CN206945859U - A kind of filter applied to EMC test - Google Patents
A kind of filter applied to EMC test Download PDFInfo
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- CN206945859U CN206945859U CN201720886317.9U CN201720886317U CN206945859U CN 206945859 U CN206945859 U CN 206945859U CN 201720886317 U CN201720886317 U CN 201720886317U CN 206945859 U CN206945859 U CN 206945859U
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Abstract
The utility model discloses a kind of filter applied to EMC test, including the three-phase voltage filtration module and three-phase current filtration module integrated, three-phase voltage filtration module and three-phase current filtration module form by multi-stage bandpass filtration module.The utility model passes through said structure, the device is installed between electromagnetic compatibility test equipment and test power supply, interference signal can be effective filtered out, reduce the influence to source-side device, so that common programmed criteria source can be used as testing power supply, without using expensive electromagnetic compatibility special test power supply.
Description
Technical field
It the utility model is related to field of electromagnetic compatibility detection, and in particular to a kind of filtering applied to EMC test fills
Put.
Background technology
In industrial products type approval test, electromagnetic compatibility (EMC) experiment is important pilot project.EMC test bag
Include radio frequency electromagnetic field immunity to interference, the conduction interference immunity to interference of radiofrequency field sensing, Clusters immunity to interference, decay Sasser
Immunity experiment etc., additional interference electromagnetic field frequency is up to 100kHz~2GHz in experiment, and voltage is up to 8kV.Such intensity is done
Signal function is disturbed in power supply and standard device, easily causes the operation irregularity of power supply and standard device even failure.
On the other hand, when carrying out EMC test, test power supply mainly has two kinds.One kind is to use pressure regulator, is adjusted
The primary of depressor directly electrically connects with city, adjusts the certain magnitude of voltage of secondary output.This test power supply is fairly simple, and cost is low
It is honest and clean, but antijamming capability is weaker, in addition, the interference signal that electromagnetic compatibility test equipment occurs will introduce city by pressure regulator
Electricity, cause city's electropollution.Another is to use electromagnetic compatibility special test power supply, and this test power supply is typically by standard
Signal generation, then obtained by power amplification and output feedback closed loop.It is related that although this power supply can be used as standard to carry out
Error analysis calculation, but circuit design is more complicated, development technique difficulty is big, and cost is very high.
Simultaneously as the additional interference signal of EMC test has the characteristics of high frequency, voltage levels, existing common filter
Ripple device can not its effectively filtered out, therefore a kind of filter design specifically for EMC test interference signal is to protecting
It is most important to demonstrate,prove the development of electromagnetic experiment accurate and effective.
Utility model content
Technical problem to be solved in the utility model is that design is a kind of specifically for EMC test interference signal
Filter is installed at electromagnetic compatibility test equipment, and it is an object of the present invention to provide a kind of filter applied to EMC test
Between test power supply, interference signal can be effective filtered out, reduces the influence to source-side device so that common programmed criteria
Source can be used as testing power supply, without using expensive electromagnetic compatibility special test power supply.
The utility model is achieved through the following technical solutions：
A kind of filter applied to EMC test, including the three-phase voltage filtration module integrated and three
Phase current filtration module, three-phase voltage filtration module and three-phase current filtration module form by multi-stage bandpass filtration module.
Present apparatus interference signal characteristic (frequency, voltage class) according to produced by EMC test designs, can be to interference
Signal carries out specific aim and filtered out.Filter is installed between test power supply and electromagnetic compatibility test equipment, by three-phase voltage, three
Interference signal in phase current loop filters out, and prevents interference signal crosstalk from, to source-side device, causing the works such as power supply, standard device
Make exception, while nor affect on being normally carried out for EMC test.The arrangement achieves do not changing test power supply output spy
Under implementations, effective filter out electromagnetic compatibility equipment and produce interference signal, avoid interference signal from being crosstalked into test power supply and cause work
Make abnormal so that common programmed criteria source can be used as testing power supply, without special using expensive electromagnetic compatibility
Test power supply.The device substantially reduces equipment cost, and avoid city while the requirement of EMC test detection project is met
Electropollution problem.And the device is applied to various EMC tests, there is high pressure resistant, high frequency, high current signal capabilities, nothing
Source, other testing equipment characteristics and function are not influenceed.
The device includes 2 three-phase voltage, three-phase current filtration modules, integrates, independently of other test equipments,
Easily access, there is the characteristics of small volume, light weight.In EMC test, the interference as produced by electromagnetic compatibility test equipment
Signal loading is in voltage circuit, to avoid interference signal through voltage circuit crosstalk source-side device, in source-side device and electromagnetism
Voltage filter is set between compatibility testing device.Interference signal may act on current loop by Device under test simultaneously, so as to right
Test power supply interferes, and therefore, while is filtered in current loop device current.
Preferably, the three-phase voltage filtration module includes 8 differential mode inductance L1-L8,8 feedthrough capacitor C5-C12 and is total to
Be sequentially connected in series between the input and output end of mould inductance L, UA phase voltage differential mode inductance L1, common mode inductance L port 1,
Common mode inductance L port 2 and differential mode inductance L5, drop-down ground connection electricity is set between differential mode inductance L1 and common mode inductance L port 1
Hold C5, drop-down ground capacity C9 is set between common mode inductance L port 2 and differential mode inductance L5；The input of UB phase voltages and
Differential mode inductance L2, common mode inductance L port 3, common mode inductance L port 4 and differential mode inductance are sequentially connected in series between output end
L6, drop-down ground capacity C6 is set between differential mode inductance L2 and common mode inductance L port 3, in the common mode inductance L He of port 4
Drop-down ground capacity C10 is set between differential mode inductance L6；Difference is sequentially connected in series between the input and output end of UC phase voltages
Mould inductance L3, common mode inductance L port 5, common mode inductance L port 6 and differential mode inductance L7, in differential mode inductance L3 and common mode inductance
Drop-down ground capacity C7 is set between L port 5, drop-down ground connection is set between common mode inductance L port 6 and differential mode inductance L7
Electric capacity C11；Be sequentially connected in series between the input and output end of UN phase voltages differential mode inductance L4, common mode inductance L port 7,
Common mode inductance L port 8 and differential mode inductance L8, drop-down ground connection electricity is set between differential mode inductance L4 and common mode inductance L port 7
Hold C8, drop-down ground capacity C12 is set between common mode inductance L port 8 and differential mode inductance L8.
Preferably, the three-phase voltage filtration module also includes 4 piezo-resistance R1-R4 and 4 high-voltage capacitance C1-C4,
Piezo-resistance R1 port 2 connects UA phase voltage inputs, other end ground connection；High-voltage capacitance C1 port 1 connects the input of UA phase voltages
End, other end ground connection；Piezo-resistance R2 port 2 connects UB phase voltage inputs, other end ground connection；High-voltage capacitance C2 port 1
Connect UB phase voltage inputs, other end ground connection；Piezo-resistance R3 port 2 connects UC phase voltage inputs, other end ground connection；High pressure
Electric capacity C3 port 1 connects UC phase voltage inputs, other end ground connection；Piezo-resistance R4 port 2 connects UN phase voltage inputs, separately
One end is grounded；High-voltage capacitance C4 port 1 connects UN phase voltage inputs, other end ground connection.
Preferably, every circuitry phase figure of the three-phase current filtration module is identical, A phase currents filtration module therein
Including 2 piezo-resistance R5-R6,2 high-voltage capacitance C13-C14,4 differential mode inductance L9-L12,4 feedthrough capacitor C15-C18,
X electric capacity C19,2 Y capacitance C20-C21 and common mode inductance L0, the company of being sequentially connected in series between the IA1+ ends of A phase currents and IA2+ ends
Connect differential mode inductance L9, common mode inductance L0 port 1, common mode inductance L0 port 2 and differential mode inductance L11, high-voltage capacitance C13 end
Mouth 1 connects the IA1+ ends of A phase currents, other end ground connection；Piezo-resistance R5 port 2 connects the IA1+ ends of A phase currents, the other end
Ground connection；Connection drop-down ground connection feedthrough capacitor C15 between differential mode inductance L9 and common mode inductance L0 port 1；Common mode inductance L0 end
Connection drop-down ground connection feedthrough capacitor C17 between 2 and differential mode inductance L11 of mouth；Between the IA3- ends of A phase currents and IA4- ends successively
It is connected in series differential mode inductance L10, common mode inductance L0 port 3, common mode inductance L0 port 4 and differential mode inductance L12, high-voltage capacitance
C14 port 1 connects the IA3- ends of A phase currents, other end ground connection；Piezo-resistance R6 port 2 connects the IA3- of A phase currents
End, other end ground connection；Connection drop-down ground connection feedthrough capacitor C16 between differential mode inductance L10 and common mode inductance L0 port 3；Common mode
Connection drop-down ground connection feedthrough capacitor C18 between inductance L0 port 4 and differential mode inductance L12；In common mode inductance L0 port 1 and altogether
Y capacitance C21 is also sequentially connected in series between mould inductance L0 port 3 and C20, X electric capacity are connected in parallel on the Y capacitance C21 being connected in series
With C20 both ends.
Device filter range interference signal characteristic (frequency, voltage class) according to produced by EMC test uses only
Special voltage filtering circuit design and current filtering circuit design, can enter the hand-manipulating of needle to interference signal caused by EMC test
Property is filtered out.
Preferably, each differential mode inductance includes 5 folded magnet rings of string and a wire, and wire is worn among the folded magnet ring of 5 strings
Cross.
Preferably, common mode inductance L includes two magnet rings stacked and the wire of four kinds of colors, the wire of four kinds of colors
It is wound on parallel on two magnet rings stacked；Common mode inductance L0 includes leading for two magnet rings stacked and two kinds of colors
Line, the wire of two kinds of colors is wound on two magnet rings stacked and two kinds of lead loop are in opposite direction.
Preferably, differential mode inductance L1-L8 using HR6.8*15.3*4.2 magnet ring, differential mode inductance L9-L12 use
It is long cartridge type EMI magnet rings.
The utility model compared with prior art, has the following advantages and advantages：
1st, the utility model substantially reduces equipment cost, had while the requirement of EMC test detection project is met
Effect reduces influence of the electromagnetic compatibility interference signal to source-side device, prevents interference signal crosstalk from, to mains side, avoiding civil power
Pollution problem, and the device is applied to various EMC tests, there is good wave filtering effect, easy to use, high pressure resistant, high
Frequently, high current signal capabilities, passive, and other testing equipment characteristics and function are not influenceed, it can be widely used for various electronic products
In EMC test.
2nd, the utility model includes 2 three-phase voltage, three-phase current filtration modules, integrates, independently of other surveys
Equipment, easily access are tried, there is the characteristics of small volume, light weight.
3rd, the utility model causes common programmed criteria source to can be used as testing power supply, without using costliness
Electromagnetic compatibility special test power supply, while the requirement of EMC test detection project is met, substantially reduce equipment cost.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the utility model embodiment, forms the one of the application
Part, the restriction to the utility model embodiment is not formed.In the accompanying drawings：
Fig. 1 is the utility model application principle block diagram；
Fig. 2 is three-phase voltage filtration module circuit diagram；
Fig. 3 is the A phase current filter circuit figures in three-phase current filtration module.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, it is not intended as to restriction of the present utility model.
Embodiment 1：
As shown in figure 1, the utility model includes a kind of filter applied to EMC test, including it is integrated in one
The three-phase voltage filtration module and three-phase current filtration module risen, three-phase voltage filtration module and three-phase current filtration module by
Multi-stage bandpass filtration module forms, filter range 50kHz to 2GHz, can effectively filter out and be disturbed caused by electromagnetic compatibility test equipment
Signal, retain power-frequency voltage, the current signal of power supply output.Three-phase voltage filtration module and three-phase current filtration module therein
Connecting test power supply, electromagnetic compatibility test equipment and Device under test simultaneously, are also connected between Device under test and voltage filter module
Electromagnetic compatibility test equipment.
Present apparatus interference signal characteristic (frequency, voltage class) according to produced by EMC test designs, can be to interference
Signal carries out specific aim and filtered out.Filter is installed between test power supply and electromagnetic compatibility test equipment, by three-phase voltage, three
Interference signal in phase current loop filters out, and prevents interference signal crosstalk from, to source-side device, causing the works such as power supply, standard device
Make exception, while nor affect on being normally carried out for EMC test.The arrangement achieves do not changing test power supply output spy
Under implementations, effective filter out electromagnetic compatibility equipment and produce interference signal, avoid interference signal from being crosstalked into test power supply and cause work
Make abnormal so that common programmed criteria source can be used as testing power supply, without special using expensive electromagnetic compatibility
Test power supply.The device substantially reduces equipment cost, and avoid city while the requirement of EMC test detection project is met
Electropollution problem.And the device is applied to various EMC tests, there is high pressure resistant, high frequency, high current signal capabilities, nothing
Source, other testing equipment characteristics and function are not influenceed.
The device includes 2 three-phase voltage, three-phase current filtration modules, integrates, independently of other test equipments,
Easily access, there is the characteristics of small volume, light weight.In EMC test, the interference as produced by electromagnetic compatibility test equipment
Signal loading is in voltage circuit, to avoid interference signal through voltage circuit crosstalk source-side device, in source-side device and electromagnetism
Voltage filter is set between compatibility testing device.Interference signal may act on current loop by Device under test simultaneously, so as to right
Test power supply interferes, and therefore, while is filtered in current loop device current.
Embodiment 2：
As Figure 2-3, the present embodiment is preferably as follows on the basis of embodiment 1：Three-phase voltage filtration module includes 8
Gone here and there successively between the input and output end of differential mode inductance L1-L8,8 feedthrough capacitor C5-C12 and common mode inductance L, UA phase voltage
Connection connection differential mode inductance L1, common mode inductance L port 1, common mode inductance L port 2 and differential mode inductance L5, in differential mode inductance L1 and
Drop-down ground capacity C5 is set between common mode inductance L port 1, set between common mode inductance L port 2 and differential mode inductance L5
Pull down ground capacity C9；Differential mode inductance L2, common mode inductance L are sequentially connected in series between the input and output end of UB phase voltages
Port 3, common mode inductance L port 4 and differential mode inductance L6, drop-down is set between differential mode inductance L2 and common mode inductance L port 3
Ground capacity C6, drop-down ground capacity C10 is set between common mode inductance L port 4 and differential mode inductance L6；UC phase voltages it is defeated
Enter to be sequentially connected in series differential mode inductance L3, common mode inductance L port 5, common mode inductance L port 6 and poor between end and output end
Mould inductance L7, drop-down ground capacity C7 is set between differential mode inductance L3 and common mode inductance L port 5, at common mode inductance L end
Drop-down ground capacity C11 is set between 6 and differential mode inductance L7 of mouth；The company of being sequentially connected in series between the input and output end of UN phase voltages
Differential mode inductance L4, common mode inductance L port 7, common mode inductance L port 8 and differential mode inductance L8 are met, in differential mode inductance L4 and common mode
Drop-down ground capacity C8 is set between inductance L port 7, drop-down is set between common mode inductance L port 8 and differential mode inductance L8
Ground capacity C12.The parameter of feedthrough capacitor is 3300pF/2kV.Used in three-phase voltage filtration module circuit in this programme
EMI is filtered, and can so filter out the Conduction Interference to come on pressure-wire from Device under test, while differential mode inductance is by wire and is through
EMI on wire absorbs magnet ring and formed, and the EMI that this both ends are installed with absorbs magnet ring, and certain inhibitory action is played to DM EMI.
Three-phase voltage filtration module also includes 4 piezo-resistance R1-R4 and 4 high-voltage capacitance C1-C4, piezo-resistance R1's
Port 2 connects UA phase voltage inputs, other end ground connection；High-voltage capacitance C1 port 1 connects UA phase voltage inputs, another termination
Ground；Piezo-resistance R2 port 2 connects UB phase voltage inputs, other end ground connection；It is defeated that high-voltage capacitance C2 port 1 connects UB phase voltages
Enter end, other end ground connection；Piezo-resistance R3 port 2 connects UC phase voltage inputs, other end ground connection；High-voltage capacitance C3 port
1 connects UC phase voltage inputs, other end ground connection；Piezo-resistance R4 port 2 connects UN phase voltage inputs, other end ground connection；It is high
Voltage capacitance C4 port 1 connects UN phase voltage inputs, other end ground connection.In approaching side (UA, UB, UC and UN phase of interference signal
Voltage input end), each phase line prevents surge from puncturing the earth bridging high-voltage capacitance and piezo-resistance.
Every circuitry phase figure of three-phase current filtration module is identical, and A phase currents filtration module therein is pressure-sensitive including 2
Resistance R5-R6,2 high-voltage capacitance C13-C14,4 differential mode inductance L9-L12,4 feedthrough capacitor C15-C18, X electric capacity C19,2
Individual Y capacitance C20-C21 and common mode inductance L0, differential mode inductance is sequentially connected in series between the IA1+ ends of A phase currents and IA2+ ends
L9, common mode inductance L0 port 1, common mode inductance L0 port 2 and differential mode inductance L11, high-voltage capacitance C13 port 1 connect A phases
The IA1+ ends of electric current, other end ground connection；Piezo-resistance R5 port 2 connects the IA1+ ends of A phase currents, other end ground connection；Differential mode
Connection drop-down ground connection feedthrough capacitor C15 between inductance L9 and common mode inductance L0 port 1；Common mode inductance L0 port 2 and differential mode
Connection drop-down ground connection feedthrough capacitor C17 between inductance L11；It is sequentially connected in series between the IA3- ends of A phase currents and IA4- ends
Differential mode inductance L10, common mode inductance L0 port 3, common mode inductance L0 port 4 and differential mode inductance L12, high-voltage capacitance C14 end
Mouth 1 connects the IA3- ends of A phase currents, other end ground connection；Piezo-resistance R6 port 2 connects the IA3- ends of A phase currents, the other end
Ground connection；Connection drop-down ground connection feedthrough capacitor C16 between differential mode inductance L10 and common mode inductance L0 port 3；Common mode inductance L0 end
Connection drop-down ground connection feedthrough capacitor C18 between 4 and differential mode inductance L12 of mouth；In common mode inductance L0 port 1 and common mode inductance L0
Y capacitance C21 is also sequentially connected in series between port 3 and C20, X electric capacity are connected in parallel on the Y capacitance C21 and C20 both ends being connected in series.
The design principle of current filtering modular circuit is identical with voltage filter modular circuit.
Device filter range interference signal characteristic (frequency, voltage class) according to produced by EMC test uses only
Special voltage filtering circuit design and current filtering circuit design, can enter the hand-manipulating of needle to interference signal caused by EMC test
Property is filtered out.
Embodiment 3：
The present embodiment is preferably as follows on the basis of above-described embodiment：Each differential mode inductance includes the folded magnet ring and one of 5 strings
Root wire, wire pass through among the folded magnet ring of 5 strings.
Common mode inductance L includes two magnet rings and 0.5mm stacked2Yellow, green, red, black four kinds of colors 0.5mm2Lead
Line, the wire of four kinds of colors are wound on two magnet rings stacked parallel, and around 22 circles, coiling requirement is uniform, closely；Common mode
Inductance L0 includes two magnet rings and 4mm stacked2Red, black two kinds of colors wire, the wire of two kinds of colors is wound on
On two magnet rings stacked and two kinds of lead loop are in opposite direction, respectively require uniform close around 12 circles, coiling.
Differential mode inductance L1-L8 using HR6.8*15.3*4.2 magnet ring, differential mode inductance L9-L12 using
The long cartridge type EMI magnet rings of RH14.3*6.4*28.6 black.
Above-described embodiment, the purpose of this utility model, technical scheme and beneficial effect are entered
One step describes in detail, should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, it is all within the spirit and principles of the utility model, any modification for being made, equally replace
Change, improve, should be included within the scope of protection of the utility model.
Claims (7)
1. a kind of filter applied to EMC test, it is characterised in that including the three-phase electricity press filtration integrated
Ripple module and three-phase current filtration module, three-phase voltage filtration module and three-phase current filtration module filter mould by multi-stage bandpass
Block forms.
A kind of 2. filter applied to EMC test according to claim 1, it is characterised in that the three-phase
Voltage filter module includes the input of 8 differential mode inductance L1-L8,8 feedthrough capacitor C5-C12 and common mode inductance L, UA phase voltage
Differential mode inductance L1, common mode inductance L port 1, common mode inductance L port 2 and differential mode are sequentially connected in series between end and output end
Inductance L5, drop-down ground capacity C5 is set between differential mode inductance L1 and common mode inductance L port 1, in common mode inductance L port
Drop-down ground capacity C9 is set between 2 and differential mode inductance L5；It is sequentially connected in series between the input and output end of UB phase voltages
Differential mode inductance L2, common mode inductance L port 3, common mode inductance L port 4 and differential mode inductance L6, in differential mode inductance L2 and common mode electricity
Setting pulls down ground capacity C6 between feeling L port 3, is socketed under being set between common mode inductance L port 4 and differential mode inductance L6
Ground electric capacity C10；Differential mode inductance L3, common mode inductance L port are sequentially connected in series between the input and output end of UC phase voltages
5th, common mode inductance L port 6 and differential mode inductance L7, drop-down ground connection is set between differential mode inductance L3 and common mode inductance L port 5
Electric capacity C7, drop-down ground capacity C11 is set between common mode inductance L port 6 and differential mode inductance L7；The input of UN phase voltages
Differential mode inductance L4, common mode inductance L port 7, common mode inductance L port 8 and differential mode electricity are sequentially connected in series between output end
Feel L8, drop-down ground capacity C8 is set between differential mode inductance L4 and common mode inductance L port 7, in common mode inductance L port 8
Drop-down ground capacity C12 is set between differential mode inductance L8.
3. a kind of filter applied to EMC test according to claim 1 or 2, it is characterised in that described
Three-phase voltage filtration module also includes 4 piezo-resistance R1-R4 and 4 high-voltage capacitance C1-C4, piezo-resistance R1 port 2 connect
UA phase voltage inputs, other end ground connection；High-voltage capacitance C1 port 1 connects UA phase voltage inputs, other end ground connection；Pressure-sensitive electricity
Resistance R2 port 2 connects UB phase voltage inputs, other end ground connection；High-voltage capacitance C2 port 1 connects UB phase voltage inputs, another
End ground connection；Piezo-resistance R3 port 2 connects UC phase voltage inputs, other end ground connection；High-voltage capacitance C3 port 1 connects UC phases electricity
Press input, other end ground connection；Piezo-resistance R4 port 2 connects UN phase voltage inputs, other end ground connection；High-voltage capacitance C4's
Port 1 connects UN phase voltage inputs, other end ground connection.
A kind of 4. filter applied to EMC test according to claim 3, it is characterised in that the three-phase
Every circuitry phase figure of current filtering module is identical, and A phase currents filtration module therein includes 2 piezo-resistance R5-R6,2
Individual high-voltage capacitance C13-C14,4 differential mode inductance L9-L12,4 feedthrough capacitor C15-C18, X electric capacity C19,2 Y capacitance C20-
C21 and common mode inductance L0, differential mode inductance L9, common mode inductance are sequentially connected in series between the IA1+ ends of A phase currents and IA2+ ends
The port 1 of L0 port 1, common mode inductance L0 port 2 and differential mode inductance L11, high-voltage capacitance C13 connects the IA1+ of A phase currents
End, other end ground connection；Piezo-resistance R5 port 2 connects the IA1+ ends of A phase currents, other end ground connection；Differential mode inductance L9 and altogether
Connection drop-down ground connection feedthrough capacitor C15 between mould inductance L0 port 1；Between common mode inductance L0 port 2 and differential mode inductance L11
Connection drop-down ground connection feedthrough capacitor C17；Be sequentially connected in series between the IA3- ends of A phase currents and IA4- ends differential mode inductance L10,
The port 1 of common mode inductance L0 port 3, common mode inductance L0 port 4 and differential mode inductance L12, high-voltage capacitance C14 connects A phases electricity
The IA3- ends of stream, other end ground connection；Piezo-resistance R6 port 2 connects the IA3- ends of A phase currents, other end ground connection；Differential mode electricity
Connection drop-down is grounded feedthrough capacitor C16 between feeling L10 and common mode inductance L0 port 3；Common mode inductance L0 port 4 and differential mode electricity
Connection drop-down is grounded feedthrough capacitor C18 between feeling L12；Between common mode inductance L0 port 1 and common mode inductance L0 port 3 also
It is sequentially connected in series Y capacitance C21 and C20, X electric capacity is connected in parallel on the Y capacitance C21 and C20 both ends being connected in series.
A kind of 5. filter applied to EMC test according to claim 4, it is characterised in that each differential mode
Inductance includes 5 folded magnet rings of string and a wire, and wire passes through among the folded magnet ring of 5 strings.
A kind of 6. filter applied to EMC test according to claim 4, it is characterised in that common mode inductance
L includes two magnet rings stacked and the wire of four kinds of colors, and the wire of four kinds of colors is wound on two and stacked parallel
Magnet ring on；Common mode inductance L0 includes two magnet rings stacked and the wire of two kinds of colors, the wire coiling of two kinds of colors
On the magnet ring that two stack and two kinds of lead loop are in opposite direction.
A kind of 7. filter applied to EMC test according to claim 4, it is characterised in that differential mode inductance
L1-L8 is using HR6.8*15.3*4.2 magnet ring, and differential mode inductance L9-L12 is using long cartridge type EMI magnet rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720886317.9U CN206945859U (en) | 2017-07-20 | 2017-07-20 | A kind of filter applied to EMC test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720886317.9U CN206945859U (en) | 2017-07-20 | 2017-07-20 | A kind of filter applied to EMC test |
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| Publication Number | Publication Date |
|---|---|
| CN206945859U true CN206945859U (en) | 2018-01-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111487546A (en) * | 2020-04-23 | 2020-08-04 | 重庆长安汽车股份有限公司 | Electromagnetic interference simulation test system and method |
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2017
- 2017-07-20 CN CN201720886317.9U patent/CN206945859U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111487546A (en) * | 2020-04-23 | 2020-08-04 | 重庆长安汽车股份有限公司 | Electromagnetic interference simulation test system and method |
| CN111487546B (en) * | 2020-04-23 | 2022-09-06 | 重庆长安汽车股份有限公司 | Electromagnetic interference simulation test system and method |
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