CN209267443U - A kind of electric appliance EMC circuit and household electrical appliance - Google Patents
A kind of electric appliance EMC circuit and household electrical appliance Download PDFInfo
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- CN209267443U CN209267443U CN201821898280.2U CN201821898280U CN209267443U CN 209267443 U CN209267443 U CN 209267443U CN 201821898280 U CN201821898280 U CN 201821898280U CN 209267443 U CN209267443 U CN 209267443U
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Abstract
The utility model relates to a kind of electric appliance EMC circuit and household electrical appliance, the electric appliance EMC circuit of the utility model includes: the first filter circuit of the zero curve firewire and electrical work circuit that connect power supply, connects the PE line of power supply and first anti-jamming circuit on electrical work circuit AC ground.The utility model can effectively inhibit conduction and radiation interference, circuit simply at low cost by increasing anti-jamming circuit on exchange ground wire.
Description
Technical field
The utility model relates to EMC technical fields, more specifically to a kind of electric appliance EMC circuit and household electrical appliance.
Background technique
EMC refers to that equipment or system meet the requirements operation not to any equipment production in its environment in its electromagnetic environment
The ability of raw intolerable electromagnetic interference.Therefore, EMC includes the requirement of two aspects: on the one hand referring to that equipment is normally being transported
To the electromagnetic interference of place environment generation no more than certain limit value during row；On the other hand refer to utensil to place environment
Present in electromagnetic interference there is a degree of immunity to interference, i.e. electromagnetic susceptibility.Many electromagnetic interference problems are produced by ground wire
Raw, while ground wire is also noise transmission path, especially for alternating-current installation/AC installation, such as the alternating current motor with ground wire.Motor
Many noises can be generated during the work time, since, there are distribution capacity, noise can pass through distribution capacity and ground wire inside motor
Coupled transfer can become the propagation path of noise so as to cause the ground wire of motor.Since the PE line of AC power source generally can be direct
It is connected with the ground wire of motor, noise also inevitably enters AC network.For above analysis, the electricity with ground wire
Device, ground wire are also a noise jamming path.Existing processing conduct radiation scheme is usually in firewire, and zero curve setting is various each
The anti-interference devices such as common mode inductance, differential mode inductance, X capacitor, the Y capacitance of sample substantial amounts pass although these can play reduction
It leads the effect of radiation, but such design would generally use excessive device, leads to conceptual design redundancy and many and diverse, while
Increase design cost.
Utility model content
The technical problem to be solved by the present invention is to provide one for the above-mentioned prior art defect of the prior art
Kind electric appliance EMC circuit and household electrical appliance.
The technical scheme adopted by the utility model to solve the technical problem is as follows: constructing a kind of electric appliance EMC circuit, comprising:
The zero curve firewire of power supply and the first filter circuit of electrical work circuit are connected, PE line and the institute of the power supply are connected
State first anti-jamming circuit on electrical work circuit AC ground.
Preferably, first anti-jamming circuit includes one of common mode inductance, differential mode inductance and magnetic bead or a variety of；
And/or
First filter circuit includes one of common mode inductance and differential mode inductance or a variety of.
It preferably, further include the second anti-jamming circuit for connecting first filter circuit and the electrical work circuit.
Preferably, second anti-jamming circuit includes one of common mode inductance, differential mode inductance and magnetic bead or a variety of.
It preferably, further include the second filter circuit for connecting the PE line Yu the electrical work circuit.
Preferably, second filter circuit includes first capacitor C1 and the second capacitor C2；The first capacitor C1 connection
The zero line side of the PE line and the electrical work circuit；The second capacitor C2 connection PE line and electrical work electricity
The zero line on road.
Preferably, the electrical work circuit includes the first work motor and the second work motor；
First anti-jamming circuit includes third anti-jamming circuit and the 4th anti-jamming circuit, the anti-interference electricity of third
Road connects the AC deposition of the first work motor, and the 4th anti-jamming circuit connects the exchange of the second work motor
Ground；And/or
Second anti-jamming circuit connects first filter circuit and the second work motor.
Preferably, the electrical work circuit includes dust catcher operating circuit, and the first work motor is suction motor,
The second work motor is scrubbing brush motor.
Preferably, the third anti-jamming circuit includes the first inductance L1, and the 4th anti-jamming circuit includes the second electricity
Feel L2；And/or
Second anti-jamming circuit includes third inductance L6 and the 4th inductance L4.
The utility model also constructs a kind of household electrical appliance, including an any of the above described electric appliance EMC circuit.
A kind of electric appliance EMC circuit and household electrical appliance for implementing the utility model, have the advantages that circuit simply at
This is low.
Detailed description of the invention
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing:
Fig. 1 is a kind of circuit diagram of electric appliance EMC circuit first embodiment of the utility model；
Fig. 2 is a kind of circuit diagram of electric appliance EMC circuit second embodiment of the utility model；
Fig. 3 is a kind of circuit diagram of electric appliance EMC circuit 3rd embodiment of the utility model；
Fig. 4 is a kind of circuit diagram of electric appliance EMC circuit fourth embodiment of the utility model.
Specific embodiment
For a clearer understanding of the technical features, objectives and effects of the utility model, now control attached drawing is detailed
Illustrate specific embodiment of the present utility model.
As shown in Figure 1, in a kind of electric appliance EMC circuit first embodiment of the utility model, comprising: connection power supply
First filter circuit 20 of 10 zero curve firewire (N line and L line) and electrical work circuit 30, connect power supply 10 PE line with
First anti-jamming circuit 40 of 30 AC deposition of electrical work circuit (ACGND).Specifically, due to the exchange of electrical work circuit 30
The electric current very little of ground, almost can be ignored, and concatenate anti-interference device on the AC deposition, prevent the flowing of noise, this
Sample play prevent the noise in electrical work circuit 30 by the PE line of power supply 10 enter power grid to power grid generate interference,
Cause EMC problem.Here the first filter circuit 20 is used to filter out noise in power grid, prevents it from carrying out 30 pairs of electricity of electrical work circuit
Device operating circuit 30 generates interference.The ground wire of general alternating current equipment is protective ground, and electric current is smaller, and wherein ground wire is also noise
Propagation path equally can effectively cut off the propagation path of noise by increasing low-impedance anti-jamming circuit on ground wire.
Further, in one embodiment, the first anti-jamming circuit 40 includes in common mode inductance, differential mode inductance and magnetic bead
It is one or more；In another embodiment, the first filter circuit 20 includes one of common mode inductance and differential mode inductance or a variety of.Tool
Body, the first anti-jamming circuit 40 can use lesser common mode inductance, differential mode inductance or magnetic bead, in some scenes,
It can will be connected by the combination of multiple above-mentioned components, the first filter circuit 20 can be using differential mode inductance or common mode electricity
Sense can also carry out the combination connection of multiple above-mentioned components.
It further, further include the first filter circuit 20 of connection and electrical work as shown in Fig. 2, on the basis of above
Second anti-jamming circuit 50 of circuit 30.Specifically, connecting with electrical work circuit 30 setting the after the first filter circuit 20
Two anti-jamming circuits 50, are further reduced interfering with each other between circuit.
Further, the second anti-jamming circuit 50 includes one of common mode inductance, differential mode inductance and magnetic bead or a variety of.This
In the second anti-jamming circuit 50 can also will be passed through in some scenes using common mode inductance, differential mode inductance or magnetic bead
The combination of multiple above-mentioned components connects.
It further, can also include connection PE line and electrical work circuit 30 as shown in figure 3, on the basis of above
The second filter circuit 60.Specifically, second can also be arranged between the PE line and electrical work circuit 30 of power supply 10
Filter circuit 60 prevents noise from flowing out in power grid by the noise for absorbing excessive on PE line.
Further, as shown in figure 4, the second filter circuit 60 includes first capacitor C1 and the second capacitor C2；First capacitor
The zero line side of C1 connection PE line and electrical work circuit 30；The firewire of second capacitor C2 connection PE line and electrical work circuit 30
End.Specifically, the second filter circuit 60 here may include capacitor C1 and C2 on the basis of above, connected by capacitor C1
The zero line side for connecing PE line Yu electrical work circuit 30 is divided by the zero line of capacitor C2 connection PE line and electrical work circuit 30
The noise that different paths generate is not absorbed, and capacitor C1 and capacitor C2 here can use Y capacitance.
Further, in one embodiment, electrical work circuit 30 includes the first work motor 34 and the second work motor
35；First anti-jamming circuit 40 includes third anti-jamming circuit and the 4th anti-jamming circuit, third anti-jamming circuit connection first
The AC deposition of work motor 34, the AC deposition of the 4th anti-jamming circuit connection the second work motor 35；In another embodiment,
Two anti-jamming circuits 50 connection the first filter circuit 20 and the second work motor 35.Specifically, including in electrical work circuit 30
One or more work motor, since work motor is the maximum noise source that 30 internal noise of electrical work circuit generates, this
In the AC deposition that the first anti-jamming circuit 40 connects the work motor is usually set, for example, including the in electrical work circuit 30
One work motor 34 and the second work motor 35, the first anti-jamming circuit 40 include that the third connecting with the first work motor 34 resists
Circuit is interfered, and the 4th anti-jamming circuit connecting with the second work motor 35 here can also be by the second anti-jamming circuit 50
The work motor being set as in connecting circuit operating circuit 30, sometimes, in order to reduce device cost, in multiple motor operations
When, it can be only secondary anti-interference to the more motor progress of noise is generated, for example, the second anti-jamming circuit 50 is connected
First filter circuit 20 and the second work motor 35, filter out the noise of the second work motor 35.
Further, electrical work circuit 30 includes dust catcher operating circuit, and the first work motor 34 is suction motor, the
Two work motors 35 are scrubbing brush motor.Specifically, common electric appliance can be dust catcher here, electrical work circuit 30 is dust suction
Device operating circuit, dust catcher operating circuit include Switching Power Supply 31, unit machine 32 and motor driving 33, first in work motor
Work motor 34 is suction motor, and the second work motor 35 is scrubbing brush motor, and scrubbing brush motor operations are to circuit inner noise here
Influence it is big, it is possible to the second anti-jamming circuit 50 is connect with scrubbing brush motor.
Further, in one embodiment, third anti-jamming circuit includes the first inductance L1, and the 4th anti-jamming circuit includes
Second inductance L2；In another embodiment, the second anti-jamming circuit 50 includes third inductance L6 and the 4th inductance L4.Specifically,
Here specific anti-jamming circuit includes the first inductance L1 and the second inductance L2, and suction motor is connected by the first inductance L1 and PE line
It connecing, scrubbing brush motor connect by the second inductance L2 with PE line, and the exchange of scrubbing brush motor here is inputted including zero curve and firewire, and zero
Line input terminal is connect by inductance L6 with the zero curve input terminal of electrical work circuit 30, and firewire input terminal passes through inductance L4 and electricity
The firewire input terminal of device operating circuit 30 connects.
A kind of household electrical appliance of the utility model, including an any of the above described electric appliance EMC circuit.Specifically,
Here household electrical appliance can refer to any household electrical appliance, such as washing machine, dust catcher etc. including electric appliance EMC circuit above
Deng.
It should be understood that above embodiments only express preferred embodiments of the present invention, describe more specific
With it is detailed, but it should not be understood as limiting the scope of the patent of the utility model；It should be pointed out that for this field
Those of ordinary skill for, without departing from the concept of the premise utility, can to above-mentioned technical characterstic carry out freely
Combination, various modifications and improvements can be made, and these are all within the protection scope of the present invention；Therefore, all practical with this
The equivalents and modification that novel scope of the claims is done, should belong to the covering scope of the utility model claims.
Claims (10)
1. a kind of electric appliance EMC circuit characterized by comprising connect the zero curve firewire and electrical work circuit of power supply
First filter circuit connects the PE line of the power supply and first anti-jamming circuit on the electrical work circuit AC ground.
2. electric appliance EMC circuit according to claim 1, which is characterized in that first anti-jamming circuit includes common mode electricity
One of sense, differential mode inductance and magnetic bead are a variety of；And/or
First filter circuit includes one of common mode inductance and differential mode inductance or a variety of.
3. electric appliance EMC circuit according to claim 1, which is characterized in that further include connection first filter circuit with
Second anti-jamming circuit of the electrical work circuit.
4. electric appliance EMC circuit according to claim 3, which is characterized in that second anti-jamming circuit includes common mode electricity
One of sense, differential mode inductance and magnetic bead are a variety of.
5. electric appliance EMC circuit according to claim 1, which is characterized in that further include connecting the PE line and the electric appliance
Second filter circuit of operating circuit.
6. electric appliance EMC circuit according to claim 5, which is characterized in that second filter circuit includes first capacitor
C1 and the second capacitor C2；The first capacitor C1 connects the zero line side of the PE line Yu the electrical work circuit；Described second
Capacitor C2 connects the zero line of the PE line Yu the electrical work circuit.
7. electric appliance EMC circuit according to claim 3, which is characterized in that the electrical work circuit includes the first work
Motor and the second work motor；
First anti-jamming circuit includes third anti-jamming circuit and the 4th anti-jamming circuit, and the third anti-jamming circuit connects
The AC deposition of the first work motor is connect, the 4th anti-jamming circuit connects the AC deposition of the second work motor；With/
Or
Second anti-jamming circuit connects first filter circuit and the second work motor.
8. electric appliance EMC circuit according to claim 7, which is characterized in that the electrical work circuit includes dust catcher work
Make circuit, the first work motor is suction motor, and the second work motor is scrubbing brush motor.
9. electric appliance EMC circuit according to claim 7, which is characterized in that the third anti-jamming circuit includes the first electricity
Feel L1, the 4th anti-jamming circuit includes the second inductance L2；And/or
Second anti-jamming circuit includes third inductance L6 and the 4th inductance L4.
10. a kind of household electrical appliance, which is characterized in that including electric appliance EMC circuit described in claim 1-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821898280.2U CN209267443U (en) | 2018-11-16 | 2018-11-16 | A kind of electric appliance EMC circuit and household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821898280.2U CN209267443U (en) | 2018-11-16 | 2018-11-16 | A kind of electric appliance EMC circuit and household electrical appliance |
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| CN209267443U true CN209267443U (en) | 2019-08-16 |
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| CN201821898280.2U Active CN209267443U (en) | 2018-11-16 | 2018-11-16 | A kind of electric appliance EMC circuit and household electrical appliance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412404A (en) * | 2018-11-16 | 2019-03-01 | 惠州拓邦电气技术有限公司 | A kind of electric appliance EMC circuit and household electrical appliance |
-
2018
- 2018-11-16 CN CN201821898280.2U patent/CN209267443U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412404A (en) * | 2018-11-16 | 2019-03-01 | 惠州拓邦电气技术有限公司 | A kind of electric appliance EMC circuit and household electrical appliance |
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