CN114709068A - Device and method for improving magnetic performance of manganese-zinc ferrite through coupling of microwave field, electric field and magnetic field - Google Patents
Device and method for improving magnetic performance of manganese-zinc ferrite through coupling of microwave field, electric field and magnetic field Download PDFInfo
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Abstract
The invention provides a device and a method for improving the magnetic property of manganese-zinc ferrite through coupling of a microwave field, an electric field and a magnetic field. The method comprises clamping the magnetic core to be processed between the fixed electrode chuck and the movable electrode chuck, so that the path to be processed of the magnetic core is collinear with the axis of the excitation coil; and respectively setting processing parameters of a microwave field, a pulse electric field and/or a pulse magnetic field according to the type of the manganese-zinc ferrite magnetic core, and performing one-field, two-field or three-field coupling processing on the magnetic core to be processed. Solves the problem that the prior art has no way of comprehensively improving the magnetic performance of the manganese-zinc ferrite in a simple and convenient operation and environment-friendly controllable way.
Description
Technical Field
The invention relates to the technical field of improvement of magnetic properties of manganese-zinc ferrite, in particular to a device and a method for improving the magnetic properties of manganese-zinc ferrite through coupling of a microwave field, an electric field and a magnetic field.
Background
Along with the popularization of mobile terminals such as smart phones and tablet computers, the demand of mobile terminal charging equipment is increasing, and the performance requirement is more and more stringent, and the mobile terminal charging equipment belongs to a high-frequency transformer, and can generate high-frequency interference during operation, and the ferrite and other magnetic cores are required to absorb and restrain the self-generated high-frequency interference, so the magnetic performance requirement of the ferrite and other magnetic cores in the industry is also more and more stringent.
In contrast, the mn-zn ferrite has the advantages of high frequency, low loss, and high magnetic permeability among many ferrite cores, and has become an important material for manufacturing core parts. The magnetic performance parameters of the manganese-zinc ferrite magnetic core include coercive force Hc (A/m), magnetic conductivity mu and volume power loss Pcv (kW/m)3) Mass power loss Pcm (W/kg), etc., the manganese-zinc ferrite is required to have higher magnetic permeability and lower power loss in the magnetic performance requirements of the manganese-zinc ferrite for mobile terminal charging equipment. In the prior art, the magnetic performance of the manganese-zinc ferrite is usually changed by changing the formula of the manganese-zinc ferrite and changing the process, but the practice shows that the magnetic performance of the manganese-zinc ferrite is difficult to improve in such a way, the process is difficult to control, and the method has little effect on effectively reducing the power loss of the manganese-zinc ferrite, so that the complexity of the process is greatly increased, the cost is increased, and the process controllability is reduced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a device and a method for improving the magnetic property of manganese-zinc ferrite through microwave field electric field magnetic field coupling, and solves the problem that the prior art has no way of comprehensively improving the magnetic property of manganese-zinc ferrite in an environment-friendly controllable way, and is simple and convenient to operate.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
the utility model provides a device that microwave field electric field magnetic field coupling promoted manganese zinc ferrite magnetic property, it includes the working chamber that surrounds by the isolation frame, microwave generator is installed to the one end of isolation frame, coaxial winding has the excitation coil on the lateral surface of isolation frame, the excitation coil is connected with magnetic field circuit, follows the axis both ends of isolation frame are provided with fixed electrode chuck and movable electrode chuck respectively, fixed electrode chuck with movable electrode chuck and electric field circuit connection.
Furthermore, the device for improving the magnetic property of the manganese-zinc ferrite through the coupling of the electric field and the magnetic field of the microwave field further comprises a shell, wherein the shell is sleeved on the excitation coil, one end of the shell, facing the microwave generator, is open, and a dynamic sealing piece matched with the end face of the microwave generator is arranged on the end face of the shell.
Further, the shell is fixed on the workbench, a guide rail is further arranged on the workbench, the bottom end of the microwave generator is installed on the sliding block, and the sliding block is connected to the guide rail in a sliding mode.
Further, the isolation frame is an alloy material frame with low resistivity and low magnetic permeability.
Furthermore, the isolation frame comprises an isolation end plate and an isolation cylinder, one end of the isolation cylinder is fixed on the isolation end plate, one end, far away from the isolation end plate, of the isolation cylinder is in sliding sleeve joint with the emission end of the microwave generator, and reflection inclined planes are arranged on the inner wall surfaces of the isolation end plate and the isolation cylinder.
Furthermore, a temperature sensor is installed on the shell, a probe of the temperature sensor is introduced into the working cavity, the temperature sensor is electrically connected to the input end of the controller, and the output end of the controller is electrically connected with the control switch X of the microwave generator.
Furthermore, the clamping end of the movable electrode chuck is provided with a pre-clamping mechanism capable of clamping and fixing the magnetic core, and the pre-clamping mechanism retreats to completely separate from the magnetic core when the end part of the magnetic core is contacted with the fixed electrode chuck.
A method for improving the magnetic performance of manganese-zinc ferrite through microwave field electric field magnetic field coupling comprises the following steps:
s1, closing the main power supply, clamping the magnetic core to be processed between the fixed electrode chuck and the movable electrode chuck, and placing the magnetic core to be processed in the working cavity, so that the path of the magnetic core to be processed is collinear on the axis of the magnet exciting coil;
s2, respectively setting the processing parameters of the microwave field, the pulse electric field and/or the pulse magnetic field according to the type of the manganese-zinc ferrite magnetic core,
the processing parameters of the pulsed electric field include: frequency of single electrical pulse
Single group of pulse number
Number of groups of pulses
(ii) a And/or
The processing parameters of the pulsed magnetic field include: pulsed magnetic field strength
Time of action of a single magnetic pulse
Total number of magnetic pulses
(ii) a And/or
The processing parameters of the microwave field include: setting an upper limit temperature value and a lower limit temperature value detected by a temperature sensor;
s3, according to the processing parameters of each field, opening the microwave field, the pulse electric field and/or the pulse magnetic field, and performing one-field, two-field or three-field coupling processing on the magnetic core to be processed;
and S4, measuring the volume power loss value of the processed magnetic core, judging whether the volume power loss value reaches a preset value, and if not, repeating the steps S1-S3.
The microwave field, the pulse electric field and the pulse magnetic field coupling method in the step S3 specifically includes: opening the microwave field to perform microwave radiation heat treatment on the magnetic core, and starting pulse after the temperature sensor detects that the surface temperature of the magnetic core reaches an upper limit temperature valueThe magnetic field magnetically treats the magnetic core at
And starting a pulse electric field to electrically process the magnetic core after time.
The invention has the beneficial effects that:
1. the microwave generator in the device, excitation coil and electrode chuck can provide the microwave field respectively, magnetic field and electric field, through setting up the working chamber in keeping apart the frame, fixed electrode chuck and movable electrode chuck mutually support can be to the quick centre gripping of not equidimension magnetic core and can control and add the holding power, prevent excessively to extrude the magnetic core, keep apart the frame and be low resistivity low magnetic permeability alloy material frame, keep apart the frame and can tie the microwave in keeping apart the frame, can prevent the influence of microwave field to the produced magnetic field of excitation coil, keep apart the frame again and can not produce the shielding to the low frequency magnetic field simultaneously, the electrode chuck is located the axis of excitation coil, microwave generator is located the one end of excitation coil, make the microwave field, electric field and magnetic field can not be influenced each other, improve its coupling effect, thereby promote the magnetic property of manganese zinc ferrite magnetic core.
2. The method of the invention sets different processing parameters of a microwave field, an electric field and a magnetic field according to the type of the manganese-zinc ferrite magnetic core, can reduce the residual stress and the curing shrinkage in the magnetic core by uniformly heating from inside to outside through the thermal effect of the microwave field, can ensure that polar group molecules of the manganese-zinc ferrite transition from a ground state to an excited state, generate deformation and vibration through the non-thermal effect of the microwave field, change the microstructure and improve the magnetic performance of the manganese-zinc ferrite magnetic core; meanwhile, the electric field and the magnetic field can input energy to excite atom motion in the magnetic core, twist a grain boundary, promote release and expansion of dislocation entanglement, cause increase of dislocation density, reduce obstruction of dislocation motion, further reduce dislocation nucleation energy, accelerate dislocation motion, promote internal stress release, exert different magnetic field intensity effects to influence the orientation density of the crystal texture, and further comprehensively improve the magnetic performance of the material.
Drawings
FIG. 1 is a cross-sectional view of the structure of a device for improving the magnetic performance of manganese-zinc ferrite by coupling of an electric field and a magnetic field of a microwave field.
Fig. 2 is a schematic structural diagram of the pre-clamping mechanism in fig. 1.
Fig. 3 is an enlarged view a of fig. 2.
Fig. 4 is a perspective view of the expansion sleeve of fig. 2.
FIG. 5 is a circuit diagram of a device for improving the magnetic performance of manganese-zinc ferrite by coupling the electric field and the magnetic field of a microwave field.
Wherein, 1, a shell; 2. a field coil; 3. a microwave generator; 31. a slider; 32. a microwave transmitting end; 33. a temperature sensor; 4. an isolation frame; 41. an isolation end plate; 42. an isolation cylinder; 43. a reflective bevel; 5. a movable electrode chuck; 51. a cylinder; 511. a piston rod; 52. fixing the electrode chuck; 53. a conductive top block; 6. a working chamber; 7. a pre-clamping mechanism; 71. expanding the sleeve; 711. axially grooving; 72. a spring; 73. fixing a column; 74. a connecting rod; 741. an outer conical surface; 75. a limiting mechanism; 751. elastic nails; 752. a limiting groove; 753. an air bag; 754. a valve core; 755. a push rod; 756. a resilient member; 8. a work table; 81. a guide rail; 9. a magnetic core.
Detailed Description
The embodiment of the invention provides a device and a method for improving the magnetic performance of manganese-zinc ferrite through microwave field electric field magnetic field coupling, and solves the problem that the prior art has no way of comprehensively improving the magnetic performance of manganese-zinc ferrite in a simple and convenient operation and environment-friendly controllable way.
For better understanding of the above technical solutions, the following detailed descriptions will be provided in conjunction with the drawings and the detailed description of the embodiments.
Example 1
As shown in fig. 1 to 4, the device for improving the magnetic property of manganese-zinc ferrite through microwave field electric field magnetic field coupling comprises a working cavity 6 surrounded by an isolation frame 4, a microwave generator 3 is installed at one end of the isolation frame 4, an excitation coil 2 is coaxially wound on the outer side surface of the isolation frame 4, the excitation coil 2 is connected with a magnetic field circuit, a fixed electrode chuck 52 and a movable electrode chuck 5 are respectively arranged at two ends of the axis of the isolation frame 4, and the fixed electrode chuck 52 and the movable electrode chuck 5 are connected with the electric field circuit.
The excitation coil 2 is externally sleeved with a shell 1, one end of the shell 1 facing the microwave generator 3 is open, and a dynamic sealing piece matched with the end face of the microwave generator 3 is arranged on the end face of the shell 1. A locking piece is required to be connected between the microwave generator 3 and the shell 1, and when the microwave generator 3 works, the locking piece is used for preventing microwave leakage caused by accidentally pulling out the microwave generator. The material of casing 1 is electrically conductive alloy, can protect magnetic core 9 in the working chamber 6 not receive external interference, can shield the microwave simultaneously and reduce the loss of microwave energy and prevent that the microwave from leaking the polluted environment.
The movable electrode chuck 5 comprises a cylinder 51, and a conductive top block 53 is fixed at the end part of a piston rod 511 of the cylinder 51; the fixed electrode cartridge 52 is disposed opposite to the movable electrode cartridge 5, and the fixed electrode cartridge 52 includes a fixed rod and a conductive top block 53 fixed to an end of the fixed rod, and the fixed rod is hermetically penetrated through the housing 1 and the separation frame 4. The conductive top block 53 is preferably made of brass (copper-zinc alloy), which is not a magnetic conductive material, so that the magnetic force cannot be effectively concentrated, and therefore, the microwave acts on the conductive top block without generating eddy current inside the conductive top block, thereby not affecting the excitation of the electric field.
Casing 1 is fixed in on the workstation 8, is provided with guide rail 81 on the workstation 8, and the bottom of microwave generator 3 is installed on slider 31, and slider 31 sliding connection is on guide rail 81. In this embodiment, the cylinder 51 is installed on the outer end surface of the microwave generator 3, and the piston rod of the cylinder 51 passes through the microwave generator 3 and then enters the working cavity 6, so that the microwave generator 3 can slide along the guide rail 81, and the magnetic core is clamped between the two electrodes.
The isolation frame 4 is an alloy material frame with low resistivity and low magnetic permeability, the low resistivity means that the resistivity is not more than 0.071 omega mm2/m, and the low magnetic permeability means that the magnetic permeability is not more than 4 pi-KHz 10^ -7H/m. In the scheme, because the magnetic field generated by the excitation coil 2 is a low-frequency magnetic field, the metal material with low magnetic permeability can not generate a shielding effect on the low-frequency magnetic field, so that the excitation coil outside the isolation frame 4 can work. Meanwhile, because the complex dielectric constant of the alloy material frame with low resistivity and low magnetic permeability is extremely large, the contact position between the alloy material frame and the air surface is greatly mismatched (microwave can be absorbed by matching), and the microwave can be totally reflected.
The isolation frame 4 comprises an isolation end plate 41 fixed on the inner wall of the casing 1 and an isolation cylinder 42 with one end fixed on the isolation end plate 41, the end of the isolation cylinder 42 far away from the isolation end plate 41 is slidably sleeved on the emission end 32 of the microwave generator, and the inner wall surfaces of the isolation end plate 41 and the isolation cylinder 42 are both provided with a reflection inclined surface 43. The microwave emitted from the microwave emitting end 32 is emitted to the emitting inclined plane 43 on the inner wall of the isolation end plate 41 along the axial direction, reflected to the emitting inclined plane 43 on the inner wall of the isolation cylinder 42, and reflected to emit the microwave to the magnetic core 9 (as shown by the dotted arrow in fig. 1), wherein the angle of the emitting inclined plane is set according to the actual position of the magnetic core 9. The arrangement of the emission ramp 43 makes it possible to redirect the microwaves emitted by the microwave generator 3 so that they ultimately act on the magnetic core 9 as much as possible.
The shell 1 is provided with a temperature sensor 33, the temperature sensor 33 can be an optical fiber temperature sensor or an infrared temperature sensor, and the surface temperature of the magnetic core 9 is detected by the temperature sensor 33 in real time and fed back in real time. The probe of the temperature sensor 33 is connected into the working cavity 6, the temperature sensor 33 is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the control switch X of the microwave generator.
The clamping end of the movable electrode chuck 5 is provided with a pre-clamping mechanism 7 capable of clamping and fixing the magnetic core, when the end part of the magnetic core 9 contacts the fixed electrode chuck 52, the pre-clamping mechanism 7 is triggered by the extrusion force of the fixed electrode chuck 52 to the magnetic core 9, the pre-clamping mechanism 7 is retreated to be completely separated from the magnetic core 9, and the magnetic core 9 can be completely exposed in the working cavity and subjected to coupling treatment of a microwave field, an electric field and a magnetic field.
In this embodiment, it is preferable that a connecting rod 74 is fixed between the piston rod 511 and the conductive top block 53 of the movable electrode chuck 5, an outer tapered surface 741 is provided at an end of the connecting rod 74 connected to the conductive top block 53, and the end of the conductive top block 53 is a small diameter end of the outer tapered surface 741.
The pre-clamping mechanism 7 comprises an expansion sleeve 71, the expansion sleeve 71 comprises a circular tube-shaped sleeve body, one end of the sleeve body is provided with a plurality of axial cutting grooves 711 along the circumference, one end of each axial cutting groove 711 penetrates through the end face of the sleeve body, and the arrangement of the axial cutting grooves 711 enables the expansion sleeve 71 to clamp and fix magnetic cores 9 of different sizes. One end of the expansion sleeve 71 provided with the axial cutting groove 711 is used for clamping the magnetic core 9, and the other end of the expansion sleeve 71 is sleeved on one end of the connecting rod 74 provided with the outer conical surface 741 and is in clearance fit with the large-diameter end of the outer conical surface 741. A fixing column 73 extending outwards in the radial direction is fixed on the outer wall surface of one end, away from the outer conical surface 741, of the connecting rod 74, the fixing column 73 is fixedly connected to one end of the spring 72, and the other end of the spring 72 is fixedly connected to the end surface of the expansion sleeve 71.
The middle part of the connecting rod 74 is provided with a limiting mechanism 75, the limiting mechanism 75 comprises an elastic nail 751 radially arranged along the connecting rod 74, the elastic nail 751 is inserted in a limiting groove 752, the bottom of the limiting groove 752 is provided with an air bag 753, the bottom end of the elastic nail 751 is fixed on the air bag 753, the air bag 753 is connected with a valve core 754, the outer end of a core body of the valve core 754 is fixedly connected with a push rod 755, one end of the push rod 755 far away from the valve core 754 sequentially penetrates through the connecting rod 74 and a conductive top block 53 of the movable electrode chuck 5 and protrudes out of the end face of the conductive top block 53, after the magnetic core 9 is abutted against the fixed electrode chuck 52, a piston rod of the air cylinder 51 continues to extend, the magnetic core 9 is pushed to move towards one end of the movable electrode chuck 5, the magnetic core 9 can press the push rod 755 back to move towards one end of the air bag 753, so as to open the valve core 754, deflate the air bag 753, and the elastic nail 751 retracts into the limiting groove 752, let the cover 71 that expands can be under the rebound effect of spring 72, the one end that the cover 71 that expands is far away from magnetic core 9 to remove magnetic core 9, let magnetic core 9 do not have the sheltering from outward, with the effect of guaranteeing electric field, magnetic field and microwave field. When the core 9 is no longer in abutment against the push rod 755, the push rod 755 returns to the original position by the resilient member 756 to close the valve core 754, so that the airbag 753 can be inflated by the next inflation device. The resilient member 756 may be a compression spring having one end secured to the connecting rod 74 and the other end secured to the side wall of the push rod 755.
The valve core 754 has the same structure as a valve core used in basketball and tires, and a core body to which the push rod 755 is connected is a mechanism capable of changing the open or sealed state by moving in the axial direction. An electric or manual inflating device (not shown in the figure) is connected to the air bag 753 through an air pipe, the air bag 753 can be inflated or deflated controllably through the inflating device, the volume of the air bag 753 is changed, so that whether the elastic nails 751 extend out of the limiting grooves 752 or retract into the limiting grooves 752 is determined, the extending out of the limiting grooves 752 can prevent the expansion sleeve 71 from retracting under the action of elastic force, and therefore enough space is reserved in the expansion sleeve 71 to clamp the magnetic core.
An inner conical surface matched with the conical surface of the outer conical surface 741 is machined on the inner wall of the expansion sleeve 71, after the expansion sleeve 71 loses the blocking effect of the limiting mechanism 75, along with the elastic force of the spring 72, the inner conical surface moves towards the large-diameter end of the outer conical surface 741 in the retraction direction, so that the outer conical surface 741 can expand the expansion sleeve 71, the expansion sleeve 71 can be more smoothly separated from the magnetic core, and meanwhile the expansion sleeve 71 can be prevented from scratching the magnetic core 9.
As shown in fig. 5, the digital control pulse electromagnetic microwave coupling processor is externally connected to a power frequency alternating current
(220V, 50 Hz), and the pulse current after treatment is applied to the capacitor
Performing charge and discharge operations, and a capacitor
The guide rod is discharged along the wire after charging. Through the above processing, the high-voltage power-frequency alternating current is converted into a low-voltage pulse voltage meeting the processing setting requirements, and the two electrodes of the voltage are the movable electrode chuck 5 and the fixed electrode chuck 52. A low-voltage pulse electric field is formed between the two end faces of the conversion electrode clamp head, which are in contact with the two ends of the magnetic core, and the manganese-zinc ferrite magnetic core is electrically treated by the low-voltage pulse electric field.
Numerical control pulse electromagnetic microwave coupling processor externally connected with power frequency alternating current
(220V, 50 Hz) and converting the power frequency alternating current into the corresponding parameter settingCurrent of a certain frequency to internal capacitance
Charging is carried out, after charging
The capacitor discharges the excitation coil 2 with high energy to generate a high-intensity pulse magnetic field, and the manganese-zinc ferrite core is magnetically treated by the high-intensity pulse magnetic field.
The numerical control pulse electromagnetic microwave coupling processor connects power frequency alternating current (220V, 50 Hz) into the microwave generator 3, and the connected power frequency alternating current is transmitted to the voltage required by the microwave generator 3 to generate a required constant frequency or waveform signal, so as to generate a microwave field to carry out microwave radiation treatment and heat treatment on the manganese-zinc ferrite magnetic core. In the process, the temperature of the manganese-zinc-ferrite core is gradually increased from the room temperature, when the temperature of the manganese-zinc-ferrite core is increased to the set upper limit temperature of the temperature sensor 33, the temperature sensor sends a pulse command to the control switch X, so that the control switch X is turned off, the microwave generator 3 does not emit microwaves any more, the manganese-zinc-ferrite magnetic core is gradually cooled in the air, the temperature is detected and fed back by the temperature sensor 33 after the temperature is reduced to the set lower limit temperature, the control switch X is closed, a microwave generation part circuit of the microwave generation and temperature control circuit forms a closed loop, a microwave generator transmits microwaves to the inside of the working cavity 6 to continuously carry out microwave radiation treatment and heat treatment on the manganese-zinc-ferrite magnetic core, the temperature of the manganese-zinc-ferrite magnetic core is gradually increased to the designated upper limit temperature and then sends a pulse instruction to the control switch X, so that the control switch X is switched off, and the microwave radiation treatment and the heat treatment of the manganese-zinc ferrite are realized in a circulating way.
The basic structure of the microwave generator consists of a magnet and a tube core, and an axial constant magnetic field required by the microwave generator during working is generated by the magnet; the tube core is composed of three parts of an anode, a cathode and a filament, wherein the filament is used as a heat source to heat the cathode, and the surface of the cathode can rapidly emit enough electrons after the cathode is heated so as to maintain the current when the microwave generator normally works. Electrons are subjected to Loran magnetic force in a magnetic field, and a calculation formula is calculated according to the Loran magnetic force
Wherein Q is the electron electric quantity, V is the electron velocity, B is the magnetic induction intensity,
the angle between the electron velocity and the direction of the magnetic induction intensity is shown, so that the lorentn magnetic force is zero when the angle between the electron velocity and the direction of the magnetic induction intensity is equal to 0 degrees or 180 degrees, and the influence of the magnetic field excited by the excitation coil on the part is basically zero.
For the circuits inside the microwave generator, ampere forces are experienced in the magnetic field
Wherein B is the magnetic induction intensity,
the included angle between the current direction and the magnetic induction intensity direction is I is the current magnitude, so the included angle between the current direction and the magnetic induction intensity direction
The ampere force is zero when the angle is equal to 0 degree or 180 degrees, so that the mutual influence of the microwave field and the magnetic field can be avoided only by making the current direction (the direction of the electric wire) and the magnetic field direction parallel to the greatest extent in the wire arrangement process of the microwave generator.
When the microwave oven works, more than 2000V of high-voltage direct current is added to the anode of the tube core, and the 2000V of high-voltage direct current is obtained by converting power frequency alternating current through a transformer in a microwave generator. During operation, the anode is grounded, the cathode is connected with negative high voltage, a radial direct current electric field is generated between the anode and the cathode, the cathode emits electrons, and the anode receives the electrons to form stable current during operation. The electrons continuously transfer energy obtained from the direct current electric field to the high frequency electric field. The high-frequency electric field leads the energy to the waveguide tube through the transmitting antenna of the microwave generator, and the waveguide tube leads the microwave transmitted by the microwave generator into the working cavity.
Example 2
The method for improving the magnetic performance of the manganese-zinc ferrite through the coupling of the electric field and the magnetic field of the microwave field comprises the following steps:
s1, closing the main power supply, clamping the magnetic core 9 to be processed between the fixed electrode chuck and the movable electrode chuck, and placing the magnetic core in the working cavity to make the path of the magnetic core to be processed collinear on the axis of the magnet exciting coil;
s2, respectively setting the processing parameters of the microwave field, the pulse electric field and/or the pulse magnetic field according to the type of the manganese-zinc ferrite magnetic core,
the processing parameters of the pulsed electric field include: frequency of single electrical pulse
Single group of pulse number
Number of sets of pulses
(ii) a And/or
The processing parameters of the pulsed magnetic field include: pulsed magnetic field strength
Time of action of a single magnetic pulse
Total number of magnetic pulses
(ii) a And/or
The processing parameters of the microwave field include: setting an upper limit temperature value and a lower limit temperature value detected by a temperature sensor;
s3, according to the processing parameters of each field, simultaneously opening a microwave field, a pulse electric field and/or a pulse magnetic field, and performing one-field, two-field or three-field coupling processing on the magnetic core to be processed;
the microwave field, the pulse electric field and the pulse magnetic field are specifically coupled as follows:
opening the microwave field to perform microwave radiation heat treatment on the magnetic core, starting the pulse magnetic field to perform magnetic treatment on the magnetic core after the temperature sensor detects that the surface temperature of the magnetic core reaches an upper limit temperature value
After the time, the pulse magnetic field starts the pulse electric field in the effective period of the magnetic release to electrically process the magnetic core, so as to improve the electromagnetic coupling effect, and the circuit schematic diagram shown in fig. 5 is specifically as follows:
closing the switch S5, closing the microwave generation and temperature control circuit, and starting to perform microwave radiation and heat treatment on the manganese-zinc ferrite part; and closing the switches S1 and S2 to close the pulse electric field circuit, wherein two contact end faces of the movable ejector rod, the fixed ejector rod and the part are provided with positive and negative charges, the two contact end faces form a pulse electric field bipolar plate, and the space between the two contact end faces excites a pulse electric field which electrically processes the manganese-zinc ferrite part. And closing the switches S3 and S4 to close the pulse magnetic field circuit, exciting the pulse magnetic field in the space by the exciting coil, and magnetically treating the manganese-zinc ferrite part by the pulse magnetic field. In the treatment process, the electric field, the magnetic field and the microwave field exist at the same time and are mutually coupled.
The specific coupling process is as follows: through the programmable logic control system PLC in the circuit, the microwave generator emits microwaves to perform microwave radiation treatment and heat treatment on the manganese-zinc ferrite part, the programmable logic control system PLC controls the pulse magnetic field to perform magnetic treatment on the magnetic core after the temperature of the manganese-zinc ferrite part to be treated reaches the upper limit temperature for the first time, and the programmable logic control system PLC controls the pulse magnetic field to perform magnetic treatment on the magnetic core after the temperature of the manganese-zinc ferrite part to be treated reaches the upper limit temperature
And starting a pulse electric field to electrically process the magnetic core after time. When the electric field or magnetic field processing timing reaches the set parameter requirement, the programmable logic control system PLC independently controls the electric field or the magnetic field not to be excited, and the total microwave field processing time is the time for initially enabling the temperature of the manganese-zinc ferrite to reach the set upper limit temperature, compared with the electric field processing time and the magnetic field processing timeSum of long time, i.e.
。
And S4, measuring the volume power loss of the manganese-zinc ferrite core after the electromagnetic microwave coupling treatment is finished, judging whether the volume power loss reaches a preset value, and if not, repeating the steps S1-S3. Because the sample is shaped in a mode of uneven mass distribution, the volume power consumption (kW/m 3) is used as a basis for analyzing the electromagnetic microwave coupling treatment effect. The parameters at the time of measurement are as follows: the magnetic field strength is 50mT, and the frequency is 400 kHz.
Example 3
In the embodiment, two magnetic core parts with large production volume and wide application range in manganese-zinc ferrite magnetic core parts are used for electromagnetic coupling treatment, namely a UI type transformer magnetic core and an EP13 type power magnetic core, wherein the UI type transformer magnetic core belongs to a high-frequency type transformer magnetic core and is multipurpose for mobile terminal charging equipment, and the EP13 type power magnetic core belongs to a power magnetic core and is widely applied to the fields of mobile terminal charging equipment, a program controlled switch terminal, precision electronic equipment and the like.
Before treatment, whether external power frequency alternating current is normally connected into a numerical control pulse electromagnetic microwave coupling processor (namely a device for improving the magnetic performance of manganese-zinc ferrite through coupling of an electric field and a magnetic field of a microwave field) is detected, a main power supply of the whole treatment device is firstly turned off, and a human body is prevented from being damaged by the pulse electromagnetic field and a stable microwave field in the operation process. After the pulse electric field circuit, the pulse magnetic field circuit and the pulse microwave field circuit are disconnected, the microwave generator 3 is pulled outwards to enable the pre-clamping mechanism 7 on the movable electrode chuck 5 to be close to the opening end of the shell 1 so as to have enough space for operation, the pre-clamping mechanism 7 is pulled to move towards one end of the fixed electrode chuck 52, the spring 72 is stretched, then the inflating device is started to inflate the air bag 753, after the air bag 753 is full of air, the elastic nail 751 is pushed to block the expanding sleeve 71 from retracting, the expanding sleeve 71 on the pre-clamping mechanism 7 is manually opened to clamp the magnetic core 9 to be processed in the expanding sleeve 71, after the microwave generator 3 is pushed to be close to the shell 1 and sealed and tightly abutted, the air cylinder 51 is started to extend the piston rod 511, the magnetic core 9 is made to be close to the fixed electrode chuck 52 until the movable electrode chuck 5 and the fixed electrode chuck 52 are both tightly abutted to the magnetic core 9, the magnetic core 9 presses the push rod 755 to open the valve core 754 to release the air in the air bag 753, the deflated bladder 753 may not provide sufficient support for the resilient pins 751 such that the resilient pins 751 drop into the restraint slots 752, thereby allowing the expansion shells 71 to retract to their original position and allowing only the ends of the core 9 to contact the two electrode clamps.
Example 3.1
If the core 9 is a UI type manganese zinc ferrite, the following: two parts of UI-MT11 and UI-MT9 are processed
The processing parameters of the pulsed electric field include: the voltage of the pulse electric field is 1.0V, and the frequency of single electric pulse
At 100Hz, a single group of pulse number
200, 1ms after each pulse group is applied, and the number of pulse groups processed
Is 100, the total number of pulses
20000 pieces, total time of electric field treatment
。
The processing parameters of the pulsed magnetic field include: pulsed magnetic field strength
1.0T and 1.2T respectively, and the action time of a single magnetic pulse
10s, the interval is 1s after each magnetic pulse is applied, and the total number of the magnetic pulses
10 times and 20 times respectively, and the total time of the action of the pulse magnetic field is
。
The processing parameters of the microwave field include: based on the hardware of a microwave generator, the electromagnetic field in the microwave generator has the change speed of 24.5 hundred million times, so that the microwave with the wavelength of 122mm and the frequency of 2450MHz can be excited, and the upper limit temperature value 101 ℃ and the lower limit temperature value 99 ℃ detected by a temperature sensor are set; the microwave field treatment process extends through the entire process.
And closing the microwave generation and temperature control circuit, the pulse magnetic field circuit and the pulse electric field circuit in sequence to perform microwave radiation and heat treatment, magnetic treatment and electric treatment on the two UI-type power magnetic cores. In the treatment process, the electric field, the magnetic field and the microwave field are mutually coupled, the interval of the electric field is 1ms every 0.2s, and the total treatment time of the electric field is about 200 s. The interval is 1s every 10s when the electric field and the magnetic field are applied, the total processing time of the magnetic field is related to the magnetizing times of the pulse magnetic field, the magnetizing times of UI-MT11 and UI-MT9 are respectively 10 and 20, and the total processing time of the magnetic field is respectively 110s and 220 s.
And after the treatment is finished, the volume power loss of the UI-MT9 magnetic core and the UI-MT11 magnetic core after the electromagnetic microwave coupling treatment is respectively measured.
Because the sample is shaped in a mode of uneven mass distribution, the volume power consumption (kW/m 3) is used as a basis for analyzing the electromagnetic microwave coupling treatment effect.
The parameters at the time of measurement were as follows: the magnetic field strength is 50mT, and the frequency is 400 kHz.
The measurement results are shown in the following table:
TABLE 1 UI-type Power core three-field coupling before and after processing volume power consumption measurement data
According to the measurement results and calculation, the volume power consumption of the UI-MT9 is reduced by 16.58% after being processed compared with that before being processed, the volume power consumption of the UI-MT11 is reduced by 12.17% after being processed compared with that before being processed, and the power loss of the two UI type power magnetic cores after being processed is obviously reduced.
Example 3.2
When the magnetic core 9 is an EP13 type Mn-Zn ferrite, exemplified by EP13-MT3, EP13-MT5, and EP13-MT14
The processing parameters of the pulsed electric field include: the voltage of the pulse electric field is 1.0V, and the frequency of single electric pulse
At 200Hz, a single group of pulse number
200, and processing the number of pulse groups with a gap of 1ms after each pulse group is applied
200, the total number of pulses
40000 pieces of electric field treatment time
。
The processing parameters of the pulsed magnetic field include: pulsed magnetic field strength
1.5T, 0.5T and 1.0T, single magnetic pulse action time
10s, the interval is 1s after each magnetic pulse is applied, and the total number of the magnetic pulses
Is 5, 10 and 50 times, and the total time of the action of the pulse magnetic field is
。
The processing parameters of the microwave field include: based on the hardware of a microwave generator, the electromagnetic field in the microwave generator has the change speed of 24.5 hundred million times, so that the microwave with the wavelength of 122mm and the frequency of 2450MHz can be excited, and the upper limit temperature value 101 ℃ and the lower limit temperature value 99 ℃ detected by a temperature sensor are set; the microwave field treatment process is carried out throughout the entire process.
And after the treatment, the volume power loss of the three EP13 type power magnetic cores after the electromagnetic microwave coupling treatment is respectively measured. The parameters at the time of measurement were as follows: the magnetic field intensity is 50mT, and the frequency is 400 kHz.
The measurement results are shown in the following table:
TABLE 2 EP13 model Power core three-field coupling Pre-and post-volume Power consumption measurement data
According to the measurement results and calculation, the volume power consumption of EP13-MT3 is reduced by 5.92% after being processed compared with that before being processed, the volume power consumption of EP13-MT5 is reduced by 6.12% after being processed compared with that before being processed, and the volume power consumption of EP13-MT14 is reduced by 4.51% after being processed compared with that before being processed, so that the power losses of the three EP13 type power magnetic cores are obviously reduced after being processed.
The principle of the coupling treatment of the manganese-zinc ferrite magnetic core by the microwave field, the electric field and the magnetic field is as follows:
the microwave field acts on the manganese-zinc ferrite magnetic core, microwave radiation can interact with polar molecules in the magnetic core, and the manganese-zinc ferrite can absorb electromagnetic wave energy, so that heat is uniformly generated from inside to outside, the existence of temperature gradient is avoided, the residual stress and curing shrinkage in the magnetic core can be reduced, the heating time is shortened, and the performance of the product is improved; meanwhile, due to the non-thermal effect of microwave radiation treatment, polar group molecules of the manganese-zinc ferrite can jump from a ground state to an excited state, deformation and vibration are generated, the microstructure of the magnetic core of the manganese-zinc ferrite is changed, the orientation degree of crystal grains of the manganese-zinc ferrite can be improved by combining the effect of electromagnetic coupling treatment, and the magnetic property of the manganese-zinc ferrite is greatly improved. The microwave radiation enables a plurality of active atoms and electrons to be contained in the microstructure crystal of the manganese-zinc ferrite, and after the pulse current acts on the magnetic core, the active atoms and electrons can be guided.
A pulsed current is a periodically varying current whose direction and intensity vary with time. The treatment is used as an instantaneous high-density energy input mode, has the advantages of short action time, high response speed, high energy utilization rate and the like, and can generate a short-time nonequilibrium effect under an extreme nonequilibrium condition to act on the organization structure and the performance of the material.
Magnetic field treatment is a non-contact energy transfer process, and the process of material magnetization is macroscopically represented by changes in the material structure and properties. Microscopically, the magnetic field can cause the increase of dislocation density, simultaneously, the obstruction of dislocation movement is reduced, further, the dislocation nucleation energy is reduced, the dislocation movement is accelerated, the internal stress release is promoted, and the larger dislocation density can improve the plasticity, the strength and the like of the manganese zinc ferrite material; in addition, the applied magnetic field can promote the change of the electron spin state by the free radicals and increase the length of the free segment of the dislocation, thereby promoting the movement and proliferation of the dislocation and improving the plasticity of the manganese-zinc ferrite material; the application of different magnetic field strength can affect the orientation density of the crystal texture, and the crystal texture is a phenomenon called preferred orientation when the crystal grain orientation is intensively distributed near a certain orientation position or certain orientation positions, so that the magnetic performance of the material is improved. Therefore, the magnetic treatment can greatly improve the magnetic performance, the power loss and other performances of the manganese-zinc ferrite.
It should be apparent to those skilled in the art that while the preferred embodiments of the present invention have been described, additional variations and modifications in these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the machine equivalent technology of the claims of the present invention, it is intended that the present invention also include such modifications and variations.
Claims (9)
1. The device is characterized by comprising a working cavity surrounded by an isolation frame, wherein a microwave generator is installed at one end of the isolation frame, an excitation coil is coaxially wound on the outer side surface of the isolation frame and is connected with a magnetic field circuit, a fixed electrode chuck and a movable electrode chuck are respectively arranged at two ends of the axis of the isolation frame, and the fixed electrode chuck and the movable electrode chuck are connected with the electric field circuit.
2. The device for improving the magnetic property of manganese-zinc-ferrite through the coupling of the electric field and the magnetic field of a microwave field according to claim 1, further comprising a shell, wherein the shell is sleeved on the excitation coil, one end of the shell, facing the microwave generator, is open, and a movable sealing piece matched with the end face of the microwave generator is arranged on the end face of the shell.
3. The device for improving the magnetic property of manganese-zinc-ferrite through the coupling of the electric field and the magnetic field of a microwave according to claim 2, wherein the shell is fixed on a workbench, the workbench is further provided with a guide rail, the bottom end of the microwave generator is installed on a sliding block, and the sliding block is connected to the guide rail in a sliding manner.
4. The device for improving the magnetic performance of manganese-zinc ferrite through the coupling of the electric field and the magnetic field of a microwave field according to claim 1, wherein the isolation frame is an alloy material frame with low resistivity and low magnetic permeability.
5. The device for improving the magnetic property of the manganese-zinc ferrite through the coupling of the electric field and the magnetic field of the microwave field according to claim 1, wherein the isolation frame comprises an isolation end plate and an isolation cylinder, one end of the isolation cylinder is fixed on the isolation end plate, one end of the isolation cylinder, which is far away from the isolation end plate, is slidably sleeved on the emission end of the microwave generator, and reflection inclined planes are arranged on the inner wall surfaces of the isolation end plate and the isolation cylinder.
6. The device for improving the magnetic property of the manganese-zinc ferrite through the coupling of the electric field and the magnetic field of the microwave field according to claim 2, wherein a temperature sensor is installed on the shell, a probe of the temperature sensor is introduced into the working cavity, the temperature sensor is electrically connected to the input end of a controller, and the output end of the controller is electrically connected to a control switch X of the microwave generator.
7. The device for improving the magnetic property of the manganese-zinc-ferrite through the coupling of the electric field and the magnetic field of the microwave field and the magnetic field according to claim 2, wherein the clamping end of the movable electrode chuck is provided with a pre-clamping mechanism capable of clamping and fixing the magnetic core, and the pre-clamping mechanism retreats to be completely separated from the magnetic core when the end part of the magnetic core is contacted with the fixed electrode chuck.
8. A method for improving the magnetic performance of manganese-zinc ferrite by microwave field electric field magnetic field coupling is characterized by comprising the following steps:
s1, closing the main power supply, clamping the magnetic core to be processed between the fixed electrode chuck and the movable electrode chuck, and placing the magnetic core to be processed in the working cavity to make the path of the magnetic core to be processed collinear on the axis of the magnet exciting coil;
s2, respectively setting the processing parameters of the microwave field, the pulse electric field and/or the pulse magnetic field according to the type of the manganese-zinc ferrite magnetic core,
the processing parameters of the pulsed electric field include: frequency of single electrical pulse
Single group of pulse number
Number of sets of pulses
(ii) a And/or
The processing parameters of the pulsed magnetic field include: pulsed magnetic field strength
Time of action of a single magnetic pulse
Total number of magnetic pulses
(ii) a And/or
The processing parameters of the microwave field include: setting an upper limit temperature value and a lower limit temperature value detected by a temperature sensor;
s3, according to the processing parameters of each field, simultaneously opening a microwave field, a pulse electric field and/or a pulse magnetic field, and performing one-field, two-field or three-field coupling processing on the magnetic core to be processed;
and S4, measuring the volume power loss value of the processed magnetic core, judging whether the volume power loss value reaches a preset value, and if not, repeating the steps S1-S3.
9. The method for improving the magnetic property of the manganese-zinc-ferrite through the coupling of the microwave field, the electric field and the magnetic field according to claim 8, wherein the coupling method of the microwave field, the pulse electric field and the pulse magnetic field in the step S3 is specifically as follows:
opening the microwave field to perform microwave radiation heat treatment on the magnetic core, starting the pulse magnetic field to perform magnetic treatment on the magnetic core after the temperature sensor detects that the surface temperature of the magnetic core reaches an upper limit temperature value
And starting a pulse electric field to electrically process the magnetic core after time.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115287414A (en) * | 2022-07-20 | 2022-11-04 | 武汉理工大学 | In-situ regulation and control technical device and method for electromagnetic composite field of aircraft titanium alloy blade material |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101568206A (en) * | 2009-01-21 | 2009-10-28 | 徐艳姬 | Energy-saving easily-changeable high-temperature microwave heating chamber and manufacturing method thereof |
| CN102412043A (en) * | 2011-07-28 | 2012-04-11 | 横店集团东磁股份有限公司 | Manufacturing method of anisotropic NdFeB radial orientation magnet ring |
| CN102976730A (en) * | 2012-11-09 | 2013-03-20 | 四川大学 | Method for preparing MnZn ferrite magnetic core by multi-physical field coupling |
| CN103974516A (en) * | 2014-05-22 | 2014-08-06 | 哈尔滨工业大学 | Microwave and plasma interacting device in magnetic plasma under condition that magnetic field and electric field are perpendicular |
| CN104297273A (en) * | 2014-11-13 | 2015-01-21 | 中国科学技术大学 | Device for real-time nondestructive detecting and quantitative regulation and control of microwave preparation process of materials |
| US20150064360A1 (en) * | 2013-08-30 | 2015-03-05 | Ut-Battelle, Llc | Apparatus and method for materials processing utilizing a rotating magnetic field |
| US20160083821A1 (en) * | 2014-09-19 | 2016-03-24 | Hitachi, Ltd. | Steel material, material processing method, and material processing apparatus |
| CN106029804A (en) * | 2013-11-29 | 2016-10-12 | 普罗奥尼克股份有限公司 | Method for curing an adhesive using microwave irradiation |
| CN107052494A (en) * | 2017-04-10 | 2017-08-18 | 河南科技大学 | A kind of device and method based on raising material wetability under multi- scenarios method |
| CN109743806A (en) * | 2018-12-17 | 2019-05-10 | 四川大学 | A kind of method and its dual-port microwave heating equipment promoting microwave heating uniformity |
| CN109825677A (en) * | 2019-04-04 | 2019-05-31 | 四川大学 | Electromagnetic coupling material handling device |
| CN211448802U (en) * | 2019-12-23 | 2020-09-08 | 武汉理工大学 | Automobile exhaust multi-effect purification device based on microwave heat and non-heat effect catalysis |
| CN112029962A (en) * | 2020-09-03 | 2020-12-04 | 四川大学 | Bipolar electrode-twin coil pulse electromagnetic coupling strengthens metallic material device |
| CN113766689A (en) * | 2021-09-22 | 2021-12-07 | 四川大学 | Microwave heating structure, method and system |
| CN113816734A (en) * | 2021-10-08 | 2021-12-21 | 横店集团东磁股份有限公司 | NiCuZn ferrite material and preparation method and application thereof |
-
2022
- 2022-06-07 CN CN202210634208.3A patent/CN114709068B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101568206A (en) * | 2009-01-21 | 2009-10-28 | 徐艳姬 | Energy-saving easily-changeable high-temperature microwave heating chamber and manufacturing method thereof |
| CN102412043A (en) * | 2011-07-28 | 2012-04-11 | 横店集团东磁股份有限公司 | Manufacturing method of anisotropic NdFeB radial orientation magnet ring |
| CN102976730A (en) * | 2012-11-09 | 2013-03-20 | 四川大学 | Method for preparing MnZn ferrite magnetic core by multi-physical field coupling |
| US20150064360A1 (en) * | 2013-08-30 | 2015-03-05 | Ut-Battelle, Llc | Apparatus and method for materials processing utilizing a rotating magnetic field |
| CN106029804A (en) * | 2013-11-29 | 2016-10-12 | 普罗奥尼克股份有限公司 | Method for curing an adhesive using microwave irradiation |
| CN103974516A (en) * | 2014-05-22 | 2014-08-06 | 哈尔滨工业大学 | Microwave and plasma interacting device in magnetic plasma under condition that magnetic field and electric field are perpendicular |
| US20160083821A1 (en) * | 2014-09-19 | 2016-03-24 | Hitachi, Ltd. | Steel material, material processing method, and material processing apparatus |
| CN104297273A (en) * | 2014-11-13 | 2015-01-21 | 中国科学技术大学 | Device for real-time nondestructive detecting and quantitative regulation and control of microwave preparation process of materials |
| CN107052494A (en) * | 2017-04-10 | 2017-08-18 | 河南科技大学 | A kind of device and method based on raising material wetability under multi- scenarios method |
| CN109743806A (en) * | 2018-12-17 | 2019-05-10 | 四川大学 | A kind of method and its dual-port microwave heating equipment promoting microwave heating uniformity |
| CN109825677A (en) * | 2019-04-04 | 2019-05-31 | 四川大学 | Electromagnetic coupling material handling device |
| CN211448802U (en) * | 2019-12-23 | 2020-09-08 | 武汉理工大学 | Automobile exhaust multi-effect purification device based on microwave heat and non-heat effect catalysis |
| CN112029962A (en) * | 2020-09-03 | 2020-12-04 | 四川大学 | Bipolar electrode-twin coil pulse electromagnetic coupling strengthens metallic material device |
| CN113766689A (en) * | 2021-09-22 | 2021-12-07 | 四川大学 | Microwave heating structure, method and system |
| CN113816734A (en) * | 2021-10-08 | 2021-12-21 | 横店集团东磁股份有限公司 | NiCuZn ferrite material and preparation method and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| CHONG XU，ET AL: "Electromagnetic Black Hole for Efficiency Microwave Heating Based on Gradient-Index Metamaterials in Multimode Cavities", 《IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS》 * |
| 霍占伟: "多物理场耦合作用下铁磁材料力学响应的研究", 《中国优秀硕士学位论文全文数据库工程科技II辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115287414A (en) * | 2022-07-20 | 2022-11-04 | 武汉理工大学 | In-situ regulation and control technical device and method for electromagnetic composite field of aircraft titanium alloy blade material |
| CN115287414B (en) * | 2022-07-20 | 2024-01-30 | 武汉理工大学 | Electromagnetic composite field in-situ regulation and control technical device and method for aeronautical titanium alloy blade material |
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