JP2006033113A - Power line communication adapter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power line communication adapter configuring a highly versatile high speed home network quickly and inexpensively. <P>SOLUTION: A choke coil 1 and a capacitor 2 are connected between conductor lines 11 and 12 having a first I/O port 21 at one end and a second I/O port 22 at the other end. The conductor lines 11 and 12 on the first I/O port 21 side are branched, respectively, and a capacitor 3 is arranged on the branch line 13 having a third I/O port 23 at the distal end. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technology for realizing a high-speed home network by being applied to an indoor power line and further to an outdoor low-voltage lead-in line, and in particular, a power line communication adapter that greatly improves its poor transmission characteristics. It is an invention related to the technology.

  Development is progressing with a focus on "modems" with the main purpose of speeding up power line communications. 12 generally has a block configuration as shown in FIG. 12, has a power and information signal coupling function and a multiple modulation / demodulation communication control function, and is connected to an information device such as a personal computer. Therefore, it is almost impossible to expect a function for fundamentally improving the power line network characteristics such as comprehensive transmission characteristic improvement of the power line itself, suppression of noise from other home appliances, countermeasures for fluctuations in load impedance, and suppression of common mode. Rather, technology development is centered on how to overcome power transmission characteristics on the premise that they are poor.

  In addition, as a technique related to the present invention, there is a “noise filter” as shown in FIG. 13, but the purpose is to suppress noise generated from home appliances or the like or prevent noise from flowing into information equipment, and the power line itself It is not intended to improve the overall transmission characteristics.

  Further, as a common mode high-frequency noise filter, for example, a ferrite core having a split sleeve structure as shown in FIG. 14 is generally used as a noise absorption type inductance circuit in general. However, this common mode filter is a noise filter for each electronic information device such as a personal computer, and is used by penetrating the power cable in the immediate vicinity of the electronic device. It is not intended to improve the transmission characteristics of the entire power line. Absent.

  Furthermore, as a measure against low load impedance of home appliances, an impedance conversion circuit called a so-called `` impedance upper '' is also inserted between the power line and the home appliance, but this is also a limited purpose of use, It is not a comprehensive improvement measure for various technical problems of power line transmission characteristics.

  For the purpose of power line communication (PLC), modems that make full use of OFDM and CDMA technology and information terminal devices incorporating them are being developed to overcome the poor transmission characteristics.

  However, the transmission characteristics of power lines that are not originally installed as high-speed communication networks become worse as the frequency band becomes higher. In other words, there are many branches and discontinuities, and various noises from various connected home appliances are easily mixed, and further, the time fluctuation of the load impedance of the home appliances is large. Is a very poor transmission characteristic, and presently has a problem of constituting an unstable communication network. In detail, poor frequency characteristics caused by discontinuities and branches of power lines, load impedance characteristics of home appliances and dynamic input impedance fluctuations, various noises from home appliances, non-uniform lines There is a problem such as emission of unnecessary electromagnetic waves due to the common mode due to the structure and the like.

  For such problems, there is a limit only by improving the information terminal technology of modems and information communication equipment, and it is essential to improve the transmission characteristics of the power line itself, but at present, the transmission characteristics of the power line itself are indispensable. Development of improved technology is still inadequate.

  Therefore, the present invention aims to comprehensively improve the transmission characteristics of the power line itself, and by applying the technology of the present invention, a high-speed home network having high versatility can be constructed quickly and at low cost. Become. In other words, by combining the present invention and power line modem technology and information terminal equipment, which are under development, high-speed and high-quality home network communication can be quickly performed at a low cost in any room where a power line is installed. Can be built.

  The power line communication adapter according to the present invention is connected in series near the first input port between the conductor lines of the first input port connected to the power supply side and the second input port connected to the load side. A choke coil is connected, a capacitor is connected in parallel near the second input port, a conductor line between the first input port and the choke coil is branched, and a capacitor is interposed in the branch line. At the same time, the terminal is used as a third input port. As described above, in the present invention, the choke coil and the capacitor are connected in series between the conductor lines, the power side end of the conductor line is the first input / output port, and the load side end is the second input / output port. Since the conductor line between the input / output port side and the choke coil is branched, a capacitor is disposed on the branch line, and the terminal of the branch line is used as the third input / output port. The high frequency from the second input / output port side is not conveyed to the first input / output port and the third input / output port by the capacitor and choke coil, and is further required for communication by the capacitor on the branch line Only a high frequency reaches the third input / output port, and a communication path having high transmission characteristics is formed between the first input / output port and the third input / output port. Rukoto can. Further, the choke coil is formed over both conductor lines using a single core, and it is possible to reduce the size. In spite of constituting a communication path having a small size and high transmission characteristics as described above, the circuit components and elements used are inexpensive, and low cost can be realized. Specific usage forms in the case of the present invention include a form fitted in an outlet, a form configured on a track, and the like. However, depending on the conductor line, it is necessary to use a high voltage capacitor.

  The power line communication adapter according to the present invention is such that a resistor is connected to the third input / output port as necessary. As described above, in the present invention, since the resistor is connected to the third input / output port, in the environment where the third input / output port for connecting the information communication device or the like is not used, the second input / output port is connected. Noise suppression and load impedance countermeasures can be realized. Here, when an information communication device is connected, it can function as an input / output port, and when it is not connected, the port can be switched and used so as to be connected by a resistor as described above.

  The power line communication adapter according to the present invention is such that a common mode choke coil is connected between the branch lines as necessary. As described above, in the present invention, since the common mode choke coil is connected between the branch lines, it is possible to suppress the extraction and extraction of the common mode, which is an unnecessary signal for the differential mode which is the main transmission mode, and to other devices. Unwanted electromagnetic radiation that causes interference noise can be suppressed. As a specific usage form in the case of the present invention, it is possible to adopt a form in which it is loaded on a low-voltage lead-in wire, a branch portion of an indoor wiring system or the like.

  Moreover, the power line communication adapter according to the present invention is provided with a coil having a resistor connected to the core of the common mode choke coil as necessary. As described above, in the present invention, since the coil having the resistor connected to the core of the common mode choke coil is disposed, the occurrence of the common mode can be further suppressed.

  In addition, the power line communication adapter according to the present invention includes a first conductor line, a second conductor line, and a third conductor line, between the first conductor line and the second conductor line, and A choke coil and a capacitor are connected between the second conductor line and the third conductor line, and one end of the first conductor line, the second conductor line and the third conductor line is connected to the first input / output port; The other end is used as a fourth input / output port, the first conductor line and the second conductor line on the first input / output port side are connected via two capacitors, and the two capacitors are connected. And the second conductor line on the first input / output port side are branched, and the tip of the branch line is provided as a third input / output port. As described above, in the present invention, there are the first conductor line, the second conductor line, and the third conductor line, between the first conductor line and the second conductor line, and the second conductor line. And a third conductor line, a choke coil and a capacitor are connected, one end of the first conductor line, the second conductor line and the third conductor line is the first input / output port, and the other end is the first conductor line. The first conductor line on the first input / output port side and the second conductor line are connected via two capacitors, and the line between the two capacitors and the second Since the first input / output port side of the second conductor line is branched and the end of the branch line is provided as the third input / output port, the power line communication adapter can be mounted on the single-phase three-wire. High frequency information in the house at the same time as preventing the inflow of noise It is also possible to prevent outflow of the issue of the outdoors. Here, the choke coil between the first conductor line and the second conductor line and between the second conductor line and the third conductor line may be mounted with two cores or one core. it can. Preventing the outflow of high-frequency information signals in the home to the outside is also desired from the viewpoint of security that does not leak the communication contents in the home to the outside.

  In addition, the high frequency termination function power line communication adapter according to the present invention is constructed by connecting a resistor in series with two capacitors and integrating a high frequency impedance termination function circuit with a connector. As described above, the present invention has a high frequency termination function in which a resistor is sandwiched between two capacitors and connected in series, and the high frequency impedance termination function circuit is integrated with the connector. By connecting to the line communication adapter, the generation of standing waves in the high frequency band can be suppressed and the transmission characteristics can be greatly improved. More specifically, when the outlet portion is open, reflection occurs, and the traveling wave and the backward wave coexist to generate a standing wave. And an inexpensive termination function. Because it has no communication port like the basic power line communication adapter and has a simple configuration, the power outlet communication adapter is not installed in the outlet part that is not used, but a high frequency termination function power line communication adapter is installed as a whole. As an inexpensive system. When the high frequency termination function power line communication adapter is configured by miniaturizing the connector with a resin mold or the like, the object of cost reduction and miniaturization can be achieved.

  The high-frequency termination function power line communication adapter according to the present invention is configured by integrating a resistor and a capacitor in series and integrating a one-terminal high-frequency impedance termination function circuit with the connector. As described above, the present invention has a high-frequency termination function in which a resistor and a capacitor are connected in series and a one-terminal high-frequency impedance termination function circuit is integrated with the connector. By connecting to the communication adapter, generation of standing waves in the high frequency band can be suppressed, and transmission characteristics can be greatly improved.

  Further, the common mode suppression absorption power line communication adapter according to the present invention is a splittable magnetic core in which the common modes of a plurality of power lines are coupled together so as to be combined, and the low voltage lead line and its ground line Or, it is loaded in an unequal length part, a branch part or even a discontinuous part of the indoor power line system. As described above, in the present invention, the magnetic core is a separable magnetic core in which a common mode of a plurality of power lines is connected in a conjunctive manner, and the low-voltage lead-in line and its ground line or the inequality of the indoor power line system Since it is loaded in the long part, the branch part, and the discontinuous part, the injection extraction of the common mode, which is an unnecessary signal for the differential mode that is the main transmission mode, is suppressed, and it is effective for suppressing unnecessary electromagnetic radiation and improving transmission characteristics. In this common mode suppression absorption power line communication adapter, a magnetic core is used, but a sleeve type core is desirable in order to increase the absorption level. Moreover, by making it possible to divide, it is easy to apply the existing facilities to the power line.

  In addition, the common mode suppression absorption power line communication adapter according to the present invention includes a coil in which a resistor is connected to a magnetic core that can be divided into magnetic flux links so that common modes of a plurality of power lines are coupled together. The magnetic flux interlinks. As described above, in the present invention, a magnetic core having a resistance connected to a magnetic core that can be divided into magnetic fluxes that are linked to each other so that the common modes of a plurality of power lines are connected to each other is magnetically linked to the magnetic material. The mode can be absorbed by resistance.

  In addition, the common mode suppression power line communication adapter according to the present invention includes a coil in which a reactance element is connected to a magnetic core that can be divided into magnetic flux linkages so that the common modes of a plurality of power lines are coupled together. Is a magnetic flux linkage. As described above, in the present invention, a magnetic core having a reactance element connected to a magnetic core that can be divided into magnetic flux links so that the common modes of a plurality of power lines are coupled together is combined with the magnetic body. The degree of suppression of common mode can be improved. In particular, a parallel circuit of a coil and a capacitor can be configured to make use of LC anti-resonance characteristics, and a common mode at a specific frequency can be strongly suppressed.

  In addition, the power line adapter according to the present invention has a configuration in which, when there is a difference in length between a pair of lines in the indoor wiring, the electromagnetic line is surrounded by an induction electromagnetic core in a line having a long electrical length and is bypassed electromagnetically coupled. . As described above, the present invention is between lines in which a length difference occurs in indoor wiring such as an input switch line and an output switch line, and the electrical length is surrounded by the induction electromagnetic core in a long path. It is possible to improve the signal phase difference caused by the difference and to secure a good communication state.

  In addition, the power line adapter according to the present invention has a configuration in which, when a difference in length occurs between a pair of lines in an indoor wiring, the electromagnetic coupling is bypassed via a capacitor in a line having a long electrical length. As described above, the present invention is between lines in which a length difference occurs in an indoor wiring such as an input switch line and an output switch line, and is connected via a capacitor in a path having a long electrical length. Only the signal passes through the capacitor and at least the phase difference of the signal in the communication band can be improved to ensure a good communication state.

  The power line communication network according to the present invention is constructed by applying all or part of the various power line communication adapters. As described above, in the present invention, since all or a part of the various power line communication adapters are applied, a flexible design corresponding to each environment is possible. In addition, most of the power line communication adapters can be easily introduced into existing facilities, which is advantageous from the viewpoint of cost. In addition, by installing this single-phase three-wire PLA for each subscriber at the lead-in branching section on the pole or in the apartment house power room, a high-speed subscriber network including the access system can be constructed quickly and at low cost. it can.

  The present invention is effective for all the above-mentioned problems and is a general-purpose technique that does not impair the original practical feature that anyone can quickly construct a high-speed network at a simple and low cost with power line communication.

  That is, the power line communication adapter of the present invention can be easily used by anyone simply by connecting to an outlet or power line, can be connected to any home appliance, and the power line communication adapter itself has a simple structure and workability as much as possible. The feature is that a high-quality home network can be easily constructed at low cost. Further, if the power line communication adapter having a single-phase three-wire structure is installed between the low-voltage lead-in line and the indoor power line, it is possible to suppress the noise inflow from the outdoors and prevent the leakage of the indoor information signal to the outdoors. Furthermore, if this single-phase three-wire power line communication adapter is installed on a low-voltage lead-in branch on a utility pole or apartment house power room, it is very effective as an adapter for constructing a high-speed access network without interference between subscribers. it can.

  Further, the problem of unnecessary electromagnetic radiation caused by the common mode can be significantly improved by including the power line communication adapter having the common mode suppression / absorption function or the power line communication adapter having a high frequency resistance termination, including the low-voltage lead-in line.

  In addition, in the case of new construction or renovation of a house, install each of these power line communication adapters in an indoor wiring system or low-voltage lead-in line, and further install it using an outlet that incorporates each of these power line communication adapters in advance. It is even more effective.

(First embodiment of the present invention)
A basic power line communication adapter (hereinafter referred to as PLA) according to a first embodiment of the present invention will be described with reference to FIGS. 1 is a basic configuration of a basic power line communication adapter according to the present embodiment, FIG. 2 is an equivalent circuit and application example of the basic power line communication adapter according to the present embodiment, and FIG. 3 is a basic power line according to the present embodiment. This is another application example in which a high-frequency terminating resistor of a communication adapter is incorporated.

  1, the PLA according to the present embodiment connects the choke coil 1 and the capacitor 2 between the conductor lines 11 and 12, one end of the conductor lines 11 and 12 is the first input / output port 21, and the other end is the first end. 2, the conductor lines 11 and 12 on the first input / output port 21 side are branched, the capacitor 3 is disposed on the branch line 13, and the tip of the branch line is third. The input / output port has a configuration. The first input / output port 21 is connected to the power line, the second input / output port 22 is connected to the load side, and the third input / output port 23 is connected to the communication device.

  As shown in FIG. 1 (a), the configuration is thoroughly simplified, and at the same time, necessary functions, performance and economy are realized. That is, it is a three-terminal interface circuit in which a high-frequency information signal port 23 is connected to an LPF composed of a choke coil 1 and a capacitor 2 via two capacitors 3. In particular, the high frequency information signal port 23 is characterized by a simple configuration with only two capacitors 3. As a result, it is possible to greatly reduce the size and cost as compared with conventional noise filters and modem input / output circuits. Furthermore, the circuit configuration via the capacitor 3 has good electrical interface characteristics for high-frequency signals that are inherently injected and extracted to the power line in the balanced transmission mode. FIG. 2 (a) is an equivalent circuit, and FIG. 2 (b) is a basic connection form when an information communication device is connected. Despite the extremely simple circuit structure, the following functions (1) to (3) can be realized. (1) The power and high-frequency signal of the first input / output port 21 are separated or combined into the second input / output port 22 and the third input / output port 23, respectively. (2) Suppressing device noise leakage from home appliances or information communication devices connected to the second input / output port 22, and suppressing the influence of dynamic load impedance fluctuations of connected devices in the high frequency band on power line transmission characteristics. You can also Therefore, it is possible to overcome degradation of signal transmission characteristics with respect to a low impedance load of a home appliance that is particularly problematic. (3) The extremely simple configuration of the high-frequency band signal port 23 only via two capacitors is one of the important points of the present invention, and the high-frequency information signal is excellent regardless of whether it is a balanced signal or an unbalanced signal. Can be injected and extracted.

Further, when the third input / output port 23 is not used, the open end in the high frequency band can be easily switched to the matched end by simply connecting a “high frequency terminal PLA” described later to the third input / output port 23. You can also. In the case of connection of general household appliances that do not require the third input / output port 23 that is a high-frequency information signal terminal, the terminal is terminated in advance at the third input / output port 23 for the purpose of suppressing household appliance noise and measures against load impedance. A PLA having the structure shown in FIG. 3 incorporating a resistor is desirable.
As described above, despite the simple structure of the PLA, the major technical problems of power line communication transmission characteristics can be greatly improved and solved.

  According to the basic power line communication adapter according to the present embodiment, the choke coil 1 and the capacitor 2 are connected between the conductor lines 11 and 12, one end of the conductor lines 11 and 12 is connected to the first input / output port 21, and the other end. As the second input / output port 22, the conductor lines 11 and 12 on the first input / output port 21 side are branched, the capacitor 3 is disposed on the branch line 13, and the tip of the branch line 13 is Since the choke coil 1 and the capacitor 2 form a low-pass filter to reduce unnecessary low frequencies, the high frequency from the second input / output port 22 is also reduced by the capacitor 2 and The choke coil 1 does not carry to the first input / output port and the third input / output port, and only the high frequency necessary for communication is transmitted by the capacitor 3 on the branch line. It can be of reaching the output port 23, constituting a channel having a high transmission characteristic between the first input-output port 21 and the third output port 23.

(Second embodiment of the present invention)
A basic power line communication adapter according to a second embodiment of the present invention will be described with reference to FIG. 4 or FIG. FIG. 4 or FIG. 5 shows the basic configuration of the basic power line communication adapter according to the present embodiment.
In FIG. 4, the basic power line communication adapter according to the present embodiment is configured in the same manner as the basic PLA according to the first embodiment, except that a common mode choke coil is connected between the branch lines 13. It is the structure to do. In addition to suppressing common-mode injection and extraction, which is an unnecessary signal for the differential mode, which is the main transmission mode, it is also effective for suppressing electromagnetic radiation that causes interference noise to other systems.

As described above, according to the basic power line communication adapter according to the present embodiment, since the common mode choke coil is connected between the branch lines, the common mode injection extraction which becomes an unnecessary signal for the differential mode which is the main transmission mode is performed. While suppressing, the unnecessary electromagnetic radiation which becomes the cause of the interference noise to other apparatuses can be suppressed. As a specific usage form in the case of the present invention, it is possible to adopt a form in which it is loaded on a low-voltage lead-in wire, a branch portion of an indoor wiring system or the like.
Note that FIG. 5 has an effect of further suppressing the occurrence of the common mode by adding a common mode absorption resistor to the magnetic core of the third input / output port 23.

(Third embodiment of the present invention)
A basic power line communication adapter according to a third embodiment of the present invention will be described with reference to FIG. FIG. 6 shows a basic configuration of the basic power line communication adapter according to the present embodiment.
In FIG. 6, the basic power line communication adapter according to the present embodiment includes a first conductor line, a second conductor line, and a third conductor line, and the first conductor line 14, the second conductor line 15, and the like. And the choke coil 1 and the capacitor 3 are connected between the second conductor line 15 and the third conductor line 14, and the first conductor line 14, the second conductor line 15 and the third conductor are connected. The line 14 has one end as a first input / output port 21 and the other end as a fourth input / output port 24. The first conductor line 14 and the second conductor line on the first input / output port 21 side. 15 is connected via two capacitors 2, the line between the two capacitors 2 and the second conductor line 15 on the first input / output port 21 side are branched, and the end of the branch line is 3 as input / output port 23 That. Briefly, it is an embodiment of a single-phase three-wire PLA, and has a structure in which one of the conductor lines of each of the two basic PLAs is shared as a single-phase three-wire neutral wire 15 (ground wire). Installed at the connection part (for example, switchboard input part) of the outdoor low voltage lead-in line and the indoor power line to prevent the inflow of noise from the outdoors and the indoor information signal can also be prevented from flowing out to the outdoors Single-phase three-wire PLA. Here, an outdoor low-voltage lead-in line is connected to the fourth input / output port 24, and the first input / output port 21 is connected to an indoor power line (two systems). The third input / output port 23 is a high-frequency information signal port, which can inject and extract a high-frequency information signal to two indoor power lines via two capacitors 3. Here, the two capacitors 3 are indispensable for high-frequency signal transmission between the two systems, but the third input / output port 23 itself is not necessarily required. In that case, only one capacitor 2 may be used. This single-phase three-wire PLA is installed for each subscriber at a low-voltage lead-in branching section such as a power pole or a power room of a housing complex, so that high-speed access and home network including access system and home network can be easily integrated. Can be built.

Thus, according to the basic power line communication adapter according to the present embodiment, there are the first conductor line 14, the second conductor line 15, and the third conductor line 14, and the first conductor line 14 and the second conductor line 14 are provided. The choke coil 1 and the capacitor 3 are connected between the conductor line 15 and between the second conductor line 15 and the third conductor line 14, and the first conductor line 14, the second conductor line 15 and The third conductor line 14 has one end as a first input / output port 21 and the other end as a fourth input / output port 24. The first conductor line 14 on the first input / output port 21 side The two conductor lines 15 are connected via two capacitors 2, and the line between the two capacitors 2 and the second conductor line 15 on the first input / output port 21 side are branched. Has a third input / output port 23 Because there, the single-phase three-wire can implement power line communication adapter, and at the same time prevents noise inflow from outside, the outflow of the outdoor RF information signal in the home can also be prevented.
Note that the single-phase three-wire PLA according to the present embodiment has a structure using two magnetic cores. However, if there is a margin in magnetic saturation characteristics, the single-phase three-wire PLA can be simplified and combined into one core.

(Fourth embodiment of the present invention)
A high-frequency termination function power line communication adapter according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 shows a basic configuration of the high-frequency termination function power line communication adapter according to the present embodiment.
In FIG. 7A, the high-frequency termination function PLA according to the present embodiment has a configuration in which a resistor 33 is sandwiched between two capacitors 31 and 32 and connected in series, and a high-frequency impedance termination function circuit is integrated with a connector. Thus, since it has a very simple structure in which two high voltage capacitors and a terminating resistor are connected in series, it can be manufactured at low cost. Therefore, it can be installed with a small expense and is very effective in improving the transmission characteristics of the power line. Cost reduction and miniaturization can be achieved by miniaturizing the connector with a resin mold or the like. When a part of the power line made up of many branch parts is close to an open end or a short-circuit end, a standing wave is generated on the branch power line in the high frequency band, and the transmission frequency characteristics are significantly deteriorated. The basic PLA may be connected to all the branch lines, but if a large number of PLAs are installed, there is a possibility that the economy is impaired. As a solution, unnecessary standing waves can be suppressed only by connecting the high-frequency termination function PLA, which can be realized at low cost, to an outlet or the like not connected to home appliances. Therefore, the combined use of the basic PLA and the high-frequency termination function PLA is very effective as a facility cost reduction measure. Further, even when the third input / output port 23 of the basic PLA is not used as an information signal port, impedance matching in the high frequency band can be easily realized by inserting the high frequency termination function PLA into the port 23. You can also.

  As described above, the high-frequency termination function PLA according to this embodiment is characterized in that the resistor 33 is sandwiched between the two capacitors 31 and 32 and connected in series, and the high-frequency impedance termination function circuit is integrated with the connector. Since it has a high-frequency termination function, by connecting to an outlet or the basic power line communication adapter, the generation of standing waves in the high-frequency band can be suppressed and transmission characteristics can be greatly improved. More specifically, when the outlet portion is open, reflection occurs, and the traveling wave and the backward wave coexist to generate a standing wave. And an inexpensive termination function. Because it has no communication port like the basic power line communication adapter and has a simple configuration, the power outlet communication adapter is not installed in the outlet part that is not used, but a high frequency termination function power line communication adapter is installed as a whole. As an inexpensive system.

  As shown in FIG. 7B, the high-frequency termination function PLA according to the present embodiment is configured such that a resistor 35 and a capacitor 34 are connected in series and a one-terminal high-frequency impedance termination function circuit is integrated with the connector. Similarly, by connecting to an outlet or the basic power line communication adapter, generation of standing waves in the high frequency band can be suppressed, and transmission characteristics can be greatly improved.

(Fifth embodiment of the present invention)
A common mode suppression absorption power line communication adapter according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 8 shows a basic configuration of the common mode suppression absorption power line communication adapter according to the present embodiment.
In FIG. 8, the common mode suppression / absorption PLA according to the present embodiment is a separable magnetic core 41 in which the common modes of a plurality of power lines are coupled together so as to be combined, and the low voltage lead line and its ground line Or it is the structure which loads to the unequal length part of an indoor power line system, a branch part, and a discontinuous part.

  In order to be able to load an existing power line, a separable magnetic core 41 is used as shown in FIG. Magnetic flux is linked so that unnecessary common modes on the power line are connected in the same manner, and the magnetic bodies are brought into close contact with each other to form a magnetic circuit to realize a common mode absorption suppression inductance (FIG. 8 (b)). reference). Furthermore, if there is a margin in the power line, if the magnetic flux linkage is performed a plurality of times as shown in FIG. 8 (c), the self-inductance value becomes large, and the common mode suppression effect can be improved accordingly. In the prior art, as a common mode noise filter, a ferrite core with a split sleeve structure is used for each electronic device loaded in the nearest power cable, and is not intended to improve the transmission characteristics of the entire power line. Absent. In this embodiment, a power line is used as a high-frequency network, and multiple low-voltage lead-in wires effective for unnecessary common-mode suppression and branching and discontinuous parts of indoor power lines are loaded to improve integrated transmission characteristics and unnecessary electromagnetic radiation. It is to suppress.

  As described above, the common mode suppression / absorption PLA according to the present embodiment is a separable magnetic core 41 in which the common modes of a plurality of power lines are coupled to each other so that the common modes are combined. Or, it is loaded in the unequal length part, branch part or discontinuous part of the indoor power line system, so that the common mode injection and extraction, which is an unnecessary signal for the differential mode which is the main transmission mode, is suppressed, and unnecessary electromagnetic radiation is suppressed. Effective for improving transmission characteristics.

(Sixth embodiment of the present invention)
A method for manufacturing a display panel device according to the sixth embodiment of the present invention will be described with reference to FIG. FIG. 9 shows a basic configuration of the common mode suppression power line communication adapter according to the present embodiment.
In FIG. 9 (a), the common mode suppression absorption power line communication adapter according to the present embodiment has a resistance to the detachable magnetic core 42 that is flux-linked so that the common modes of a plurality of power lines are combined. In this configuration, the coil connected to 43 is flux-linked to the magnetic body.

  The basic operation is the same as that of the common mode suppression / absorption PLA according to the fifth embodiment, but the characteristic is that the coil connected to the resistor 43 for absorbing the common mode is linked to the magnetic material by the magnetic flux. is there. In this case, a split ferromagnetic material is used for the purpose of applying to existing power lines. However, when installing a new wiring work, a non-split type normal magnetic core is used. Needless to say, it can be used.

  As described above, according to the common mode suppression absorption power line communication adapter according to the present embodiment, the resistor 43 is connected to the separable magnetic core 42 that is flux-linked so that the common modes of a plurality of power lines are coupled together. Since the connected coil is interlinked with the magnetic flux, the common mode can be absorbed by the resistance.

(Seventh embodiment of the present invention)
A common mode suppression power line communication adapter according to a seventh embodiment of the present invention will be described with reference to FIG.
In FIG. 9B, the common mode suppression absorption power line communication adapter according to the present embodiment has a reactance formed on the magnetic core 42 that can be divided so that the common modes of a plurality of power lines are connected to each other. In this configuration, a coil connected to the element 44 is linked to a magnetic material by magnetic flux.

In FIG. 9B, the common mode suppression PLA has the same basic operation as the common mode suppression absorption power line communication adapter according to the fifth embodiment, but further improves the degree of suppression of the common mode. Here, the feature is that the coil connected to the capacitive element 44 is magnetically linked to the magnetic body. That is, unnecessary common mode is strongly suppressed by utilizing the LC anti-resonance characteristics.
Note that the power line communication adapter according to the fifth embodiment to the present embodiment is most effective when applied to a low-voltage lead-in wire in which unnecessary electromagnetic radiation is a problem.

  As described above, according to the common mode suppression power line communication adapter according to the present embodiment, the reactance element 44 is attached to the separable magnetic core 42 that is magnetically linked so that the common modes of the plurality of power lines are coupled together. Since the connected coil is magnetically linked to the magnetic body, the degree of suppression of the common mode can be improved. In particular, a parallel circuit of a coil and a capacitor 44 can be configured to make use of the LC anti-resonance characteristic, and a common mode at a specific frequency can be strongly suppressed.

(Eighth embodiment of the present invention)
A power line adapter according to an eighth embodiment of the present invention will be described with reference to FIG. FIG. 10 is a schematic diagram of the power line adapter according to the present embodiment.
As shown in FIG. 10A, the power line adapter according to the present embodiment includes an input switch line 71 and an output switch line 72 that are switch lines 70 for turning on / off household appliances such as lighting on a power line. This is a configuration surrounded by an induction electromagnetic core 73. Power line transportation uses two power lines, but if there is a difference in the length of the two lines due to the branching of the switch 74 etc., the signal phase will shift and a common mode will occur, and this will cause problems with high-speed communication. May occur. Therefore, with the configuration as described above, the signal phase difference can be improved and a good communication state can be secured. Depending on the length difference and the impedance termination conditions, it is necessary to load a plurality of magnetic cores, and as a result, it is possible to suppress the occurrence of common mode over a wide band.

  The power line adapter according to the present embodiment has a configuration in which the switch line 70 is surrounded by the induction electromagnetic core 73 as shown in FIG. The switch line 71 and the output switch line 72 can be connected via a capacitor 75. In this case, only the high frequency component passes through the capacitor 75, and at least the phase difference of the signal in the communication band is improved, and a good communication state can be ensured. Here, although it is a place which connects the input switch line 71 and the output switch line 72 on the switch line 70, it is desirable that it is the branch base part 70a of the switch line 70 used as a branch line. Similarly to the magnetic core, it is possible to suppress the occurrence of the common mode over a wide band by loading a plurality of capacitors with different positions depending on circumstances.

(Ninth embodiment of the present invention)
A power line communication network according to a ninth embodiment of the present invention will be described with reference to FIG. FIG. 11 is an overview of the power line communication network according to the present embodiment.
The power line communication network according to the present embodiment has a configuration constructed by applying all of the various power line communication adapters. In other words, the basic power line communication adapter 51 according to the first embodiment, the basic power line communication adapter 52 according to the third embodiment, the high frequency termination function power line communication adapter 53 according to the fourth embodiment, In addition, the power line communication network is provided with the common mode suppression absorption power line communication adapter 54 according to the fifth embodiment. Other components of the power line communication network are the PLC server modem 61, the watt-hour meter 62, the distribution board 63, the outlet 64, and the PLC server parent modem 65. However, such components may vary depending on the environment. is there.

  When the communication range is limited to indoors, a single-phase three-wire PLA is installed, for example, at the input section of the distribution board. On the other hand, when a high-speed access home network including an access system is constructed integrally, a single-phase three-wire PLA is installed on a power pole connected to an optical fiber. In that case, a high-speed access system without adjacent interference can be quickly constructed by installing a PLA in each door.

  As described above, according to the power line communication network according to the present embodiment, since all or a part of the various power line communication adapters are applied, a flexible design according to each environment is possible. . In addition, most of the power line communication adapters can be easily introduced into existing facilities, which is advantageous from the viewpoint of cost. In addition, by installing this single-phase three-wire PLA for each subscriber at the lead-in branching section on the pole or in the apartment house power room, a high-speed subscriber network including the access system can be constructed quickly and at low cost. it can.

It is a basic composition of the basic power line communication adapter concerning a 1st embodiment of the present invention. It is an equivalent circuit and application example of the basic power line communication adapter according to the first embodiment of the present invention. It is another application example which incorporated the high frequency termination resistance of the basic power line communication adapter which concerns on the 1st Embodiment of this invention. It is a basic composition of the basic power line communication adapter concerning a 2nd embodiment of the present invention. It is a basic composition of the basic power line communication adapter concerning a 2nd embodiment of the present invention. It is a basic composition of the basic power line communication adapter concerning a 3rd embodiment of the present invention. It is a basic composition of the high frequency termination function power line communication adapter concerning a 4th embodiment of the present invention. It is a basic composition of the common mode suppression absorption power line communication adapter concerning a 5th embodiment of the present invention. It is a basic composition of the common mode control power line communication adapter concerning the 6th or 7th embodiment of the present invention. It is a schematic diagram of the power line which concerns on the 8th Embodiment of this invention. It is a general-view figure of the power line communication network which concerns on the 9th Embodiment of this invention. It is a functional block diagram of the power line communication modem used as background art. It is a circuit block diagram of the noise filter used as background art. FIG. 5 is a diagram showing how the split sleeve core filter is used as a background art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Choke coil 2 Capacitor 3 Capacitor 4 Termination resistor 5 Common mode choke coil 11, 12 Conductor line 13 Branch line 14 Conductor line 15 Neutral wire 21 1st input / output port 22 2nd input / output port 23 3rd input Output port 24 Fourth input / output port 31 Capacitor 32 Capacitor 33 Resistor 34 Capacitor 35 Resistor 41 Magnetic core 42 Magnetic core 43 Resistor 44 Capacitor 51 Basic power line communication adapter 52a, 52b Basic power line communication adapter 53 High frequency termination function power Line communication adapter 54 Common mode suppression absorption power line communication adapter 61 PLC server modem 62 Energy meter 63 Distribution board 64 Outlet 65 PLC server parent modem 66 Pillar transformer 70 Switch line 70a Branch base 71 Input switch Switch line 72 output switch line 73 induction electromagnetic core 74 switch 75 capacitor

Claims (13)

A choke coil is connected in series near the first input port between the conductor lines of the first input port connected to the power supply side and the second input port connected to the load side, and the second A capacitor is connected in parallel near the input port, the conductor lines between the first input port and the choke coil are branched, a capacitor is interposed in the branch line, and the terminal is the third input port. Basic power line communication adapter characterized by this. In the basic power line communication adapter according to claim 1,
A basic power line communication adapter, wherein a resistor is connected to the third input / output port. In the basic power line communication adapter according to claim 1,
A basic power line communication adapter, wherein a common mode choke coil is connected between the branch lines. In the basic power line communication adapter according to claim 3,
A basic power line communication adapter, wherein a coil having a resistor connected to the core of the common mode choke coil is disposed. There are a first conductor line, a second conductor line, and a third conductor line, between the first conductor line and the second conductor line, and between the second conductor line and the third conductor line. A choke coil and a capacitor are connected between the first conductor line, the second conductor line, and the third conductor line as a first input / output port and the other end as a fourth input / output port. The first conductor line on the first input / output port side and the second conductor line are connected via two capacitors, and the line between the two capacitors and the first input / output port side A basic power line communication adapter, characterized in that each of the two conductor lines is branched and a tip of the branch line is provided as a third input / output port. A high-frequency termination function power line communication adapter, characterized in that a resistor is sandwiched between two capacitors and connected in series, and a high-frequency impedance termination function circuit is integrated with the connector. A high-frequency termination function power line communication adapter characterized in that a resistor and a capacitor are connected in series and a one-terminal high-frequency impedance termination function circuit is integrated with the connector. A splittable magnetic core with magnetic flux linkage so that the common modes of multiple power lines are connected in a congruent manner. The low-voltage lead-in wire and its ground wire, or the unequal length part, branching part, and non-existing part of the indoor power line system. Common mode suppression absorption power line communication adapter, characterized in that it is loaded on a continuous part. A common mode suppression absorption power line characterized in that a magnetic core having a resistance connected to a magnetic core that can be divided into magnetic cores that are magnetic flux linked so that the common modes of a plurality of power lines are coupled together is combined. Communication adapter. Common mode suppression absorption power, characterized by the fact that a coil with a reactance element connected to a magnetic core that can be divided into magnetic flux links so that the common modes of multiple power lines are connected together is combined with the magnetic body. Line communication adapter. A power line adapter, characterized in that when there is a difference in length between a pair of lines in an indoor wiring, the line has a long electrical length and is surrounded by an induction electromagnetic core and is bypassed electromagnetically coupled. A power line adapter, characterized in that when there is a difference in length between a pair of lines in an indoor wiring, the line has a long electrical length and is bypass electromagnetically coupled via a capacitor. A power line communication network constructed by applying all or part of the various power line communication adapters according to claim 1.

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