CN202550866U - Electromagnetic interference filter circuit and device with same - Google Patents
Electromagnetic interference filter circuit and device with same Download PDFInfo
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- CN202550866U CN202550866U CN201220113094XU CN201220113094U CN202550866U CN 202550866 U CN202550866 U CN 202550866U CN 201220113094X U CN201220113094X U CN 201220113094XU CN 201220113094 U CN201220113094 U CN 201220113094U CN 202550866 U CN202550866 U CN 202550866U
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Abstract
The embodiment of the utility model provides an electromagnetic interference filter circuit which comprises a monomer three-phase common-mode inductor, six X capacitors, three Y capacitors and three resistors, wherein three-phase alternating current (AC) input ends (R, S and T) sequentially pass through the X capacitors (CX1, CX2 and CX3), the monomer three-phase common-mode inductor (L1), the Y capacitors (CY1, CY2 and CY3), the X capacitors (CX4, CX5 and CX6) and the resistors (R1, R2 and R3), and are finally connected with three-phase AC output ends (U, V and W). After the electromagnetic interference filter circuit and a device with the electromagnetic interference filter circuit are adopted, the number of components can be reduced, the manufacturing technology is simplified, and the manufacturing cost is lowered.
Description
Technical field
The utility model relates to power electronics filtering field, relates in particular to a kind of electromagnetic interference (Electromagnetic Interference, EMI) filter circuit and device thereof.
Background technology
Along with the emerge in multitude of the develop rapidly of electronic technology, electronic product be widely used; Make electric network electromagnet pollute the trend that is on the rise and a kind of public hazards of formation are arranged; Particularly Transient Electromagnetic is disturbed; Its to some sophisticated electronicses to influence consequence catastrophic often, therefore need the filter product that these electromagnetic interference are suppressed.
Because the continuous increase of power, increasing electrical network begins to adopt the three-phase input mode, and present three-phase input filter is mainly as shown in Figure 1.In Fig. 1, three-phase alternating current input R, S, T pass through X capacitor C X3, CX2, CX1 successively, monomer three-phase common mode inductance L1; Y capacitor C Y1, CY2, CY3; Monomer three-phase common mode inductance L2, X capacitor C X6, CX5, CX4 arrive three-phase alternating current output U, V, W at last.
Yet needs adopt the monomer three-phase common mode inductance of two-stage in the prior art shown in Figure 1, and the manufacture craft difficulty of bringing thus is bigger and used components and parts are more, thereby has increased the cost of manufacture of filter.
The utility model content
In view of this, the utility model embodiment provides a kind of electromagnetic interference filter circuit and device thereof, is used for the large power, electrically source device to reduce component number, simplifies manufacture craft, and then reduces cost of manufacture.
On the one hand, a kind of electromagnetic interference filter circuit that the utility model embodiment provides comprises: monomer three-phase common mode inductance L1, X capacitor C X1, CX2, CX3, CX4, CX5, CX6, Y capacitor C Y1, CY2, CY3 and resistance R 1, R2, R3.Wherein, The end of said monomer three-phase common mode inductance L1 is connected to three-phase alternating current input R, S, T respectively; The other end of said monomer three-phase common mode inductance L1 is connected to three-phase alternating current output U, V, W respectively; Said X capacitor C X1, CX2, CX3 are connected across respectively between the said three-phase alternating current input RS, between the ST, between the RT; Said X capacitor C X4, CX5, CX6 are connected across respectively between the said three-phase alternating current output UV, between the VW, between the UW; The end of said Y capacitor C Y1, CY2, CY3 links to each other with the end of said X capacitor C X4, CX5, CX6 respectively, and said resistance R 1, R2, R3 are connected across respectively between the said three-phase alternating current output UV, between the VW, between the UW.
Preferably, said monomer three-phase common mode inductance L1 is the magnet ring inductance that adopts the iron-based amorphous nanometer crystalline core material making of high permeability.
Preferably, said X capacitor C X1, CX2, CX3, CX4, CX5, CX6 are identical, and said Y capacitor C Y1, CY2, CY3 are identical, and said resistance R 1, R2, R3 are all identical.
Preferably, also comprise: public terminal GND and ground wire PE wherein, isolate through insulation cushion between said public terminal GND and the said ground wire PE or directly link to each other, and the other end of said Y capacitor C Y1, CY2, CY3 connect said public terminal GND respectively.
On the other hand, the another kind of electromagnetic interference filter circuit that the utility model embodiment provides comprises: monomer three-phase common mode inductance L1, X capacitor C X1, CX2, CX3, CX4, CX5, CX6, Y capacitor C Y1, resistance R 1, R2, R3, R4, and public terminal GND.Wherein, The end of said monomer three-phase common mode inductance L1 is connected to three-phase alternating current input R, S, T respectively; The other end of said monomer three-phase common mode inductance L1 is connected to three-phase alternating current output U, V, W respectively; The end of said X capacitor C X1, CX2, CX3 respectively with said three-phase alternating current input T, S, R; The other end of said X capacitor C X1, CX2, CX3 links together jointly, and said X capacitor C X4, CX5, CX6 link to each other with said three-phase alternating current output W, V, U respectively with a end after said resistance R 1, R2, R3 are in parallel respectively, and said X capacitor C X4, CX5, CX6 all link to each other with Y capacitor C Y1 with the other end after said resistance R 1, R2, R3 are in parallel respectively; Said Y capacitor C Y1 is parallelly connected with said resistance R 4, and after parallel connection, inserts said public terminal GND with said resistance R 4.
Preferably, said monomer three-phase common mode inductance L1 adopts the magnet ring inductance that the iron-based amorphous nanometer crystalline core material of high permeability is made.
Preferably, said X capacitor C X1, CX2, CX3, CX4, CX5, CX6 are identical, and said resistance R 1, R2, R3, R4 are all identical.
Preferably, also comprise: ground wire PE, wherein, isolate through insulation cushion between said public terminal GND and the said ground wire PE or directly link to each other.
On the other hand, a kind of electromagnetic interference filter that the utility model embodiment provides comprises: above-mentioned each electromagnetic interference filter circuit, current-carrying copper bar portion, grounding parts, installation portion.Wherein, One end of said current-carrying copper bar portion is connected with three-phase alternating current input R, S, T; The other end of said current-carrying copper bar portion is connected with three-phase alternating current output U, V, W, and the area size of said current-carrying copper bar portion and the input current of three-phase alternating current input R, S, T be big or small to become positive correlation; Said grounding parts comprises first earth element and second earth element, and said first earth element is connected with ground wire, and said second earth element links to each other with Y electric capacity; Said installation portion comprises bottom surface installation elements and side installation elements, and said bottom surface installation elements is installed on the bottom surface of said electromagnetic interference filter, and said side installation elements is installed on the side of said electromagnetic interference filter.
Preferably, also comprise: the insulation support portion, said insulation support portion is installed in the two ends of said electromagnetic interference filter.
Can find out that from above technical scheme the utility model embodiment has the following advantages:
Electromagnetic interference filter circuit that the utility model provides and electromagnetic interference filter have reduced the quantity of components and parts owing to only adopted a monomer three-phase common mode inductance L1, can simplify manufacture craft, reduce cost of manufacture.
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 imports the topological structure sketch map of filter for a kind of three-phase that exists in the prior art;
The structural representation of the electromagnetic interference filter circuit that Fig. 2 provides for the utility model embodiment one;
The structural representation of the electromagnetic interference filter circuit that Fig. 3 provides for the utility model embodiment two;
The planar structure sketch map of the electromagnetic interference filter that Fig. 4 provides for the utility model embodiment three;
The structural representation of insulation support portion and grounding parts in the electromagnetic interference filter that Fig. 5 provides for the utility model embodiment three;
The perspective view of the electromagnetic interference filter that Fig. 6 provides for the utility model embodiment three;
Fig. 7 is the test data sketch map that does not use the electromagnetic interference filter;
Fig. 8 is to use the test data sketch map of the electromagnetic interference filter of prior art as shown in Figure 1;
Fig. 9 is to use the test data sketch map of the electromagnetic interference filter that the utility model provides.
Embodiment
The utility model embodiment provides a kind of electromagnetic interference filter circuit and device thereof, to reduce component number, simplifies manufacture craft, reduces cost of manufacture.
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.
Embodiment one
Electromagnetic interference filter circuit as shown in Figure 2, that the utility model embodiment provides comprises: monomer three-phase common mode inductance L1, and X capacitor C X1, CX2, CX3, CX4, CX5, CX6, Y capacitor C Y1, CY2, CY3 and resistance R 1, R2, R3, wherein,
Three-phase alternating current input R, S, T are connected with a phase line respectively; The end of said monomer three-phase common mode inductance L1 is connected to three-phase alternating current input R, S, T respectively; The other end of said monomer three-phase common mode inductance L1 is connected to three-phase alternating current output U, V, W respectively; Said X capacitor C X1, CX2, CX3 are connected across respectively between the said three-phase alternating current input RS, between the ST, between the RT; Said X capacitor C X4, CX5, CX6 are connected across respectively between the said three-phase alternating current output UV, between the VW, between the UW; The end of said Y capacitor C Y1, CY2, CY3 links to each other with the end of said X capacitor C X4, CX5, CX6 respectively, and said resistance R 1, R2, R3 are connected across respectively between the said three-phase alternating current output UV, between the VW, between the UW.
Preferably; The magnet ring inductance that the monomer three-phase common mode inductance L1 that the utility model embodiment provides can adopt the iron-based amorphous nanometer crystalline core material of high permeability to make; And monomer three-phase common mode inductance of the prior art adopts ferrite Mn-Zn material usually, and initial magnetic permeability low (about u=2000) is in order to obtain bigger sensibility reciprocal; Must use the two-stage common mode inductance, make small product size excessive.Because need the monomer three-phase common mode inductance coiling of two-stage complicated, cost is higher, prior art has increased the manufacture craft difficulty, has increased cost of manufacture.Monomer three-phase common mode inductance L1 in the electromagnetic interference filter circuit that the utility model embodiment provides is owing to adopt iron-based amorphous nanometer crystalline material magnet ring inductance; The very high u=80000 of initial magnetic permeability; Saturation flux Bs is bigger; Usually can reach 1.5T, just can obtain very big common mode sensibility reciprocal, can reduce filter overall dimension greatly with one-level π type.
Preferably, electromagnetic interference filter circuit also comprises: (GND Ground) with between the ground wire (PE, Protecting Earthing) isolates through insulation cushion common port, or public terminal GND directly links to each other with ground wire PE, and promptly common port is optional ground connection.
In practical application; Said X capacitor C X1, CX2, CX3, CX4, CX5, all identical X of the being electric capacity of CX6 can use identical model and appearance value; Said Y capacitor C Y1, CY2, all identical Y of the being electric capacity of CY3 can use identical model and appearance value, and said resistance R 1, R2, R3 is identical is that resistance can use identical model and resistance value.
Concrete, said X capacitor C X1～CX6 equates that all X electric capacity adopts triangular form to connect method among Fig. 2; Said Y capacitor C Y1～CY3 equates; Y electric capacity difference one end is connected with each phase line among Fig. 2, and another termination GND is applicable to low-pressure system (being applicable to that promptly Y electric capacity voltage withstand class requires lower occasion).When concrete the realization; X electric capacity and Y electric capacity can be integrated in a printed circuit board (PCB; Printed Circuit Board) goes up independent the installation, not only make things convenient for technological operation but also can reduce parasitic parameter, the performance with EMI power filter device of can enhancing productivity.
The electromagnetic interference filter circuit that the utility model provides has reduced the quantity of components and parts owing to only adopted a monomer three-phase common mode inductance L1, can simplify manufacture craft, reduces cost of manufacture.Resistance R described in Fig. 21, R2, R3 play discharge process, after the input outage, can in time discharge, and guarantee personal safety.
Embodiment two
Electromagnetic interference filter circuit as shown in Figure 3, that the utility model embodiment provides comprises: monomer three-phase common mode inductance L1, and X capacitor C X1, CX2, CX3, CX4, CX5, CX6, Y capacitor C Y1, resistance R 1, R2, R3, R4, and public terminal GND, wherein,
Three-phase alternating current input R, S, T are connected with a phase line respectively; The end of said monomer three-phase common mode inductance L1 is connected to three-phase alternating current input R, S, T respectively; The other end of said monomer three-phase common mode inductance L1 is connected to three-phase alternating current output U, V, W respectively; The end of said X capacitor C X1, CX2, CX3 respectively with said three-phase alternating current input T, S, R; The other end of said X capacitor C X1, CX2, CX3 links together jointly; Said X capacitor C X4, CX5, CX6 link to each other with said three-phase alternating current output W, V, U respectively with a end after said resistance R 1, R2, R3 are in parallel respectively; Said X capacitor C X4, CX5, CX6 all link to each other with Y capacitor C Y1 with the other end after said resistance R 1, R2, R3 are in parallel respectively, and said Y capacitor C Y1 is parallelly connected with said resistance R 4, and after parallel connection, inserts said public terminal GND with said resistance R 4.
Preferably; The monomer three-phase common mode inductance that the utility model embodiment provides can adopt iron-based amorphous nanometer crystalline material magnet ring inductance to process; And monomer three-phase common mode inductance of the prior art adopts ferrite Mn-Zn material usually, and initial magnetic permeability low (about u=2000) is in order to obtain bigger sensibility reciprocal; Must use the two-stage common mode inductance, make small product size excessive.Because need the monomer three-phase common mode inductance coiling of two-stage complicated, cost is higher, prior art has increased the manufacture craft difficulty, has increased cost of manufacture.Monomer three-phase common mode inductance L1 in the electromagnetic interference filter circuit that the utility model embodiment provides is owing to adopt iron-based amorphous nanometer crystalline material magnet ring inductance; The very high u=80000 of initial magnetic permeability; Saturation flux Bs is bigger; Usually can reach 1.5T, just can obtain very big common mode sensibility reciprocal, can reduce filter overall dimension greatly with one-level π type.
Preferably, electromagnetic interference filter circuit also comprises: ground wire PE, wherein, isolate through insulation cushion between said public terminal GND and the said ground wire PE or directly link to each other.
In practical application, said X capacitor C X1, CX2, CX3, CX4, CX5, all identical X of the being electric capacity of CX6 can use identical model and appearance value, and said resistance R 1, R2, R3, R4 is identical is that resistance can use identical model and resistance value.
Computing formula according to leakage current: I
Leak=2 π fC Vc can know, in the formula: f is a mains frequency, and C is the Y capacitor's capacity; Vc is the voltage at electric capacity two ends.Connect method from the Y electric capacity of Fig. 1, Fig. 2 and can know that the two ends of Vc are born voltage and are always the single-phase voltage (is that example is that Vc is 220VAC with 380VAC) in the three-phase, this moment I
Leak* 3 meetings are very big, and promptly leakage current is too big, and personal safety is had very big hidden danger, so prior art as shown in Figure 1 is not suitable for the special occasions that leakage current is had strict demand.The Y electric capacity of Fig. 1 connects method and only is applicable to low voltage product (it is not enough that Y electric capacity is withstand voltage); The power-supply system of 380V for example; Can only accomplish 440VAC because Y electric capacity (EMI filter capacitor) maximum is withstand voltage at present, and volume Da Rong value is very low, if must be applied on mesohigh system such as the 1140VAC; Just must the connection in series-parallel of several Y electric capacity; Can strengthen parasitic parameter like this and increase technology difficulty and cost (for example needing 3 groups of Y electric capacity to carry out connection in series-parallel), and because the Y1 capacitor's capacity is low low with ferrite common mode inductance sensibility reciprocal, the power filter device performance is difficult to do ideal.
And the monomer three-phase common mode inductance that the utility model embodiment provides can adopt iron-based amorphous nanometer crystalline material magnet ring inductance, the very high u=80000 of initial magnetic permeability, and saturation flux Bs is bigger; Can reach 1.5T, just can obtain very big common mode sensibility reciprocal, can reduce filter overall dimension greatly with one-level π type; And because common mode inductance improves; It is very little that Y electric capacity can be used, and can effectively reduce leakage current, guarantees safety; And can be applied to special occasions, for example colliery and the application scenario very high to leakage current requirement.Resistance R 1 described in Fig. 3, R2, R3, R4 rise all and to press and discharge process, and X electric capacity and Y electric capacity all are parallel with grading resistor, like this can the balance midpoint potential, influence to suppress voltage fluctuation.
Concrete, said X capacitor C X1～CX6 equates that all X electric capacity adopts wye connection among Fig. 3; Y electric capacity neutral earthing among Fig. 3; Because the three-phase midpoint potential is desirably 0, be the partly uneven of supply voltage so voltage is born at Y electric capacity two ends, much smaller than single-phase voltage; Can satisfy Y electric capacity requirement of withstand voltage and effectively reduce leakage current, be applicable to the mesohigh system.And said X electric capacity and Y electric capacity are integrated in independent installation the on the pcb board; Not only make things convenient for technological operation but also reduce parasitic parameter; Production efficiency and performance of filter have been improved; Prior art Y electric capacity connected mode as shown in Figure 1 is not suitable for the mesohigh network system and does not allow the application scenario of leakage current, but the utility model embodiment as shown in Figure 3 can be applicable to the mesohigh system.
The electromagnetic interference filter circuit that the utility model provides has reduced the quantity of components and parts owing to only adopted a monomer three-phase common mode inductance L1, can simplify manufacture craft, reduces cost of manufacture.
Embodiment three
As shown in Figure 4; The electromagnetic interference filter that the utility model embodiment provides comprises: like Fig. 2 or like the electromagnetic interference filter circuit 401 (content that comprises in the frame of broken lines among Fig. 4) shown among Fig. 3 any, current-carrying copper bar portion 402, grounding parts 403, installation portion 404; Wherein
Electromagnetic interference filter circuit 401 comprises: monomer three-phase common mode inductance 4011, X electric capacity 4012 (X electric capacity is respectively CX1, CX2, CX3, CX4, CX5, CX6); Y electric capacity 4013 (Y electric capacity is respectively CY1, CY2, CY3); With resistance 4014 (resistance is respectively R1, R2, R3), wherein
Three-phase alternating current input R, S, T are connected with a phase line respectively; The end of said monomer three-phase common mode inductance L1 is connected to three-phase alternating current input R, S, T respectively; The other end of said monomer three-phase common mode inductance L1 is connected to three-phase alternating current output U, V, W respectively; Said X capacitor C X1, CX2, CX3 are connected across respectively between the said three-phase alternating current input RS, between the ST, between the RT; Said X capacitor C X4, CX5, CX6 are connected across respectively between the said three-phase alternating current output UV, between the VW, between the UW; The end of said Y capacitor C Y1, CY2, CY3 links to each other with the end of said X capacitor C X4, CX5, CX6 respectively, and said resistance R 1, R2, R3 are connected across respectively between the said three-phase alternating current output UV, between the VW, between the UW.
Perhaps; Electromagnetic interference filter circuit 401 comprises: monomer three-phase common mode inductance 4011, X electric capacity 4012 (X electric capacity is respectively CX1, CX2, CX3, CX4, CX5, CX6), Y electric capacity 4013 (Y electric capacity is respectively CY1, CY2, CY3); Resistance 4014 (resistance is respectively R1, R2, R3); And public terminal GND, wherein
Three-phase alternating current input R, S, T are connected with a phase line respectively; The end of said monomer three-phase common mode inductance L1 is connected to three-phase alternating current input R, S, T respectively; The other end of said monomer three-phase common mode inductance L1 is connected to three-phase alternating current output U, V, W respectively; The end of said X capacitor C X1, CX2, CX3 respectively with said three-phase alternating current input T, S, R; The other end of said X capacitor C X1, CX2, CX3 links together jointly; Said X capacitor C X4, CX5, CX6 link to each other with said three-phase alternating current output W, V, U respectively with a end after said resistance R 1, R2, R3 are in parallel respectively; Said X capacitor C X4, CX5, CX6 all link to each other with Y capacitor C Y1 with the other end after said resistance R 1, R2, R3 are in parallel respectively, and said Y capacitor C Y1 is parallelly connected with said resistance R 4, and after parallel connection, inserts said public terminal GND with said resistance R 4.
One end of said current-carrying copper bar portion 402 is connected with three-phase alternating current input R, S, T; The other end of current-carrying copper bar portion 402 is connected with said three-phase alternating current output U, V, W, and the area size of said current-carrying copper bar portion 402 and the input current of three-phase alternating current input R, S, T be big or small to become positive correlation.
Said grounding parts 403 comprises first earth element and second earth element, and said first earth element is connected with ground wire, and said second earth element links to each other with Y electric capacity.
Said installation portion 404 comprises bottom surface installation elements and side installation elements, and said bottom surface installation elements is installed on the bottom surface of said electromagnetic interference filter, and said side installation elements is installed on the side of said electromagnetic interference filter.
Need to prove that the area size of said current-carrying copper bar portion 402 and the input current of three-phase alternating current input R, S, T be big or small to become positive correlation, promptly current-carrying copper bar portion 402 can increase or reduce the area of current-carrying copper bar portion 402 as required according to the size of input current; When input current is big more; Can select big more current-carrying copper bar portion 402, when input current more hour, can select more little current-carrying copper bar portion 402; Can satisfy the requirement of different current classes, big current expansion is convenient.
Said grounding parts 403 can adopt two kinds of earthing modes, and a kind of is that Y electric capacity is arranged, and a kind of is not have Y electric capacity; When not needing Y electric capacity, can adopt first earth element, when needs Y electric capacity; Can adopt first earth element and second earth element, optional ground connection is flexible; With strong points, need (for example IT system and explosion-proof occasion) to be suitable for different application scenarios.Wherein, in IT system, the live part of power end is earth-free or have click-through to cross impedance earth, the direct ground connection of the exposed conductive part of electric device.
Said installation portion 404 can adopt two kinds of mounting meanss: bottom surface installing type and side installing type, and flexible, to adapt to the installation requirement of different occasions.
Need to prove that as shown in Figure 4, the electromagnetic interference filter that the utility model embodiment provides can also comprise: insulation support portion 405, said insulation support portion 405 is installed in the two ends of said electromagnetic interference filter.The insulation support portion 405 at electromagnetic interference filter two ends is played fixing copper bar and is guaranteed the effect of safe spacing, good looking appearance, with low cost, simple to operate, easy to assembly.
In order more clearly to describe the insulation support portion 405 and grounding parts 403 that the utility model embodiment provides; See also shown in Figure 5ly, what Fig. 5 described is the back side like the described electromagnetic interference filter of Fig. 4, and the fixedly effect of copper bar and assurance safe spacing is played in the insulation support portion 405 at electromagnetic interference filter two ends; Grounding parts 403 optional ground connection; Flexible, with strong points, need to be suitable for different application scenarios.
Next; See also Fig. 6; The perspective view of the electromagnetic interference filter that provides for the utility model embodiment, visible in Fig. 6, an end of said current-carrying copper bar portion 402 is connected with three-phase alternating current input R, S, T; The other end of current-carrying copper bar portion 402 is connected with said three-phase alternating current output U, V, W; Said installation portion 404 comprises bottom surface installation elements and side installation elements, and said bottom surface installation elements is installed on the bottom surface of said electromagnetic interference filter, and said side installation elements is installed on the side of said electromagnetic interference filter.The effect of fixing copper bar and assurance safe spacing, grounding parts 403 optional ground connection are played in insulation support portion 405.
The electromagnetic interference filter that the utility model embodiment provides is connected on the actual product power input; The input of electromagnetic interference filter gets access to grid, and output connects the actual product input, and actual product is behind wave filter; Can effectively reduce electromagnetic interference, concrete data are seen Fig. 7, Fig. 8, Fig. 9.This apparatus structure is simple, and is easy to use, stable performance, and effect is remarkable, and is applicable to the three phase mains Filter Design of all big electric currents (hundreds of is to several kilo-amperes).
The electromagnetic interference filter that provides for more detailed explanation the utility model; Next the filtering performance of electromagnetic interference filter is tested; Main its filter effect of measuring to the conduction interference noise; Test condition is: an actual product frequency converter, and one with the motor of the constant power real load as the actual product frequency converter, artificial mains network-line impedance stabilization net work (LISN; Line Impedance Stabilization Network); The EMI test receiver of a ROHDE&SCHWARZ uses electromagnetic compatibility test software EZ-EMC to test, the filter effect of the electromagnetic interference filter that provides for description the utility model that can be concrete; To under equal simulated conditions, compare; Respectively comparison do not use the electromagnetic interference filter test data, use the electromagnetic interference filter of prior art as shown in Figure 1 test data, use the test data of the electromagnetic interference filter that the utility model provides, concrete test result is please consulted respectively like Fig. 7, Fig. 8, shown in Figure 9, shown in Fig. 7 is the test data of not using the electromagnetic interference filter; The test data of the electromagnetic interference filter that is to use prior art as shown in Figure 1 shown in Fig. 8; The test data that is to use the electromagnetic interference filter that the utility model provides shown in Fig. 9, comparison diagram 7, Fig. 8, Fig. 9 are visible, adopt the peak value of the electromagnetic interference filter that the utility model provides will be much smaller than the standard value of peak value; The mean value of electromagnetic interference filter will be much smaller than the standard value of mean value, and filter effect is obvious.
More than a kind of electromagnetic interference filter circuit and relevant apparatus that the utility model provided have 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 (12)
1. an electromagnetic interference filter circuit is characterized in that, comprising: monomer three-phase common mode inductance L1, and X capacitor C X1, CX2, CX3, CX4, CX5, CX6, Y capacitor C Y1, CY2, CY3 and resistance R 1, R2, R3, wherein,
The end of said monomer three-phase common mode inductance L1 is connected to three-phase alternating current input R, S, T respectively; The other end of said monomer three-phase common mode inductance L1 is connected to three-phase alternating current output U, V, W respectively; Said X capacitor C X1, CX2, CX3 are connected across respectively between the said three-phase alternating current input RS, between the ST, between the RT; Said X capacitor C X4, CX5, CX6 are connected across respectively between the said three-phase alternating current output UV, between the VW, between the UW; The end of said Y capacitor C Y1, CY2, CY3 links to each other with the end of said X capacitor C X4, CX5, CX6 respectively, and said resistance R 1, R2, R3 are connected across respectively between the said three-phase alternating current output UV, between the VW, between the UW.
2. electromagnetic interference filter circuit according to claim 1 is characterized in that, said monomer three-phase common mode inductance L1 is the magnet ring inductance that adopts the iron-based amorphous nanometer crystalline core material making of high permeability.
3. the described electromagnetic interference filter circuit of root claim 1 is characterized in that, said X capacitor C X1, CX2, CX3, CX4, CX5, CX6 are identical, and said Y capacitor C Y1, CY2, CY3 are identical, and said resistance R 1, R2, R3 are all identical.
4. the described electromagnetic interference filter circuit of root claim 1; It is characterized in that; Also comprise: public terminal GND and ground wire PE; Wherein, isolate through insulation cushion between said public terminal GND and the said ground wire PE or directly link to each other, and the other end of said Y capacitor C Y1, CY2, CY3 connects said public terminal GND respectively.
5. an electromagnetic interference filter circuit is characterized in that, comprising: monomer three-phase common mode inductance L1, and X capacitor C X1, CX2, CX3, CX4, CX5, CX6, Y capacitor C Y1, resistance R 1, R2, R3, R4, and public terminal GND, wherein,
The end of said monomer three-phase common mode inductance L1 is connected to three-phase alternating current input R, S, T respectively; The other end of said monomer three-phase common mode inductance L1 is connected to three-phase alternating current output U, V, W respectively; The end of said X capacitor C X1, CX2, CX3 respectively with said three-phase alternating current input T, S, R; The other end of said X capacitor C X1, CX2, CX3 links together jointly; Said X capacitor C X4, CX5, CX6 link to each other with said three-phase alternating current output W, V, U respectively with a end after said resistance R 1, R2, R3 are in parallel respectively; Said X capacitor C X4, CX5, CX6 all link to each other with Y capacitor C Y1 with the other end after said resistance R 1, R2, R3 are in parallel respectively, and said Y capacitor C Y1 is parallelly connected with said resistance R 4, and after parallel connection, inserts said public terminal GND with said resistance R 4.
6. electromagnetic interference filter circuit according to claim 5 is characterized in that, the magnet ring inductance that said monomer three-phase common mode inductance L1 adopts the iron-based amorphous nanometer crystalline core material of high permeability to make.
7. electromagnetic interference filter circuit according to claim 5 is characterized in that, said X capacitor C X1, CX2, CX3, CX4, CX5, CX6 are identical, and said resistance R 1, R2, R3, R4 are all identical.
8. the described electromagnetic interference filter circuit of root claim 5 is characterized in that, also comprises: ground wire PE, wherein, isolate through insulation cushion between said public terminal GND and the said ground wire PE or directly link to each other.
9. an electromagnetic interference filter is characterized in that, comprising: like each described electromagnetic interference filter circuit, current-carrying copper bar portion, grounding parts, installation portion in the claim 1 to 4, wherein,
One end of said current-carrying copper bar portion is connected with three-phase alternating current input R, S, T; The other end of said current-carrying copper bar portion is connected with three-phase alternating current output U, V, W, and the area size of said current-carrying copper bar portion and the input current of three-phase alternating current input R, S, T be big or small to become positive correlation;
Said grounding parts comprises first earth element and second earth element, and said first earth element is connected with ground wire, and said second earth element links to each other with Y electric capacity;
Said installation portion comprises bottom surface installation elements and side installation elements, and said bottom surface installation elements is installed on the bottom surface of said electromagnetic interference filter, and said side installation elements is installed on the side of said electromagnetic interference filter.
10. electromagnetic interference filter according to claim 9 is characterized in that, also comprises: the insulation support portion, said insulation support portion is installed in the two ends of said electromagnetic interference filter.
11. an electromagnetic interference filter is characterized in that, comprising: like each described electromagnetic interference filter circuit in the claim 5 to 8, current-carrying copper bar portion, grounding parts, installation portion, wherein,
One end of said current-carrying copper bar portion is connected with three-phase alternating current input R, S, T; The other end of said current-carrying copper bar portion is connected with three-phase alternating current output U, V, W, and the area size of said current-carrying copper bar portion and the input current of three-phase alternating current input R, S, T be big or small to become positive correlation;
Said grounding parts comprises first earth element and second earth element, and said first earth element is connected with ground wire, and said second earth element links to each other with Y electric capacity;
Said installation portion comprises bottom surface installation elements and side installation elements, and said bottom surface installation elements is installed on the bottom surface of said electromagnetic interference filter, and said side installation elements is installed on the side of said electromagnetic interference filter.
12. electromagnetic interference filter according to claim 11 is characterized in that, also comprises: the insulation support portion, said insulation support portion is installed in the two ends of said electromagnetic interference filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220113094XU CN202550866U (en) | 2012-03-22 | 2012-03-22 | Electromagnetic interference filter circuit and device with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220113094XU CN202550866U (en) | 2012-03-22 | 2012-03-22 | Electromagnetic interference filter circuit and device with same |
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| Publication Number | Publication Date |
|---|---|
| CN202550866U true CN202550866U (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220113094XU Expired - Fee Related CN202550866U (en) | 2012-03-22 | 2012-03-22 | Electromagnetic interference filter circuit and device with same |
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| Country | Link |
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| CN (1) | CN202550866U (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102969999A (en) * | 2012-11-22 | 2013-03-13 | 西安开容电子技术有限责任公司 | Communication bus filter |
| CN103516183A (en) * | 2013-09-30 | 2014-01-15 | 无锡洲翔成套焊接设备有限公司 | Spraying power supply three-phase filter |
| CN104052251A (en) * | 2013-03-13 | 2014-09-17 | 雅达电子国际有限公司 | Power Supply Systems With Filters |
| CN107196494A (en) * | 2017-06-16 | 2017-09-22 | 上海辛格林纳新时达电机有限公司 | Leakage current absorption plant and application of frequency converter system in a kind of frequency convertor system |
| CN107528466A (en) * | 2016-06-20 | 2017-12-29 | 艾默生网络能源有限公司 | A kind of EMI filter circuit |
| CN109742940A (en) * | 2018-12-17 | 2019-05-10 | 深圳和而泰智能控制股份有限公司 | Promote the method and detection device of electromagnetic oven coffee machine Electro Magnetic Compatibility |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102969999A (en) * | 2012-11-22 | 2013-03-13 | 西安开容电子技术有限责任公司 | Communication bus filter |
| CN104052251A (en) * | 2013-03-13 | 2014-09-17 | 雅达电子国际有限公司 | Power Supply Systems With Filters |
| CN104052251B (en) * | 2013-03-13 | 2018-04-06 | 雅达电子国际有限公司 | Power-supply system with wave filter |
| CN103516183A (en) * | 2013-09-30 | 2014-01-15 | 无锡洲翔成套焊接设备有限公司 | Spraying power supply three-phase filter |
| CN107528466A (en) * | 2016-06-20 | 2017-12-29 | 艾默生网络能源有限公司 | A kind of EMI filter circuit |
| CN107528466B (en) * | 2016-06-20 | 2019-08-23 | 维谛技术有限公司 | A kind of EMI filter circuit |
| CN107196494A (en) * | 2017-06-16 | 2017-09-22 | 上海辛格林纳新时达电机有限公司 | Leakage current absorption plant and application of frequency converter system in a kind of frequency convertor system |
| CN111181413A (en) * | 2018-11-13 | 2020-05-19 | 罗克韦尔自动化技术公司 | Power conversion system and filter for the same |
| EP3654511A1 (en) * | 2018-11-13 | 2020-05-20 | Rockwell Automation Technologies, Inc. | Power conversion system and filter therefor |
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| CN109742940A (en) * | 2018-12-17 | 2019-05-10 | 深圳和而泰智能控制股份有限公司 | Promote the method and detection device of electromagnetic oven coffee machine Electro Magnetic Compatibility |
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