CN207884490U - High-voltage great-current DC filtering circuit - Google Patents
High-voltage great-current DC filtering circuit Download PDFInfo
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- CN207884490U CN207884490U CN201820254591.9U CN201820254591U CN207884490U CN 207884490 U CN207884490 U CN 207884490U CN 201820254591 U CN201820254591 U CN 201820254591U CN 207884490 U CN207884490 U CN 207884490U
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- capacitance
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- differential mode
- filtering circuit
- mode inductance
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Abstract
The utility model discloses a kind of high-voltage great-current DC filtering circuits; including input protection circuit, common mode filtering circuit, differential mode filter circuit and output protection circuit, the input protection circuit, common mode filtering circuit, differential mode filter circuit and output protection circuit are sequentially connected；The common mode filtering circuit includes common mode inductance L1, and the capacitance C21 and capacitance C22 that the common mode inductance L1 input sides connection is in series reconnect capacitance C23, and the capacitance C23 is grounded between the capacitance C21 and capacitance C22；The capacitance C24 and capacitance C25 that the common mode inductance L1 outlet sides connection is in series, reconnect capacitance C26, and the capacitance C26 is grounded between the capacitance C24 and capacitance C25.The utility model can realize effective inhibition to the Conducted Electromagnetic Interference of high-voltage large current power-supply system, and ensure the safe handling of high-voltage large current filter.
Description
Technical field
The utility model is related to technical field of electromagnetic compatibility, and in particular to a kind of high-voltage great-current DC filtering circuit.
Background technology
For the angle of electromagnetic compatibility, high-voltage great-current power-supply system can form instantaneous huge energy in startup moment,
Electromagnetic interference is generated to the external world, influences the normal work of ambient electron system.This requires high-voltage large current DC filters
Not only has the function of good inhibition to electromagnetic interference, it is necessary to have high current cocurrent flow ability.
Power-supply filter is often with filter circuit as shown in Figure 1, capacitance Cx1 and Cx2 are safety capacitances, and referred to as X capacitances filter out
Power supply DM EMI signal, capacitance Cy are also safety capacitance, referred to as Y capacitance, and filtering common mode interference signal, inductance L is common mode electricity
Sense, has common mode interference certain inhibiting effect, has the drawback that and inhibits inadequate to the DM EMI of high-voltage large current.
Utility model content
The utility model overcomes the deficiencies in the prior art, a kind of high-voltage great-current DC filtering circuit is provided, for filtering
Wave device DM EMI rejection ability.
In view of the above problem of the prior art, according to one side disclosed by the utility model, the utility model uses
Following technical scheme：
A kind of high-voltage great-current DC filtering circuit, including input protection circuit, common mode filtering circuit, differential mode filter circuit
And output protection circuit, the input protection circuit, common mode filtering circuit, differential mode filter circuit and output protection circuit connect successively
It connects；The common mode filtering circuit includes common mode inductance L1, and the common mode inductance L1 input sides connect the capacitance C21 and electricity being in series
Hold C22, capacitance C23 is reconnected between the capacitance C21 and capacitance C22, and the capacitance C23 is grounded；The common mode inductance L1
The capacitance C24 and capacitance C25 that outlet side connection is in series, reconnect capacitance C26, and institute between the capacitance C24 and capacitance C25
State capacitance C26 ground connection；The differential mode filter circuit include differential mode inductance LD1 and differential mode inductance LD2, the differential mode inductance LD1 and
Differential mode inductance LD2 is each positioned on a power transmission line, is arranged between the differential mode inductance LD1 output ends and differential mode inductance LD2 output ends
The capacitance C31 and capacitance C32 being in series reconnect capacitance C33, and the capacitance C33 between the capacitance C31 and capacitance C32
Ground connection.
In order to which the utility model is better achieved, further technical solution is：
An embodiment according to the present utility model, the input protection circuit include resistance R1, and the resistance R1 connects
It is connected between two power transmission lines of input side.
Another embodiment according to the present utility model, the resistance R1 are power resistor.
Another embodiment according to the present utility model, the output protection circuit include resistance R2 and resistance R3, institute
Resistance R2 and resistance R3 is stated to be connected between two power transmission lines of outlet side, and the resistance R2 and resistance R3 indirectly.
Another embodiment according to the present utility model, the resistance R2 and/or resistance R3 are power resistor.
The utility model can also be：
Another embodiment according to the present utility model, the capacitance C21, capacitance C22, capacitance C23, capacitance C24, electricity
It is safety capacitance to hold C25, capacitance C26, capacitance C31, capacitance C32 and capacitance C33.
Another embodiment according to the present utility model, the differential mode inductance LD1 are single turn differential mode inductance.
Another embodiment according to the present utility model, the differential mode inductance LD2 are single turn differential mode inductance.
Compared with prior art, one of the beneficial effects of the utility model are：
A kind of high-voltage great-current DC filtering circuit of the utility model is added differential mode inductance, improves filter differential mode
Interference rejection capability；Bleeder resistance is designed, the safety of high-voltage great-current filter is improved；And to common mode filtering circuit into
Row optimization design improves circuit common mode interference rejection ability using symmetrical structure.
Description of the drawings
Illustrate present specification embodiment or technical solution in the prior art in order to clearer, it below will be to embodiment
Or attached drawing needed in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the reference to some embodiments in present specification, for those skilled in the art, what is do not made the creative labor
In the case of, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is prior art construction schematic diagram.
Fig. 2 shows the high-voltage great-current DC filtering electrical block diagrams according to the utility model one embodiment.
Specific implementation mode
The utility model is described in further detail with reference to embodiment, but the embodiment of the utility model is not
It is limited to this.
As shown in Fig. 2, Fig. 2 shows the high-voltage great-current DC filtering circuit knots according to the utility model one embodiment
Structure, a kind of high-voltage great-current DC filtering circuit, including input protection circuit (10), common mode filtering circuit 20, differential mode filtered electrical
Road 30 and output protection circuit 40, the input protection circuit 10, common mode filtering circuit 20, differential mode filter circuit 30 and output are protected
Protection circuit 40 is sequentially connected；The common mode filtering circuit 20 includes common mode inductance L1, and the common mode inductance L1 input sides connect phase
Concatenated capacitance C21 and capacitance C22 reconnects capacitance C23 between the capacitance C21 and capacitance C22, and the capacitance C23 connects
Ground；The capacitance C24 and capacitance C25 that the common mode inductance L1 outlet sides connection is in series, between the capacitance C24 and capacitance C25
Capacitance C26 is reconnected, and the capacitance C26 is grounded；The differential mode filter circuit 30 includes differential mode inductance LD1 and differential mode inductance
LD2, the differential mode inductance LD1 and differential mode inductance LD2 are each positioned on a power transmission line, the differential mode inductance LD1 output ends and differential mode
The capacitance C31 being in series and capacitance C32 are set between inductance LD2 output ends, reconnected between the capacitance C31 and capacitance C32
Capacitance C33, and the capacitance C33 is grounded.
Common mode filtering circuit 20 is common mode filtering circuit, is inhibited to power supply transient state common mode interference signal；Filter circuit
30 be differential mode filter circuit, is inhibited to power cord conduction DM EMI signal；Wherein, capacitance C21, capacitance C22, capacitance
C23, capacitance C24, capacitance C25, capacitance C26, capacitance C31, capacitance C32 and capacitance C33 are safety capacitance.Common mode inductance L1 is preferred
Single turn common mode choke, cocurrent flow ability reach 1000A.
Circuit 10 and 40 is filter input and output terminal protecting circuit, when filter is without work, to the high pressure at capacitance both ends
It releases, avoids damaging personnel.The input protection circuit 10 may include that resistance R1, the resistance R1 are connected to defeated
Between two power transmission lines for entering side, preferably resistance R1 is power resistor.The above power resistor and the capacitance of input/output terminal nearby
Bleed-off circuit is constituted, is released to capacitance both ends high pressure.
Output protection circuit 40 may include that resistance R2 and resistance R3, the resistance R2 and resistance R3 are connected on the two of outlet side
Between power transmission line, and the resistance R2 and resistance R3 indirectly, resistance R2 and/or resistance R3 are preferably power resistor.
Differential mode inductance LD1 and differential mode inductance LD2 can be single turn differential mode inductance, and cocurrent flow ability reaches 1000A.
To sum up, this high-voltage great-current DC filtering circuit can apply in high-voltage great-current power-supply system, can realize pair
Effective inhibition of the Conducted Electromagnetic Interference of high-voltage large current power-supply system, and ensure that the safety of high-voltage large current filter makes
With.
What each embodiment stressed is all the difference with other embodiments in this specification, each embodiment it
Between identical similar portion cross-reference." one embodiment " for being spoken of in the present specification, " another embodiment ",
" embodiment " etc. refers to that combining specific features, structure or the feature of embodiment description to be included in the application generality retouches
In at least one embodiment stated.It is not centainly to refer to the same implementation that statement of the same race, which occur, in multiple places in the description
Example.Furthermore, it is understood that when describing a specific features, structure or feature in conjunction with any embodiment, what is advocated is to combine
Other embodiment realizes that this feature, structure or feature are also fallen in the scope of the utility model.
Although reference be made herein to the utility model is described in multiple explanatory embodiments of the utility model, still,
It should be understood that those skilled in the art can be designed that a lot of other modification and implementations, these modifications and implementations
It will fall within scope and spirit disclosed in the present application.More specifically, it is disclosed and the scope of the claims in the application
It is interior, a variety of variations and modifications can be carried out to the building block and/or layout of theme combination layout.In addition to building block and/
Or outside the variations and modifications of layout progress, to those skilled in the art, other purposes also will be apparent.
Claims (8)
1. a kind of high-voltage great-current DC filtering circuit, it is characterised in that including input protection circuit (10), common mode filtering circuit
(20), differential mode filter circuit (30) and output protection circuit (40), the input protection circuit (10), common mode filtering circuit
(20), differential mode filter circuit (30) and output protection circuit (40) are sequentially connected；The common mode filtering circuit (20) includes common mode
Inductance L1, the capacitance C21 and capacitance C22, the capacitance C21 and capacitance C22 that the common mode inductance L1 input sides connection is in series
Between reconnect capacitance C23, and the capacitance C23 be grounded；Capacitance C24 that common mode inductance L1 outlet sides connection is in series and
Capacitance C25 reconnects capacitance C26 between the capacitance C24 and capacitance C25, and the capacitance C26 is grounded；The differential mode filtering
Circuit (30) includes that differential mode inductance LD1 and differential mode inductance LD2, the differential mode inductance LD1 and differential mode inductance LD2 are each positioned at a transmission of electricity
On line, the capacitance C31 and capacitance being in series are set between the differential mode inductance LD1 output ends and differential mode inductance LD2 output ends
C32 reconnects capacitance C33 between the capacitance C31 and capacitance C32, and the capacitance C33 is grounded.
2. high-voltage great-current DC filtering circuit according to claim 1, it is characterised in that the input protection circuit
(10) include resistance R1, the resistance R1 is connected between two power transmission lines of input side.
3. high-voltage great-current DC filtering circuit according to claim 2, it is characterised in that the resistance R1 is power electricity
Resistance.
4. high-voltage great-current DC filtering circuit according to claim 1, it is characterised in that the output protection circuit
(40) include that resistance R2 and resistance R3, the resistance R2 and resistance R3 are connected between two power transmission lines of outlet side, and described
Resistance R2 and resistance R3 indirectly.
5. high-voltage great-current DC filtering circuit according to claim 4, it is characterised in that the resistance R2 and/or resistance
R3 is power resistor.
6. high-voltage great-current DC filtering circuit according to claim 1, it is characterised in that the capacitance C21, capacitance
C22, capacitance C23, capacitance C24, capacitance C25, capacitance C26, capacitance C31, capacitance C32 and capacitance C33 are safety capacitance.
7. high-voltage great-current DC filtering circuit according to claim 1, it is characterised in that the differential mode inductance LD1 is single
Circle differential mode inductance.
8. high-voltage great-current DC filtering circuit according to claim 1, it is characterised in that the differential mode inductance LD2 is single
Circle differential mode inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820254591.9U CN207884490U (en) | 2018-02-12 | 2018-02-12 | High-voltage great-current DC filtering circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820254591.9U CN207884490U (en) | 2018-02-12 | 2018-02-12 | High-voltage great-current DC filtering circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207884490U true CN207884490U (en) | 2018-09-18 |
Family
ID=63498536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820254591.9U Active CN207884490U (en) | 2018-02-12 | 2018-02-12 | High-voltage great-current DC filtering circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207884490U (en) |
-
2018
- 2018-02-12 CN CN201820254591.9U patent/CN207884490U/en active Active
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