CN112327224A - Non-closed magnetic circuit magnetic field induction electricity taking testing device and method - Google Patents
Non-closed magnetic circuit magnetic field induction electricity taking testing device and method Download PDFInfo
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- CN112327224A CN112327224A CN202011202405.5A CN202011202405A CN112327224A CN 112327224 A CN112327224 A CN 112327224A CN 202011202405 A CN202011202405 A CN 202011202405A CN 112327224 A CN112327224 A CN 112327224A
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- 230000006698 induction Effects 0.000 title claims abstract description 33
- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 230000005611 electricity Effects 0.000 title claims abstract description 13
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 230000005284 excitation Effects 0.000 claims description 13
- 230000033228 biological regulation Effects 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
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- 230000004907 flux Effects 0.000 description 1
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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
- G01R33/0011—Arrangements or instruments for measuring magnetic variables comprising means, e.g. flux concentrators, flux guides, for guiding or concentrating the magnetic flux, e.g. to the magnetic sensor
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Abstract
The invention provides a non-closed magnetic circuit magnetic field induction electricity taking test device and a method, the device comprises an alternating current transformer and a plurality of parallel induction electricity taking circuits, each induction electricity taking circuit comprises a current regulating circuit, an exciting coil and a non-closed magnetic core, the current regulating circuit is connected with the exciting coil in series, one end of the non-closed magnetic core is arranged in the exciting coil, the other end of the non-closed magnetic core is arranged in a secondary coil of a detected device, the secondary coil of the detected device is connected with a load of the detected device, the input end of the alternating current transformer is connected with commercial power, and the output end of the alternating current transformer is connected with the series circuit of the current regulating circuit and the exciting. The device adopts the non-closed magnetic core, the detected device is directly placed on the magnetic core and naturally falls on the device, the position is relatively fixed without deviation, the magnetic core is non-closed, and the bending consistency is not required to be very good. And meanwhile, the multi-path exciting coils are designed to be connected in parallel, so that a plurality of detected devices can be detected at one time, and the production or detection efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of batch inspection tools of magnetic field electricity taking devices, in particular to a device and a method for testing magnetic field induction electricity taking of a non-closed magnetic circuit.
Background
The traditional magnetic field electricity-taking inspection device adopts an electric current generator to lead a detected device to penetrate through a closed magnetic core on a through-flow wire connected with the electric current generator. When a plurality of devices are required to be detected, a plurality of detected devices can penetrate through the through-flow conducting wire, and the principle is that a magnetic field is generated around the through-flow conducting wire and is gathered by the magnetic core, so that a coil in the detected devices can sense induced current and provide load energy.
The similar products have the following defects: the magnetic core must be closed, need wear the coil on the magnetic core during inspection at every turn, the magnetic core is buckled many times and can is influenced the magnetic permeability, and closing point may the deviation at every turn, the magnetic field size that the reason such as contact surface size probably differs can all influence magnetic circuit, thereby the influence is got the electric effect, uniformity is not good when leading to the test, for example be that primary current 5A can let the detection device work when designing, because the magnetic core of test buckles the number of times and arouses the magnetic permeability to descend many, probably 5.5A can let the detection device work, perhaps the position is different when closed, the diameter size after the closure is different, the position difference of through-flow wire in closed magnetic core etc. all can influence operating current.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a device and a method for testing the induction power taking of a magnetic field of a non-closed magnetic circuit.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention provides a non-closed magnetic circuit magnetic field induction electricity taking testing device, which comprises an alternating current transformer and a plurality of induction electricity taking circuits connected in parallel;
every induction power circuit all includes current regulation circuit, exciting coil and non-closed magnetic core, current regulation circuit be used for with exciting coil establishes ties, the one end of non-closed magnetic core is used for arranging in exciting coil, the other end of non-closed magnetic core is used for arranging in detected device's secondary coil, detected device's secondary coil is used for being connected with detected device's load, alternating current transformer's input is used for being connected with the power supply unit, alternating current transformer's output be used for with current regulation circuit with exciting coil's series circuit connects.
Further, the current regulating circuit includes a fixed resistor connected in series with the exciting coil.
Furthermore, the current regulating circuit further comprises an adjustable resistor, and the adjustable resistor, the fixed resistor and the exciting coil are sequentially connected in series.
Further, the number of the induction power-taking circuits is not less than 10.
Further, the exciting coil is a coil with thousands of turns.
Further, the device also comprises a shell;
the alternating current transformer, the current regulating circuit, the exciting coil and the non-closed magnetic core are arranged in the exciting coil, one end of the non-closed magnetic core arranged in the secondary coil is arranged in the shell, and the other end of the non-closed magnetic core arranged in the secondary coil is arranged outside the shell.
Further, a plurality of non-closed magnetic cores are arranged on the shell in a lattice form at one end of the non-closed magnetic cores arranged in the secondary coil.
Further, the alternating current transformer transforms the commercial power into alternating current below 36V.
The invention also provides a non-closed magnetic circuit magnetic field induction electricity taking test method, which comprises the following steps:
energizing the excitation coil to generate a magnetic field on the non-closed magnetic core;
the secondary coil of the device to be detected induces a current under the influence of the magnetic field.
Further, the method also comprises the following steps:
and the current regulating circuit is adopted to regulate the magnitude of the current.
Further, in the above-mentioned case,
the excitation coil is the excitation coil;
the non-closed magnetic core is the non-closed magnetic core;
the current regulating circuit is the current regulating circuit.
Compared with the prior art, the invention has the beneficial effects that:
the magnetic field induction electricity taking testing device with the non-closed magnetic circuit adopts the non-closed magnetic core, the detected device is directly placed on the magnetic core and naturally drops on the device, the position is relatively fixed without deviation, the magnetic core is non-closed, the bending consistency is not required, and the assembly is simple. The invention adopts the multi-path induction electricity-taking circuit to be connected in parallel, thereby being capable of detecting a plurality of detected devices at one time and greatly improving the production efficiency.
Drawings
FIG. 1 is a circuit diagram of a magnetic field induction power-taking testing device for a non-closed magnetic circuit according to the present invention;
fig. 2 is a schematic structural view of the magnetic field induction power-taking testing device with a non-closed magnetic circuit according to the present invention.
In the figure: 1. a housing; 2. a non-closed magnetic core; 3. a device to be tested.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
The invention provides a magnetic field induction electricity-taking testing device with a non-closed magnetic circuit, which comprises an alternating current transformer and a plurality of parallel induction electricity-taking circuits as shown in figure 1.
Specifically, the induction power taking circuit comprises a current regulating circuit, an exciting coil and a non-closed magnetic core, wherein the current regulating circuit is connected with the exciting coil in series, one end of the non-closed magnetic core is arranged in the exciting coil, the other end of the non-closed magnetic core is arranged in a secondary coil of the detected device, and the secondary coil of the detected device is connected with a load of the detected device.
Specifically, the input end of the alternating current transformer is connected with the mains supply, and the output end of the alternating current transformer is connected with the series circuit of the current regulating circuit and the exciting coil.
The alternating current transformer transforms 220V commercial power into safe alternating current below 36V. The power of the alternating current transformer depends on the need of connecting several excitation coils, if the excitation current of the excitation coil needs 10mA, the detected device needs to connect 10 paths, the total current is 100mA, if the output voltage of the alternating current transformer selects 24V, the power is 100mA × 24V, namely 2.4W. The requirement on the type selection of the alternating-current transformer is very low, and a proper transformer is easy to select.
The current regulating circuit comprises a fixed resistor and an adjustable resistor, and the adjustable resistor, the fixed resistor and the exciting coil are sequentially connected in series. In fig. 1, R11, R12, … … R1n are fixed resistors, and R21, R22, … … R2n are adjustable resistors. The fixed resistor and the adjustable resistor are used for accurately adjusting the current of each path, the fixed resistor can limit the output current to be on-line, and the exciting coil cannot be directly connected to the output end of the transformer even if the adjustable resistor is adjusted to be 0. Because each excitation coil has tiny difference and the precision problem of the fixed resistor can cause the error of each path, the adjustable resistor is introduced to independently adjust the precision of each path, so that the output consistency of each path is higher.
The exciting coil is used for generating an exciting magnetic field, and the more the number of turns of the exciting coil is, the stronger the magnetic field intensity is, and the larger the current which can be sensed by the detected device is. In this embodiment, a thousand-order coil is selected as the excitation coil.
The non-closed magnetic core is used for gathering a magnetic field, so that the magnetic field in the exciting coil can be transmitted in the magnetic core and then passes through the secondary coil of the detected device, the coil in the detected device can induce current, and meanwhile, the non-closed magnetic core is also used for limiting the position of the detected device.
The detected device comprises two parts, one part is a secondary coil and is used for inducing a magnetic field in the non-closed magnetic core so as to induce current in the secondary coil; the other part is the load, and the current induced in the secondary coil energizes the load.
In order to improve the production efficiency, in this embodiment, the number of the induction power-taking circuits is more than 10, that is, n is greater than or equal to 10. The parallel connection mode is adopted between each path, and because the output voltage of the alternating current transformer is stable, the influence between each path is almost avoided according to the KVL kirchhoff voltage law.
As shown in fig. 2, it preferably further includes a case 1, one end of the ac transformer, the current regulating circuit, the exciting coil, and the non-closed magnetic core 2 disposed in the exciting coil is disposed in the case 1, and the other end of the non-closed magnetic core 2 is disposed outside the case 1. During testing, the end is placed in the secondary coil of the device under test 3.
Preferably, a plurality of non-closed magnetic cores 2 are arranged on the case 1 in a lattice form at one end disposed in the secondary coil.
The working principle of the device is as follows:
a magnetic field is generated around the energized excitation coil, which is mainly concentrated in the middle of the excitation coil. A magnetic material, namely a magnetic core is inserted into the middle of the exciting coil, so that a magnetic field is mainly concentrated on the magnetic core, a secondary coil is sleeved on the magnetic core, the magnetic flux changes due to the continuous change of the magnetic field on the magnetic core, current is induced in the secondary coil, and the secondary coil is connected into the detected device 3 to serve as power supply input.
The device adopts the non-closed magnetic core, the detected device is directly placed on the magnetic core and naturally falls on the device, the position is relatively fixed without deviation, the magnetic core is non-closed, the bending consistency is not required, and the assembly is simple. Meanwhile, a plurality of paths of exciting coils can be designed, so that a plurality of detected devices can be detected at one time, and the efficiency is greatly improved. And the magnetic core is exposed outside, the magnetic core is not connected with the circuit at all, and potential safety hazards do not exist in the production test process.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; those skilled in the art can readily practice the invention as shown and described in the drawings and detailed description herein; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. The magnetic field induction electricity-taking testing device for the non-closed magnetic circuit is characterized in that: comprises an alternating current transformer and a plurality of induction electricity taking circuits which are connected in parallel;
every induction power circuit all includes current regulation circuit, exciting coil and non-closed magnetic core, current regulation circuit be used for with exciting coil establishes ties, the one end of non-closed magnetic core is used for arranging in exciting coil, the other end of non-closed magnetic core is used for arranging in detected device's secondary coil, detected device's secondary coil is used for being connected with detected device's load, alternating current transformer's input is used for being connected with the power supply unit, alternating current transformer's output be used for with current regulation circuit with exciting coil's series circuit connects.
2. The non-closed magnetic circuit magnetic field induction electricity-taking testing device according to claim 1, characterized in that: the current regulating circuit includes a fixed resistor connected in series with the exciting coil.
3. The non-closed magnetic circuit magnetic field induction electricity-taking testing device according to claim 2, characterized in that: the current regulating circuit further comprises an adjustable resistor, and the adjustable resistor, the fixed resistor and the exciting coil are sequentially connected in series.
4. The non-closed magnetic circuit magnetic field induction electricity-taking testing device according to claim 1, characterized in that: the number of the induction electricity taking circuits is not less than 10.
5. The non-closed magnetic circuit magnetic field induction electricity-taking testing device according to claim 1, characterized in that: the exciting coil is a coil with thousands of turns.
6. The non-closed magnetic circuit magnetic field induction electricity-taking testing device according to claim 1, characterized in that: the device also comprises a shell;
the alternating current transformer, the current regulating circuit, the exciting coil and the non-closed magnetic core are arranged in the exciting coil, one end of the non-closed magnetic core arranged in the secondary coil is arranged in the shell, and the other end of the non-closed magnetic core arranged in the secondary coil is arranged outside the shell.
7. The non-closed magnetic circuit magnetic field induction power-taking testing device according to claim 6, characterized in that: and one ends of the plurality of non-closed magnetic cores, which are arranged in the secondary coil, are arranged on the shell in a lattice form.
8. The method for testing the induction power taking of the magnetic field of the non-closed magnetic circuit is characterized by comprising the following steps: the method comprises the following steps:
energizing the excitation coil to generate a magnetic field on the non-closed magnetic core;
the secondary coil of the device to be detected induces a current under the influence of the magnetic field.
9. The non-closed magnetic circuit magnetic field induction power-taking test method according to claim 8, characterized in that: further comprising:
and the current regulating circuit is adopted to regulate the magnitude of the current.
10. The non-closed magnetic circuit magnetic field induction power-taking test method according to claim 9, characterized in that:
the excitation coil is the excitation coil according to any one of claims 1 to 7;
the non-closed magnetic core is the non-closed magnetic core according to any one of claims 1 to 7;
the current regulating circuit is as claimed in any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011202405.5A CN112327224B (en) | 2020-11-02 | 2020-11-02 | Non-closed magnetic circuit magnetic field induction electricity acquisition testing device and method |
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| CN202011202405.5A CN112327224B (en) | 2020-11-02 | 2020-11-02 | Non-closed magnetic circuit magnetic field induction electricity acquisition testing device and method |
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| CN112327224A true CN112327224A (en) | 2021-02-05 |
| CN112327224B CN112327224B (en) | 2024-02-13 |
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Citations (7)
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| CN105807117A (en) * | 2014-12-29 | 2016-07-27 | 苏州普源精电科技有限公司 | Current sensing circuit for current measuring probe and current measuring probe |
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-
2020
- 2020-11-02 CN CN202011202405.5A patent/CN112327224B/en active Active
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| CN105807117A (en) * | 2014-12-29 | 2016-07-27 | 苏州普源精电科技有限公司 | Current sensing circuit for current measuring probe and current measuring probe |
| CN106950441A (en) * | 2017-02-15 | 2017-07-14 | 西安交通大学 | A kind of sensor for on-line checking transformer DC magnetic bias |
| CN107167515A (en) * | 2017-07-18 | 2017-09-15 | 中国石油化工股份有限公司 | A kind of control method of quick constant current |
| CN107576425A (en) * | 2017-08-25 | 2018-01-12 | 北京科技大学 | A kind of device and method of non-contact measurement ferromagnetic material stress |
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