CN105281559A - Electromagnetic interference suppression structure and electrical energy converter provided with same - Google Patents
Electromagnetic interference suppression structure and electrical energy converter provided with same Download PDFInfo
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- CN105281559A CN105281559A CN201510848786.7A CN201510848786A CN105281559A CN 105281559 A CN105281559 A CN 105281559A CN 201510848786 A CN201510848786 A CN 201510848786A CN 105281559 A CN105281559 A CN 105281559A
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Abstract
The invention relates to an electromagnetic interference suppression structure and an electrical energy converter provided with same, wherein the electromagnetic interference suppression structure comprises at least two capacitors that are in serial connection; the two ends of each capacitor in serial connection are respectively connected to an alternating-current input line of the electrical energy converter; the middle connecting point of the capacitors that are in serial connection is connected to an electrical connecting point that can be connected in a power conversion circuit, for providing a new current loop for electromagnetic noise in the electrical energy converter, thereby greatly lessening the transmission loop area of the electromagnetic noise and significantly decreasing the influence of the electromagnetic noise to the outside; and at the same time, the current is not leaked without adding safety regulation requirements.
Description
Technical field
The present invention relates to electromagnetic interference suppression circuit, particularly a kind of electromagnetic interference suppresses structure and has the electrical energy transformer of this structure.
Background technology
In the electrical energy transformers such as Switching Power Supply, LED driver, LED lamp, inverter, battery charger, charging pile, power supply adaptor, medical power supply, Medical Devices, communication power supply and communication apparatus; for suppressing the electromagnetic noise that in electrical energy transformer, semiconductor switch device high-frequency work produces; usually Y capacitance can be passed through; the electromagnetic noise filtering devices such as X electric capacity, common mode inductance and differential mode inductance carry out filtering; suppress the electromagnetic interference influence of its environment to external world, meet relevant electromagnetic compatibility laws and regulations requirement.
For the electrical energy transformer exchanging input, can be divided into according to AC input modes: the input of I class and the input of II class, wherein the input of I class is made up of AC input lines and ground wire, and the input of II class is only made up of AC input lines.
A) I class electrical energy transformer
I class electrical energy transformer as shown in Figure 1, by being simplified to two parts: I class electromagnetic interface filter and power conversion (PowerConverter) circuit form.The interchange input of I class electrical energy transformer comprises AC input lines and the earth; 3, the left side input 1,2 and 3 of electromagnetic interface filter is connected to AC input lines and the earth respectively; Output 4,5 and 6 on the right side of electromagnetic interface filter is connected to the input 1,2 and 3 of power conversion circuit respectively; Then power conversion circuit output 4 is connected load with 5, provides required electric energy.
I class electromagnetic interface filter in I class electrical energy transformer adopts I class single-stage EMI filter circuit unit usually, as shown in Figure 2, or I class plural serial stage EMI filter circuit unit, as shown in Figure 3.
As shown in Figure 2, by 3 input ports 1,2 and 3 and 3 output ports 4,5, and 6 form I class single-stage EMI filter circuit unit typical structure, and input port 3 and output port 6 are all connected to geodesic.I class single-stage EMI filter circuit unit comprises electric capacity CY1, CY2, CY3, CY4, CX1, CX2, inductance L 1 and inductance L 2, wherein inductance L 1 and inductance L 2 can work independently, also can be coupled with magnetic core, form differential mode inductance, common mode inductance or difference common mode inductance.Above-mentioned device CY1, CY2, CY3, CY4, CX1, CX2, inductance L 1 and inductance L 2 can work alone, and realize EMI noise filter function.When above-mentioned device works alone, other electric capacity substitutes in the mode of open circuit, and other inductance substitutes with short-circuit line.
The input 1 of I class single-stage EMI filter circuit unit is connected to the tie point of electric capacity CY1, electric capacity CX1 and inductance L 1; The input 2 of I class single-stage EMI filter circuit unit is connected to the tie point of electric capacity CY2, electric capacity CX1 and inductance L 2; The input 3 of I class single-stage EMI filter circuit unit is connected to the tie point of electric capacity CY1 and electric capacity CY2, and the tie point of electric capacity CY3 and electric capacity CY4 and output port 6; The output 4 of I class single-stage EMI filter circuit unit is connected to the tie point of electric capacity CY3, electric capacity CX2 and inductance L 1; The output 5 of I class single-stage EMI filter circuit unit is connected to the tie point of electric capacity CY4, electric capacity CX2 and inductance L 2.
The circuit of the formation of electric capacity CY1, CY2, CY3 and CY4 in dotted line frame in the I class single-stage EMI filter circuit unit shown in Fig. 2, for providing the noise current loop in rear class power conversion circuit high-frequency noises source, to reduce the electromagnetic interference of the noise source in electrical energy transformer to outside.
Increase electric capacity CY1, CY2, CY3 and CY4 capacity in I class single-stage EMI filter circuit unit can noise decrease source to the electromagnetic interference of outside, but electrical energy transformer leakage current over the ground can be increased.Due in demand fulfillment safety standard to the restriction of leakage current, therefore in above-mentioned I class single-stage EMI filter circuit unit, the capacitance size of direct-to-ground capacitance CY1, CY2, CY3 and CY4 is just restricted, thus cause the capacitance of above-mentioned electric capacity CY1, CY2, CY3 and CY4 unrestrictedly not increase, cause the I class electrical energy transformer noise suppressed difficulty shown in Fig. 1, just need to increase by 1 grade or multistage electromagnetic interface filter again, cause small product size to increase, efficiency reduces, cost up.
Fig. 3 is the EMI filter circuit unit of I class plural serial stage, I class single-stage EMI filter circuit units in series as shown in Figure 2 forms, and wherein the input 1,2 of I class single-stage EMI filter circuit unit (1) is connected with geodesic (Earth) with AC input lines respectively with 3; The output 4,5 of I class single-stage EMI filter circuit unit (1) is connected with 3 respectively at the input 1,2 of I class EMI filter circuit unit (2) with 6; The output 4,5 of I class single-stage EMI filter circuit unit (2) is connected with 3 respectively at the input 1,2 of follow-up I class EMI filter circuit unit (n) with 6; The output 4,5 and 6 of follow-up I class single-stage EMI filter circuit unit (n) again with the input 1 of follow-up power conversion circuit, 2 are connected with 3.
The same with I class single-stage electromagnetic interface filter, there is more direct-to-ground capacitance in the EMI filter circuit unit of I class plural serial stage, cause larger leakage current, therefore, the capacitance size of its direct-to-ground capacitance is subject to the restriction of leakage current in safety regulations, causes the I class electrical energy transformer noise suppressed difficulty shown in Fig. 1, just need to increase more multistage electromagnetic interface filter again, cause small product size to increase, efficiency reduces, cost up.
B) II class electrical energy transformer
II class electrical energy transformer as shown in Figure 4, is made up of two parts: electromagnetic interface filter and power conversion circuit form.The interchange input of II class electrical energy transformer only includes AC input lines; 2, the left side input 1 and 2 of electromagnetic interface filter is connected to AC input lines respectively; Output 4 and 5 on the right side of electromagnetic interface filter is connected to the input 1 and 2 of power conversion circuit respectively; Then power conversion circuit output 4 is connected load with 5, provides required electric energy.
II class single-stage EMI filter circuit unit typical structure as shown in Figure 5, is made up of 2 input ports 1 and 2 and 2 output ports 4 and 5.II class single-stage EMI filter circuit unit comprises electric capacity CX1, CX2, inductance L 1 and inductance L 2, and wherein inductance L 1 and inductance L 2 can work independently, and also can be coupled with magnetic core, forms 1 differential mode inductance, common mode inductance or difference common mode inductance.Above-mentioned device CX1, CX2, inductance L 1 and inductance L 2 can work alone, and realize EMI noise filter function.When above-mentioned device works alone, other electric capacity substitutes in the mode of open circuit, and other inductance substitutes with short-circuit line.
The input 1 of II class single-stage EMI filter circuit unit is connected to the tie point of electric capacity CX1 and inductance L 1; The input 2 of II class single-stage EMI filter circuit unit is connected to the tie point of electric capacity CX1 and inductance L 2; The output 4 of II class single-stage EMI filter circuit unit is connected to the tie point of electric capacity CX2 and inductance L 1; The output 5 of II class single-stage EMI filter circuit unit is connected to the tie point of electric capacity CX2 and inductance L 2.
II class electrical energy transformer shown in Fig. 4, is suppressed by the electromagnetic interference in electric capacity CX1, CX2, inductance L 1 and inductance L 2 pairs of rear class power conversion circuit high-frequency noises sources.The inhibition to high frequency electromagnetic noise can be strengthened by increase capacitance and inductance value.But the requirement of power down time limits the capacity increase of electric capacity CX1 and CX2 in safety requirement, cause the class of II shown in Fig. 4 electrical energy transformer noise suppressed difficulty, just need to increase by 1 grade again or multistage electromagnetic interface filter suppresses, but the volume of product, weight and cost can be increased, reduce transformation of electrical energy efficiency simultaneously.
When II class single-stage EMI filter circuit unit can not meet requirement of noise, the multistage EMI filter circuit unit of II class is suggested to the requirement meeting electromagnetic noise suppression, as shown in Figure 6.II class multistage EMI filter circuit unit is formed by multiple II class single-stage EMI filter circuit units in series, and wherein the input 1 of II class single-stage EMI filter circuit unit (1) is connected with AC input lines respectively with 2; The output 4 of II class single-stage EMI filter circuit unit (1) is connected with 2 with the input 1 of II class single-stage EMI filter circuit unit (2) respectively with 5; The output 4 of II class single-stage EMI filter circuit unit (2) is connected with 2 with the input 1 of follow-up II class single-stage EMI filter circuit unit (n) respectively with 5; The output of follow-up II class single-stage EMI filter circuit unit (n) is connected with 2 with the input 1 of follow-up power conversion circuit again, provides and needs electric energy.
When the multistage EMI filter circuit unit of the II class shown in Fig. 6 is applied in product, but there is the electric capacity be more connected across between live wire and zero line in the program, cause longer discharge time, for meeting the requirement of discharge time, the capacity of electric capacity just cannot unrestrictedly increase; Multistage inductance further increases the increase causing small product size, weight and cost, and transformation of electrical energy efficiency declines further simultaneously.
Summary of the invention
Large and the inefficient weak point of electrical energy transformer of the leakage problem caused for existing electromagnetic noise suppression technology in above-mentioned I class and II class electrical energy transformer, discharge time, volume, the present invention proposes the electrical energy transformer that a kind of electromagnetic interference suppresses structure and has this structure, it does not need just to provide current circuit directly to the high-frequency noise in power conversion circuit by geodesic, significantly reduces the propagation circuit area of electromagnetic noise; Meeting electromagnetic compatibility regulation under electromagnetic interference and safety requirement, reducing the Ground leakage current in electrical energy transformer on the one hand significantly, not affecting the conversion efficiency of electric energy on the other hand, and the reduction of small product size.After optimizing, even can exempt the Ground leakage current of electrical energy transformer, improve transformation of electrical energy efficiency, reduce small product size further.And the present invention is applicable to existing electromagnetic interface filter structure, electromagnetic noise can be suppressed in the situation not revising existing electromagnetic interface filter structure, meet the laws and regulations requirement of electromagnetic compatibility, can also simplify further and optimize electromagnetic interface filter structure, reduce leakage current, reduce device, smaller size smaller and raising transformation of electrical energy efficiency.
For achieving the above object, the present invention realizes like this.
A kind of electromagnetic interference suppresses structure, it is characterized in that: it comprises at least two the electric capacity C1 and electric capacity C2 that are connected in series; The two ends of described electric capacity C1 and electric capacity C2 connect in series structure have the contact being connected to AC input lines respectively; Tie point between described electric capacity C1 and electric capacity C2 is the contact be connected with the electric connecting point of follow-up power conversion circuit; The capacitive reactances device of described electric capacity C1 and electric capacity C2 available equivalents substitutes.
Above-mentioned electric capacity C1 and electric capacity C2 is the electric capacity of any structure.
A kind of electrical energy transformer, it comprises electromagnetic interface filter and power conversion circuit; It is characterized in that: it also comprises electromagnetic interference as above and suppresses structure; Described electromagnetic interference suppresses the electric capacity C1 of structure to be connected AC input lines respectively with the two ends of electric capacity C2 connect in series structure; Tie point between described electric capacity C1 and electric capacity C2 is connected with the electric connecting point of follow-up power conversion circuit; The capacitive reactances device of described electric capacity C1 and electric capacity C2 available equivalents substitutes.
Described electrical energy transformer, is characterized in that: described power conversion circuit comprises rectifier bridge, and the tie point between described electric capacity C1 and electric capacity C2 is connected with the negative terminal of rectifier bridge; The capacitive reactances device of described electric capacity C1 and electric capacity C2 available equivalents substitutes.
Described electrical energy transformer, is characterized in that: described power conversion circuit comprises rectifier bridge, and the tie point between described electric capacity C1 and electric capacity C2 is connected with the anode of rectifier bridge; The capacitive reactances device of described electric capacity C1 and electric capacity C2 available equivalents substitutes.
Described electrical energy transformer, is characterized in that: described power conversion circuit comprises rectifier bridge, and the tie point between described electric capacity C1 and electric capacity C2 is connected with the electric connecting point of follow-up power conversion circuit; The capacitive reactances device of described electric capacity C1 and electric capacity C2 available equivalents substitutes.
After the electromagnetic interference applying the present invention's proposition in electrical energy transformer suppresses structure, the electromagnetic interface filter in electrical energy transformer can be optimized further, (in electromagnetic interface filter) can be reduced and be connected across capacitance between AC input lines, even can save; In the application of I class electrical energy transformer, (in electromagnetic interface filter) can be reduced further and be connected across capacitance between AC input lines and ground wire, even can save.
Accompanying drawing explanation
Fig. 1 is existing I class electrical energy transformer frame diagram.
Fig. 2 is single-stage EMI filter circuit cellular construction figure in existing I class electrical energy transformer.
Fig. 3 is the EMI filter circuit cellular construction figure of plural serial stage in existing I class electrical energy transformer.
Fig. 4 is existing II class electrical energy transformer frame diagram.
Fig. 5 is single-stage EMI filter circuit cellular construction figure in existing II class electrical energy transformer.
Fig. 6 is multistage EMI filter circuit cellular construction figure in existing II class electrical energy transformer.
Fig. 7 is the structure chart that electromagnetic interference of the present invention suppresses structure.
Fig. 8 is the structure chart of the embodiment of the present invention 1.
Fig. 9 is the structure chart of the embodiment of the present invention 2.
Figure 10 is the structure chart of the embodiment of the present invention 3.
Figure 11 is the structure chart of the embodiment of the present invention 4.
Figure 12 is the structure chart of the embodiment of the present invention 5.
Figure 13 is the structure chart of the embodiment of the present invention 6.
Embodiment
Refer to Fig. 7, the present invention proposes a kind of electromagnetic interference and suppresses structure.As shown in the figure: it comprises electric capacity C1 and electric capacity C2, described electric capacity C1 and electric capacity C2 is connected in series; The two ends of described electric capacity C1 and electric capacity C2 connect in series structure have the contact being connected to AC input lines respectively; Tie point between described electric capacity C1 and electric capacity C2 is the contact be connected with the electric connecting point of follow-up power conversion circuit.Above-mentioned electric capacity C1 and electric capacity C2 is the electric capacity of any structure.The capacitive reactances device of described electric capacity C1 and electric capacity C2 available equivalents substitutes.
Above-mentioned electromagnetic interference suppresses structure to be mainly used in the electrical energy transformer exchanging input, we in the accompanying drawing of embodiment using Reference numeral M as the mark of this structure.Such as: Fig. 8 is that electromagnetic interference of the present invention suppresses the application of structure in I class electrical energy transformer, Fig. 9 is that electromagnetic interference of the present invention suppresses the application of structure in II class electrical energy transformer.
The present invention is introduced further below by way of multiple embodiment.
Embodiment 1
It is on the basis of the I class electrical energy transformer shown in Fig. 1, electromagnetic interference of the present invention is suppressed to the Application Example of structure M.As shown in Figure 8: electromagnetic interference suppresses 1 end of structure M to be connected to the tie point of the power conversion circuit input 1 of electromagnetic interface filter output 4 and rear class in I class electrical energy transformer; Electromagnetic interference suppresses 2 ends of structure M to be connected to the tie point of the power conversion circuit input 2 of electromagnetic interface filter output 5 and rear class in I class electrical energy transformer; Electromagnetic interference suppresses 3 ends of structure M to be connected to a tie point that can be electrically connected 7 in the power conversion circuit of rear class.
The present embodiment 1, the electromagnetic noise suppression circuit proposed is that electromagnetic noise provides new high frequency noise current internal loop, greatly reduce the propagation circuit area of electromagnetic noise current, significantly reduce the impact of electromagnetic noise External Environment, leakage current can not be increased simultaneously, do not increase volume, nor affect power change efficiency.
Embodiment 2
It is on the basis of the II class electrical energy transformer shown in Fig. 4, electromagnetic interference of the present invention is suppressed to the Application Example of structure M.As shown in Figure 9: electromagnetic interference suppresses 1 end of structure M to be connected to the tie point of the power conversion circuit input 1 of electromagnetic interface filter output 4 and rear class in I class electrical energy transformer; Electromagnetic interference suppresses 2 ends of structure M to be connected to the tie point of the power conversion circuit input 2 of electromagnetic interface filter output 5 and rear class in I class electrical energy transformer; Electromagnetic interference suppresses 3 ends of structure M to be connected to a tie point that can be electrically connected 7 in the power conversion circuit of rear class.
The present embodiment 2, the electromagnetic noise suppression circuit proposed is that electromagnetic noise provides new high frequency noise current internal loop, greatly reduce the propagation circuit area of electromagnetic noise current, significantly reduce the impact of electromagnetic noise External Environment, leakage current can not be increased simultaneously, do not increase volume, nor affect power change efficiency.
Embodiment 3
Figure 10 is that electromagnetic interference of the present invention suppresses structure M to be applied to the another kind of embodiment of I class electrical energy transformer.Wherein, electromagnetic interference suppresses 1 end of structure M to be connected to the tie point of electromagnetic interface filter output 4 and rear class power conversion circuit input 1 in I class electrical energy transformer; Rear class power conversion circuit input 1 is connected with the rectifier bridge ac input end 10 of its inside; Electromagnetic interference suppresses 2 ends of structure M to be connected to the tie point of electromagnetic interface filter output 5 and rear class power conversion circuit input 2 in I class electrical energy transformer; The input 2 of rear class power conversion circuit is connected with the rectifier bridge ac input end 11 of its inside; Electromagnetic interference suppresses 3 ends of structure M to be connected with the negative terminal 7 of rectifier bridge B1 in rear class power conversion circuit; In the power conversion circuit of rear class, the anode 8 of rectifier bridge B1 is connected with the internal circuit of power conversion circuit respectively with negative terminal 7.
The present embodiment 3, the electromagnetic noise suppression circuit proposed is that electromagnetic noise provides new high frequency noise current internal loop, greatly reduce the propagation circuit area of electromagnetic noise current, significantly reduce the impact of electromagnetic noise External Environment, leakage current can not be increased simultaneously, do not increase volume, nor affect power change efficiency.
Embodiment 4
Figure 11 is that electromagnetic interference of the present invention suppresses structure M to be applied to another embodiment of I class electrical energy transformer.Wherein, electromagnetic interference suppresses 1 end of structure M to be connected to the tie point of electromagnetic interface filter output 4 and rear class power conversion circuit input 1 in I class electrical energy transformer; Rear class power conversion circuit input 1 is connected with the rectifier bridge ac input end 10 of its inside; Electromagnetic interference suppresses 2 ends of structure M to be connected to the tie point of electromagnetic interface filter output 5 and rear class power conversion circuit input 2 in I class electrical energy transformer; The input 2 of rear class power conversion circuit is connected with the rectifier bridge ac input end 11 of its inside; Electromagnetic interference suppresses 3 ends of structure M to be connected with the anode 8 of rectifier bridge B1 in rear class power conversion circuit; In the power conversion circuit of rear class, the anode 8 of rectifier bridge B1 is connected with the internal circuit of power conversion circuit more respectively with negative terminal 7.
The present embodiment 4, the electromagnetic noise suppression circuit proposed is that electromagnetic noise provides new high frequency noise current internal loop, greatly reduce the propagation circuit area of electromagnetic noise current, significantly reduce the impact of electromagnetic noise External Environment, leakage current can not be increased simultaneously, do not increase volume, nor affect power change efficiency.
Embodiment 5
Figure 12 is that electromagnetic interference of the present invention suppresses structure M to be applied to another embodiment of II electrical energy transformer.Wherein, electromagnetic interference suppresses 1 end of structure M to be connected to the tie point of electromagnetic interface filter output 4 and rear class power conversion circuit input 1 in II class electrical energy transformer; Rear class power conversion circuit input 1 is connected with the rectifier bridge ac input end 10 of its inside; Electromagnetic interference suppresses 2 ends of structure M to be connected to the tie point of electromagnetic interface filter output 5 and rear class power conversion circuit input 2 in II class electrical energy transformer; The input 2 of rear class power conversion circuit is connected with the rectifier bridge ac input end 11 of its inside; Electromagnetic interference suppresses 3 ends of structure M to be connected with the negative terminal 7 of rectifier bridge B1 in rear class power conversion circuit; In the power conversion circuit of rear class, the anode 8 of rectifier bridge B1 is connected with the internal circuit of power conversion circuit more respectively with negative terminal 7.
The present embodiment 5, the electromagnetic noise suppression circuit proposed is that electromagnetic noise provides new high frequency noise current internal loop, greatly reduce the propagation circuit area of electromagnetic noise current, significantly reduce the impact of electromagnetic noise External Environment, leakage current can not be increased simultaneously, do not increase volume, nor affect power change efficiency.
Embodiment 6
Figure 13 is that electromagnetic interference of the present invention suppresses structure M to be applied to another embodiment of II electrical energy transformer.Wherein, electromagnetic interference suppresses 1 end of structure M to be connected to the tie point of electromagnetic interface filter output 4 and rear class power conversion circuit input 1 in II class electrical energy transformer; Rear class power conversion circuit input 1 is connected with the rectifier bridge ac input end 10 of its inside; Electromagnetic interference suppresses 2 ends of structure M to be connected to the tie point of electromagnetic interface filter output 5 and rear class power conversion circuit input 2 in II class electrical energy transformer; The input 2 of rear class power conversion circuit is connected with the rectifier bridge ac input end 11 of its inside; Electromagnetic interference suppresses 3 ends of structure M to be connected with the anode 8 of rectifier bridge B1 in rear class power conversion circuit; In the power conversion circuit of rear class, the anode 8 of rectifier bridge B1 is connected with the internal circuit of power conversion circuit more respectively with negative terminal 7.
The present embodiment 6, the electromagnetic noise suppression circuit proposed is that electromagnetic noise provides new high frequency noise current internal loop, greatly reduce the propagation circuit area of electromagnetic noise current, significantly reduce the impact of electromagnetic noise External Environment, leakage current can not be increased simultaneously, do not increase volume, nor affect power change efficiency.
Be only preferred embodiment of the present invention in sum, be not used for limiting practical range of the present invention.Namely all equivalences done according to the content of the present patent application the scope of the claims change and modify, and all should be technology category of the present invention.
Claims (5)
1. electromagnetic interference suppresses a structure, it is characterized in that: it comprises at least two the electric capacity C1 and electric capacity C2 that are connected in series; The two ends of described electric capacity C1 and electric capacity C2 connect in series structure have the contact being connected to AC input lines respectively; Tie point between described electric capacity C1 and electric capacity C2 is the contact be connected with the electric connecting point of follow-up power conversion circuit; The capacitive reactances device of described electric capacity C1 and electric capacity C2 available equivalents substitutes.
2. an electrical energy transformer, it comprises electromagnetic interface filter and power conversion circuit; It is characterized in that: it also comprises electromagnetic interference as claimed in claim 1 and suppresses structure; Described electromagnetic interference suppresses the electric capacity C1 of structure to be connected AC input lines respectively with the two ends of electric capacity C2 connect in series structure; Tie point between described electric capacity C1 and electric capacity C2 is connected with the electric connecting point of follow-up power conversion circuit; The capacitive reactances device of described electric capacity C1 and electric capacity C2 available equivalents substitutes.
3. electrical energy transformer according to claim 2, is characterized in that: described power conversion circuit comprises rectifier bridge, and the tie point between described electric capacity C1 and electric capacity C2 is connected with the negative terminal of rectifier bridge; The capacitive reactances device of described electric capacity C1 and electric capacity C2 available equivalents substitutes.
4. electrical energy transformer according to claim 2, is characterized in that: described power conversion circuit comprises rectifier bridge, and the tie point between described electric capacity C1 and electric capacity C2 is connected with the anode of rectifier bridge; The capacitive reactances device of described electric capacity C1 and electric capacity C2 available equivalents substitutes.
5. electrical energy transformer according to claim 2, is characterized in that: described power conversion circuit comprises rectifier bridge, and the tie point between described electric capacity C1 and electric capacity C2 is connected with the electric connecting point of follow-up power conversion circuit; The capacitive reactances device of described electric capacity C1 and electric capacity C2 available equivalents substitutes.
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| CN201510848786.7A CN105281559B (en) | 2015-11-27 | 2015-11-27 | A kind of electromagnetic interference inhibition structure and the electrical energy transformer with the structure |
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| CN201510848786.7A CN105281559B (en) | 2015-11-27 | 2015-11-27 | A kind of electromagnetic interference inhibition structure and the electrical energy transformer with the structure |
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| CN205160367U (en) * | 2015-11-27 | 2016-04-13 | 黄敏超 | Electromagnetic interference suppressing structure and electric energy converter that has this structure |
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Effective date of registration: 20180905 Address after: 201201 Pudong New Area, Shanghai, China (Shanghai) free trade trial area, No. 1999, 3 Jinxiu East Road, 431 room. Patentee after: Min Ye information technology (Shanghai) Co., Ltd. Address before: 200135 302, 23 Lane 199 lane, Bi Yun Road, Pudong New Area, Shanghai. Patentee before: Huang Minchao |