magnetic flux parts 30 and 32 form the poles of an electromagnet.
- the magnetic flux parts 30, 31 and 32 and the two magnets 20 and 22 are carried by a support plate 40.
- the magnetic flux parts 30 to 32, the magnets 20 and 22 and the support plate 40 are arranged above the bottom portion 53 between the two wall portions 51 and 52 and
- With the support member 50 include a Coordinathahme Suite 110, in which components of a magnet system can be arranged, as shown by way of example in Fig. 1 by means of a polarized electromagnetic relay.
- the magnetic system shown by way of example in FIG. 1 has inter alia a rocker armature 12, a ferromagnetic core 2, a coil and pole shoes 3.
- the two magnets 20 and 22 can also be assigned to the magnet system.
- connection pin 71 for example, as a load terminal pinshakengiert and the pin 70th is provided for electrically connecting a fixed contact of a poled electromagnetic relay shown by way of example in FIG.
- the polarized relay shown in Fig. 1 is described in detail in WO 2013/144232 Al, the contents of which are hereby fully incorporated.
- the two magnets 20 and 22 which have different magnetic coercive field strengths and may initially be unmagnetized or arbitrarily biased, in a predeterminable two-stage Way magnetized. For better transport, the magnets are pre-magnetized in practice.
- the entire assembly 10 is first in a
- Magnetizing device 80 is arranged, as shown by way of example in Figure 3a i. V. m. 3d is shown.
- the magnetization device 80 may comprise an exemplary magnetization coil 60 shown in FIG. 3d, to which an adjustable current source (not shown) may be connected to provide the required excitation currents.
- the current source may be part of a pulse magnetization device, which is designed to generate pulse-like currents.
- the pulse magnetization device can be assigned to the magnetization device 80.
- the magnetization coil 60 is preferably formed as an air-core coil having a cylindrical coil interior 62 into which the assembly 10 can be inserted and positioned, as shown in FIG. 3d.
- the magnetizing device 80 may further include a
- Carrier assembly 70 which includes a housing 75 having an opening 73 whose longitudinal axis extends in the z-direction. The one shown in Fig. 3d
- Magnetizing coil 60 is arranged in the housing 75 so that the opening 73 is arranged in alignment with the coil interior 62.
- the coil axis 61 extends in the z-direction and coincides with the longitudinal axis of the opening 73 of the
- the carrier assembly 70 may include a mounting means or retainer 90 releasably securable to the housing 75 for holding and positioning the magnets 20 and 22 or for holding and positioning the assembly 10 within the magnetization coil 60 is formed.
- Mounting device 90 may, as FIG. 3 shows, T-shaped and a horizontally extending portion 91 and a perpendicular thereto
- the horizontal portion 91 has a length larger than the diameter of the opening 73 of the housing 75.
- the mounting device 90 can be releasably screwed to the housing 75 by means of the horizontal section 91, for example. In this way, the mounting device 90 and thus the assembly 10 can be precisely positioned and fixed in the coil interior 62.
- This mounting state is also in Figure 3a i. V. m. Fig. 3d shown, wherein in Fig. 3 a, the magnetizing coil 60 is covered by the housing 75.
- the magnetization coil 60 arranged in the housing 75 completely encloses the inserted assembly 10 and thus the two magnets 20 and 22 in the installed state, as shown in FIG. 3d.
- the assembly 10 is arranged within the magnetization coil 60 such that the longitudinal axis 11 of the assembly 10 is parallel to the z-direction extending longitudinal axis 61 of the magnetization coil 60 and that the two magnets 20 and 22 advantageously on the longitudinal axis of the inner space 62 of the magnetization coil 60th , So are arranged in the center of the interior 62.
- the two magnets 20 and 22 are arranged one behind the other in the magnetization coil 60 with respect to the longitudinal axis 61.
- the current source (not shown) can provide a first adjustable exciting current, which in the interior 62 of the
- Magnetizing coil 60 may cause a first, substantially homogeneous magnetic field with a predeterminable field strength, which has a first, pointing in the positive z direction magnetic field direction.
- the power source may also provide a second adjustable excitation current, which in the interior 62 of the
- Magnetization coil 60 can cause a second, substantially homogeneous magnetic field with predeterminable field strength, which a second, in negative z Direction pointing magnetic field direction has. It should be noted at this point that the field strength of the first magnetic field is greater than the field strength of the second magnetic field. It should also be noted that the first exciting current can be, for example, 1000 to 5000 A, while the second exciting current is set to 200 A, for example.
- the assembly 10 with the two magnets 20 and 22, which may be unmagnetized or arbitrarily biased, is arranged in the carrier assembly 80 and thus in the magnetization coil 60, as shown by way of example in FIGS. 3 a to 3 c.
- Fig. 4 is initially considered, in the example of two different
- Magnetization curves a) and b), also called hysteresis curves, are shown before the first magnetization of the magnets 20 and 22, wherein the magnetization curve a) belongs to the magnet 20 with higher magnetic coercive force, while the magnetization curve b) is associated with the magnet 22 with lower coercive force is.
- a magnetization curve graphically represents the
- FIG. 4 Dependence of the field line density B on the magnetic field strength H.
- the magnetic field strength H is plotted in a manner known per se, and the flux density B is plotted on the y axis.
- the two still unmagnetized or arbitrarily biased magnets 20 and 22 are shown schematically next to each other, although they, as shown in Fig. 2, may also be arranged spaced apart by the magnetic flux member 31. For the operation of the method, this is irrelevant. Now, Fig. 5 is considered.
- a predeterminable first exciter current is fed into the magnetization coil 60 in a first direction, which in the inner space 62 of the magnetization coil 60 is a first substantially homogeneous one Magnetic field predeterminable field strength in a first magnetic field direction, for example, in the positive z-direction causes, as symbolized by the arrow pointing to the right.
- the two magnets 20 and 22 are simultaneously exposed to the first magnetic field for complete magnetization in the first direction.
- the magnetization state of the two magnets 20 and 22 after the first magnetization is shown in FIG. Both magnets 20 and 22 are in the positive z-direction, see Fig. 3c, fully magnetized.
- Reference numerals 1 represent the respective flux density in the magnets.
- Magnetizing coil 60 is fed in the interior 62 of the
- Magnetizing coil 60 a second substantially homogeneous magnetic field of predeterminable field strength in a second, the first magnetic field direction
- Exciting current are preferably direct currents, which flow through the magnetization coil 60 in a pulse-like manner for an adjustable time.
- the field strength of the second magnetic field is lower than the field strength of the first magnetic field.
- the field strength of the second magnetic field is selected such that the magnet 22 with smaller
- Magnet 20 is not weakened with higher coercive force.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE2017/5552A BE1025465B1 (de) | 2017-08-11 | 2017-08-11 | Verfahren zum Magnetisieren von mindestens zwei Magneten unterschiedlicher magnetischer Koerzitivfeldstärken |
| PCT/EP2018/071813 WO2019030399A1 (de) | 2017-08-11 | 2018-08-10 | Verfahren zum magnetisieren von mindestens zwei magneten unterschiedlicher magnetischer koerzitivfeldstärken |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3665709A1 true EP3665709A1 (de) | 2020-06-17 |
Family
ID=59738076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18749830.8A Withdrawn EP3665709A1 (de) | 2017-08-11 | 2018-08-10 | Verfahren zum magnetisieren von mindestens zwei magneten unterschiedlicher magnetischer koerzitivfeldstärken |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US11177063B2 (de) |
| EP (1) | EP3665709A1 (de) |
| JP (1) | JP6911193B2 (de) |
| CN (1) | CN110998763B (de) |
| BE (1) | BE1025465B1 (de) |
| WO (1) | WO2019030399A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019210177B4 (de) * | 2019-07-10 | 2021-05-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zum Herstellen einer gegenläufig magnetisierten Magnetstruktur |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1564315A1 (de) * | 1966-03-25 | 1969-09-25 | Magnetfab Bonn Gmbh | Aus mehreren Dauermagneten zusammengesetztes Magnetsystem und Verfahren zu seiner Magnetisierung |
Family Cites Families (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2148377B2 (de) | 1971-09-28 | 1973-09-20 | Siemens Ag, 1000 Berlin U. 8000 Muenchen | Gepoltes Miniaturrelais |
| DE2632126C2 (de) | 1976-07-16 | 1978-05-24 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Polarisiertes Miniaturrelais |
| JPS57202712A (en) * | 1981-06-08 | 1982-12-11 | Tohoku Metal Ind Ltd | Magnetization of permanent magnet |
| JPS61218035A (ja) | 1985-03-25 | 1986-09-27 | 松下電工株式会社 | 有極電磁石 |
| DE3528090C1 (de) | 1985-08-05 | 1986-10-23 | SDS-Relais AG, 8024 Deisenhofen | Elektromagnetisches Relais |
| JPS6293916A (ja) * | 1985-10-19 | 1987-04-30 | Tohoku Metal Ind Ltd | 永久磁石の着磁方法 |
| AT388467B (de) | 1987-08-27 | 1989-06-26 | Schrack Elektronik Ag | Relaisantrieb fuer ein polarisiertes relais |
| JPH0487308A (ja) * | 1990-07-31 | 1992-03-19 | Sankyo Seiki Mfg Co Ltd | 希土類ボンド磁石の着磁方法 |
| WO2001048778A1 (en) | 1999-12-24 | 2001-07-05 | Takamisawa Electric Co., Ltd. | Polar relay |
| US20050092395A1 (en) * | 2002-02-15 | 2005-05-05 | Masaaki Aoki | Magnetic field generator and its manufacturing method |
| DE10251566A1 (de) * | 2002-11-06 | 2004-05-27 | Robert Bosch Gmbh | Verfahren zur Herstellung einer magnetoresistiven Schichtanordnung oder eines Sensorelementes oder Speicherelementes damit, sowie GMR-Sensorbauelement oder GMR-Speicherbauelement |
| CN1862718B (zh) * | 2005-05-09 | 2011-06-08 | 中国科学院电工研究所 | 一种对极永磁磁体 |
| DE102009039588A1 (de) * | 2009-09-01 | 2011-03-03 | Giesecke & Devrient Gmbh | Verfahren und Vorrichtung zur Prüfung von Wertdokumenten |
| US8493062B2 (en) * | 2010-03-15 | 2013-07-23 | Toyota Jidosha Kabushiki Kaisha | Method for determining coercivity of coercivity distribution magnet |
| CN102939620B (zh) * | 2010-06-09 | 2015-06-03 | 德国捷德有限公司 | 用于检查有价文件的方法和设备 |
| DE102011109949A1 (de) * | 2011-08-10 | 2013-02-14 | Giesecke & Devrient Gmbh | Prüfanordnung zur Wertdokumentprüfung |
| DE102011120972A1 (de) * | 2011-12-13 | 2013-06-13 | Giesecke & Devrient Gmbh | Verfahren und Vorrichtung zur Prüfung von Wertdokumenten |
| DE102012006436B4 (de) * | 2012-03-30 | 2020-01-30 | Phoenix Contact Gmbh & Co. Kg | Gepoltes elektromagnetisches Relais und Verfahren zu seiner Herstellung |
| DE102012006438A1 (de) | 2012-03-30 | 2013-10-02 | Phoenix Contact Gmbh & Co. Kg | Relais mit zwei gegensinnig betätigbaren Schaltern |
| EP2977754A4 (de) | 2013-03-22 | 2016-12-21 | Glory Kogyo Kk | Vorrichtung für den nachweis von magnetischen eigenschaften |
| TWI501263B (zh) * | 2013-09-06 | 2015-09-21 | Metal Ind Res &Development Ct | Magnetizing equipment and magnetizing method |
| US9224529B2 (en) * | 2013-09-30 | 2015-12-29 | Apple Inc. | Multi-pole magnetization of a magnet |
| JP6464552B2 (ja) * | 2013-10-04 | 2019-02-06 | 大同特殊鋼株式会社 | RFeB系磁石及びその製造方法 |
| US9349516B2 (en) * | 2014-02-13 | 2016-05-24 | Siemens Energy, Inc. | Multidirectional magnetic particle inspection system |
| CN104021912B (zh) * | 2014-06-17 | 2016-03-23 | 上海雷尼威尔技术有限公司 | 一种双码道充磁的充磁设备以及充磁方法 |
| US10121581B2 (en) * | 2014-09-29 | 2018-11-06 | Apple Inc. | Method for magnetizing multiple zones in a monolithic piece of magnetic material |
| JP6792323B2 (ja) * | 2015-05-14 | 2020-11-25 | 株式会社豊田中央研究所 | 磁石を用いた係合システムの着磁制御方法 |
| US10605774B2 (en) * | 2015-09-17 | 2020-03-31 | Apple Inc. | Magnetic imaging |
-
2017
- 2017-08-11 BE BE2017/5552A patent/BE1025465B1/de active IP Right Grant
-
2018
- 2018-08-10 US US16/638,092 patent/US11177063B2/en active Active
- 2018-08-10 WO PCT/EP2018/071813 patent/WO2019030399A1/de not_active Ceased
- 2018-08-10 CN CN201880051865.7A patent/CN110998763B/zh active Active
- 2018-08-10 JP JP2020504372A patent/JP6911193B2/ja active Active
- 2018-08-10 EP EP18749830.8A patent/EP3665709A1/de not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1564315A1 (de) * | 1966-03-25 | 1969-09-25 | Magnetfab Bonn Gmbh | Aus mehreren Dauermagneten zusammengesetztes Magnetsystem und Verfahren zu seiner Magnetisierung |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6911193B2 (ja) | 2021-07-28 |
| JP2020529135A (ja) | 2020-10-01 |
| CN110998763A (zh) | 2020-04-10 |
| CN110998763B (zh) | 2021-12-24 |
| US11177063B2 (en) | 2021-11-16 |
| BE1025465B1 (de) | 2019-03-11 |
| WO2019030399A1 (de) | 2019-02-14 |
| US20200211747A1 (en) | 2020-07-02 |
| BE1025465A1 (de) | 2019-03-06 |
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