CN206585563U - A kind of three-phase kilowatt-hour meter bandwidth carrier communicator - Google Patents
A kind of three-phase kilowatt-hour meter bandwidth carrier communicator Download PDFInfo
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- CN206585563U CN206585563U CN201720281937.XU CN201720281937U CN206585563U CN 206585563 U CN206585563 U CN 206585563U CN 201720281937 U CN201720281937 U CN 201720281937U CN 206585563 U CN206585563 U CN 206585563U
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Abstract
The utility model discloses a kind of three-phase kilowatt-hour meter bandwidth carrier communicator, including three-phase kilowatt-hour meter and three-phase power line, also include carrier signal termination power, carrier signal process circuit, power carrier processor, power-switching circuit, zero cross detection circuit and power supply circuit, the three-phase power line and the carrier signal termination power, zero cross detection circuit is connected, the carrier signal termination power is connected with the carrier signal process circuit, the carrier signal process circuit is connected with the power carrier processor communication, the zero cross detection circuit is also connected with the power carrier processor, the connection of the power carrier processor and three-phase kilowatt-hour meter, the power supply circuit is connected with power-switching circuit, the power-switching circuit respectively with the zero cross detection circuit, carrier signal process circuit, power carrier processor is connected.The long range that the utility model can be realized carries out group-net communication transmission, and networking mechanism is ageing strong, and the time of networking is fast, and transmission rate is fast.
Description
Technical field
The utility model is related to power-line carrier communication field, more particularly to a kind of communication of three-phase kilowatt-hour meter bandwidth carrier
Device.
Background technology
Electric line carrier communication (Power Line Communication, PLC) is a kind of by electric wire progress data biography
The defeated communication technology, in other words, PLC are the Transfer Mediums by the use of existing power network as signal, make power network in transmission electric power
Data communication can be carried out simultaneously.Power equipment, instrument and family expenses in power network can be effectively monitored and controlled in this mode
Electrical equipment.Meanwhile, power line carrier technology plug and play substantially increases production, work and life efficiency, largely saved
About cable wiring manufacture cost.At present, power line carrier technology increasingly dominates power system (power information acquisition system) and civilian
The communication modes of life (smart home).According to carrier frequency, carriers rate, multi-carrier modulation scheme difference, part in industry
For arrowband and the big camp of power communication of broadband two.
In recent years, with the propulsion that State Grid Corporation of China's intelligent grid is built, power information acquisition system is progressively complete
It is kind.Existing intelligent electric energy meter Automatic meter reading system, 485 wirings, arrowband electricity are mostly taken from electric energy meter, collector to concentrator
Line of force carrier wave or communication.However, power line original intention is to carry out electric energy transmission, rather than data transmission, it is right
For data communication, its channel is undesirable, is a highly unstable transmission channel, it is tight that this is embodied in noise jamming
The shortcomings of weight, big time variation and serious signal attenuation.Broadband power line communication BPLC (BPLC：BroadPower Line
Carrier) there can be problems with actual application：BPLC signals are significantly attenuated, it is short to communicate communication distance, transmission is steady
Qualitative difference, communication quality when heavily disturbed is very poor, or even can not connect.
Utility model content
The purpose of this utility model is to provide a kind of three-phase kilowatt-hour meter bandwidth carrier communicator, according to of the present utility model
Bandwidth carrier communicator can realize long range, rapidly progress group-net communication transmission, and networking mechanism is ageing strong, networking
Time is fast, high with traffic rate, to achieve these goals, and the utility model uses following technique effect：
According to the one side of this hair utility model, there is provided a kind of three-phase kilowatt-hour meter bandwidth carrier communicator, including three
Phase ammeter and three-phase power line, the communicator also include carrier signal termination power, carrier signal process circuit, power carrier
Processor, power-switching circuit, zero cross detection circuit and power supply circuit, the three-phase power line couple electricity with the carrier signal
The input connection of the input, zero cross detection circuit on road, the carrier signal termination power output end and the carrier signal
The input connection of process circuit, the carrier signal process circuit is connected with the power carrier processor communication, the zero passage
The output end of detection circuit is connected with the zero passage detection end of the power carrier processor, the communication control of the power carrier processor
End processed and the communication connection of three-phase kilowatt-hour meter, the input connection of the power supply circuit and power-switching circuit, Power convert electricity
The power output end on road is connected with the zero cross detection circuit, carrier signal process circuit, power carrier processor respectively.
It is preferred that, the power-switching circuit include power input interface, power output interface, power conversion module U4,
Resistance R400, resistance R401, resistance R402, resistance R403, electric capacity C400, electric capacity C401, electric capacity C402, electric capacity C403, electric capacity
C404, electric capacity C405, electric capacity C406, electric capacity C407, inductance L400, voltage-regulator diode DZ400, voltage-regulator diode DZ401, voltage stabilizing
Diode DZ402 and voltage-regulator diode DZ403, one end of the electric capacity C700, voltage-regulator diode DZ400 negative electrode, electric capacity
C401 one end, electric capacity C402 one end, resistance R400 one end, power conversion module U4 input and the power input
Interface is connected, and the other end of resistance R400 one end respectively with resistance R401, power conversion module U4 Enable Pin are connected,
The voltage output end of the power conversion module U4 is connected with one end of the electric capacity C403, electric capacity C403 other end difference
Negative electrode, inductance L400 one end, power conversion module U4 switch control terminal with voltage-regulator diode DZ401 are connected, the electricity
Source conversion module U4 feedback control end respectively with one end, resistance R403 one end, electric capacity C404 of the resistance R402 one
End connection, the power output interface respectively with the other end, the resistance R403 other end, electric capacity C404 of the inductance L400
The other end, electric capacity C405 one end, electric capacity C406 one end, electric capacity C407 one end, voltage-regulator diode DZ402 anode connect
Connect, the negative electrode of the voltage-regulator diode DZ402 is connected with the negative electrode of the voltage-regulator diode DZ403, the resistance R402's is another
One end, the electric capacity C405 other end, the electric capacity C406 other end, the electric capacity C407 other end, voltage-regulator diode DZ403 anode
It is connected to ground respectively, the power input interface is connected with the power supply circuit, power output interface is examined with the zero passage respectively
Slowdown monitoring circuit, carrier signal process circuit, the connection of power carrier processor.
It is preferred that, the carrier signal termination power includes electric capacity C1, electric capacity C2, electric capacity C3 and coupling transformer T1, institute
Stating zero cross detection circuit includes photoelectrical coupler U5, resistance R50, resistance R51, resistance R52, electric capacity C50 and electric capacity C51, described
Electric capacity C1 one end, electric capacity C2 one end, electric capacity C3 one end is connected with three-phase power line respectively, electric capacity the C1 other end, electricity
Hold the 5th pin of the C2 other end, the electric capacity C3 other end all with the coupling transformer T1 to be connected, the photoelectrical coupler U5
Negative electrode be connected by resistance R50 with three-phase power line, the anode of the photoelectrical coupler U5 and the coupling transformer T1's
6th pin is connected, and the colelctor electrode of the photoelectrical coupler U5 is connected with resistance R51 one end, resistance R52 one end, the resistance
One end, the inductance L50 one end of the R51 other end respectively with electric capacity C51 are connected, the inductance L50 other end and the power supply electricity
Road is connected, one end, the zero passage detection end of power carrier processor of the other end of the resistance R52 respectively with the electric capacity C50
Connection, emitter stage, the electric capacity C50 other end, the electric capacity C51 other end of the photoelectrical coupler U5 are all connected to ground；It is described
Carrier signal process circuit includes carrier signal receiving circuit and carrier signal transtation mission circuit, the carrier signal receiving circuit
Receive input to be connected with the reception output end of the coupling transformer T1, the transmission output end of the carrier signal receiving circuit
It is connected with the reception input of power carrier processor, at the transmission input and power carrier of the carrier signal transtation mission circuit
Manage the transmission output end connection of device, the transmission output end of the carrier signal transtation mission circuit and the transmission of the coupling transformer T1
Input is connected, the power end of the carrier signal receiving circuit and the power end of carrier signal transtation mission circuit also respectively with power supply
The power output interface connection of change-over circuit.
It is preferred that, the carrier signal receiving circuit includes resistance R3, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electricity
Hold C6, electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C10, inductance L1, inductance L2, inductance L3, inductance L4, diode D1, diode
D2, diode D3, diode D4, diode D5, diode D6, diode D7 and diode D8, the coupling transformer T1's
Negative pole receives one end, the electric capacity C2 one end of output end respectively with resistance R3 and is connected, and the positive pole of the coupling transformer T1 is received
The output end other end respectively with resistance R3, electric capacity C3 one end are connected, the other end of the electric capacity C2 respectively with diode D1
Negative electrode, diode D2 anode, electric capacity C4 one end, inductance L1 one end, inductance L2 one end connection, the electric capacity C3's
Negative electrode, diode D4 anode, the electric capacity C4 other end, the inductance L1 other end, the inductance of the other end respectively with diode D3
L3 one end connection, the inductance L2 other end passes through one end of electric capacity C5 and inductance L4 one end, electric capacity C7 one end, electric capacity C8
Connection, the inductance L3 other end passes through one end company of electric capacity C6 and inductance the L4 other end, the electric capacity C7 other end, electric capacity C9
Connect, electric capacity C8 other end one end respectively with C10, diode D5 anode, diode D6 anode, power carrier processor
Positive pole receive input connection, the other end, diode D7 anode, the diode D8 of the electric capacity C9 other end respectively with C10
Anode, the negative pole of power carrier processor receive input connection, the negative electrode of the diode D5 and diode D6 negative electrode
Connection, the negative electrode of the diode D7 is connected with diode D8 negative electrode, and the anode of the diode D1 is connected to ground, and described two
The power output interface of pole pipe D2 negative electrode, diode D4 negative electrode and power-switching circuit is connected.
It is preferred that, the power carrier processor is communicated to connect by serial bus and the single-phase meter.
It is preferred that, the communicator also includes memory, and the memory is connected with the power carrier processor, should
The chip model of memory is GD25Q16BSIG.
It is preferred that, the chip model of the power carrier processor is HM7901.
It is preferred that, the chip model of the carrier signal transtation mission circuit is THS6214.
The utility model employs above-mentioned technical proposal, and the utility model has following technique effect：
Signal in power network is changed into a high performance data transmission network by the utility model, then by three-phase meter
High-speed data by bandwidth carrier chip be modulated into 2MHz~20MHz frequencies broadband carrier signal carry out power amplification, so
2MHz~20MHz broadband carrier signal is coupled on power line by carrier signal termination power afterwards, it is achieved thereby that three
The energy data of phase table is uploaded and the reading to power line data, the progress group-net communication transmission, networking over long distances of realization
Mechanism is ageing strong, and the time of networking is fast, with traffic rate is high, communication performance is good, loss is low, circuit structure is simple, implement
The low advantage of cost, the remote and high rate data transmission of the power wire broadband carrier realized.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of three-phase kilowatt-hour meter bandwidth carrier communicator of the utility model；
Fig. 2 is the fundamental diagram of the utility model power-switching circuit；
Fig. 3 is the utility model carrier signal termination power, zero cross detection circuit, the connection with carrier signal receiving circuit
Graph of a relation；
Fig. 4 is the cut-away view of the utility model power carrier processor；
Fig. 5 is the encapsulation figure of the utility model power carrier processor；
Fig. 6 is the fundamental diagram of the utility model carrier signal transtation mission circuit；
In accompanying drawing, 1- carrier signal termination powers, 2- carrier signal process circuits, 3- power carrier processors, 4- sources turn
Change circuit, 5- zero cross detection circuits, 6- three-phase kilowatt-hour meters, 7- power supply circuits, 8- memories, 20- carrier signal receiving circuits, 21-
Carrier signal transtation mission circuit.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, referring to the drawings and enumerate excellent
Embodiment is selected, the utility model is further described.However, it is necessary to many details listed in explanation, specification
It is specific even without these just for the sake of making reader have a thorough explanation to one or more aspects of the present utility model
Details can also realize it is of the present utility model these aspect.
As shown in figure 1, according to a kind of three-phase kilowatt-hour meter bandwidth carrier communicator of the present utility model, including three-phase power line
With three-phase kilowatt-hour meter 6, the communicator also includes carrier signal termination power 1, carrier signal process circuit 2, power carrier processing
Device 3, power-switching circuit 4, zero cross detection circuit 5 and power supply circuit 7, the three-phase power line couple electricity with the carrier signal
The input connection of the input, zero cross detection circuit 5 on road 1, output end and the carrier wave of the carrier signal termination power 1
The input connection of signal processing circuit 2, the carrier signal process circuit 2 is communicated to connect with the power carrier processor 3, institute
The output end for stating zero cross detection circuit 5 is connected with the zero passage detection end of the power carrier processor 3, the power carrier processor
3 Control on Communication end is connected with the communication ends of three-phase kilowatt-hour meter 6, and the output end of the power supply circuit 7 is defeated with power-switching circuit 4
Enter end connection, the power output end of the power-switching circuit 4 respectively with the zero cross detection circuit 5, carrier signal process circuit
2nd, power carrier processor 3 is connected；The communicator also includes memory 8, and the memory 8 is handled with the power carrier
Device 3 is connected, and the chip model of the memory is GD25Q16BSIG.The power carrier processor 3 by serial bus with it is described
Three-phase kilowatt-hour meter 6 is communicated to connect, and the chip model of the power carrier processor 3 is HM7901.
In the utility model, as shown in Fig. 2 the power-switching circuit 4 includes power input interface J4_in, power supply
Output interface J4_out, power conversion module U4, resistance R400, resistance R401, resistance R402, resistance R403, electric capacity C400, electricity
Hold C401, electric capacity C402, electric capacity C403, electric capacity C404, electric capacity C405, electric capacity C406, electric capacity C407, inductance L400, voltage stabilizing two
Pole pipe DZ400, voltage-regulator diode DZ401, voltage-regulator diode DZ402 and voltage-regulator diode DZ403, the one of the electric capacity C700
End, voltage-regulator diode DZ400 negative electrode, electric capacity C401 one end, electric capacity C402 one end, resistance R400 one end, power supply become
Mold changing block U4 input is connected with the power input interface, the other end of the resistance R400 respectively with resistance R401 one
End, power conversion module U4 Enable Pin connection, the voltage output end of the power conversion module U4 is with the electric capacity C403's
One end is connected, and negative electrode, inductance L400 one end, the power supply of the electric capacity C403 other end respectively with voltage-regulator diode DZ401 become
Change the mold block U4 switch control terminal connection, the feedback control end of the power conversion module U4 respectively with the resistance R402 one
End, resistance R403 one end, electric capacity C404 one end connection, the power output interface are another with the inductance L400 respectively
End, the resistance R403 other end, the electric capacity C404 other end, electric capacity C405 one end, electric capacity C406 one end, electric capacity C407
One end, voltage-regulator diode DZ402 anode connection, the negative electrode of the voltage-regulator diode DZ402 and the voltage-regulator diode DZ403
Negative electrode connection, the other end of the resistance R402, the electric capacity C405 other end, the electric capacity C406 other end, electric capacity C407
The other end, voltage-regulator diode DZ403 anode are connected to ground respectively, the power input interface is connected with the power supply circuit,
Power output interface is connected with the zero cross detection circuit, carrier signal process circuit, power carrier processor respectively, in this reality
In new, the voltage that the power supply circuit 7 is exported enters line translation by power-switching circuit 4, the need for communicator
Input voltage is transformed into different output voltages using multiple power supplies change-over circuit, the output size of power supply circuit 7 is different
Output ± 12V supply voltages, ± 5V supply voltages, 3.3V power supplys are electric respectively by the different power-switching circuit 4 of multichannel for voltage
Pressure, ± 2.5V supply voltages, ± 1.8V supply voltages and ± 1.2V supply voltages.
In the utility model, as figure withs reference to Fig. 1 and Fig. 3 shown in, the carrier signal termination power 1 including electric capacity C1,
Electric capacity C2, electric capacity C3 and coupling transformer T1, electric 5 tunnels of the zero passage detection include photoelectrical coupler U5, resistance R50, resistance
R51, resistance R52, electric capacity C50 and electric capacity C51, the electric capacity C1 one end, electric capacity C2 one end, electric capacity C3 one end respectively with
Three-phase power line is connected, the electric capacity C1 other end, the electric capacity C2 other end, electric capacity C3 the other end all with the coupling transformer
T1 the 5th pin connection, the negative electrode of the photoelectrical coupler U5 is connected by resistance R50 with three-phase power line, the photoelectric coupling
Device U5 anode is connected with the 6th pin of the coupling transformer T1, and the colelctor electrode of the photoelectrical coupler U5 is with resistance R51's
One end, resistance R52 one end connection, one end, the inductance L50 one end of the other end of the resistance R51 respectively with electric capacity C51 connect
Connect, the inductance L50 other end is connected with the power supply circuit 7, the other end of the resistance R52 is respectively with the electric capacity C50's
One end, the zero passage detection end connection of power carrier processor 3, the emitter stage of the photoelectrical coupler U5, electric capacity C50 it is another
End, the electric capacity C51 other end are all connected to ground, and photoelectrical coupler U5 plays Phototube Coupling, for isolating forceful electric power and light current
Isolation.In the utility model, the carrier signal termination power 1 is coupled by A phase carrier waves termination power 10, B phases carrier wave respectively
Circuit 11 and C phase carrier waves termination power 12 are constituted, the signals of A phase power lines by electric capacity C1 (A phase carrier waves termination power 10) with
Coupling transformer T1 primary input terminals (the 6th pin) connection is stated, the signal of B phase power lines is by electric capacity C2 (B phases carrier wave coupling electricity
Road 11) it is connected with stating coupling transformer T1 primary input terminals (the 6th pin), the signal of C phase carrier wave power lines passes through electric capacity C3 (C phases
Carrier wave termination power 12) it is connected with stating coupling transformer T1 primary input terminals (the 6th pin), zero cross detection circuit 5 detects any one
The zero-point voltage (zero-point voltage on the utility model detection C phase power lines) of phase power line；In the present embodiment, at power carrier
Manage device 3 produce two kinds of different frequencies carrier signal, transmitting-receiving two carrier signals when have the time difference (time difference τ≤10 it is micro-
Second), error probability is easily caused in the inner transmitting-receiving for carrying out data of zero crossing moment surrounding time (t≤4 millisecond), therefore, passes through zero
Detection circuit 5, which is detected, gets the pulse signal at 220V industrial-frequency alternating current zero crossing moment, and detected pulse signal is defeated
Enter to the zero passage detection end ZC_DTCT of power carrier processor 3 and directly detected, so as to be carried out for power carrier processor 3
Zero passage communication check and phase judgment provide foundation, and entering to transmit and receive data in zero-acrross ing moment can effectively eliminate dry on power line
Disturb, the data for receiving and dispatching power carrier processor 3 are more accurate.
In the utility model, as schemed with reference to shown in Fig. 1, Fig. 3 and Fig. 4, the carrier signal process circuit 2 includes carrier wave
Signal receiving circuit 20 and carrier signal transtation mission circuit 21, reception input and the coupling of the carrier signal receiving circuit 20
Close transformer T1 reception output end connection, transmission output end and the power carrier processor of the carrier signal receiving circuit 20
3 reception input connection, the transmission of the transmission input and power carrier processor 3 of the carrier signal transtation mission circuit 21 is defeated
Go out end connection, the transmission output end of the carrier signal transtation mission circuit 21 and the transmission input of the coupling transformer T1 connect
Connect, the power end of the carrier signal receiving circuit 20 and the power end of carrier signal transtation mission circuit 21 also respectively with Power convert
The power output interface J4_out connections of circuit 4.With reference to shown in Fig. 1, Fig. 3, the carrier signal receiving circuit 20 includes resistance
R3, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C10, inductance L1, electricity
Feel L2, inductance L3, inductance L4, diode D1, diode D2, diode D3, diode D4, diode D5, diode D6, two poles
Pipe D7 and diode D8, the coupling transformer T1 negative pole receive output end RX- (coupling transformer T1 the 4th pin) points
One end, electric capacity C2 one end not with resistance R3 are connected, and the positive pole of the coupling transformer T1 receives output end RX+ (coupling changes
Depressor T1 the first pin) other end respectively with resistance R3, electric capacity C3 one end be connected, the other end difference of the electric capacity C2
Negative electrode, diode D2 anode with diode D1, electric capacity C4 one end, inductance L1 one end, inductance L2 one end are connected, institute
State electric capacity C3 other end negative electrode respectively with diode D3, diode D4 anodes, the electric capacity C4 other end, inductance L1 it is another
End, inductance L3 one end connection, the inductance L2 other end pass through electric capacity C5 and inductance L4 one end, electric capacity C7 one end, electric capacity
C8 one end connection, the inductance L3 other end passes through electric capacity C6 and inductance the L4 other end, the electric capacity C7 other end, electric capacity C9
One end is connected, electric capacity C8 other end one end respectively with C10, diode D5 anodes, diode D6 anodes, power carrier processing
The positive pole of device 3 receives input connection, the other end, diode D7 anode, the diode of the electric capacity C9 other end respectively with C10
D8 anode, the negative pole of power carrier processor 3 receive input connection, the negative electrode of the diode D5 and diode D6 the moon
Pole is connected, and the negative electrode of the diode D7 is connected with diode D8 negative electrode, and the anode of the diode D1 is connected to ground, described
Power output interface J4_out4 (diode D2 the moon of diode D2 negative electrode, diode D4 negative electrode and power-switching circuit
Pole and diode D4 negative electrode use+3.3V supply voltages) connection.In the utility model, the model of power carrier processor 3
Using the HM7901 chips of the magnificent Xun Lian Science and Technology Ltd.s design production in Beijing, as shown in Figure 4 and Figure 5, in the CPU of the chip
Embedding ARM926ej-s core processors, maximum operating frequency is 266MHz, embeds I-Cache 8KB, D-Cache 8KB, ITCM
4KB；Peripheral interface includes 1 MII interface and supports the extension of 10/100Mbits/s networks, 1 SPI Master/Slave to connect
Mouth, 4 UART interfaces, 32 GPIO interfaces, 1 I2C interface, storage inside interface includes built-in SDRAM memory, maximum branch
16MB is held, SPI external memorizers are also supported.The HM7901 chips use OFDM modulation techniques, reference frequency output be 2MHz~
20MHz, its subcarrier supports BPSK, QPSK, 8QAM, 16QAM, 64QAM modulation, subcarrier Adaptive Modulation；With powerful
Denoising and error correcting capability.
In the utility model, the negative pole of the coupling transformer T1, which receives output end RX-, to be used to receive the high frequency difference of negative pole
Sub-carrier signal, coupling transformer T1 positive pole, which receives output end RX+, to be used to receive positive extremely high frequency difference carrier signal, the coupling
Close one end, the electric capacity C2 one end of transformer T1 negative pole reception output end RX- respectively with resistance R3 to be connected, coupling transformer T1
Positive pole receive the output end RX+ other end respectively with resistance R3, electric capacity C3 one end and be connected, coupling transformer T1 is so as to form
High frequency differential received output end, the High-frequency differential signals for coupling output are exported to carrier signal receiving circuit 20, carrier signal
Receiving circuit 20 is made up of four parts, and low pass filter is constituted by resistance R3, electric capacity C2, electric capacity C3, by inductance L1, electric capacity C4,
Inductance L2, inductance L3 constitute single order high-pass filter, by electric capacity C5, electric capacity C6, inductance L4, electric capacity C7, electric capacity C8, electric capacity C9,
Electric capacity C10 constitutes bivalent high-pass filter, and signal suppression is constituted by diode D5, diode D6, diode D7 and diode D8
Circuit processed.Therefore, load is constituted by low pass filter, single order high-pass filter, bivalent high-pass filter and signal suppression circuit
Ripple signal receiving circuit, is demodulated to the power carrier process chip HM7901 broadband carrier signals for exporting 2MHz~20MHz
And modulation, the noise jamming on power line is filtered out, carrier signal receptivity is improved；Wherein, diode D1, diode
D2, diode D3 and diode D4 afterflow protection diodes, provide stable current signal for filter signal and while prevent
Signal is excessive, and the diode D5, diode D6, diode D7 and diode D8 are that clamp diode can suppress differential signal
The output end PLC_RX_N of electric capacity C8 in common-mode noise, carrier signal receiving circuit 20 sends the power carrier signal of reception
Negative pole to power carrier process chip HM7901 receives input PLC_IN (the 27th pin), electric capacity C9 output end
The positive pole that the power carrier signal of reception is sent to power carrier process chip HM7901 is received input PLC_ by PLC_RX_P
IP (the 26th pin), two-way High-frequency differential signals input to power carrier process chip HM7901 the 26th pin and
27th pin (not shown), which is demodulated and modulated, obtains the data-signal that power line is sent, then by the electricity after modulation
Force data signal again by power carrier process chip HM7901 positive pole send output end PLC_OP (the 21st pin) and
Negative pole sends output end PLC_OM (the 22nd pin) and is respectively sent to carrier signal transtation mission circuit 21, the carrier signal hair
The chip model that power transmission road 21 is used is THS6214, as shown in fig. 6, i.e. by the electric capacity C11's in ripple signal sending circuit 21
The negative pole that input PLC_TX- and electric capacity C12 input PLC_TX+ is respectively fed to carrier signal transmission chip THS6214 is defeated
Enter to hold D1IN+ (the first pin) and electrode input end D2IN+ (second pin) to carry out differential amplification, to increase the transmission work(of carrier wave
Rate, the positive carrier of carrier signal transtation mission circuit chip THS6214 differential amplifications output sends signal and exported from the 20th pin, so
Afterwards input TX+ is sent by resistance R16, electric capacity C19 coupled outputs the PLC_TX_OP positive pole sent to coupling transformer T1
(coupling transformer T1 second pin), the negative carrier of carrier signal transtation mission circuit chip THS6214 differential amplifications output is sent
Signal is sent to coupling transformer T1 from the output of the 17th pin by resistance R17, electric capacity C20 coupled outputs PLC_TX_ON
Negative pole send input TX- (coupling transformer T1 the 3rd pin), by power carrier after being coupled through over-coupled transformer T1
It is transmitted in signal output to three-phase power line.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as protection domain of the present utility model.
Claims (8)
1. a kind of three-phase kilowatt-hour meter bandwidth carrier communicator, including three-phase kilowatt-hour meter and three-phase power line, it is characterised in that：The communication
Device also includes carrier signal termination power, carrier signal process circuit, power carrier processor, power-switching circuit, zero passage
Detect circuit and power supply circuit, input, the zero cross detection circuit of the three-phase power line and the carrier signal termination power
Input connection, the output end of the carrier signal termination power is connected with the input of the carrier signal process circuit,
The carrier signal process circuit is connected with the power carrier processor communication, the output end of the zero cross detection circuit with it is described
The zero passage detection end connection of power carrier processor, the Control on Communication end of the power carrier processor and the communication ends of three-phase kilowatt-hour meter
Connection, the output end of the power supply circuit and the input of power-switching circuit are connected, the power supply output of the power-switching circuit
End is connected with the zero cross detection circuit, carrier signal process circuit, power carrier processor respectively.
2. a kind of three-phase kilowatt-hour meter bandwidth carrier communicator according to claim 1, it is characterised in that：The Power convert
Circuit include power input interface, power output interface, power conversion module U4, resistance R400, resistance R401, resistance R402,
Resistance R403, electric capacity C400, electric capacity C401, electric capacity C402, electric capacity C403, electric capacity C404, electric capacity C405, electric capacity C406, electric capacity
C407, inductance L400, voltage-regulator diode DZ400, voltage-regulator diode DZ401, voltage-regulator diode DZ402 and voltage-regulator diode
DZ403, electric capacity C700 one end, voltage-regulator diode DZ400 negative electrode, electric capacity C401 one end, electric capacity C402 one end,
Resistance R400 one end, power conversion module U4 input are connected with the power input interface, and the resistance R400's is another
One end one end respectively with resistance R401, power conversion module U4 Enable Pin are connected, the voltage of the power conversion module U4
Output end is connected with one end of the electric capacity C403, electric capacity C403 other end negative electrode respectively with voltage-regulator diode DZ401,
Inductance L400 one end, power conversion module U4 switch control terminal connection, the feedback control end of the power conversion module U4
One end with one end, resistance R403 one end, electric capacity C404 of the resistance R402 is connected respectively, the power output interface point
Not with the other end of the inductance L400, the resistance R403 other end, the electric capacity C404 other end, electric capacity C405 one end, electricity
Hold the anode connection of C406 one end, electric capacity C407 one end, voltage-regulator diode DZ402, the moon of the voltage-regulator diode DZ402
Pole is connected with the negative electrode of the voltage-regulator diode DZ403, the other end, the electric capacity C405 other end, the electric capacity of the resistance R402
The C406 other end, the electric capacity C407 other end, voltage-regulator diode DZ403 anode is connected to ground respectively, the power input
Interface is connected with the power supply circuit, power output interface respectively with the zero cross detection circuit, carrier signal process circuit, electricity
Power carrier processor is connected.
3. a kind of three-phase kilowatt-hour meter bandwidth carrier communicator according to claim 2, it is characterised in that：The carrier signal
Termination power includes electric capacity C1, electric capacity C2, electric capacity C3 and coupling transformer T1, and the zero cross detection circuit includes photoelectrical coupler
U5, resistance R50, resistance R51, resistance R52, electric capacity C50 and electric capacity C51, one end of the electric capacity C1, electric capacity C2 one end, electricity
The one end for holding C3 is connected with three-phase power line respectively, the electric capacity C1 other end, the electric capacity C2 other end, electric capacity C3 the other end all
It is connected with the 5th pin of the coupling transformer T1, the negative electrode of the photoelectrical coupler U5 passes through resistance R50 and three-phase power line
Connection, the anode of the photoelectrical coupler U5 is connected with the 6th pin of the coupling transformer T1, the photoelectrical coupler U5's
Colelctor electrode is connected with resistance R51 one end, resistance R52 one end, the other end of the resistance R51 respectively with electric capacity C51 one
End, inductance L50 one end connection, the inductance L50 other end are connected with the power supply circuit, the other end point of the resistance R52
The zero passage detection end of one end, power carrier processor not with the electric capacity C50 is connected, the transmitting of the photoelectrical coupler U5
Pole, the electric capacity C50 other end, the electric capacity C51 other end are all connected to ground, and the carrier signal process circuit includes carrier signal
Receiving circuit and carrier signal transtation mission circuit, the reception input of the carrier signal receiving circuit and the coupling transformer T1
The connection of reception output end, the transmissions output end of the carrier signal receiving circuit and the reception input of power carrier processor
Connection, the transmission input of the carrier signal transtation mission circuit is connected with the transmission output end of power carrier processor, described to carry
The transmission output end of ripple signal sending circuit is connected with the transmission input of the coupling transformer T1, and the carrier signal is received
The power end of circuit and the power end of carrier signal transtation mission circuit are also connected with the power output interface of power-switching circuit respectively.
4. a kind of three-phase kilowatt-hour meter bandwidth carrier communicator according to claim 3, it is characterised in that：The carrier signal
Receiving circuit includes resistance R3, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, electric capacity C9, electricity
Hold C10, inductance L1, inductance L2, inductance L3, inductance L4, diode D1, diode D2, diode D3, diode D4, diode
D5, diode D6, diode D7 and diode D8, the coupling transformer T1 negative pole receive output end respectively with resistance R3's
One end, electric capacity C2 one end connection, the positive pole of the coupling transformer T1 receive the other end, the electricity of output end respectively with resistance R3
Hold C3 one end connection, the other end of electric capacity C2 negative electrode respectively with diode D1, diode D2 anode, electric capacity C4
One end, inductance L1 one end, inductance L2 one end connection, the other end of electric capacity C3 negative electrode respectively with diode D3, two
Pole pipe D4 anode, the electric capacity C4 other end, the inductance L1 other end, inductance L3 one end connection, the inductance L2 other end lead to
One end that electric capacity C5 is crossed with inductance L4 one end, electric capacity C7 one end, electric capacity C8 is connected, and the inductance L3 other end passes through electric capacity C6
The other end, the electric capacity C7 other end with inductance L4, electric capacity C9 one end are connected, the electric capacity C8 other end respectively with C10 one
End, the positive pole of diode D5 anode, diode D6 anode, power carrier processor receive input connection, electric capacity C9's
The other end, diode D7 anode, diode D8 anode, the negative pole of power carrier processor of the other end respectively with C10 connect
Input connection is received, the negative electrode of the diode D5 is connected with diode D6 negative electrode, the negative electrode of the diode D7 and two poles
Pipe D8 negative electrode connection, the anode of the diode D1 is connected to ground, the negative electrode of the diode D2, diode D4 negative electrode with
The power output interface connection of power-switching circuit.
5. a kind of three-phase kilowatt-hour meter bandwidth carrier communicator according to claim 1, it is characterised in that：The power carrier
Processor is communicated to connect by serial bus and single-phase meter.
6. a kind of three-phase kilowatt-hour meter bandwidth carrier communicator according to claim 1, it is characterised in that：The communicator
Also include memory, the memory is connected with the power carrier processor, and the chip model of the memory is
GD25Q16BSIG。
7. a kind of three-phase kilowatt-hour meter bandwidth carrier communicator according to any one of claim 1~6, it is characterised in that：Institute
The chip model for stating power carrier processor is HM7901.
8. a kind of three-phase kilowatt-hour meter bandwidth carrier communicator according to claim 3, it is characterised in that：The carrier signal
The chip model of transtation mission circuit is THS6214.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720281937.XU CN206585563U (en) | 2017-03-21 | 2017-03-21 | A kind of three-phase kilowatt-hour meter bandwidth carrier communicator |
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|---|---|---|---|
| CN201720281937.XU CN206585563U (en) | 2017-03-21 | 2017-03-21 | A kind of three-phase kilowatt-hour meter bandwidth carrier communicator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110531146A (en) * | 2019-09-02 | 2019-12-03 | 北京智芯微电子科技有限公司 | Zero crossing detection device, method and the computer storage medium of Three Phase Carrier Based communication module |
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2017
- 2017-03-21 CN CN201720281937.XU patent/CN206585563U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110531146A (en) * | 2019-09-02 | 2019-12-03 | 北京智芯微电子科技有限公司 | Zero crossing detection device, method and the computer storage medium of Three Phase Carrier Based communication module |
| CN110531146B (en) * | 2019-09-02 | 2020-11-03 | 北京智芯微电子科技有限公司 | Zero-crossing detection device and method for three-phase carrier communication module and computer storage medium |
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