CN1664966A - Convergent oscillation type demagnetization device - Google Patents
Convergent oscillation type demagnetization device Download PDFInfo
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- CN1664966A CN1664966A CN 200510009811 CN200510009811A CN1664966A CN 1664966 A CN1664966 A CN 1664966A CN 200510009811 CN200510009811 CN 200510009811 CN 200510009811 A CN200510009811 A CN 200510009811A CN 1664966 A CN1664966 A CN 1664966A
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Abstract
The invention discloses a damping oscillation-type demagnetizing device, relating to the field of demagnetizing technique, and comprising mutual inductor and also pulse power supply as well as capacitor; wherein, the mutual inductor is a hollow mutual inductor, coiled of a primary coil and a secondary coil; and two ends of the secondary coil are connected with those of the capacitor, respectively, and two ends of the primary coil are two output ends of the pulse power supply, respectively. The invention can obtain a demagnetizing filed with enough wave number and reduction rate to completely demagnetize permanent magnet; the oscillation of the invention happens in the secondary loop, unable to be affected by high-capacity energy storage capacitor, thus obtaining idealized free damping oscillation magnetic field; and the structure of the invention is simple, and the invention is convenient to use and easy to maintain.
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 coil 2-1, the common coiling of coil 2-2; The first and last end of coil 2-2 connects the two ends of capacitor 3 respectively, and the first and last end of coil 2-1 connects two outputs of pulsed power supplies 1 respectively.Operation principle: momentary pulse electric current among the 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 coil 2-1 produces induced electromotive force through inductive coupling in coil 2-2.In the loop of 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 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 coil 2-1, the common coiling of coil 2-2; The first and last end of coil 2-2 connects the two ends of capacitor 3 respectively, and the first and last end of 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; The end of one end connecting coil 2-2 of external magnetic field coil 4, the other end of external magnetic field coil 4 connects an end of capacitor 3, the other end of the other end connecting coil 2-2 of capacitor 3; 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 coil (2-1), the common coiling of coil (2-2); The first and last end of coil (2-2) connects the two ends of capacitor (3) respectively, and the first and last end of 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 one end connecting coil (2-2) of external magnetic field coil (4), the other end of external magnetic field coil (4) connects an end of capacitor (3), the other end of the other end connecting coil (2-2) of capacitor (3).
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,, it is characterized in that its increase has magnetic conduction core (2-3) according to claim 1,2 or 3 described convergent oscillation type demagnetization devices; 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 |
|---|---|
| CN1664966A true CN1664966A (en) | 2005-09-07 |
| CN100369166C 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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| CN (1) | CN100369166C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819850A (en) * | 2010-04-22 | 2010-09-01 | 湖南省联众科技有限公司 | Demagnetization method and demagnetization circuit |
| 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 |
| CN103456457A (en) * | 2013-08-20 | 2013-12-18 | 江苏科技大学 | Demagnetizing method of high-strength steel narrow-gap welding groove |
| 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 |
Family Cites Families (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
Cited By (6)
| 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 |
| CN103456457A (en) * | 2013-08-20 | 2013-12-18 | 江苏科技大学 | Demagnetizing method of high-strength steel narrow-gap welding groove |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN100369166C (en) | 2008-02-13 |
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Granted publication date: 20080213 Termination date: 20140309 |