CN100369166C - Convergent oscillation type demagnetization device - Google Patents
Convergent oscillation type demagnetization device Download PDFInfo
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- CN100369166C CN100369166C CNB2005100098119A CN200510009811A CN100369166C CN 100369166 C CN100369166 C CN 100369166C CN B2005100098119 A CNB2005100098119 A CN B2005100098119A CN 200510009811 A CN200510009811 A CN 200510009811A CN 100369166 C CN100369166 C CN 100369166C
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- magnetic field
- demagnetization device
- mutual inductor
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Abstract
The present invention discloses a convergent oscillation type demagnetization device which relates to the technical field of demagnetization and comprises an impulse type power supply 1, a mutual coil 2 and a capacitor 3, wherein the mutual coil 2 is a hollow mutual coil formed by winding a coil 2-1 and a coil 2-2; both ends of the coil 2-2 are respectively connected with both ends of the capacitor, and both end of the coil 2-1 are respectively connected with two output ends of the impulse type power supply 1. The present invention can obtain a demagnetizing field with sufficient wave number and decrement rate to make permanent magnets completely demagnetized; the oscillation of the demagnetization device is generated in a secondary loop, and an ideal free damping oscillation magnetic field can be obtained without the influence of the large capacity of the storage capacitor. The demagnetization device has the advantages of simple structure, easy use and easy maintenance.
Description
Technical field:
What the present invention relates to is the demagnetization technology field, specifically is a kind of convergent oscillation type demagnetization device.
Background technology:
Existing pulsed magnetising or demagnetising apparatus is that the field coil anchor clamps by the pulse power and solenoid coil or other structure constitute.The electric current that magnetizes by being provided by the pulse power when being used to magnetize produces magnetic field permanent magnetic material is magnetized in the field coil anchor clamps of solenoid coil or other structure; Direction by Control current when being used to demagnetize produces positive and negative alternating magnetic fields permanent magnetic material is demagnetized in solenoid coil.Demagnetization be by the electronic switch Control current one by one positive and negative alternate and reducing the gradually demagnetizing field that obtains positive and negative alternation amount of decrease permanent magnetic material is demagnetized.This process is very long and can not make permanent magnetic material be returned to magnetic neutral state fully, and is special more undesirable for the rare earth permanent-magnetic material of all kinds of high-coercive forces.Utilize the composite electron switch also can obtain decay magnetic field by forming the RLC attenuated oscillation by the resistance R in storage capacitor C, solenoid coil L and the loop in the capacitor discharge loop, but because storage capacitor is generally all very big, cause loop Q value low, be difficult to change the road in the discharge process and form desirable RLC free oscillation parameter, can't obtain the enough wave numbers and the demagnetizing field of lapse rate.
Summary of the invention:
The objective of the invention is the pulsed discharge loop power to be delivered to the secondary loop by the mutual inductance coupled modes, in the secondary loop, form free convergent oscillation electric current, in flowing through the field coil of this electric current, produce the convergent oscillation type demagnetization device in convergent oscillation magnetic field simultaneously.The present invention can solve the problem that can not obtain enough wave numbers and lapse rate demagnetizing field when existing demagnetizer demagnetizes.It comprises pulsed power supplies 1, and it also comprises mutual inductor 2, capacitor 3; Mutual inductor 2 is the hollow mutual inductors that formed by the first coil 2-1, the common coiling of the second coil 2-2; The first and last end of the second coil 2-2 connects the two ends of capacitor 3 respectively, and the first and last end of the first coil 2-1 connects two outputs of pulsed power supplies 1 respectively.Operation principle: momentary pulse electric current among the first coil 2-1 that front end pulsed power supplies 1 is delivered in the mutual inductor 2 when demagnetization, the variation magnetic flux that this pulse current produces in the first coil 2-1 produces induced electromotive force through inductive coupling in the second coil 2-2.In the loop of the second coil 2-2 and capacitor 3 compositions, produce an attenuated oscillation electric current because of the existence that capacitor 3 and loop resistance are arranged makes this RLC loop, and in the second coil 2-2, produce an oscillatory extinction demagnetizing field.The present invention can obtain the enough wave numbers and the demagnetizing field of lapse rate, and permanent magnet is demagnetized fully; Its vibration is to occur in the secondary loop, can not be subjected to jumbo influence of storage capacitor and obtains desirable free convergent oscillation magnetic field; Its simple in structure, easy to use, easy care.
Description of drawings:
Fig. 1 is an electrical block diagram of the present invention, and Fig. 2 is the electrical block diagram of embodiment two, and Fig. 4 is the electrical block diagram of embodiment three, and Fig. 3, Fig. 5 are the electrical block diagrams of embodiment four.
Embodiment:
Embodiment one: in conjunction with Fig. 1 present embodiment is described, it is made up of pulsed power supplies 1, mutual inductor 2, capacitor 3; Mutual inductor 2 is the hollow mutual inductors that formed by the first coil 2-1, the common coiling of the second coil 2-2; The first and last end of the second coil 2-2 connects the two ends of capacitor 3 respectively, and the first and last end of the first coil 2-1 connects two outputs of pulsed power supplies 1 respectively.Present embodiment makes permanent magnet, the magnetic powder of putting into mutual inductor 2 and the workpiece material that needs demagnetization be able to desirable demagnetization.Front end pulsed power supplies 1 can be the custom-designed pulse power, also can utilize the existing pulsed power supply that magnetizes.Demagnetizing fields in the mutual inductor 2 still are desirable alignment magnetic field, in die cavity that can be in coil or the mould to the demagnetization after powder magnetic field orientating and permanent magnetic material moulding magnetic field orientating and the orientation.
Embodiment two: in conjunction with Fig. 2 present embodiment is described, present embodiment increases on the basis of embodiment one external magnetic field coil 4; One end of external magnetic field coil 4 connects the end of the second coil 2-2, and the other end of external magnetic field coil 4 connects an end of capacitor 3, and the other end of capacitor 3 connects the other end of the second coil 2-2; Other composition is identical with embodiment one with annexation.The external magnetic field coil 4 of present embodiment can be solenoid or the magnetism-filling base and the coil of the various forms structure that comprises the multipole magnetization seat.Present embodiment makes the permanent magnet of putting into by external magnetic field coil 4, and magnetic powder and the workpiece material that needs to demagnetize are able to desirable demagnetization.
Embodiment three: in conjunction with Fig. 4 present embodiment is described, present embodiment increases on the basis of embodiment one external magnetic field coil 4; External magnetic field coil 4 is in parallel with capacitor 3.Other composition is identical with embodiment one with annexation.External magnetic field coil 4 can be magnetism-filling base and the coil that comprises the various forms structure of multipole magnetization seat.
Embodiment four: in conjunction with Fig. 3, Fig. 5 present embodiment is described, present embodiment all increases on the basis of embodiment two, three magnetic conduction core 2-3; Magnetic conduction core 2-3 is embedded in the mutual inductor 2, and the magnetic induction axis of magnetic conduction core 2-3 and the magnetic induction axis of mutual inductor 2 coincide.Other composition is identical with embodiment two or three with annexation.What magnetic conduction core 2-3 selected is iron core or other soft magnetic material magnetic conductor.
Claims (4)
1. convergent oscillation type demagnetization device, it comprises pulsed power supplies (1), it is characterized in that it also comprises mutual inductor (2), capacitor (3); Mutual inductor (2) is the hollow mutual inductor that is formed by first coil (2-1), the common coiling of second coil (2-2); The first and last end of second coil (2-2) connects the two ends of capacitor (3) respectively, and the first and last end of first coil (2-1) connects two outputs of pulsed power supplies (1) respectively.
2. convergent oscillation type demagnetization device according to claim 1 is characterized in that its increase has external magnetic field coil (4); One end of external magnetic field coil (4) connects an end of second coil (2-2), and the other end of external magnetic field coil (4) connects an end of capacitor (3), and the other end of capacitor (3) connects the other end of second coil (2-2).
3. convergent oscillation type demagnetization device according to claim 1 is characterized in that its increase has external magnetic field coil (4); External magnetic field coil (4) is in parallel with capacitor (3).
4. according to claim 1,2 or 3 described convergent oscillation type demagnetization devices, it is characterized in that its increase has magnetic conduction core (2-3); Magnetic conduction core (2-3) is embedded in the mutual inductor (2), and the magnetic induction axis of the magnetic induction axis of magnetic conduction core (2-3) and mutual inductor (2) coincides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100098119A CN100369166C (en) | 2005-03-09 | 2005-03-09 | Convergent oscillation type demagnetization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100098119A CN100369166C (en) | 2005-03-09 | 2005-03-09 | Convergent oscillation type demagnetization device |
Publications (2)
| Publication Number | Publication Date |
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| CN1664966A CN1664966A (en) | 2005-09-07 |
| CN100369166C true CN100369166C (en) | 2008-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100098119A Expired - Fee Related CN100369166C (en) | 2005-03-09 | 2005-03-09 | Convergent oscillation type demagnetization device |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101404200B (en) * | 2008-07-17 | 2010-12-08 | 上海交通大学 | Micro-processor controlled magnet-stabilizing device |
| CN101552087B (en) * | 2008-12-16 | 2011-04-06 | 宁波科宁达工业有限公司 | Device and method for removing burr of molded neodymium iron boron product |
| CN101819850A (en) * | 2010-04-22 | 2010-09-01 | 湖南省联众科技有限公司 | Demagnetization method and demagnetization circuit |
| CN103456457B (en) * | 2013-08-20 | 2015-10-28 | 江苏科技大学 | High-strength steel narrow gap welding groove demagnetizing method |
| CN108346251A (en) * | 2018-04-09 | 2018-07-31 | 宁波讯强电子科技有限公司 | A kind of demagnetizer and audio magnetic label decoder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2076704U (en) * | 1990-04-14 | 1991-05-08 | 李荣生 | Energy saving demagnetiser |
| JP2001044029A (en) * | 1999-08-02 | 2001-02-16 | Shimizu Corp | Demagnetizing method for building structure and demagnetizing device used therefor |
| JP2001102216A (en) * | 1999-10-01 | 2001-04-13 | Shimizu Corp | Demagnetizing method for building structure and demagnetizing apparatus for use therein |
| CN2694445Y (en) * | 2004-02-26 | 2005-04-20 | 李志平 | Demagnetization apparatus containing a demagnetization oscillating circuit |
-
2005
- 2005-03-09 CN CNB2005100098119A patent/CN100369166C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2076704U (en) * | 1990-04-14 | 1991-05-08 | 李荣生 | Energy saving demagnetiser |
| JP2001044029A (en) * | 1999-08-02 | 2001-02-16 | Shimizu Corp | Demagnetizing method for building structure and demagnetizing device used therefor |
| JP2001102216A (en) * | 1999-10-01 | 2001-04-13 | Shimizu Corp | Demagnetizing method for building structure and demagnetizing apparatus for use therein |
| CN2694445Y (en) * | 2004-02-26 | 2005-04-20 | 李志平 | Demagnetization apparatus containing a demagnetization oscillating circuit |
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| CN1664966A (en) | 2005-09-07 |
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Granted publication date: 20080213 Termination date: 20140309 |