CN206023721U - A kind of electromagnetic compatibility filter circuit - Google Patents
A kind of electromagnetic compatibility filter circuit Download PDFInfo
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- CN206023721U CN206023721U CN201620911482.0U CN201620911482U CN206023721U CN 206023721 U CN206023721 U CN 206023721U CN 201620911482 U CN201620911482 U CN 201620911482U CN 206023721 U CN206023721 U CN 206023721U
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Abstract
本实用新型提供一种电磁兼容滤波电路，其输入端正极至滤波电路输出端正极方向依次串联共模电感L1A、共模电感L2A与电感L3；从滤波电路的输入端负极至滤波电路的输出端负极方向依次串联有共模电感L1B、共模电感L2B与电感L4；在滤波电路的输入端至输出端之间还串联有保险丝F1；在滤波电路的输入端并联有差模电容CX1；共模电感L1A及共模电感L1B的另一端分别与差模电容CX2的两端相连；共模电感L2A及共模电感L2B的另一端分别与差模电容CX3的两端相连；差模电容CX1、差模电容CX2或差模电容CX3的其中一个还并联有电阻R1；本实用新型的优点是滤波性能好，具有过流过压保护功能。
The utility model provides an electromagnetic compatibility filter circuit, the direction from the positive pole of the input end to the positive pole of the output end of the filter circuit is sequentially connected in series with a common mode inductor L1A, a common mode inductor L2A and an inductor L3; from the negative pole of the input end of the filter circuit to the output end of the filter circuit In the negative direction, there are common mode inductor L1B, common mode inductor L2B and inductor L4 connected in series in sequence; a fuse F1 is connected in series between the input terminal and the output terminal of the filter circuit; a differential mode capacitor CX1 is connected in parallel at the input terminal of the filter circuit; The other ends of inductor L1A and common mode inductor L1B are respectively connected to both ends of differential mode capacitor CX2; the other ends of common mode inductor L2A and common mode inductor L2B are respectively connected to both ends of differential mode capacitor CX3; differential mode capacitor CX1, differential One of the mode capacitor CX2 or the differential mode capacitor CX3 is also connected in parallel with a resistor R1; the utility model has the advantages of good filter performance and over-current and over-voltage protection function.
Description
Technical field
This utility model is related to field of electromagnetic compatibility, and in particular to a kind of electromagnetic compatibility filter circuit.
Background technology
In many applications, electronic equipment is required for the purpose for realizing electromagnetic compatibility, using electromagnetic screen
Have to use wave filter simultaneously, these wave filter generally comprise traffic filter and power-supply filter；Power-supply filter is one
Passive bidirectional network is planted, is connected between power supply and load, for the wave band by particular range frequency in power supply；Patent document
CN203104377U proposes a kind of electromagnet Compatibility filter, and its scheme for adopting has problems with：It is connected with output
Part connect only with two-stage inductance, easily absorb external electromagnetism clutter in filter circuit back segment, it is difficult to filtering interfering, another
Aspect, the electromagnetic compatibility wave filter lack excessively stream and over-voltage protecting function, when input voltage exceedes rated voltage with load or circuit
When electric current is excessive, the use of back segment load will be badly influenced；It is therefore desirable to a kind of new electromagnetic compatibility filter circuit of design.
Utility model content
Deficiency in the presence of for prior art, this utility model provide a kind of electricity with excessively stream and overvoltage protection
Magnetic compatibility filter circuit.
For achieving the above object, this utility model employs following technical scheme：
A kind of electromagnetic compatibility filter circuit, its input and outfan are respectively comprising positive pole and negative pole；It is characterized in that：From
The output head anode direction of the input anode of filter circuit to filter circuit is sequentially connected in series common mode inductance L1A, common mode inductance L2A
With inductance L3；Common mode inductance has been sequentially connected in series from the negative pole of output end direction of the input cathode to filter circuit of filter circuit
L1B, common mode inductance L2B and inductance L4；In the input of filter circuit to being also in series with electric fuse F1 between outfan；Common mode electricity
Sense L1A shares a magnet ring respectively with common mode inductance L1B, common mode inductance L2A and common mode inductance L2B；Input in filter circuit
End is parallel with differential mode capacitor CX1；The two ends of differential mode capacitor CX1 one end phase respectively with common mode inductance L1A and common mode inductance L1B
Even, the other end of common mode inductance L1A and common mode inductance L1B is connected with the two ends of differential mode capacitor CX2 respectively, and and common mode inductance
One end of L2A and common mode inductance L2B is connected；The other end of common mode inductance L2A and common mode inductance L2B respectively with differential mode capacitor CX3
Two ends be connected；One of them of differential mode capacitor CX1, differential mode capacitor CX2 or differential mode capacitor CX3 is also parallel with resistance R1；Common mode
Electric capacity CY1 and common mode capacitance CY2, common mode capacitance CY3 and common mode capacitance CY4, common mode capacitance CY5 and common mode capacitance CY6 difference two
Two are connected in series, and connection end is connected with ground, and common mode capacitance CY1 of series connection and common mode capacitance CY2 are overall with differential mode capacitor CX2
Parallel connection, common mode capacitance CY3 of series connection are overall with common mode capacitance CY4 in parallel with differential mode capacitor CX3；Common mode capacitance CY5 of series connection with
Common mode capacitance CY6 is overall in parallel with the outfan of filter circuit.
Further, also include voltage limiter protection circuit, described voltage limiter protection circuit and differential mode capacitor CX1,
One of them of differential mode capacitor CX2, differential mode capacitor CX3 is in parallel.
Further, described voltage limiter protection circuit includes bi-directional voltage stabilizing diode.
Further, described common mode capacitance CY5 and common mode capacitance CY6 are feedthrough capacitor.
Further, the bi-directional voltage stabilizing Diode series have electric fuse F2.
This utility model is by the electric fuse F1 that connected in filter circuit so that when circuital current is more than electric fuse F1's
During parameter value, electric fuse F1 is burned out, so as to protect filter circuit and back segment load；When control source height occurs in input
When bi-directional voltage stabilizing diode operation magnitude of voltage, increase through bi-directional voltage stabilizing diode current, and the voltage stabilization at its two ends exists
Its operational voltage value, with the normal use for protecting back segment to load；Bi-directional voltage stabilizing pipe is in series with electric fuse F2, to protect bi-directional voltage stabilizing
Pipe is not burned out；Whole filter circuit employs multistage differential mode-common mode filtering, and the input by resistance R1 matched filtering circuits
Resistance so that the filter effect of whole circuit is more preferable.
Description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment to this utility model in technical scheme further illustrate.
As shown in figure 1, the utility model proposes a kind of electromagnetic compatibility filter circuit, its input PN and output end p ' n '
Respectively comprising positive pole and negative pole；It has been sequentially connected in series from the output head anode direction of the input anode to filter circuit of filter circuit
Common mode inductance L1A, common mode inductance L2A and inductance L3；Negative pole of output end from the input cathode to filter circuit of filter circuit
Direction has been sequentially connected in series common mode inductance L1B, common mode inductance L2B and inductance L4；Filter circuit input between outfan
Electric fuse F1 is also in series with；Common mode inductance L1A shares one respectively with common mode inductance L1B, common mode inductance L2A and common mode inductance L2B
Individual magnet ring；Differential mode capacitor CX1 is parallel with the input of filter circuit；The two ends of differential mode capacitor CX1 respectively with common mode inductance L1A
And one end of common mode inductance L1B is connected, the other end of common mode inductance L1A and common mode inductance L1B respectively with differential mode capacitor CX2 two
End is connected, and is connected with one end of common mode inductance L2A and common mode inductance L2B；Differential mode capacitor CX2 is also parallel with resistance R1；Common mode
The other end of inductance L2A and common mode inductance L2B is connected with the two ends of differential mode capacitor CX3 respectively；Common mode capacitance CY1 and common mode capacitance
CY2, common mode capacitance CY3 and common mode capacitance CY4, common mode capacitance CY5 and common mode capacitance CY6 are connected in series respectively two-by-two, and are connected
End is connected with ground, and common mode capacitance CY1 of series connection is overall with common mode capacitance CY2 in parallel with differential mode capacitor CX2, the common mode electricity of series connection
Hold CY3 overall with common mode capacitance CY4 in parallel with differential mode capacitor CX3；Common mode capacitance CY5 of series connection and common mode capacitance CY6 overall with
The outfan of filter circuit is in parallel.
Also include voltage limiter protection circuit, voltage limiter protection circuit is in parallel with differential mode capacitor CX2；Described voltage
Limiter protection circuit is bi-directional voltage stabilizing diode D, and is in series with electric fuse F2.
Described common mode capacitance CY5 and common mode capacitance CY6 are feedthrough capacitor, and without high-frequency coupling, and grounded inductor is less,
More preferable filter effect is achieved in filter circuit outfan.
By the electric fuse F1 that connected in filter circuit so that protect when circuital current is more than the parameter value of electric fuse F1
Dangerous silk F1 is burned out, so as to protect filter circuit and back segment load；When input control source occurs higher than bi-directional voltage stabilizing
During diode operation magnitude of voltage, increase through bi-directional voltage stabilizing diode current, and the voltage stabilization at its two ends is in its running voltage
Value, with the normal use for protecting back segment to load；Bi-directional voltage stabilizing pipe is in series with electric fuse F2, to protect bi-directional voltage stabilizing pipe not burnt
Ruin；When external voltage is higher than the threshold value of varistor, then varistor automatically " short circuit ", is protected so as to be formed to late-class circuit
Shield；Whole filter circuit employs multistage differential mode-common mode filtering, and the input resistance by resistance R1 matched filtering circuits, makes
The filter effect for obtaining whole circuit is more preferable.
Finally illustrate, above example is only unrestricted in order to the technical solution of the utility model to be described, although ginseng
This utility model is described in detail according to preferred embodiment, it will be understood by those within the art that, can be to this
The technical scheme of utility model is modified or equivalent, the objective and model without deviating from technical solutions of the utility model
Enclose, which all should be covered in the middle of right of the present utility model.
Claims (5)
1. a kind of electromagnetic compatibility filter circuit, its input and outfan are respectively comprising positive pole and negative pole；It is characterized in that：From filter
The output head anode direction of the input anode of wave circuit to filter circuit be sequentially connected in series common mode inductance L1A, common mode inductance L2A with
Inductance L3；From the negative pole of output end direction of the input cathode to filter circuit of filter circuit be sequentially connected in series common mode inductance L1B,
Common mode inductance L2B and inductance L4；In the input of filter circuit to being also in series with electric fuse F1 between outfan；Common mode inductance
L1A shares a magnet ring respectively with common mode inductance L1B, common mode inductance L2A and common mode inductance L2B；Input in filter circuit
It is parallel with differential mode capacitor CX1；The two ends of differential mode capacitor CX1 are connected with one end of common mode inductance L1A and common mode inductance L1B respectively,
The other end of common mode inductance L1A and common mode inductance L1B is connected with the two ends of differential mode capacitor CX2 respectively, and with common mode inductance L2A and
One end of common mode inductance L2B is connected；The other end of common mode inductance L2A and common mode inductance L2B two ends respectively with differential mode capacitor CX3
It is connected；One of them of differential mode capacitor CX1, differential mode capacitor CX2 or differential mode capacitor CX3 is also parallel with resistance R1；Common mode capacitance CY1
Two-by-two connect company is distinguished with common mode capacitance CY4, common mode capacitance CY5 with common mode capacitance CY6 with common mode capacitance CY2, common mode capacitance CY3
Connect, and connection end is connected with ground, common mode capacitance CY1 of series connection is overall with common mode capacitance CY2 in parallel with differential mode capacitor CX2, string
Common mode capacitance CY3 of connection is overall with common mode capacitance CY4 in parallel with differential mode capacitor CX3；Common mode capacitance CY5 and common mode capacitance of series connection
CY6 is overall in parallel with the outfan of filter circuit.
2. a kind of electromagnetic compatibility filter circuit according to claim 1, it is characterised in that：Also comprising voltage limited amplitude protection electricity
Road, described voltage limiter protection circuit and differential mode capacitor CX1, differential mode capacitor CX2, differential mode capacitor CX3 one of mutually simultaneously
Connection.
3. a kind of electromagnetic compatibility filter circuit according to claim 2, it is characterised in that：Described voltage limited amplitude protection electricity
Road includes bi-directional voltage stabilizing diode.
4. a kind of electromagnetic compatibility filter circuit according to claim 3, it is characterised in that：The bi-directional voltage stabilizing diode string
It is associated with electric fuse F2.
5. a kind of electromagnetic compatibility filter circuit according to claim 1 or 4, it is characterised in that：Described common mode capacitance CY5
And common mode capacitance CY6 is feedthrough capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620911482.0U CN206023721U (en) | 2016-08-22 | 2016-08-22 | A kind of electromagnetic compatibility filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620911482.0U CN206023721U (en) | 2016-08-22 | 2016-08-22 | A kind of electromagnetic compatibility filter circuit |
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| Publication Number | Publication Date |
|---|---|
| CN206023721U true CN206023721U (en) | 2017-03-15 |
Family
ID=58250182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620911482.0U Expired - Fee Related CN206023721U (en) | 2016-08-22 | 2016-08-22 | A kind of electromagnetic compatibility filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206023721U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276377A (en) * | 2017-06-06 | 2017-10-20 | 李瑞峰 | A kind of power-supply filter device |
| CN110212742A (en) * | 2019-06-20 | 2019-09-06 | 北京元六鸿远电子科技股份有限公司 | A kind of DC wave filter not generating great start-up current |
| CN111157764A (en) * | 2020-01-22 | 2020-05-15 | 北京鼎科信息有限公司 | Motor train unit acceleration sensor and detection method |
| EP4318839A4 (en) * | 2021-03-26 | 2024-10-30 | Changchun Jetty Automotive Technology Co., Ltd. | CHARGING DEVICE INTERFACE CIRCUIT AND CHARGING DEVICE |
-
2016
- 2016-08-22 CN CN201620911482.0U patent/CN206023721U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276377A (en) * | 2017-06-06 | 2017-10-20 | 李瑞峰 | A kind of power-supply filter device |
| CN107276377B (en) * | 2017-06-06 | 2019-10-29 | 李瑞峰 | A kind of power-supply filter device |
| CN110212742A (en) * | 2019-06-20 | 2019-09-06 | 北京元六鸿远电子科技股份有限公司 | A kind of DC wave filter not generating great start-up current |
| CN111157764A (en) * | 2020-01-22 | 2020-05-15 | 北京鼎科信息有限公司 | Motor train unit acceleration sensor and detection method |
| EP4318839A4 (en) * | 2021-03-26 | 2024-10-30 | Changchun Jetty Automotive Technology Co., Ltd. | CHARGING DEVICE INTERFACE CIRCUIT AND CHARGING DEVICE |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170315 |
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| CF01 | Termination of patent right due to non-payment of annual fee |