CN209625959U - A kind of direct current inverse-excitation type pulse degaussing gear - Google Patents
A kind of direct current inverse-excitation type pulse degaussing gear Download PDFInfo
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- CN209625959U CN209625959U CN201920357147.4U CN201920357147U CN209625959U CN 209625959 U CN209625959 U CN 209625959U CN 201920357147 U CN201920357147 U CN 201920357147U CN 209625959 U CN209625959 U CN 209625959U
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- 230000005347 demagnetization Effects 0.000 claims abstract description 51
- 238000001914 filtration Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
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- 230000001276 controlling effect Effects 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
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- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
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- 239000003990 capacitor Substances 0.000 description 2
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- 238000004146 energy storage Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
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- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
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- 230000005381 magnetic domain Effects 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The utility model discloses a kind of direct current inverse-excitation type pulse degaussing gears, comprising: control circuit module, power output module and demagnetization module, wherein control circuit module, for mains-power circuit to be converted to pulse signal by PWM modulation；Power output module for receiving the pulse signal, and motivates MOS power tube mode control switch power supply by transformer and exports erasing current；Demagnetization module completes demagnetization for receiving erasing current, and by erasing current.By the technical solution of application the application, demagnetization efficiency can be improved to offset the magnetism of former pipeline using DC pulse magnetic field using the hysteresis characteristic of ferrimagnet, while reach energy saving purpose.
Description
Technical field
The present invention relates to circuit field, in particular to a kind of direct current inverse-excitation type pulse degaussing gear.
Background technique
In the process of running, because of processes such as geomagnetic noise, Magnetic Flux Leakage Inspectings, working pipeline is often by magnetic for long-distance oil & gas pipeline
Change, in repair welds, if the remanent magnetism with magnetic long distance pipeline cannot be eliminated in time, it will generate arc blow and influence to weld matter
Amount, or even can not weld.For stabilized welding process, improve quality of weld joint, the steel pipe being magnetized is used before welding
Demagnetizer carries out demagnetization.Demagnetization at present uses two ways, i.e. AC erasing and dc erasing substantially.AC erasing is to utilize
The alternating magnetic field constantly converted overcomes the intrinsic coercivity with magnetic material, upsets rule compositor magnetic domain to reach demagnetization purpose；
Dc erasing is to generate a reversed magnetic using direct current to overcome the coercivity with magnetic material, is generated by external dc equal in magnitude
Contrary magnetic field shows demagnetization position magnetic induction intensity externally.
Long distance pipeline is then tens kilometers short, long then several hundred kilometers, if only eliminating pipeline welding ends using AC erasing
Mouth is inadequate, because distal end also " can pass " quickly after the magnetism of elimination pipe end, is remagnetized, it is necessary to right
Whole pipeline carries out demagnetization, and carries out demagnetization to the pipeline of whole dozens of kilometres, other than workload is huge, tie up repairing when
Effect property does not also allow.And dc erasing is then on the contrary, generate contrary equal-sized reversed excitation magnetic field cancellation using direct current
Former pipeline magnetic field, makes welding position not show magnetism externally, is suitable for welding, without eliminating the magnetism of whole pipeline, this
Sample just significantly reduces workload.
However, it is found by the inventors that dc erasing technology in the prior art is only simple to generate reversed excitation magnetic field, disappear
Magnetic efficiency need to be improved.
Summary of the invention
The present invention provides a kind of direct current inverse-excitation type pulse degaussing gear, how to mention under the premise of more energy-efficient to solve
High pipeline demagnetization efficiency.The device includes: control circuit module, power output module and demagnetization module, wherein
The control circuit module, for mains-power circuit to be converted to pulse signal by PWM modulation；
The power output module motivates the mode control of MOS power tube for receiving the pulse signal, and by transformer
Switching Power Supply processed simultaneously exports erasing current；
The demagnetization module completes demagnetization for receiving the erasing current, and by the erasing current.
Preferably, the control circuit module, specifically includes: auxiliary circuit and governor circuit, wherein
The auxiliary circuit for receiving electric network source, and exports stable low-voltage dc power supply by filter rectification；
The governor circuit, for receiving electric network source and the low-voltage dc power supply, by control electric network source into
Row rectifying and wave-filtering obtains power supply to be processed, carries out power conversion to power supply to be processed according to the low-voltage dc power supply, and by function
Power supply after rate conversion is as pulse signal.
Preferably, the auxiliary circuit, specifically includes: power grid filter rectifier, switching circuit, power filter rectified current
Road and voltage regulator circuit, wherein
The power grid filter rectifier is straight for will provide first to the switching circuit after electric network source filter rectification
Galvanic electricity source；
The switching circuit, for handling first DC power supply and exporting secondary induced potential to the power filter
Rectification circuit；
The power filter rectification circuit, for exporting the second direct current after the secondary induced potential is carried out rectifying and wave-filtering
Power supply；
The voltage regulator circuit, for stablizing second direct current power source voltage.
Preferably, the governor circuit, specifically includes: reference voltage generating circuit, oscillating circuit, intermittent phase adjustment circuit
And output circuit, wherein
The reference voltage generating circuit, for receiving electric network source and electric network source being converted to reference voltage power supply；
The oscillating circuit, for receiving reference voltage power supply and exporting oscillating voltage to the intermittent phase adjustment circuit；
The intermittent phase adjustment circuit, for when detecting that oscillating voltage exports unstable to the adjustment of oscillating voltage；
The output circuit, for receiving oscillating voltage adjusted and output pulse signal.
Preferably, the power output module, specifically includes: power expands stream output circuit, transformer exciting circuit and whole
Current circuit, wherein
The power expands stream output circuit, for handling pulse signal, and uses symmetrical push-pull output mode output signal,
So that DC power supply enters the transformer exciting circuit according to the output signal；
The transformer exciting circuit, for handling the DC power supply and exporting pulse current；
The rectification circuit, for rectifying the output pulse current and exporting the erasing current.
Preferably, the demagnetization module, specifically includes: degaussing controller and anti-magnetized coil, wherein
The degaussing controller, for being unmagnetized the magnetic induction intensity of pipeline using gaussmeter measurement and judging polarity, and
Control the erasing current connection of anti-magnetized coil；
The anti-magnetized coil, for completing itself demagnetization using erasing current.
Compared with prior art, the advantageous effects for the technical solution that the embodiment of the present application is proposed include:
The invention discloses a kind of direct current inverse-excitation type pulse degaussing gears, comprising: control circuit module, power output module
With demagnetization module, wherein control circuit module, for mains-power circuit to be converted to pulse signal by PWM modulation；Power output
Module for receiving the pulse signal, and motivates MOS power tube mode control switch power supply by transformer and exports demagnetization
Electric current；Demagnetization module completes demagnetization for receiving erasing current, and by erasing current.Pass through the technical side of application the application
Case can improve demagnetization using DC pulse magnetic field using the hysteresis characteristic of ferrimagnet to offset the magnetism of former pipeline
Efficiency, while reaching energy saving purpose.
Detailed description of the invention
A kind of structural schematic diagram for direct current inverse-excitation type pulse degaussing gear that Fig. 1 is proposed by the embodiment of the present application；
A kind of main circuit schematic diagram for direct current inverse-excitation type pulse degaussing gear that Fig. 2 is proposed by the embodiment of the present application；
A kind of auxiliary circuit schematic diagram for direct current inverse-excitation type pulse degaussing gear that Fig. 3 is proposed by the embodiment of the present application；
A kind of main control chip built-in function for direct current inverse-excitation type pulse degaussing gear that Fig. 4 is proposed by the embodiment of the present application
Schematic diagram；
A kind of governor circuit schematic diagram for direct current inverse-excitation type pulse degaussing gear that Fig. 5 is proposed by the embodiment of the present application；
A kind of power output circuit for direct current inverse-excitation type pulse degaussing gear that Fig. 6 is proposed by the embodiment of the present application is illustrated
Figure；
A kind of anti-magnetized coil schematic diagram for direct current inverse-excitation type pulse degaussing gear that Fig. 7 is proposed by the embodiment of the present application.
Specific embodiment
As the application background technique is stated, AC erasing is due to needing to carry out whole pipeline in the prior art
Demagnetization, and demagnetization is carried out to the pipeline of whole dozens of kilometres, other than workload is huge, the timeliness for tieing up repairing does not also permit
Perhaps.Although and dc erasing in the prior art generates contrary equal-sized reversed excitation magnetic field cancellation original using direct current
Pipeline magnetic field makes welding position not show magnetism externally, so as to not have to the magnetism for eliminating whole pipeline, thus significantly reduces
Workload.But dc erasing technology in the prior art is only simple to generate reversed excitation magnetic field, demagnetization efficiency need
It improves.
Present inventor wishes the hysteresis characteristic that can use ferrimagnet by device provided herein
Demagnetization efficiency is improved to offset the magnetism of former pipeline using DC pulse magnetic field, while reaching energy saving purpose.
As shown in Figure 1, a kind of structural representation of the direct current inverse-excitation type pulse degaussing gear proposed by the embodiment of the present application
Figure, the device include: control circuit module, power output module and demagnetization module, wherein
The control circuit module 101, for mains-power circuit to be converted to pulse signal by PWM modulation；
The power output module 102 motivates the power tube side MOS for receiving the pulse signal, and by transformer
Formula control switch power supply simultaneously exports erasing current；
The demagnetization module 103 completes demagnetization for receiving the erasing current, and by the erasing current.
Specifically, the degaussing power system in this degaussing gear is by the main control circuit of Switching Power Supply and power output two
It is grouped as.Main control circuit is substantially carried out PWM modulation and output pulse signal, and power output part is substantially carried out that recommend expansion stream defeated
Out.Main control part is by adjusting output duty cycle, to realize from zero stepless adjustable pulse output, in order to accurately control
The voltage output of switching circuit, this degaussing power system use the working condition of pulse width modulation mode (PWM) regulating switch pipe.
Pulse output circuit is inputted into demagnetization module later, pipeline demagnetization is completed by the anti-magnetized coil in demagnetization module.
It should be noted that above embodiments are only rather than the limitation ot it to illustrate technical solution of the present invention.To the greatest extent
Pipe is with reference to the foregoing embodiments described in detail invention, those skilled in the art should understand that: it is still
It can modify to technical solution documented by previous embodiment, or equivalent replacement of some of the technical features；
And these are modified or replaceed, the embodiment of the present invention technical solution that it does not separate the essence of the corresponding technical solution spirit and
Protection scope.
Further, it is exported to reach stablizing for pulse signal, in concrete application scene, the control circuit mould
Block specifically includes: auxiliary circuit and governor circuit, wherein the auxiliary circuit, for receiving electric network source, and it is whole by filtering
Stream exports stable low-voltage dc power supply；The governor circuit leads to for receiving electric network source and the low-voltage dc power supply
It crosses control electric network source progress rectifying and wave-filtering and obtains power supply to be processed, power supply to be processed is carried out according to the low-voltage dc power supply
Power conversion, and the power supply after power is converted is as pulse signal.
It should be noted that in the application specific embodiment, the effect of the auxiliary circuit be to main control circuit,
Driving circuit provides stable low-tension supply.Guarantee the reliable and stable work of control circuit, driving circuit.It is required to export
The direct current of voltage regulation of 20V.Main control chip in present apparatus governor circuit is the voltage driven type pulse width modulator of TI company production
(ULN8186), it can be used in the systems such as display, computer as switching power circuit, the output triode of ULN8186 can connect
At emitter and emitter follower two ways, the mode of both-end push-pull output or Single-end output can choose, recommend if being used in
When output, the driving pulse of two-way differs 180 degree, and is with the same phase of frequency in its single-ended two-way driving pulse.Therefore, as long as can reach
The application is had no effect on to the accessory power supply that can stablize output low voltage direct current and the main control chip for reaching effect same
Protection scope.
Specifically, in order to preferably obtain low pressure stabling current, in concrete application scene, the auxiliary circuit, specifically
It include: power grid filter rectifier, switching circuit, power filter rectification circuit and voltage regulator circuit, wherein power grid filtering is whole
Current circuit, for the first DC power supply will to be provided to the switching circuit after electric network source filter rectification；The switching circuit is used
In processing first DC power supply and secondary induced potential is exported to the power filter rectification circuit；The power filter is whole
Current circuit, for exporting the second DC power supply after the secondary induced potential is carried out rectifying and wave-filtering；The voltage regulator circuit, is used for
Stablize second direct current power source voltage.
Specifically, exported to preferably complete stablizing for pulse signal, in concrete application scene, the master control electricity
Road specifically includes: reference voltage generating circuit, oscillating circuit, intermittent phase adjustment circuit and output circuit, wherein the benchmark
Voltage generation circuit, for receiving electric network source and electric network source being converted to reference voltage power supply；The oscillating circuit, is used for
It receives reference voltage power supply and exports oscillating voltage to the intermittent phase adjustment circuit；The intermittent phase adjustment circuit is used for
Detect adjustment when oscillating voltage exports unstable to oscillating voltage；The output circuit, for receiving oscillation adjusted
Voltage and output pulse signal.
It should be noted that above embodiments are only rather than the limitation ot it to illustrate technical solution of the present invention.To the greatest extent
Pipe is with reference to the foregoing embodiments described in detail invention, those skilled in the art should understand that: it is still
It can modify to technical solution documented by previous embodiment, or equivalent replacement of some of the technical features；
And these are modified or replaceed, the embodiment of the present invention technical solution that it does not separate the essence of the corresponding technical solution spirit and
Protection scope.
Further, in order to pulse signal to be converted to qualified erasing current, in concrete application scene, the power
Output module specifically includes: power expands stream output circuit, transformer exciting circuit and rectification circuit, wherein the power expands stream
Output circuit for handling pulse signal, and uses symmetrical push-pull output mode output signal, so that DC power supply is according to
Output signal enters the transformer exciting circuit；The transformer exciting circuit, for handling the DC power supply and exporting
Pulse current；The rectification circuit, for rectifying the output pulse current and exporting the erasing current.
It should be noted that power output part motivates MOS power tube mode using transformer, such mode can be to avoid
In the case where the damage of individual MOS power tubes, secondary damage exciter tube.MOS power tube uses parallel operation, to increase output work
Rate.Receive the pulse signal from driver unit after, transformer secondary output be divided to two groups export offer to MOS power tube signal pushed away
Draw output.Power output uses amorphous alloy transformer to improve the stability of system.It is made of voltage-stabiliser tube, diode and resistance
The input protection circuit of power output switching tube plays quick cut-off, and protective effect.Capacitor and resistance form peak absorbing
Network, make switching tube works in safe condition.Inverter power output circuit is formed by MOS power tube.The output of the circuit, warp
Capacitor plays blocking driving 3 transformers connected in parallel decompression in parallel and exports DC current after fast recovery rectifier diode Half bridge rectifier
For the erasing current of 300A.
Further, in order to complete final demagnetization step, in concrete application scene, the demagnetization module is specific to wrap
It includes: degaussing controller and anti-magnetized coil, wherein the degaussing controller, for being unmagnetized the magnetic of pipeline using gaussmeter measurement
Induction simultaneously judges polarity, and controls the erasing current connection of anti-magnetized coil；The anti-magnetized coil, for utilizing erasing current
Complete itself demagnetization.
It should be noted that being unmagnetized the magnetic induction intensity of pipeline simultaneously using gaussmeter measurement in concrete application scene
Judge polarity.Pipe head is being unmagnetized around anti-magnetized coil, coiling should be close to end one end of demagnetization.By anti-magnetized coil and demagnetization
Controller docking.Degaussing controller is adjusted, while measuring detection with gaussmeter, the magnetic induction intensity of pipe end should be gradually
Reduce, until being reduced to zero.It keeps erasing current to stablize, is welded.
Compared with prior art, the advantageous effects for the technical solution that the embodiment of the present application is proposed include:
The invention discloses a kind of direct current inverse-excitation type pulse degaussing gears, comprising: control circuit module, power output module
With demagnetization module, wherein control circuit module, for mains-power circuit to be converted to pulse signal by PWM modulation；Power output
Module for receiving the pulse signal, and motivates MOS power tube mode control switch power supply by transformer and exports demagnetization
Electric current；Demagnetization module completes demagnetization for receiving erasing current, and by erasing current.Pass through the technical side of application the application
Case can improve demagnetization using DC pulse magnetic field using the hysteresis characteristic of ferrimagnet to offset the magnetism of former pipeline
Efficiency, while reaching energy saving purpose.
Below in conjunction with the attached drawing in the application, clear, complete description is carried out to the technical solution in the application, is shown
So, described embodiment is a part of the embodiment of the application, instead of all the embodiments.Based on the implementation in the application
Example, those of ordinary skill in the art's every other embodiment obtained without making creative work, all belongs to
In the range of the application protection.
As illustrated in figs. 2-7, a kind of direct current inverse-excitation type pulse degaussing gear main circuit diagram proposed by the embodiment of the present application
And each parallel circuit, 2-7 further illustrates the implementation steps of degaussing gear with reference to the accompanying drawing.
Overall system design
Hardware is by input and output current rectifying and wave filtering circuit, power conversion part, driving circuit and auxiliary circuit etc.
A few part compositions.
Switching Power Supply main circuit design
Switching Power Supply main circuit is the conversion for completing DC-AC-DC, and system main circuit is converted using bridge-type DC-DC
Device makees the heart driving source of the power supply using Switching Power Supply drive module ULN8186.Output voltage 40V electric current 300A, in circuit
Middle to use power protection and two schemes of overcurrent protection, it is more than that input power compares input voltage that power protection, which is in input current,
In the case where start to protect, show as that output electric current maintains that a range is constant and output voltage declines.As shown in Figure 2.
Control circuit hardware design
Accessory power supply, as shown in Figure 3.
The effect of the accessory power supply is that stable low-tension supply is provided to main control circuit, driving circuit.Guarantee control
The reliable and stable work of circuit, driving circuit.It is required to the direct current of voltage regulation of output 20V.
1, start:
Power supply is powered by 1 coil of primary of R1 and T to switching tube Q5, at this point, switching tube is connected.
2, energy storage:
After Q9 conducting, power supply is energized to transformer T, and energy is stored in transformer in the form of magnetic energy.The pole of N1
Property be it is upper just lower negative, N2 polarity be it is lower just upper negative, diode D3 is reversed, and N2 no current passes through.
3, it turns off:
After Q9 conducting, electric current is through switching tube Q9, R4 to ground, and due to the effect of N1 inductance, electric current is ascending rising,
Then the voltage on resistance R4 is equally ascending rising, when voltage value rises to a certain extent (about 0.7V), triode
Q10 conducting, the grid potential of switching tube Q9 is pulled low rapidly.Switching tube Q5 ends at this time.
4, exoergic:
After switching tube shutdown, since the energy storage afterflow of inductance coil N1 acts on, the lower end N1 voltage can rise beyond power supply electricity
Pressure, polarity become lower just upper negative, and diode D2 conducting is discharged by C3, R9.At this time the induced electromotive force polarity of N2 become it is upper just
Lower negative, powering load is connected in diode D3, while charging to C10, and the magnetic energy of transformer is discharged by secondary pole N2.
5, open-minded again:
When the energy of transformer is put into a certain degree, the lower end N1 current path to supply voltage, due to the afterflow of inductance
Effect, the lower end N1 voltage can be lower than supply voltage, i.e. the end voltage of Q9 is lower than supply voltage, causes power supply again by coil
N1 powers to Q9, generates downward electric current.Q9 is connected again, and power supply fills energy to transformer again, constantly forms concussion repeatedly.
6, pressure stabilizing:
When output voltage is more than 20V, photoelectrical coupler is connected by U3, R25 in electric current, triode Q10 conducting, will
The grid potential of switching tube Q9 is pulled low rapidly, and switching tube ends in advance.So that output is maintained at 20V, achieve the purpose that pressure stabilizing.
Main control chip, as shown in Figure 4.
This circuit main control chip is the voltage driven type pulse width modulator of TI company production, available as switching power circuit
In the systems such as display, computer, the output triode of ULN8186 can be connected into emitter and emitter follower two ways,
It can choose the mode of both-end push-pull output or Single-end output, if be used in push-pull output, the driving pulse difference 180 of two-way
Degree, and be with the same phase of frequency in its single-ended two-way driving pulse.
The function and feature of ULN8186
ULN8186 functional block diagram is as shown in figure 4, pin function is as follows:
1 foot is the non-inverting input terminal of application condition amplifier.
2 feet are the inverting input terminal of application condition amplifier.
3 feet are the public output for controlling comparison amplifier and application condition amplifier, and when output shows as or export control
Characteristic processed, that is, just in two amplifiers, the big person of output amplitude is worked.When the level of 3 feet is got higher, ULN8186 is sent
Driving pulse width out narrows, and when 3 foot level are low, driving pulse width broadens.
4 feet are dead zone level control terminal, and dead zone function voltage, which is added, from 4 feet to control the maximum width of driving pulse
System makes it be no more than 180 degree, can protect the triode in switching power circuit in this way.
5 feet are used for external oscillation resistance.
6 feet are used for external oscillating capacitance.
7 feet are ground terminal.
8,9 feet are the collector of two output triodes of ULN8186 content final stage.
11,10 feet are the emitter of two output triodes of ULN8186 content final stage.
12 feet are power supply side.
13 feet are function control end.
14 feet are internal 5V reference voltage output end.
15 feet are the inverting input terminal for controlling comparison amplifier.
16 feet are the non-inverting input terminal for controlling comparison amplifier.
Governor circuit design, as shown in Figure 5.
Main control part is and to be realized from zero stepless adjustable pulse output by adjusting output duty cycle, in order to accurate
The voltage output of control switch circuit, this system use the working condition of pulse width modulation mode regulating switch pipe.ULN8186's is interior
Portion's circuit is compared by reference voltage generating circuit, oscillating circuit, intermittent phase adjustment circuit, two error amplifiers, pulsewidth modulations
The composition such as device and output circuit.
Found out by Fig. 4 pin figure, wherein 1,2 feet are the same phases and inverting input terminal of error amplifier I；3 feet are phase schools
Just controlled with gain；4 feet are intermittent phase conditioning, thereon plus when 0~3.3V voltage can make deadline from 2% linear change to
100%, this circuit is ground connection 0V；5,6 feet are respectively used to external oscillation resistance and oscillating capacitance, this circuit design is 22KHz；7
Foot is ground terminal；8,9 feet and 11,10 feet are respectively two final stage output triode collector and emitters inside ULN8186；12
Foot is power supply side；13 feet are output control terminal, are Single-end output mode in parallel when which is grounded, recommend when connecing 14 foot defeated
Mode out；14 feet are 5V reference voltage output end, maximum output current 10mA；15,16 feet be error amplifier II reverse phase and
Non-inverting input terminal.
There are two error amplifiers of I, II in the inside, and the voltage and current signals of power output part, P3 are acquired by P3, P4
The non-inverting input terminal that acquisition output current value inputs 16 feet is used as overcurrent protection, and P4 acquires output voltage and inputs the same phase of 2 feet
Input terminal adjusts the control of output duty cycle for voltage control, voltage.
1 foot meets voltage output end P4 by resistance R34, R36, and 2 feet connect the output of reference voltage by R31, R40, if
The output voltage of reference voltage is greater than feedback voltage, and the level of error comparator output will be relatively low, the duty ratio at this moment exported
It will will increase, feedback end voltage can also improve accordingly, so that the output level of error amplifier be made to get higher, at this moment duty ratio will
It can reduce, until stablizing.15 feet connect current detecting end P3,15 foot by R28 and connect current detecting output by R28, R39, R32
Pressure drop end, 16 feet connect reference voltage by R27 and export, if the output voltage of reference voltage is greater than feedback current pressure drop voltage,
The level for controlling amplifier output will be relatively low, and the duty ratio at this moment exported will will increase, and feedback end current voltage drop is accordingly
It can improve, so that the output level for controlling amplifier be made to get higher, at this moment duty ratio will reduce, until stablizing.The vibration of ULN8186
It swings signal to export from 8 feet and 11 feet respectively, is added to the pole b of push-pull drive pipe Q1, Q2, be allowed to alternate conduction, and the power supply of two pipes
It is derived from the 24V of accessory power supply, through D17, R13 rectification and T1 armature winding are added separately to two poles pipe c.
The induced potential of T1 grade is added to Q3 through D18, R19, R14 respectively, and the pole b of Q4 is added to through D19, R15, R21, is made
Alternate conduction.In Q3 conducting, supply voltage is through Q3c-e, T2 armature winding, C26, C27 and discharge, in Q2 conducting,
Armature winding of the charging voltage through B1 on C26, C27, the c-e of Q2 and discharge.
C29, D18, R14 and C30, D19, R15 separately constitute accelerating circuit, accelerate Q3, and the on and off of Q4 reduces
The power consumption of pipe.
T2 secondary windings output drive signal, with driving power unit.
Power output part, as shown in Figure 6.
Power output part motivates MOS power tube mode using transformer, and such mode can be to avoid in individual MOS power
In the case that pipe damages, secondary damage exciter tube.MOS power tube uses parallel operation, to increase output power.
After P1, P2 receive the pulse signal from driver unit, the two groups of outputs of T6 fraction provide letter to MOS power tube
Number carry out push-pull output.T3, T4, T5 power output use amorphous alloy transformer to improve the stability of system.
Voltage-stabiliser tube ZD1~ZD4, diode D23~D26 and resistance R49, R50, R51, R52 form power output switching tube
Input protection circuit, play quick cut-off, and protective effect.Element C45~C48 and R41, R42, R59, R60 and composition
Peak absorbing network, make switching tube works in safe condition.
Inverter power output circuit is formed by MOS power tube Q5~Q6.The output of the circuit plays blocking through C49~C51
Driving 3 transformer T3, T4, T5 parallel connections decompression in parallel exports direct current after fast recovery rectifier diode half-bridge D27 rectification
Stream is the erasing current of 300A.
Anti-magnetized coil, as shown in Figure 7.
The design of anti-magnetized coil
The simplified formula of magnetic field strength is that (H is magnetic field strength, unit A/m to H=N*I/Le；N is the circle of magnet exciting coil
Number；I is exciting current (measured value), unit position A；Le is the effective magnetic circuit length of test sample, unit m).Anti-magnetized coil is wanted
Consider two factors: first is that the number of turns and length of anti-magnetized coil, second is that the redundant electric flow valuve of anti-magnetized coil.And the length of anti-magnetized coil
Spend it is directly proportional with resistance, one timing of voltage is inversely proportional with current value, thus design when will according to the resistivity of material, line footpath, around
The number of line mode and braided wire wire rod is calculated, and optimum value is obtained.
Coil connection
To improve security feature, it is attached using explosion-proof aviation head, to guarantee the resistance value of entire anti-magnetized coil reasonable
In range, the lead resistance value of anti-magnetized coil should be taken into account.
Compared with prior art, the advantageous effects for the technical solution that the embodiment of the present application is proposed include:
The invention discloses a kind of direct current inverse-excitation type pulse degaussing gears, comprising: control circuit module, power output module
With demagnetization module, wherein control circuit module, for mains-power circuit to be converted to pulse signal by PWM modulation；Power output
Module for receiving the pulse signal, and motivates MOS power tube mode control switch power supply by transformer and exports demagnetization
Electric current；Demagnetization module completes demagnetization for receiving erasing current, and by erasing current.Pass through the technical side of application the application
Case can improve demagnetization using DC pulse magnetic field using the hysteresis characteristic of ferrimagnet to offset the magnetism of former pipeline
Efficiency, while reaching energy saving purpose.
Through the above description of the embodiments, those skilled in the art can be understood that the embodiment of the present application
The mode of necessary general hardware platform can also be added to realize by software by hardware realization.Based on such reason
Solution, the technical solution of the embodiment of the present application can be embodied in the form of software products, which can store one
In a non-volatile memory medium (can be CD-ROM, USB flash disk, mobile hard disk etc.), including some instructions are used so that a meter
It calculates machine equipment (can be personal computer, server or network side equipment etc.) and executes each implement scene of the embodiment of the present application
The method.
It will be appreciated by those skilled in the art that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, module in attached drawing or
Process is not necessarily implemented necessary to the embodiment of the present application.
It will be appreciated by those skilled in the art that the module in device in implement scene can be described according to implement scene into
Row is distributed in the device of implement scene, can also be carried out corresponding change and is located at the one or more dresses for being different from this implement scene
In setting.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
Above-mentioned the embodiment of the present application serial number is for illustration only, does not represent the superiority and inferiority of implement scene.
Disclosed above is only several specific implementation scenes of the embodiment of the present application, and still, the embodiment of the present application is not office
It is limited to this, the changes that any person skilled in the art can think of should all fall into the business limitation range of the embodiment of the present application.
Claims (6)
1. a kind of direct current inverse-excitation type pulse degaussing gear characterized by comprising control circuit module, power output module and
Demagnetization module, wherein
The control circuit module, for mains-power circuit to be converted to pulse signal by PWM modulation；
The power output module motivates MOS power tube mode to control out for receiving the pulse signal, and by transformer
Powered-down source simultaneously exports erasing current；
The demagnetization module completes demagnetization for receiving the erasing current, and by the erasing current.
2. direct current inverse-excitation type pulse degaussing gear as described in claim 1, which is characterized in that the control circuit module, tool
Body includes: auxiliary circuit and governor circuit, wherein
The auxiliary circuit for receiving electric network source, and exports stable low-voltage dc power supply by filter rectification；
The governor circuit is carried out whole for receiving electric network source and the low-voltage dc power supply by control electric network source
Stream filtering obtains power supply to be processed, carries out power conversion to power supply to be processed according to the low-voltage dc power supply, and power is turned
Power supply after changing is as pulse signal.
3. direct current inverse-excitation type pulse degaussing gear as claimed in claim 2, which is characterized in that the auxiliary circuit, it is specific to wrap
It includes: power grid filter rectifier, switching circuit, power filter rectification circuit and voltage regulator circuit, wherein
The power grid filter rectifier, for the first direct current will to be provided to the switching circuit after electric network source filter rectification
Source；
The switching circuit is rectified for handling first DC power supply and exporting secondary induced potential to the power filter
Circuit；
The power filter rectification circuit, for exporting the second direct current after the secondary induced potential is carried out rectifying and wave-filtering
Source；
The voltage regulator circuit, for stablizing second direct current power source voltage.
4. direct current inverse-excitation type pulse degaussing gear as claimed in claim 2, which is characterized in that the governor circuit, it is specific to wrap
It includes: reference voltage generating circuit, oscillating circuit, intermittent phase adjustment circuit and output circuit, wherein
The reference voltage generating circuit, for receiving electric network source and electric network source being converted to reference voltage power supply；
The oscillating circuit, for receiving reference voltage power supply and exporting oscillating voltage to the intermittent phase adjustment circuit；
The intermittent phase adjustment circuit, for when detecting that oscillating voltage exports unstable to the adjustment of oscillating voltage；
The output circuit, for receiving oscillating voltage adjusted and output pulse signal.
5. direct current inverse-excitation type pulse degaussing gear as described in claim 1, which is characterized in that the power output module, tool
Body includes: that power expands stream output circuit, transformer exciting circuit and rectification circuit, wherein
The power expands stream output circuit, for handling pulse signal, and uses symmetrical push-pull output mode output signal, so that
DC power supply enters the transformer exciting circuit according to the output signal；
The transformer exciting circuit, for handling the DC power supply and exporting pulse current；
The rectification circuit, for rectifying the output pulse current and exporting the erasing current.
6. direct current inverse-excitation type pulse degaussing gear as described in claim 1, which is characterized in that the demagnetization module is specific to wrap
It includes: degaussing controller and anti-magnetized coil, wherein
The degaussing controller for being unmagnetized the magnetic induction intensity of pipeline using gaussmeter measurement and judging polarity, and is controlled
The erasing current of anti-magnetized coil connects；
The anti-magnetized coil, for completing itself demagnetization using erasing current.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920357147.4U CN209625959U (en) | 2019-03-20 | 2019-03-20 | A kind of direct current inverse-excitation type pulse degaussing gear |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920357147.4U CN209625959U (en) | 2019-03-20 | 2019-03-20 | A kind of direct current inverse-excitation type pulse degaussing gear |
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| CN209625959U true CN209625959U (en) | 2019-11-12 |
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ID=68457274
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| CN201920357147.4U Expired - Fee Related CN209625959U (en) | 2019-03-20 | 2019-03-20 | A kind of direct current inverse-excitation type pulse degaussing gear |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224626A (en) * | 2019-03-29 | 2019-09-10 | 廊坊开发区锐研电子技术有限公司 | A kind of direct current inverse-excitation type impulse type demagnetization governor circuit |
| CN111029082A (en) * | 2019-11-27 | 2020-04-17 | 中国电力科学研究院有限公司 | Device and method for eliminating residual magnetism of transformer core and outputting constant-voltage variable-frequency voltage |
| CN111308256A (en) * | 2020-03-30 | 2020-06-19 | 中国船舶重工集团公司第七0四研究所 | Error analysis test system and method for degaussing system |
-
2019
- 2019-03-20 CN CN201920357147.4U patent/CN209625959U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224626A (en) * | 2019-03-29 | 2019-09-10 | 廊坊开发区锐研电子技术有限公司 | A kind of direct current inverse-excitation type impulse type demagnetization governor circuit |
| CN111029082A (en) * | 2019-11-27 | 2020-04-17 | 中国电力科学研究院有限公司 | Device and method for eliminating residual magnetism of transformer core and outputting constant-voltage variable-frequency voltage |
| CN111029082B (en) * | 2019-11-27 | 2023-02-28 | 中国电力科学研究院有限公司 | Device and method for eliminating residual magnetism of transformer core and outputting constant-voltage variable-frequency voltage |
| CN111308256A (en) * | 2020-03-30 | 2020-06-19 | 中国船舶重工集团公司第七0四研究所 | Error analysis test system and method for degaussing system |
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