CN106125021B - The measurement method of permeability magnetic material characteristic under a kind of quadrature bias magnetic field - Google Patents
The measurement method of permeability magnetic material characteristic under a kind of quadrature bias magnetic field Download PDFInfo
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- CN106125021B CN106125021B CN201610425066.4A CN201610425066A CN106125021B CN 106125021 B CN106125021 B CN 106125021B CN 201610425066 A CN201610425066 A CN 201610425066A CN 106125021 B CN106125021 B CN 106125021B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
Abstract
The present invention provides a kind of characteristic measurement methods of permeability magnetic material under quadrature bias magnetic field, are implemented by the measuring system of permeability magnetic material characteristic under quadrature bias magnetic field；The measuring system includes digital power system power supply, quadrature field biasing generation device, signal picker and computer processing unit, quadrature bias magnetic field generation device includes two U-shaped units and tested cross print, U-shaped unit includes bottom iron core, two side iron cores, Exciting Windings for Transverse Differential Protection, induction winding and two permanent magnets, and Exciting Windings for Transverse Differential Protection and induction winding are separately positioned on two side iron cores.By being passed through alternating current to upper layer Exciting Windings for Transverse Differential Protection and lower layer's Exciting Windings for Transverse Differential Protection respectively, and the induced potential of the electric current and induction winding of Exciting Windings for Transverse Differential Protection is acquired by data collector, it is sent into calculation processing unit by data processing, and then obtains the magnetization characteristic of tested permeability magnetic material；The characteristic measurement method of permeability magnetic material under the quadrature bias magnetic field of the present invention, simple in structure, easy to operate, measurement accuracy is adjustable.
Description
Technical field
The present invention relates to a kind of measurement methods of permeability magnetic material magnetic characteristic, more particularly to one kind to be surveyed under quadrature bias magnetic field
The method for measuring permeability magnetic material characteristic.
Background technology
With the development of science and technology, permanent-magnet material is widely used in industrial production and social life.Magnetic
Feature measurement generally uses the indirect method of measurement.Such as electric current, voltage, active force etc. can be measured directly by corresponding instrument, and
Magnetic flux, the magnetics such as magnetic conductivity amount must be calculated by the physical quantities result such as calorifics, electricity, optics.More commonly used
Method is to utilize the law of electromagnetic induction, and magnetics amount is extrapolated from the electrical quantities of measurement.But there are external magnetic field the case where
Under, the magnetization characteristic of permeability magnetic material can change so that the measurement of magnetization characteristic becomes more difficult.Wherein, with biasing
Quadrature field is increasingly used in various occasions.The characteristic of permeability magnetic material is surveyed under sine alternating magnetic field at present
Examination, the device of magnetization characteristic is tested not under quadrature field.Therefore, the magnetic of the permeability magnetic material under offset orthogonal magnetic field is measured
Change characteristic, becomes a kind of needs.
Invention content
Goal of the invention：For the above-mentioned prior art, a kind of measurement side of permeability magnetic material characteristic under quadrature bias magnetic field is proposed
Method can measure the characteristic of the different permeability magnetic materials under quadrature bias magnetic field.
Technical solution：The measurement method of permeability magnetic material characteristic under a kind of quadrature bias magnetic field, by being led under quadrature bias magnetic field
The measuring system of magnetic material property is implemented；The measuring system includes quadrature field biasing generation device；Quadrature bias magnetic field generates
Device include two U-shaped units and tested cross print, U-shaped unit include bottom iron core, two side iron cores, excitation around
Group, induction winding, two permanent magnets；Exciting Windings for Transverse Differential Protection and induction winding are separately positioned on two side iron cores, umber of turn
It is N；Two permanent magnets are separately positioned on the junction of the bottom iron core and two side iron cores of U-shaped unit, and two permanent magnetism
The contact surface polarity of body and two side iron cores is on the contrary, contact area is SP；The direction of magnetization length of permanent magnet is lP；Two U-shaped
Unit opening is opposite, is separately mounted to the upper and lower of cross test sample；The magnetic circuit average length of U-shaped unit is l；
The sectional area S of tested cross print magnetic field orthotropic partt；Tested cross print is averaged the length of magnetic path as lt；
Specifically include following steps：
1) it, is given in the upper layer Exciting Windings for Transverse Differential Protection and lower layer's Exciting Windings for Transverse Differential Protection and is led to respectively by the digital power system power supply
Enter alternating current；It is H that electricity excitation magnetic field intensity is generated in the excitation winding pole coil of upper layer1, magnetic induction intensity B1；Lower layer's excitation around
It is H that electricity excitation magnetic field intensity is generated in group coil2, magnetic induction intensity B2；At this point, will production in the induction coil of the upper and lower
Raw counter electromotive force；Current value (the i of upper layer Exciting Windings for Transverse Differential Protection and lower layer's Exciting Windings for Transverse Differential Protection is acquired by data signal acquisition unitupWith
idown) and upper layer induction winding counter electromotive force E1The counter electromotive force E of winding is incuded with lower layer2；
2), according to Ampere circuit law：With the current value of acquisition, electricity excitation magnetic field intensity H can be calculated1
And H2；The magnetic field intensity H in test sample is obtained by Vector modulationiAnd H1And HiAngle α1；Meanwhile according toWith Φ=B × St, obtained magnetic induction density B1And B2, and the magnetic field in test sample is obtained according to Vector modulation
Intensity BiAnd angle [alpha]2；
3) the amplitude phase frequency for, changing the upper and lower Exciting Windings for Transverse Differential Protection electric current, obtains a series of (Hi, α1) and (Bi, α2)
Value, the magnetization characteristic under quadrature bias magnetic field can be obtained according to this series of value.
Further, it keeps amplitude phase, the frequency of the upper and lower Exciting Windings for Transverse Differential Protection electric current identical, amplitude is made to change.
Further, it keeps amplitude, the phase of the upper and lower Exciting Windings for Transverse Differential Protection electric current identical, frequency is made to change.
Further, it keeps amplitude, the frequency of the upper and lower Exciting Windings for Transverse Differential Protection electric current identical, makes phase change.
Further, it keeps the amplitude of the upper and lower Exciting Windings for Transverse Differential Protection electric current identical, phase and frequency is made to change.
Further, it keeps the phase of the upper and lower Exciting Windings for Transverse Differential Protection electric current identical, amplitude and frequency is made to change.
Further, it keeps the frequency of the upper and lower Exciting Windings for Transverse Differential Protection electric current identical, phase and amplitude is made to change.
The exciting current amplitude range be 10V~280V, frequency range be 20Hz~1000Hz, 0 ° of phase angular region~
180 °, and draw the permeability magnetic material magnetization characteristic under quadrature field bias condition.
Advantageous effect：Invention proposes a kind of method for testing permeability magnetic material characteristic under orthogonal permanent magnetic field, this method base
In a new device, which uses the high-performance Ne-Fe-B permanent magnet that the trade mark is N35H and is embedded in U-shaped iron core unit,
It generates quadrature bias magnetic field, has simple in structure, and the quadrature field generated is stable and reliable for performance.
When using test method provided by the invention, as long as being passed through inhomogeneity to upper layer Exciting Windings for Transverse Differential Protection and lower layer's Exciting Windings for Transverse Differential Protection
Type, out of phase, different amplitudes, the electric current of different frequency, you can to obtain current type, phase, amplitude and frequency to just
The magnetization characteristic in magnetic field and the permeability magnetic material under current field collective effect is handed over, it is easy to operate, as a result reliably.
The magnetization characteristic of different permanent magnets can also be tested using the present invention by replacing permanent magnet.
More and more extensive with the application of quadrature field, the concrete application for the present invention provides wide space.In addition,
The present invention need not generate orthogonal permanent magnetic field by means of extraneous tool, can be generated just by the permanent magnet on device
Permanent magnetic field is handed over, implements very simple.
Description of the drawings
Fig. 1 is measuring system block diagram
Fig. 2 is the structural schematic diagram for measuring permeability magnetic material characteristic measuring device under quadrature field；
Fig. 3 is that magnetic field intensity H-vector and magnetic induction density B synthesize schematic diagram.
In figure, 1-1 is upper layer Exciting Windings for Transverse Differential Protection, and 1-2 is that upper layer incudes winding, and 3 be test sample, and 2-1 is the first permanent magnet,
2-2 is the second permanent magnet, and 4-1 is upper layer first side iron core, and 4-2 is upper layer second side iron core, and 5 be the first bottom iron core,
6-1 is lower layer's Exciting Windings for Transverse Differential Protection, and 6-2 is that lower layer incudes winding, and 7-1 is third permanent magnet, and 7-2 is the 4th permanent magnet, and 8-1 is lower layer
First side iron core, 8-2 are lower layer's second side iron core, and 9 be the second bottom iron core.
Specific implementation mode
The present invention is further described below in conjunction with the accompanying drawings.
The measurement method of permeability magnetic material characteristic under a kind of quadrature bias magnetic field, which is characterized in that by under quadrature bias magnetic field
The measuring system of permeability magnetic material characteristic is implemented；The measuring system includes digital power system power supply, quadrature field biasing generation device, encourages
Magnetic winding, induction winding, signal picker and computer processing unit；The quadrature bias magnetic field generation device includes two embedding
There are the U-shaped unit and test sample of permanent magnet.
The U-shaped unit includes bottom iron core, two side iron cores, Exciting Windings for Transverse Differential Protection and two permanent magnets, it is described two forever
Magnet is separately positioned on the junction of the bottom iron core and two side iron cores of the U-shaped unit, and two permanent magnets and two
The contact surface polarity of side iron core is on the contrary, distinguish coiling Exciting Windings for Transverse Differential Protection and induction winding, coiling direction on two side iron cores
Unanimously；The test sample is decussate texture, and described two U-shaped unit openings are opposite and orthogonal mounted on institute
The upper and lower for the cross test sample stated.
Specifically, the U-shaped unit in upper layer includes the first bottom iron core 5, upper layer first side iron core 4-1 and second side iron core
4-2；The S of one end of first bottom iron core 5 and the first permanent magnet 2-1 are very viscous to be connect, upper layer first side iron core 4-1 and first
The N of permanent magnet 2-1 is very viscous to be connect, and vertical with the first bottom iron core 5；The other end and the second permanent magnetism of first bottom iron core 5
The N of body 2-2 is very viscous to be connect, and upper layer second side iron core 4-2 and the S of the second permanent magnet 2-2 are very viscous, connect and with the first bottom iron core 5
Vertically.The U-shaped unit of lower layer includes the second bottom iron core 9, lower layer first side iron core 8-1 and lower layer second side iron core 8-2；The
The S of one end of two bottom iron cores 9 and third permanent magnet 7-1 are very viscous to be connect, lower layer first side iron core 8-1 and third permanent magnet 7-1
N it is very viscous connect, and it is vertical with the second bottom iron core 9；The poles N of the other end and the 4th permanent magnet 7-2 of second bottom iron core 9
Bonding, the S of lower layer second side iron core 8-2 and the 4th permanent magnet 7-2 is very viscous to be connect, and vertical with the second bottom iron core 9.Described
It is wound with upper layer Exciting Windings for Transverse Differential Protection 1-1 on the iron core unit 4-1 of upper layer first side, coiling on the upper layer second side iron core 4-2
There is upper layer induction winding 1-2；It is wound with lower layer Exciting Windings for Transverse Differential Protection 6-1, the lower layer second on the lower layer first side iron core 8-1
Lower layer induction winding 6-2 is wound on the iron core 8-2 of side.The upper and lower Exciting Windings for Transverse Differential Protection and the upper and lower induction
Winding is all made of multiply enameled wire and around coiling.
A kind of measurement method for testing permeability magnetic material characteristic under orthogonal permanent magnet bias magnetic field, measuring system block diagram such as Fig. 1
It is shown, include the following steps：
1) upper and lower layer Exciting Windings for Transverse Differential Protection and upper and lower layer induction umber of turn are N, permanent magnet and bottom iron core and side iron core
Contact area be SP, direction of magnetization length is lP, U-shaped unit magnetic circuit average length is l, test sample magnetic field orthotropic part
Sectional area is St, test sample be averaged the length of magnetic path be lt；These parameter values are measured and the computer disposal list is written
Member；Meanwhile the permanent magnet magnetization characteristic curve measured in advance being written to the computer processing unit；Prepare the exchange measured
Electric amplitude range is 10V~280V, and frequency range is 20Hz~1000Hz, 0 °~180 ° of phase angular region.
2) it is given in the upper layer Exciting Windings for Transverse Differential Protection and lower layer's Exciting Windings for Transverse Differential Protection and is led to respectively by the digital power system power supply
Enter identical frequency, phase, but the alternating current of different amplitudes；It is H that electricity excitation magnetic field intensity is generated in the excitation winding pole coil of upper layer1,
Its magnetic induction intensity is B1；It is H that electricity excitation magnetic field intensity is generated in lower layer's excitation winding pole coil2, magnetic induction intensity B2；This
When, counter electromotive force, respectively E will be generated in the induction coil of the upper and lower1And E2；It is acquired by the data signal acquisition device
The upper layer Exciting Windings for Transverse Differential Protection electric current of the digital power system power supply and the data of lower layer's Exciting Windings for Transverse Differential Protection electric current and upper layer incude winding
The counter electromotive force of counter electromotive force and lower layer's induction winding, and computer processing unit will be sent into after signal processing.
3) computer processing unit is according to Ampere circuit law：Calculate electricity excitation magnetic field intensity H1
And H2；If ignoring leakage field, due to the remanent magnetism M of known permanent magnet, the computer processing unit is tested by Vector modulation
Magnetic field intensity H in printaiAnd angle [alpha]a1；Meanwhile according toWith Φ=B × St, obtained magnetic induction density B1With
B2, and the magnetic field intensity B in test sample is obtained according to Vector modulationaiAnd angle [alpha]a2。
According to the method described above, the upper layer Exciting Windings for Transverse Differential Protection and the lower layer is given to encourage respectively by the digital power system power supply
Identical amplitude, same phase, but different frequency alternating currents are passed through in magnetic winding；Electrical excitation is generated in the excitation winding pole coil of upper layer
Magnetic field intensity is H1, magnetic induction intensity B1；It is H that electricity excitation magnetic field intensity is generated in lower layer's excitation winding pole coil2, magnetic strength
It is B to answer intensity2；At this point, counter electromotive force, respectively E will be generated in the induction coil of the upper and lower1And E2；Believed by the data
Number collector acquires the data of the upper layer Exciting Windings for Transverse Differential Protection electric current and lower layer's Exciting Windings for Transverse Differential Protection electric current of the digital power system power supply, Yi Jishang
The counter electromotive force of the counter electromotive force and lower layer's induction winding of layer induction winding, and computer disposal list will be sent into after signal processing
Member.
The computer processing unit is according to Ampere circuit law：Calculate electricity excitation magnetic field intensity H1With
H2；If ignoring leakage field, due to the remanent magnetism M of known permanent magnet, the computer processing unit obtains test specimens by Vector modulation
Magnetic field intensity H in piecefiAnd angle [alpha]f1；Meanwhile according toWith Φ=B × St, obtained magnetic induction density B1And B2,
And the magnetic field intensity B in test sample is obtained according to Vector modulationfiAnd angle [alpha]f2。
It is given in the upper layer Exciting Windings for Transverse Differential Protection and lower layer's Exciting Windings for Transverse Differential Protection and is passed through respectively by the digital power system power supply
Identical amplitude, frequency, but the alternating current of out of phase；It is H that electricity excitation magnetic field intensity is generated in the excitation winding pole coil of upper layer1,
Magnetic induction intensity is B1；It is H that electricity excitation magnetic field intensity is generated in lower layer's excitation winding pole coil2, magnetic induction intensity B2；At this point,
Counter electromotive force, respectively E will be generated in the induction coil of the upper and lower1And E2；Described in data signal acquisition device acquisition
The anti-electricity of the upper layer Exciting Windings for Transverse Differential Protection electric current of digital power system power supply and the data of lower layer's Exciting Windings for Transverse Differential Protection electric current and upper layer induction winding
The counter electromotive force of kinetic potential and lower layer's induction winding, and computer processing unit will be sent into after signal processing.
The computer processing unit is according to Ampere circuit law：Calculate electricity excitation magnetic field intensity H1With
H2；If ignoring leakage field, due to the remanent magnetism M of known permanent magnet, the computer processing unit obtains test specimens by Vector modulation
Magnetic field intensity H in piecepiAnd angle [alpha]p1；Meanwhile according toWith Φ=B × St, obtained magnetic induction density B1And B2,
And the magnetic field intensity B in test sample is obtained according to Vector modulationpiAnd angle [alpha]p2。
It is given in the upper layer Exciting Windings for Transverse Differential Protection and lower layer's Exciting Windings for Transverse Differential Protection and is passed through respectively by the digital power system power supply
Identical amplitude, but differ the alternating current of phase and frequency；It is H that electricity excitation magnetic field intensity is generated in the excitation winding pole coil of upper layer1,
Its magnetic induction intensity is B1；It is H that electricity excitation magnetic field intensity is generated in lower layer's excitation winding pole coil2, magnetic induction intensity B2；This
When, counter electromotive force, respectively E will be generated in the induction coil of the upper and lower1And E2；It is acquired by the data signal acquisition device
The upper layer Exciting Windings for Transverse Differential Protection electric current of the digital power system power supply and the data of lower layer's Exciting Windings for Transverse Differential Protection electric current and upper layer incude winding
The counter electromotive force of counter electromotive force and lower layer's induction winding, and computer processing unit will be sent into after signal processing.
The computer processing unit is according to Ampere circuit law：Calculate electricity excitation magnetic field intensity H1With
H2；If ignoring leakage field, due to the remanent magnetism M of known permanent magnet, the computer processing unit obtains test specimens by Vector modulation
Magnetic field intensity H in piecepfiAnd angle [alpha]pf1；Meanwhile according toWith Φ=B × St, obtained magnetic induction density B1With
B2, and the magnetic field intensity B in test sample is obtained according to Vector modulationpfiAnd angle [alpha]pf2。
It is given in the upper layer Exciting Windings for Transverse Differential Protection and lower layer's Exciting Windings for Transverse Differential Protection and is passed through respectively by the digital power system power supply
Same phase, but differ the alternating current of amplitude and frequency；It is H that electricity excitation magnetic field intensity is generated in the excitation winding pole coil of upper layer1,
Its magnetic induction intensity is B1；It is H that electricity excitation magnetic field intensity is generated in lower layer's excitation winding pole coil2, magnetic induction intensity B2；This
When, counter electromotive force, respectively E will be generated in the induction coil of the upper and lower1And E2；It is acquired by the data signal acquisition device
The upper layer Exciting Windings for Transverse Differential Protection electric current of the digital power system power supply and the data of lower layer's Exciting Windings for Transverse Differential Protection electric current and upper layer incude winding
The counter electromotive force of counter electromotive force and lower layer's induction winding, and computer processing unit will be sent into after signal processing.
The computer processing unit is according to Ampere circuit law：Calculate electricity excitation magnetic field intensity H1With
H2；If ignoring leakage field, due to the remanent magnetism M of known permanent magnet, the computer processing unit obtains test specimens by Vector modulation
Magnetic field intensity H in pieceafiAnd angle [alpha]af1；Meanwhile according toWith Φ=B × St, obtained magnetic induction density B1With
B2, and the magnetic field intensity B in test sample is obtained according to Vector modulationafiAnd angle [alpha]af2。
It is given in the upper layer Exciting Windings for Transverse Differential Protection and lower layer's Exciting Windings for Transverse Differential Protection and is passed through respectively by the digital power system power supply
Identical frequency, but differ the alternating current of phase and amplitude；It is H that electricity excitation magnetic field intensity is generated in the excitation winding pole coil of upper layer1,
Its magnetic induction intensity is B1；It is H that electricity excitation magnetic field intensity is generated in lower layer's excitation winding pole coil2, magnetic induction intensity B2；This
When, counter electromotive force, respectively E will be generated in the induction coil of the upper and lower1And E2；It is acquired by the data signal acquisition device
The upper layer Exciting Windings for Transverse Differential Protection electric current of the digital power system power supply and the data of lower layer's Exciting Windings for Transverse Differential Protection electric current and upper layer incude winding
The counter electromotive force of counter electromotive force and lower layer's induction winding, and computer processing unit will be sent into after signal processing.
The computer processing unit is according to Ampere circuit law：Calculate electricity excitation magnetic field intensity H1With
H2；If ignoring leakage field, due to the remanent magnetism M of known permanent magnet, the computer processing unit obtains test specimens by Vector modulation
Magnetic field intensity H in piecepaiAnd angle [alpha]pa1；Meanwhile according toWith Φ=B × St, obtained magnetic induction density B1With
B2, and the magnetic field intensity B in test sample is obtained according to Vector modulationpaiAnd angle [alpha]pa2。
It is 10V~280V to arrange and export alternating current amplitude range, and frequency range is 20Hz~1000Hz, phase angular region
0~180 ° of measured value, and draw the permeability magnetic material magnetization characteristic in above range under quadrature field bias condition.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (8)
1. the measurement method of permeability magnetic material characteristic under a kind of quadrature bias magnetic field, which is characterized in that by being led under quadrature bias magnetic field
The measuring system of magnetic material property is implemented；The measuring system includes quadrature bias magnetic field generation device；The quadrature bias magnetic field
Generation device includes two U-shaped units and tested cross print, and U-shaped unit includes bottom iron core, two side iron cores, excitations
Winding, induction winding, two permanent magnets；The Exciting Windings for Transverse Differential Protection and induction winding are separately positioned on two side iron cores, around
Group the number of turns is N；Described two permanent magnets are separately positioned on the junction of the bottom iron core and two side iron cores of U-shaped unit,
And the contact surface polarity of two permanent magnets and two side iron cores is on the contrary, contact area is SP；The direction of magnetization of the permanent magnet
Length is lP；Described two U-shaped unit openings are opposite, are separately mounted to the upper and lower of cross test sample, wherein
Two beginnings of the U-shaped unit in upper layer are respectively placed on the non-adjacent bipod of tested cross print, two of the U-shaped unit of lower layer
Beginning is respectively placed on the other bipod of tested cross print；The magnetic circuit average length of the U-shaped unit is l；The quilt
Survey the sectional area S of cross print magnetic field orthotropic partt；The tested cross print is averaged the length of magnetic path as lt；
Specifically include following steps：
1), by digital power system power supply respectively to being passed through alternating current in upper layer Exciting Windings for Transverse Differential Protection and lower layer's Exciting Windings for Transverse Differential Protection；Upper layer excitation
It is H that electricity excitation magnetic field intensity is generated in winding coil1, magnetic induction intensity B1；Electrical excitation is generated in lower layer's excitation winding pole coil
Magnetic field intensity is H2, magnetic induction intensity B2；At this point, counter electromotive force will be generated in the induction coil of the upper and lower；Pass through data
Signal gathering unit acquires the current value of upper layer Exciting Windings for Transverse Differential Protection and lower layer's Exciting Windings for Transverse Differential Protection, respectively iupAnd idownAnd upper layer sense
Answer the counter electromotive force E of winding1The counter electromotive force E of winding is incuded with lower layer2；
2), according to Ampere circuit law：With the current value of acquisition, electricity excitation magnetic field intensity H can be calculated1And H2；
The magnetic field intensity H in test sample is obtained by Vector modulationiAnd H1And HiAngle α1；Meanwhile according toAnd Φ
=B × St, obtained magnetic induction density B1And B2, and the magnetic field intensity B in test sample is obtained according to Vector modulationiAnd angle
α2；
3) the amplitude phase frequency for, changing the upper and lower Exciting Windings for Transverse Differential Protection electric current, obtains a series of (Hi, α1) and (Bi, α2) value, root
The magnetization characteristic under quadrature bias magnetic field can be obtained according to this series of value.
2. the measurement method of permeability magnetic material characteristic under a kind of quadrature bias magnetic field as described in claim 1, it is characterised in that：It protects
Amplitude phase, the frequency for holding the upper and lower Exciting Windings for Transverse Differential Protection electric current are identical, and amplitude is made to change.
3. the measurement method of permeability magnetic material characteristic under a kind of quadrature bias magnetic field as described in claim 1, it is characterised in that：It protects
Amplitude, the phase for holding the upper and lower Exciting Windings for Transverse Differential Protection electric current are identical, and frequency is made to change.
4. the measurement method of permeability magnetic material characteristic under a kind of quadrature bias magnetic field as described in claim 1, it is characterised in that：It protects
Amplitude, the frequency for holding the upper and lower Exciting Windings for Transverse Differential Protection electric current are identical, make phase change.
5. the measurement method of permeability magnetic material characteristic under a kind of quadrature bias magnetic field as described in claim 1, it is characterised in that：It protects
The amplitude for holding the upper and lower Exciting Windings for Transverse Differential Protection electric current is identical, and phase and frequency is made to change.
6. the measurement method of permeability magnetic material characteristic under a kind of quadrature bias magnetic field as described in claim 1, it is characterised in that：It protects
The phase for holding the upper and lower Exciting Windings for Transverse Differential Protection electric current is identical, and amplitude and frequency is made to change.
7. the measurement method of permeability magnetic material characteristic under a kind of quadrature bias magnetic field as described in claim 1, it is characterised in that：It protects
The frequency for holding the upper and lower Exciting Windings for Transverse Differential Protection electric current is identical, and phase and amplitude is made to change.
8. the measurement method of permeability magnetic material characteristic, feature under a kind of quadrature bias magnetic field as described in claim 1~7 is any
It is：Alternating current amplitude range is 10V~280V, and frequency range is 20Hz~1000Hz, 0 °~180 ° of phase angular region, and painting
Permeability magnetic material magnetization characteristic under quadrature field bias condition processed.
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| 基于二维磁特性测量的电工钢片矢量磁滞模型;张艳丽 等;《中国电机工程学报》;20100125;第30卷(第3期);第130-135页 * |
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| CN106125021A (en) | 2016-11-16 |
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