CN205847083U - EMC filter circuit and electromagnetism stove - Google Patents
EMC filter circuit and electromagnetism stove Download PDFInfo
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- CN205847083U CN205847083U CN201620793037.9U CN201620793037U CN205847083U CN 205847083 U CN205847083 U CN 205847083U CN 201620793037 U CN201620793037 U CN 201620793037U CN 205847083 U CN205847083 U CN 205847083U
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Abstract
The utility model provides an EMC filter circuit and electromagnetism stove, wherein, EMC filter circuit includes: interconnect's first filtering unit and common mode inductance, the input and the alternating current power supply of first filtering unit are connected, and common mode inductance is connected with the alternating current-direct current conversion unit, utilizes interference signal among the first filtering unit filtering electronic equipment, the common mode interference signal among the common mode inductance filtering electronic equipment, has effectively suppressed the electromagnetic interference among the electronic equipment, moreover, the technical scheme of the utility model not need the magnetic ring among, solved need artifically among the prior art with the power cord around put the problem that the degree of mechanization that brings on the magnetic ring is low, the electromagnetic interference suppression effect is poor.
Description
Technical field
This utility model relates to circuit structure technical field, particularly relates to a kind of Electro Magnetic Compatibility EMC filter circuit and electricity
Magnetic stove.
Background technology
Electromagnetic oven has another name called electromagnetic stove, is the product of modern kitchen revolution, and it heats without naked light or conduction-type and make heat straight
Being connected on the bottom of a pan to produce, therefore the thermal efficiency is greatly improved.Along with development and the requirement of domestic standard, electromagnetic oven product
Electro Magnetic Compatibility (Electro Magnetic Compatibility is called for short EMC) has to comply with the national standard of EMC.
At present, in order to by the national standard of EMC, existing electromagnetic oven generally be come real by the most sheathed magnet ring
Existing, this magnet ring is one piece of ring-type magnetic conductor.In actual applications, by being manually wound on magnet ring by power line, magnet ring is utilized
The characteristic absorbing magnetic suppresses the high-frequency noise of electronic circuit.Generally, on magnet ring around the power line number of turn the most, right
The inhibition of electronic circuit high-frequency noises is the best, that is, can be one by manually adjusting the power line number of turn on magnet ring
Determine to suppress in degree the electromagnetic interference of power supply so that the EMC of electromagnetic oven product meets national standard.
But, in above-mentioned existing electromagnetic oven, need artificial by power line around the home on magnet ring, waste time and energy, mechanization
Degree is low, the weak effect of electromagnetic interference in suppression electromagnetic oven.
Utility model content
In order to solve at least one problem mentioned in background technology, this utility model provide a kind of EMC filter circuit and
Electromagnetic oven, utilizes the first filter unit and common mode inductance effectively to inhibit the electromagnetic interference in electronic equipment, and mechanization degree is high,
Suppress the effective of electromagnetic interference.
This utility model first aspect provides a kind of Electro Magnetic Compatibility EMC filter circuit, including: interconnective first filter
Ripple unit and common mode inductance, the input of described first filter unit is connected with alternating current power supply, the outfan of described common mode inductance
It is connected with AC-DC conversion unit；
Described first filter unit is for filtering the interference signal in electronic equipment, and described common mode inductance is used for filtering described
Common mode interference signal in electronic equipment.
The EMC filter circuit that this utility model provides, is connected to interconnective first filter unit and common mode inductance
Between alternating current power supply and AC-DC conversion unit, the EMC filter circuit of the first filter unit and common mode inductance composition is utilized to filter
Except the electromagnetic interference in electronic equipment, it is not necessary to self-made components such as magnet rings, improve the mechanization degree of EMC filter circuit, suppression
Electromagnetic interference effective.
In an embodiment of the present utility model, the magnetic core of described common mode inductance is made up of amorphous magnetic material.Due to non-
The pcrmeability of brilliant magnetic material is high, and therefore, the common mode of high band can be done by the common mode inductance being made up of amorphous magnetic material
Disturbing signal and have the effect that well filters, it can effectively eliminate the electromagnetism produced due to common mode interference signal in electronic equipment and do
Disturb.
In another embodiment of the present utility model, the magnetic core of described common mode inductance is made up of nanocrystalline material.
The common mode inductance being made up of nanocrystalline material, its pcrmeability is the highest, it is also possible to believe the common mode disturbances of high band
Number there is the effect that well filters, suppression electromagnetic interference effective.
In above-described embodiment of the present utility model, the pcrmeability of described common mode inductance is more than 80000 Henry/rice.
In another embodiment of the present utility model, described EMC filter circuit also includes: the second filter unit；
The outfan of described first filter unit is connected with the input of described common mode inductance；
The input of described second filter unit is connected with the outfan of described common mode inductance.
By the second filter unit is connected between the first filter unit and common mode inductance, that is, the first filter unit
Outfan be connected with the input of common mode inductance, the input of the second filter unit is connected with the outfan of common mode inductance,
The position relationship of one filter unit, the second filter unit and common mode inductance can more effectively filter the common mode in electronic equipment and do
Disturbing signal and differential mode interference signal, the inhibition of electromagnetic interference is more prominent, and inhibition is more preferable.
In above-described embodiment of the present utility model, described second filter unit and described first filter unit all include:
At least 1 differential mode inductance, and/or, at least 1 differential mode capacitor.
First filter unit and the second filter unit use at least 1 differential mode inductance, and/or, at least 1 differential mode capacitor comes
Realize, it is possible to filter differential mode interference signal present in electronic equipment to greatest extent, reduce the impact of electromagnetic interference.
In above-described embodiment of the present utility model, described differential mode inductance is connected to live wire or the zero line of described alternating current power supply
On.
In above-described embodiment of the present utility model, one end of described differential mode capacitor is connected to the live wire of described alternating current power supply
On, and the other end of described differential mode capacitor is connected on the zero line of described alternating current power supply.
This utility model utilizes the characteristic of the altofrequency high impedance that differential mode inductance has, and differential mode capacitor altofrequency is low-impedance
Characteristic, is connected to differential mode inductance respectively on live wire or the zero line of alternating current power supply, differential mode capacitor is connected to the fire of alternating current power supply
Between line and zero line, it is ensured that can effectively reduce the electromagnetic interference of electronic equipment in altofrequency section.
On the other hand this utility model provides a kind of electromagnetic oven, including as above the most described EMC filter circuit.
Structure of the present utility model and its other utility model purposes and beneficial effect will by combining accompanying drawing and
Description of preferred embodiments and become apparent from understandable.
Accompanying drawing explanation
The EMC filter circuit structural representation that Fig. 1 provides for this utility model embodiment one；
The EMC filter circuit structural representation that Fig. 2 provides for this utility model embodiment two；
The EMC filter circuit structural representation that Fig. 3 provides for this utility model embodiment three.
Reference:
10:EMC filter circuit；11: the first filter units；12: common mode inductance；
21: alternating current power supply；22: AC-DC conversion unit；13: the second filter units；
C1: differential mode capacitor；C2: differential mode capacitor；L1: differential mode inductance；
L: live wire；N: zero line.
Detailed description of the invention
Embodiment one
The EMC filter circuit structural representation that Fig. 1 provides for this utility model embodiment one.As it is shown in figure 1, the present embodiment
The EMC filter circuit 10 provided, including: interconnective first filter unit 11 and common mode inductance 12, this first filter unit
The input of 11 is connected with alternating current power supply 21, and the outfan of this common mode inductance 12 is connected with AC-DC conversion unit 22.
Wherein, this first filter unit 11 is for filtering the interference signal in electronic equipment, and this common mode inductance 12 is used for filtering
Except the common mode interference signal in electronic equipment.
Concrete, owing on the wiring board of electronic equipment, mixing is provided with the multiple high-frequency electrical being made up of different components and parts
Road, digital circuit and analog circuit etc., can produce a large amount of frequency electromagnetic waves during the work of these circuit and interfere with each other, namely electromagnetism is done
Disturb (Electromagnetic Interference is called for short EMI).If EMI is connected up by wiring board or circumscripted power line is outside
During transmitting, electromagnetic radiation pollution can be caused, not only can affect the normal work of other electronic equipments, also can be to the person peace of user
Entirely work the mischief.
For power line, the interference on power line mainly includes common mode disturbances and differential mode interference.Common mode disturbances be by
Can induce the induced voltage relative to the earth constant amplitude homophase on wire, such as, electromagnetic field is altogether with the coupling of power line
Mould disturbs.Differential mode interference refers to that the interference magnitude that in power line, live wire and zero line are sensed is generally equalized, but phase contrast is 180
Degree, differential mode interference is mainly derived from power line other equipment connected.Reduction electromagnetism described in this utility model embodiment
Interference filters the common mode disturbances in electronic equipment and differential mode interference exactly.
The EMC filter circuit 10 that this utility model embodiment provides is applied in the electronic device, is mainly used in filtering electronics
The frequency electromagnetic waves that equipment produces, reduces the electronic equipment electromagnetic interference to emission so that it is meet the national standard of EMC.
In the present embodiment, the first filter unit 11 in EMC filter circuit 10 can be selected for differential mode inductance or/and differential mode is electric
Holding and realize, it can suppress the differential mode interference signal produced in electronic equipment, reduces the level of electromagnetic interference.When the first filtering is single
When selecting common mode inductance or common mode capacitance to realize in unit 11, it also is able to suppress the common mode interference signal in electronic equipment, reduces
The level of electromagnetic interference.In this embodiment, filter the interference signal in electronic equipment mainly by the first filter unit 11,
This interference signal both can include differential mode interference signal, may also include common mode interference signal, and the present embodiment is also not limited thereof.
Its pcrmeability of common mode inductance 12 in EMC filter circuit 10 must is fulfilled for certain standard, and the pcrmeability of common mode inductance 12 is the highest,
It is the most obvious to the attenuating of common mode current, and then the most obvious to the filtration result of electronic equipment medium-high frequency electromagnetic wave.
What deserves to be explained is, in the present embodiment, the sequence of positions of the first filter unit 11 and common mode inductance 12 can be exchanged,
That is, can be connected with alternating current power supply 21 by the input of common mode inductance 12, the outfan of common mode inductance 12 and the first filtering are single
The input of unit 11 connects, and the outfan of the first filter unit 11 is connected with AC-DC conversion unit 22, accordingly, and this EMC
Filter circuit 10 first filters the common mode interference signal in electronic equipment, then filters the interference signal in electronic equipment, and this interference is believed
Number both included differential mode interference signal, included again that common mode inductance 12 did not filtered clean common mode interference signal.It is to say, this enforcement
The sequence of positions of the first filter unit 11 and common mode inductance 12 is not defined by example, as long as can filter or suppress electromagnetism
Arranging of interference sequentially all can be used, and accordingly, falls within protection domain of the present utility model.
The EMC filter circuit that this utility model embodiment provides, by by the input of the first filter unit and alternating current
Source connects, and the outfan of the first filter unit is connected with the input of common mode inductance, and the outfan of common mode inductance turns with alternating current-direct current
Changing unit to connect, disturb signal, the common mode inductance that utilize the first filter unit to filter in electronic equipment filter in electronic equipment
Common mode interference signal, effectively inhibits the electromagnetic interference in electronic equipment, and, the technical program need not the needs such as magnet ring
Manually-operated device, solves the mechanization degree needing manually to be brought on magnet ring around the home by power line in prior art
Low, the problem of electromagnetic interference inhibition difference.
In the EMC filter circuit that another embodiment of this utility model provides, the magnetic core of common mode inductance 12 is by amorphous magnetic
Material is made.
The feature of non-crystalline material is that inside configuration atom is in random state, does not has the periodic solid material of crystal.
Generally, non-crystalline material is broadly divided into amorphous magnetic material and amorphous semiconductor material.Owing to amorphous magnetic material lacks
The magnetic anisotropy that crystalline material is had, therefore, the permeability of non-crystalline material is high, is lost little, and resistivity is high.
As a kind of example, the common mode inductance 12 in the present embodiment, its magnetic core is made up of amorphous magnetic material, therefore, is somebody's turn to do
The common mode inductance that common mode inductance 12 is made relative to ferrite material magnetic core, has higher pcrmeability, it is possible to high band
Common mode interference signal has the effect that preferably filters, and then can effectively eliminate the electricity produced in electronic equipment due to common mode interference signal
Magnetic disturbance.
In the EMC filter circuit that this utility model another embodiment provides, the magnetic core of common mode inductance 12 is by nanocrystalline material
Material is made.
Concrete, in this utility model embodiment common mode inductance 12, its magnetic core is optional to be made up of nanocrystalline material, nanometer
Brilliant magnetic core has the saturation induction density more much larger than ferrite material.Nanocrystalline material is to have high permeability, high direct current
Magnetic bias stability, high-temperature stability, broadband adaptability, low-power consumption, the soft magnetic materials of low cost, be mainly used in big merit
In rate, altofrequency, miniaturization, the switching mode power supply transformer of high-conversion rate and choke coil.Use the common mode that nanocrystalline magnet core is made
The operation principle of inductance 12 is that the principle that common mode inductance 12 is heated by sensing absorbs the common mode current in power line, and is converted into
Heat dissipates, thus greatly reduces common mode interference signal present in electronic equipment.
Therefore, in the present embodiment, using the common mode inductance 12 that amorphous magnetic material magnetic core is made, its pcrmeability is the most very
High, it is also possible to the common mode interference signal of high band is had the effect that well filters, effectively eliminate in electronic equipment due to altogether
The electromagnetic interference that mould interference signal produces.
In the EMC filter circuit that this utility model one embodiment provides, the pcrmeability of common mode inductance 12 is prosperous more than 80000
Profit/rice.
In actual applications, the interference source in the electric equipment such as electromagnetic oven has Switching Power Supply and IGBT pipe etc., ordinary circumstance
Under, the frequency of the interference source such as Switching Power Supply is 40～60kHz, and in electromagnetic oven, the operating frequency of IGBT is 20～40kHz.In order to filter
Except the frequency signal impact on external environment condition, the common mode inductance using pcrmeability higher material to make is needed could effectively to suppress electricity
Common mode interference signal present in magnetic stove.And in this utility model embodiment, the pcrmeability of common mode inductance 12 is prosperous 80000
More than profit/rice (H/m), pcrmeability is high, high band common-mode signal filters effect relatively good, effectively reduces electronics and set
Electromagnetic interference in Bei.
Embodiment two
The EMC filter circuit structural representation that Fig. 2 provides for this utility model embodiment two.This utility model embodiment is
On the basis of above-described embodiment, EMC filter circuit is further illustrated.As in figure 2 it is shown, the EMC filtering that the present embodiment provides
Circuit 10, also includes: the second filter unit 13.
Wherein, the above-mentioned outfan of the first filter unit 11 is connected with the input of common mode inductance 12；This second filtering is single
Unit's input of 13 is connected with the outfan of common mode inductance 12.
Concrete, in the present embodiment, EMC filter circuit 10 includes the first filter unit 11, common mode inductance 12 and second
Filter unit 13, and common mode inductance 12 is connected between the first filter unit 11 and the second filter unit 13.Show as one
Example, when the first filter unit 11 and the second filter unit 13 all use differential mode capacitor to realize, the first filter unit 11, common mode electricity
Sense 12 and the second filter unit 13 define π type filter circuit, and π type filter circuit can provide bigger DC current, remove not
The harmonic wave needed, suppresses electric current generation transition, and then effectively filters out common mode interference signal and differential mode present in electronic equipment and do
Disturb signal, reduce the electromagnetic interference of electronic equipment.
The EMC filter circuit that this utility model embodiment provides, in addition to including the first filter unit and common mode inductance, also wraps
Include the second filter unit, and the outfan of the first filter unit is connected with the input of common mode inductance, the second filter unit
Input is connected with the outfan of common mode inductance, the position relationship energy of the first filter unit, the second filter unit and common mode inductance
Enough more effectively filtering the common mode interference signal in electronic equipment and differential mode interference signal, the inhibition of electromagnetic interference is more prominent
Going out, inhibition is more preferable.
In the EMC filter circuit that this utility model one embodiment provides, above-mentioned second filter unit 13 and the first filtering
Unit 11 all includes: at least 1 differential mode inductance, and/or, at least 1 differential mode capacitor.
It is to say, in the EMC filter circuit that this utility model embodiment provides, the second filter unit 13 and the first filter
The implementation of ripple unit 11 has multiple.Concrete, the second filter unit 13 and the first filter unit 11 can use individually
Filtering device realizes, such as 1 differential mode inductance or 1 differential mode capacitor, it would however also be possible to employ the combinational network of two or more filtering device
Network realizes, such as 1 differential mode inductance and 1 differential mode capacitor, 2 differential mode inductances and/or 2 differential mode capacitors etc..For every kind of reality
The concrete of existing mode selects device to have again multiple implementing, and this utility model is not to the second filter unit 13 and the first filtering
Every kind of specific implementation of unit 11 is defined, as long as realized by each device or combine the technical scheme of realization all belonging to
Protection domain in technical solutions of the utility model.
Specifically, for suppressing the filter inductance of differential mode interference signal differential mode inductance.Differential mode inductance and inductance value and
Relevant by its ac frequency, in the case of ac frequency is certain, inductance value is the biggest, the obstruction ability to alternating current
The biggest, inductance value is the least, and it hinders ability the least, and in the case of inductance value is certain, the frequency of alternating current is the highest, and inductance is to friendship
The obstruction ability of stream electricity is the biggest, and frequency is the lowest, and inductance is the least to the obstruction ability of alternating current.It is to say, at electronic equipment
In the case of middle ac frequency is certain, the effect of its suppression differential mode interference signal of differential mode inductance that inductance value is the biggest is the best.
In actual applications, differential mode inductance is formed by coiling on magnet ring, and the material of common magnet ring is ferrite.
But, in order to improve the effect of differential mode inductance suppression differential mode interference signal, the differential mode inductance in this utility model embodiment also may be used
To use amorphous magnetic material or nanocrystalline material to make.
It is similar to, for suppressing the filter capacitor of differential mode interference differential mode capacitor.Differential mode capacitor characteristic is low frequency high resistant
Resisting or altofrequency Low ESR, therefore, when the first filter unit 11 and the second filter unit 13 utilize differential mode capacitor high frequency, impedance is low
Characteristic differential mode interference target signal filter is fallen.
In actual application, conventional differential mode capacitor is metallized polypropylene electric capacity (Metalized Polypropylene
Film Capacitor, is called for short MKP).
In the EMC filter circuit that this utility model one embodiment provides, above-mentioned differential mode inductance is connected to alternating current power supply 21
Live wire or zero line on.That is, differential mode inductance is connected in the live wire of alternating current power supply 21 or the path at zero line place.
For differential mode inductance, after alternating current flows through the coil of differential mode inductance, the magnetic flux inside coil can be greatly enhanced,
That is, differential mode inductance utilizes coil low frequency Low ESR, the characteristic of altofrequency high impedance to make it utilize high impedance when high frequency
Differential mode interference signal attenuation is fallen by characteristic.Due to alternating current needs to flow through differential mode inductance could be by differential mode interference signal attenuation
Fall, so, in EMC filter circuit 10, differential mode inductance should be connected to live wire or the path at zero line place of alternating current power supply 21
In.
In the EMC filter circuit that this utility model above-described embodiment provides, one end of differential mode capacitor is connected to alternating current
On the live wire in source 21, and the other end of differential mode capacitor is connected on the zero line of alternating current power supply 21.That is, differential mode capacitor is connected to hand over
In the live wire of stream power supply 21 and the path of zero line composition.
Concrete, as the above analysis, differential mode capacitor has low frequency high impedance or the low-impedance characteristic of altofrequency, because of
This, in the altofrequency stage, differential mode interference target signal filter is fallen by differential mode capacitor by the characteristic utilizing impedance low, now, differential mode capacitor
Need to be connected between the live wire of alternating current power supply and zero line, that is, one end of differential mode capacitor is connected to the live wire of alternating current power supply 21
On, and the other end of differential mode capacitor is connected on the zero line of alternating current power supply 21.
Embodiment three
The EMC filter circuit structural representation that Fig. 3 provides for this utility model embodiment three.This utility model embodiment is
On the basis of above-described embodiment, the first filter unit 11 and the second filter unit 13 implementation in EMC filter circuit are entered
One step explanation.
What deserves to be explained is, this utility model embodiment includes 1 differential mode capacitor, the second filtering with the first filter unit 11
Unit 13 includes that 1 differential mode capacitor and 1 differential mode inductance illustrate.Concrete, as it is shown on figure 3, the first filter unit 11 wraps
Including differential mode capacitor C1, its one end is connected on the live wire L of alternating current power supply 21, and the other end is connected on the zero line N of alternating current power supply 21；
Second filter unit 13 includes differential mode capacitor C2 and differential mode inductance L1, and, one end of differential mode capacitor C2 is connected to alternating current power supply
On the power line that 21 live wire L extend, the other end of differential mode capacitor C2 is connected on the power line that alternating current power supply 21 zero line N extends,
Differential mode inductance L1 is connected on the power line that alternating current power supply 21 live wire L extends.
This utility model embodiment is said with a kind of implementation of the first filter unit 11 and the second filter unit 13
Bright, for other implementation, this utility model is also not limited thereof.
The EMC filter circuit 10 provided based on the various embodiments described above, this utility model another further aspect provides a kind of electromagnetic oven,
Including the EMC filter circuit 10 in above-mentioned any embodiment, the wherein concrete structure of EMC filter circuit 10, operation principle and have
Benefit effect, can refer to the detailed description of above-mentioned any embodiment, and here is omitted.
Last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, rather than it is limited
System；Although being described in detail this utility model with reference to foregoing embodiments, those of ordinary skill in the art should
Understand: the technical scheme described in foregoing embodiments still can be modified by it, or to the most some or all of
Technical characteristic carries out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from this practicality new
The scope of type each embodiment technical scheme.
Claims (9)
1. an Electro Magnetic Compatibility EMC filter circuit, it is characterised in that described EMC filter circuit (10) including: interconnective
First filter unit (11) and common mode inductance (12), the input of described first filter unit (11) is with alternating current power supply (21) even
Connecing, the outfan of described common mode inductance (12) is connected with AC-DC conversion unit (22)；
Described first filter unit (11) is for filtering the interference signal in electronic equipment, and described common mode inductance (12) is used for filtering
Common mode interference signal in described electronic equipment.
EMC filter circuit the most according to claim 1, it is characterised in that the magnetic core of described common mode inductance (12) is by amorphous
Magnetic material is made.
EMC filter circuit the most according to claim 1, it is characterised in that the magnetic core of described common mode inductance (12) is by nanometer
Brilliant material is made.
4. according to the EMC filter circuit described in Claims 2 or 3, it is characterised in that the pcrmeability of described common mode inductance (12) is big
In 80000 Henry/rice.
EMC filter circuit the most according to claim 1, it is characterised in that described EMC filter circuit (10) also includes: the
Two filter units (13)；
The outfan of described first filter unit (11) is connected with the input of described common mode inductance (12)；
The input of described second filter unit (13) is connected with the outfan of described common mode inductance (12).
EMC filter circuit the most according to claim 5, it is characterised in that described second filter unit (13) and described
One filter unit (11) all includes: at least 1 differential mode inductance, and/or, at least 1 differential mode capacitor.
EMC filter circuit the most according to claim 6, it is characterised in that described differential mode inductance is connected to described alternating current
On the live wire (L) in source (21) or zero line (N).
EMC filter circuit the most according to claim 6, it is characterised in that one end of described differential mode capacitor is connected to described
On the live wire (L) of alternating current power supply (21), and the other end of described differential mode capacitor is connected to the zero line (N) of described alternating current power supply (21)
On.
9. an electromagnetic oven, it is characterised in that including: include the EMC filter circuit as described in any one of claim 1～8
(10)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620793037.9U CN205847083U (en) | 2016-07-25 | 2016-07-25 | EMC filter circuit and electromagnetism stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620793037.9U CN205847083U (en) | 2016-07-25 | 2016-07-25 | EMC filter circuit and electromagnetism stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205847083U true CN205847083U (en) | 2016-12-28 |
Family
ID=57640155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620793037.9U Expired - Fee Related CN205847083U (en) | 2016-07-25 | 2016-07-25 | EMC filter circuit and electromagnetism stove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205847083U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336898A (en) * | 2018-04-11 | 2018-07-27 | 四川升华电源科技有限公司 | Brick filter module and power supply module |
| CN110022056A (en) * | 2019-05-07 | 2019-07-16 | 谢群 | Common mode noise suppression circuit |
| CN112803754A (en) * | 2019-11-13 | 2021-05-14 | 广东美的白色家电技术创新中心有限公司 | EMI filter and household electrical appliance |
-
2016
- 2016-07-25 CN CN201620793037.9U patent/CN205847083U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336898A (en) * | 2018-04-11 | 2018-07-27 | 四川升华电源科技有限公司 | Brick filter module and power supply module |
| CN110022056A (en) * | 2019-05-07 | 2019-07-16 | 谢群 | Common mode noise suppression circuit |
| CN112803754A (en) * | 2019-11-13 | 2021-05-14 | 广东美的白色家电技术创新中心有限公司 | EMI filter and household electrical appliance |
| CN112803754B (en) * | 2019-11-13 | 2022-04-15 | 广东美的白色家电技术创新中心有限公司 | EMI filter and household electrical appliance |
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