CN108335826A - Permanent-magnet ferrite is molded magnetization, demagnetization circuit and its operation method - Google Patents
Permanent-magnet ferrite is molded magnetization, demagnetization circuit and its operation method Download PDFInfo
- Publication number
- CN108335826A CN108335826A CN201810195005.2A CN201810195005A CN108335826A CN 108335826 A CN108335826 A CN 108335826A CN 201810195005 A CN201810195005 A CN 201810195005A CN 108335826 A CN108335826 A CN 108335826A
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- China
- Prior art keywords
- demagnetization
- current
- circuit
- silicon controlled
- controlled module
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/003—Methods and devices for magnetising permanent magnets
Abstract
The invention discloses a kind of moldings of permanent-magnet ferrite to fill, demagnetization circuit and its operation method, permanent-magnet ferrite molding is filled, demagnetization circuit includes transformer, magnetize silicon controlled module, demagnetize silicon controlled module, inductance coil, main circuit discharge loop, control circuit, it can realize and magnetize to inductance coil, the No-contact switch of demagnetization, and to magnetizing electric current and demagnetization current carries out closed loop PID control respectively, can be achieved to magnetize the adjustable constant current of electric current and demagnetization current, be conducive to provide stabilizing magnetic field intensity in the molding production process of permanent-magnet ferrite, to Improving The Quality of Products.The present invention also shortens energy release time of inductance coil during magnetizing, demagnetizing by the setting of main circuit discharge loop, to reduce the impact of energy release instant high-voltage, high current to each electric elements of main circuit, use reliability and the service life of electric elements are promoted, and then reduces the failure rate of permanent-magnet ferrite former.
Description
Technical field
The present invention relates to permanent-magnet ferrite former technical field, more particularly to the filling of permanent-magnet ferrite former,
Demagnetization circuit.
Background technology
During permanent-magnet ferrite formed product other than pressurizeing, drawing water, will also to the slurry of certain water content into
Row high-intensity magnetic field is orientated, and the inductance coil of generally use big inductance quantity generates high-intensity magnetic field, fills in the control of demagnetization in switching, conventional
Charge circuit switches magnetization, demagnetization sense of current by contactor.However, the unfavorable shadow of both sides will be brought using contactor
It rings：First, the electric arc that contactor generates when switching will be such that the convert resistance of contactor increases, this will make magnetization, demagnetization electric current not
Stablize, thereby result in that magnetic field is unstable, eventually influences the magnetic field orientating degree of product；Second, the service life of contactor is shorter,
It it is 3~5 months, the shorter service life of contactor will be such that the failure rate of permanent-magnet ferrite former increases.
In addition, charge and discharge, the release of inductance coil electric energy are carried out to the inductance coil of big inductance quantity during magnetization, demagnetization
The high voltage of moment, high current will bring impact to each electric elements of main circuit, this can influence making for main circuit electric elements
With reliability, shorten its service life, the failure rate of permanent-magnet ferrite former can also increased.
Invention content
In view of this, a kind of permanent-magnet ferrite molding magnetization, demagnetization circuit of present invention offer and its operation method, it can be real
The No-contact switch that now magnetize to inductance coil, demagnetizes, and the electric current that magnetizes, demagnetization current are realized by closed loop PID control
Adjustable constant current, additionally it is possible to which energy of inductance coil during magnetizing, demagnetizing is shortened by the setting of main circuit discharge loop
Release time promotes electric appliance to reduce the impact of energy release instant high-voltage, high current to each electric elements of main circuit
The use reliability of element and service life, and then reduce the failure rate of permanent-magnet ferrite former.
In order to solve the above technical problems, the technical scheme is that：
A kind of permanent-magnet ferrite molding magnetization, demagnetization circuit, including：
The primary side of transformer, the transformer is connect with power supply network, for providing three-phase alternating-current supply；
Magnetize silicon controlled module, and the first end of the silicon controlled module that magnetizes is connect with the secondary side of the transformer；
Demagnetize silicon controlled module, and the first end of the demagnetization silicon controlled module is connect with the secondary side of the transformer；
Inductance coil, second end and the demagnetization of the first end of the inductance coil with the silicon controlled module that magnetizes
The second end of silicon controlled module connects, and the second end of the inductance coil is connect with the secondary side of the transformer；
Control circuit, the control circuit are separately connected silicon controlled module and the silicon-controlled mould of demagnetization of magnetizing
Block；
The silicon controlled module that magnetizes described in the control circuit control provides the electricity that magnetizes for the silicon controlled module that magnetizes described in outflow
Stream, and the electric current stabilization that magnetizes described in control, the electric current that magnetizes is DC current；
The control circuit controls the demagnetization silicon controlled module and provides the demagnetization electricity for flowing into the demagnetization silicon controlled module
Stream, and control the demagnetization current and stablize, the demagnetization current is DC current；
Control circuit control provide described in magnetize electric current the course of work and the offer demagnetization current it is worked
Switching between journey.
As an improvement a kind of permanent-magnet ferrite molding magnetization, demagnetization circuit also includes main circuit discharge loop, institute
The first end for stating main circuit discharge loop is connect with the first end of the inductance coil, the second end of the main circuit discharge loop
It is connect with the second end of the inductance coil.By the setting of main circuit discharge loop, inductance coil can be shortened and magnetizing, moving back
Energy release time during magnetic, to reduce energy release instant high-voltage, high current to each electric elements of main circuit
Impact, promote use reliability and the service life of electric elements, and then reduce the failure rate of permanent-magnet ferrite former.
As a preferred embodiment, the main circuit discharge loop is in series by a diode and a resistance, described two
The anode of pole pipe is connect with the secondary side of the transformer, and the cathode of the diode is connect with the first end of the resistance, institute
The second end for stating resistance is connect with the first end of the inductance coil.
As a preferred embodiment, the main circuit discharge loop is in series by a diode and a resistance, the electricity
The first end of resistance is connect with the secondary side of the transformer, and the second end of the resistance is connect with the anode of the diode, institute
The cathode for stating diode is connect with the first end of the inductance coil.
As a preferred embodiment, magnetize electric current and the demagnetization current are DC current.
It is passed as a preferred embodiment, the control circuit includes three-phase controllable silicon phase-shifting trigger module, PLC controller and electric current
Sensor, wherein PLC controller receives magnetize electric current and the demagnetization current signal of current sensor acquisition, PLC controls
Device magnetize by controlling the three-phase controllable silicon phase-shifting trigger module, and then described in controlling silicon controlled module and the demagnetization it is controllable
Silicon module.
As a preferred embodiment, the transformer is three-phase isolation transformer, primary side connects for triangle, secondary side
For star-like connection.
Silicon controlled module is magnetized as a preferred embodiment, described and the demagnetization silicon controlled module is three-phase half-controlled circuit.
A kind of operation method of permanent-magnet ferrite molding magnetization, demagnetization circuit provided by the invention is：The control circuit is logical
Cross the control respectively to the magnetize silicon controlled module and the demagnetization silicon controlled module, and the electric current that magnetizes described in acquisition respectively
It is filled described in realization with the demagnetization current to carry out closed loop PID control to magnetize electric current and the demagnetization current respectively
The adjustable constant current of magnetoelectricity stream and the demagnetization current.
As a preferred embodiment, a kind of operation method of permanent-magnet ferrite molding magnetization, demagnetization circuit provided by the invention also wraps
It includes：Electric current and the demagnetization current are magnetized described in control circuit control by the inductance coil, to be permanent magnet oxygen
Body provides alignment magnetic field.
The present invention operation principle be：
Circuit of the present invention generates filling for positive and negative phase by main circuit and control circuit to the inductance coil of big inductance quantity
Magnetic, demagnetization current, to provide high intensity alignment magnetic field for permanent-magnet ferrite.In main circuit three-phase alternating current is provided by transformer
Source, magnetizing silicon controlled module and the silicon controlled module that demagnetizes can be electric to exporting magnetize electric current and demagnetization as the inductance coil of load
Stream.In control circuit output control signal function in magnetize silicon controlled module and and demagnetization silicon controlled module realize to the electricity that magnetizes
The control of stream and demagnetization current, control circuit can according to the needs of equipment operation to magnetize electric current and demagnetization current carry out control and
Handover operation, to realize that No-contact switch control exports magnetize electric current and demagnetization current.
Current sensor in control circuit to magnetizing electric current and demagnetization current is acquired, according to the current signal and
The control requirement of system generates control signal to realize the closed loop PID control to magnetize electric current and demagnetization current, with guarantee pair
Magnetize the adjustable constant current of electric current and demagnetization current.
Main circuit is also provided with main circuit discharge loop, and when transformer primary side powers off, the silicon controlled module that magnetizes stops production
After the raw electric current that magnetizes, the energy that gathers in inductance coil can by main circuit discharge loop and by transformer, magnetize it is silicon-controlled
The two channels of major loop that module, demagnetization silicon controlled module, inductance coil are constituted are discharged, and effectively shorten inductance in this way
Energy release time in coil reduces the impact of instant high-voltage, high current to each electric elements of main circuit, improves
The use reliability of electric elements, service life reduce equipment failure rate.
Compared with prior art, the beneficial effects of the invention are as follows：
1, permanent-magnet ferrite provided by the invention is molded magnetization, demagnetization circuit entirety without any contactor, it can be achieved that magnetizing, moving back
The No-contact switch of magnetic process, avoid magnetized in the prior art due to the use of contactor, the switching for process of demagnetizing is brought
Adverse effect (contactor generate electric arc influence magnetization, demagnetization electric current stabilization, contactor service life it is short so that setting event
Barrier rate improves), be conducive to provide stabilizing magnetic field intensity in the molding production process of permanent-magnet ferrite, make permanent-magnet ferrite product
Magnetic field orientating degree it is accurate, contribute to promoted permanent-magnet ferrite product quality, while also contribute to improve permanent-magnet ferrite production
The reliability of product production equipment.
2, permanent-magnet ferrite molding magnetization, demagnetization circuit provided by the invention increases absorption circuit in major loop, this will
Slow down the high voltage of electric energy release moment, high current when inductance coil carries out charge and discharge to rush to what each electric elements of main circuit were brought
It hits, helps to improve the service life of magnetization, demagnetization circuit, similarly help to the reliability for improving permanent-magnet ferrite Production equipment.
3, in the control method of permanent-magnet ferrite provided by the invention molding magnetization, demagnetization circuit, due to magnetize electric current and
Demagnetization current carry out closed loop PID control respectively, it can be achieved that magnetize electric current and demagnetization current adjustable constant current, be equally beneficial for forever
Stabilizing magnetic field intensity is provided in the molding production process of magnetic ferrites, to Improving The Quality of Products.
Description of the drawings
Fig. 1 is the structure chart of permanent-magnet ferrite molding magnetization, demagnetization circuit of the present invention.
Specific implementation mode
In order to make those skilled in the art more fully understand technical scheme of the present invention, With reference to embodiment
The present invention is described in further detail.
Circuit of the present invention is mainly made of main circuit and control circuit in Fig. 1.Main circuit includes：Three-phase isolation transformer 1,
Magnetize silicon-controlled module 2, the silicon-controlled module 3 of demagnetization, main circuit discharge loop 4 and inductance coil 5.Control circuit includes：Three-phase
Phase shift trigger for thyristor module 6, PLC controller 7, current sensor.
Circuit of the present invention generates filling for positive and negative phase by main circuit and control circuit to the inductance coil 5 of big inductance quantity
Magnetic, demagnetization current, to provide high intensity alignment magnetic field for permanent-magnet ferrite.It is provided by three-phase isolation transformer 1 in main circuit
The primary side of three-phase alternating-current supply, three-phase isolation transformer 1 connects power supply network, and the secondary side connection of three-phase isolation transformer 1 is filled
Magnetic silicon controlled module 2 exchanges end with demagnetization silicon controlled module 3.Magnetize silicon controlled module 2 and demagnetization silicon controlled module 3 be all made of
Three-phase half-controlled circuit, the electric current i that can magnetize to the output of inductance coil 5 as load fills and demagnetization current i is moved back.Inductance coil 5
One end is connect with the DC terminal of magnetize silicon controlled module 2 and the silicon controlled module 3 that demagnetizes, and the other end of inductance coil 5 is separated by with three
Neutral conductor connection from 1 secondary side of transformer.
The output control signal of PLC controller 7 in control circuit is acted on by three-phase controllable silicon phase-shifting trigger module 6 to be filled
Three-phase half-controlled circuit in magnetic silicon controlled module 2, to realize the control filled to the electric current i that magnetizes, the electric current i that magnetizes fills to be filled for outflow
The DC current of magnetic silicon controlled module 2.The output control signal of PLC controller 7 in control circuit passes through three-phase controllable silicon phase shift
The three-phase half-controlled circuit that trigger module 6 acts in demagnetization silicon controlled module 3 moves back to realize the control moved back to demagnetization current i
Magnetoelectricity stream i moves back to flow into the DC current of demagnetization silicon controlled module 3.PLC controller 7 in control circuit can be according to equipment operation
Needs the electric current i that magnetizes is filled and demagnetization current i setback rows control and handover operation, to realize No-contact switch control output
The electric current i that magnetizes is filled to move back with demagnetization current i.
Current sensor in control circuit is filled to the electric current i that magnetizes and demagnetization current i is moved back and is acquired, and will be collected
Current signal is transmitted to PLC controller 7, and PLC controller 7 is generated according to the control requirement of the current signal and system received
Signal is controlled, the control signal is by three-phase controllable silicon phase-shifting trigger module 6 to silicon controlled module 2 and the silicon-controlled mould that demagnetizes of magnetizing
Three-phase half-controlled circuit in block 3 is controlled, to realize to the closed loop PID control that electric current i fills and demagnetization current i is moved back that magnetizes,
To ensure to the adjustable constant current that electric current i fills and demagnetization current i is moved back that magnetizes.
Also and main circuit discharge loop 3 is connected at the both ends of inductance coil 5, main circuit discharge loop 3 is by diode D and electricity
Resistance R is composed in series, and the anode of diode D is connected to the neutral conductor and 5 one end of inductance coil of 1 secondary side of three-phase isolation transformer
On tie point, the cathode of diode D is connect with the first end of resistance R, the second end of resistance R connection inductance coil 5 and magnetize can
Control the tie point of silicon module 2 and the DC terminal of demagnetization silicon controlled module 3.
When three-phase isolation transformer primary side powers off, the silicon controlled module 2 that magnetizes, which stops generating, to magnetize after electric current i fills, inductance
The energy gathered in coil 5 can by main circuit discharge loop 3 and by three-phase isolation transformer 1, the silicon-controlled module 2 that magnetizes,
The two channels of major loop that demagnetization silicon controlled module 3, inductance coil 5 are constituted are discharged, and effectively shorten inductor wire in this way
Energy release time in circle 5, the impact of instant high-voltage, high current to each electric elements of main circuit is reduced, is improved
The use reliability of electric elements, service life reduce equipment failure rate.
It the above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
The limitation of the present invention, protection scope of the present invention should be subject to claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change
Protection scope of the present invention is also should be regarded as into retouching.
Claims (10)
1. a kind of permanent-magnet ferrite is molded magnetization, demagnetization circuit, including：
The primary side of transformer, the transformer is connect with power supply network, for providing three-phase alternating-current supply；
Magnetize silicon controlled module, and the first end of the silicon controlled module that magnetizes is connect with the secondary side of the transformer；
Demagnetize silicon controlled module, and the first end of the demagnetization silicon controlled module is connect with the secondary side of the transformer；
Inductance coil, the first end of the inductance coil and the second end of the silicon controlled module that magnetizes and the demagnetization are controllable
The second end of silicon module connects, and the second end of the inductance coil is connect with the secondary side of the transformer；
Control circuit is separately connected magnetize silicon controlled module and the demagnetization silicon controlled module；
The silicon controlled module that magnetizes described in the control circuit control provides the electric current that magnetizes for the silicon controlled module that magnetizes described in outflow, and
The electric current that magnetizes described in control is stablized；
The control circuit controls the demagnetization silicon controlled module and provides the demagnetization current for flowing into the demagnetization silicon controlled module, and
The demagnetization current is controlled to stablize；
Control circuit control provide described in magnetize electric current the course of work with provide the demagnetization current the course of work it
Between switching.
2. circuit as described in claim 1, it is characterised in that：The circuit also includes main circuit discharge loop, the main electricity
The first end of road discharge loop is connect with the first end of the inductance coil, the second end of the main circuit discharge loop with it is described
The second end of inductance coil connects.
3. circuit as claimed in claim 2, it is characterised in that：The main circuit discharge loop is by a diode and an electricity
Hinder in series, the anode of the diode is connect with the secondary side of the transformer, the cathode of the diode and the electricity
The first end of resistance connects, and the second end of the resistance is connect with the first end of the inductance coil.
4. circuit as claimed in claim 2, it is characterised in that：The main circuit discharge loop is by a diode and an electricity
Hinder in series, the first end of the resistance is connect with the secondary side of the transformer, the second end of the resistance and described two
The anode of pole pipe connects, and the cathode of the diode is connect with the first end of the inductance coil.
5. circuit as described in claim 1, it is characterised in that：Magnetize electric current and the demagnetization current are DC current.
6. the circuit as described in any one of claim 1-5, it is characterised in that：The control circuit includes three-phase controllable silicon
Phase-shifting trigger module, PLC controller and current sensor, wherein PLC controller receives the described of current sensor acquisition and magnetizes
Electric current and the demagnetization current signal, PLC controller control institute by controlling the three-phase controllable silicon phase-shifting trigger module
State magnetize silicon controlled module and the demagnetization silicon controlled module.
7. the circuit as described in any one of claim 1-6, it is characterised in that：The transformer isolates transformation for three
Device, primary side connect for triangle, and secondary side is star-like connection.
8. the circuit as described in any one of claim 1-5, it is characterised in that：Described magnetize and described is moved back at silicon controlled module
Magnetic silicon controlled module is three-phase half-controlled circuit.
9. the method for running the circuit as described in claim 1-8, it is characterised in that：The control circuit passes through respectively to institute
State the control of magnetize silicon controlled module and the demagnetization silicon controlled module, and magnetize described in acquisition respectively electric current and the demagnetization
Electric current, thus respectively to magnetize electric current and the demagnetization current progress closed loop PID control, magnetize described in realization electric current and institute
State the adjustable constant current of demagnetization current.
10. method as claimed in claim 8, it is characterised in that：It magnetizes and electric current and described moves back described in control circuit control
Magnetoelectricity stream is by the inductance coil, to provide alignment magnetic field for permanent-magnet ferrite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810195005.2A CN108335826A (en) | 2018-03-09 | 2018-03-09 | Permanent-magnet ferrite is molded magnetization, demagnetization circuit and its operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810195005.2A CN108335826A (en) | 2018-03-09 | 2018-03-09 | Permanent-magnet ferrite is molded magnetization, demagnetization circuit and its operation method |
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| Publication Number | Publication Date |
|---|---|
| CN108335826A true CN108335826A (en) | 2018-07-27 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810195005.2A Pending CN108335826A (en) | 2018-03-09 | 2018-03-09 | Permanent-magnet ferrite is molded magnetization, demagnetization circuit and its operation method |
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| CN (1) | CN108335826A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116978659A (en) * | 2023-06-13 | 2023-10-31 | 湖南二零八先进科技有限公司 | Quartz flexible accelerometer torquer magnetizing and demagnetizing device and application method |
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| CN204029518U (en) * | 2014-06-18 | 2014-12-17 | 西安鸣士机电开发有限公司 | Multi-path electricity permanent magnet cupula magnetizing and demagnetizing controller |
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| CN2491950Y (en) * | 2001-07-03 | 2002-05-15 | 瓦房店轴承集团有限责任公司 | Electromagnetic coreless card demagnetizer of bearing processing grinder |
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| CN116978659A (en) * | 2023-06-13 | 2023-10-31 | 湖南二零八先进科技有限公司 | Quartz flexible accelerometer torquer magnetizing and demagnetizing device and application method |
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Application publication date: 20180727 |