CN209170239U - A kind of three phase full wave rectification ultralow frequency demagnetization circuit - Google Patents
A kind of three phase full wave rectification ultralow frequency demagnetization circuit Download PDFInfo
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- CN209170239U CN209170239U CN201821575339.4U CN201821575339U CN209170239U CN 209170239 U CN209170239 U CN 209170239U CN 201821575339 U CN201821575339 U CN 201821575339U CN 209170239 U CN209170239 U CN 209170239U
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Abstract
The utility model discloses a kind of three phase full wave rectification ultralow frequency demagnetization circuit, including demagnetization main circuit, the demagnetization main circuit includes the 1st inductance 1L00, the 1st rectification circuit, the 2nd rectification circuit, inductive load and resistance RS01.The three phase full wave rectification ultralow frequency demagnetization circuit of the utility model, the magnetic energy that can provide adjusting size power inspires the square-wave pulse of positive inverted signal using quick controllable silicon features, the DC pulse of moment releases powerful magnetic potential energy, generates high power pulse and motivates demagnetizing field.
Description
Technical field
The utility model relates to a kind of three phase full wave rectification ultralow frequency demagnetization circuits.
Background technique
Need to demagnetize workpiece shapes complexity, and workpiece handling lifts by crane frequently with kicker magnet, can on this series of process workpiece
Remanent magnetism is formed, and remanent magnetism position is indefinite, remanent magnetism magnetic domain direction is in disorder.Collection skin phenomenon of the workpiece due to alternating current, alternating current institute shape
At externally-applied magnetic field can only be in the near surface of workpiece, therefore the remanent magnetism for the workpiece near surface that can only decorporate.It is demagnetized using DC power supply,
Since DC power supply direction is single, no kelvin effect can return the remanent magnetism away from workpiece surface deep part.
It is more due to generating workpiece remanent magnetism, remanent magnetism is formed by when different from usually magnetizing workpiece, direction is indefinite,
The demagnetization degree-of-difficulty factor of this kind of workpiece is larger, due to the uncertainty of remanent magnetism magnetic domain direction, demagnetization generally to such workpiece,
It needs first to magnetize to workpiece when demagnetization, under the action of externally-applied magnetic field, makes remanent magnetic field direction in order by force, then carry out again
It reversely magnetizes and gradually commutation decays (i.e. commutation damped method demagnetization), preferable demagnetization effectiveness can be obtained in this way.
Therefore, it is necessary to a kind of three phase full wave rectification ultralow frequency demagnetization circuits to solve the above problems.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of three phase full wave rectification ultralow frequency demagnetization circuits.
In order to solve the above-mentioned technical problem, the technology that the three phase full wave rectification ultralow frequency demagnetization circuit of the utility model uses
Scheme is as follows.
A kind of three phase full wave rectification ultralow frequency demagnetization circuit, including demagnetization main circuit, the demagnetization main circuit include the 1st electricity
Feel 1L00, the 1st rectification circuit, the 2nd rectification circuit, inductive load and protective resistance RS01,
1st rectification circuit includes the 11st rectification circuit and the 11st inductance 1L11, and the 11st rectification circuit includes the
11 silicon-controlled 153 and the 12nd silicon-controlled 151, the described 11st silicon-controlled 153 and the 12nd silicon-controlled 151 is end to end, and the described 11st
One end of inductance 1L11 connects one end of the 11st rectification circuit；
2nd rectification circuit includes the 21st rectification circuit and the 21st inductance 1L22, and the 21st rectification circuit includes the
21 silicon-controlled 111 and the 22nd silicon-controlled 104, the described 21st silicon-controlled 111 and the 22nd silicon-controlled 104 is end to end, and the described 21st
One end of inductance 1L22 connects one end of the 21st rectification circuit；
The other end of the 11st inductance 1L11 connects one end of the 1st inductance 1L00, the 21st inductance 1L22's
The other end connects the other end of the 1st inductance 1L00；
One end of the inductive load connects the midpoint of the 1st inductance 1L00, and the other end of the 1st inductance 1L00 connects
One end of the protective resistance RS01 is connect, the other end of the protective resistance RS01 connects the other end of the 11st rectification circuit
With the other end of the 21st rectification circuit.
It further, further include multiple the 1st rectification circuits being connected in parallel.
Further, the quantity of the 1st rectification circuit is 3.
It further, further include multiple the 2nd rectification circuits being connected in parallel.
Further, the quantity of the 2nd rectification circuit is 3.
The utility model has the advantages that the three phase full wave rectification ultralow frequency demagnetization circuit of the utility model, it is possible to provide adjusting size power
Magnetic energy inspires the square-wave pulse of positive inverted signal using quick controllable silicon features, and the DC pulse of moment releases powerful magnetic potential
Can, it generates high power pulse and motivates demagnetizing field.
Detailed description of the invention
Fig. 1 is direct current demagnetization main circuit diagram；
Fig. 2 is the regular schematic diagram of ultralow frequency commutation damped method demagnetization.
Specific embodiment
It is hereafter to be described in detail for embodiment cooperation attached drawing mode, but provided embodiment is not to limit this
The range that utility model is covered, and the non-sequence to limit its execution of the description of structure operation, it is any by component again group
The structure of conjunction, it is produced that there is equal and other effects device, it is all the range that the utility model is covered.
It please refers to shown in Fig. 1 and Fig. 2, the three phase full wave rectification ultralow frequency demagnetization circuit of the utility model, including demagnetization master
Circuit, demagnetization main circuit include the 1st inductance 1L00, the 1st rectification circuit, the 2nd rectification circuit, inductive load and protective resistance
RS01,
1st rectification circuit includes the 11st rectification circuit and the 11st inductance 1L11, and the 11st rectification circuit includes the 11st silicon-controlled
153 and the 12nd silicon-controlled 151, the 11st silicon-controlled 153 and the 12nd silicon-controlled 151 end to end, one end of the 11st inductance 1L11 connects
Connect one end of the 11st rectification circuit.
2nd rectification circuit includes the 21st rectification circuit and the 21st inductance 1L22, and the 21st rectification circuit includes the 21st silicon-controlled
111 and the 22nd silicon-controlled 104, the 21st silicon-controlled 111 and the 22nd silicon-controlled 104 end to end, one end of the 21st inductance 1L22 connects
Connect one end of the 21st rectification circuit.
The other end of 11st inductance 1L11 connects one end of the 1st inductance 1L00, the other end connection the 1st of the 21st inductance 1L22
The other end of inductance 1L00.
One end of inductive load connects the midpoint of the 1st inductance 1L00, and the other end of the 1st inductance 1L00 connects protective resistance
One end of RS01, the other end of protective resistance RS01 connect the 11st rectification circuit the other end and the 21st rectification circuit it is another
End.
It preferably, further include multiple the 1st rectification circuits being connected in parallel.Preferably, the quantity of the 1st rectification circuit is 3.
It preferably, further include multiple the 2nd rectification circuits being connected in parallel.Preferably, the quantity of the 2nd rectification circuit is 3.
Utility model principle:
The working principle of three phase full wave rectification ultralow frequency demagnetization circuit: L1, L2 and L3 three phase supply circuit 380V, through 15
Line, 16 lines and 17 lines are sent to FA1, FA2 and FA3 fusible link, control primary circuit.Primary circuit is output to through T01 transformer and moves back
Magnetic main circuit, the the 12nd silicon-controlled 151 and the 22nd silicon-controlled 104 is connected in order according to phase trigger signal, and load will obtain just
To full-wave rectification electric current；Demagnetize main circuit the the 11st silicon-controlled 153 and the 21st silicon-controlled 111 according to phase trigger signal in order
Conducting, load will obtain reversed full-wave rectification electric current.Protective resistance RS01 is current divider for detecting DC current size feedback
To triggering wiring board to guarantee current precision, it is ensured that the protection of loading coil adstante febre.1st inductance 1L00 is reactor for inhaling
The energy of take-up circle storage, is protected silicon-controlled.
Because three phase full wave rectification demagnetization system is to reach demagnetization purpose by the positive decommuntation decaying of electric current, pass through people
Demagnetization current size, demagnetization length of time, the demagnetization frequency size of machine interface setting, system adjust electricity automatically according to relevant parameter
Flow attenuation amplitude and silicon-controlled forward and reverse turn-on time, so that it may control the size of current of load, while also control electric current side
To until current attenuation is to zero, therefore having achieved the purpose that three phase full wave rectification demagnetizes.
The three phase full wave rectification ultralow frequency demagnetization circuit of the utility model, it is possible to provide the magnetic energy of adjusting size power.Demagnetization
Electric current (magnetic energy) is if selection is too small, it is impossible to form the sufficiently large backing field contrary with remanent magnetic field, take out work
Remanent magnetic field inside part cannot achieve demagnetization and require.If frequency selection of demagnetizing is too low, within the identical demagnetization time, often
The overlong time that magnetizes of secondary reverse, the number that entire reverse is magnetized are reduced, and demagnetization requires also to be unable to reach；Demagnetization
Frequency selection is excessively high, and the time that reverse magnetizes is short, and the time magnetized to remanent magnetic field opposite direction, magnetic field was not yet offset with regard to short
It begins to reversely magnetize, demagnetization effectiveness is also very poor.Therefore, the selection of demagnetization frequency is depending on the circumstances, different workpiece selections
Different demagnetization frequencies is general to demagnetize frequency selection between 0.5-5Hz.Selection of time of demagnetizing is too short, then constant in frequency
In the case of, after each reverse, the drop for the electric current that magnetizes is big, and the magnetic field after commutation and reversed magnetic field drop are also big, remaining
Magnetic field is high, and demagnetization effectiveness is poor；Selection of time of such as demagnetizing is too long, and the electric current drop that magnetizes is small, when work when equipment is in high current
Between also grow, equipment heating is serious, influences the service life of equipment, or even burn electric elements.General demagnetization selection of time 10-
30s.In actual mechanical process, due to the difference of load, when energization is magnetized, due to the presence of the factors such as impedance, induction reactance, vortex,
When especially magnetizing coil charging magnetizes, the electric current that actually magnetizes has certain decaying, and demagnetization current fall is too fast, so that not
To demagnetization the time when, demagnetization current value is with regard to very little, it is difficult to current value is shown on ammeter.Therefore, larger workpiece is carried out ultralow
When frequency demagnetizes, select electric current big, the demagnetization time is long, frequency is low obtains ideal demagnetization effectiveness.
Embodiment 1:
1.1, moving trolley size:
Long 3000mm, wide 1200mm, height of the carbody 105mm, height containing wheel are 290mm.
, maximum carrying Workpiece length:
The longest workpiece that trolley can be placed is 5000mm, when placing the workpiece of length 5000mm, workpiece front and back on trolley
1000mm can respectively be exposed.
, maximum carrying workpiece weight: 4T；
1.4, transmission electrical machine model: WB150-WD-59-2.2KW；
1.5, stainless steel conveyor chain: 12A, it is 15 meters long.
, power supply: ± 10% 50Hz of three-phase and four-line 380V；
1.7, working method: to set demagnetization current 10000A--0A decaying, demagnetization frequency is set as 0.5HZ, when demagnetization
Between be selected as 20s, demagnetizing apparatus working law such as Fig. 2 (demagnetizes regular schematic diagram) see ultralow frequency commutation damped method.
Embodiment 2:
It, can be by workpiece close to the fringe demagnetization of coil, the density of line of magnetic force of edge to some demagnetizations compared with small workpiece
It is larger.
Big to specification, complex-shaped workpiece demagnetization, is centrally disposed magnetic field position demagnetization for workpiece as far as possible.
Different workpiece will reach same demagnetization effectiveness, and the method for demagnetization is different, below just several works of different shapes
Part demagnetization is recommended as follows:
2.1, the demagnetization of cylindric workpiece
It demagnetizes for this cylindric workpiece, it is proposed that workpiece, which upsides down, to be put, and disc is allowed to demagnetize with the direction that trolley passes through coil
Effect is preferable.
, cuboid workpiece demagnetization
It demagnetizes for cuboid workpiece, it is proposed that narrow face-up demagnetization effectiveness is preferable.
, multiple small workpieces demagnetize simultaneously
When multiple small workpieces are demagnetized together, workpiece is placed in effective magnetizing region (range of each 600mm before and after coil)
Interior, a certain distance must be had by putting between workpiece, avoid accumulating between workpiece, otherwise can be interfered with each other between workpiece, be influenced
Demagnetization effectiveness.
, workpiece in irregular shape (demagnetization difficulty is biggish) demagnetization
Workpiece demagnetization difficulty in irregular shape is larger, can be appropriate if workpiece remanent magnetism is larger to encounter the case where moving back to fall
Demagnetization frequency is reduced, the demagnetization time lengthens (being usually no more than 30s).If still moved back, measurement workpiece both ends remanent magnetism is simultaneously
Remanence direction is observed, then with the current magnetization workpiece smaller than demagnetization current, measures the magnetic direction after workpiece magnetizing again, such as
Magnetic direction is identical with original remanence direction after fruit magnetization, then is demagnetized again with the demagnetization current bigger than magnetizing current, then measure
Remanent magnetism.If the magnetic direction after magnetization with original remanence direction on the contrary, if demagnetized with the electric current smaller than magnetizing current.It can
Best demagnetization effectiveness is fallen back on to be repeated several times until.
The three phase full wave rectification ultralow frequency demagnetization circuit of the utility model, it is possible to provide the magnetic energy of adjusting size power utilizes
Quick controllable silicon features, inspire the square-wave pulse of positive inverted signal, and the DC pulse of moment releases powerful magnetic potential energy, generates Gao Gong
Rate pulse excitation demagnetizing field.
Claims (5)
1. a kind of three phase full wave rectification ultralow frequency demagnetization circuit, it is characterised in that: including the main circuit that demagnetizes, the demagnetization main circuit
Including the 1st inductance 1L00, the 1st rectification circuit, the 2nd rectification circuit, inductive load and protective resistance RSO1,
1st rectification circuit includes the 11st rectification circuit and the 11st inductance 1L11, and the 11st rectification circuit can including the 11st
Silicon 153 and the 12nd silicon-controlled 151 is controlled, the described 11st silicon-controlled 153 and the 12nd silicon-controlled 151 is end to end, the 11st inductance
One end of 1L11 connects one end of the 11st rectification circuit；
1st rectification circuit further includes the 21st rectification circuit and the 21st inductance 1L21 and the 31st rectification circuit and the 31st electricity
Feel lL31；
2nd rectification circuit includes the 21st rectification circuit and the 21st inductance 1L22, and the 21st rectification circuit can including the 21st
Silicon 111 and the 22nd silicon-controlled 104 is controlled, the described 21st silicon-controlled 111 and the 22nd silicon-controlled 104 is end to end, the 21st inductance
One end of 1L22 connects one end of the 21st rectification circuit:
2nd rectification circuit further includes the 22nd rectification circuit and the 22nd inductance lL22 and the 32nd rectification circuit and the 32nd electricity
Feel 1L32；Ibid describe；
The other end of the 11st inductance 1L11 connects one end of the 1st inductance 1L00, and the 21st inductance 1L22's is another
End connects the other end of the 1st inductance 1L00；
One end of the inductive load connects the midpoint of the 1st inductance 1L00, and the other end of the 1st inductance 1L00 connects institute
One end of protective resistance RS01 is stated, the other end of the protective resistance RS01 connects the other end and of the 11st rectification circuit
The other end of 21 rectification circuits.
2. three phase full wave rectification ultralow frequency demagnetization circuit as described in claim 1, it is characterised in that: further include that multiple parallel connections connect
The 1st rectification circuit connect.
3. three phase full wave rectification ultralow frequency demagnetization circuit as claimed in claim 2, it is characterised in that: the 1st rectification circuit
Quantity be 3.
4. three phase full wave rectification ultralow frequency demagnetization circuit as described in claim 1, it is characterised in that: further include that multiple parallel connections connect
The 2nd rectification circuit connect.
5. three phase full wave rectification ultralow frequency demagnetization circuit as described in claim 1, it is characterised in that: the 2nd rectification circuit
Quantity be 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821575339.4U CN209170239U (en) | 2018-09-27 | 2018-09-27 | A kind of three phase full wave rectification ultralow frequency demagnetization circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821575339.4U CN209170239U (en) | 2018-09-27 | 2018-09-27 | A kind of three phase full wave rectification ultralow frequency demagnetization circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209170239U true CN209170239U (en) | 2019-07-26 |
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ID=67332123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821575339.4U Active CN209170239U (en) | 2018-09-27 | 2018-09-27 | A kind of three phase full wave rectification ultralow frequency demagnetization circuit |
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| Country | Link |
|---|---|
| CN (1) | CN209170239U (en) |
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2018
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