CN205545257U - A send and receive filtering and interconnected circuit for observeing and control power line carrier device of system - Google Patents
A send and receive filtering and interconnected circuit for observeing and control power line carrier device of system Download PDFInfo
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- CN205545257U CN205545257U CN201620314015.XU CN201620314015U CN205545257U CN 205545257 U CN205545257 U CN 205545257U CN 201620314015 U CN201620314015 U CN 201620314015U CN 205545257 U CN205545257 U CN 205545257U
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Abstract
The utility model discloses a send and receive filtering and interconnected circuit for observeing and control power line carrier device of system, it includes sends filter circuit, receipt filter circuit and interconnected circuit, its characterized in that: send filter circuit and include inductance L2, receive after inductance L2 and electric capacity C32 establish ties between output and the interconnected circuit's of DA converter the input, receiving filter circuit and including inductance L4, electric capacity C60 and electric capacity C61, they connect in parallel between next stage amplifier circuit's input and earthing terminal, the problem of prior art's power line carrier device directly to use the interference immunity who exists through the power line transmission signal in the observing and controlling system poor, burnt out device etc. Easily is solved.
Description
Technical field
This utility model belongs to carrier communication, particularly relates to a kind of transmission for the electric carrier apparatus of TT&C system and accepts filter and couple circuit.
Background technology
Low-voltage powerline carrier communication PLC(Power Line Communication) refer to utilize existing low-voltage network as transmission medium, realize data transmission and a kind of technology of information exchange.From the twenties in 20th century since power line carrier communication is released, PLC by ripe and be effectively applied to power system, the numerous areas such as security protection controls, Street lamps control, kilowatt meter reading-out system.It is good that it has channel reliability, and survivability is strong, small investment, it is not necessary to sets up the advantages such as special circuit and is widely used.
The electric carrier apparatus of prior art is mainly by controller, demodulator, analog digital conversion, digital-to-analogue conversion, send filter, accept filter device, signal amplifies and couples the part compositions such as circuit, wherein send and accept filter and mainly use low pass filter, coupling main circuit Capacitance Coupled to be used or transformer coupled mode, when using such carrier equipment to be used in TT&C system, owing to TT&C system signal disturbing is strong, waveform is complicated, when the electric carrier apparatus of prior art is applied directly to TT&C system, there is anti-interference poor, easily it is burned out the problems such as device.
Utility model content
The technical problems to be solved in the utility model: provide a kind of transmission for the electric carrier apparatus of TT&C system accept filter and couple circuit, poor with the anti-interference that the electric carrier apparatus of solution prior art is applied directly in TT&C system be existed by power line transmission signals, easily it is burned out the problems such as device.
Technical solutions of the utility model:
A kind of transmission for the electric carrier apparatus of TT&C system accepts filter and couples circuit, it includes sending filter circuit, wave reception filtering circuit and coupling circuit, described transmission filter circuit includes that inductance L2, inductance L2 and electric capacity C32 series connection is followed by between the outfan of D/A converter and the input coupling circuit；Described wave reception filtering circuit includes inductance L4, electric capacity C60 and electric capacity C61, and they are connected in parallel between input and the earth terminal of next stage amplifying circuit.
Described coupling circuit includes coupling the primary coil series connection of electric capacity C51 and coupling transformer T1, coupling electric capacity C51 and coupling transformer T1 and is followed by carrier power source line.
Described wave reception filtering circuit also includes that diode D2 and D3, described diode D2 and D3 are connected in parallel between input and the earth terminal of next stage amplifying circuit.
Described coupling circuit also includes that transient supression diode TVS3, transient supression diode TVS3 are connected with the parallel connection of primary windings of coupling electric capacity C51 and coupling transformer T1.
The secondary coil outfan of described coupling transformer T1 is parallel with moment suppression diode TVS2.
The beneficial effects of the utility model:
The transmission wave reception filtering circuit of electric carrier apparatus and coupling circuit are redesigned by this utility model, inductance L4, electric capacity C60 and C61 is used to form antiresonant circuit, the carrier signal received is played a part bandpass filtering, inductance L2 and electric capacity C32 constitutes transmission filtering shaping circuit, and the analog carrier signal after changing D/A carries out shaping and Filtering Processing；Coupling transformer T1 and coupling electric capacity C51 constitutes coupling circuit, carrier signal source can not only be isolated by coupling transformer and coupling electric capacity with DC source, the high-frequency carrier signal modulated can also be uploaded to DC power line channel, or download high-frequency carrier signal from DC power line so that signal demodulates；This utility model uses voltage surge impact in moment suppression diode TVS2 absorbing circuit, and circuit is played protective effect；Use diode D2, D3 that voltage clamp is protected, play voltage clamp protective effect；Owing to spike or instantaneous overvoltage all may be produced in the access of electric power built-in unit and disconnection; so it is the most necessary in the overvoltage protection accessing electric lines of force one end; the most easily burn out circuit, use transient supression diode TVS3 to solve this problem in this utility model；It is poor that this utility model solves the anti-interference that the electric carrier apparatus of prior art is applied directly in TT&C system be existed by power line transmission signals, is easily burned out the problems such as device.
Accompanying drawing illustrates:
Fig. 1 is this utility model apparatus structure schematic diagram.
Detailed description of the invention:
A kind of transmission for the electric carrier apparatus of TT&C system accepts filter and couples circuit, it includes sending filter circuit, wave reception filtering circuit and coupling circuit, described transmission filter circuit includes that inductance L2, inductance L2 and electric capacity C32 series connection is followed by between the outfan of D/A converter and the input coupling circuit；Described wave reception filtering circuit includes inductance L4, electric capacity C60 and electric capacity C61, and they are connected in parallel between input and the earth terminal of next stage amplifying circuit.
In Fig. 1 Signal_In be carrier signal after filtering after outfan, signal is sent in A/D converter after amplifying coupling and is converted into digital carrier signal, is also in series with electric capacity C50 at Signal_In end.
It is in series with resistance R23 at the earth terminal GND of wave reception filtering circuit.
At the signal input part of wave reception filtering circuit, the signal output part namely coupling circuit is in series with resistance R22.
In Fig. 1, Signal_out is that the analog carrier signal after changing D/A is received, and is transported to send filter circuit and carries out shaping and Filtering Processing.
Described wave reception filtering circuit also includes that diode D2 and D3, described diode D2 and D3 are connected in parallel between input and the earth terminal of next stage amplifying circuit, mainly play voltage clamp protective effect.
During practice, the coupled modes of signal mainly have two kinds: Capacitance Coupled and transformer coupled.They can cut off direct current and transmission AC signal, and the operating point making front stage is mutually isolated, but when transmitting with transformator, the radio-frequency component of signal can exist some decay, and when using capacitive transmission, the phase place of signal can postpone.During small-signal transmission, conventional electric capacity is as coupling element, and when big signal or strong signal transmission, typical transformer is as coupling element.
Transformer-coupled Main Function is to be to be galvanically isolated and impedance variation, also can pass through high-frequency communication signal.Utilize DC power line as communication channel, by carrier signal being uploaded on DC power line input impedance is relatively low when with the coupling transformer of high frequency magnetic core.Therefore this utility model by Capacitance Coupled and transformer coupled is effectively combined, and the effect of coupling electric capacity is used to, every straight and reduce input impedance, increase coupling efficiency.Selecting suitable coupling transformer and the value of coupling electric capacity, can effectively reduce carrier signal and be coupled on electric lines of force produced decay, when in coupling circuit, reactance is identical with load impedance, the decay of signal in theory minimizes.
Coupling circuit includes coupling the primary coil series connection of electric capacity C51 and coupling transformer T1, coupling electric capacity C51 and coupling transformer T1 and is followed by carrier power source line.Coupling circuit of the present utility model uses coupling electric capacity and the compound mode of coupling transformer, transformer-coupled Main Function is to be to be galvanically isolated and impedance variation, also high-frequency communication signal can be passed through, this utility model is by Capacitance Coupled and transformer coupled is effectively combined, the effect of this utility model coupling electric capacity is used to every straight and reduction input impedance, increase coupling efficiency, can effectively reduce carrier signal and be coupled on electric lines of force produced decay, when in coupling circuit, reactance is identical with load impedance, the decay of signal in theory minimizes.
Described coupling circuit also includes that transient supression diode TVS3, transient supression diode TVS3 are connected with the parallel connection of primary windings of coupling electric capacity C51 and coupling transformer T1, plays the effect of overvoltage protection.
The secondary coil outfan of described coupling transformer T1 is parallel with moment suppression diode TVS2.Moment suppression diode TVS2 is mainly voltage surge impact in absorbing circuit, and circuit is played protective effect.
Claims (5)
1. one kind accepts filter for the transmission of the electric carrier apparatus of TT&C system and couples circuit, it includes sending filter circuit, wave reception filtering circuit and coupling circuit, it is characterized in that: described transmission filter circuit includes that inductance L2, inductance L2 and electric capacity C32 series connection is followed by between the outfan of D/A converter and the input coupling circuit；Described wave reception filtering circuit includes inductance L4, electric capacity C60 and electric capacity C61, and they are connected in parallel between input and the earth terminal of next stage amplifying circuit.
A kind of transmission for the electric carrier apparatus of TT&C system the most according to claim 1 accepts filter and couples circuit, it is characterized in that: described coupling circuit includes coupling the primary coil series connection of electric capacity C51 and coupling transformer T1 transformator T1, coupling electric capacity C51 and coupling transformer T1 and is followed by carrier power source line.
A kind of transmission for the electric carrier apparatus of TT&C system the most according to claim 1 accepts filter and couples circuit, it is characterized in that: described wave reception filtering circuit also includes that diode D2 and D3, described diode D2 and D3 are connected in parallel between input and the earth terminal of next stage amplifying circuit.
A kind of transmission for the electric carrier apparatus of TT&C system the most according to claim 2 accepts filter and couples circuit, it is characterized in that: described coupling circuit also includes that transient supression diode TVS3, transient supression diode TVS3 are connected with the parallel connection of primary windings of coupling electric capacity C51 and coupling transformer T1.
A kind of transmission for the electric carrier apparatus of TT&C system the most according to claim 2 accepts filter and couples circuit, it is characterised in that: the secondary coil outfan of described coupling transformer T1 is parallel with moment suppression diode TVS2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620314015.XU CN205545257U (en) | 2016-04-15 | 2016-04-15 | A send and receive filtering and interconnected circuit for observeing and control power line carrier device of system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620314015.XU CN205545257U (en) | 2016-04-15 | 2016-04-15 | A send and receive filtering and interconnected circuit for observeing and control power line carrier device of system |
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| Publication Number | Publication Date |
|---|---|
| CN205545257U true CN205545257U (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620314015.XU Expired - Fee Related CN205545257U (en) | 2016-04-15 | 2016-04-15 | A send and receive filtering and interconnected circuit for observeing and control power line carrier device of system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105763227A (en) * | 2016-04-15 | 2016-07-13 | 贵州大学 | Transmitting/receiving filter and coupling circuit of electric power carrier device for measurement and control system |
| CN111625045A (en) * | 2020-05-23 | 2020-09-04 | 上海沪工焊接集团股份有限公司 | Temperature compensation circuit applied to high-precision current control of inverter welding machine |
| CN112311421A (en) * | 2020-10-24 | 2021-02-02 | 青岛鼎信通讯股份有限公司 | Medium-voltage communication equipment receiving circuit based on AGC |
-
2016
- 2016-04-15 CN CN201620314015.XU patent/CN205545257U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105763227A (en) * | 2016-04-15 | 2016-07-13 | 贵州大学 | Transmitting/receiving filter and coupling circuit of electric power carrier device for measurement and control system |
| CN111625045A (en) * | 2020-05-23 | 2020-09-04 | 上海沪工焊接集团股份有限公司 | Temperature compensation circuit applied to high-precision current control of inverter welding machine |
| CN112311421A (en) * | 2020-10-24 | 2021-02-02 | 青岛鼎信通讯股份有限公司 | Medium-voltage communication equipment receiving circuit based on AGC |
| CN112311421B (en) * | 2020-10-24 | 2022-02-01 | 青岛鼎信通讯股份有限公司 | Medium-voltage communication equipment receiving circuit based on AGC |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 |