CN202394634U - Degaussing circuit - Google Patents
Degaussing circuit Download PDFInfo
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- CN202394634U CN202394634U CN2011202722748U CN201120272274U CN202394634U CN 202394634 U CN202394634 U CN 202394634U CN 2011202722748 U CN2011202722748 U CN 2011202722748U CN 201120272274 U CN201120272274 U CN 201120272274U CN 202394634 U CN202394634 U CN 202394634U
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Abstract
The utility model discloses a degaussing circuit which comprises a rectifier circuit, an alternating current (AC) main circuit formed by connecting an AC power supply (V1), a magnetic field coil (L1), a current-limiting resistor (R1) and a resonant capacitor (C2) in series, a direct current (DC) charging circuit formed by connecting a capacitor (C1) and a switch (S1), and a discharge circuit which is connected with the DC charging circuit in parallel and is formed by connecting the capacitor (C1), a resistor (R2) and another switch (S2), wherein an AC input end of the rectifier circuit is connected with the AC main circuit, and a DC output end of the rectifier circuit is connected with the DC charging circuit. The degaussing circuit is novel in method, ingenious in circuit structure, simple in implementation, good in degaussing effect, capable of repeatedly degaussing, and flexible in adjustment for degaussing degree and time.
Description
Technical field
The utility model relates to physical method demagnetization field, particularly is applied to the demagnetization method and the degaussing circuit of degausser.
Background technology
Give the magnetic material demagnetization, perplex people for a long time always, also do not have good solution.At present, current demagnetization method relates generally to following several kinds on the market:
A kind of is to adopt the charging of paired pulses electric capacity, passes through electric capacity then to coil discharge, forms attenuated oscillation, and produces demagnetizing field.Yet this method can not be doing the perdurabgility of demagnetizing field very longly owing to the restriction that receives the pulsed capacitance capacity, and this has just influenced the effect of demagnetization, and this method generally only is applicable to the demagnetization or the demagnetization of hard magnetic material.
Second method is to adopt coil stationary to receive on civil power 220V or the 380V; Produce a constant AC magnetic field; Object through needing demagnetization slowly shifts out magnetic field up to the place away from magnetic field with certain speed from magnetic field, the demagnetizing field of analog attenuation and reach the purpose of demagnetization.This method is fit to soft magnetic material, and semihard medium-soft magnetic material carries out demagnetization, and effect is pretty good.But owing to need mobile object, operation is not easily, and is relatively more clumsy.
The third method is improved second method exactly; Be connected to coil through an AC voltage regulator; With the descending adjusting of the output voltage of voltage regulator, thereby make the descending variation in magnetic field in the coil, form demagnetizing field and reach the purpose that makes the object demagnetization.This method, object need not move, but need manual or motorized adjustment voltage regulator, and reliability is not high.
The 4th kind of method is exactly that coil is received on the program control AC power; The output current of AC power is descending through the control of the CPU in the power supply; And the frequency of output current, the time that output current changes all can be by the control of the CPU in the power supply, and the demagnetizing field of generation makes the object demagnetization.This method, advanced technology, effect is pretty good, but program control AC power line is complicated.Though above-mentioned various demagnetization method can both carry out certain demagnetizing action, has numerous disadvantages and shortcoming, is difficult to overcome, degaussing process is wayward.
The utility model content
In order to overcome the defective that above-mentioned prior art exists, the utility model provides a kind of degaussing circuit effect good, can repeat demagnetization; But erassability and time flexible; Circuit structure is applied to the degaussing circuit of demagnetization cleverly, can be widely used in the various Deperming Facilities, and is applied widely.
To achieve these goals, the technical scheme of the utility model is following:
A kind of degaussing circuit; It comprises a rectification circuit; The ac main circuit that constitutes by AC power, field coil, current-limiting resistance and resonant capacitance series connection; DC charging loop and the parallelly connected discharge loop that is connected and composed by said electric capacity, resistance and another switch with said DC charging loop by electric capacity and switch connect and compose are formed jointly, and the ac input end of rectification circuit connects said ac main circuit, and its dc output end connects said DC charging loop.
Further, said rectification circuit is connected and composed by the diode bridge rectistack, and two ac terminals of said diode bridge rectistack connect AC power and resonant capacitance in the ac main circuit respectively.
Above-mentioned rectification circuit is to be piled by a rectifier bridge of four diodes of encapsulation to constitute.
Second scheme that realizes above-mentioned degaussing circuit is: it comprises a rectification circuit; The ac main circuit that constitutes by AC power, field coil, current-limiting resistance and resonant capacitance series connection; DC charging loop and the parallelly connected discharge loop that is connected and composed by said electric capacity, resistance and another switch with said DC charging loop by electric capacity and switch connect and compose are formed jointly; The ac input end of rectification circuit connects said ac main circuit; Its dc output end connects said DC charging loop, and said current-limiting resistance is arranged in the said DC charging loop, with capacitances in series.
The 3rd scheme is; It comprises a rectification circuit; The ac main circuit that constitutes by AC power, field coil, current-limiting resistance and resonant capacitance series connection; DC charging loop and the parallelly connected discharge loop that is connected and composed by said electric capacity, resistance and another switch with said DC charging loop by electric capacity and switch connect and compose are formed jointly, and the ac input end of rectification circuit connects said ac main circuit, and its dc output end connects said DC charging loop; Said current-limiting resistance is arranged in the said rectification circuit, connects with diode.
The 4th scheme is; It comprises a rectification circuit; By AC power, field coil, and the ac main circuit that constitutes of resonant capacitance series connection; DC charging loop and the parallelly connected discharge loop that is connected and composed by said electric capacity, another switch with said DC charging loop by electric capacity and switch connect and compose are formed jointly, and the ac input end of rectification circuit connects said ac main circuit, and its dc output end connects said DC charging loop; Also comprise a resistance; Said resistance is connected in DC charging loop and the discharge loop simultaneously, and said resistance one end connects electric capacity, and the said resistance other end connects the dc terminal of switch and diode bridge rectistack simultaneously.
AC power in the ac main circuit described in above-mentioned four schemes is civil power one-way communication 220V or two-phase alternating current 380V, for whole degaussing circuit provides power supply; Said field coil itself has induction reactance and impedance, when its impedance reaches can satisfy the requiring of current limliting the time, does not then need above-mentioned current-limiting resistance; Said resonant capacitance can produce capacitive reactance, can offset the induction reactance of said field coil, with the Frequency point of its resonance in AC power; It is resistive making whole ac circuit; If the induction reactance of said field coil is littler than current-limiting resistance, little to the influence of maximum alternating current, can not need resonant capacitance.
Said diode bridge rectistack is the effect of playing rectification, also can be other circuit structures of realizing forming rectification circuit, forms like the diode of four separations.
Said DC charging loop is made up of the dc terminal of diode bridge rectistack, switch and capacitances in series, and said electric capacity is connected with another switch and resistance and constituted discharge loop, and the DC charging loop is parallelly connected with discharge loop, a shared electric capacity.
Further, said two switches can adopt mechanical switch, also can adopt electronic switch, like controllable silicon, triode, FET or the like; Said shared electric capacity is polarity free capacitor or polar capacitor is arranged.
Above-mentioned degaussing circuit realizes that the detailed process of demagnetization is: at first; Connect the switch in AC power and above-mentioned DC charging loop; The switch of discharge loop is in off-state; AC power is given the charging of the electric capacity in the said charge circuit through said diode bridge rectistack output direct current, and the electric current of ac main circuit is controlled by the charging current in the charge circuit, and the electric current of ac main circuit is the gradually alternating current of decay identical with ac power frequency; Be to flow through the said alternating current of decay gradually in the field coil, carry out demagnetization work.
When said electric capacity charging reached the crest voltage of AC power, charging process was accomplished, and electric current will be zero, and degaussing process finishes; Break off the switch in said DC charging loop then; Switch in the closed again discharge loop; Electric capacity after the charging then discharges through the resistance in the discharge loop; What of discharge are by the decision of the closing time of said switch, control the voltage behind the said capacitor discharge, thereby the maximum current of controlling demagnetization next time are maximum erasing field.
Break off said switch again after discharge finishes, prepare, when needing demagnetization for the second time, repeat said process for degaussing process next time.
The beneficial effect of the utility model is, circuit structure is ingenious, and principle is simple, realizes that easily erasure effect is good, can control erasing field size and erasing time flexibly.
Description of drawings
Fig. 1 is the circuit diagram of the utility model embodiment one;
The isoboles that Figure 1A is replaced for resistance R 1 among Fig. 1;
The isoboles that Figure 1B is replaced for capacitor C 1 among Fig. 1.
Fig. 2 is the circuit diagram of the utility model embodiment two.
Fig. 3 is the circuit diagram of the utility model embodiment three.
Fig. 4 is the circuit diagram of the utility model embodiment four.
Fig. 5 is the circuit diagram of the utility model embodiment five.
Embodiment:
For the creation characteristic, the technological means that make the utility model and reach purpose and be easy to understand and understand, further set forth the utility model below in conjunction with specific embodiment.
Embodiment one: referring to Fig. 1; The described degaussing circuit of the utility model; It comprises a rectification circuit; The ac main circuit that constitutes by AC power V1, field coil L1, current-limiting resistance R1 and resonant capacitance C2 series connection; DC charging loop that is connected and composed by capacitor C 1 and switch S 1 and the parallelly connected discharge loop that is connected and composed by said capacitor C 1, resistance R 2 and another switch S 2 with said DC charging loop are formed jointly, and the ac input end of rectification circuit connects said ac main circuit, and its dc output end connects said DC charging loop.
Said rectification circuit is connected and composed by diode bridge rectistack BG1, and two ac terminals of said diode bridge rectistack BG1 connect AC power V1 and the resonant capacitance C2 in the ac main circuit respectively.
Wherein, said diode bridge rectistack BG1 also can be four separations diode is formed; Switch S 1 is a mechanical switch with switch S 2, also can be arranged to electronic switch.
AC power V1 is civil power 220V, and an end connects field coil L1, and the other end connects the ac terminal of diode bridge rectistack BG1; Said field coil has connected the current-limiting resistance R1 of metering function; Current-limiting resistance R1 connects resonant capacitance C2 again; Resonant capacitance C2 connects another ac terminal of said diode bridge rectistack BG1 again, and said AC power V1, current-limiting resistance R1, capacitor C 1, resonant capacitance C2 connect with two ac terminals of diode bridge rectistack BG1 and constitute ac main circuit.
The dc terminal of diode bridge rectistack BG1 connects an end of switch S 1; The other end of switch S 1 connects resistance R 2 and capacitor C 1 simultaneously; Capacitor C 1 connects another dc terminal of diode bridge rectistack BG1 again, and promptly said switch S 1, capacitor C 1 connect to form the DC charging loop with diode bridge rectistack BG1 dc terminal; Be connected with switch S 2 between resistance R 2 and the capacitor C 1, promptly switch S 2, capacitor C 1 connect and compose the discharge loop parallelly connected with the DC charging loop with resistance R 2.
The ac main circuit that the utility model degaussing circuit mainly is made up of above-mentioned electronic component, DC charging loop and discharge loop constitute jointly; When utilizing charge circuit to capacitor C 1 charging; The electric current of charging current and ac main circuit is reduced to zero Changing Pattern reaches demagnetization as the required electrorheological law of field coil L1 demagnetization purpose at last along with the time slowly descends.
The concrete course of work and principle are: at first, energized V1, switch S 1 is all broken off with switch S 2, and ac main circuit is equivalent to also break off, and does not have electric current among the field coil L1; When being no-voltage on the capacitor C 1, close switch S1, switch S 2 still is in off-state; Degaussing process begins, and AC power V1 gives capacitor C 1 charging through the diode bridge rectistack BG1 in the ac main circuit, is equivalent to ac main circuit and connects through diode bridge rectistack BG1; And the electric current that flows through field coil L1 in the ac main circuit is controlled by the charging current of capacitor C 1; Through the switching-over effect of diode bridge rectistack BG1, the charging current of capacitor C 1 is the pulsating current of twice supply frequency, and the electric current of field coil L1 is the gradually alternating current of decay identical with supply frequency; Capacitor C 1 continues charging, and demagnetization is carried out always.
When capacitor C 1 was charged to the crest voltage of power supply V1, charging was accomplished, and electric current will be zero, and degaussing process also just finishes; Then, cut-off switch S1, close switch S2 again, discharge loop is connected, and capacitor C 1 is through resistance R 2 discharges, is discharged to cut-off switch S2 behind the voltage of no-voltage or certain numerical value, for degaussing process is next time prepared.
Through the closing time of control switch S2, can control capacitance C1 voltage after the discharge, thereby control the maximum current of demagnetization next time, promptly maximum erasing field.
The time length of the RC time constant decision degaussing process of current-limiting resistance R1 and capacitor C 1 if control the time of degaussing process, can be used different current-limiting resistances to connect with diverter switch and substitute above-mentioned current-limiting resistance R1.
Referring to Figure 1A, with two different resistance R 1 ' and R1 " and the diverter switch S3 current-limiting resistance R1 among back replacement Fig. 1 that connects, other part is constant.
Resistance R 1 ' and R1 " the field coil L1 described in the end connection layout 1 after parallelly connected, the other end diverter switch S3 that is connected in series, diverter switch S3 connects resonant capacitance C2 again.Thereby the size through diverter switch S3 conversion current-limiting resistance changes the RC time constant, and then the time of control degaussing process.
Referring to Figure 1B, current-limiting resistance R1 and also available two different capacitor C 1 ' of the RC time constant of capacitor C 1 and C1 " and diverter switch S4 replacement Fig. 1 in capacitor C 1, other part remains unchanged.
Capacitor C 1 ' and C1 " dc terminal of the diode bridge rectistack BG1 described in the end connection layout 1 after parallelly connected, the other end diverter switch S4 that is connected in series, diverter switch S4 connects resistance R 2 again.Thereby the size through diverter switch S4 conversion electric capacity changes the RC time constant, and then the time of control degaussing process.
In fact, also can above-mentioned current-limiting resistance R1 and capacitor C 1 be replaced, the adjustable scope of RC time constant is bigger like this, but circuit structure has just become relative complex.
Embodiment two:
Referring to Fig. 2, different with embodiment one is the brachium pontis the inside that current-limiting resistance R1 is moved on to diode bridge rectistack BG1, becomes four resistance R O and links to each other with diode respectively, and other all components and parts and position remain unchanged.
Like this, field coil L1 directly connects resonant capacitance C2, and metering function will realize that demagnetization principle and effect are with embodiment one by four resistance R O that are incorporated in the diode bridge rectistack BG1.
Embodiment three:
Referring to Fig. 3; Different with embodiment one is that current-limiting resistance R1 among Fig. 1 is moved on in the DC charging loop; Be that field coil L1 directly connects resonant capacitance C2; Current-limiting resistance R1 one end connects the dc terminal of diode bridge rectistack BG1, and the other end connects capacitor C 1, and other components and parts and position remain unchanged.
Because ac main circuit is through diode bridge rectistack BG1 and DC charging circuit communication; And the electric current of said ac main circuit is controlled by the charging current in DC charging loop; So current-limiting resistance R1 moves on to the effect that also can play the electric current of indirect control ac main circuit in the said DC charging loop, offset magnetic principle and effect did not influence.
Embodiment four:
Referring to Fig. 4; Different with embodiment one is that current-limiting resistance R1 among Fig. 1 and resistance R 2 are united two into one, and replaces with resistance R shown in Figure 4 12, and resistance R 12 is connected in the common line of DC charging loop and discharge loop; Be that resistance R 12 is connected with capacitor C 1; And be present in simultaneously in said DC charging loop and the discharge loop, field coil L1 directly connects resonant capacitance C2, and other components and parts and position remain unchanged.
Shown in the figure, an end of resistance R 12 connects capacitor C 1, and the other end connects the dc terminal of switch S 2 and diode bridge rectistack BG1 simultaneously; At this moment, resistance R 12 plays two effects, and one is the metering function that is used for ac main circuit, and another effect is the load resistance of needs when being used for the discharge loop capacitor discharge.
Embodiment five:
Referring to Fig. 5, different with embodiment one is to have saved current-limiting resistance R1 and the resonant capacitance C2 among Fig. 1, the field coil L1 that selected parameter and performance are suitable; Field coil L1 directly connects the ac terminal of diode bridge rectistack BG1; Induction reactance and impedance acting in conjunction through said field coil L1 itself come current limliting, so do not need current-limiting resistance R1 resonant capacitor C 2, have reduced the use of components and parts; Circuit shown in Figure 5 is only the circuit that in product, often uses, and helps reducing cost.
Among above-mentioned each embodiment; Field coil L1 both can be integrated with degausser, also can place outside the degausser, lets user oneself buy and install; Reserve the circuit terminals of said field coil L1 when producing degausser; The user is connected it and gets final product with the field coil L1 that buys, the demagnetization principle does not change basically, belongs in the protection range of the utility model yet.
More than show and described the advantage of basic principle, principal character and the utility model of the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; The utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection range to be defined by appending claims and equivalent thereof.
Claims (7)
1. degaussing circuit; It is characterized in that; It comprises a rectification circuit; Ac main circuit by AC power (V1), field coil (L1), current-limiting resistance (R1) and resonant capacitance (C2) series connection formation; DC charging loop and the parallelly connected discharge loop that is connected and composed by said electric capacity (C1), resistance (R2) and another switch (S2) with said DC charging loop by an electric capacity (C1) and a switch (S1) connect and compose are formed jointly, and the ac input end of rectification circuit connects said ac main circuit, and its dc output end connects said DC charging loop.
2. a kind of degaussing circuit according to claim 1; It is characterized in that; Said rectification circuit is connected and composed by diode bridge rectistack (BG1), and two ac terminals of said diode bridge rectistack (BG1) connect the AC power (V1) and resonant capacitance (C2) in the ac main circuit respectively.
3. a kind of degaussing circuit according to claim 1 and 2 is characterized in that, said rectification circuit is to be piled by a rectifier bridge of four diodes of encapsulation to constitute.
4. a kind of degaussing circuit according to claim 1 is characterized in that, said two switches (S1 and S2) adopt mechanical switch or adopt electronic switch.
5. degaussing circuit; It is characterized in that; It comprises a rectification circuit, by the ac main circuit that AC power (V1), field coil (L1), current-limiting resistance (R1) and resonant capacitance (C2) series connection constitute, is made up of jointly DC charging loop and the parallelly connected discharge loop that is connected and composed by said electric capacity (C1), resistance (R2) and another switch (S2) with said DC charging loop that an electric capacity (C1) and a switch (S1) connect and compose; The ac input end of rectification circuit connects said ac main circuit; Its dc output end connects said DC charging loop, and said current-limiting resistance (R1) is arranged in the said DC charging loop, and (C1) connects with electric capacity.
6. degaussing circuit; It is characterized in that; It comprises a rectification circuit, by the ac main circuit that AC power (V1), field coil (L1), current-limiting resistance (R1) and resonant capacitance (C2) series connection constitute, is made up of jointly DC charging loop and the parallelly connected discharge loop that is connected and composed by said electric capacity (C1), resistance (R2) and another switch (S2) with said DC charging loop that an electric capacity (C1) and a switch (S1) connect and compose; The ac input end of rectification circuit connects said ac main circuit; Its dc output end connects said DC charging loop, and said current-limiting resistance (R1) is arranged in the said rectification circuit, connects with diode.
7. degaussing circuit; It is characterized in that; It comprises a rectification circuit, by AC power (V1), field coil (L1), and the ac main circuit that constitutes of resonant capacitance (C2) series connection, is made up of jointly DC charging loop and the parallelly connected discharge loop that is connected and composed by said electric capacity (C1), another switch (S2) with said DC charging loop that an electric capacity (C1) and a switch (S1) connect and compose; The ac input end of rectification circuit connects said ac main circuit; Its dc output end connects said DC charging loop, also comprises a resistance (R12), and said resistance (R12) is connected in DC charging loop and the discharge loop simultaneously; Said resistance (R12) end connects electric capacity (C1), and said resistance (R12) other end connects the dc terminal of switch (S2) and diode bridge rectistack (BG1) simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202722748U CN202394634U (en) | 2011-07-29 | 2011-07-29 | Degaussing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202722748U CN202394634U (en) | 2011-07-29 | 2011-07-29 | Degaussing circuit |
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| Publication Number | Publication Date |
|---|---|
| CN202394634U true CN202394634U (en) | 2012-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202722748U Expired - Fee Related CN202394634U (en) | 2011-07-29 | 2011-07-29 | Degaussing circuit |
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| CN (1) | CN202394634U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021624A (en) * | 2012-11-22 | 2013-04-03 | 无锡机电高等职业技术学校 | Acoustic-magnetic label demagnetizer and demagnetization method |
| CN105989986A (en) * | 2015-02-28 | 2016-10-05 | 盖玥 | Simple magnetizing circuit |
| CN111243825A (en) * | 2018-11-29 | 2020-06-05 | 阿尔贝特·莫伊雷尔 | Device for demagnetizing ferromagnetic material |
-
2011
- 2011-07-29 CN CN2011202722748U patent/CN202394634U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021624A (en) * | 2012-11-22 | 2013-04-03 | 无锡机电高等职业技术学校 | Acoustic-magnetic label demagnetizer and demagnetization method |
| CN103021624B (en) * | 2012-11-22 | 2015-01-28 | 无锡机电高等职业技术学校 | Acoustic-magnetic label demagnetizer and demagnetization method |
| CN105989986A (en) * | 2015-02-28 | 2016-10-05 | 盖玥 | Simple magnetizing circuit |
| CN111243825A (en) * | 2018-11-29 | 2020-06-05 | 阿尔贝特·莫伊雷尔 | Device for demagnetizing ferromagnetic material |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20140729 |
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| EXPY | Termination of patent right or utility model |