CN109100594A - A kind of adjustable damped oscillation magnetic field experimental rig of intensity - Google Patents
A kind of adjustable damped oscillation magnetic field experimental rig of intensity Download PDFInfo
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- CN109100594A CN109100594A CN201810983024.1A CN201810983024A CN109100594A CN 109100594 A CN109100594 A CN 109100594A CN 201810983024 A CN201810983024 A CN 201810983024A CN 109100594 A CN109100594 A CN 109100594A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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Abstract
The present invention relates to a kind of adjustable damped oscillation magnetic field experimental rigs of intensity, including damped oscillation magnetic interference generator and current-carrying coil, damped oscillation magnetic interference generator exports current signal to current-carrying coil, current-carrying coil generates the adjustable magnetic field of magnetic field strength, tested protective device is placed in the magnetic field of current-carrying coil generation, when being tested, adjust magnetic field strength, for example increasing magnetic field is to appropriate level or until tested protective device protects failure, the ability of the tolerance magnetic interference of tested protective device is tested, to find the weak spot of tested protective device tolerance magnetic interference.Therefore; the experimental rig generates variable interference magnetic field strength; damped oscillation magnetic field strength can also be increased to the several times of calibrated generator; the truer actual working environment of simulation; make protective device to the interference free performance result more true and accurate of high-intensity magnetic field, solves the problems, such as that experimental test result is not consistent with actual conditions in the prior art.
Description
Technical field
The present invention relates to a kind of adjustable damped oscillation magnetic field experimental rigs of intensity.
Background technique
Protective device in electric system is during receiving signal, often by the interference of other electromagnetic signals,
This just easily causes erroneous judgement of the system to signal is obtained.Therefore, the researcher of related fields needs to carry out protective device
Electromagnetic compatibility testing targetedly takes inhibition and safeguard procedures to grasp the anti-interference ability of protective device, it is ensured that
The normal operation of system.
Damp oscillatory wave tests the insulator switch instances in outdoor high, the middle buckling power station of main representative, more particularly to
The switching of high voltage bus and the magnetic field harassing and wrecking of commercial plant.It stands outdoors, interferes the frequency of oscillation in magnetic field from 100kHz to several
MHz, wherein 100kHz to 1MHz is considered representing majority of case.It is existing when the vulnerability to jamming to protective device is tested
The maximum output magnetic field strength of experimental rig be about 100A/m.And in actual working environment, the interference of protective device
The frequency of oscillation in magnetic field has been usually more than the maximum output magnetic field strength of existing experimental rig, high-intensity magnetic field from 100kHz to several MHz
Low current in interference and coupling to digital signal is even more to have a huge impact to the quality of digital signal.Therefore, when test is wanted
When asking raising, the magnetic field strength that existing experimental rig provides is inadequate, moreover, existing experimental rig usually provides fixing intensity
Magnetic field still in actual conditions, the magnetic field strength in magnetic field is interfered not to be fixed and invariable, therefore, existing experimental rig is not
It can really reflect actual working condition, the uncontrollable of magnetic field strength causes to be not easy to find out protective device confrontation magnetic interference
Weak spot, the result in turn resulting in electromagnetic compatibility testing not can solve magnetic field under actual conditions and ask the interference of protective device
Topic.
Summary of the invention
The object of the present invention is to provide a kind of adjustable damped oscillation magnetic field experimental rigs of intensity, to solve existing examination
The magnetic field strength in magnetic field caused by experiment device cannot really reflect the problem of real work situation.
To achieve the above object, the present invention includes following technical scheme.
A kind of adjustable damped oscillation magnetic field experimental rig of intensity, including damped oscillation magnetic interference generator and current-carrying conductor
Circle, the current-carrying coil include a pair of of current terminal, and the output end of the damped oscillation magnetic interference generator is believed by electric current
Number line connects the current terminal, and the current-carrying coil generates the adjustable magnetic field of magnetic field strength, and tested protective device is placed on institute
In the magnetic field for stating current-carrying coil generation, the magnetic field strength that current-carrying coil generates is adjusted, thus to the tolerance magnetic of tested protective device
The ability of field interference is tested.
Damped oscillation magnetic interference generator exports current signal to current-carrying coil, and current-carrying coil generates magnetic field strength can
The magnetic field of tune, tested protective device are placed in the magnetic field of current-carrying coil generation, which may be implemented magnetic field strength
It adjusts, when being tested, accordingly adjusts magnetic field strength, such as increasing magnetic field according to the actual situation to appropriate level or increasing
It is big to protect failure to up to tested protective device, the ability of the tolerance magnetic interference of tested protective device is tested, thus
Find the weak spot of tested protective device tolerance magnetic interference.Therefore, which generates variable interference magnetic field strength, also
Damped oscillation magnetic field strength can be increased to the several times of existing experimental rig, truer simulation by increasing magnetic field
Actual working environment, the test effect made more meets complicated working environment can more paste when generating larger interference
The nearly true extreme case in scene makes protective device pair to find the weak spot of tested protective device magnetic field immunity to interference ahead of time
The interference free performance result more true and accurate of high-intensity magnetic field solves experimental test result and actual conditions not phase in the prior art
The problem of symbol.
Further, the current-carrying coil is the adjustable multiturn current-carrying coil of the number of turns, is adjusted by adjusting the number of turns with realizing
Magnetic field strength.
Further, tested protective device is placed on the magnetic field that the current-carrying coil generates by the way of immersion method
In.
Further, the experimental rig further includes current surveillance module and current acquisition module, the current acquisition mould
Block is arranged on the current-carrying coil, and for acquiring the electric current on current-carrying coil, the current acquisition module is exported described in connection
Current surveillance module, for monitoring the current strength on current-carrying coil.
Further, the current-carrying coil is square current-carrying coil.
Further, the current surveillance module is oscillograph, and the current acquisition module is current clamp, and current clamp is clipped in
On current-carrying coil, to acquire the electric current on current-carrying coil.
Detailed description of the invention
Fig. 1 is the functional block diagram of damped oscillation magnetic field experimental rig；
Fig. 2 is the circuit interconnect pattern of damped oscillation magnetic field experimental rig.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawing.
The present embodiment provides a kind of adjustable damped oscillation magnetic field experimental rigs of intensity, as shown in Figure 1, including damped oscillation
Magnetic interference generator and current-carrying coil, current-carrying coil include a pair of of current terminal, the both ends of current-carrying coil one electricity of each correspondence
Terminal is flowed, the current signal output end of damped oscillation magnetic interference generator connects the two current terminals by current signal line
Son, damped oscillation magnetic interference generator export current signal to current-carrying coil, and current-carrying coil can generate magnetic field strength can
The magnetic field of tune.In the present embodiment, a kind of adjustable implementation of magnetic field strength is provided, current-carrying coil is that the adjustable multiturn of the number of turns carries
Streamline circle (i.e. at least two circle current-carrying coils), specific the number of turns is set according to the actual situation, realizes adjusting by adjusting the number of turns
Magnetic field strength.Moreover, the electric current of damped oscillation magnetic interference generator output is constant, then, it can by regulating winding the number of turns
To adjust damped oscillation magnetic field strength.It certainly, can also be by adjusting current strength or coil as other embodiments
Size adjusts damped oscillation magnetic field strength.
Further, multiturn current-carrying coil is rectangular multiturn current-carrying coil, and tested protective device is placed on rectangular multiturn and carries
Among the magnetic field that streamline circle generates, i.e., the rectangular multiturn current-carrying coil is arranged in around tested protective device, in the present embodiment,
Tested protective device is placed in the magnetic field that rectangular multiturn current-carrying coil generates by the way of immersion method.
The above-mentioned several equipment being related to are specifically introduced below.
Tested protective device: tested protective device is the line protective devices of extra-high voltage, which contains multiple analog, number
Signal, vulnerable to electromagnetic interference.
Damped oscillation magnetic interference generator: in the present embodiment, the interferance generator of selection is EM TEST company
Cos500n damped oscillation magnetic simulation generator, passes through the damped oscillation magnetic simulation of the exportable 100A/m of standard coupling coil
Signal.Damped oscillation magnetic field is simulated high-pressure or the magnetic interference that middle buckling power station generates, and is coupled to power supply line, control line and letter
Issuable repeated transition interference phenomenon on number line.The interferance generator is applied on multiturn current-carrying coil, to tested guarantor
Protection unit is interfered, to detect tested protective device to the suffertibility of heavy damping oscillating magnetic field interference signal.
Multiturn current-carrying coil: multiturn current-carrying coil is mainly that the current signal that will be sent from interferance generator passes through multiturn line
Circle is converted into magnetic field signal and is then applied in tested protective device.Experimental rig is tried using multiturn current-carrying coil immersion method
The current signal spread out of from interferance generator is converted magnetic field signal by proved recipe formula, multiturn current-carrying coil, is carried by control multiturn
The number of turns of streamline circle and coil size control the intensity of magnetic field signal, by the current-carrying conductor snare adjusted in tested protection dress
It sets, bigger magnetic interference signal can be generated, for simulating the damped oscillation magnetic interference signal of the live limit.
In order to work normally tested protective device, a DC power supply is set, which is powered by power supply line
Tested protective device is connected, provides direct current for tested protective device, which can be outside rectangular multiturn current-carrying coil
Power supply.
The experimental rig further includes current surveillance module and current acquisition module, and current acquisition module is arranged in rectangular multiturn
On current-carrying coil, for acquiring the electric current on current-carrying coil, current acquisition module output connection current surveillance module, current surveillance
Module receives the collected current signal of current acquisition module, to monitor the current strength on current-carrying coil.It is specific as one
Embodiment, current acquisition module is current clamp, and current surveillance module is oscillograph, as shown in Fig. 2, current clamp is clipped in current-carrying
On coil, to acquire the electric current on current-carrying coil.Oscillograph is used to monitor the current strength of multiturn current-carrying coil, so as to push away
It calculates multiturn current-carrying coil and is coupled to the magnetic field strength in tested protective device, and then judge the limit magnetic field of tested protective device
Interfere tolerance.
As shown in Fig. 2, the current terminal of rectangular multiturn current-carrying coil is current terminal N and N ', damped oscillation magnetic field respectively
Interferance generator output end connects the two current terminals.Current clamp is clipped on rectangular multiturn current-carrying coil, is arranged on oscillograph
There is channel 1, current clamp connects oscillograph by channel 1, to monitor the current strength of multiturn current-carrying coil.
In addition, the positive and negative terminal of DC power supply is connect by power supply line with the positive and negative terminal of tested protective device.DC power supply, quilt
Survey protective device and interferance generator altogether.
Test process:
DC power supply is opened, is tested protective device power supply by power supply line, interferance generator sends current signal, passes through
Current signal line accesses on multiturn current-carrying coil, and current-carrying coil generates the magnetic field of some strength.It is supervised using current clamp and oscillograph
Depending on flowing through the current strength of multiturn current-carrying coil, to extrapolate the magnetic field strength that multiturn current-carrying coil generates in coil.It is logical
Multiturn current-carrying coil is overregulated to adjust magnetic field strength, for example increasing magnetic field to appropriate level or is applied to tested protection dress
The ability for judging tested protective device tolerance magnetic interference until tested protective device protection failure is set, tested protection is found
The weak spot of device tolerance magnetic interference.
Therefore, although each component part in the experimental rig is placed indoors, but it is possible to true outside simulating chamber,
Actual working environment.
Interferance generator, multiturn current-carrying coil described above etc. can use other specifications, the type of function of the same race
Number product.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.Base of the invention
This thinking is above-mentioned basic scheme, and for those of ordinary skill in the art, various changes are designed in introduction according to the present invention
The model of shape, formula, parameter do not need to spend creative work.It is right without departing from the principles and spirit of the present invention
The change, modification, replacement and modification that embodiment carries out are still fallen in protection scope of the present invention.
Claims (6)
1. a kind of adjustable damped oscillation magnetic field experimental rig of intensity, which is characterized in that occur including damped oscillation magnetic interference
Device and current-carrying coil, the current-carrying coil include a pair of of current terminal, the output end of the damped oscillation magnetic interference generator
The current terminal is connected by current signal line, the current-carrying coil generates the adjustable magnetic field of magnetic field strength, is tested protection dress
Placement location adjusts the magnetic field strength that current-carrying coil generates in the magnetic field that the current-carrying coil generates, to fill to tested protection
The ability for the tolerance magnetic interference set is tested.
2. the adjustable damped oscillation magnetic field experimental rig of intensity according to claim 1, which is characterized in that the current-carrying conductor
Circle is the adjustable multiturn current-carrying coil of the number of turns, by adjusting the number of turns to realize adjusting magnetic field strength.
3. the adjustable damped oscillation magnetic field experimental rig of intensity according to claim 1 or 2, which is characterized in that using leaching
Tested protective device is placed in the magnetic field that the current-carrying coil generates by the mode for entering method.
4. the adjustable damped oscillation magnetic field experimental rig of intensity according to claim 1 or 2, which is characterized in that the examination
Experiment device further includes current surveillance module and current acquisition module, and the current acquisition module is arranged on the current-carrying coil,
For acquiring the electric current on current-carrying coil, the current acquisition module output connects the current surveillance module, carries for monitoring
Current strength on streamline circle.
5. the adjustable damped oscillation magnetic field experimental rig of intensity according to claim 1 or 2, which is characterized in that the load
Streamline circle is square current-carrying coil.
6. the adjustable damped oscillation magnetic field experimental rig of intensity according to claim 4, which is characterized in that the electric current prison
Module is regarded as oscillograph, the current acquisition module is current clamp, and current clamp is clipped on current-carrying coil, to acquire on current-carrying coil
Electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810983024.1A CN109100594B (en) | 2018-08-27 | 2018-08-27 | Damping oscillation magnetic field test device with adjustable strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810983024.1A CN109100594B (en) | 2018-08-27 | 2018-08-27 | Damping oscillation magnetic field test device with adjustable strength |
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| CN109100594A true CN109100594A (en) | 2018-12-28 |
| CN109100594B CN109100594B (en) | 2021-09-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110988497A (en) * | 2019-11-28 | 2020-04-10 | 北京赛迪君信电子产品检测实验室有限公司 | Magnetic field immunity testing device and method for magnetic coupling digital isolator |
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| CN104700977A (en) * | 2015-02-15 | 2015-06-10 | 长沙天恒测控技术有限公司 | Electric energy meter DC magnetic field generator and interference test device |
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| US20050035768A1 (en) * | 2002-10-02 | 2005-02-17 | Germano Rabach | Method and electromagnetic sensor for measuring partial discharges in windings of electrical devices |
| CN102103193A (en) * | 2010-12-16 | 2011-06-22 | 福建水口发电集团有限公司 | Device and method for measuring magnetic induction intensity based on colossal magnetoresistance effect |
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| CN104700977A (en) * | 2015-02-15 | 2015-06-10 | 长沙天恒测控技术有限公司 | Electric energy meter DC magnetic field generator and interference test device |
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| CN109100594B (en) | 2021-09-07 |
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