CN206313650U - Electromagnetic compatibility wave filter and household electrical appliance - Google Patents
Electromagnetic compatibility wave filter and household electrical appliance Download PDFInfo
- Publication number
- CN206313650U CN206313650U CN201621240169.5U CN201621240169U CN206313650U CN 206313650 U CN206313650 U CN 206313650U CN 201621240169 U CN201621240169 U CN 201621240169U CN 206313650 U CN206313650 U CN 206313650U
- Authority
- CN
- China
- Prior art keywords
- port
- inductance
- electromagnetic compatibility
- wave filter
- compatibility wave
- 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.)
- Expired - Fee Related
Links
Landscapes
- Filters And Equalizers (AREA)
Abstract
The utility model is related to electromagnetic compatibility technical field of filtering, discloses a kind of electromagnetic compatibility wave filter and household electrical appliance, and wherein the electromagnetic compatibility wave filter includes：Power interface, power interface is used to be connected to AC power；Rectification module, rectification module includes ac input end mouthful and direct current output port, and wherein ac input end mouthful includes exchange input FireWire port port and exchanges input zero line port, and direct current output port includes direct-flow positive pole port and direct current negative pole port；Electric capacity, electric capacity is located between rectification module and power interface, and the exchange of bridging rectification module is input into FireWire port port and exchange input zero line port；Inductance, the first end of inductance is connected to direct current negative pole port, and load is adapted between second end and direct-flow positive pole port of inductance.Thus, there is provided a design is simple, with low cost and can cause that household appliances meet the electromagnetic compatibility wave filter that household electrical appliances EMC tests defined.
Description
Technical field
The utility model is related to electromagnetic compatibility technical field of filtering, in particular it relates to a kind of electromagnetic compatibility wave filter and family
Electrical appliance.
Background technology
Electric equipment is connected to power network by power line, and the interference signal that electric equipment itself is produced can be by power line
Pass on power network, online other equipment is constituted and is endangered.Therefore, having formulated household electrical appliances EMC (Electro Magnetic
Compatibility Electro Magnetic Compatibilities) test regulation defines conduction test frequency range, and the in-band signal amplitude
Limit value, signal contamination will not be caused to ensure that electric equipment accesses power network to power network.
On the one hand, tested to pass through household electrical appliances EMC, household electrical appliances business men needs to set up EMC filter circuit for household appliances.It is existing
In technology Π types or multiple-order low-pass filter circuit, and the Π types or multiple-order low-pass filter are set up generally by power end
More than wave circuit by the way of the multistage filtering based on common mode inductance plus differential mode filter circuit composition so that household appliances
Can be tested by EMC；But, production cost can be caused to increase using multiple-order low-pass filter circuit, more reduce Power convert
Efficiency, while also increasing the complexity of circuit design in household appliances.
On the other hand, the revision of regulation is tested with the new household electrical appliances EMC of IEC 2016, by the frequency range of conduction test by
150kHz~30MHz is changed to 9KHz~30MHz.Obviously, for the EMC filtering designed by old household electrical appliances EMC test laws and regulations requirements
Circuit cannot meet the requirement that EMC tests regulation relative to the filter effect of household appliances.
It follows that a design is simple, with low cost and can cause that household appliances meet household electrical appliances EMC test defineds
Electromagnetic compatibility wave filter is current industry technical barrier urgently to be resolved hurrily.
It should be noted that above technical problem is the present inventor being found during the utility model is put into practice.
The content of the invention
It is simple, with low cost and can be so that household appliances pass through that the purpose of the utility model one side is to provide a kind of design
The electromagnetic compatibility wave filter of household electrical appliances EMC tests；The purpose of the utility model another aspect is to provide a kind of simultaneous comprising above-mentioned electromagnetism
The household electrical appliance of capacitor filter device, to the technical problem at least solving to be illustrated in above-mentioned background technology.
To achieve these goals, on the one hand the utility model embodiment provides a kind of electromagnetic compatibility wave filter, including：
Power interface, above-mentioned power interface is used to be connected to AC power；
Rectification module, above-mentioned rectification module includes ac input end mouthful and direct current output port, wherein above-mentioned exchange is input into
Port is input into FireWire port port and exchanges input zero line port comprising exchange, and above-mentioned direct current output port includes direct-flow positive pole end
Mouth and direct current negative pole port；
Electric capacity, above-mentioned electric capacity is located between above-mentioned rectification module and above-mentioned power interface, and bridges above-mentioned rectification module
Exchange input FireWire port port and above-mentioned exchange input zero line port；
Inductance, the first end of above-mentioned inductance is connected to above-mentioned direct current negative pole port, at the second end of above-mentioned inductance and above-mentioned
Load is adapted between direct-flow positive pole port, wherein above-mentioned load includes electrical apparatus control circuit.
Preferably, above-mentioned electric capacity is X-type safety electric capacity.
Preferably, the size of the capacitance of above-mentioned electric capacity is 0.1 μ F~10 μ F.
Preferably, the size of the capacitance of above-mentioned electric capacity is 2 μ F~5.5 μ F.
Preferably, the size of the inductance value of above-mentioned inductance is 20 μ H~10mH.
Preferably, above-mentioned inductance comprising inductance coil and magnetic core, the size of the inductance value of above-mentioned inductance is 200-400 μ
H, and above-mentioned magnetic core is amorphous magnetic core.
Preferably, above-mentioned inductance comprising inductance coil and magnetic core, the size of the inductance value of above-mentioned inductance is 300-450 μ
H, and above-mentioned magnetic core is iron silicon magnetic core.
Preferably, above-mentioned inductance coil includes copper enamel-covered wire and/or copper facing aluminium enamel-covered wire.
Preferably, in the electromagnetic compatibility circuit：
Wherein, f refers to the cut-off frequency of above-mentioned electromagnetic compatibility wave filter, and L refers to the inductance value of above-mentioned inductance, in C references
State the capacitance of electric capacity.
Preferably, above-mentioned rectification module is rectifier bridge.
On the other hand the utility model embodiment provides a kind of household electrical appliance, including：Electromagnetic compatibility filtering above-mentioned above
Device；Electrical apparatus control circuit, above-mentioned electrical apparatus control circuit includes positive source port and power cathode port；Above-mentioned power cathode end
Mouth is connected to above-mentioned second end of the above-mentioned inductance in above-mentioned electromagnetic compatibility wave filter, and above-mentioned positive source port is connected to above-mentioned
The extreme mouth of above-mentioned direct-flow positive pole in electromagnetic compatibility wave filter.
By above-mentioned technical proposal, based on the filtering of the electromagnetic compatibility with low-frequency filter characteristicses that inductance and electric capacity are constituted
Device, can effective attenuation or filter electric current working frequency range exceed cut-off frequency high-frequency noise, for decay low-frequency transduction make an uproar
Sound has a significant effect, and the electromagnetic compatibility wave filter also has, and structure design is simple, increase electric energy thermal conversion efficiency, into
This low advantage, is highly suitable for household electrical appliance, especially applies in small household appliances product.Further, due to the electromagnetism
Include rectification module in Compatibility filter so that the electromagnetic compatibility wave filter also has while with em filtering function
The characteristic of rectification, can be used directly as dc source.
The further feature and advantage of the utility model embodiment will give specifically in subsequent specific embodiment part
It is bright.
Brief description of the drawings
Accompanying drawing is the utility model embodiment to be further understood for providing, and constitutes a part for specification,
It is used to explain the utility model embodiment together with following specific embodiment, but does not constitute to the utility model embodiment
Limitation.In the accompanying drawings：
Fig. 1 is illustrated that the structural representation of the electromagnetic compatibility wave filter of the embodiment of the utility model one；
Fig. 2 is illustrated that the block schematic illustration of electromagnetic compatibility wave filter shown in application drawing 1；
Fig. 3 is illustrated that the structural representation of the household electrical appliance comprising electromagnetic compatibility wave filter shown in Fig. 1；
Fig. 4 A and Fig. 4 B are illustrated that when filter circuit is not included in appliance circuit loop, for appliance circuit loop
EMC test results；
Fig. 5 A and Fig. 5 B are illustrated that when in appliance circuit loop comprising Π mode filters, for appliance circuit loop
EMC test results；
Fig. 6 be illustrated that when in appliance circuit loop comprising the electromagnetic compatibility filter circuit in the utility model embodiment
When, for the EMC test results in appliance circuit loop.
Description of reference numerals
10th, the household electrical appliance of 201 electromagnetic compatibility wave filter 20
202 electrical apparatus control circuit ACL, ACN AC power interfaces
L1Inductance C1Differential mode capacitor
AC rectifier bridges exchange end V+ rectifier bridge direct-flow positive poles end
V- rectifier bridge direct current negative pole ends
Specific embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.It should be appreciated that herein
Described specific embodiment is merely to illustrate and explains the utility model, is not limited to the utility model.
Those skilled in the art of the present technique be appreciated that used in specification of the present utility model wording " including " refer to deposit
In features described above, integer, step, operation, element and/or component, but it is not excluded that in the presence of or add one or more other
Feature, integer, step, operation, element, component and/or their group.It should be understood that when we claim element to be " connected " or " coupling
Connect " to another element when, it can be directly connected or coupled to other elements, or can also there is intermediary element.Additionally, this
In " connection " or " coupling " that uses wireless connection or wireless coupling can be included.Wording "and/or" used herein includes one
Individual or more the associated whole or any cell of listing item and all combinations.
The structural representation of the electromagnetic compatibility wave filter of the embodiment of the utility model one is illustrated that referring to Fig. 1, wherein, should
Electromagnetic compatibility wave filter 10 includes：AC power interface ACL and ACN are used to be connected to AC power；Electric capacity C1, electric capacity C1Two
End is respectively connecting to AC power interface ACL and ACN, is hereby based on differential mode capacitor C1DM EMI can be suppressed；Rectifier bridge,
Two ac input ends (exchange input zero line port and exchange input FireWire port port) of the rectifier bridge connect with AC power respectively
Mouth ACL and ACN connections, and also include inductance L in the electromagnetic compatibility wave filter1, inductance L1One end be connected to rectification
The direct current negative pole port V- of bridge, and load is adapted between the second end of inductance and the direct-flow positive pole port V+.Thus
So that electromagnetic compatibility wave filter has LC low-frequency filter characteristicses.
In order that obtain the present embodiment to be easier to be understood by the public, following discloses should have low pass LC filtering characteristics electromagnetism simultaneous
The design philosophy of capacitor filter device：High-frequency conduction noise on power interface (including power line) can be believed with differential mode and common-mode noise
Number describe；Differential mode noise flows between two transfer wires, belongs to symmetry interference；Common-mode noise is spreading out of wire with ground
Between transmit, belong to asymmetry interference, so for power interface LPF need start with terms of differential mode and common mode two.
Therefore, differential mode capacitor C is used in the present embodiment1To suppress DM EMI.It is pointed out that the electromagnetism in the utility model is simultaneous
A part for the technical essential of capacitor filter device is electric capacity C1, rectifier bridge and inductance L1It is relative in the electromagnetic compatibility wave filter
Position.By the circuit design mode with LC low-frequency filter characteristicses that the electromagnetic compatibility wave filter is used so that the electromagnetism
Compatibility filter has certain cut-off frequency, the cut-off frequency can will be exceeded in the electric current by the electromagnetic compatibility wave filter
The interference signal of frequency range decayed or filtered.
In some optional embodiments of the present embodiment, inductance L of the selection with specific inductance value1With with specific electricity
The electric capacity C of sensibility reciprocal1So that the electromagnetic compatibility wave filter has outstanding low pass LC filtering characteristics, by the electromagnetic compatibility of circuit
Property calibrates to aspiration level.Preferably, electric capacity C1It is adapted to the safety electric capacity of the X-type from Large Copacity, electric capacity C1Pressure voltage should
When the magnitude of voltage more than AC power, such as when this circuit to be accessed the power network of China, differential mode capacitor C1Pressure voltage should
When more than 220V；Inductance L1Inductance coil (not shown) can select copper enamel-covered wire and/or copper facing aluminium enamel-covered wire；Inductance L1's
Magnetic core (not shown) is selected from one or more of：Ferrite, iron silicon magnetic core, magnetic powder core, amorphous magnetic core, thus coordinate X-type
Safety electric capacity, can realize good filter effect.
It should be noted that the rectifier bridge in the present embodiment is only used as example, the rectifier bridge can be by other components
Replaced, as long as the rectification module for being that by the functional effect of corresponding rectification should all belong to protection of the present utility model
In the range of.With reference to Fig. 2, the application of the electromagnetic compatibility wave filter provided the present embodiment is further elaborated, in rectifier bridge
DC output end can connecting circuit control circuit, the AC power can choose utility grid, then correspondingly AC power connects
Mouth ACL and ACN can be respectively used to be connected to the live wire and zero line of electricity network.
Structure of the household electrical appliance comprising electromagnetic compatibility wave filter shown in Fig. 1 under an embodiment is illustrated that referring to Fig. 3
Schematic diagram, the household electrical appliance 20 include electromagnetic compatibility wave filter 201 and electrical apparatus control circuit 202, on electromagnetic compatibility wave filter
201 concrete structure may refer to the above description, therefore not in this to go forth.The electromagnetic compatibility wave filter is positioned close to power supply and connects
At mouthful, and it is connected with electrical control circuit, can effectively controls the operating current frequency range of electrical control circuit under working condition, has ensured work
Electrical control circuit under state can meet the regulation requirement of EMC tests without interference with utility grid.
It is understood that can be tested by household electrical appliances EMC in order that obtaining the household electrical appliance 20, the present embodiment utilizes electromagnetism
Compatibility filter will conduct the value that power frequency is down to below the lower limit 9KHz of EMC rules and regulations conduction test frequency ranges
2KHz.It is, using the LC low-frequency filter characteristicses of electromagnetic compatibility wave filter 201, had based on it on the operation principle that it is realized
Some cut-off frequencies, the interference signal that will be above the cut-off frequency electric current is decayed and is filtered, and the wherein cut-off frequency can be with
By inductance L1Inductance value and electric capacity C1Capacitance determined；In the present embodiment, on inductance L1With electric capacity C1Type selecting and
It is determined that, should be according to determined by the required EMC statutory standards for reaching；Further, as inductance L1Inductance value value
Scope is 20 μ H~10mH, electric capacity C1Capacitance span be 0.1 μ F~10 μ F when, can effective guarantee it is thus determined that
The cut-off frequency of electromagnetic compatibility wave filter disclosure satisfy that the requirement of EMC regulations；On above-mentioned inductance value and capacitance span
Determination method can be：Required according to test data, surplus and make the Insertion Loss curve of EMC wave filters, and then acquired
Amplitude fading, using the value after amplitude fading/10 frequency multiplication as the EMC wave filters cut-off frequency, then according to the cutoff frequency
The corresponding relation of rate and capacitance and inductance value converts to determine span.
Because in filter circuit, the effect of electric capacity is exactly to intercept low frequency, the bigger low frequency of capacitance of electric capacity by high frequency
It is less susceptible to pass through；In filtering, the electric capacity of small capacitances amount is exactly to filter high frequency, such as capacitance swing in the utility model
In the electric capacity of 1 μ F-10 μ F, exactly for filtering high frequency, preferably filter effect can be realized.More specifically, on inductance L1
Inductance value and electric capacity C1Specific value may be referred to formula：It is simultaneous that wherein f refers to above-mentioned electromagnetism
The cut-off frequency of capacitor filter device；It should be noted that in order to meet the requirement that current household electrical appliances EMC tests regulation, while being also contemplated for
The factor that noise floats in filter circuit, should be set to EMC rules and regulations by the cut-off frequency of the electromagnetic compatibility wave filter
One value of below the lower limit 9KHz of conduction test frequency range, the cut-off frequency of selected filter circuit is in the present embodiment
2KHz, the frequency range thus, it is possible to safeguard work electric current can be effectively filtered out in the interference signal of more than 9KHz；May be appreciated
It is that the cut-off frequency of the filter circuit in the present embodiment is that 2KHz is merely exemplary, filtered electrical of the cut-off frequency less than 9KHz
Road should also be and belong to the protection domain that the utility model is covered.Based on the present embodiment, just with single order LC filter circuits,
Just household electrical appliance are enabled to meet the requirement of EMC regulations；Meanwhile, compared to multistage filter circuit or Π type filter circuits, this
Circuit design in embodiment scheme is simple and can effectively reduce the additional production cost of household electrical appliance.
In the present embodiment, household electrical appliance 20 can be electromagnetic oven, because of the Electromagnetic Heating work of generally electromagnetic oven
When current work frequency range be 20KHz~40KHz, it is clear that such current work frequency range be cannot meet EMC test regulation
Requirement.But after electromagnetic compatibility circuit 10 is employed, just can realize under conditions of production cost control is ensured
Enable that electromagnetic oven is tested by household electrical appliances EMC.It is understood that the household electrical appliance in the present embodiment should not only shall be limited only to the extent
Electromagnetic oven, can also include the household electrical appliance such as washing machine, air-conditioning.
Need to illustrate again herein, the specific type selecting of inductance, electric capacity disclosed in the utility model, and thus
Filter circuit determined by type selecting, is a key factor for realizing utility model purpose of the present utility model.Can so manage
Solution, is that can not realize that part of the present utility model is practical new if different from the utility model for the type selecting of inductance or electric capacity
Type target.In order that the utility model thought and effect more make the public be convinced, it is disclosed below using prior art and Fig. 1
Shown electromagnetic compatibility wave filter performs the related emulation experiment data of EMC tests：
Selection on EMC test objects is specific as follows：
With reference to experimental subjects one：Not including in appliance circuit loop has electromagnetic compatibility wave filter, correspondingly its result of the test
Reference picture 4A and 4B, EMC test result are：It is exceeded serious；
With reference to experimental subjects two：Include the appliance circuit loop of general Π mode filters, correspondingly its result of the test ginseng
It is according to Fig. 5 A and 5B, EMC test result：Pass through；
Experimental subjects：Comprising the electromagnetic compatibility wave filter in the utility model embodiment, correspondingly its result of the test reference
Fig. 6, EMC test result is：Pass through.
And, although the electromagnetic compatibility wave filter in general Π mode filters and the present embodiment can be realized by EMC
Test, but Fig. 5 A and Fig. 5 B are combined by comparison diagram 6, it can be found that：The filter brought using the wave filter in the present embodiment
Ripple effect is also more outstanding than Π mode filter..
Electric capacity now under the open experimental subjects of this continuation in the electromagnetic compatibility circuit and the type selecting parameter of inductance：Safety is thin
Film X electric capacity, its capacitance is 2-5.5 μ F；Selection on inductance：Amorphous inductance：Its inductance value is 200 μ H-400 μ H.Due to
The relation of length, the utility model has also carried out corresponding survey to inductance from the iron silicon inductance that inductance value is 300-450 μ H
Examination, it is also possible to obtain the experimental result tested by EMC.
Preferred embodiment of the present utility model is described in detail above in association with accompanying drawing, but, the utility model is not limited
Detail in above-mentioned implementation method, in range of the technology design of the present utility model, can be to skill of the present utility model
Art scheme carries out various simple variants, and these simple variants belong to protection domain of the present utility model.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means in order to avoid unnecessary repetition, the utility model is to each
Possible combination is planted no longer separately to illustrate.
Additionally, can also be combined between a variety of implementation methods of the present utility model, as long as it is not disobeyed
Thought of the present utility model is carried on the back, it should equally be considered as content disclosed in the utility model.
Claims (11)
1. a kind of electromagnetic compatibility wave filter, it is characterised in that including：
Power interface, the power interface is used to be connected to AC power；
Rectification module, the rectification module includes ac input end mouthful and direct current output port, wherein the ac input end mouthful
Comprising exchange input FireWire port port and exchange input zero line port, and the direct current output port include direct-flow positive pole port with
Direct current negative pole port；
Electric capacity, the electric capacity is located between the rectification module and the power interface, and bridges the exchange of the rectification module
Input FireWire port port and exchange input zero line port；
Inductance, the first end of the inductance is connected to the direct current negative pole port, in the second end of the inductance and the direct current
Load is adapted between positive pole port, wherein the load includes electrical apparatus control circuit.
2. electromagnetic compatibility wave filter according to claim 1, it is characterised in that：
The electric capacity is X-type safety electric capacity.
3. electromagnetic compatibility wave filter according to claim 2, it is characterised in that：
The size of the capacitance of the electric capacity is 0.1 μ F~10 μ F.
4. the electromagnetic compatibility wave filter according to Claims 2 or 3, it is characterised in that：
The size of the capacitance of the electric capacity is 2 μ F~5.5 μ F.
5. electromagnetic compatibility wave filter according to claim 4, it is characterised in that：
The size of the inductance value of the inductance is 20 μ H~10mH.
6. electromagnetic compatibility wave filter according to claim 5, the inductance includes inductance coil and magnetic core, and its feature exists
In：
The size of the inductance value of the inductance is 200-400 μ H, and
The magnetic core is amorphous magnetic core.
7. electromagnetic compatibility wave filter according to claim 5, the inductance includes inductance coil and magnetic core, and its feature exists
In：
The size of the inductance value of the inductance is 300-450 μ H, and
The magnetic core is iron silicon magnetic core.
8. the electromagnetic compatibility wave filter according to claim 6 or 7, it is characterised in that：
The inductance coil includes copper enamel-covered wire and/or copper facing aluminium enamel-covered wire.
9. electromagnetic compatibility wave filter according to claim 5, it is characterised in that：
Wherein, f refers to the cut-off frequency of the electromagnetic compatibility wave filter, and L refers to the inductance value of the inductance, and C refers to the electricity
The capacitance of appearance.
10. electromagnetic compatibility wave filter according to claim 1, it is characterised in that：The rectification module is rectifier bridge.
A kind of 11. household electrical appliance, it is characterised in that including：
Electromagnetic compatibility wave filter described in claim any one of 1-10；
Electrical apparatus control circuit, the electrical apparatus control circuit includes positive source port and power cathode port；
The power cathode port is connected to second end of the inductance in the electromagnetic compatibility wave filter, the power supply
Positive pole port is connected to the direct-flow positive pole port in the electromagnetic compatibility wave filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621240169.5U CN206313650U (en) | 2016-11-18 | 2016-11-18 | Electromagnetic compatibility wave filter and household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621240169.5U CN206313650U (en) | 2016-11-18 | 2016-11-18 | Electromagnetic compatibility wave filter and household electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206313650U true CN206313650U (en) | 2017-07-07 |
Family
ID=59243997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621240169.5U Expired - Fee Related CN206313650U (en) | 2016-11-18 | 2016-11-18 | Electromagnetic compatibility wave filter and household electrical appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206313650U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075627A (en) * | 2016-11-18 | 2018-05-25 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic compatibility wave filter and household electrical appliance |
-
2016
- 2016-11-18 CN CN201621240169.5U patent/CN206313650U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075627A (en) * | 2016-11-18 | 2018-05-25 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic compatibility wave filter and household electrical appliance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104270002B (en) | Passive suppression method for conducted electromagnetic interface of PWM (power width modulation) power converter | |
| Antoniali et al. | Measurement and characterization of load impedances in home power line grids | |
| CN104201590B (en) | A kind of method suppressing GIS internal high frequency Conduction Interference | |
| CN107623435A (en) | The two-way common mode differential mode EMI filter and its design method of photovoltaic module tandem | |
| Patidar et al. | Harmonics estimation and modeling of residential and commercial loads | |
| Rönnberg | Power line communication and customer equipment | |
| CN206313650U (en) | Electromagnetic compatibility wave filter and household electrical appliance | |
| Ronnberg et al. | Measurements of interaction between equipment in the frequency range 9 to 95 kHz | |
| CN103701427B (en) | For improving the household electrical appliance external front end filter of Homeplug power spectral density | |
| CN206180833U (en) | Electromagnetic compatibility wave filter and domestic appliance | |
| CN206211829U (en) | Electromagnetic compatibility filter circuit, dc source and household electrical appliance | |
| CN204858963U (en) | Electromagnetic type adds thermoelectric rice cooker's filter circuit for electromagnetic heating | |
| CN201490718U (en) | Anti-interference circuit for protecting power network and electric appliance | |
| CN108923823B (en) | System capable of inhibiting power carrier signal attenuation | |
| Kovačević et al. | Practical characterization of EMI filters replacing CISPR 17 approximate worst case measurements | |
| CN206259849U (en) | Electromagnetic compatibility filter circuit and household electrical appliance | |
| CN104244482A (en) | Low-cost induction cooker EMC control circuit | |
| CN211127565U (en) | Special power filter for EMI alternating current medical equipment | |
| CN108075627A (en) | Electromagnetic compatibility wave filter and household electrical appliance | |
| CN206834982U (en) | Filter circuit, electromagnetic heating circuit and household electrical appliance | |
| CN108075626A (en) | Electromagnetic compatibility filter circuit, DC power supply and household electrical appliance | |
| CN108075628A (en) | Electromagnetic compatibility wave filter and household electrical appliance | |
| CN206353755U (en) | Electromagnetic compatibility filter circuit, dc source and household electrical appliance | |
| CN207251950U (en) | Filter circuit and cooking apparatus for household electrical appliances | |
| CN206259706U (en) | Electromagnetic compatibility filter circuit and household electrical appliance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170707 Termination date: 20201118 |