CN109541507A - Monolithic ferrometer, detection device and detection method for grain-oriented Si steel sheet performance detection - Google Patents
Monolithic ferrometer, detection device and detection method for grain-oriented Si steel sheet performance detection Download PDFInfo
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- CN109541507A CN109541507A CN201811544873.3A CN201811544873A CN109541507A CN 109541507 A CN109541507 A CN 109541507A CN 201811544873 A CN201811544873 A CN 201811544873A CN 109541507 A CN109541507 A CN 109541507A
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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
- G01R33/1223—Measuring permeability, i.e. permeameters
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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
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/04—Measuring direction or magnitude of magnetic fields or magnetic flux using the flux-gate principle
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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
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
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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
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/10—Plotting field distribution ; Measuring field distribution
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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
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Abstract
The invention discloses a kind of monolithic ferrometers for grain-oriented Si steel sheet performance detection, including U-shaped upper magnet yoke, U-shaped lower yoke, primary coil winding, secondary coil winding, H coil windings and support plate；Secondary coil winding is located inside primary coil winding and is arranged in support plate, and sample to be tested is placed in support plate and is located among secondary coil winding, and H coil windings are located at the lower section at position among sample to be tested lower surface；H coil windings include the H coil unit of 3~5 equal in magnitude, equidistantly distributeds and arranged in series, and all H coil units are along the lower section substantially symmetrical about its central axis for being distributed in position among sample to be tested lower surface of sample to be tested.A kind of detection device and detection method are also provided, directly measured using H coil windings electrical steel strip monolithic sample magnetic polarization intensity and using digital air flux compensation the result that measures of detection method closer to sample true value.
Description
Technical field
The invention belongs to oriented silicon steel detection technique fields, and in particular to one kind is used for grain-oriented Si steel sheet performance detection
Monolithic ferrometer, detection device and detection method.
Background technique
Currently, China has become orientation silicon steel and produces a ring most crucial in world's domain, meanwhile, AC magnetic is
The core index and transformer of silicon steel product, electromechanics trade carry out the core competitive power during design of transformer, products application
Property index, be embody energy-saving and environmental protection important parameter.Therefore, how the magnetic property of accurate evaluation silicon steel product becomes electrician
The important topic of industry.
Currently, domestic orientation silicon steel (electrical sheet) monolithic Alternative Magnetic Properties Measuring mainly uses standard GB/T 13789-
2008 " with the method for single chip tester measurement electrical steel strip (piece) magnetic property ", also commonly known as " exciting current method ", are arranging
Effective magnetic circuit length under, adjustment secondary coil voltage make sample to be tested reach as defined in measure after magnetic polarization intensity, this is one
Kind indirect measurement method.But since effective magnetic circuit length is that an about definite value with going deep into for research finds effective magnetic
Road length can constantly change with the factors such as the material and manufacture craft of monolithic ferrometer, sample and different test condition, practical
The effective magnetic circuit length of variation and the deviation for arranging effective magnetic circuit length bring the systematic error in measurement, keep measurement result inclined
From true value.
Chinese invention patent application (application publication number CN108226826, data of publication of application 2018.6.29)) disclose one
Kind monolithic ferrometer, monolithic specimen measurement device and measurement method, mainly standardize primary, secondary coil winding, use
In the magnetic property of the narrowbands sample different zones such as measurement amorphous alloy, but the examination of small size such as 265mm × 142mm can only be directed to
Sample, and the actual magnetic field strength of large scale 500mm × 500mm monolithic specimen surface can not accurately be measured.
Summary of the invention
The purpose of the present invention is to above-mentioned technological deficiency, provide a kind of closer sample true value for oriented silicon
Monolithic ferrometer, detection device and the detection method of steel disc performance detection.
To achieve the above object, the monolithic ferrometer for grain-oriented Si steel sheet performance detection designed by the present invention, including U
Type upper magnet yoke, U-shaped lower yoke, primary coil winding, secondary coil winding, H coil windings and support plate；The U-shaped upper magnet yoke
A closed yoke is arranged symmetrically and is combined to form with the U-shaped lower yoke, and the support plate is located at the inside of closed yoke；Institute
It states secondary coil winding to be located inside the primary coil winding and be arranged in the support plate, sample to be tested is placed in branch
On fagging and it is located among secondary coil winding, H coil windings are located at the lower section at position among sample to be tested lower surface；The H
Coil windings include the H coil unit of 3~5 equal in magnitude, equidistantly distributeds and arranged in series, all H coil units along to
The lower section substantially symmetrical about its central axis for being distributed in position among sample to be tested lower surface of test specimens.
Further, each H coil unit is all made of copper wire that diameter is D length is 250 ± 1mm, width is
Continuous, uniform winding is the 1 layer line circle of l at length on the non-conductive nonmagnetic plate of 85 ± 0.2mm, between every adjacent two circle
Gapless, l=D × umber of turn, and l are less than the length of plate；Wherein, copper wire diameter D be 0.15~0.25mm, l be 180~
220mm。
Further, the spacing of H coil unit described in each adjacent two is 20~30mm.
Further, D 0.2mm, l are 200 ± 0.2mm.
Further, the primary coil winding, the secondary coil winding and all H coil units are from same
End starts winding and coiling direction is identical.
A kind of detection device for grain-oriented Si steel sheet performance detection, including ac magnetization power supply, noninductive precision are also provided
Resistor, two-way synchronized sampling measuring device and monolithic ferrometer, and the frequency meter with the ac magnetization power sources in parallel；Its
In, the monolithic magnetic conductance is calculated as monolithic ferrometer described in claim 1, each H coil unit in the monolithic ferrometer
Both ends be connected with the two-way synchronized sampling measuring device, secondary coil winding both ends and institute in the monolithic ferrometer
Two-way synchronized sampling measuring device is stated to be connected；One end of the noninductive precision resistor and one end of the ac magnetization power supply connect
It connects, the other end of the noninductive precision resistor is connect with one end of the primary coil winding in the monolithic ferrometer, described
The other end of primary coil winding is connect with the other end of the ac magnetization power supply, the both ends of the noninductive precision resistance and institute
It is in parallel to state two-way synchronized sampling measuring device.
A kind of detection method of detection device as described above, the detection method are finally also provided are as follows:
Sample to be tested is placed in monolithic ferrometer；
Measure the H coil unit induced voltage U of all H coil units in monolithic ferrometerH(t) and measurement secondary coil around
Group induced voltage U2(t)；
Calculate all H coil unit induced voltage UHThe sum of (t) mean value UH0(t), and according to digital air flux compensation
Calculate compensated secondary coil winding induced voltage U2C(t) the magnetic property parameter of the sample to be tested is calculated；
Wherein, digital air flux compensation calculates compensated secondary coil winding induced voltage
In formula:
U2CIt (t) is compensated secondary coil winding induced voltage；
U2It (t) is measurement secondary coil winding induced voltage；
U1It (t) is noninductive precision resistance RnBoth end voltage；
R is noninductive precision resistance RnResistance value；
C is penalty coefficient, the adjustment of compensation factor value be in the case where no sample to be tested when alternating current passes through just
Offset voltage is no more than the 0.1% of the non-offset voltage of test equipment secondary coil winding when grade coil windings.
Compared with prior art, beneficial effects of the present invention are as follows:
1) monolithic ferrometer of the present invention is that the examination of electrical steel strip (piece) monolithic is directly measured using H coil windings (inductance coil)
The magnetic polarization intensity of sample, it is no longer necessary to arrange effective magnetic circuit length, eliminate system brought by agreement effective magnetic circuit length and miss
Difference, the total Loss Ratio value of measurement is closer to true value；
2) measurement results such as total Loss Ratio, exciting power measured using the detection method of digital air flux compensation are obvious
Lower than the measurement result of GB/T 13789-2008 method, this method result measured directly is closer to sample true value.
Detailed description of the invention
Fig. 1 is the monolithic ferrometer cross-sectional view that the present invention is used for grain-oriented Si steel sheet performance detection；
Fig. 2 is the monolithic ferrometer Longitudinal cross section schematic that the present invention is used for grain-oriented Si steel sheet performance detection；
Fig. 3 is the structure of the detecting device schematic diagram that the present invention is used for grain-oriented Si steel sheet performance detection.
Wherein: U-shaped upper magnet yoke 1, U-shaped lower yoke 2, secondary coil winding 3, primary coil winding 4, sample to be tested 5, support
Plate 6, H coil unit 7, ac magnetization power supply 8, frequency meter 9, noninductive precision resistor 10, two-way synchronized sampling measuring device 11.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in further detail for specific embodiment and comparative example, convenient for becoming apparent from
Ground understand the present invention, but they limiting the invention.
Monolithic ferrometer as shown in Figure 1 and Figure 2 for grain-oriented Si steel sheet performance detection, including it is U-shaped upper magnet yoke 1, U-shaped
Lower yoke 2, primary coil winding 4, secondary coil winding 3, H coil windings and support plate 6.Wherein, U-shaped upper magnet yoke 1 with it is U-shaped under
2 size of magnetic yoke is identical, and U-shaped upper magnet yoke 1 and U-shaped lower yoke 2 are arranged symmetrically and are combined to form a closed yoke, and support plate 6
In the inside of closed yoke；Secondary coil winding 3 is located at 4 inside of primary coil winding and is arranged in support plate 6, to be tested
Sample 5 is placed in support plate 6 and is located among secondary coil winding 3；H coil windings are located at 5 lower surface middle part of sample to be tested
The lower section of position, for detecting the magnetic field strength on 5 surface of sample to be tested.
Because monolithic sample to be tested is having a size of 500mm × 500mm, due to the homogeneity question of sample to be tested performance itself, i.e. H
The design of coil windings should cover the area of entire sample to be tested as much as possible, but H coil windings are excessive, coiling is overstocked, and meeting
Bring the problem that H coil windings distribution capacity is excessive, measurement result is higher.Therefore, in monolithic ferrometer of the invention H coil around
Group includes 3~5 (being preferably 4 in the present embodiment) equal in magnitude and equidistantly distributed H coil units 7, each adjacent two H
The spacing of coil unit 7 is 20~30mm, and arranged in series, substantially symmetrical about its central axis point along sample to be tested 5 of all H coil units 7
The lower section at cloth position among sample to be tested lower surface.In addition, primary coil winding 4, secondary coil winding 3 and all H coils
Unit 7 is wound since the same end and coiling direction is identical.
Since the size of sample to be tested 5 is 500mm × 500mm, it is D's that each H coil unit 7, which is all made of diameter,
Copper wire is length is 250 ± 1mm, width is 85 ± 0.2mm, with a thickness of connecting on the non-conductive nonmagnetic plate of 1 ± 0.1mm
Continue, is uniform, being closely wound into the 1 layer line circle that length is l, l=D × umber of turn, and l is less than the length of plate.Because coil around
Group wire resistor is inversely proportional with copper wire diameter D, but the distribution capacity between coil windings is directly proportional to copper wire diameter D, in addition H coil
Induced voltage is that itself is very faint, therefore, in order to reduce the distribution capacity and excess loss power of wire resistor as far as possible, it is necessary to close
Reason configuration copper wire diameter D and umber of turn, i.e., in the present embodiment, copper wire diameter D is 0.15~0.25mm (preferably 0.2mm), and l is
180~220mm (preferably 200 ± 0.2mm).
Sample to be tested and U-shaped upper magnet yoke 1 and U-shaped lower yoke 2 constitute closed field circuit, and the cross section of closed yoke
Product is much larger than the cross-sectional area of sample to be tested 5, by the coil-induced voltage U of average H for measuring H coil windingsH(t) magnetic is obtained
Field intensity, then pass through the measurement secondary coil winding induced voltage U of secondary coil winding2(t) obtaining magnetic flux density can measure
The magnetic characteristic of sample to be tested.
Monolithic ferrometer of the present invention is directly to measure electrical steel strip (piece) monolithic sample using H coil windings (inductance coil)
Magnetic polarization intensity, it is no longer necessary to arrange effective magnetic circuit length, eliminate agreement effective magnetic circuit length brought by systematic error,
The total Loss Ratio value of measurement is closer to true value.
It is illustrated in figure 3 the detection device for grain-oriented Si steel sheet performance detection, including ac magnetization power supply 8, noninductive essence
Close resistor 10, two-way synchronized sampling measuring device 11 and monolithic ferrometer, and the frequency meter in parallel with ac magnetization power supply 8
9；Wherein, monolithic magnetic conductance is calculated as above-mentioned monolithic ferrometer, and details are not described herein, and ac magnetization power supply 8 is used to be monolithic magnetic conductance
Meter power supply.One end of noninductive precision resistor 10 is connect with one end of ac magnetization power supply 8, noninductive precision resistor 10 it is another
End is connect with one end of the primary coil winding 4 in monolithic ferrometer, the other end and ac magnetization power supply of primary coil winding 4
8 other end connection；The both ends of each H coil unit 7 in monolithic ferrometer with 11 phase of two-way synchronized sampling measuring device
Even, 3 both ends of secondary coil winding in monolithic ferrometer are connected with two-way synchronized sampling measuring device 11, noninductive precision resistance 10
Both ends it is also in parallel with two-way synchronized sampling measuring device 11, i.e. two-way synchronized sampling measuring device is for measuring monolithic ferrometer
In all H coil units H coil unit induced voltage UHThe sum of (t) mean value UH0(t) (electricity of each H coil unit is measured
Pressure, then with regard to average value), the measurement secondary coil winding induced voltage U of secondary coil winding 52(t) and noninductive precision resistance two
The voltage U at end1(t), and all H coil unit induced voltage U are calculatedHThe sum of (t) mean value UH0(t).H coil windings are because being obtained
The signal taken, must be using low-noise amplifier and the reproducibility for inhibiting various noises that can just be got well usually in millivolt level.It uses
One pure DC power supply is powered to preamplifier, can protect it from the interference of industrial frequency noise.
When magnetizing sample to be tested, because the air field in coil can equally be magnetized, this can bring additional power loss,
Cause sample to be tested that higher illusion is lost, therefore, it is necessary to which the influence to air-gap flux compensates.Currently generally pass through mutual inductance
Coil realizes that still, the interwinding capacity coupling of mutual inductor will lead to secondary voltage and significant phase shift occurs, to make
There is corresponding error in loss measurement, it is therefore necessary to ensure that mutual inductor, which not will lead to secondary voltage, occurs significant phase shift.
Using mutual inductor, with the variation of measurement frequency, corresponding phase shift is inevitable, and on this basis, this method proposition makes
With digital air flux compensation, it is advantageous that can avoid due to use caused by mutual inductor and the phase shift of frequency dependence and
The increase of coil impedance.
Digital air flux compensation is implemented with the principle for being similar to mutual inductor:
In formula:
U2CIt (t) is compensated secondary coil winding induced voltage；
U2It (t) is measurement secondary coil winding induced voltage；
U1It (t) is noninductive precision resistance RnBoth end voltage；
R is noninductive precision resistance RnResistance value；
C is penalty coefficient, the adjustment of compensation factor value be in the case where no sample to be tested when alternating current passes through just
Offset voltage is no more than the 0.1% of the non-offset voltage of test equipment secondary coil winding when grade coil windings, that is, is no more than measurement
Secondary coil winding induced voltage U2(t) 0.1%.
The detection method of above-mentioned detection device is as follows:
Sample to be tested is placed in monolithic ferrometer；
Measure the H coil unit induced voltage U of all H coil units in monolithic ferrometerH(t) and measurement secondary coil around
Group induced voltage U2(t)；
Calculate all H coil unit induced voltage UHThe sum of (t) mean value UH0(t), and according to digital air flux compensation
Calculate compensated secondary coil winding induced voltage U2C(t) the magnetic property parameter of the sample to be tested is calculated.
Through a large number of experiments, the total Loss Ratio measured using monolithic ferrometer of the present invention, detection device, detection method, excitation
The measurement results such as power are significantly lower than the measurement result of GB/T 13789-2008 method, it is generally the case that in power frequency and magnetic polarization
The total Loss Ratio of the orientation silicon steel monolithic sample measured under the conditions of intensity 1.7T is low 5~10%, exciting power low 10~20%, this
Method result measured directly is closer to sample true value.And GB/T 13789-2008 method measurement result is obviously higher, causes
Silicon steel product grade at least reduces a trade mark, is unfavorable for silicon steel product output, user's motor or design of transformer.
Claims (7)
1. a kind of monolithic ferrometer for grain-oriented Si steel sheet performance detection, including U-shaped upper magnet yoke (1), U-shaped lower yoke (2), just
Grade coil windings (4), secondary coil winding (3), H coil windings and support plate (6)；The U-shaped upper magnet yoke (1) with it is described U-shaped
Lower yoke (2) is arranged symmetrically and is combined to form a closed yoke, and the support plate (6) is located at the inside of closed yoke；It is described
Secondary coil winding (3) is located at primary coil winding (4) inside and is arranged on the support plate (6), sample to be tested
(65) it is placed on support plate (6) and is located among secondary coil winding (3), H coil windings are located at sample to be tested (5) lower surface
The lower section at intermediate position；It is characterized by: the H coil windings include 3~5 equal in magnitude, equidistantly distributeds and series connection cloth
The H coil unit (7) set, all H coil units (7) are distributed under sample to be tested (5) along the substantially symmetrical about its central axis of sample to be tested (5)
The lower section at position among surface.
2. being used for the monolithic ferrometer of grain-oriented Si steel sheet performance detection according to claim 1, it is characterised in that: each described
H coil unit (7) is all made of copper wire that diameter is D length is 250 ± 1mm, width is the non-conductive non magnetic of 85 ± 0.2mm
Plate on continuous, uniform winding be l at length 1 layer line circle, per adjacent two circle between gapless, l=D × umber of turn,
And l is less than the length of plate；Wherein, copper wire diameter D is 0.15~0.25mm, and l is 180~220mm.
3. being used for the monolithic ferrometer of grain-oriented Si steel sheet performance detection according to claim 1, it is characterised in that: per adjacent two
The spacing of a H coil unit (7) is 20~30mm.
4. being used for the monolithic ferrometer of grain-oriented Si steel sheet performance detection according to claim 2, it is characterised in that: D is
0.2mm, l are 200 ± 0.2mm.
5. being used for the monolithic ferrometer of grain-oriented Si steel sheet performance detection according to claim 2, it is characterised in that: the primary
Coil windings (4), the secondary coil winding (3) and all H coil units (7) wind since the same end and coiling
Direction is identical.
6. a kind of detection device for grain-oriented Si steel sheet performance detection, it is characterised in that: including ac magnetization power supply (8), nothing
Feel precision resistor (10), two-way synchronized sampling measuring device (11) and monolithic ferrometer, and with the ac magnetization power supply
Frequency meter in parallel；Wherein, the monolithic magnetic conductance is calculated as monolithic ferrometer described in claim 1, in the monolithic ferrometer
The both ends of each H coil unit (7) be connected with the two-way synchronized sampling measuring device (11), in the monolithic ferrometer
Secondary coil winding (3) both ends be connected with the two-way synchronized sampling measuring device (11)；The noninductive precision resistor
(10) one end is connect with one end of the ac magnetization power supply (8), the other end of the noninductive precision resistor (10) and institute
State one end connection of the primary coil winding (4) in monolithic ferrometer, the other end of the primary coil winding (4) and the friendship
The other end connection of excitation supply (8) is flowed, the both ends of the noninductive precision resistance (10) and two-way synchronized sampling measurement fill
Set (11) parallel connection.
7. a kind of detection method of detection device as claimed in claim 6, it is characterised in that: the detection method are as follows:
Sample to be tested is placed in monolithic ferrometer；
Measure the H coil unit induced voltage U of all H coil units in monolithic ferrometerH(t) and measurement the sense of secondary coil winding
Answer voltage U2(t)；
Calculate all H coil unit induced voltage UHThe sum of (t) mean value UH0(t), it and according to digital air flux compensation calculates
Compensated secondary coil winding induced voltage U2C(t) the magnetic property parameter of the sample to be tested is calculated；
Wherein, digital air flux compensation calculates compensated secondary coil winding induced voltage
In formula:
U2CIt (t) is compensated secondary coil winding induced voltage；
U2It (t) is measurement secondary coil winding induced voltage；
U1It (t) is noninductive precision resistance RnBoth end voltage；
R is noninductive precision resistance RnResistance value；
C is penalty coefficient, the adjustment of compensation factor value be in the case where no sample to be tested when alternating current passes through primary line
Offset voltage is no more than the 0.1% of the non-offset voltage of test equipment secondary coil winding when enclosing winding.
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| CN201811544873.3A CN109541507B (en) | 2018-12-17 | 2018-12-17 | Single-sheet permeameter for detecting performance of oriented silicon steel sheet, detection device and detection method |
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Cited By (1)
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|---|---|---|---|---|
| CN110531288A (en) * | 2019-09-26 | 2019-12-03 | 武汉钢铁有限公司 | A kind of epstein frame magnetic property detection device and method |
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