CN209659179U - A kind of direct current inverse-excitation type impulse type demagnetization power output circuit and degausser - Google Patents
A kind of direct current inverse-excitation type impulse type demagnetization power output circuit and degausser Download PDFInfo
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- CN209659179U CN209659179U CN201920357144.0U CN201920357144U CN209659179U CN 209659179 U CN209659179 U CN 209659179U CN 201920357144 U CN201920357144 U CN 201920357144U CN 209659179 U CN209659179 U CN 209659179U
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Abstract
This application discloses a kind of direct current inverse-excitation type impulse type demagnetization power output circuit and degaussers, applied in degaussing gear, it include: that power expands stream output circuit, transformer exciting circuit and rectification circuit, the power expands stream output circuit, for handling pulse signal, and symmetrical push-pull output mode output signal is used, 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 DC pulse erasing current, to the DC pulse erasing current for keeping the output of direct current inverse-excitation type impulse type degaussing gear qualified, guarantees the reliable and stable work of direct current inverse-excitation type impulse type degaussing gear, improve demagnetization efficiency.
Description
Technical field
This application involves circuit fields, and in particular to a kind of direct current inverse-excitation type impulse type demagnetization power output circuit and demagnetization
Machine.
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, and carries out demagnetization to the pipeline of whole dozens of kilometres and tie up the timeliness of repairing other than workload is huge
Also do not allow.And dc erasing is then different, generates contrary equal-sized reversed excitation magnetic field cancellation original pipe using direct current
Road magnetic field, makes welding position not show magnetism externally, is suitable for welding, without eliminating the magnetism of whole pipeline, thus
Significantly reduce 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
This application provides a kind of direct current inverse-excitation type impulse type demagnetization power output circuit and degaussers, so that direct current flyback
The qualified DC pulse erasing current of formula impulse type degaussing gear output, guarantees that direct current inverse-excitation type impulse type degaussing gear stabilization can
The work leaned on improves demagnetization efficiency.
In order to reach above-mentioned technical purpose, present applicant proposes a kind of direct current inverse-excitation type impulse type demagnetization power output electricity
Road is applied in degaussing gear, comprising: 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 DC pulse erasing current.
Preferably, the power expands stream output circuit, further includes: transformer and MOS power tube group, wherein
Four secondary coils of the transformer be separately connected four groups described in MOS power tube group, MOS power tube described in four groups
It is connected in parallel between group；
The transformer exciting circuit, further includes: driver transformer；
The transformer, for providing gate voltage to the MOS power tube group according to the pulse signal；
The MOS power tube group, for the DC power supply to be supplied to the driver transformer；
The driver transformer, the DC power supply for inputting primary coil export the pulse electricity through secondary coil
Stream.
Preferably, further includes: the first protection circuit and the second protection circuit, wherein
The first protection circuit, further includes: voltage-stabiliser tube, diode and resistance, after resistance described in the diodes in parallel
It connects with the voltage-stabiliser tube, transformer secondary coil and MOS power tube group described in the first protection circuit connection；
The second protection circuit further includes capacitor and resistance, and the capacitor is connected with the resistance, second protection
MOS power tube group both ends described in circuit connection；
The first protection circuit, for protecting the MOS power tube group by quickly cut-off；
The second protection circuit, for protecting the MOS power tube group by absorbing peak pulse.
Preferably, further includes: input filter circuit and output filter circuit, wherein
The input filter circuit, for being filtered to the DC power supply；
The output filter circuit, for filtering out the spike of the DC pulse erasing current.
Preferably, the driver transformer is specially amorphous alloy transformer.
Preferably, the rectification circuit is specially fast recovery rectifier diode half-bridge circuit.
The application also proposed a kind of degausser, including direct current inverse-excitation type impulse type demagnetization power output as described above electricity
Road, further includes: main control circuit, auxiliary power circuit and anti-magnetized coil, wherein
The main control circuit, for carrying out pulsewidth modulation, Xiang Suoshu direct current inverse-excitation type impulse type demagnetization power output electricity
Road output pulse signal；
The auxiliary power circuit, for providing stable low-tension supply to the main control circuit；
The anti-magnetized coil, it is complete when thereon by generating magnetic field when DC pulse erasing current for being mounted on pipeline
The demagnetization of twin conduit.
Compared with prior art, the advantageous effects for the technical solution that the embodiment of the present application is proposed include:
This application discloses a kind of direct current inverse-excitation type impulse type demagnetization power output circuit and degaussers, are applied to demagnetization and fill
In setting, comprising: power expands stream output circuit, transformer exciting circuit and rectification circuit, and the power expands stream output circuit, is used for
Pulse signal is handled, and uses symmetrical push-pull output mode output signal, so that DC power supply enters according to the output signal
The transformer exciting circuit；The transformer exciting circuit, for handling the DC power supply and exporting pulse current；It is described
Rectification circuit, for rectifying the output pulse current and exporting DC pulse erasing current, to make direct current inverse-excitation type pulse
The qualified DC pulse erasing current of type degaussing gear output, guarantees the reliable and stable work of direct current inverse-excitation type impulse type degaussing gear
Make, improves demagnetization efficiency.
Detailed description of the invention
Fig. 1 is a kind of structural representation for direct current inverse-excitation type impulse type demagnetization power output circuit that the embodiment of the present application proposes
Figure；
Fig. 2 is a kind of structural schematic diagram for direct current inverse-excitation type impulse type degaussing gear that the embodiment of the present application proposes；
Fig. 3 is the circuit diagram for the direct current inverse-excitation type impulse type demagnetization power output circuit that the embodiment of the present application proposes.
Specific embodiment
As the application background technique is stated, due to indefinite by earth magnetic effect and pipeline during pipeline performance
The Magnetic Flux Leakage Inspecting of phase, in-service pipeline nearly all band is magnetic, in repair welds, if the remanent magnetism with magnetic long distance pipeline cannot and
When eliminate, it will generate arc blow and influence welding quality, or even can not weld.For stabilized welding process, improvement is connect
Head quality, the steel pipe being magnetized carry out demagnetization with demagnetizer before welding.However, dc erasing technology in the prior art
Only simple to generate reversed excitation magnetic field, demagnetization efficiency need to be improved.
Present inventor proposes a kind of direct current inverse-excitation type impulse type degaussing gear, compared to pure dc erasing, utilizes
The hysteresis characteristic of ferrimagnet uses DC pulse magnetic field, and to offset the magnetism of former pipeline, efficiency is improved, and reaches energy saving mesh
's.
As shown in Fig. 2, the hardware components of the direct current inverse-excitation type impulse type degaussing gear are filtered by power grid filtering part, rectification
The compositions such as wave part, power conversion section, rectification output par, c, accessory power supply part, main control circuit part.
The technical solution of the application proposes a kind of direct current inverse-excitation type impulse type demagnetization function for above-mentioned power conversion section
Rate output circuit, the DC pulse erasing current for keeping the output of direct current inverse-excitation type impulse type degaussing gear qualified, guarantees direct current flyback
The reliable and stable work of formula impulse type degaussing gear improves demagnetization efficiency.
As shown in Figure 1, a kind of knot of the direct current inverse-excitation type impulse type demagnetization power output circuit proposed for application embodiment
Structure schematic diagram is applied in degaussing gear, is applied in degaussing gear, comprising: power expands stream output circuit, transformer excitation electricity
Road 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.
Specifically, direct current inverse-excitation type impulse type degaussing gear further includes main control circuit, main control circuit is substantially carried out PWM
(Pulse Width Modulation, pulse width modulation) modulation and output pulse signal, the power, which expands, flows output circuit
Return pulse signal, and recommend expansion stream output to pulse signal, make DC power supply according to recommend expand signal that stream exports into
Enter transformer exciting circuit, pulse current is exported by transformer exciting circuit.
Transformer exciting circuit is entered according to the signal for drawing expansion stream output for guarantee DC power supply and exports pulse current, In
In preferred embodiment of the present application, the power expands stream output circuit, further includes: transformer and MOS power tube group, wherein
Four secondary coils of the transformer be separately connected four groups described in MOS power tube group, MOS power tube described in four groups
It is connected in parallel between group；
The transformer exciting circuit, further includes: driver transformer；
The transformer, for providing gate voltage to the MOS power tube group according to the pulse signal；
The MOS power tube group, for the DC power supply to be supplied to the driver transformer；
The driver transformer, the DC power supply for inputting primary coil export the pulse electricity through secondary coil
Stream.
Specifically, pulse signal enters transformer, and time for passing through transformer according to the period of pulse signal
Grade coil provides gate voltage to MOS power tube group, so that DC power supply is supplied to driver transformer by MOS power tube group
Primary coil, and pulse current is exported in the secondary coil of driver transformer, wherein MOS power tube group uses parallel operation, with
Increase output power.
For the stability for improving system, in a preferred embodiment of the present application, the driver transformer is specially that amorphous closes
Golden transformer.
The rectification circuit, for rectifying the output pulse current and exporting DC pulse erasing current.
Specifically, since the pulse current of driver transformer output is alternating current, it is also necessary to by the rectification of rectification circuit
DC pulse erasing current could be exported.
To guarantee to export satisfactory DC pulse erasing current, need to carry out fast recovery rectifier, in the preferred of the application
In embodiment, the rectification circuit is specially fast recovery rectifier diode half-bridge circuit.
Specifically, in the practical application scene of the application, as shown in figure 3, the arteries and veins of driver transformer T3, T4, T5 output
It rushes electric current to rectify through fast recovery rectifier diode half-bridge D27, exports DC pulse erasing current.
To guarantee that the MOS power tube group works in safe condition, in a preferred embodiment of the present application, further includes: the
One protection circuit and the second protection circuit, wherein
The first protection circuit, further includes: voltage-stabiliser tube, diode and resistance, after resistance described in the diodes in parallel
It connects with the voltage-stabiliser tube, transformer secondary coil and MOS power tube group described in the first protection circuit connection；
The second protection circuit further includes capacitor and resistance, and the capacitor is connected with the resistance, second protection
MOS power tube group both ends described in circuit connection；
The first protection circuit, for protecting the MOS power tube group by quickly cut-off；
The second protection circuit, for protecting the MOS power tube group by absorbing peak pulse.
Specifically, transformer secondary coil and MOS power tube group described in the first protection circuit connection, by quickly ending guarantor
The MOS power tube group is protected, institute is protected by absorbing peak pulse in MOS power tube group both ends described in the second protection circuit connection
State MOS power tube group.In the practical application scene of the application, as shown in figure 3, voltage-stabiliser tube ZD1~ZD4, diode D23~
The input protection circuit of D26 and resistance R49, R50, R51, R52 composition MOS power tube group, play quick cut-off, and protection
Effect.Capacitor C45~C48 and resistance R41, R42, R59, R60 form peak absorbing network, and MOS power tube group is made to work in peace
Total state.
To guarantee that the parameter of DC power supply and DC pulse erasing current meets the requirements, need to be filtered it, at this
In the preferred embodiment of application, further includes: input filter circuit and output filter circuit, wherein
The input filter circuit, for being filtered to the DC power supply；
The output filter circuit, for filtering out the spike of the DC pulse erasing current.
Specifically, being filtered by input filter circuit to the DC power supply, institute is filtered out by output filter circuit
State the spike of DC pulse erasing current.
In the practical application scene of the application, as shown in figure 3, power supply 300V DC power supply capacitor C12, C13, C43,
Operating voltage is provided after C44 filtering, capacitor C36 filters out spike, keeps pulse smooth.
The application also proposed a kind of degausser, including direct current inverse-excitation type impulse type demagnetization power output as described above electricity
Road, further includes: main control circuit, auxiliary power circuit and anti-magnetized coil, wherein
The main control circuit, for carrying out pulsewidth modulation, Xiang Suoshu direct current inverse-excitation type impulse type demagnetization power output electricity
Road output pulse signal；
The auxiliary power circuit, for providing stable low-tension supply to the main control circuit；
The anti-magnetized coil, it is complete when thereon by generating magnetic field when DC pulse erasing current for being mounted on pipeline
The demagnetization of twin conduit.
Specifically, direct current inverse-excitation type impulse type demagnetization auxiliary power circuit provides stable low tension to main control circuit
Source, main control circuit carry out pulsewidth modulation, and Xiang Suoshu power output circuit output pulse signal, power output circuit is according to
Output of pulse signal DC pulse erasing current, it is electric when passing through the DC pulse demagnetization on the anti-magnetized coil being mounted on pipeline
Magnetic field, the demagnetization of complete twin conduit are generated when stream.
Compared with prior art, the advantageous effects for the technical solution that the embodiment of the present application is proposed include:
This application discloses a kind of direct current inverse-excitation type impulse type demagnetization power output circuit and degaussers, are applied to demagnetization and fill
In setting, comprising: power expands stream output circuit, transformer exciting circuit and rectification circuit, and the power expands stream output circuit, is used for
Pulse signal is handled, and uses symmetrical push-pull output mode output signal, so that DC power supply enters according to the output signal
The transformer exciting circuit；The transformer exciting circuit, for handling the DC power supply and exporting pulse current；It is described
Rectification circuit, for rectifying the output pulse current and exporting DC pulse erasing current, to make direct current inverse-excitation type pulse
The qualified DC pulse erasing current of type degaussing gear output, guarantees the reliable and stable work of direct current inverse-excitation type impulse type degaussing gear
Make, improves demagnetization efficiency.
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 shown in figure 3, a kind of direct current inverse-excitation type impulse type demagnetization power output circuit proposed by the embodiment of the present application,
3 implementation steps for offseting magnetoelectricity source power output par, c further illustrate with reference to the accompanying drawing.
The demagnetization power output par, c mainly expands stream output two parts by driver transformer and power and forms, and motivates
The main output pulse signal of transformer；Power, which expands to flow output par, c and be substantially carried out to recommend, expands stream output.
The power output part is connected using transformer excitation MOS power tube mode, and such mode can be to avoid a
In the case where other MOS power tube damage, secondary damage exciter tube.MOS power tube uses parallel operation, to increase output power.
After P1, P2 receive the pulse signal from driver unit, MOS power tube is given in the two groups of outputs of T6 fraction of transformer
Group provides signal and carries out push-pull output.Driver transformer T3, T4, T5 power output uses amorphous alloy transformer to improve system
Stability.
Voltage-stabiliser tube ZD1~ZD4, diode D23~D26 and resistance R49, R50, R51, R52 form the defeated of MOS power tube group
Enter to protect circuit, play quick cut-off, and protective effect.Capacitor C45~C48 and resistance R41, R42, R59, R60 composition point
Peak uptake pathway makes MOS power tube group work in safe condition.
Inverter power output circuit is formed by MOS power tube group Q5~Q6.The output of the circuit, through capacitor C14~C16 every
Straight driving 3 driver transformer T3, T4, T5 parallel connections decompression in parallel, after fast recovery rectifier diode half-bridge D27 rectification, output
DC current is the erasing current of 300A.
Compared with prior art, the advantageous effects for the technical solution that the embodiment of the present application is proposed include:
This application discloses a kind of direct current inverse-excitation type impulse type demagnetization power output circuit and degaussers, are applied to demagnetization and fill
In setting, comprising: power expands stream output circuit, transformer exciting circuit and rectification circuit, and the power expands stream output circuit, is used for
Pulse signal is handled, and uses symmetrical push-pull output mode output signal, so that DC power supply enters according to the output signal
The transformer exciting circuit；The transformer exciting circuit, for handling the DC power supply and exporting pulse current；It is described
Rectification circuit, for rectifying the output pulse current and exporting DC pulse erasing current, to make direct current inverse-excitation type pulse
The qualified DC pulse erasing current of type degaussing gear output, guarantees the reliable and stable work of direct current inverse-excitation type impulse type degaussing gear
Make, improves demagnetization efficiency.
To be illustrated more clearly that scheme that the application previous embodiment provides, below in conjunction with Fig. 3 to a kind of straight in the application
Positional relationship and operating principle are illustrated between stream each component of inverse-excitation type impulse type demagnetization power output circuit.
After P1, P2 receive the pulse signal from driver unit, the symmetrical push-pull output of T6 grade of transformer gives MOS power
Pipe group provides signal and carries out push-pull output.When signal positive half cycle, transformer T6 secondary coil L2, L4 symmetrical operation.Secondary coil
L2 connection 12V voltage-stabiliser tube ZD1, capacitor C are after resistance R, diode D series connection partial pressure through resistance R49, R43, R44, R45 to MOS
Power tube group Q5 provides gate voltage；Secondary coil L4 connection 12V voltage-stabiliser tube ZD4, capacitor C connect through resistance R, diode D and divide
Gate voltage is provided to MOS power tube group Q8 by R52, R56, R57, R58.Power supply 300V DC power supply capacitor C12, C13,
There is provided operating voltage after C43, C44 filtering, through MOS power tube group Q5, driver transformer T3, T4, T5 primary coil, by every
Straight capacitor C14~C16 parallel connection enters ground through MOS power tube group Q8 again.When signal negative half period, L5, L3 of transformer T6 secondary coil
Symmetrical operation.Secondary coil L5 connection 12V voltage-stabiliser tube ZD2, capacitor C through resistance R, diode D series connection partial pressure after through resistance R50,
R53, R54, R55 provide gate voltage to MOS power tube group Q6；Secondary coil L3 connection 12V voltage-stabiliser tube ZD3, capacitor C are through resistance
R, gate voltage is provided to MOS power tube group Q7 through resistance R51, R46, R47, R48 after diode D series connection partial pressure.Power supply 300V is straight
Galvanic electricity source is through MOS power tube group Q6, driver transformer T3, T4, T5 primary coil, again by capacitance C14~C16 parallel connection
Enter ground through MOS power tube group Q7, completes whole cycle.Driver transformer T3, T4, T5 grade are exported to fast recovery rectifier diode half
Bridge D27 rectification exports erasing pulse electric current after capacitor C36 carries out waveform shaping.R61, C35 series connection with driver transformer T3,
T4, T5 parallel connection of secondary windings absorb high frequency spikes, avoid high-frequency self-excitation, stablize output.Diode D23, D24, D25, D26, D
In power tube work, operating voltage of quickly releasing is conducive to quickly cut-off.Voltage-stabiliser tube ZD1, ZD2, ZD3, ZD4 lifting driving electricity
Pressure makes MOS power tube group Q5, Q6, Q7, Q8 work in switch state, avoids DC component.Capacitor C, resistance R, diode D filter
Except the low pressure component of transformer T6 secondary coil L2, L3, L4, L5, the work of firm power pipe.Driver transformer T3, T4, T5 are specific
The stability of system is improved for amorphous alloy transformer.
Capacitor C45, C46, C47, C48 and resistance R41, R42, R59, R60 form peak absorbing network, make the work of switching tube
Make in safe condition.
Inverter power output circuit is formed by MOS power tube group Q5~Q6.The output of the circuit through capacitor C14~C16 every
After straight driving 3 driver transformer T3, T4, T5 parallel connections decompression in parallel, rectified by fast recovery rectifier diode half-bridge D27, output
Pulse erasing current.Capacitor C36 filters out spike, keeps pulse smooth；Capacitor C31, C32 form midpoint no-voltage, and suspension connects
Ground.
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 (7)
1. a kind of direct current inverse-excitation type impulse type demagnetization power output circuit is applied in degaussing gear characterized by comprising
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 DC pulse erasing current.
2. direct current inverse-excitation type impulse type demagnetization power output circuit as described in claim 1, which is characterized in that
The power expands stream output circuit, further includes: transformer and MOS power tube group, wherein
Four secondary coils of the transformer be separately connected four groups described in MOS power tube group, between MOS power tube group described in four groups
It is connected in parallel；
The transformer exciting circuit, further includes: driver transformer；
The transformer, for providing gate voltage to the MOS power tube group according to the pulse signal；
The MOS power tube group, for the DC power supply to be supplied to the driver transformer；
The driver transformer, the DC power supply for inputting primary coil export the pulse current through secondary coil.
3. direct current inverse-excitation type impulse type demagnetization power output circuit as described in claim 1, which is characterized in that
Further include: the first protection circuit and the second protection circuit, wherein
The first protection circuit, further includes: voltage-stabiliser tube, diode and resistance, after resistance described in the diodes in parallel with institute
State voltage-stabiliser tube series connection, transformer secondary coil and MOS power tube group described in the first protection circuit connection；
The second protection circuit further includes capacitor and resistance, and the capacitor is connected with the resistance, the second protection circuit
Connect the MOS power tube group both ends；
The first protection circuit, for protecting the MOS power tube group by quickly cut-off；
The second protection circuit, for protecting the MOS power tube group by absorbing peak pulse.
4. direct current inverse-excitation type impulse type demagnetization power output circuit as described in claim 1, which is characterized in that further include: it is defeated
Enter filter circuit and output filter circuit, wherein
The input filter circuit, for being filtered to the DC power supply；
The output filter circuit, for filtering out the spike of the DC pulse erasing current.
5. direct current inverse-excitation type impulse type demagnetization power output circuit as claimed in claim 2, which is characterized in that the excitation becomes
Depressor is specially amorphous alloy transformer.
6. direct current inverse-excitation type impulse type demagnetization power output circuit as described in claim 1, which is characterized in that the rectified current
Road is specially fast recovery rectifier diode half-bridge circuit.
7. a kind of degausser, which is characterized in that including direct current inverse-excitation type impulse type demagnetization as claimed in any one of claims 1 to 6
Power output circuit, further includes: main control circuit, auxiliary power circuit and anti-magnetized coil, wherein
The main control circuit, for carrying out pulsewidth modulation, Xiang Suoshu direct current inverse-excitation type impulse type demagnetization power output circuit is defeated
Pulse signal out；
The auxiliary power circuit, for providing stable low-tension supply to the main control circuit；
The anti-magnetized coil, for being mounted on pipeline, when thereon by generating magnetic field, completion pair when DC pulse erasing current
The demagnetization of pipeline.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113346876A (en) * | 2021-06-11 | 2021-09-03 | 成都飞云科技有限公司 | Pulse generating device and pulse control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113346876A (en) * | 2021-06-11 | 2021-09-03 | 成都飞云科技有限公司 | Pulse generating device and pulse control method |
| CN113346876B (en) * | 2021-06-11 | 2022-07-05 | 成都飞云科技有限公司 | Pulse generating device and pulse control method |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191119 |