CN209267444U - A kind of specific aim inhibits the switch power supply EMI filter of narrow band spectrum - Google Patents
A kind of specific aim inhibits the switch power supply EMI filter of narrow band spectrum Download PDFInfo
- Publication number
- CN209267444U CN209267444U CN201822187305.4U CN201822187305U CN209267444U CN 209267444 U CN209267444 U CN 209267444U CN 201822187305 U CN201822187305 U CN 201822187305U CN 209267444 U CN209267444 U CN 209267444U
- Authority
- CN
- China
- Prior art keywords
- multifrequency
- power supply
- resonant branch
- branch
- resonant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Filters And Equalizers (AREA)
Abstract
The utility model discloses a kind of specific aims, and the switch power supply EMI filter of narrow band spectrum to be inhibited to be wound with magnet ring induction coil L in high-frequency magnetic including the high-frequency magnetic being socketed on Switching Power Supply power supply line Lg, magnet ring induction coil LgOn be connected with resonant element group.The utility model not only can significantly reduce the volume and power consumption of electromagnetic interface filter, it is often more important that can be realized the targeted inhibition of EMI interference specialized narrowband frequency spectrum.
Description
Technical field
The utility model belongs to Switching Power Supply electromagnetism compatible technique field, is related to a kind of opening for specific aim inhibition narrow band spectrum
Close EMI power filter.
Background technique
Switching Power Supply successfully ascends power electronic technique row instantly because of its feature light-weight, small in size, high-efficient
The most popular research field of industry, but go deep into research, electromagnetic interference problem therein is also more and more prominent, especially conducts
EMI is very serious.Electromagnetic interface filter is the classical equipment for inhibiting Conducted Electromagnetic Interference, and traditional passive electromagnetic interface filter is by being connected on
The filtering mode that inductance and capacitor in the line in parallel in route are formed, not only volume is big for this filter, power consumption is big, and
And for the narrow band spectrum poor selectivity of electromagnetic interference frequency spectrum.Based on this, the utility model proposes a kind of specific aims to inhibit narrowband
The switch power supply EMI filter of frequency spectrum, which, which has broken, actually docks EMI filter circuit in Switching Power Supply power supply line
Mode, electromagnetic interference is sensed on magnet ring induction coil by a high-frequency magnetic, in magnet ring induction coil concatenate it is more
Frequency resonant branch mode realizes the specific aim inhibition to electromagnetic interference narrow band spectrum.This electromagnetic interface filter not only can significantly subtract
The volume and power consumption of small electromagnetic interface filter, it is often more important that can be realized the targeted suppression of EMI interference specialized narrowband frequency spectrum
System.
Utility model content
The purpose of the utility model is to provide the switch power supply EMI filter that a kind of specific aim inhibits narrow band spectrum, the EMI
Filter not only can significantly reduce the volume and power consumption of electromagnetic interface filter, it is often more important that can be realized EMI interference specialized narrowband
The targeted inhibition of frequency spectrum.
The utility model is the technical scheme adopted is that a kind of specific aim inhibits the switch power supply EMI filtering of narrow band spectrum
Device is wound with magnet ring induction coil L including the high-frequency magnetic being socketed on Switching Power Supply power supply line L in high-frequency magneticg, magnetic
Ring induction coil LgOn be connected with resonant element group.
The utility model is also characterized by
Switching Power Supply power supply line L has electric current I to pass through, magnet ring induction coil LgThe electricity flowed through in high-frequency magnetic can be absorbed
Conducted EMI caused by I is flowed, resonant element group can generate multiple cutoff frequencies under different resonant states, thus
The electromagnetic interference of different frequency range is effectively inhibited.
Resonant element group includes three groups of resonant branch, respectively resonant branch I, resonant branch II and resonant branch III, humorous
Shake branch I, resonant branch II and resonant branch III respectively with magnet ring induction coil LgSeries connection.
Resonant branch I includes sequentially connected multifrequency resonant branch inductance L1, multifrequency resonant branch capacitor C1, multifrequency resonance
Branch accesses power consumption resistance R1, multifrequency resonant branch inductance L1Power consumption resistance R is accessed with multifrequency resonant branch1It is connected to magnetic
Ring induction coil LgBoth ends.
Resonant branch II includes sequentially connected multifrequency resonant branch inductance L2, multifrequency resonant branch capacitor C2, multifrequency resonance
Branch accesses power consumption resistance R2, multifrequency resonant branch inductance L2Power consumption resistance R is accessed with multifrequency resonant branch2It is connected to magnetic
Ring induction coil LgBoth ends.
Resonant branch III includes sequentially connected multifrequency resonant branch inductance L3, multifrequency resonant branch capacitor C3, multifrequency it is humorous
The branch that shakes accesses power consumption resistance R3；Multifrequency resonant branch inductance L3Power consumption resistance R is accessed with multifrequency resonant branch3It is connected to
Magnet ring induction coil LgBoth ends.
The utility model has the beneficial effects that the filter apparatus in the utility model solves traditional passive EMI filter
Wave body product is big, power consumption is big, and the problem of the specialized narrowband spectral selectivity difference for electromagnetic interference frequency spectrum, meanwhile, the filter
Wave device has broken the filter patterns that EMI filter circuit is actually docked in Switching Power Supply power supply line, passes through a high-frequency magnetic
Electromagnetic interference is sensed on magnet ring induction coil, the mode that multifrequency resonant branch is concatenated in magnet ring induction coil is realized to electricity
The targeted inhibition of magnetic disturbance specialized narrowband frequency spectrum.Also, it is unalterable for already installed structure medium-and-large-sized
Switch power supply equipment, the EMI filtering mode can not only guarantee the convenience of filter installation, more can targetedly inhibit super
Target narrowband electromagnetic interference frequency spectrum.
Detailed description of the invention
A kind of specific aim of Fig. 1 the utility model inhibits the circuit topology figure of the switch power supply EMI filter of narrow band spectrum.
In figure, 1. Switching Power Supply power supply line L, 2. high-frequency magnetics, 3. magnet ring induction coil Lg, 4. resonant branch I, 5. is humorous
Shake branch II, 6. resonant branch III.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
A kind of specific aim of the utility model inhibits the switch power supply EMI filter of narrow band spectrum, as shown in Figure 1, the device
Electromagnetic interference is sensed magnet ring induction coil L by a high-frequency magnetic 2gOn 3, in magnet ring induction coil Lg3 concatenation multifrequencies
Resonant branch mode realizes the targeted inhibition to electromagnetic interference specialized narrowband frequency spectrum.In multifrequency resonant branch, every group humorous
Vibration branch includes multifrequency resonant branch inductance, multifrequency resonant branch capacitor and multifrequency resonant branch access power consumption resistance.This EMI
Filter not only can significantly reduce the volume and power consumption of electromagnetic interface filter, it is often more important that can be realized EMI interference specialized narrowband
The targeted inhibition of frequency spectrum.Solve that traditional passive electromagnetic interface filter volume is big, power consumption is big, and for electromagnetic interference
The problem of narrow band spectrum poor selectivity of frequency spectrum, meanwhile, which has broken actually docks in Switching Power Supply power supply line
Electromagnetic interference is sensed magnet ring induction coil L by a high-frequency magnetic by the mode of EMI filter circuitgOn 3, for
The mounted unalterable medium-and-large-sized Switching Power Supply of structure, the EMI filtering mode fill just after can not only guaranteeing filter
Victory more can targetedly inhibit exceeded narrowband electromagnetic interference frequency spectrum.
A kind of specific aim of the utility model inhibits the switch power supply EMI filter of narrow band spectrum, from fig. 1, it can be seen that filter
2 sets of high-frequency magnetic on Switching Power Supply power supply line L 1, Switching Power Supply power supply line L 1 has electric current I to pass through, high frequency magnetic
Magnet ring induction coil L on ring 2g3 can absorb conducted EMI caused by the electric current I flowed through in high-frequency magnetic 2, magnetic
Ring induction coil Lg3 are connected with resonant element group, and resonant element group can generate multiple cutoff frequencies under different resonant states
Rate, so that the electromagnetic interference to different frequency range is effectively inhibited.
Magnet ring induction coil L in figureg3 are connected with three groups of resonant branch, and resonant branch I4 includes multifrequency resonant branch electricity
Feel L1, multifrequency resonant branch capacitor C1, multifrequency resonant branch access power consumption resistance R1；Multifrequency resonant branch inductance L1It is humorous with multifrequency
The branch that shakes accesses power consumption resistance R1It is connected to magnet ring induction coil LgBoth ends.
Resonant branch II5 includes sequentially connected multifrequency resonant branch inductance L2, multifrequency resonant branch capacitor C2, multifrequency it is humorous
The branch that shakes accesses power consumption resistance R2；Multifrequency resonant branch inductance L2Power consumption resistance R is accessed with multifrequency resonant branch2It is connected to
Magnet ring induction coil LgBoth ends.
Resonant branch III6 includes sequentially connected multifrequency resonant branch inductance L3, multifrequency resonant branch capacitor C3, multifrequency it is humorous
The branch that shakes accesses power consumption resistance R3.Multifrequency resonant branch inductance L3Power consumption resistance R is accessed with multifrequency resonant branch3It is connected to
Magnet ring induction coil LgBoth ends.
Three groups of resonant branch and magnet ring induction coil Lg3 are serially connected.By adjusting element in each resonant branch
Parameter value can design different cutoff frequencies, to targetedly inhibit for the actual demand in different operating conditions
Exceeded narrowband electromagnetic interference frequency spectrum.
Claims (6)
1. the switch power supply EMI filter that a kind of specific aim inhibits narrow band spectrum, it is characterised in that: including being socketed in Switching Power Supply
High-frequency magnetic on power supply line L is wound with magnet ring induction coil L in high-frequency magneticg, magnet ring induction coil LgOn be connected with it is humorous
Vibration element group.
2. a kind of specific aim according to claim 1 inhibits the switch power supply EMI filter of narrow band spectrum, feature exists
In: the Switching Power Supply power supply line L has electric current I to pass through, magnet ring induction coil LgThe electricity flowed through in high-frequency magnetic can be absorbed
Conducted EMI caused by I is flowed, resonant element group can generate multiple cutoff frequencies under different resonant states, thus
The electromagnetic interference of different frequency range is effectively inhibited.
3. a kind of specific aim according to claim 1 inhibits the switch power supply EMI filter of narrow band spectrum, feature exists
It include three groups of resonant branch in: the resonant element group, respectively resonant branch I, resonant branch II and resonant branch III are humorous
Shake branch I, resonant branch II and resonant branch III respectively with magnet ring induction coil LgSeries connection.
4. a kind of specific aim according to claim 3 inhibits the switch power supply EMI filter of narrow band spectrum, feature exists
In: the resonant branch I includes sequentially connected multifrequency resonant branch inductance L1, multifrequency resonant branch capacitor C1, multifrequency resonance branch
Power consumption resistance R is accessed on road1, multifrequency resonant branch inductance L1Power consumption resistance R is accessed with multifrequency resonant branch1It is connected to magnet ring
Induction coil LgBoth ends.
5. a kind of specific aim according to claim 3 inhibits the switch power supply EMI filter of narrow band spectrum, feature exists
In: the resonant branch II includes sequentially connected multifrequency resonant branch inductance L2, multifrequency resonant branch capacitor C2, multifrequency resonance
Branch accesses power consumption resistance R2, multifrequency resonant branch inductance L2Power consumption resistance R is accessed with multifrequency resonant branch2It is connected to magnetic
Ring induction coil LgBoth ends.
6. a kind of specific aim according to claim 3 inhibits the switch power supply EMI filter of narrow band spectrum, feature exists
In: the resonant branch III includes sequentially connected multifrequency resonant branch inductance L3, multifrequency resonant branch capacitor C3, multifrequency resonance
Branch accesses power consumption resistance R3；Multifrequency resonant branch inductance L3Power consumption resistance R is accessed with multifrequency resonant branch3It is connected to magnetic
Ring induction coil LgBoth ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822187305.4U CN209267444U (en) | 2018-12-25 | 2018-12-25 | A kind of specific aim inhibits the switch power supply EMI filter of narrow band spectrum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822187305.4U CN209267444U (en) | 2018-12-25 | 2018-12-25 | A kind of specific aim inhibits the switch power supply EMI filter of narrow band spectrum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209267444U true CN209267444U (en) | 2019-08-16 |
Family
ID=67561637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822187305.4U Active CN209267444U (en) | 2018-12-25 | 2018-12-25 | A kind of specific aim inhibits the switch power supply EMI filter of narrow band spectrum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209267444U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946433A (en) * | 2021-01-29 | 2021-06-11 | 云南电网有限责任公司电力科学研究院 | Cubical switchboard partial discharge signal prevents diffusion equipment |
-
2018
- 2018-12-25 CN CN201822187305.4U patent/CN209267444U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946433A (en) * | 2021-01-29 | 2021-06-11 | 云南电网有限责任公司电力科学研究院 | Cubical switchboard partial discharge signal prevents diffusion equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209267444U (en) | A kind of specific aim inhibits the switch power supply EMI filter of narrow band spectrum | |
| CN207250299U (en) | A kind of winding structure of common mode inductance | |
| CN201039660Y (en) | Filter and its casing | |
| CN203300366U (en) | Common-mode filter inductor | |
| CN207542776U (en) | A kind of surge protector for inhibiting electrical fast transient (eft) | |
| CN202258647U (en) | Common mode choke | |
| CN203278630U (en) | Power supply filter of high-voltage heavy current shield | |
| CN105931817A (en) | Shipborne 12-pulse rectifier transformer applied to ship power system | |
| CN207070030U (en) | The power-supply filter that a kind of differential mode and common mode coexist | |
| CN104702234B (en) | A kind of EMI FILTER suitable for high pressure Hall voltage sensor | |
| CN205810511U (en) | A kind of common mode inductance | |
| CN203734632U (en) | Electromagnetic interference filter suitable for high voltage Hall voltage sensor | |
| CN205407757U (en) | EMI wave filter of electric power automation equipment | |
| CN203554279U (en) | Novel filtering board | |
| CN202996476U (en) | Stacked staggered winding based planar EMI (electro-magnetic interference) filter | |
| CN108923764A (en) | A kind of filter | |
| CN103035361A (en) | Common mode inductor | |
| CN210693702U (en) | Filter for pitching azimuth motor | |
| CN207474188U (en) | It is a kind of can harmonic carcellation magnetic shunt path transformer | |
| CN207283510U (en) | A kind of filtering system, the electric appliance and electromagnetic oven with filtering system | |
| CN207302830U (en) | A kind of anti-short-circuit common mode inductance | |
| CN208460936U (en) | A kind of single phase poaer supply filter | |
| CN202977131U (en) | High-impedance differential mode inductor | |
| CN208706363U (en) | A kind of common mode inductance | |
| CN104702096B (en) | The design method of digital active EMI filtering systems and decoupling circuit containing decoupling circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |