CN112327224B - Non-closed magnetic circuit magnetic field induction electricity acquisition testing device and method - Google Patents
Non-closed magnetic circuit magnetic field induction electricity acquisition testing device and method Download PDFInfo
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- CN112327224B CN112327224B CN202011202405.5A CN202011202405A CN112327224B CN 112327224 B CN112327224 B CN 112327224B CN 202011202405 A CN202011202405 A CN 202011202405A CN 112327224 B CN112327224 B CN 112327224B
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- 230000006698 induction Effects 0.000 title claims abstract description 32
- 238000012360 testing method Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000005611 electricity Effects 0.000 title claims description 10
- 230000001105 regulatory effect Effects 0.000 claims abstract description 22
- 238000005259 measurement Methods 0.000 claims description 4
- 230000005284 excitation Effects 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims 2
- 238000005452 bending Methods 0.000 abstract description 5
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- 238000001514 detection method Methods 0.000 abstract description 4
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- 230000035699 permeability Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
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- 239000000696 magnetic material Substances 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, wherein 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 tested device, the secondary coil of the tested device is connected with a load of the tested device, the input end of the alternating current transformer is connected with 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 invention adopts the non-closed magnetic core, directly places the detected device on the magnetic core, naturally drops on the device, does not deviate when the position is relatively fixed, and has good consistency without bending because the magnetic core is non-closed. Meanwhile, the multipath 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 non-closed magnetic circuit magnetic field induction electricity taking test device and method.
Background
The traditional magnetic field electricity taking and checking device adopts a current generator to pass a detected device through a closed magnetic core on a through-current guide wire connected with the current generator. When a plurality of devices are to be detected, a plurality of devices to be detected can be penetrated on the through-current lead, and the principle is that a magnetic field is generated around the through-current lead and is gathered by the magnetic core, so that a coil in the devices to be detected can induce induced current to provide load energy.
The similar products have the following defects: the magnetic core must be closed, need wear the coil on the magnetic core when examining every time, the magnetic core is buckled many times and can influence magnetic permeability, and the closing point at every turn probably has the deviation, and the contact surface size can all influence the magnetic field size of magnetic circuit for the same reason probably, thereby influence and get the electric effect, the uniformity is not good when leading to the test, for example the design is that primary current 5A can let by detection device work, because the magnetic core bending number of times of test causes the magnetic permeability decline, can let by detection device work perhaps 5.5A, or the position is different when closed, diameter size after the closure is different, the position difference of through-flow wire in the closed magnetic core can all influence operating current.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a non-closed magnetic circuit magnetic field induction electricity sampling testing device and a method, wherein a non-closed magnetic core is adopted, a tested device is directly placed on the magnetic core and naturally falls onto the device, the position is relatively fixed and cannot deviate, the magnetic core is non-closed, bending consistency is not required, the assembly is simple, and meanwhile, multiple exciting coils can be designed, so that a plurality of tested devices can be tested at one time, and the production efficiency is greatly improved.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides a non-closed magnetic circuit magnetic field induction power acquisition testing device, which comprises an alternating current transformer and a plurality of induction power acquisition circuits connected in parallel;
each path of induction power taking circuit comprises a current regulating circuit, an exciting coil and a non-closed magnetic core, wherein the current regulating circuit is used for being connected with the exciting coil in series, one end of the non-closed magnetic core is used for being arranged in the exciting coil, the other end of the non-closed magnetic core is used for being arranged in a secondary coil of a detected device, the secondary coil of the detected device is used for being connected with a load of the detected device, the input end of an alternating current transformer is used for being connected with a power supply unit, and the output end of the alternating current transformer is used for being connected with a series circuit of the current regulating circuit and the exciting coil.
Further, the current regulating circuit comprises a fixed resistor, and the fixed resistor is connected with the exciting coil in series.
Further, the current adjusting 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 one end of the non-closed magnetic core, which is arranged in the exciting coil, are arranged in the shell, and one end of the non-closed magnetic core, which is arranged in the secondary coil, is arranged outside the shell.
Further, one end of the non-closed magnetic cores, which are arranged in the secondary coil, is arranged on the shell in a lattice mode.
Further, the alternating current transformer transforms the commercial power into alternating current of 36V or less.
The invention also provides a non-closed magnetic circuit magnetic field induction electricity acquisition method, which comprises the following steps:
energizing the exciting coil, and generating a magnetic field on the non-closed magnetic core;
the secondary coil of the detected device induces a current under the influence of the magnetic field.
Further, the method further comprises the following steps:
and a current regulating circuit is adopted to regulate the current.
Further, the method comprises the steps of,
the exciting coil is the exciting 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 non-closed magnetic circuit magnetic field induction electricity sampling testing 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, no deviation is generated, the magnetic core is non-closed, the bending consistency is not required, and the assembly is simple. The invention adopts the parallel connection of the multi-channel induction power taking circuits, thereby detecting a plurality of detected devices at one time and greatly improving the production efficiency.
Drawings
FIG. 1 is a circuit diagram of a non-closed magnetic circuit magnetic field induction power measurement device of the invention;
fig. 2 is a schematic structural diagram of a non-closed magnetic circuit magnetic field induction electric measurement device according to the present invention.
In the figure: 1. a housing; 2. a non-closed magnetic core; 3. a device to be detected.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
The invention provides a non-closed magnetic circuit magnetic field induction electricity-taking testing device, which is shown in figure 1 and comprises an alternating current transformer and a plurality of parallel induction electricity-taking circuits.
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 a 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 that a plurality of exciting coils are needed to be connected, for example, the exciting current of the exciting coils needs 10mA, the detected device needs 10 paths, the total current is 100mA, for example, the output voltage of the alternating current transformer is 24V, and the power is 100mA by 24V, namely 2.4W. The choice of ac transformers is very low and suitable transformers can be easily selected.
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 even if the adjustable resistor is adjusted to 0, the exciting coil cannot be directly connected to the output end of the transformer. Because each exciting coil has tiny difference and the precision problem of the fixed resistor can cause each path to have errors, 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, the same input current is adopted, the more the number of turns is, the stronger the magnetic field intensity is, and the larger the current which can be sensed by the detection device is. In this embodiment, a coil with thousands of turns is selected as the exciting coil.
The non-closed magnetic core is used for gathering 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, so that the coil in the detected device can induce current, and 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 that current is induced in the secondary coil; the other part is the load, and the current induced in the secondary coil provides energy for the load.
In order to improve production efficiency, in the embodiment, the number of the induction power taking circuits is more than 10, namely n is more than or equal to 10. The parallel connection mode is adopted between each two paths, and the output voltage of the alternating current transformer is stable, so that the influence between each two paths is almost avoided according to the KVL kirchhoff voltage law.
As shown in fig. 2, the transformer also preferably comprises a shell 1, wherein an alternating-current transformer, a current regulating circuit, an exciting coil and one end of the non-closed magnetic core 2, which is arranged in the exciting coil, are arranged in the shell 1, and the other end of the non-closed magnetic core 2 is arranged outside the shell 1. In the test, 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 in a lattice form on the housing 1 at one end thereof disposed in the secondary coil.
The working principle of the device of the invention is as follows:
the magnetic field is generated around the energized excitation coil, and is mainly concentrated in the middle of the excitation coil. A magnetic material, namely a magnetic core, is inserted in the middle of the exciting coil, the magnetic field is mainly concentrated on the magnetic core, a secondary coil is sleeved on the magnetic core, the magnetic field on the magnetic core is continuously changed to cause magnetic flux change, 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 invention adopts the non-closed magnetic core, directly places the detected device on the magnetic core, naturally drops on the device, does not deviate when the position is relatively fixed, has the advantages of non-closed magnetic core, no need of bending, good consistency and simple assembly. Meanwhile, a plurality 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 only the magnetic core is exposed, the magnetic core is not connected with the circuit, and potential safety hazards are not generated in the production test process.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; those skilled in the art can smoothly practice the invention as shown in the drawings and described above; however, those skilled in the art will appreciate that many modifications, adaptations, and variations of the present invention are possible in light of the above teachings without departing from the scope of the invention; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present invention still fall within the scope of the present invention.
Claims (8)
1. Non-closed magnetic circuit magnetic field induction electricity taking testing device, its characterized in that: the induction power-taking circuit comprises an alternating current transformer and a plurality of circuits of induction power-taking circuits which are connected in parallel;
each path of induction power taking circuit comprises a current regulating circuit, an exciting coil and a non-closed magnetic core, wherein the current regulating circuit is used for being connected with the exciting coil in series, one end of the non-closed magnetic core is used for being arranged in the exciting coil, the other end of the non-closed magnetic core is used for being arranged in a secondary coil of a detected device, the secondary coil of the detected device is used for being connected with a load of the detected device, the input end of an alternating current transformer is used for being connected with a power supply unit, and the output end of the alternating current transformer is used for being connected with a series circuit of the current regulating circuit and the exciting coil;
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.
2. The non-closed magnetic circuit magnetic field induction power acquisition testing device according to claim 1, wherein: the number of the induction power taking circuits is not less than 10.
3. The non-closed magnetic circuit magnetic field induction power acquisition testing device according to claim 1, wherein: the exciting coil is a coil with thousands of turns.
4. The non-closed magnetic circuit magnetic field induction power acquisition testing device according to claim 1, wherein: also comprises a shell;
the alternating current transformer, the current regulating circuit, the exciting coil and one end of the non-closed magnetic core, which is arranged in the exciting coil, are arranged in the shell, and one end of the non-closed magnetic core, which is arranged in the secondary coil, is arranged outside the shell.
5. The non-closed magnetic circuit magnetic field induction power acquisition testing device according to claim 4, wherein: one end of the non-closed magnetic cores, which are arranged in the secondary coil, is arranged on the shell in a lattice mode.
6. The non-closed magnetic circuit magnetic field induction electricity acquisition method is characterized in that: comprising the following steps:
energizing the excitation coil to generate a magnetic field on the non-closed magnetic core; the exciting coil is the exciting coil according to any one of claims 1 to 5; the non-closed magnetic core is the non-closed magnetic core according to any one of claims 1 to 5;
the secondary coil of the detected device induces a current under the influence of the magnetic field.
7. The method for non-closed magnetic circuit magnetic field induction electric measurement according to claim 6, wherein: further comprises:
and a current regulating circuit is adopted to regulate the current.
8. The method for non-closed magnetic circuit magnetic field induction electric measurement according to claim 7, wherein:
the current regulation circuit is the current regulation circuit according to any one of claims 1 to 5.
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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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