JP2004032585A - Input/output circuit for power distribution line carrier signal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an input/output circuit for power distribution line carrier signals which is easily installable, without needing new wiring works, and is immune to the impedance drop of the power distribution line, if it occurs. <P>SOLUTION: The circuit is composed of a modem 1 for transmitting/receiving carried signals, a capacitor 2 for matching the impedance, an electromagnetic induction coupler 8 for injecting the carried signals to a power distribution line 7 by electromagnetic induction and extracting the carrier signals from the line 7, a looped wiring 9 attached to the coupler 8, and the power distribution line 7. The coupler 8 includes looped wirings 9 closely adjacent along a first and second phase lines of the distribution line 7, and the line 7 and the wiring 9 are electromagnetically induction coupled 1:1 and structured such that for each phase the line 7 and the wiring 9 are combined en bloc for each phase and made to pierce a magnetic body, such as ferrite. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an input / output circuit of a distribution line carrier signal, and particularly when connecting a distribution line carrier device to a low-voltage distribution line, a high-voltage distribution line, a distribution board, a pole transformer, etc., inductively without new wiring work. The present invention relates to an input / output circuit of a distribution line transport signal that can be easily installed by coupling.
[0002]
[Prior art]
When performing data communication and the like, means for using a low-voltage distribution line or a high-voltage distribution line as a power supply line without using a dedicated cable as a transmission line and superimposing a carrier wave on a commercial power supply has been put into practical use. By utilizing the service lines provided in each home or business, an efficient network can be constructed without laying new communication lines.
Conventionally, when injecting or extracting a transmission signal output from a distribution line carrier or a received signal input to a distribution line, the distribution line carrier is directly connected to the distribution line via a coupling capacitor. For example, in the case of a low-voltage distribution line of 100 V, a plug is attached to the end of a coupling capacitor provided in the distribution line carrier, and the plug is inserted into an outlet for connecting a load device. It could be connected to the low voltage distribution line.
[0003]
FIG. 6 is a diagram illustrating a configuration example of a conventional input / output circuit of a distribution line carrier signal. The figure shows a modem 1 for transmitting and receiving a carrier signal, a capacitor 2 for impedance matching, an input / output transformer 3, coupling capacitors 4a and 4b, a plug 5, an outlet 6 provided on a distribution line, a distribution line, 7.
[0004]
The operation of FIG. 6 will be described. In the modem 1, the high-band and low-band carriers are selectively used to divide the band. For example, the transmission signal is transmitted using the high-band carriers, and the reception composed of the low-band carriers is performed. Input the signal. The capacitor 2 for impedance matching is inserted for impedance matching between the distribution line 7 and the modem 1, and functions as power factor adjustment. On the other hand, the input / output transformer 3 is connected to the input / output unit of the modem 1, and when the modem 1 is connected to the distribution line 7, the balance of the distribution line 7 is ensured, and the noise component of the low frequency band is further reduced. The plug 5 is connected via coupling capacitors 4a and 4b that remove and block a DC component. Therefore, the distribution line carrier is connected to the distribution line 7 by inserting the plug 5 into the outlet 6.
[0005]
[Problems to be solved by the invention]
However, the distribution line used by the distribution line carrier as a transmission line includes a low-voltage distribution line and a high-voltage distribution line, and the position where the distribution line carrier is attached to the distribution line is a device such as a distribution board or a pole transformer. In some cases. In such a case, it is difficult to connect with the plug and outlet as described above, and the coupling capacitor provided in the distribution line carrier is directly connected to the high voltage distribution line, distribution board, pole transformer and new wiring work. Was attached with.
[0006]
On the other hand, in the connection of the distribution line carrier to the distribution line using the coupling capacitor, when the impedance of the distribution line is low, the transmission efficiency is degraded due to the voltage coupling, and the communication may be hindered.
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and when a distribution line carrier is mounted on a distribution line, it can be easily installed without requiring new wiring work. It is an object of the present invention to provide an input / output circuit of a distribution line carrier signal which is not affected when the impedance of the power supply decreases.
[0007]
[Means for Solving the Problems]
To achieve the above object, an input / output circuit for a distribution line carrier signal according to the present invention has the following configuration.
An input / output circuit for a distribution line carrier signal according to claim 1 is a carrier signal input / output circuit in a distribution line carrier device that performs communication by superimposing a predetermined carrier wave on a commercial power supply using a distribution line as a transmission path. A capacitor that performs impedance matching between the modem and the distribution line, and an electromagnetic induction coupling unit that injects the carrier signal into the distribution line by electromagnetic induction and extracts a carrier signal from the distribution line, and the electromagnetic induction coupling unit includes: A loop-shaped wiring connected in a loop along each of the first phase and the second phase of the distribution line, and connected to the capacitor; a first-phase line and the loop of the distribution line; And a second magnetic body that passes through the second phase line of the distribution line and the loop wiring at once.
[0008]
According to a second aspect of the present invention, the input / output circuit for a distribution line carrier signal is configured such that the loop-shaped wiring forms a loop after being wound around each of the first magnetic body and the second magnetic body a plurality of times.
[0009]
According to a third aspect of the present invention, the input / output circuit for a distribution line carrier signal is configured such that the magnetic body has a divided structure.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
In this embodiment, an electromagnetic induction coupling circuit is used as a means for connecting the distribution line conveying device to the distribution line, and a loop-shaped wiring is formed along the first and second phase lines of the distribution line. And a distribution line and a loop-shaped wiring are passed through two magnetic bodies. Therefore, by using the electromagnetic induction as the coupling circuit, the distribution line carrier is current-coupled to the distribution line, and the transmission efficiency is prevented from lowering even when the impedance of the distribution line is low.
[0011]
FIG. 1 is a configuration diagram showing a first embodiment of an input / output circuit of a distribution line carrier signal according to the present invention. The figure shows a modem 1 for transmitting and receiving a carrier signal, a capacitor 2 for impedance matching, and an electromagnetic induction coupling unit for injecting the carrier signal into the distribution line 7 by electromagnetic induction and extracting the carrier signal from the distribution line 7. 8, a loop-shaped wiring 9 provided in the electromagnetic induction coupling section 8, and a distribution line 7.
[0012]
Referring to FIG. 1, in a modem 1, a high-band and a low-band carrier are selectively used to perform band division. For example, a transmission signal is transmitted using a high-band carrier, and a reception signal composed of a low-band carrier is transmitted. input. The capacitor 2 for impedance matching is inserted for impedance matching between the distribution line 7 and the modem 1, and functions as power factor adjustment. The electromagnetic induction coupling section 8 includes a loop-shaped wiring 9 disposed close to the first-phase line 7a and the second-phase line 7b of the distribution line 7, and the distribution line 7 and the loop-shaped wiring 9 The electromagnetic induction coupling is performed at a ratio of 1: 1. Further, the distribution line 7 and the loop-shaped wiring 9 have a structure in which the distribution line 7 and the loop-shaped wiring 9 are collectively passed through a magnetic material such as ferrite for each phase.
[0013]
As described above, when the impedance of the distribution line 7 is decreased and the carrier signal current is increased by the conventional capacitor, the transmission efficiency decreases because the loss in the coupling capacitor increases when the current increases, as described above. I do. On the other hand, if the coupling to the distribution line is electromagnetic induction coupling as in this embodiment, the magnetic flux increases in the electromagnetic induction coupling section 8 when the impedance of the distribution line decreases and the carrier signal current increases. A large number of carrier signals can be injected, and an input / output circuit for distribution line carrier signals with high transmission efficiency can be provided.
[0014]
FIG. 2 shows an example of the structure of the first embodiment of the input / output circuit of the distribution line carrier signal according to the present invention. In the figure, the first phase line 7a of the distribution line 7 is passed through the first magnetic body 10a, the second phase line 7b is passed through the second magnetic body 10b, and the first magnetic body 10a, The wiring 9 is made to penetrate the second magnetic body 10b in a loop shape. The loop-shaped wiring 9 is connected to a modem via the connection unit 11. According to the present embodiment, when performing installation work, installation work such as newly drawing out wiring from the distribution line and connecting to the connection portion of the distribution line conveyance device becomes unnecessary, and the distribution line can be installed without modifying existing equipment. The operation of the transport device can be started.
[0015]
When installing the electromagnetic induction coupling section 8, the distribution line 7 is temporarily removed at a connection portion of the distribution line 7 to a distribution device or the like, and the first phase line 7a of the distribution line 7 is connected to the first magnetic body 10a. After penetrating the second phase line 7b through the second magnetic body 10b, the distribution line is reconnected to the connection portion of the distribution equipment. Next, the loop-shaped wiring 9 is made to penetrate the first magnetic body 10a and the second magnetic body 10b so as to form a loop, and is connected to the connection portion 11 to complete the process. Further, according to the present embodiment, due to its structure, the loop-shaped wiring 9 may be penetrated through the magnetic material when the distribution line conveying device is installed, which is compared with a case where coils and transformers are manufactured and installed in a factory in advance. Thus, the cost can be greatly reduced.
[0016]
FIG. 3 is a configuration diagram showing a second embodiment of the input / output circuit of the distribution line carrier signal according to the present invention. This figure shows that the loop-shaped wiring 9 provided in the electromagnetic induction coupling portion 8 does not penetrate the magnetic body only for one turn as in the first embodiment, but the loop-shaped wiring is formed by the first magnetic body and the second magnetic body. A loop is formed after winding around each body a plurality of times. FIG. 3 shows a modem 1 for transmitting and receiving a carrier signal, a capacitor 2 for impedance matching, and an electromagnetic induction for injecting the carrier signal into the distribution line 7 by electromagnetic induction and extracting the carrier signal from the distribution line 7. It is composed of a coupling portion 12, a loop-shaped wiring 13 provided in the electromagnetic induction coupling portion 12, and the distribution line 7.
[0017]
The operation of FIG. 3 is different from the operation of FIG. 1 only in the function of the electromagnetic induction coupling unit 12. Therefore, the function of the electromagnetic induction coupling unit 12 will be described. A loop is formed by winding a plurality of times around the body and the second magnetic body, and the distribution line 7 side is connected to the loop-shaped wiring 13 side at a ratio of N to 1 to improve the coupling degree of electromagnetic induction. Thus, the performance is improved.
[0018]
FIG. 4 shows the structure of a second embodiment of the input / output circuit of the distribution line carrier signal according to the present invention. In the figure, the first magnetic line 10a penetrates the first phase line 7a of the distribution line 7 and the second magnetic line 10b penetrates the second phase line 7b. The loop is formed after the wiring is wound around each of the second magnetic bodies 10b a plurality of times. The loop-shaped wiring 13 is connected to a modem via the connection unit 11. In the present embodiment, similarly to the first embodiment, when performing the installation work, the installation work such as newly drawing out the wiring from the distribution line and connecting to the connecting portion of the distribution line transport device becomes unnecessary, and the existing equipment is not required. The operation of the distribution line carrier can be started without remodeling.
[0019]
When installing the electromagnetic induction coupling section 12, the distribution line 7 is removed at a connection portion of the distribution line 7 to a distribution device or the like, and the first phase line 7a of the distribution line 7 is connected to the first magnetic body 10a. After penetrating the second phase line 7b through the second magnetic body 10b, the distribution line is reconnected to a connection portion or the like of the distribution device. Next, the loop-shaped wiring is formed so as to form a loop after winding the wiring around the first magnetic body 10a and the second magnetic body 10b a plurality of times, respectively, and is connected to the connection portion 11 to complete. Further, according to the present embodiment, due to its structure, the loop-shaped wiring 13 may be penetrated through the magnetic body when the distribution line conveying device is installed, as compared with a case where coils and transformers are manufactured and installed in a factory in advance. Thus, the cost can be greatly reduced.
[0020]
FIG. 5 shows a structural example of a third embodiment of the input / output circuit of the distribution line carrier signal according to the present invention. This embodiment is a modification of the structure in the first embodiment and the second embodiment described above, and is more efficient when the installation work is performed by making the magnetic body a divided type. The work can be done. FIG. 5 shows the structure of the electromagnetic induction coupling portion when applied to the first embodiment. The magnetic body is divided into two as shown by the split magnetic bodies 14a and 14b.
[0021]
Therefore, when installing the present electromagnetic induction coupling portion, the split magnetic members 14a and 14b are coupled so as to sandwich the distribution line 7 and the loop-shaped wiring 9 and fixed using a predetermined occupying bracket or the like. According to this embodiment, when performing the installation work, the distribution line path 7 is removed at the connection portion of the distribution line path 7 to the distribution equipment or the like, and after the two distribution line paths 7 are passed through the two magnetic bodies, respectively. In addition, there is no need to reconnect the distribution line to the connection part of the power distribution equipment, and the installation work is simplified.
[0022]
【The invention's effect】
As described above, the first and second aspects of the present invention use electromagnetic induction as the coupling circuit, so that the distribution line carrier is current-coupled to the distribution line, and even when the impedance of the distribution line is reduced. A coupling circuit with high transmission efficiency can be realized, which is very effective in operating the distribution line carrier. On the other hand, the input / output circuit according to the present embodiment does not require wiring work involving new processing on the distribution line during installation work, and the electromagnetic induction coupling circuit can be easily assembled at the installation site of the distribution line transfer device. It is possible and the connection work can be simplified. According to the third aspect of the present invention, since the magnetic body constituting the coupling circuit is of a split type, it is possible to easily penetrate the distribution line or the loop-shaped wiring through the magnetic body when performing installation work. Is further simplified.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a first embodiment of an input / output circuit of a distribution line carrier signal according to the present invention.
FIG. 2 shows a structural example of a first embodiment of an input / output circuit of a distribution line carrier signal according to the present invention.
FIG. 3 is a configuration diagram showing a second embodiment of the input / output circuit of the distribution line carrier signal according to the present invention.
FIG. 4 shows a structural example of a second embodiment of the input / output circuit of the distribution line carrier signal according to the present invention.
FIG. 5 shows a structural example of a third embodiment of the input / output circuit of the distribution line carrier signal according to the present invention.
FIG. 6 is a diagram illustrating a configuration example of a conventional input / output circuit of a distribution line carrier signal.
[Explanation of symbols]
1. Modem, 2. Capacitor,
3 ··· input / output transformer, 4a, 4b ··· coupling capacitor,
5. Plug, 6. Outlet,
7 ··· distribution line, 7a ··· first phase line,
7b ··· Second-phase line 8 ··· Electromagnetic induction coupling section
9 loop wiring, 10a first magnetic body,
10b ··· Second magnetic body, 11 ··· Connection part,
12 ··· Electromagnetic induction coupling, 13 ··· Loop-shaped wiring,
14a, 14b ··· Split-type magnetic body

Claims (3)

Using a distribution line as a transmission line, a carrier signal input / output circuit in a distribution line carrier device that performs communication by superimposing a predetermined carrier wave on a commercial power supply,
A capacitor for impedance matching between the modem and the distribution line,
Injecting the carrier signal into the distribution line by electromagnetic induction, and comprising an electromagnetic induction coupling unit that extracts the carrier signal from the distribution line,
The electromagnetic induction coupling portion is wired in a loop along respective lines of the first phase and the second phase of the distribution line, and a loop-shaped wiring connected to the capacitor;
A first magnetic body that collectively penetrates the first phase line and the loop wiring of the distribution line path,
An input / output circuit for a distribution line transport signal, comprising: a second magnetic body that collectively penetrates a second phase line of the distribution line and the loop wiring. The input / output circuit of a distribution line carrying signal according to claim 1, wherein the loop-shaped wiring forms a loop after being wound a plurality of times around each of the first magnetic body and the second magnetic body. 3. The input / output circuit of a distribution line carrier signal according to claim 1, wherein the magnetic body has a divided structure.

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