CN206259849U - Electromagnetic compatibility filter circuit and household electrical appliance - Google Patents
Electromagnetic compatibility filter circuit and household electrical appliance Download PDFInfo
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- CN206259849U CN206259849U CN201621365422.XU CN201621365422U CN206259849U CN 206259849 U CN206259849 U CN 206259849U CN 201621365422 U CN201621365422 U CN 201621365422U CN 206259849 U CN206259849 U CN 206259849U
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- differential mode
- mode inductance
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Abstract
The utility model embodiment provides a kind of electromagnetic compatibility filter circuit and household electrical appliance, belongs to technical field of electromagnetic compatibility, and wherein the electromagnetic compatibility filter circuit includes：First electric capacity, the first end of the first electric capacity is connected to the live wire of AC power, and the second end is connected to the zero line of AC power；Second electric capacity, the two ends of the second electric capacity are respectively connecting to the live wire and zero line of AC power；The first differential mode inductance and the second differential mode inductance being connected in series between the first end of the first electric capacity and the first end of the second electric capacity.Thereby, it is possible to simply and effectively increase the inductance value of electromagnetic compatibility circuit to improve its magnetic strength effect, conduction dominant frequency interference noise is effectively reduced, lift the EMC surpluses using the product of the electromagnetic compatibility filter circuit.
Description
Technical field
The utility model is related to electronic technology field, in particular it relates to a kind of electromagnetic compatibility filter circuit and household 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 are set up generally by power end so that household appliances can pass through
EMC is tested；But, production cost can be caused to increase using multiple-order low-pass filter circuit, power supply conversion efficiency is more reduced, while
Also increase 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 it is simple, with low cost and can cause household appliances effectively lifted EMC surpluses electromagnetism it is simultaneous
Capacitor filter circuit 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 have that the purpose of one side of the present utility model is to provide a kind of design
The electromagnetic compatibility filter circuit of effect lifting EMC surpluses；The purpose of the utility model another aspect is to provide one kind comprising above-mentioned electricity
The household electrical appliance of magnetic compatibility filter circuit, 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 filter circuit, the electricity
Road includes：
First electric capacity, the first end of above-mentioned first electric capacity is connected to the live wire of AC power, and the second end is connected to alternating current
The zero line in source；
Second electric capacity, the first end of above-mentioned second electric capacity is connected to the live wire of above-mentioned AC power, and the second end is connected to
State the zero line of AC power；
The the first differential mode electricity being connected in series between the first end of above-mentioned first electric capacity and the first end of above-mentioned second electric capacity
Sense and the second differential mode inductance.
Preferably, the Static Electro sensibility reciprocal of above-mentioned first differential mode inductance and above-mentioned second differential mode inductance is 200 μ H-400 μ H.
Preferably, the two ends of second electric capacity are further adapted for connection load, and the load has certain load rating electric current,
The overcurrent capability of above-mentioned first differential mode inductance and above-mentioned second differential mode inductance should be greater than 1.2 times of above-mentioned load rating electric current.
Preferably, when the electric current for flowing through above-mentioned first differential mode inductance and the second differential mode inductance exceedes above-mentioned load rating electric current
When, the dynamic electric sensibility reciprocal of above-mentioned first differential mode inductance and the second differential mode inductance should be poor not less than above-mentioned first differential mode inductance and second
The 30% of the Static Electro sensibility reciprocal of mould inductance.
Preferably, first differential mode inductance and the second differential mode inductance include inductance coil and magnetic core, above-mentioned first differential mode electricity
The material of the inductance coil of sense and the second differential mode inductance includes copper cash；Above-mentioned first differential mode inductance and above-mentioned second differential mode inductance
The material of magnetic core includes soft magnetic materials and/or ferrite.
Preferably, above-mentioned soft magnetic materials includes ferrocart core and/or iron sial.
Preferably, the Static Electro sensibility reciprocal of above-mentioned first differential mode inductance be 220 μ H, and above-mentioned second differential mode inductance static state
Inductance value is 200 μ H.
Preferably, the capacitance of above-mentioned first electric capacity is 6.8 μ H, and the capacitance of above-mentioned second electric capacity is 10 μ H.
On the other hand the utility model embodiment provides a kind of household electrical appliance, and the household electrical appliance include electromagnetism mentioned above
Compatible filter circuit.
Preferably, above-mentioned household electrical appliance include electromagnetic oven.
By above-mentioned technical proposal, a kind of specific electromagnetic compatibility filtered electrical with low-frequency filter characteristicses is at least disclosed
Road, can effectively suppress the DM EMI of load, and be set between two filter capacitors in the electromagnetic compatibility filter circuit
Put two differential mode inductances being connected in series, can it is easy and effective and at low cost increase electromagnetic compatibility filter circuit inductance value with
Improve its magnetic strength effect；Compared to EMC filter circuit numerous and diverse in the prior art, less component, smaller body are being realized
Conduction dominant frequency interference noise is also effectively reduced while long-pending, can be pre- compared to expectation EMC indexs using the product of the circuit
Reserve more EMC surpluses.
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 filter circuit of the embodiment of the utility model one；
Fig. 2 is illustrated that the household electrical appliance comprising electromagnetic compatibility filter circuit shown in Fig. 1 of the embodiment of the utility model one
Structural representation.
Description of reference numerals
C1、C2Electric capacity L1、L2Differential mode inductance
The electrical apparatus control circuit of ACL AC powers live wire 202
10th, the household electrical appliance of 201 electromagnetic compatibility filter circuit 20
ACN AC power zero lines
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 combinations thereof.It should be understood that when we claim element be " connected " or
During " coupled " to another element, it can be directly connected or coupled to other elements, or can also there is intermediary element.This
Outward, " connection " used herein or " coupling " can include wireless connection or wireless coupling.Wording "and/or" bag used herein
Include one or more associated wholes or any cell of listing item and all combine.
The structural representation of the electromagnetic compatibility filter circuit that the embodiment of the utility model one is provided is illustrated that referring to Fig. 1
Figure, the electromagnetic compatibility filter circuit 10 is adapted to be coupled to load, and specifically, the electromagnetic compatibility filter circuit 10 is included：Bridging is handed over
Flow the electric capacity C of power firestreak ACL and AC power zero line ACN1、C2, in electric capacity C1、C2Between differential mode inductance L1、L2, wherein electricity
Hold C1It is connected to one end and the differential mode inductance L of AC power interface ACL1One end be connected, differential mode inductance L1The other end and difference
Mould inductance L2One end connection, differential mode inductance L2The other end and C2One end connection.Thus, by two in circuit filtering
Electric capacity C1、C2Between two differential mode inductances being connected in series are set, can simply and effectively increase the electricity of electromagnetic compatibility filter circuit
Sensibility reciprocal to improve its magnetic strength effect, effectively reduce conduction dominant frequency interference noise, have the ability be using the circuit product compared to
Expect that EMC indexs reserve more EMC surpluses, and the occupancy in the space of excessive cost and circuit board need not be increased.Can
To understand, in order to ensure differential mode inductance L1、L2Normal work in the electromagnetic compatibility filter circuit 10, wherein differential mode electricity
Sense L1、L2Overcurrent capability should be greater than 1.2 times of rated current of the load that the circuit 10 is connected；Further, in order to
The normal EMC filtering performances of the circuit 10 are ensured, should cause that differential mode inductance L ought be flowed through1、L2Electric current exceed above-mentioned load volume
When determining electric current, differential mode inductance L1Dynamic electric sensibility reciprocal should be greater than the 30% of its Static Electro sensibility reciprocal, and differential mode inductance L2Dynamic electric
Sensibility reciprocal should be greater than the 30% of its Static Electro sensibility reciprocal.It is understood that the electromagnetic compatibility filter circuit disclosed in the present embodiment
Electronic component and the connection of AC power live wire ACL or zero line ACN should be indirectly connected with 10, more specifically electronics unit device
Part can be based on being realized and AC power live wire ACL or zero line for being connected to the power interface of live wire ACL or zero line ACN
The connection of ACN.
Each electronic component in the electromagnetic compatibility filter circuit 10 shown in specific open the present embodiment will be continued below
Type selecting parameter, wherein electric capacity C1Capacitance be 6.8 μ H, and electric capacity C2Capacitance be 10 μ H；And wherein selected difference
Mould inductance L1、L2Static Electro sensibility reciprocal be 200 μ H-400 μ H.Differential mode inductance L1、L2Can be made up of inductance coil and magnetic core, its
The material of middle inductance coil can use copper cash, and the material of its magnetic core can also use common iron oxygen using soft magnetic materials
Body；Soft magnetic materials more specifically in the material of its magnetic core can also use iron sial using ferrocart core.It is new in this practicality
In some preferred embodiments of type embodiment, differential mode L1The Static Electro sensibility reciprocal of inductance is 220 μ H, and above-mentioned differential mode inductance
Static Electro sensibility reciprocal is 200 μ H.By the type selecting parameter of each electronic component disclosed in the present embodiment, can be more directly
Guiding those of ordinary skill in the art put into practice the technical solution of the utility model, more easily to realize electromagnetism shown in the present embodiment
The outstanding EMC filtering performances of compatible filter circuit 10.
The family expenses comprising electromagnetic compatibility filter circuit shown in Fig. 1 of the embodiment of the utility model one are illustrated that referring to Fig. 2
The structural representation of electrical equipment, the household electrical appliance 20 are connected comprising electromagnetic compatibility filter circuit 201 and with the filter circuit 201
Electrical apparatus control circuit 202, on the electromagnetic compatibility filter circuit 201 structure and type selecting are referred to above-described embodiment, therefore
Not in this to go forth.Thus, the electromagnetic compatibility filter disclosed in the utility model embodiment is employed due to the household electrical appliance 20
Wave circuit so that the household electrical appliance 20 very easily can test defined in regulation by IEC new household electrical appliances EMC in 2016
Conduction test frequency range for 9KHz~30MHz EMC test；More specifically, when the household electrical appliance 20 are specifically employed
After the type selecting parameter of each electronic component disclosed in the preferred embodiment of the utility model electromagnetic compatibility filter circuit 201,
At least 3dB surpluses can be implemented relative to existing EMC tests；Thus, the electromagnetic compatibility filter circuit and family are increased
The scope of application of electrical appliance, also reduces the risk that volume production is carried out to it, with very big business promotion application value.
More specifically, the household electrical appliance 20 are the household electrical appliances such as electromagnetic oven, electric cooker, on its structure and corresponding technique effect
It is referred to be described above, therefore not in this to go forth.
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 (10)
1. a kind of electromagnetic compatibility filter circuit, it is characterised in that the circuit includes：
First electric capacity, the first end of first electric capacity is connected to the live wire of AC power, and the second end is connected to AC power
Zero line；
Second electric capacity, the first end of second electric capacity is connected to the live wire of the AC power, and the second end is connected to the friendship
Flow the zero line of power supply；
The first differential mode inductance for being connected in series between the first end of first electric capacity and the first end of second electric capacity and
Second differential mode inductance.
2. electromagnetic compatibility filter circuit according to claim 1, it is characterised in that first differential mode inductance and described
The Static Electro sensibility reciprocal of two differential mode inductances is 200 μ H-400 μ H.
3. electromagnetic compatibility filter circuit according to claim 2, the two ends of second electric capacity are further adapted for connection load, and should
Load has certain load rating electric current, it is characterised in that the mistake of first differential mode inductance and second differential mode inductance
Current capacity should be greater than 1.2 times of the load rating electric current.
4. electromagnetic compatibility filter circuit according to claim 3, it is characterised in that when flow through first differential mode inductance and
When the electric current of the second differential mode inductance exceedes the load rating electric current, the dynamic of first differential mode inductance and the second differential mode inductance
Inductance value should be not less than the 30% of the Static Electro sensibility reciprocal of first differential mode inductance and the second differential mode inductance.
5. electromagnetic compatibility filter circuit according to claim 4, first differential mode inductance and the second differential mode inductance include electricity
Sense coil and magnetic core, it is characterised in that：
The material of the inductance coil of first differential mode inductance and the second differential mode inductance includes copper cash；
The material of the magnetic core of first differential mode inductance and second differential mode inductance includes soft magnetic materials and/or ferrite.
6. electromagnetic compatibility filter circuit according to claim 5, it is characterised in that the soft magnetic materials includes ferrocart core
And/or iron sial.
7. the electromagnetic compatibility filter circuit according to claim any one of 1-6, it is characterised in that：
The Static Electro sensibility reciprocal of first differential mode inductance is 220 μ H, and the Static Electro sensibility reciprocal of second differential mode inductance is 200
μH。
8. electromagnetic compatibility filter circuit according to claim 7, it is characterised in that the capacitance of first electric capacity is
6.8 μ H, and the capacitance of second electric capacity is 10 μ H.
9. a kind of household electrical appliance, it is characterised in that the household electrical appliance include the electromagnetic compatibility filter described in claim any one of 1-8
Wave circuit.
10. household electrical appliance according to claim 9, it is characterised in that the household electrical appliance include electromagnetic oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621365422.XU CN206259849U (en) | 2016-12-13 | 2016-12-13 | Electromagnetic compatibility filter circuit and household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621365422.XU CN206259849U (en) | 2016-12-13 | 2016-12-13 | Electromagnetic compatibility filter circuit and household electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206259849U true CN206259849U (en) | 2017-06-16 |
Family
ID=59028907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621365422.XU Active CN206259849U (en) | 2016-12-13 | 2016-12-13 | Electromagnetic compatibility filter circuit and household electrical appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206259849U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303805A (en) * | 2020-10-19 | 2021-02-02 | 青岛海信日立空调系统有限公司 | Communication circuit and air conditioner |
-
2016
- 2016-12-13 CN CN201621365422.XU patent/CN206259849U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303805A (en) * | 2020-10-19 | 2021-02-02 | 青岛海信日立空调系统有限公司 | Communication circuit and air conditioner |
| CN112303805B (en) * | 2020-10-19 | 2023-11-28 | 青岛海信日立空调系统有限公司 | Communication circuit and air conditioner |
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