CN202550545U - Three-phase miniwatt electromagnetic-interference power filter - Google Patents
Three-phase miniwatt electromagnetic-interference power filter Download PDFInfo
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- CN202550545U CN202550545U CN201220113111XU CN201220113111U CN202550545U CN 202550545 U CN202550545 U CN 202550545U CN 201220113111X U CN201220113111X U CN 201220113111XU CN 201220113111 U CN201220113111 U CN 201220113111U CN 202550545 U CN202550545 U CN 202550545U
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Abstract
The utility model provides a three-phase miniwatt electromagnetic-interference power filter, which comprises monomeric single-phase common-mode chokes L1, L2 and L3, X capacitors CX21, CX22 and CX23, Y capacitor CY1, and resistors R1, R2 and R3. The three-phase miniwatt electromagnetic-interference power filter is connected with three-phase AC input ends R, S and T. The three-phase AC input ends R, S and T are respectively connected with a phase line. The phase lines connected with any two input ends respectively are bridged with a monomeric single-phase common-mode choke. One ends of the X capacitors CX21, CX22 and CX23, which are respectively connected in parallel with the resistors R1, R2 and R3, are respectively connected with the monomeric single-phase common-mode chokes L3, L1 and L2. The other ends of the X capacitors CX21, CX22 and CX23, which are respectively connected in parallel with the resistors R1, R2 and R3, are connected with the Y capacitor CY1. The other end of the Y capacitor CY1 is grounded. The three-phase miniwatt electromagnetic-interference power filter is used for generating a larger common-mode inductance and also has the advantages of simple winding and low cost.
Description
Technical field
The utility model relates to power electronics filtering field, relates in particular to the magnetic disturbance of a kind of three-phase small power electric (Electromagnetic Interference, EMI) power-supply filter.
Background technology
At present, (Electro Magnetic Compatibility, EMC) aspect requires increasingly high the switch power supply system in fields such as communication in the Electro Magnetic Compatibility that improves Switching Power Supply.The three-phase small-power EMI power-supply filter of producing on the market at present mainly adopts topological structure as shown in Figure 1, mainly comprises: a monomer three-phase common mode inductance (Lc), a common mode capacitance (CY1), six differential mode capacitors (CX11, CX12, CX13, CX21, CX22, CX23), three resistance (R1, R2, R3), three differential mode inductances (Ld1, Ld2, Ld3).Wherein, The three-phase alternating current input is R port, S port, T port; The three-phase alternating current output is U port, V port, W port; And R, S, T port are connected to the end of X capacitor C X13, CX12, CX11 respectively, and R, S, T port also are connected to the end of monomer three-phase common mode inductance Lc respectively simultaneously, and the other end of X capacitor C X11, CX12, CX13 links together jointly; The other end of monomer three-phase common mode inductance Lc links to each other with the end of differential mode inductance Ld1, Ld2, Ld3 respectively; X capacitor C X21, CX22, CX23 link to each other with the other end of differential mode inductance Ld3, Ld2, Ld1 respectively with a end after resistance R 1, R2, R3 are in parallel respectively, and X capacitor C X21, CX22, CX23 all link to each other the other end ground connection of Y capacitor C Y1 with the other end after resistance R 1, R2, R3 are in parallel respectively with Y capacitor C Y1.
There is following defective respectively in prior art as shown in Figure 1: a monomer three-phase of needs common mode inductance Lc directly connects with three differential mode inductance Ld1, Ld2, Ld3 respectively and causes complex structure; And monomer three-phase common mode inductance Lc coiling complicacy that is connected with the three-phase alternating current input and cost are high; And monomer three-phase common mode inductance Lc receives limiting its sensibility reciprocal and can not doing very greatly of physical dimension and ampacity size; So just cause the sensibility reciprocal of inductance on the low side; So need to adopt the bigger Y electric capacity of capacitance, but this has also strengthened leakage current over the ground simultaneously, and personal safety is had hidden danger.
The utility model content
The utility model embodiment provides a kind of three-phase small power electromagnetic interference power filter, be used to produce bigger common mode sensibility reciprocal, and coiling is simple, cost is low.
The three-phase small power electromagnetic interference power filter that the utility model embodiment provides comprises:
The single-phase common mode inductance L1 of monomer, L2, L3, X capacitor C X21, CX22, CX23, Y capacitor C Y1 and resistance R 1, R2, R3, wherein,
Said three-phase small power electromagnetic interference power filter links to each other with three-phase alternating current input R, S, T, and said three-phase alternating current input R, S, T are connected with respectively on the phase line that a phase line and any two inputs connect separately that cross-over connection has a single-phase common mode inductance of monomer;
Said X capacitor C X21, CX22, CX23 link to each other with the single-phase common mode inductance L3 of said monomer, L1, L2 respectively with a end after said resistance R 1, R2, R3 are in parallel respectively; Said X capacitor C X21, CX22, CX23 link to each other the other end ground connection of said Y capacitor C Y1 with the other end after said resistance R 1, R2, R3 are in parallel with said Y capacitor C Y1 respectively.
Preferably; The single-phase common mode inductance L1 of said monomer is connected across between said three-phase alternating current input R, the S; The single-phase common mode inductance L2 of said monomer is connected across between said three-phase alternating current input S, the T, and the single-phase common mode inductance L3 of said monomer is connected across between said three-phase alternating current input R, the T, wherein; Cross-over connection has and forms the common mode inductance sensibility reciprocal between any two phase lines of the single-phase common mode inductance of monomer, and and an other phase line between form the differential mode inductance sensibility reciprocal again.
Preferably; Said three-phase small power electromagnetic interference power filter also comprises X capacitor C X11, CX12, CX13; The end of said X capacitor C X11, CX12, CX13 is connected to said three-phase alternating current input T, S, R respectively, and the other end of said X capacitor C X11, CX12, CX13 links together jointly.
Preferably; Said three-phase small power electromagnetic interference power filter also comprises X capacitor C X11, CX12, CX13; Said X capacitor C X11 is connected across between said three-phase alternating current input R, the S; Said X capacitor C X12 is connected across between said three-phase alternating current input R, the T, and said X capacitor C X13 is connected across between said three-phase alternating current input S, the T.
Preferably, the single-phase common mode inductance L1 of said monomer, L2, L3 are identical; Said X capacitor C X11, CX12, CX13, CX21, CX22, CX23 are identical; Said resistance R 1, R2, R3, R4 is identical.
Preferably, said three-phase small power electromagnetic interference power filter also comprises: resistance R 4, said resistance R 4 is in parallel with said Y capacitor C Y1, and identical with said resistance R 1, R2, R3.
Preferably, the single-phase common mode inductance L1 of said monomer, L2, L3 are the inductance that adopts the manganese-zinc ferrite material of iron-based amorphous nanometer crystalline material or high permeability.
Can find out that from above technical scheme the utility model embodiment has the following advantages:
The three-phase small power electromagnetic interference power filter that the utility model provides has comprised on the phase line that any two inputs connect separately in the three-phase alternating current input all single-phase common mode inductances of monomer of cross-over connection; Because single-phase common mode inductance of needs connection monomer only all between any two on the phase line that three input ports of three-phase alternating current input connect separately; And need be to the prior art of Fig. 1 the same differential mode inductance that is connected in series separately again; Easy realization simple in structure; And cross-over connection has and forms the common mode inductance sensibility reciprocal between any two phase lines of the single-phase common mode inductance of monomer in the utility model; And can form the differential mode inductance sensibility reciprocal again between the other phase line, can also produce the differential mode inductance sensibility reciprocal so the three-phase small power electromagnetic interference power filter that the utility model provides both can produce the common mode inductance sensibility reciprocal.And the single-phase common mode inductance coiling of the monomer in the utility model its coiling for existing monomer three-phase common mode inductance is simple; And the single-phase common mode inductance of the monomer of equal volume is bigger than the sensibility reciprocal of the monomer three-phase common mode inductance of equal volume; So the three-phase filter inductance that the utility model provides can promote common mode inductance sensibility reciprocal and differential mode inductance sensibility reciprocal greatly, and saved the cost of independent series connection differential mode inductance.Because common mode sensibility reciprocal and differential mode sensibility reciprocal have strengthened, so Y electric capacity can reduce, reduce Ground leakage current greatly, have ensured personal safety and have been applicable to the occasion higher to leakage current requirement.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously; Accompanying drawing in describing below only is some embodiment of the utility model, to those skilled in the art, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the topological structure sketch map of the three-phase small-power EMI power-supply filter that exists in the prior art;
The topological structure sketch map of a kind of three-phase small-power EMI power-supply filter that Fig. 2 provides for the utility model embodiment;
The topological structure sketch map of the another kind of three-phase small-power EMI power-supply filter that Fig. 3 provides for the utility model embodiment;
Fig. 4 is the test data sketch map that does not use power-supply filter;
Fig. 5 is to use the test data sketch map of the three-phase small-power EMI power-supply filter of prior art as shown in Figure 1;
Fig. 6 is to use the test data sketch map of the three-phase small-power EMI power-supply filter that the utility model provides.
Embodiment
The utility model embodiment provides a kind of three-phase small power electromagnetic interference power filter, be used to produce bigger common mode sensibility reciprocal, and coiling is simple, cost is low.
For making that utility model purpose, characteristic, the advantage of the utility model can be more obvious and understandable; To combine the accompanying drawing among the utility model embodiment below; Technical scheme among the utility model embodiment is carried out clear, intactly description; Obviously, the embodiments described below only are the utility model part embodiment, but not whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those skilled in the art obtained belongs to the scope that the utility model is protected.
As shown in Figure 2, the topological structure sketch map of a kind of three-phase small-power EMI power-supply filter that provides for the utility model embodiment.The three-phase small-power EMI power-supply filter that the utility model embodiment provides adopts one-level π type filtering mode; Comprise: the single-phase common mode inductance L1 of monomer, L2, L3; X capacitor C X11, CX12, CX13, CX21, CX22, CX23, Y capacitor C Y1 and resistance R 1, R2, R3.
In the present embodiment; Three-phase alternating current input R, S, T are connected with a phase line respectively; On the phase line that any two inputs connect separately in the three-phase alternating current input all cross-over connection a single-phase common mode inductance of monomer is arranged; Be respectively the single-phase common mode inductance L1 of monomer, L2, L3, for example, the single-phase common mode inductance L1 of monomer is connected across between three-phase alternating current input R, the S; The single-phase common mode inductance L2 of monomer is connected across between three-phase alternating current input S, the T; The single-phase common mode inductance L3 of monomer is connected across between three-phase alternating current input R, the T, and this connected mode can make cross-over connection have to form between any two phase lines of the single-phase common mode inductance of monomer the common mode inductance sensibility reciprocal, and and an other phase line between can form the differential mode inductance sensibility reciprocal again.
In the present embodiment; X capacitor C X21, CX22, CX23 link to each other with the single-phase common mode inductance L1 of monomer, L2, L3 respectively with a end after resistance R 1, R2, R3 are in parallel respectively; X capacitor C X21, CX22, CX23 link to each other the other end ground connection of Y capacitor C Y1 with the other end after resistance R 1, R2, R3 are in parallel with the end of Y capacitor C Y1 respectively.
In the present embodiment; As shown in Figure 2; X capacitor C X11, CX12, CX13 adopt star-like connected mode, are specially: the R port of three-phase alternating current input, S port, T port are connected to the end of X capacitor C X13, CX12, CX11 respectively, also are connected to the end of the single-phase common mode inductance L1 of monomer, L2, L3 simultaneously; Wherein, the other end of X capacitor C X13, CX12, CX11 links together jointly; The U port of three-phase alternating current output, V port, W port are connected to the other end of the single-phase common mode inductance L1 of monomer, L2, L3 respectively; X capacitor C X21, CX22, CX23 link to each other with the other end of the single-phase common mode inductance L3 of monomer, L1, L2 respectively with a end after resistance R 1, R2, R3 are in parallel respectively; X capacitor C X21, CX22, CX23 all link to each other the other end ground connection of Y capacitor C Y1 with the other end after resistance R 1, R2, R3 are in parallel respectively with Y capacitor C Y1.
As shown in Figure 3, the topological structure sketch map of the another kind of three-phase small-power EMI power-supply filter that provides for the utility model embodiment.The three-phase small-power EMI power-supply filter that the utility model embodiment provides comprises: the single-phase common mode inductance L1 of monomer, L2, L3, X capacitor C X11, CX12, CX13, CX21, CX22, CX23, Y capacitor C Y1 and resistance R 1, R2, R3, R4.
In the present embodiment; As shown in Figure 3, X capacitor C X11, CX12, CX13 adopt the triangular form connected mode, and be specially: each X electric capacity all is connected across between per two phase input ports of three-phase alternating current input; Promptly; X capacitor C X11 is connected across between R port and the S port, and X capacitor C X12 is connected across between R port and the T port, and X capacitor C X13 is connected across between S port and the T port.Adopt triangular form to connect the appearance value that method has increased X electric capacity greatly at the three-phase alternating current input.
Than Fig. 2, in Fig. 3, three-phase small-power EMI power-supply filter also comprises resistance R 4.Resistance R 4 is in parallel with Y capacitor C Y1, and resistance R 1, R2, R3, R4 be in parallel with capacitor C X21, CX22, CX23, CY1 respectively, and this connected mode in the present embodiment is the balance midpoint potential both, reduces the voltage fluctuation influence, plays the repid discharge effect again.In addition, basic identical in the present embodiment among the connected mode of other elements and Fig. 2 repeats no more at this.
In practical application, the included single-phase common mode inductance L1 of monomer of three-phase small-power EMI power-supply filter, L2, L3 specifically can be the inductance that adopts manganese-zinc (Mn-Zn) Ferrite Material of iron-based amorphous nanometer crystalline core material or the high permeability of high permeability to make.
The three-phase small power electromagnetic interference power filter that the utility model provides has comprised on the phase line that any two inputs connect separately in the three-phase alternating current input all single-phase common mode inductances of monomer of cross-over connection; Because single-phase common mode inductance of needs connection monomer only all between any two on the phase line that three input ports of three-phase alternating current input connect separately; The easy realization simple in structure of this mode; And need be to the prior art of Fig. 1 the same differential mode inductance that is connected in series separately again; And cross-over connection has and forms the common mode inductance sensibility reciprocal between any two phase lines of the single-phase common mode inductance of monomer in the utility model; And can form the differential mode inductance sensibility reciprocal again between the other phase line, can also produce the differential mode inductance sensibility reciprocal so the three-phase small power electromagnetic interference power filter that the utility model provides both can produce the common mode inductance sensibility reciprocal.
Further; The single-phase common mode inductance coiling of monomer in the utility model its coiling for existing monomer three-phase common mode inductance is simple; And the single-phase common mode inductance of the monomer of equal volume is bigger than the sensibility reciprocal of the monomer three-phase common mode inductance of equal volume; The single-phase common mode inductance of the monomer of the utility model adopts the iron-based amorphous nanometer crystalline core material of high permeability simultaneously; So the three-phase small power electromagnetic interference power filter that the utility model provides can promote common mode inductance sensibility reciprocal and differential mode inductance sensibility reciprocal greatly, and has saved the cost of independent series connection differential mode inductance.Because common mode sensibility reciprocal and differential mode sensibility reciprocal have strengthened, thus Y electric capacity can reduce, thereby reduce Ground leakage current greatly, and then ensured personal safety and be applicable to the occasion higher leakage current requirement.
The three-phase small-power EMI power-supply filter that provides for more detailed explanation the utility model; Next the filtering performance of three-phase small-power EMI power-supply filter is tested; Main its filter effect of measuring to the conduction interference noise; Test condition is: an actual product frequency converter; One with the motor of the constant power real load as the actual product frequency converter, and artificial mains network-line impedance stabilization net work (Line Impedance Stabilization Network, LISN); The EMI test receiver of a ROHDE&SCHWARZ; Use electromagnetic compatibility test software EZ-EMC to test, the filter effect of the three-phase small-power EMI power-supply filter that provides for description the utility model that can be concrete will compared under equal simulated conditions; Respectively comparison do not use power-supply filter test data, use the three-phase small-power EMI power-supply filter of prior art as shown in Figure 1 test data, use the test data of the three-phase small-power EMI power-supply filter that the utility model provides; Concrete test result is please consulted respectively like Fig. 4, Fig. 5, shown in Figure 6, and shown in Fig. 4 is the test data of not using power-supply filter, the test data of the three-phase small-power EMI power-supply filter that is to use prior art as shown in Figure 1 shown in Fig. 5; The test data that is to use the three-phase small-power EMI power-supply filter that the utility model provides shown in Fig. 6; Comparison diagram 4, Fig. 5, Fig. 6 are visible, adopt the peak value of the three-phase small-power EMI power-supply filter that the utility model provides will be much smaller than the standard value of peak value, and the mean value of EMI power-supply filter will be much smaller than the standard value of mean value.
More than a kind of three-phase small-power EMI power-supply filter that the utility model provided has been carried out detailed introduction; For one of ordinary skill in the art; Thought according to the utility model embodiment; The part that on embodiment and range of application, all can change, in sum, this description should not be construed as the restriction to the utility model.
Claims (7)
1. a three-phase small power electromagnetic interference power filter is characterized in that, comprising: the single-phase common mode inductance L1 of monomer, L2, L3, and X capacitor C X21, CX22, CX23, Y capacitor C Y1 and resistance R 1, R2, R3, wherein,
Said three-phase small power electromagnetic interference power filter links to each other with three-phase alternating current input R, S, T, and said three-phase alternating current input R, S, T are connected with respectively on the phase line that a phase line and any two inputs connect separately that cross-over connection has a single-phase common mode inductance of monomer;
Said X capacitor C X21, CX22, CX23 link to each other with the single-phase common mode inductance L3 of said monomer, L1, L2 respectively with a end after said resistance R 1, R2, R3 are in parallel respectively; Said X capacitor C X21, CX22, CX23 link to each other the other end ground connection of said Y capacitor C Y1 with the other end after said resistance R 1, R2, R3 are in parallel with said Y capacitor C Y1 respectively.
2. three-phase small power electromagnetic interference power filter according to claim 1; It is characterized in that; The single-phase common mode inductance L1 of said monomer is connected across between said three-phase alternating current input R, the S; The single-phase common mode inductance L2 of said monomer is connected across between said three-phase alternating current input S, the T, and the single-phase common mode inductance L3 of said monomer is connected across between said three-phase alternating current input R, the T, wherein; Cross-over connection has and forms the common mode inductance sensibility reciprocal between any two phase lines of the single-phase common mode inductance of monomer, and and an other phase line between form the differential mode inductance sensibility reciprocal again.
3. three-phase small power electromagnetic interference power filter according to claim 1; It is characterized in that; Said three-phase small power electromagnetic interference power filter also comprises X capacitor C X11, CX12, CX13; The end of said X capacitor C X11, CX12, CX13 is connected to said three-phase alternating current input T, S, R respectively, and the other end of said X capacitor C X11, CX12, CX13 links together jointly.
4. three-phase small power electromagnetic interference power filter according to claim 1; It is characterized in that; Said three-phase small power electromagnetic interference power filter also comprises X capacitor C X11, CX12, CX13; Said X capacitor C X11 is connected across between said three-phase alternating current input R, the S, and said X capacitor C X12 is connected across between said three-phase alternating current input R, the T, and said X capacitor C X13 is connected across between said three-phase alternating current input S, the T.
5. according to claim 3 or 4 described three-phase small power electromagnetic interference power filters; It is characterized in that; The single-phase common mode inductance L1 of said monomer, L2, L3 are identical, and said X capacitor C X11, CX12, CX13, CX21, CX22, CX23 are identical, and said resistance R 1, R2, R3 are identical.
6. three-phase small power electromagnetic interference power filter according to claim 1; It is characterized in that; Said three-phase small power electromagnetic interference power filter also comprises resistance R 4, and said resistance R 4 is in parallel with said Y capacitor C Y1, and identical with said resistance R 1, R2, R3.
7. three-phase small power electromagnetic interference power filter according to claim 1; It is characterized in that the single-phase common mode inductance L1 of said monomer, L2, L3 are the inductance of manganese-zinc ferrite material that adopts iron-based amorphous nanometer crystalline material or the high permeability of high permeability.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220113111XU CN202550545U (en) | 2012-03-22 | 2012-03-22 | Three-phase miniwatt electromagnetic-interference power filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220113111XU CN202550545U (en) | 2012-03-22 | 2012-03-22 | Three-phase miniwatt electromagnetic-interference power filter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406695A (en) * | 2014-08-27 | 2016-03-16 | 华为技术有限公司 | Switch power filtering circuit |
| CN106786586A (en) * | 2017-01-23 | 2017-05-31 | 青岛中公联信息科技有限公司 | A kind of self-adaptive electromagnetic interference filter |
| CN106992669A (en) * | 2016-01-21 | 2017-07-28 | 珠海格力电器股份有限公司 | Three-phase common mode filtering circuit and wave filter |
-
2012
- 2012-03-22 CN CN201220113111XU patent/CN202550545U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406695A (en) * | 2014-08-27 | 2016-03-16 | 华为技术有限公司 | Switch power filtering circuit |
| CN105406695B (en) * | 2014-08-27 | 2018-03-16 | 华为技术有限公司 | A kind of Switching Power Supply filter circuit |
| CN106992669A (en) * | 2016-01-21 | 2017-07-28 | 珠海格力电器股份有限公司 | Three-phase common mode filtering circuit and wave filter |
| CN106786586A (en) * | 2017-01-23 | 2017-05-31 | 青岛中公联信息科技有限公司 | A kind of self-adaptive electromagnetic interference filter |
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