CN201876536U - Adjustable-magnetic-circuit measurement device for two-dimensional magnetic property of electrical sheets - Google Patents
Adjustable-magnetic-circuit measurement device for two-dimensional magnetic property of electrical sheets Download PDFInfo
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- CN201876536U CN201876536U CN2010206180626U CN201020618062U CN201876536U CN 201876536 U CN201876536 U CN 201876536U CN 2010206180626 U CN2010206180626 U CN 2010206180626U CN 201020618062 U CN201020618062 U CN 201020618062U CN 201876536 U CN201876536 U CN 201876536U
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Abstract
The utility model relates to an adjustable-magnetic-circuit measurement device for two-dimensional magnetic property of electrical sheets. Double exciting coils are adopted in the measurement device to form a magnetic circuit which provides a direction adjustable magnetic field in a sample area of an electrical sheet to be measured. The sample of the electrical sheet to be measured is positioned in an environment with the rotary magnetic field by means of closed loop control strategy of adjusting exciting voltage waveform of the exciting coils. Due to the magnetic circuit structure with size-adjustable air gap, the magnetic field of the sample to be measured can steel be the rotary magnetic field even when the magnetic circuit is saturated. The measurement device can complete two-dimensional magnetic property measurement for the electrical sheet under rotary magnetic flow, thereby reflecting anisotropism of the electrical sheet in rotary magnetic field.
Description
Technical field:
The utility model relates generally to a kind of two-dimensional magnetic property of electrical steel sheet measurement mechanism, particularly relates to the measurement mechanism of the adjustable two-dimensional magnetic property of electrical steel sheet of a kind of magnetic circuit, belongs to the Magnetic Measurement technical field.
Background technology:
The magnetic characteristic of electrical sheet can be divided into static magnetic characteristic and dynamic magnetic characteristic.The dynamic magnetic characteristic is divided into ac magnetization again, has the ac magnetization of DC magnetic biasing, exchanges and exchanges superposed magnetization, impulse magnetization.The utility model is mainly studied ac magnetization.
The traditional measurement device and method of electrical sheet ac magnetization characteristic has two kinds: like Persian Tan Fangquan method and annular exemplar mensuration, they are own through the history of decades has been arranged.What the ferromagnetic material measurement standard of China mainly adopted at present is to like Persian Tan Fangquan method.In these two kinds of measuring methods, ignored the phase relation between magnetic flux density and the magnetic field intensity, only, think that roughly magnetic field intensity and magnetic induction density are in the same way in make progress excitation and measuring of folk prescription.The magnetic characteristic that this traditional measurement mechanism and method can only be measured a direction of electrical sheet is merely considered the one dimension magnetic characteristic of electrical sheet, and the magnetic characteristic of describing electrical sheet like this is far from being enough.
As everyone knows, electrical sheet is widely used as the core material of all kinds of motors, transformer, exists local rotating magnetic field in the T of electric machine iron core and transformer core shape joint portion, determines in the iron core that promptly the size and Orientation of the magnetic flux density of point is all changing.Magnetic flux density under the rotary magnetization situation in this class anisotropic material is different with the direction of magnetic field intensity, need to adopt special apparatus and method to carry out the measurement of electrical sheet magnetic characteristic, reflect the anisotropy of electrical sheet under the rotary magnetization situation preferably.In the utility model traditional folk prescription is called the one dimension magnetic characteristic to the measuring method of excitation and measures, accordingly, the measuring method of this energy measurement rotary magnetization characteristic is called two-dimensional magnetic property measures.
Magnetization curve that China electrical sheet manufacturing enterprise provides and damage curve still adopt folk prescription to draw to excitation, also rest on one dimension magnetic characteristic measuring phases.In recent years, the two-dimensional magnetic property Research on Measuring Technology has caused domestic researchist's concern, and Device for measuring is at the early-stage, is in the laboratory study stage.
The utility model content:
1, utility model purpose:
The utility model provides a kind of magnetic circuit adjustable two-dimensional magnetic property of electrical steel sheet measurement mechanism, its objective is in order to overcome the traditional measurement device and can only measure the defective of the magnetic characteristic of a direction of electrical sheet, the anisotropy that can reflect electrical sheet under the rotary magnetization situation is preferably comprehensively described the magnetic characteristic of electrical sheet.
2, technical scheme:
The utility model is achieved through the following technical solutions:
The adjustable two-dimensional magnetic property of electrical steel sheet measurement mechanism of a kind of magnetic circuit comprises computer unit, data acquisition unit, low-pass filter unit, power amplification unit, main magnetic circuit unit, detecting signal unit, isolation amplifying unit.It is characterized in that described main magnetic circuit unit is two magnetic excitation circuit, comprises a pair of x direction field coil and a pair of y direction field coil, provides exciting current by power amplification unit to it; Have a pair of x direction rectangular parallelepiped iron core on the described a pair of x direction field coil, have a pair of y direction rectangular parallelepiped iron core on the described a pair of y direction field coil; Four iron yoke and described x direction rectangular parallelepiped sides unshakable in one's determination and y direction rectangular parallelepiped iron core that have fillet are close together, and form magnetic loop; Tested electrical sheet print is placed on the central area of described main magnetic circuit, and has certain interval between described x direction rectangular parallelepiped iron core and the y direction rectangular parallelepiped iron core; Described electrical sheet print central area dashes equidistantly four small sircle holes; Described detecting signal unit comprises two magnetic flux density detecting coils and two magnetic field intensity detecting coils.
Described x direction rectangular parallelepiped iron core can move left and right, in order to adjust the air gap between described print and the x direction rectangular parallelepiped iron core, improves the convergence of saturated back, main magnetic circuit magnetic field controlling schemes.
Described y direction rectangular parallelepiped iron core can move up and down, and in order to adjust the air gap between described print and the y direction rectangular parallelepiped iron core, improves the convergence of saturated back, main magnetic circuit magnetic field controlling schemes.
Described two magnetic flux density detecting coils are wrapped on the small sircle hole of electrical sheet print with the single turn fine copper wire orthogonally.
Described two magnetic field intensity detecting coils are wrapped on the template skeleton of being made by non-magnetic conduction insulating material with the multiturn fine copper wire orthogonally, are close to electrical sheet print lower surface and place.
Described iron yoke is formed by the folded system of low-loss grain-oriented electric steel sheet.
The adjustable two-dimensional magnetic property of electrical steel sheet measuring method of a kind of magnetic circuit is characterized in that: carry out according to the following steps:
(1) exports the two-way sine voltage signal based on the computer program of Virtual instrument LabVIEW, power to the x of main magnetic circuit direction field coil, y direction field coil excitation by port D and E respectively through data acquisition unit and two-way power amplification unit, in the electrical sheet print, produce the cycle variation magnetic field;
(2) the magnetic flux density detecting coil collects x direction and y direction inductor voltage waveform, passes to the isolation amplifying unit by port F and G respectively, through data acquisition unit induction voltage waveform is fed back to computing machine;
(3) induction voltage waveform of computer-controlled program utilization input calculates magnetic flux density waveform in the current electrical sheet print, and itself and expectation waveform are compared two-way field voltage signal behind the output calibration;
(4) repeat said process, be the rotating magnetic flux track of expectation up to electrical sheet print magnetic field of living in, gather magnetic field intensity detecting coil signal this moment, obtains the waveform of corresponding magnetic field intensity, and then finish two-dimensional magnetic property of electrical steel sheet and measure.
3, advantage and effect:
The beneficial effects of the utility model are as follows:
Adopt x, y both direction field coil to constitute main magnetic circuit, the magnetic field environment of direction-agile can be provided in tested print region; Adopt the closed-loop control strategy of adjusting the field voltage waveform, realize that magnetic field, tested print central area is rotating magnetic flux; Adopt the adjustable magnetic structure of size of gaps, guaranteed the still controlled rotating magnetic flux that is made as in magnetic circuit print magnetic field of living in, saturated back; Adopt the Virtual instrument LabVIEW program, make measuring method be more convenient for realizing.
Description of drawings:
Fig. 1 is the utility model measurement mechanism main magnetic circuit vertical view;
Fig. 2 is the utility model measurement mechanism main magnetic circuit side view;
Fig. 3 is the utility model measurement mechanism magnetic flux density detecting coil structural representation;
Fig. 4 is the utility model measurement mechanism magnetic field intensity detecting coil structural representation;
Fig. 5 is the utility model measurement mechanism structural representation.
Annex 1 is the utility model LabVIEW measurement result figure.
Description of reference numerals:
Fig. 1 is in Fig. 4: 1, x direction field coil; 2, y direction field coil; 3, y direction rectangular parallelepiped iron core; 4, iron yoke; 5, electrical sheet print; 6, circular hole; 7, magnetic flux density detecting coil; 8, magnetic field intensity detecting coil; 9, x direction rectangular parallelepiped iron core; X, y, z are direction.
Embodiment:
Below in conjunction with accompanying drawing the utility model is described further:
The adjustable two-dimensional magnetic property of electrical steel sheet measurement mechanism of a kind of magnetic circuit, as shown in Figure 5, comprise computer unit, data acquisition unit, low-pass filter unit, power amplification unit, the main magnetic circuit unit, detecting signal unit, isolate amplifying unit, be provided with data acquisition unit between computer unit and the low-pass filter unit, low-pass filter unit is connected to the main magnetic circuit unit by the two-way power amplification unit, detecting signal unit feeds back to data acquisition unit by isolating amplifying unit, it is characterized in that, described main magnetic circuit unit is two magnetic excitation circuit, as shown in fig. 1, comprise a pair of x direction field coil 1 and a pair of y direction field coil 2, provide exciting current by described power amplification unit; Described a pair of x direction field coil 1 has a pair of x direction rectangular parallelepiped iron core 9, and described a pair of y direction field coil 2 has a pair of y direction rectangular parallelepiped iron core 3; Four iron yokes that have a fillet 4 are close together with the side of described x direction rectangular parallelepiped unshakable in one's determination 9 and y direction rectangular parallelepiped iron core 3, form magnetic loop; Tested electrical sheet print 5 is placed on the central area of described main magnetic circuit, and has certain interval between described x direction rectangular parallelepiped unshakable in one's determination 9 and the y direction rectangular parallelepiped iron core 3; As shown in Fig. 2 and Fig. 3, described electrical sheet print 5 central areas dash equidistantly four small sircle holes 6; Described detecting signal unit comprises two magnetic flux density detecting coils 7 and two magnetic field intensity detecting coils 8.
Described a pair of x direction rectangular parallelepiped iron core 9 can move left and right, in order to adjust the air gap between described print 5 and the x direction rectangular parallelepiped iron core 9, improves the convergence of saturated back, described main magnetic circuit magnetic field controlling schemes.
Described a pair of y direction rectangular parallelepiped iron core 3 can move up and down, and in order to adjust the air gap between described print 5 and the y direction rectangular parallelepiped iron core 3, improves the convergence of saturated back, described main magnetic circuit magnetic field controlling schemes.
As shown in Figure 3, described two magnetic flux density detecting coils, 7 usefulness single turn fine copper wires are wrapped on the small sircle hole 6 of described print 5 orthogonally.
As shown in Fig. 2 and Fig. 4, described two magnetic field intensity detecting coils, 8 usefulness multiturn fine copper wires are wrapped on the template skeleton of being made by non-magnetic conduction insulating material orthogonally, are close to described print 5 lower surfaces and place.
Described iron yoke 4 is formed by the folded system of low-loss grain-oriented electric steel sheet.
As shown in Figure 5, the adjustable two-dimensional magnetic property of electrical steel sheet measuring method of a kind of magnetic circuit, carry out according to the following steps:
(1) exports the two-way sine voltage signal based on the computer program of Virtual instrument LabVIEW, power to the x of main magnetic circuit direction field coil 1, y direction field coil 2 excitations by port D and E respectively through data acquisition unit and two-way power amplification unit, in electrical sheet print 5, produce the cycle variation magnetic field;
(2) magnetic flux density detecting coil 7 collects x direction and y direction inductor voltage waveform, passes to the isolation amplifying unit by port F and G respectively, through data acquisition unit induction voltage waveform is fed back to computing machine;
(3) induction voltage waveform of computer-controlled program utilization input calculates magnetic flux density waveform in the current print, and itself and expectation waveform are compared two-way field voltage signal behind the output calibration;
(4) repeating said process, is the rotating magnetic flux track up to electrical sheet print 5 magnetic fields of living in, and gather magnetic field intensity detecting coil 8 signals this moment, obtains the waveform of corresponding magnetic field intensity, and then finishes two-dimensional magnetic property of electrical steel sheet and measure.
As shown in annex 1,, provided the two-dimensional magnetic property measurement result interface that utilizes the program composition of LabVIEW virtual instrument as embodiment of the utility model.The interface shows waveform, controlled magnetic flux density waveform and the waveform error curve of field voltage on two excitation direction in real time.
The utility model provides a kind of magnetic circuit adjustable two-dimensional magnetic property of electrical steel sheet measurement mechanism, this device adopts two magnetic excitation circuit and Closed loop Control to guarantee that tested electrical sheet regional magnetic field is a rotating magnetic field, and measure corresponding magnetic field intensity, finish the surveying work of two-dimensional magnetic property of electrical steel sheet under the rotating magnetic flux.Utilize device of the present utility model can measure grain orientation and crystal grain non-oriented electrical steel sheet two-dimensional magnetic property, utilize measuring method of the present utility model can reflect the anisotropy of electrical sheet under the rotary magnetization situation preferably.
Claims (6)
1. adjustable two-dimensional magnetic property of electrical steel sheet measurement mechanism of magnetic circuit, comprise computer unit, data acquisition unit, low-pass filter unit, power amplification unit, main magnetic circuit unit, detecting signal unit, isolation amplifying unit, it is characterized in that: described main magnetic circuit unit is two magnetic excitation circuit, comprise a pair of x direction field coil (1) and a pair of y direction field coil (2), provide exciting current to it by power amplification unit; Have x direction rectangular parallelepiped iron core (9) on the described x direction field coil (1), have y direction rectangular parallelepiped iron core (3) on the described y direction field coil (2); Four iron yokes (4) that have a fillet are close together the composition magnetic loop with the side of described x direction rectangular parallelepiped iron core (9) and y direction rectangular parallelepiped iron core (3); Tested electrical sheet print (5) is placed on the central area of described main magnetic circuit, and has certain interval between described x direction rectangular parallelepiped iron core (9) and the y direction rectangular parallelepiped iron core (3); Described electrical sheet print (5) central area dashes equidistantly four small sircle holes (6); Described detecting signal unit comprises two magnetic flux density detecting coils (7) and two magnetic field intensity detecting coils (8).
2. the adjustable two-dimensional magnetic property of electrical steel sheet measurement mechanism of a kind of magnetic circuit according to claim 1 is characterized in that: described x direction rectangular parallelepiped iron core (9) can move left and right.
3. the adjustable two-dimensional magnetic property of electrical steel sheet measurement mechanism of a kind of magnetic circuit according to claim 1 is characterized in that: described y direction rectangular parallelepiped iron core (3) can move up and down.
4. the adjustable two-dimensional magnetic property of electrical steel sheet measurement mechanism of a kind of magnetic circuit according to claim 1 is characterized in that: described two magnetic flux density detecting coils (7) are wrapped on the small sircle hole (6) of electrical sheet print (5) with the single turn fine copper wire orthogonally.
5. the adjustable two-dimensional magnetic property of electrical steel sheet measurement mechanism of a kind of magnetic circuit according to claim 1, it is characterized in that: described two magnetic field intensity detecting coils (8) are wrapped on the template skeleton of being made by non-magnetic conduction insulating material with the multiturn fine copper wire orthogonally, are close to electrical sheet print (5) lower surface and place.
6. the adjustable two-dimensional magnetic property of electrical steel sheet measurement mechanism of a kind of magnetic circuit according to claim 1 is characterized in that: described iron yoke (4) is formed by the folded system of low-loss grain-oriented electric steel sheet.
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| CN2010206180626U CN201876536U (en) | 2010-11-22 | 2010-11-22 | Adjustable-magnetic-circuit measurement device for two-dimensional magnetic property of electrical sheets |
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| CN2010206180626U CN201876536U (en) | 2010-11-22 | 2010-11-22 | Adjustable-magnetic-circuit measurement device for two-dimensional magnetic property of electrical sheets |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103194A (en) * | 2010-11-22 | 2011-06-22 | 沈阳工业大学 | Device and method for measuring two-dimensional magnetic properties of electric steel sheet with adjustable magnetic circuit |
| CN102419425A (en) * | 2011-09-09 | 2012-04-18 | 兰州大学 | Magnetoresistance automatic measuring device and measuring method for the same |
| CN105339803A (en) * | 2013-05-08 | 2016-02-17 | 海德堡离子射线治疗(Hit)海德堡大学综合诊所企业有限公司 | Device for measuring and closed-loop control of magnetic field generated by electromagnet |
| CN106959425A (en) * | 2016-01-11 | 2017-07-18 | 国网智能电网研究院 | A kind of electrical sheet total Loss Ratio measuring method under D.C. magnetic biasing operating mode |
| CN108594144A (en) * | 2018-06-27 | 2018-09-28 | 河北工业大学 | Two-dimentional monolithic magnetic characteristic under biaxial stress loading environment tests system and method |
| CN115308493A (en) * | 2022-07-11 | 2022-11-08 | 浙江大学 | Electrical steel iron core loss test method |
| AT525785A2 (en) * | 2022-01-07 | 2023-07-15 | Helmut Pfuetzner Dr | Single sheet tester with booster magnetization |
-
2010
- 2010-11-22 CN CN2010206180626U patent/CN201876536U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102103194A (en) * | 2010-11-22 | 2011-06-22 | 沈阳工业大学 | Device and method for measuring two-dimensional magnetic properties of electric steel sheet with adjustable magnetic circuit |
| CN102419425A (en) * | 2011-09-09 | 2012-04-18 | 兰州大学 | Magnetoresistance automatic measuring device and measuring method for the same |
| CN105339803A (en) * | 2013-05-08 | 2016-02-17 | 海德堡离子射线治疗(Hit)海德堡大学综合诊所企业有限公司 | Device for measuring and closed-loop control of magnetic field generated by electromagnet |
| CN106959425A (en) * | 2016-01-11 | 2017-07-18 | 国网智能电网研究院 | A kind of electrical sheet total Loss Ratio measuring method under D.C. magnetic biasing operating mode |
| CN108594144A (en) * | 2018-06-27 | 2018-09-28 | 河北工业大学 | Two-dimentional monolithic magnetic characteristic under biaxial stress loading environment tests system and method |
| CN108594144B (en) * | 2018-06-27 | 2024-01-19 | 河北工业大学 | Two-dimensional monolithic magnetic characteristic test system and method under bidirectional stress loading condition |
| AT525785A2 (en) * | 2022-01-07 | 2023-07-15 | Helmut Pfuetzner Dr | Single sheet tester with booster magnetization |
| CN115308493A (en) * | 2022-07-11 | 2022-11-08 | 浙江大学 | Electrical steel iron core loss test method |
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