CN208337408U - A kind of ultra-wideband EMC power-supply filter - Google Patents
A kind of ultra-wideband EMC power-supply filter Download PDFInfo
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- CN208337408U CN208337408U CN201821161335.1U CN201821161335U CN208337408U CN 208337408 U CN208337408 U CN 208337408U CN 201821161335 U CN201821161335 U CN 201821161335U CN 208337408 U CN208337408 U CN 208337408U
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Abstract
The utility model discloses a kind of ultra-wideband EMC power-supply filters, including firewire L, zero curve N and ground wire GND, the input terminal of the firewire L, zero curve N and ground wire GND are connected to EMC high-frequency magnetic L1, the output end of EMC high-frequency magnetic L1 has been sequentially connected in series common mode inductance L3 and common mode inductance L4 on firewire L and zero curve N, and low frequency differences mould inductance L2 is connected between the EMC high-frequency magnetic L1 output end on firewire L and common mode inductance L3 input terminal.This ultra-wideband EMC power-supply filter can play extraordinary EMC filter effect for the frequency of 50MHz or more by increasing EMC high-frequency magnetic L1；Increase low frequency differential mode inductance L2 made of level-one low frequency magnetic core materials on firewire L, can effectively remove the EMC interference signal within the scope of 9KHZ~150KHz；Ultra-wideband EMC power-supply filter frequency range is wider, can replace filters all at present, expand workable field, after installing ultra-wideband EMC power-supply filter, can effectively reduce other EMC components in product.
Description
Technical field
The utility model relates to EMC wave filter technology field, specially a kind of ultra-wideband EMC power-supply filter.
Background technique
The filter circuit that traditional AC power supplies filter is made of capacitor, inductance and resistance, also known as " power supply EMI filtering
Device ", or " EMI power-supply filter ", a kind of passive bidirectional network, its one end are power supplys, and the other end is load.Power filter
The principle of device is exactly a kind of --- and impedance network: the impedance of power-supply filter input, outlet side and power supply and load-side is suitable
It is more effective to the decaying of electromagnetic interference with bigger.Filter can frequency point to specific frequency in power supply line or the frequency point with
Outer frequency is effectively filtered out, and the power supply signal of a specific frequency is obtained, or eliminates the power supply letter after a specific frequency
Number
As national sector standard is more and more perfect, execution is increasingly stringenter, also higher and higher to the technical requirements of product；
The frequency range of traditional AC power supplies filter can effectively play EMI filter action in 150KHz~30MHz, for
The EMI interference signal of 200KHZ signal below, the especially signal of 9KHZ and 50MHZ or more is almost without any
Effect and effect；Therefore in electronics, electric appliance etc. product, very effective EMI can not be played lower than the frequency of 150KHz
Filter action, higher than in the frequency of 50MHz or more also without good EMI filter effect；In view of this, therefore proposing a kind of super
Wideband EMC power-supply filter.
Utility model content
The purpose of this utility model is to provide a kind of ultra-wideband EMC power-supply filters, have frequency range wide, expand
Using field, the advantages of effectively reducing other EMC components in product, solves the frequency of AC power supplies filter in the prior art
Rate narrow, the small problem of workable field limitation.
To achieve the above object, the utility model provides the following technical solutions: a kind of ultra-wideband EMC power-supply filter, packet
The input terminal for including firewire L, zero curve N and ground wire GND, the firewire L, zero curve N and ground wire GND is connected to EMC high-frequency magnetic L1, fire
The output end of EMC high-frequency magnetic L1 has been sequentially connected in series common mode inductance L3 and common mode inductance L4 on line L and zero curve N, on firewire L
EMC high-frequency magnetic on low frequency differences mould inductance L2, firewire L is connected between EMC high-frequency magnetic L1 output end and common mode inductance L3 input terminal
The output terminating resistor R1 and resistance R3 of L1 connect the output end of EMC high-frequency magnetic L1 on zero curve N, the both ends of resistance R1 and resistance R3
And the input terminal of the output terminating resistor R4 of connecting resistance R2 and resistance R4, resistance R1, the both ends of resistance R2 and resistance R4 simultaneously connect electricity
Hold C1；The output termination capacitor C2 of the low frequency differential mode inductance L2 connects the input terminal of common mode inductance L3 on zero curve N, on firewire L
Common mode inductance L3 output termination capacitor Y1 and capacitor Y2 connects the output end of common mode inductance L3 on zero curve N, capacitor Y1 and capacitor Y2's
The output end of EMC high-frequency magnetic L1 on the output end ground line GND of both ends shunt-wound capacitance C3, capacitor Y1；Common mode on the firewire L
Inductance L4 output termination capacitor Y3 and capacitor Y4 connects the output end of common mode inductance L4 on zero curve N, the both ends of capacitor Y3 and capacitor Y4
The output end of EMC high-frequency magnetic L1 on the output end ground line GND of shunt-wound capacitance C4, capacitor Y3.
Preferably, the low frequency differential mode inductance L2 is made of ultra low frequency magnetic core material, and core material mainly uses MPP
CORES iron nickel molybdenum magnetic core and sendust core.
Preferably, the voltage of the firewire L and zero curve N access is AC95V~265V/50Hz.
Compared with prior art, the beneficial effects of the utility model are as follows:
This ultra-wideband EMC power-supply filter, by increasing level-one EMC high jointly on firewire L, zero curve N and ground wire GND
Frequency magnet ring L1 can play extraordinary EMC filter effect for the frequency of 50MHz or more；Increase level-one low frequency on firewire L
Low frequency differential mode inductance L2 made of core material, core material mainly use MPP CORES iron nickel molybdenum magnetic core and sendust core,
The EMC interference signal within the scope of 9KHZ~150KHz can effectively be removed；Ultra-wideband EMC power-supply filter uses low frequency differences
Mould inductance L2, can be effective the EMI interference signal of removal 9KHZ~150KHz, using EMC high-frequency magnetic L1 can be to 50MHz
Above frequency plays extraordinary EMC filter effect, therefore ultra-wideband EMC power-supply filter frequency range is wider, can replace
Filters all at present is changed, expands workable field, various electronics, electric appliance, communication, medical treatment etc. product can make
With, after ultra-wideband EMC power-supply filter is installed, can effectively reduce other EMC components in product, as magnet ring, EMI press from both sides
Button etc. EMI component.
Detailed description of the invention
Fig. 1 is the integrated circuit figure of the utility model；
Fig. 2 is the scheme of installation of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
A kind of ultra-wideband EMC power-supply filter referring to FIG. 1-2, including firewire L, zero curve N and ground wire GND, firewire L and
The voltage of zero curve N access is AC95V~265V/50Hz, and the input terminal of firewire L, zero curve N and ground wire GND are connected to EMC high frequency magnetic
The output end of EMC high-frequency magnetic L1 has been sequentially connected in series common mode inductance L3 and common mode inductance L4 on ring L1, firewire L and zero curve N, fire
Low frequency differences mould inductance L2, low frequency differential mode inductance are connected between EMC high-frequency magnetic L1 output end on line L and common mode inductance L3 input terminal
L2 is made of ultra low frequency magnetic core material, and core material mainly uses MPP CORES iron nickel molybdenum magnetic core and sendust core, firewire
The output terminating resistor R1 and resistance R3 of the upper EMC high-frequency magnetic L1 of L meet the output end of EMC high-frequency magnetic L1 on zero curve N, resistance R1
Both ends and connecting resistance R2 and resistance R4 with resistance R3, the input terminal of the output terminating resistor R4 of resistance R1, resistance R2 and resistance
The both ends shunt-wound capacitance C1 of R4；The output termination capacitor C2 of low frequency differential mode inductance L2 connects the input terminal of common mode inductance L3 on zero curve N,
Common mode inductance L3 output termination capacitor Y1 and capacitor Y2 on firewire L connects the output end of common mode inductance L3 zero curve N on, capacitor Y1 with
The output end of EMC high-frequency magnetic L1 on the output end ground line GND of the both ends shunt-wound capacitance C3 of capacitor Y2, capacitor Y1；On firewire L
Common mode inductance L4 output termination capacitor Y3 and capacitor Y4 connects the output end of common mode inductance L4 on zero curve N, capacitor Y3 and capacitor Y4's
The output end of EMC high-frequency magnetic L1 on the output end ground line GND of both ends shunt-wound capacitance C4, capacitor Y3.
Ultra-wideband EMC power-supply filter increases level-one EMC high frequency magnetic jointly on firewire L, zero curve N and ground wire GND
Ring L1 can play extraordinary EMC filter effect mainly for the frequency of 50MHz or more；Increase level-one low frequency on firewire L
Low frequency differential mode inductance L2 made of core material, core material mainly use MPP CORES iron nickel molybdenum magnetic core and sendust core,
Be mainly characterized by: for saturation induction density value in 7500Gs or so, permeability range is big, is lost low, and temperature stability is good, can be with
There is extraordinary EMI characteristic in 8KHz~300KHz, is made into low frequency differential mode inductance L2 using such magnetic material, it can be effective
Removal 9KHZ~150KHz within the scope of EMC interference signal, the frequency range of traditional AC power supplies filter 150KHz~
30MHz can effectively play EMI filter action, can because ultra-wideband EMC power-supply filter uses low frequency differential mode inductance L2
The effectively EMI interference signal of removal 9KHZ~150KHz can play the frequency of 50MHz or more using EMC high-frequency magnetic L1
To extraordinary EMC filter effect, therefore ultra-wideband EMC power-supply filter frequency range is wider, can replace all at present
Filter expands workable field, and various electronics, electric appliance, communication, medical treatment etc. product can be used, and installs the ultra-wide
After frequency EMC power-supply filter, other EMC components in product, such as magnet ring, EMI clip EMI member device can be effectively reduced
Part.
In summary: this ultra-wideband EMC power-supply filter, by being increased jointly on firewire L, zero curve N and ground wire GND
Level-one EMC high-frequency magnetic L1 can play extraordinary EMC filter effect for the frequency of 50MHz or more；Increase on firewire L
Add low frequency differential mode inductance L2 made of level-one low frequency magnetic core materials, core material mainly use MPP CORES iron nickel molybdenum magnetic core and
Sendust core can effectively remove the EMC interference signal within the scope of 9KHZ~150KHz；Ultra-wideband EMC power filter
Device uses low frequency differential mode inductance L2, can be effective the EMI interference signal of removal 9KHZ~150KHz, using EMC high-frequency magnetic
L1 can play extraordinary EMC filter effect to the frequency of 50MHz or more, therefore ultra-wideband EMC power-supply filter frequency model
Filters all at present can more extensively be replaced by enclosing, and expand workable field, various electronics, electric appliance, communication, medical treatment etc.
Equal products can be used, and after installing ultra-wideband EMC power-supply filter, can effectively reduce other EMC components in product,
Such as magnet ring, EMI clip EMI component.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (3)
1. a kind of ultra-wideband EMC power-supply filter, including firewire L, zero curve N and ground wire GND, it is characterised in that: the firewire L,
The input terminal of zero curve N and ground wire GND are connected to the output end of EMC high-frequency magnetic L1 on EMC high-frequency magnetic L1, firewire L and zero curve N
It is sequentially connected in series common mode inductance L3 and common mode inductance L4, the EMC high-frequency magnetic L1 output end and common mode inductance L3 on firewire L are defeated
The output terminating resistor R1 and resistance R3 for entering to be connected to EMC high-frequency magnetic L1 on low frequency differences mould inductance L2, firewire L between holding meet zero curve N
The both ends of the output end of upper EMC high-frequency magnetic L1, resistance R1 and resistance R3 and connecting resistance R2 and resistance R4, the output end of resistance R1
The both ends shunt-wound capacitance C1 of the input terminal of connecting resistance R4, resistance R2 and resistance R4；The output of the low frequency differential mode inductance L2 terminates
Capacitor C2 connects the input terminal of common mode inductance L3 on zero curve N, and the common mode inductance L3 output termination capacitor Y1 and capacitor Y2 on firewire L connects
The output end of the both ends shunt-wound capacitance C3 of the output end of common mode inductance L3 on zero curve N, capacitor Y1 and capacitor Y2, capacitor Y1 are grounded
The output end of the upper EMC high-frequency magnetic L1 of GND；Common mode inductance L4 exports termination capacitor Y3 and capacitor Y4 and meets zero curve N on the firewire L
On the output end ground line GND of the both ends shunt-wound capacitance C4 of the output end of upper common mode inductance L4, capacitor Y3 and capacitor Y4, capacitor Y3
The output end of EMC high-frequency magnetic L1.
2. a kind of ultra-wideband EMC power-supply filter according to claim 1, it is characterised in that: the low frequency differential mode inductance
L2 is made of ultra low frequency magnetic core material, and core material mainly uses MPP CORES iron nickel molybdenum magnetic core and sendust core.
3. a kind of ultra-wideband EMC power-supply filter according to claim 1, it is characterised in that: the firewire L and zero curve N
The voltage of access is AC95V~265V/50Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821161335.1U CN208337408U (en) | 2018-07-20 | 2018-07-20 | A kind of ultra-wideband EMC power-supply filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821161335.1U CN208337408U (en) | 2018-07-20 | 2018-07-20 | A kind of ultra-wideband EMC power-supply filter |
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| CN208337408U true CN208337408U (en) | 2019-01-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233580A (en) * | 2019-07-08 | 2019-09-13 | 广州市凯辉电子有限公司 | A kind of high power constant compresses switch power supply |
| CN110970694A (en) * | 2019-12-27 | 2020-04-07 | 浙江飞碟汽车制造有限公司 | Direct current end parallel type simplified filter |
| CN113452241A (en) * | 2021-06-17 | 2021-09-28 | 珠海格力电器股份有限公司 | Common mode interference suppression device and frequency conversion electrical apparatus |
-
2018
- 2018-07-20 CN CN201821161335.1U patent/CN208337408U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233580A (en) * | 2019-07-08 | 2019-09-13 | 广州市凯辉电子有限公司 | A kind of high power constant compresses switch power supply |
| CN110970694A (en) * | 2019-12-27 | 2020-04-07 | 浙江飞碟汽车制造有限公司 | Direct current end parallel type simplified filter |
| CN113452241A (en) * | 2021-06-17 | 2021-09-28 | 珠海格力电器股份有限公司 | Common mode interference suppression device and frequency conversion electrical apparatus |
| CN113452241B (en) * | 2021-06-17 | 2022-08-16 | 珠海格力电器股份有限公司 | Common mode interference suppression device and frequency conversion electrical apparatus |
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