CN206865422U - A kind of EMC filter circuit for Electromagnetic Heating product - Google Patents
A kind of EMC filter circuit for Electromagnetic Heating product Download PDFInfo
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- CN206865422U CN206865422U CN201720669466.XU CN201720669466U CN206865422U CN 206865422 U CN206865422 U CN 206865422U CN 201720669466 U CN201720669466 U CN 201720669466U CN 206865422 U CN206865422 U CN 206865422U
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Abstract
The utility model discloses a kind of EMC filter circuit for Electromagnetic Heating product, it includes the Y capacitance branch road being made up of the first Y capacitance and the second Y capacitance, the Y capacitance branch road is connected between two-phase power supply line and power supply ground to the power supply of Electromagnetic Heating main circuit, and the first inductance is also serially connected between the Y capacitance branch road and two-phase power supply line or power supply ground.The utility model for the common-mode noise of the electromagnetic heating apparatus such as electromagnetic oven it is big the problem of, the first inductance is concatenated between Y capacitance branch road and two-phase power supply line or power supply ground, makes have a trap near exceeded point, has reached EMC requirement, and cost is relatively low.
Description
Technical field
Daily electronics field is the utility model is related to, more particularly to a kind of EMC for Electromagnetic Heating product is filtered
Circuit.
Background technology
Electromagnetic Heating product on the market at present, such as electromagnetic oven, micro-wave oven etc., there is the characteristics of common-mode noise is big, with
Product is evolved to light and handy, super-silent direction, and working frequency increasingly improves, and common-mode noise is also more serious, adds the difficulty of filtering
Degree.
Now conventional EMC circuits such as Fig. 1, in figure, L2, C1, C4 form common mode filtering circuit, and suppression is played to common mode interference signal
Only act on, L1, C2, C3 form differential mode filter circuit, play supression to difference mode signal.C1, C4 are safety electric capacity, safety electric capacity
Can not be excessive, can not be solved so common mode is exceeded by increasing C1, C4 capacity merely, Fig. 1 is unable to reach wanting for required EMC
Ask.And the component involved by the EMC circuits of other requirements that can reach required EMC is more, cost is higher.
Utility model content
The technical problems to be solved in the utility model is, for the drawbacks described above of prior art, there is provided one kind is used for electricity
Magnetic heats the EMC filter circuit of product.
Technical scheme is used by the utility model solves its technical problem：Construct a kind of for Electromagnetic Heating product
EMC filter circuit, including the Y capacitance branch road being made up of the first Y capacitance and the second Y capacitance, the Y capacitance branch road are connected to electricity
Between the two-phase power supply line and power supply ground of magnetic heating main circuit power supply, the Y capacitance branch road is with two-phase power supply line or power supply
Between be also serially connected with the first inductance.
In a specific scheme, first inductance is the first common mode choke, first Y capacitance and the 2nd Y
The first end of electric capacity connects the two-phase power supply line to the power supply of Electromagnetic Heating main circuit respectively, and the of the first Y capacitance and the second Y capacitance
Two ends connect two inputs of first common mode choke, two output termination electricity of first common mode choke respectively
Source.
In a specific scheme, first inductance is the second common mode choke, second common mode choke
Two inputs connect the two-phase power supply line to the power supply of Electromagnetic Heating main circuit respectively, and two of second common mode choke are defeated
Go out the second termination power of the first end that end connects the first Y capacitance and the second Y capacitance respectively, the first Y capacitance and the second Y capacitance
Ground.
In a specific scheme, first inductance is ordinary inductor, the first of the first Y capacitance and the second Y capacitance
End connects the two-phase power supply line to the power supply of Electromagnetic Heating main circuit respectively, and the second end of the first Y capacitance and the second Y capacitance is via institute
State ordinary inductor with connecing power supply.
In a specific scheme, the circuit also includes the 3rd common mode choke, the first electric capacity, first inductance
For by coil is around in the 3rd common mode choke magnetic core formed induction structure, the one of the 3rd common mode choke
Individual input connects live wire, another input connection zero line of the 3rd common mode choke, first capacitance connection in
Between two inputs of the 3rd common mode choke, the first end of the first Y capacitance and the second Y capacitance connects the 3rd and is total to respectively
Second end of two output ends of mould choke coil, the first Y capacitance and the second Y capacitance via first inductance with connecing power supply.
Wherein, the circuit also includes the second inductance and the second electric capacity, and one end of second electric capacity is via described second
The first end of first Y capacitance described in inductance connection, the other end of second electric capacity connect the first end company of second Y capacitance
Connect, two power inputs that the both ends of second electric capacity power as the Electromagnetic Heating main circuit.
Implement the EMC filter circuit of the present utility model for Electromagnetic Heating product, have the advantages that：This practicality
The problem of novel pin is big to the common-mode noise of the electromagnetic heating apparatus such as electromagnetic oven, in Y capacitance branch road and two-phase power supply line or electricity
The first inductance is concatenated between the ground of source, makes have a trap near exceeded point, has reached EMC requirement, and cost is relatively low.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to the accompanying drawing of offer：
Fig. 1 is the structural representation of EMC filter circuit in the prior art；
Fig. 2 is the structural representation of embodiment one of the present utility model；
Fig. 3 is the structural representation of embodiment two of the present utility model；
Fig. 4 is the structural representation of embodiment three of the present utility model；
Fig. 5 is the structural representation of example IV of the present utility model.
Embodiment
For the ease of understanding the utility model, the utility model is more fully retouched below with reference to relevant drawings
State.Exemplary embodiments of the present utility model are given in accompanying drawing.But the utility model can come in fact in many different forms
It is existing, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is made to public affairs of the present utility model
Open content more thorough and comprehensive.
It should be noted that word " connected " or " connection ", not only include two entities being joined directly together, also include logical
Cross and be indirectly connected with other entities beneficial to improvement.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to technology of the present utility model
The implication that the technical staff in domain is generally understood that is identical.It is simply in term used in the description of the present utility model herein
The purpose of description specific embodiment, it is not intended that in limitation the utility model.
The term comprising ordinal number such as " first " that is used in this specification, " second " can be used for illustrating various inscapes,
But these inscapes are not limited by these terms.It is only that using the purpose of these terms and distinguishes an inscape
In other inscapes.For example, on the premise of the interest field of the present invention is not departed from, the first inscape can be named as the
Two inscapes, similarly, the second inscape can also be named as the first inscape.
The total thinking of the utility model is：The first electricity is concatenated between Y capacitance branch road and two-phase power supply line or power supply ground
Sense, makes have a trap near exceeded point, has reached EMC requirement, and cost is relatively low.
In order to be better understood from above-mentioned technical proposal, below in conjunction with Figure of description and specific embodiment to upper
State technical scheme to be described in detail, it should be understood that the specific features in the utility model embodiment and embodiment are to this
Apply for the detailed description of technical scheme, rather than the restriction to technical scheme, in the case where not conflicting, this practicality
Technical characteristic in new embodiment and embodiment can be mutually combined.
Embodiment one
It is the structural representation of embodiment one of the present utility model with reference to figure 2.In the present embodiment, what the first inductance used
Common mode choke L5.
Specifically, EMC filter circuit includes：First Y capacitance C8, the second Y capacitance C7, common mode choke L5, common mode chokes
Enclose L4, the first electric capacity C6, the second inductance L3, the second electric capacity C5.
Wherein, common mode choke L4 input connection live wire AC/L2, common mode choke L4 another input
Zero line AC/N2 is connected, the first electric capacity C6 is connected between common mode choke L4 two inputs, first Y capacitance
C8 and the second Y capacitance C7 first end connect common mode choke L4 two output ends, the first Y capacitance C8 and the 2nd Y electricity respectively
The second end for holding C7 connects common mode choke L5 two inputs, common mode choke L5 two output termination powers respectively
Ground.One end of the second electric capacity C5 via the second inductance L3 connections the first Y capacitance C8 first end, described second
The electric capacity C5 other end connects the first end connection of the second Y capacitance C7, and the both ends of the second electric capacity C5 are as the electricity
Two power inputs of magnetic heating main circuit power supply, two outputs of two power inputs and common mode choke L4 in figure
Circuit between end is the two-phase power supply line being previously mentioned.
Wherein, common mode choke L4, the first Y capacitance C8, the second Y capacitance C7 form common mode filtering circuit, to common mode disturbances
Signal plays supression, and the second inductance L3, the second electric capacity C5, the first electric capacity C6 form differential mode filter circuit, difference mode signal risen
Supression acts on.First Y capacitance C8, the second Y capacitance C7 are safety electric capacity, and safety electric capacity can not be excessive, and the present embodiment passes through altogether
Mould choke coil L5 is serially connected between Y capacitance branch road and power supply ground, makes have a trap near exceeded point, has reached wanting for EMC
Ask, and cost is relatively low.
Embodiment two
It is the structural representation of embodiment two of the present utility model with reference to figure 3.In the present embodiment, the first inductance is equally
The common mode choke L8 of use, the differ in that, common mode choke L8 is to be serially connected with Y capacitance branch road and two-phase power supply line
Between.
Specifically, common mode choke L8 two inputs connect common mode choke L7 two output ends, common mode respectively
Choke coil L8 two output ends connect the first Y capacitance C12 and the second Y capacitance C11 first end respectively, the first Y capacitance C12 and
Second Y capacitance C11 the second termination power.
Embodiment three
It is the structural representation of embodiment three of the present utility model with reference to figure 4.In the present embodiment, the first inductance is to use
Ordinary inductor L11.
Specifically, the first Y capacitance C15 and the second Y capacitance C16 first end connect two of common mode choke L10 respectively
Output end, the first Y capacitance C15 and the second Y capacitance C16 the second end via the ordinary inductor L11 with connecing power supply.
Example IV
It is the structural representation of example IV of the present utility model with reference to figure 5.In the present embodiment, the first inductance is to pass through
A few circle coils are around in the induction structure of common mode choke L13 magnetic core formation.One end of a few circle coils connects the first Y capacitance
C18, the second Y capacitance C19 the second end, another termination power of several circle coils.
Because the present embodiment is the inductance knot that a few circle coils of coiling are formed on existing common mode choke L13 magnetic core
Structure, therefore, circuit are simple, save the area that PCB is taken during component installation, and component cost is relatively low.
In summary, implement the EMC filter circuit of the present utility model for Electromagnetic Heating product, have below beneficial to effect
Fruit：The utility model for the common-mode noise of the electromagnetic heating apparatus such as electromagnetic oven it is big the problem of, in Y capacitance branch road and two-phase power supply
The first inductance is concatenated between line or power supply ground, makes have a trap near exceeded point, has reached EMC requirement, Er Qiecheng
This is relatively low.
Embodiment of the present utility model is described above in conjunction with accompanying drawing, but the utility model is not limited to
The embodiment stated, above-mentioned embodiment is only schematical, rather than restricted, this area it is common
Technical staff is not departing from the utility model aims and scope of the claimed protection situation under enlightenment of the present utility model
Under, many forms can be also made, these are belonged within protection of the present utility model.
Claims (6)
1. a kind of EMC filter circuit for Electromagnetic Heating product, including the Y capacitance being made up of the first Y capacitance and the second Y capacitance
Branch road, the Y capacitance branch road are connected between two-phase power supply line and power supply ground to the power supply of Electromagnetic Heating main circuit, and its feature exists
In being also serially connected with the first inductance between the Y capacitance branch road and two-phase power supply line or power supply ground.
2. EMC filter circuit according to claim 1, it is characterised in that first inductance is the first common mode choke,
The first end of first Y capacitance and the second Y capacitance connect respectively to Electromagnetic Heating main circuit power supply two-phase power supply line, first
Second end of Y capacitance and the second Y capacitance connects two inputs of first common mode choke respectively, and first common mode is gripped
Two output termination powers of stream circle.
3. EMC filter circuit according to claim 1, it is characterised in that first inductance is the second common mode choke,
Two inputs of second common mode choke connect the two-phase power supply line to the power supply of Electromagnetic Heating main circuit respectively, and described the
Two output ends of two common mode chokes connect the first end of the first Y capacitance and the second Y capacitance, the first Y capacitance and the 2nd Y respectively
Second termination power of electric capacity.
4. EMC filter circuit according to claim 1, it is characterised in that first inductance is ordinary inductor, the first Y
The first end of electric capacity and the second Y capacitance connects the two-phase power supply line to the power supply of Electromagnetic Heating main circuit, the first Y capacitance and the respectively
Second end of two Y capacitances via the ordinary inductor with connecing power supply.
5. EMC filter circuit according to claim 1, it is characterised in that the circuit also include the 3rd common mode choke,
First electric capacity, first inductance are the induction structure formed by the way that coil to be around in the magnetic core of the 3rd common mode choke,
The input connection live wire of 3rd common mode choke, another input connection zero of the 3rd common mode choke
Line, first capacitance connection is between two inputs of the 3rd common mode choke, the first Y capacitance and the second Y capacitance
First end connect two output ends of the 3rd common mode choke respectively, the second end of the first Y capacitance and the second Y capacitance is via institute
State the first inductance with connecing power supply.
6. EMC filter circuit according to claim 5, it is characterised in that the circuit also includes the second inductance and second
Electric capacity, one end of second electric capacity is via the first end of the first Y capacitance described in second inductance connection, second electric capacity
The other end connect the first end connection of second Y capacitance, the both ends of second electric capacity are as the main electricity of the Electromagnetic Heating
Two power inputs of road power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720669466.XU CN206865422U (en) | 2017-06-09 | 2017-06-09 | A kind of EMC filter circuit for Electromagnetic Heating product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720669466.XU CN206865422U (en) | 2017-06-09 | 2017-06-09 | A kind of EMC filter circuit for Electromagnetic Heating product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206865422U true CN206865422U (en) | 2018-01-09 |
Family
ID=60831493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720669466.XU Active CN206865422U (en) | 2017-06-09 | 2017-06-09 | A kind of EMC filter circuit for Electromagnetic Heating product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206865422U (en) |
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2017
- 2017-06-09 CN CN201720669466.XU patent/CN206865422U/en active Active
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