CN109655693A - A kind of device and test method for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field - Google Patents
A kind of device and test method for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field Download PDFInfo
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- CN109655693A CN109655693A CN201811638222.0A CN201811638222A CN109655693A CN 109655693 A CN109655693 A CN 109655693A CN 201811638222 A CN201811638222 A CN 201811638222A CN 109655693 A CN109655693 A CN 109655693A
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- 238000012360 testing method Methods 0.000 title claims abstract description 138
- 238000010998 test method Methods 0.000 title claims abstract description 8
- 238000009434 installation Methods 0.000 claims abstract description 16
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- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 230000005611 electricity Effects 0.000 claims description 7
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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 invention discloses a kind of devices and test method for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, including package casing and internal structure, the package casing is equipped with installation's power source port, field supply input port, field coil output port, external impressed current table port, the internal structure includes control module, control the injection of electric current and the Electromagnetic Control module closed in field coil, regulation test period and the test period control module for showing test remaining time, for real-time measurement and show the frequency measurement display module of the power frequency in power frequency magnetic field coil, the Electromagnetic Control module, test period control module is connect with control module.The power frequency frequency multiplication magnetic field that described device is suitable for different tests frequency is tested, and test frequency can monitor display in real time, and test current and test period accurately control.
Description
Technical field
The present invention relates to technical field of electromagnetic compatibility measurement, particularly, are related to a kind of for electromagnetic compatibility power frequency frequency multiplication magnetic
The device and test method of field test.
Background technique
With the development of science and technology, electronic technology gradually to high frequency, high speed, high-precision, high reliability, high sensitivity,
Highly integrated etc. development, the emc issue of Electrical and Electronic equipment becomes increasingly conspicuous, and the height by national governments
Degree is paid attention to, and more and more EMC Directives, codes and standards are gradually put into effect and require to enforce.Electro Magnetic Compatibility refers to
Equipment or system can work normally in its electromagnetic environment and not constitute the electromagnetism that cannot be born to anything in the environment and disturb
The ability disturbed.Therefore, electromagnetic compatibility includes the requirement of two aspects: on the one hand referring to equipment in normal course of operation to place
The electromagnetic interference that environment generates is no more than certain limit value；On the other hand refer to that equipment is dry to electromagnetism present in the environment of place
It disturbs with a degree of immunity to interference, i.e. electromagnetic susceptibility.
Power frequency magnetic field test is pilot project common in electromagnetic compatibility test.Power frequency magnetic field is by the power frequency electric in conductor
It is miscarriage life or minimal amount of produced by other neighbouring devices (leakage magnetic flux of such as transformer).On the ground for thering is electric current to flow through
Side is all with magnetic field, since there are two types of modes for the generation in magnetic field in real work: first is that as caused by normal operating current
Stable, the relatively small magnetic field of field strength, another kind are that the duration as caused by improper operating current is short but field strength
Very big magnetic field.Power frequency magnetic field test be exactly examine equipment to be in (such as equipment is close to disturbing with its specific position and mounting condition
Disturb source) relevant power frequency magnetic field when, to magnetic field harassing and wrecking immunity to interference ability.
In power frequency magnetic field test, magnetic field strength, test frequency and the duration of test runs of test are according to specific product class
Regulation in standard or product standard is set, if product standard without particular/special requirement, test frequency and equipment under test
Power supply mode is related, generally for network source power supply equipment, test frequency according to the frequency of supply claimed in product nameplate come
It carries out, for the product of internal electric source power supply, then test should all be tested in two frequencies of 50Hz and 60Hz.Currently, each
The equipment of laboratory can meet the requirement of above-mentioned test frequency substantially.However, certain product standards test its power frequency magnetic field
Particular/special requirement is proposed, for example, standard YY 0885 provides that the power frequency magnetic field test frequency of dynamic ecg is 3 times of power frequencies, i.e.,
Test should carry out under two frequencies of 150Hz and 180Hz, this requirement is not achieved in current each existing testing equipment in laboratory.
Individual laboratories, which by variable-frequency power sources connect a pulley resistance adjustment, to be injected the electric current of coil and is tested, electricity when test
Stream frequency cannot be monitored in real time, and the current strength in duration of test runs and injection coil cannot be controlled accurately, and be operated
With certain risk.
Summary of the invention
The present invention is directed to overcome at least one defect of the above-mentioned prior art, provide a kind of for electromagnetic compatibility power frequency frequency multiplication
The device of magnetic field test is applicable to the power frequency magnetic field device of different tests frequency, and highest test frequency is up to 400Hz, examination
Display can be monitored in real time by testing frequency, and test current and test period accurately control, and had and used safe, easy to operate, user
Power frequency magnetic field test can be carried out at any frequency according to the test requirements document of product, flexibility ratio is high, and it is special to be able to satisfy certain products
The requirement of test frequency.
Another object of the present invention is to provide a kind of test methods for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field.
The technical solution adopted by the present invention is that:
A kind of device for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, including package casing and internal structure, the envelope
Casing is equipped with installation's power source port, field supply input port, field coil output port, external impressed current table port, institute
Internal structure is stated to include control module, control the Electromagnetic Control module of injection with the closing of electric current, regulation test in field coil
Time and the test period control module for showing test remaining time, for real-time measurement and show the electricity in power frequency magnetic field coil
The frequency measurement display module of frequency is flowed, the Electromagnetic Control module, test period control module are connect with control module.
Device of the present invention for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field uses package casing by internal structure
Encapsulation, using safe and appearance looks elegant, in the internal structure, test period control module is connect with control module, Ke Yixuan
It selects required test period and shows test remaining time, control module also calculates the time and controls Electromagnetic Control module, electromagnetism
Control module controls the injection and closing of electric current in field coil, and frequency measurement display module is used to monitor and show power frequency frequency multiplication
Test frequency used by magnetic field is tested.
In actual use, the external variable-frequency power sources in installation's power source port, field supply input port pass through external tune
Depressor to connect with external variable-frequency power sources, and field coil needed for the test of power frequency frequency multiplication magnetic field is passed through field coil output port
It is connected to the device for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, external impressed current table port external impressed current table.Carry out electricity
When magnetic compatibility test, operator selects power frequency frequency multiplication magnetic field duration of test runs by test period control module, and shows examination
It tests remaining time, frequency measurement display module real-time monitoring simultaneously shows the power frequency in power frequency frequency multiplication field coil, external
Ammeter shows the current strength being injected into power frequency frequency multiplication field coil.The power frequency frequency multiplication magnetic field of different tests frequency can be achieved
Test, test frequency can monitor display in real time, and test current and test period accurately control, and have and use safe, operation side
It just, can one-key start or the advantages that abort.
Preferably, the frequency measurement display module is connect with installation's power source port.
Preferably, described device further includes that current limiting safeguard resistor and control are described for electromagnetic compatibility power frequency frequency multiplication magnetic field
The switch of experimental rig has the opening of switch on the package casing.Current limiting safeguard resistor is used to divide to field coil, prevents
Electric current in coil is excessive, and switch is opened and closed for controlling described work for electromagnetic compatibility power frequency frequency multiplication magnetic field experimental rig
It closes.Further, the control module, Electromagnetic Control module, current limiting safeguard resistor are sequentially connected.The current limiting safeguard resistor is also
It is connect with field supply input port.The switch is connect with the control module.
Preferably, described device further includes the power module converted for the voltage to installation's power source port.Power supply
The AC-input voltage of installation's power source port can be converted to lower direct voltage output by module, such as can be by 220V voltage
Change into 5V voltage output.Specifically, the power module can be AC/DC Switching Power Supply.
Preferably, the Electromagnetic Control module is field circuit on-off relay, and field circuit on-off relay is used to control
The injection and closing of electric current in field coil processed.Further, the field circuit on-off relay and field coil output end
Mouth connection.
Preferably, test period control module includes selection of time knob and LED display, and the selection of time knob is set
There are several gears of corresponding different time selection, set-up time selection knob and LED display are provided on the package casing
Opening.Different stalls are arranged in selection of time knob, respectively correspond the different tests duration, are realized by control module to power frequency
The control of frequency multiplication magnetic field duration of test runs.Test remaining time in LED display real-time display power frequency frequency multiplication magnetic field.
Preferably, the frequency measurement display module is frequency meter, and the aobvious of Mounting frequency meter is provided on the package casing
The opening of display screen curtain.The frequency of frequency meter real-time monitoring and display power frequency frequency multiplication magnetic field test current.
Preferably, when the device for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field further includes for driving test remaining
Between the driving circuit that shows of display module.Specifically, the driving circuit is circuit board, and driving LED display is shown.
Preferably, the external variable-frequency power sources of described device power port.The supply voltage of the variable-frequency power sources be 100~
240V, frequency of supply are test frequency used by power frequency frequency multiplication magnetic field is tested.
Preferably, the field supply input port is connect by transformer with variable-frequency power sources.Field supply input port
Supply voltage maximum be no more than 50V, specific voltage value is adjusted by external pressure regulator, so that being injected into the electricity in coil
Current strength needed for stream reaches corresponding test class.The supply voltage of field supply input port passes through change in the present invention
Depressor is adjusted, can be between 15V~50V, and frequency of supply is test frequency used by power frequency frequency multiplication magnetic field is tested.
Preferably, external impressed current table port is connect with external AC ammeter.External impressed current table port connects external electrical
Flow table is used to show the current value being injected into coil.
Preferably, the field coil output port is connect with external magnetic field coil.The port of the external magnetic field coil
It is matched with the coil port of power frequency frequency multiplication magnetic field testing equipment, field coil output port is used to connect the test of power frequency frequency multiplication magnetic field
Coil.
Preferably, the resistance of the current limiting safeguard resistor is 5 Ω, power 200W.
The control module is control circuit board.
The test method for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, includes the following steps:
S1, the power port of device is connect with variable-frequency power sources, field supply input port is connected by transformer and variable-frequency power sources
It connects, field coil output port is connect with field coil, and external impressed current table port is connect with external AC ammeter；
S2, the output frequency of variable-frequency power sources is set as to test frequency used by power frequency frequency multiplication magnetic field is tested, passes through transformer tune
The input voltage of field supply input port is saved, so that electric current needed for the current value that external AC ammeter measures reaches test is strong
Degree；
S3, selection of time knob is adjusted to required gear, starts the test of power frequency frequency multiplication magnetic field, LED display by lower switch
Real-time display is tested remaining time, and the display screen of frequency meter shows the frequency of test current, when testing remaining time is 0,
Electromagnetic Control module closes the injection of electric current in field coil.
Compared with prior art, the invention has the benefit that of the present invention try for electromagnetic compatibility power frequency frequency multiplication magnetic field
The device tested can realize that the power frequency frequency multiplication magnetic field under any different frequency is tested in order to user, meet the power frequency times of different product
The requirement of frequency measurement of magnetic field；Device of the present invention for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field can accurately be held Control experiment
Continuous time and test current, strictly meet standard requirements；It is of the present invention to be used for what electromagnetic compatibility power frequency frequency multiplication magnetic field was tested
Device is easy to operate using safe, can one-key start or abort, performance stablizes, long service life.
Detailed description of the invention
Fig. 1 is the outside port structural frames described in embodiment for the device of electromagnetic compatibility power frequency frequency multiplication magnetic field test
Figure.
Fig. 2 is the internal circuit principle frame described in embodiment for the device of electromagnetic compatibility power frequency frequency multiplication magnetic field test
Figure.
Detailed description of the invention: 1, installation's power source port；2, field supply input port；3, field coil output port；4, external
Ammeter port；5, package casing；6, power module；8, control module；9, field circuit on-off relay；10, selection of time
Knob；11, LED display；12, frequency meter；13, current limiting safeguard resistor；14, it switchs；15, driving circuit；16, field coil；
17, AC ammeter.
Specific embodiment
Attached drawing of the present invention only for illustration, is not considered as limiting the invention.It is following in order to more preferably illustrate
Embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent the size of actual product；For art technology
For personnel, the omitting of some known structures and their instructions in the attached drawings are understandable.
As shown in Figure 1, present embodiment discloses a kind of device for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, including envelope
Casing 5 and internal structure, the package casing 5 are equipped with installation's power source port 1, field supply input port 2, field coil
Output port 3, external impressed current table port 4, as shown in Fig. 2, the internal structure includes for the voltage to installation's power source port 1
The power module 6 converted, control module 8, in control field coil the injection of electric current and the field circuit on-off closed after
Electric appliance 9, the selection of time knob 10 for regulating and controlling power frequency frequency multiplication magnetic field duration of test runs, when display power frequency frequency multiplication magnetic field test is remaining
Between LED display 11, for real-time measurement and show the frequency meter 12 of power frequency in power frequency magnetic field coil, current-limiting protection
The switch 14 of resistance 13 and the control device for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, the power module 6, control
Molding block 8, field circuit on-off relay 9, current limiting safeguard resistor 13 are sequentially connected, and the selection of time knob 10, LED are shown
Screen 11, switch 14 are connect with control module 8, and power module 6 and frequency meter 12 are connect with installation's power source port 1, field circuit
On-off relay 9 is connect with field coil output port 3, and current limiting safeguard resistor 13 is connect with field supply input port 2.
Device described in the present embodiment for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field uses package casing by internal junction
Structure encapsulation, using safe and appearance looks elegant, the power module 6 in the internal structure can be by the input electricity of installation's power source port 1
Pressure is converted to lower voltage output；The selection of time knob 10, LED display 11, switch 14 connect with control module 8
It connects, selection of time knob 10, LED display 11, switch 14 can be realized by control module 8 is used for electromagnetic compatibility work to described
The corresponding control of the device of frequency frequency multiplication magnetic field test, control module 8 also calculate the time and control field circuit on-off relay 9,
Field circuit on-off relay 9 controls the injection and closing of electric current in field coil, and frequency meter 12 is used to monitor and show power frequency
Test frequency used by frequency multiplication magnetic field is tested, current limiting safeguard resistor 13 are used to divide to field coil 16, prevent in coil
Electric current is excessive.
In actual use, the external variable-frequency power sources in installation's power source port 1, field supply input port 2 pass through external tune
Depressor to connect with external variable-frequency power sources, and field coil needed for power frequency magnetic field test is connect by field coil output port 3
To the device for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, 4 external impressed current table of external impressed current table port.Carry out electromagnetism
When compatibility test, the switch 14 of operator's control device for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, due to power supply
Module 6 is connect with installation's power source port 1, can convert input voltage into lower voltage output, and operator is selected by the time
It selects knob 10 and selects power frequency frequency multiplication magnetic field duration of test runs, selection of time knob 10 is arranged different stalls, respectively corresponds difference
Duration of test runs realizes the control to power frequency frequency multiplication magnetic field duration of test runs by control module 8, and LED display 11 is aobvious
Show test remaining time, 12 real-time monitoring of frequency meter simultaneously shows the power frequency in power frequency frequency multiplication field coil, AC ammeter 17
The current strength that is injected into power frequency frequency multiplication field coil is shown, it can be achieved that the power frequency frequency multiplication magnetic field of different tests frequency is tested,
Test frequency can monitor display in real time, and test current and test period accurately control, safe with using, easy to operate, can
The advantages that one-key start or abort.
Further, in this embodiment the power module is AC/DC Switching Power Supply.
Further, the device for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field further includes for driving test remaining
The driving circuit 15 that time showing module is shown.Specifically, the driving circuit 15 is drive circuit board, drives LED display
Display.
Further, in embodiment, the external variable-frequency power sources of described device power port 1.The power supply electricity of the variable-frequency power sources
Pressure is 100~240V, and frequency of supply is test frequency used by power frequency frequency multiplication magnetic field is tested.
Further, in this embodiment the field supply input port 2 is connect by transformer with variable-frequency power sources.Magnetic
The supply voltage maximum of field current input port 2 is no more than 50V, and specific voltage value is adjusted by external pressure regulator, so that
Current strength needed for the electric current being injected into coil reaches corresponding test class.Field supply input terminal in the present embodiment
The supply voltage of mouth 2 is adjusted by transformer, can be between 15V~50V, and frequency of supply is adopted by the test of power frequency frequency multiplication magnetic field
Test frequency.
Further, in this embodiment external impressed current table port 4 is connect with external AC ammeter 17.External impressed current
Table port 4 connects external electrical flow table and is used to show the current value being injected into coil.
Further, in this embodiment the field coil output port 3 is connect with external magnetic field coil 16.It is described outer
The port 3 of portion's field coil is matched with the coil port of power frequency frequency multiplication magnetic field testing equipment, and field coil output port 3 is used to connect
Connect the coil of power frequency frequency multiplication magnetic field test.
Further, in this embodiment the resistance of the current limiting safeguard resistor is 5 Ω, power 200W.
Further, in this embodiment the control module is control circuit board.
Test method described in the present embodiment for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, includes the following steps:
S1, the power port 1 of device is connect with variable-frequency power sources, field supply input port 2 passes through transformer and variable-frequency power sources
Connection, field coil output port 3 are connect with field coil 16, and external impressed current table port 4 is connect with external AC ammeter 17；
S2, the output frequency of variable-frequency power sources is set as to test frequency used by power frequency frequency multiplication magnetic field is tested, passes through transformer tune
The input voltage of field supply input port 2 is saved, so that the current value that external AC ammeter 17 measures reaches the required electric current of test
Intensity；
S3, selection of time knob 10 is adjusted and arrives required gear, start the test of power frequency frequency multiplication magnetic field by lower switch 14, LED is aobvious
11 real-time display of display screen is tested remaining time, and the display screen of frequency meter 12 shows the frequency of test current, when testing remaining
Between be 0 when, Electromagnetic Control module close field coil in electric current injection.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate technical solution of the present invention example, and
It is not the restriction to a specific embodiment of the invention.It is all made within the spirit and principle of claims of the present invention
Any modifications, equivalent replacements, and improvements etc., should all be included in the scope of protection of the claims of the present invention.
Claims (10)
1. a kind of device for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, which is characterized in that including package casing (5) and inside
Structure, the package casing (5) are equipped with installation's power source port (1), field supply input port (2), field coil output end
Mouth (3), external impressed current table port (4), the internal structure include control module (8), the injection for controlling electric current in field coil
With the Electromagnetic Control module of closing, regulation test period and show the test period control module of test remaining time, for real
When measure and show the frequency measurement display module of the power frequency in power frequency magnetic field coil (16), the Electromagnetic Control module,
Test period control module is connect with control module (8).
2. the device according to claim 1 for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, which is characterized in that the dress
Set further includes current limiting safeguard resistor (13) and the control switch for being used for electromagnetic compatibility power frequency frequency multiplication magnetic field experimental rig
(14), the opening of installation switch (14) is provided on the package casing (5).
3. the device according to claim 1 for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, which is characterized in that the dress
Setting further includes the power module (6) converted for the voltage to installation's power source port (1).
4. the device according to claim 1 for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, which is characterized in that the electricity
Magnetic control module is field circuit on-off relay (9).
5. the device according to claim 1 for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, which is characterized in that when test
Between control module include selection of time knob (10) and LED display (11), the selection of time knob (10) be equipped with it is corresponding not
With several gears of selection of time, set-up time selection knob (10) and LED display (11) are provided on the package casing (5)
Opening.
6. the device according to claim 1 for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, which is characterized in that the frequency
It is frequency meter (12) that rate, which measures display module, and opening for the display screen of Mounting frequency meter (12) is provided on the package casing (5)
Mouthful.
7. the device according to claim 1 for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, which is characterized in that the use
In the driving that the device of electromagnetic compatibility power frequency frequency multiplication magnetic field test further includes for driving test remaining time display module to show
Circuit (15).
8. the device according to claim 1 for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, which is characterized in that the dress
Set power port (1) external variable-frequency power sources；The field supply input port (2) is connect by transformer with variable-frequency power sources.
9. the device according to claim 1 for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, which is characterized in that described outer
Ammeter port (4) is connect to connect with external AC ammeter (17).
10. a kind of test method for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field, which comprises the steps of:
S1, the power port (1) of device is connect with variable-frequency power sources, field supply input port (2) passes through transformer and frequency conversion
Power supply connection, field coil output port (3) are connect with field coil, external impressed current table port (4) and external AC ammeter
(17) it connects；
S2, the output frequency of variable-frequency power sources is set as to test frequency used by power frequency frequency multiplication magnetic field is tested, passes through transformer tune
The input voltage for saving field supply input port (2), so that the current value that external AC ammeter (17) measures reaches needed for test
Current strength；
S3, selection of time knob (10) are adjusted and arrive required gear, start the test of power frequency frequency multiplication magnetic field by lower switch (14),
LED display (11) real-time display is tested remaining time, and the display screen of frequency meter (12) shows the frequency of test current, works as examination
Test remaining time be 0 when, Electromagnetic Control module close field coil in electric current injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811638222.0A CN109655693B (en) | 2018-12-29 | 2018-12-29 | Device and method for electromagnetic compatibility power frequency doubling magnetic field test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811638222.0A CN109655693B (en) | 2018-12-29 | 2018-12-29 | Device and method for electromagnetic compatibility power frequency doubling magnetic field test |
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| Publication Number | Publication Date |
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| CN109655693A true CN109655693A (en) | 2019-04-19 |
| CN109655693B CN109655693B (en) | 2023-12-12 |
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| CN201811638222.0A Active CN109655693B (en) | 2018-12-29 | 2018-12-29 | Device and method for electromagnetic compatibility power frequency doubling magnetic field test |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101344556A (en) * | 2008-09-03 | 2009-01-14 | 北京航空航天大学 | Method for enlarging effective dynamic range in electromagnetic compatibility test |
| CN101377534A (en) * | 2008-09-24 | 2009-03-04 | 北京航空航天大学 | Method for setting signal source amplitude initial value in electromagnetic compatible sensitivity test |
| CN204694836U (en) * | 2015-06-18 | 2015-10-07 | 江西服装学院 | A kind of electric energy meter power frequency magnetic field influence amount test unit |
| CN106597356A (en) * | 2016-12-03 | 2017-04-26 | 国网江西省电力公司电力科学研究院 | Single-phase electric energy meter power frequency magnetic field influence quantity testing apparatus |
| CN209486209U (en) * | 2018-12-29 | 2019-10-11 | 广东省医疗器械质量监督检验所 | A kind of device for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field |
-
2018
- 2018-12-29 CN CN201811638222.0A patent/CN109655693B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101344556A (en) * | 2008-09-03 | 2009-01-14 | 北京航空航天大学 | Method for enlarging effective dynamic range in electromagnetic compatibility test |
| CN101377534A (en) * | 2008-09-24 | 2009-03-04 | 北京航空航天大学 | Method for setting signal source amplitude initial value in electromagnetic compatible sensitivity test |
| CN204694836U (en) * | 2015-06-18 | 2015-10-07 | 江西服装学院 | A kind of electric energy meter power frequency magnetic field influence amount test unit |
| CN106597356A (en) * | 2016-12-03 | 2017-04-26 | 国网江西省电力公司电力科学研究院 | Single-phase electric energy meter power frequency magnetic field influence quantity testing apparatus |
| CN209486209U (en) * | 2018-12-29 | 2019-10-11 | 广东省医疗器械质量监督检验所 | A kind of device for the test of electromagnetic compatibility power frequency frequency multiplication magnetic field |
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