CN208128207U - A kind of attenuator based on G3 frequency band electric line communication system - Google Patents
A kind of attenuator based on G3 frequency band electric line communication system Download PDFInfo
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- CN208128207U CN208128207U CN201820911991.2U CN201820911991U CN208128207U CN 208128207 U CN208128207 U CN 208128207U CN 201820911991 U CN201820911991 U CN 201820911991U CN 208128207 U CN208128207 U CN 208128207U
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Abstract
The utility model relates to electric energy meter technical fields, more particularly to a kind of attenuator based on G3 frequency band electric line communication system, including low-pass filter and matching attenuation network, the matching attenuation network is symmetrical structure, and is additionally provided with protection module in the matching attenuation network.This attenuator reliability is higher.
Description
Technical field
The utility model relates to electric energy meter technical field more particularly to a kind of declining based on G3 frequency band electric line communication system
Subtract device.
Background technique
Attenuator is mainly to provide a kind of equipment for setting pad value, by low-pass filter and matching attenuation combination of network
At, but the matching attenuation network of the prior art does not have protection, so being easy failure when there is electric network noise.
Summary of the invention
Technical problem to be solved in the utility model is：It is higher logical based on G3 frequency band power line to provide a kind of reliability
The attenuator of letter system.
Technical solution used by the utility model is：A kind of attenuator based on G3 frequency band electric line communication system, packet
Low-pass filter and matching attenuation network are included, matching attenuation network is symmetrical structure, and is additionally provided in matching attenuation network anti-
Protect module.
Matching attenuation network includes first capacitor, the second capacitor, third capacitor, the 4th capacitor, first resistor, the second electricity
Resistance, 3rd resistor, the 4th resistance and the 5th resistance, first capacitor, first resistor, second resistance and the second capacitor successively connect
It connects, third capacitor, 3rd resistor, the 4th resistance and the 4th capacitor are sequentially connected, and the 5th resistance one end is connected to the first electricity
Between resistance and second resistance, the 5th resistance other end is connected between 3rd resistor and the 4th resistance.
Matching attenuation network further includes the 6th resistance, the 7th resistance and the 8th resistance, first capacitor, first resistor,
Six resistance, second resistance and the second capacitor are sequentially connected, third capacitor, 3rd resistor, the 7th resistance, the 4th resistance and
Four capacitors are sequentially connected, and the 5th resistance one end is connected between first resistor and the 6th resistance, and the 5th resistance other end is connected to
Between 3rd resistor and the 7th resistance, the 8th resistance one end is connected between the 6th resistance and second resistance, and the 8th resistance is another
End is connected between the 7th resistance and the 4th resistance.
Protection module includes the first discharge tube and the second discharge tube, and first discharge tube one end is connected to first capacitor and first
Between resistance, the first discharge tube other end is connected between third capacitor and 3rd resistor, and second discharge tube one end is connected to
Between two resistance and the second capacitor, the second discharge tube other end is connected between the 4th resistance and the 4th capacitor.
First resistor, second resistance, the resistance value of 3rd resistor and the 4th resistance are 51 ohm, the 6th resistance and the 7th
The resistance value of resistance is 100 ohm, and the resistance value of the 5th resistance and the 8th resistance is 5.1 ohm.
Low-pass filter is 7 rank Butterworth structures.
The T-type symmetrical structure that low-pass filter is LCL is laid out.
Low-pass filter include the first inductance, the second inductance, third inductance, the 4th inductance, the 5th inductance, the 6th inductance,
7th inductance, the 8th inductance, the 5th capacitor, the 6th capacitor and the 7th capacitor, the first inductance, the second inductance, third inductance,
Four inductance are sequentially connected, and the 5th inductance, the 6th inductance, the 7th inductance, the 8th inductance are sequentially connected, one end connection of the 5th capacitor
Between the first inductance and the second inductance, the other end of the 5th capacitor is connected between the 5th inductance and the 6th inductance, the 6th electricity
One end of appearance is connected between the second inductance and third inductance, and the other end of the 6th capacitor is connected to the 6th inductance and the 7th inductance
Between, one end of the 7th capacitor is connected between third inductance and the 4th inductance, and the other end of the 7th capacitor is connected to the 7th electricity
Between sense and the 8th inductance.
Using the above structure compared with prior art, the utility model has the following advantages that：By matching attenuation network settings
At symmetrical structure, two-way communication may be implemented in this way, and two-way effect is identical；Secondly, being arranged in matching attenuation network anti-
Module is protected, can prevent electric network noise from leading to matching attenuation network failure in this way.
And it is provided with two-stage to decay, so that overall effect is more preferable.
Using 7 rank Butterworth structures, and it is the T-type structure layout of LCL, low-pass filter can be prevented to survey in this way
Examination source generates impedance path and influences final testing result.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model attenuator.
Fig. 2 is the circuit diagram of the low-pass filter in the utility model attenuator.
Fig. 3 is the circuit diagram of matching attenuation network in the utility model attenuator.
As shown in the figure：R1, first resistor；R2, second resistance；R3,3rd resistor；R4, the 4th resistance；R5, the 5th resistance；
R6, the 6th resistance；R7, the 7th resistance；R8, the 8th resistance；C1, first capacitor；C2, the second capacitor；C3, third capacitor；C4,
Four capacitors；C5, the 5th capacitor；C6, the 6th capacitor；C7, the 7th capacitor；L1, the first inductance；L2, the second inductance；L3, third electricity
Sense；L4, the 4th inductance；L5, the 5th inductance；L6, the 6th inductance；L7, the 7th inductance；L8, the 8th inductance；VD1, the first electric discharge
Pipe；VD2, the second discharge tube.
Specific embodiment
The utility model is described further below in conjunction with attached drawing and specific embodiment, but the utility model is not only
It is limited to following specific embodiments.
It is low-pass filter and matching attenuation network respectively as shown in Figure 1, the attenuator of the application includes two parts, two
Person is connected to power grid respectively.
Wherein low-pass filter is 7 rank Butterworth structures, it is specific as shown in Fig. 2, include the first inductance, the second inductance,
Third inductance, the 4th inductance, the 5th inductance, the 6th inductance, the 7th inductance, the 8th inductance, the 5th capacitor, the 6th capacitor and
Seven capacitors, the first inductance, the second inductance, third inductance, the 4th inductance are sequentially connected, the 5th inductance, the 6th inductance, the 7th electricity
Sense, the 8th inductance be sequentially connected, one end of the 5th capacitor is connected between the first inductance and the second inductance, the 5th capacitor it is another
End is connected between the 5th inductance and the 6th inductance, and one end of the 6th capacitor is connected between the second inductance and third inductance, the
The other end of six capacitors is connected between the 6th inductance and the 7th inductance, and one end of the 7th capacitor is connected to third inductance and the 4th
Between inductance, the other end of the 7th capacitor is connected between the 7th inductance and the 8th inductance.Wherein the inductance value of all inductance is
The capacitance of 4.7mH, the 5th capacitor, the 6th capacitor and the 7th capacitor are 0.68 μ F, and cut-off characteristics is, when less than 1KHz
When, decaying is less than 0.3dB, and when being in 30KHz to 500KHz, decaying is greater than 100dB.
As shown in figure 3, matching attenuation network its specifically include first capacitor, the second capacitor, third capacitor, the 4th capacitor,
First resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, first
Discharge tube and the second discharge tube, first capacitor, first resistor, the 6th resistance, second resistance and the second capacitor are sequentially connected,
Third capacitor, 3rd resistor, the 7th resistance, the 4th resistance and the 4th capacitor are sequentially connected, and the 5th resistance one end is connected to
Between one resistance and the 6th resistance, the 5th resistance other end is connected between 3rd resistor and the 7th resistance, the 8th resistance one end
It being connected between the 6th resistance and second resistance, the 8th resistance other end is connected between the 7th resistance and the 4th resistance, and first
Discharge tube one end is connected between first capacitor and first resistor, and the first discharge tube other end is connected to third capacitor and third electricity
Between resistance, second discharge tube one end is connected between second resistance and the second capacitor, and the second discharge tube other end is connected to the 4th
Between resistance and the 4th capacitor.Wherein, the capacitance of first capacitor, the second capacitor, third capacitor and the 4th capacitor is 0.47 μ
F, first resistor, second resistance, the resistance value of 3rd resistor and the 4th resistance are 51 ohm, the 6th resistance and the 7th resistance
Resistance value is 100 ohm, and the resistance value of the 5th resistance and the 8th resistance is 5.1 ohm, and whole matching attenuation network can be used as
Signal attenuation path provides fixed 65dB decaying between 30KHz to 500KHz.
Claims (8)
1. a kind of attenuator based on G3 frequency band electric line communication system, including low-pass filter and matching attenuation network,
It is characterized in that：The matching attenuation network is symmetrical structure, and is additionally provided with protection module in the matching attenuation network.
2. a kind of attenuator based on G3 frequency band electric line communication system according to claim 1, it is characterised in that：It is described
Matching attenuation network includes first capacitor, the second capacitor, third capacitor, the 4th capacitor, first resistor, second resistance, third electricity
Resistance, the 4th resistance and the 5th resistance, the first capacitor, first resistor, second resistance and the second capacitor are sequentially connected, institute
It states third capacitor, 3rd resistor, the 4th resistance and the 4th capacitor to be sequentially connected, and described 5th resistance one end is connected to first
Between resistance and second resistance, the 5th resistance other end is connected between 3rd resistor and the 4th resistance.
3. a kind of attenuator based on G3 frequency band electric line communication system according to claim 2, it is characterised in that：It is described
Matching attenuation network further includes the 6th resistance, the 7th resistance and the 8th resistance, the first capacitor, first resistor, the 6th electricity
Resistance, second resistance and the second capacitor are sequentially connected, the third capacitor, 3rd resistor, the 7th resistance, the 4th resistance and the
Four capacitors are sequentially connected, and described 5th resistance one end is connected between first resistor and the 6th resistance, and the 5th resistance is another
End is connected between 3rd resistor and the 7th resistance, and described 8th resistance one end is connected between the 6th resistance and second resistance,
The 8th resistance other end is connected between the 7th resistance and the 4th resistance.
4. a kind of attenuator based on G3 frequency band electric line communication system according to claim 3, it is characterised in that：It is described
Protection module includes the first discharge tube and the second discharge tube, and first discharge tube one end is connected to first capacitor and first resistor
Between, the first discharge tube other end is connected between third capacitor and 3rd resistor, the connection of second discharge tube one end
Between second resistance and the second capacitor, the second discharge tube other end is connected between the 4th resistance and the 4th capacitor.
5. a kind of attenuator based on G3 frequency band electric line communication system according to claim 4, it is characterised in that：It is described
First resistor, second resistance, the resistance value of 3rd resistor and the 4th resistance are 51 ohm, the 6th resistance and the 7th resistance
Resistance value be 100 ohm, the resistance value of the 5th resistance and the 8th resistance is 5.1 ohm.
6. a kind of attenuator based on G3 frequency band electric line communication system according to claim 1, it is characterised in that：It is described
Low-pass filter is 7 rank Butterworth structures.
7. a kind of attenuator based on G3 frequency band electric line communication system according to claim 6, it is characterised in that：It is described
The T-type symmetrical structure that low-pass filter is LCL is laid out.
8. a kind of attenuator based on G3 frequency band electric line communication system according to claim 7, it is characterised in that：It is described
Low-pass filter include the first inductance, the second inductance, third inductance, the 4th inductance, the 5th inductance, the 6th inductance, the 7th inductance,
8th inductance, the 5th capacitor, the 6th capacitor and the 7th capacitor, first inductance, the second inductance, third inductance, the 4th electricity
Sense is sequentially connected, and the 5th inductance, the 6th inductance, the 7th inductance, the 8th inductance are sequentially connected, one end of the 5th capacitor
Be connected between the first inductance and the second inductance, the other end of the 5th capacitor be connected to the 5th inductance and the 6th inductance it
Between, one end of the 6th capacitor is connected between the second inductance and third inductance, and the other end of the 6th capacitor is connected to
Between 6th inductance and the 7th inductance, one end of the 7th capacitor is connected between third inductance and the 4th inductance, and described
The other end of seven capacitors is connected between the 7th inductance and the 8th inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820911991.2U CN208128207U (en) | 2018-06-13 | 2018-06-13 | A kind of attenuator based on G3 frequency band electric line communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820911991.2U CN208128207U (en) | 2018-06-13 | 2018-06-13 | A kind of attenuator based on G3 frequency band electric line communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208128207U true CN208128207U (en) | 2018-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820911991.2U Active CN208128207U (en) | 2018-06-13 | 2018-06-13 | A kind of attenuator based on G3 frequency band electric line communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208128207U (en) |
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2018
- 2018-06-13 CN CN201820911991.2U patent/CN208128207U/en active Active
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