CN221150960U - Gigabit network electromagnetic protection circuit - Google Patents
Gigabit network electromagnetic protection circuit Download PDFInfo
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- CN221150960U CN221150960U CN202421056652.2U CN202421056652U CN221150960U CN 221150960 U CN221150960 U CN 221150960U CN 202421056652 U CN202421056652 U CN 202421056652U CN 221150960 U CN221150960 U CN 221150960U
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- 239000003990 capacitor Substances 0.000 claims abstract description 22
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 230000009466 transformation Effects 0.000 claims description 12
- 238000002955 isolation Methods 0.000 claims description 5
- 230000001629 suppression Effects 0.000 claims description 4
- 230000001052 transient effect Effects 0.000 claims description 4
- 230000001939 inductive effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to an electromagnetic protection circuit of a gigabit network. Comprising the following steps: the bleeder unit comprises a diode, the cathode of the diode is coupled with the input end through a coupler, and the anode of the diode is grounded; the filtering unit is provided with a first end connected with the input end and a second end used for grounding, and comprises a capacitor and an inductor, wherein one ends of the capacitor and the inductor are respectively connected with the first end, and the other ends of the capacitor and the inductor are grounded; the impedance unit comprises a 1/4 lambda line and a transformer, the input end is connected with the transformer through the 1/4 lambda line, and the 1/4 lambda line is connected with the decoupling unit through the transformer; the decoupling unit comprises a resistor, wherein one end of the resistor is connected with the transformer, and the other end of the resistor is connected with the output end; the clamping unit comprises a diode, one end of the diode is connected with the common end of the resistor R1 and the output end, and the other end of the diode is grounded. The problem that the Ethernet protection circuit cannot completely release and absorb the strong electromagnetic pulse is solved, and the effect of completely releasing and absorbing the strong electromagnetic pulse is achieved.
Description
Technical Field
The utility model relates to the technical field of an abnormality protection circuit, in particular to a gigabit network electromagnetic protection circuit.
Background
The ethernet technology is a technology for transmitting data and power to a device through a cable of an ethernet, and the gigabit ethernet, as an ethernet technology, has advantages of high efficiency, high speed and high performance, and is widely used in various industries. However, with the increase of electronic devices in recent years and the occurrence of real problems such as long-distance transmission and complex wiring environment of the gigabit ethernet, the gigabit ethernet is easily interfered by strong electromagnetic pulses, and information transmission errors and damage to the ethernet system occur.
The existing ethernet protection circuit generally uses a multi-stage lightning protection circuit for protection, but in the process of implementing the technical scheme of the embodiment of the present utility model, the inventor discovers that at least the following technical problems exist in the above technology:
The strong electromagnetic pulse has the characteristics of strong persistence and high power. The existing lightning protection circuit lacks protection function to strong electromagnetic pulse, can not guarantee complete release and absorption to strong electromagnetic pulse, and is easy to destroy circuit components and even burn products.
Disclosure of utility model
The technical problem that the Ethernet protection circuit cannot completely release and absorb the strong electromagnetic pulse in the prior art is solved by providing the gigabit network electromagnetic protection circuit, and the technical effect of completely releasing and absorbing the strong electromagnetic pulse is achieved.
The embodiment of the application provides an electromagnetic protection circuit of a gigabit network, which is characterized by comprising a discharge unit, a filtering unit, an impedance transformation unit, a decoupling unit and a clamping unit; the bleeder unit comprises a diode D1, wherein the cathode of the diode D1 is coupled with the input end through a coupler C01, and the anode of the diode D1 is grounded; the filtering unit is provided with a first end connected with the input end and a second end used for grounding, and comprises a capacitor C1 and an inductor L1, wherein one ends of the capacitor C1 and the inductor L1 are respectively connected with the first end, and the other ends of the capacitor C1 and the inductor L1 are grounded; the impedance transformation unit comprises a 1/4 lambda line and a transformer T1, wherein the input end is connected with the transformer T1 through the 1/4 lambda line, and the 1/4 lambda line is connected with the decoupling unit through the transformer T1; the decoupling unit comprises a resistor R1, wherein one end of the resistor R1 is connected with the transformer T1, and the other end of the resistor R1 is connected with the output end; the clamping unit comprises a diode VR1, one end of the diode VR1 is connected with the common end of the resistor R1 and the output end, and the other end of the diode VR1 is grounded.
Preferably, the impedance matching unit further comprises a resistor R Z 1, one end of the resistor R Z is connected with the transformer T1, the other end of the resistor R Z is connected with a capacitor C Z 1, and one end of the capacitor C Z, which is far away from the resistor R Z 1, is grounded.
Preferably, the resistor R Z is a matching resistor.
Preferably, the diode VR1 is a transient suppression diode.
Preferably, the inductor L1 is a high-frequency inductor.
Preferably, the coupler C01 is a capacitor.
Preferably, the transformer T1 is a 1:1 isolation transformer.
Preferably, the transformer T1 is a coupled inductive transformer.
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
The embodiment of the application greatly improves the inhibition capability of strong electromagnetic pulse by using the diode and the impedance transformation design, and can ensure that the continuous wave pulse and the long-time modulation pulse are not damaged due to overheating when being injected. And through setting up bleed unit, filter unit, impedance transformation unit, decoupling unit and clamp unit, with the residual voltage control below 2V, with the residual current control below 2A, effectively guaranteed the safety of circuit components and parts.
Drawings
FIG. 1 is a circuit block diagram of an electromagnetic protection circuit for a gigabit network in accordance with an embodiment of the present application;
Fig. 2 is a schematic circuit diagram of an electromagnetic protection circuit of a gigabit network according to an embodiment of the present application;
FIG. 3 is a schematic circuit diagram of a bleed unit of a gigabit network electromagnetic protection circuit provided by an embodiment of the present application;
fig. 4 is a schematic circuit diagram of a filtering unit of the gigabit network electromagnetic protection circuit according to an embodiment of the present application;
Fig. 5 is a schematic circuit diagram of an impedance unit of the gigabit network electromagnetic protection circuit according to an embodiment of the present application;
Fig. 6 is a schematic circuit diagram of a decoupling unit of the gigabit network electromagnetic protection circuit according to an embodiment of the present application;
Fig. 7 is a schematic circuit diagram of a clamping unit of the gigabit network electromagnetic protection circuit according to an embodiment of the present application.
Detailed Description
The technical problem that the Ethernet protection circuit cannot completely release and absorb the strong electromagnetic pulse in the prior art is solved by providing the gigabit network electromagnetic protection circuit, and the technical effect of completely releasing and absorbing the strong electromagnetic pulse is achieved.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.
In the present disclosure, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
As shown in fig. 1 to 7, an embodiment of the present application provides a gigabit network electromagnetic protection circuit, which is characterized by comprising a bleeder unit 100, a filter unit 200, an impedance transformation unit 300, a decoupling unit 400 and a clamping unit 500; the bleeder unit 100 comprises a diode D1, wherein the cathode of the diode D1 is coupled with the input end through a coupler C01, and the anode of the diode D1 is grounded; the filter unit 200 is provided with a first end connected with the input end and a second end used for grounding, and comprises a capacitor C1 and an inductor L1, wherein one ends of the capacitor C1 and the inductor L1 are respectively connected with the first end, and the other ends of the capacitor C1 and the inductor L1 are grounded; the impedance transformation unit 300 comprises a 1/4 lambda line and a transformer T1, wherein the input end of the impedance transformation unit is connected with the transformer T1 through the 1/4 lambda line, and the 1/4 lambda line is connected with the decoupling unit 400 through the transformer T1; the decoupling unit 400 comprises a resistor R1, wherein one end of the resistor R1 is connected with the transformer T1, and the other end of the resistor R1 is connected with the output end; the clamping unit 500 includes a diode VR1, where one end of the diode VR1 is connected to the resistor R1 and the common end of the output end, and the other end is grounded.
In this embodiment, the strong electromagnetic pulse mainly refers to lightning electromagnetic pulse, high-power microwave pulse and nuclear electromagnetic pulse, the discharge unit 100 is used for discharging and reflecting the electromagnetic pulse, when the electromagnetic pulse enters from the input end, the coupler C01 couples the pulse to two ends of the diode D1, the diode D1 discharges and reflects the strong electromagnetic pulse, the pulse level of the output end is reduced, and the discharge effect of the strong electromagnetic pulse is played.
The filter network formed by the capacitor C1 and the inductor L1 in the filter unit 200 is used for filtering energy in the electronic pulse and other pulse frequency domains, so as to reduce conduction interference.
In the impedance transformation unit 300, the 1/4 lambda line and the transformer T1 are used for blocking and isolating the invasion strong electromagnetic pulse, when the pulse invades, the input end of the 1/4 lambda line generates reverse induced electromotive force, so that the voltage of the input end is increased, the trigger diode D1 is started first, and most of the strong electromagnetic pulse energy is discharged. Due to the frequency selection characteristic of the transformer T1, high-frequency pulse interference cannot be completely coupled to the output end through the transformer T1, and pulse energy coupled to the output end is further reduced.
The resistor R1 of the decoupling unit 400 is used to further limit and distribute the remaining pulse energy, so that the pulse energy flowing into the clamping unit 500 is further reduced, and the clamping level of the clamping unit 500 is further reduced.
The diode VR1 in the clamping unit 500 is used for clamping the residual pulse in level and voltage, and limiting the residual voltage and clipping level of the output terminal within a safe range.
The embodiment of the application greatly improves the inhibition capability of strong electromagnetic pulse by using the diode and the impedance transformation design, and can ensure that the continuous wave pulse and the long-time modulation pulse are not damaged due to overheating when being injected. And through setting up bleed unit 100, filter unit 200, impedance transformation unit 300, decoupling unit 400 and clamp unit 500, control the residual voltage below 2V, control the residual current below 2A, effectively guaranteed the safety of circuit components and parts.
As shown in fig. 1 to 7, the impedance matching unit further includes a resistor R Z, one end of the resistor R Z is connected to the transformer T1, the other end of the resistor R Z 1 is connected to a capacitor C Z 1, and one end of the capacitor C Z 1 far from the resistor R Z is grounded.
In this embodiment, the resistor R Z and the capacitor C Z 1 are used to provide port matching for the output interface, so that normal transmission of signals is ensured. The method is suitable for the RS485 interface with the transmission rate of 10Mbps at maximum. The application range is wider.
For example, the resistor R Z is a matching resistor. In this embodiment, the matching resistor functions as impedance matching, reducing high frequency noise and signal overshoot, and absorbing interference pulses.
For example, the diode VR1 is a transient suppression diode. In this embodiment, the transient suppression diode can clamp the level and voltage of the residual pulse more quickly, and limit the residual voltage and clipping level of the output terminal within a safe range.
For example, the inductance L1 is a high-frequency inductance. In this embodiment, the high-frequency inductor plays roles of filtering high-frequency noise, saving electric energy, controlling current and balancing a circuit, and improves anti-interference performance of the circuit by improving an inductance value in the circuit.
For example, coupler C01 is a capacitor. In this embodiment, the use of capacitance can serve as a coupling.
For example, the transformer T1 is a 1:1 isolation transformer. In this embodiment, the 1:1 isolation transformer provides isolation and throttling for the pulses.
For example, the transformer T1 is a coupled inductive transformer. In this embodiment, the coupling inductance transformer refers to a type of coupling of the coupler and the common-mode inductor, and since the strong electromagnetic pulse is usually introduced in the form of the common mode, the coupling inductance transformer has a better effect of controlling the pulse.
It should be noted that the components between the embodiments of the present disclosure may be interchanged as long as the corresponding functions are achieved.
The following points need to be described:
(1) Unless otherwise defined, like reference numerals refer to like meanings in the embodiments of the disclosure and the drawings.
(2) In the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are referred to, and other structures may refer to the general design.
(3) In the drawings for describing embodiments of the present disclosure, components or regions are exaggerated for clarity. It will be understood that when an element is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.
The foregoing is merely specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the disclosure, and it is intended to cover the scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (8)
1. The gigabit network electromagnetic protection circuit is characterized by comprising a discharge unit, a filtering unit, an impedance transformation unit, a decoupling unit and a clamping unit;
The bleeder unit comprises a diode D1, wherein the cathode of the diode D1 is coupled with the input end through a coupler C01, and the anode of the diode D1 is grounded;
The filtering unit comprises a capacitor C1 and an inductor L1, wherein the capacitor C1 is connected with the inductor L1 in parallel and then is respectively connected with the input end and the grounding end;
The impedance transformation unit comprises a 1/4 lambda line and a transformer T1, wherein the input end is connected with the transformer T1 through the 1/4 lambda line, and the 1/4 lambda line is connected with the decoupling unit through the transformer T1;
The decoupling unit comprises a resistor R1, wherein one end of the resistor R1 is connected with the transformer T1, and the other end of the resistor R1 is connected with the output end;
The clamping unit comprises a diode VR1, one end of the diode VR1 is connected with the common end of the resistor R1 and the output end, and the other end of the diode VR1 is grounded.
2. The gigabit network electromagnetic shield circuit of claim 1, further comprising:
The impedance matching unit comprises a resistor R Z 1, one end of the resistor R Z 1 is connected with the transformer T1, the other end of the resistor R Z 1 is connected with a capacitor C Z 1, and one end of the capacitor C Z, which is far away from the resistor R Z 1, is grounded.
3. The gigabit network electromagnetic shield circuit of claim 2 wherein the resistor R Z is a matched resistor.
4. A gigabit network electromagnetic protection circuit according to any of claims 1-3, wherein said diode VR1 is a transient suppression diode.
5. A gigabit network electromagnetic protection circuit according to any of claims 1-3, wherein said inductance L1 is a high frequency inductance.
6. A gigabit network electromagnetic protection circuit according to any of claims 1-3, wherein the coupler C01 is a capacitor.
7. A gigabit network electromagnetic protection circuit according to any of claims 1-3, wherein the transformer T1 is a 1:1 isolation transformer.
8. A gigabit network electromagnetic protection circuit according to any of claims 1-3, wherein the transformer T1 is a coupled inductive transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421056652.2U CN221150960U (en) | 2024-05-15 | 2024-05-15 | Gigabit network electromagnetic protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421056652.2U CN221150960U (en) | 2024-05-15 | 2024-05-15 | Gigabit network electromagnetic protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221150960U true CN221150960U (en) | 2024-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421056652.2U Active CN221150960U (en) | 2024-05-15 | 2024-05-15 | Gigabit network electromagnetic protection circuit |
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| Country | Link |
|---|---|
| CN (1) | CN221150960U (en) |
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- 2024-05-15 CN CN202421056652.2U patent/CN221150960U/en active Active
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