JP2004297249A - Coupler between different phase lines, mounting method therefor, and coupling method between different phase lines - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coupler between different phase lines that can simply and safely be installed in order to obtain power communication between different phase lines of a single phase three-wire system. <P>SOLUTION: In the coupler between the different phase lines, a first high frequency signal transmission transformer 21 is configured by winding a secondary coil of the first high frequency signal transmission transformer 21 spirally to a first phase power line U acting as a primary coil of the first high frequency signal transmission transformer 21 with a sheath layer of the power line U interposed therebetween. A second high frequency signal transmission transformer 22 is configured by winding a secondary coil of the second high frequency signal transmission transformer 22 spirally to a second phase power line W acting as a primary coil of the second high frequency signal transmission transformer 22 with a sheath layer of the power line W interposed therebetween. The secondary coil of the first high frequency signal transmission transformer 21 is connected in series with the secondary coil of the second high frequency signal transmission transformer 22. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a power line communication using a power line installed in a house such as a general house, realizes a single-phase three-wire power line communication, and is simple and safe to install. Things.
[0002]
[Prior art]
In-home power line communication is a method in which a modem or the like is connected to an in-home electric outlet, and information communication within the home is performed using the power line laid in the home as a transmission path. The use of existing power lines and electrical outlets as they are, for example, has attracted attention in recent years because, for example, it is easy to construct a home network connecting computers and peripheral devices or home electric appliances and to realize home informationization.
[0003]
In the current system in Japan, the frequency band that can be used for power line communication is defined as 10 kHz to 450 kHz, and is used for low-speed data communication (about 9.6 kbps). However, studies are underway to newly add a frequency band of 2 MHz to 30 MHz to a frequency band usable for power line communication so that higher-speed data communication (several tens of Mbps) can be realized in the future.
[0004]
FIG. 9 is a wiring diagram of a conventional in-home single-phase three-wire power line communication system. The electric power of 100 V and 200 V is distributed from the pole transformer 91 to the house using three power lines, that is, the first-phase power line U, the neutral line N, and the second-phase power line W. In the home, the 100 V system passes through the main breaker 92 in the distribution board and passes through the first power distribution system having the power line U and the neutral line N as a pair, and the second power system having the power line W and the neutral line N as a pair. Power is distributed to the distribution system separately.
[0005]
Since the modem 93 and the modem 94 connected to the first power distribution system are in the same circuit, they can easily communicate with each other. That is, data transmitted from the modem 93 is input to the power line U and the neutral line N of the first phase as differential signals. This differential signal is easily and well received by the modem 94 in the same distribution system. This is power line communication in the same phase.
[0006]
However, the power line communication between the modem 93 or the modem 94 connected to the first power distribution system and the modem 95 connected to the second power distribution system is called out-of-phase power line communication, In this state, good communication cannot be performed.
[0007]
In the single-phase three-wire system, the neutral line N is common, but the first-phase power line U and the second-phase power line W are in different phases, and these are located in the pole transformer 91. , Just connected. Therefore, in the frequency band of several tens of kHz or more used for power line communication, the first power distribution system and the second power distribution system operate as independent circuits. That is, the differential signal input to the first power distribution system from the modem 93 or the modem 94 is significantly attenuated at the reception point of the modem 95 connected to the second power distribution system. Signal cannot be detected.
[0008]
Therefore, in the single-phase three-wire power communication, a special mechanism is required to realize communication between different-phase lines.
[0009]
To solve this, as shown in FIG. 9, a different-phase line coupler using a condenser 96 or a high-pass filter (not shown) is installed inside the main breaker 92 or in the vicinity thereof, and Has been proposed for connecting the two at high frequencies (see Patent Document 1).
[0010]
However, installing such a condenser or high-pass filter inside an existing distribution board requires high-voltage circuit work, which requires construction by a chief electrician or electrician, and does not have these qualifications. The general public is prohibited from making such attachments.
[0011]
[Patent Document 1] JP-A-2002-232332
[0012]
[Problems to be solved by the invention]
In the prior art, there is a problem that special construction is required to realize single-phase three-wire power communication between different-phase lines, and it cannot be easily implemented in ordinary homes.
[0013]
Therefore, an object of the present invention is to provide a different-phase line coupler capable of being easily and safely installed and realizing a single-phase three-wire type different-phase line power communication, and a related technology thereof.
[0014]
[Means for Solving the Problems]
The out-of-phase power line coupler according to claim 1 is used for out-of-phase power line communication using a single-phase three-wire power line including a first-phase power line, a neutral line, and a second-phase power line. A different-phase line coupler, wherein the first-phase power line and the second-phase power line are not in contact with any conductor of the first-phase power line and the second-phase power line, A coupling unit that cuts off at a commercial power supply frequency and is electrically connected in a high frequency range where power line communication is performed.
[0015]
According to this configuration, the out-of-phase line coupler is in non-contact with the conductor of the power line, and can connect the out-of-phase lines at a high frequency to transmit a power line communication signal between the out-of-phase lines.
[0016]
In the out-of-phase line coupler according to claim 2, the coupling unit includes a first high-frequency signal transmission transformer having a primary coil and a secondary coil, and a second high-frequency signal transmission similarly having a primary coil and a secondary coil. A first high-frequency signal transmission transformer, a first-phase power line as a primary coil, a second high-frequency signal transmission transformer, a second-phase power line as a primary coil, and a first high-frequency signal The secondary coil of the transmission transformer and the secondary coil of the second high-frequency signal transmission transformer are connected in series.
[0017]
According to this configuration, the high-frequency signal transmission transformer using the electromagnetic induction effect can couple the different-phase lines at a high frequency and transmit the signal of the power line communication.
[0018]
According to the third aspect of the present invention, the first high-frequency signal transmission transformer and the second high-frequency signal transmission transformer are air-core transformers.
[0019]
According to this configuration, a high-frequency signal transmission transformer can be realized without using a ferromagnetic core. Further, since the ferromagnetic core is not used, there is an advantage that the cutoff efficiency of the commercial frequency is high.
[0020]
In the out-of-phase line coupler according to the fourth aspect, each of the first high-frequency signal transmission transformer and the second high-frequency signal transmission transformer includes an integrated ferromagnetic core or a ferromagnetic core that can be divided into a plurality of ferromagnetic cores. , A cored transformer.
[0021]
According to this configuration, by using the ferromagnetic core, the transmission characteristics of the high-frequency signal transmission transformer can be improved, and a high-efficiency out-of-phase line coupler can be realized. Further, if a ferromagnetic core that can be divided into a plurality of pieces is used, installation is extremely simple, and workability can be reduced.
[0022]
In the out-of-phase line coupler according to claim 5, the first high-frequency signal transmission transformer is connected to a first-phase power line, which is a primary coil of the first high-frequency signal transmission transformer, by a secondary of the first high-frequency signal transmission transformer. A coil is spirally wound through a coating layer, and the second high-frequency signal transmission transformer is connected to a second-phase power line, which is a primary coil of the second high-frequency signal transmission transformer, by a second high-frequency signal transmission transformer. The secondary coil of the high-frequency signal transmission transformer is spirally wound through a coating layer.
[0023]
According to this configuration, a ferromagnetic core is not required, and a more inexpensive out-of-phase line coupler can be realized.
[0024]
In the out-of-phase line coupler according to claim 6, the first high-frequency signal transmission transformer and the second high-frequency signal transmission transformer each have a primary-to-secondary coil winding ratio of m to n (m and n). Is a natural number).
[0025]
According to this configuration, the transfer characteristics between the first power distribution system and the second power distribution system are reversible, and the inter-phase power line communication with uniform communication quality can be performed.
[0026]
8. The coupler according to claim 7, wherein the coupling unit includes a high-frequency signal transmission transformer, wherein the first-phase power line is a primary coil, and the second-phase power line is a secondary coil. Is an air core transformer.
[0027]
According to this configuration, the power line of the first phase and the power line of the second phase are directly coupled by the air-core high-frequency signal transmission transformer, so that an out-of-phase line coupler can be easily realized. Also, since only one high-frequency signal transmission transformer is required and no secondary coil is required, a simple and economical out-of-phase line coupler can be realized.
[0028]
9. The coupler according to claim 8, wherein the coupling unit includes a high-frequency signal transmission transformer, wherein the first-phase power line is a primary coil, and the second-phase power line is a secondary coil. Is provided with an integrated ferromagnetic core or a ferromagnetic core that can be divided into a plurality.
[0029]
According to this configuration, the power line of the first phase and the power line of the second phase are directly coupled by a high-frequency signal transmission transformer having a ferromagnetic core as a core, thereby realizing a coupler having a high coupling efficiency between different phases. it can. Also, since only one high-frequency signal transmission transformer is required and no secondary coil is required, a simple and economical out-of-phase line coupler can be realized. Further, if a ferromagnetic core that can be divided into a plurality of parts is used, the installation becomes extremely simple and the workability is excellent.
[0030]
In the out-of-phase line coupler according to claim 9, the coupling portion covers a part of a parallel portion of the first phase power line and the second phase power line, and connects the first phase power line and the second phase power line. A ferromagnetic block that connects the power line with the power line at a high frequency is provided.The ferromagnetic block can be divided into a plurality of parts with a portion covering the power line of the first phase and the power line of the second phase as a boundary. .
[0031]
According to this configuration, the power line of the first phase and the power line of the second phase can be easily coupled at a high frequency. Further, since the ferromagnetic block can be divided into a plurality of blocks, the installation is extremely simple and the workability is excellent.
[0032]
The method of mounting a coupler between different phases according to claim 10, further comprising: a first ferromagnetic core that can be divided into a plurality of pieces; and a second ferromagnetic core that can be divided into a plurality of pieces. A method of mounting a coupler, wherein in a first high-frequency signal transmission transformer, a power line of a first phase is inserted into a core hole portion of a dividable first ferromagnetic core to form a primary coil. Inserting a secondary coil previously wound around a bobbin into a first ferromagnetic core that can be split, and configuring a closed magnetic circuit using the first ferromagnetic core that can be split. In the second high-frequency signal transmission transformer, a step of inserting a power line of a second phase into a core hole portion of a dividable second ferromagnetic core to form a primary coil, Split secondary coil that is wound Inserting a second ferromagnetic core and forming a closed magnetic circuit using the dividable second ferromagnetic core. Connecting the secondary coil and a secondary coil mounted on the second high-frequency signal transmission transformer in series.
[0033]
According to this method, it is not necessary to disconnect the existing power line from the mounting terminal of the distribution board, and it is not necessary to connect the power line to the conductor of the power line.
[0034]
12. The mounting method of a heterophase line coupler according to claim 11, wherein the ferromagnetic core includes a plurality of dividable ferromagnetic cores, the core hole portion of the divisible ferromagnetic core. Inserting a power line of the first phase and a power line of the second phase, and forming a closed magnetic circuit using a divisible ferromagnetic core.
[0035]
According to this method, there is no need to remove the existing power line from the mounting terminal of the distribution board, connect it to the conductor of the power line, or perform separate wiring, so the installation work is extremely simple and its safety is high. Is also very high.
[0036]
The method for mounting a coupler between different phases according to claim 12 includes a step of inserting a power line of the first phase and a power line of the second phase into the plurality of divided ferromagnetic blocks. Forming a closed magnetic circuit by covering a part of a parallel portion of the first phase power line and the second phase power line with the divided ferromagnetic block.
[0037]
According to this method, the same effect as that of the eleventh aspect can be expected.
[0038]
The method for coupling between different-phase lines according to claim 13, wherein the single-phase three-wire type power line including a first-phase power line, a neutral line, and a second-phase power line is used. In the method for coupling between different phase lines, wherein the first phase power line and the second phase power line are not in contact with any conductor of the first phase power line and the second phase power line. And a coupling step of cutting off at a commercial power supply frequency and electrically coupling in a high frequency range where power line communication is performed.
[0039]
According to this method, there is provided a coupling method between different-phase lines that is not in contact with the conductor of the power line and that connects the different-phase lines at a high frequency to enable power line communication signals between the different-phase lines. Can be provided.
[0040]
The coupling method according to claim 14, wherein the coupling step is such that, in the first high-frequency signal transmission transformer having a primary coil and a secondary coil, the power line of the first phase is a primary coil; In a second high-frequency signal transmission transformer having a secondary coil, the power line of the second phase is a primary coil, a secondary coil of the first high-frequency signal transmission transformer, and a secondary coil of the second high-frequency signal transmission transformer Are connected in series, and a first phase power line and a second phase power line, through a first high-frequency signal transmission transformer and a second high-frequency signal transmission transformer, a high-frequency range for power line communication And electrically coupling.
[0041]
According to this method, it is possible to provide a coupling method between out-of-phase lines in which out-of-phase lines are coupled at a high frequency by a high-frequency signal transmission transformer using an electromagnetic induction action, thereby enabling power line communication signals.
[0042]
The coupling method according to claim 15, wherein the coupling step includes, in the first high-frequency signal transmission transformer, a first phase power line that is a primary coil of the first high-frequency signal transmission transformer; The secondary coil of the high-frequency signal transmission transformer is spirally wound through the coating layer, and in the second high-frequency signal transmission transformer, the secondary coil is connected to the power line of the second phase, which is the primary coil of the second high-frequency signal transmission transformer. The secondary coil of the second high-frequency signal transmission transformer is spirally wound through the coating layer, and the secondary coil of the first high-frequency signal transmission transformer and the secondary coil of the second high-frequency signal transmission transformer Are connected in series, and a first-phase power line and a second-phase power line are connected to each other via a first high-frequency signal transmission transformer and a second high-frequency signal transmission transformer to perform high-frequency communication. smell , Comprising the step of electrically coupling.
[0043]
According to this method, it is possible to provide a coupling method between different-phase lines, which does not require a ferromagnetic core and uses a less expensive coupler between different-phase lines.
[0044]
The coupling method according to claim 16, wherein the coupling step uses a high-frequency signal transmission transformer, wherein the power line of the first phase is a primary coil and the power line of the second phase is a secondary coil, The method includes a step of electrically coupling the first-phase power line and the second-phase power line via a high-frequency signal transmission transformer in a high-frequency range where power line communication is performed.
[0045]
According to this method, the power line of the first phase and the power line of the second phase are directly coupled by one high-frequency signal transmission transformer, so that a heterophase line coupler having high coupling efficiency can be realized. Further, a simple and economical out-of-phase line coupler can be realized.
[0046]
The coupling method according to claim 17, wherein the coupling step covers a part of a parallel portion between the first phase power line and the second phase power line using a ferromagnetic block, Connecting the first phase power line and the second phase power line at a high frequency.
[0047]
According to this method, the power line of the first phase and the power line of the second phase can be simply coupled at a high frequency.
[0048]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0049]
(First Embodiment)
[0050]
FIG. 1 is a wiring diagram of the out-of-phase line coupler according to the first embodiment of the present invention.
[0051]
As shown in FIG. 1, the out-of-phase line coupler 12 in the present embodiment includes a first high-frequency signal transmission transformer 13 and a second high-frequency signal transmission transformer 14, and the primary coil of the first high-frequency signal transmission transformer 13 is , The primary coil of the second high-frequency signal transmission transformer 14 is connected to the power line W of the second phase. Further, the secondary coil of the first high-frequency signal transmission transformer 13 is connected in series with the secondary coil of the second high-frequency signal transmission transformer 14. The neutral line N is not connected to the out-of-phase line coupler 12.
[0052]
The operation of the out-of-phase line coupler 12 in this embodiment will be described below.
[0053]
A signal current flows through the primary coil of the first high-frequency signal transmission transformer 13 by a signal transmitted from the modem 15 connected to the first power distribution system including the first phase power line U and the neutral line N. . The current induces a secondary current in the secondary coil of the first high-frequency signal transmission transformer 13. The induced secondary current flows through the secondary coil of the second high-frequency signal transmission transformer 14 connected in series to the secondary coil of the first high-frequency signal transmission transformer 13, and Induce additional current in the 14 primary coils. The current induced in the primary coil of the second high-frequency signal transmission transformer 14 is detected as a signal by the modem 16 connected to the second power distribution system including the power line W and the neutral line N of the second phase. You.
[0054]
Similarly, the signal transmitted from the modem 16 is transmitted from the primary coil of the second high-frequency signal transmission transformer 14 to the secondary coil of the second high-frequency signal transmission transformer 14 by the reciprocity. Detected by the modem 15 via the secondary coil of the transformer 13 and the primary coil of the first high-frequency signal transmission transformer 13 sequentially.
[0055]
In this way, power line communication between the modem 15 and the modem 16 connected to the out-of-phase line becomes possible via the out-of-phase line coupler 12 in the present embodiment.
[0056]
In the out-of-phase line coupler 12 according to the present embodiment, the first high-frequency signal transmission transformer 13 and the second high-frequency signal transmission transformer 14 are configured such that the electromagnetic coupling between the primary coil and the secondary coil is performed in a low frequency band including a commercial frequency. Is very low, and should be sufficiently high in the high frequency range used for power communication.
[0057]
Therefore, each of the first high-frequency signal transmission transformer 13 and the second high-frequency signal transmission transformer 14 may be an air-core transformer or a cored transformer having a ferromagnetic core. The air-core transformer is adopted when the coupling coefficient of the transformer can be obtained to a necessary degree in the frequency range used for the out-of-phase power line communication, and an inexpensive out-of-phase line coupler can be realized. If a higher transformer coupling coefficient is required, a cored transformer with a ferromagnetic core is employed. In this case, a highly efficient out-of-phase line coupler can be realized.
[0058]
Further, the first high-frequency signal transmission transformer 13 and the second high-frequency signal transmission transformer 14 each have a winding ratio between the primary coil and the secondary coil of m to n (m and n are natural numbers). It is preferable from the viewpoint that reversibility is established, but it is not always necessary to satisfy the relationship of the turns ratio.
[0059]
(Second embodiment)
[0060]
FIG. 2 is a wiring diagram of the out-of-phase line coupler according to the second embodiment of the present invention. In FIG. 2, the pole transformer is omitted. In FIG. 2, the same components as those in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted.
[0061]
The out-of-phase line coupler 12 of the present embodiment shown in FIG. 2 includes a first high-frequency signal transmission transformer 21 in which a secondary coil is spirally wound around a first-phase power line U via a coating layer. And a second high-frequency signal transmission transformer 22 in which a primary coil is spirally wound around the power line W of the second phase via the coating layer. The secondary coil and the secondary coil of the second high-frequency signal transmission transformer 22 are connected in series.
[0062]
The out-of-phase line coupler 12 of the present embodiment shown in FIG. 2 is obtained by evolving and simplifying the out-of-phase line coupler of the first embodiment shown in FIG. That is, in the out-of-phase line coupler 12 of the present embodiment, the first high-frequency signal transmission transformer 21 and the second high-frequency signal transmission transformer 22 are air-core transformers, respectively. The primary coil and the primary coil of the second high-frequency signal transmission transformer 22 have one turn. In addition, the number of turns of the secondary coil of the first high-frequency signal transmission transformer 21 and the number of turns of the secondary coil of the second high-frequency signal transmission transformer 22 are selected so that a sufficient signal can be obtained at the high wave number used for power communication. Is done.
[0063]
Therefore, in FIG. 2, the operation of the out-of-phase line power communication between the modem 15 and the modem 16 is the same as the operation of the out-of-phase line power communication between the modem 15 and the modem 16 shown in FIG. The effect is the same.
[0064]
In the out-of-phase line coupler 12 of this embodiment, the secondary coil of the first high-frequency signal transmission transformer 21 and the secondary coil of the second high-frequency signal transmission transformer 22 are respectively connected to the power line U of the first phase and the second coil. Since it is directly wound around the power line W of the phase, it can be compactly mounted.
[0065]
(Third embodiment)
[0066]
FIG. 3 is a wiring diagram of the out-of-phase line coupler according to the third embodiment of the present invention. In FIG. 3, the pole transformer is omitted. Also, in FIG. 3, the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
[0067]
The out-of-phase line coupler 12 of the present embodiment shown in FIG. 3 integrates two high-frequency signal transmission transformers in the out-of-phase line coupler of the first embodiment shown in FIG. 1 and omits an intermediate coil. Structure. That is, the out-of-phase line coupler 12 of this embodiment includes a high-frequency signal transmission transformer 31 composed of a ferromagnetic core, a coil 32 and a coil 33 wound around the transformer, and the coil 32 is connected to the power line U of the first phase. Then, the coil 33 is connected to the power line W of the second phase. Further, coil 32 and coil 33 are wound in opposite directions, and preferably have the same number of turns.
[0068]
The operation of the out-of-phase line coupler 12 in this embodiment will be described below.
[0069]
A signal transmitted from the modem 15 connected to the first power distribution system including the first phase power line U and the neutral line N causes a signal current to flow through the coil 32 of the high-frequency signal transmission transformer 31, Thereby, a magnetic flux is induced in the core of the high-frequency signal transmission transformer 31. This magnetic flux goes around the core, links with the coil 33, and induces a current flowing through the coil 33. The induced current is detected as a signal by the modem 16 connected to the second power distribution system including the second-phase power line W and the neutral line N.
[0070]
Similarly, the signal transmitted from the modem 16 is detected by the modem 15 from the coil 33 via the core of the high-frequency signal transmission transformer 31 and the coil 32 in order, based on the reciprocity.
[0071]
Since the coil 32 and the coil 33 are wound in opposite directions, the commercial current flowing through the first phase power line U and the commercial current flowing through the second phase power line W Induces a small amount of magnetic flux in the core in the opposite direction and cancels each other.
[0072]
The out-of-phase line coupler 12 in this embodiment can be configured to be small and lightweight, and is easy to mount.
[0073]
Although the out-of-phase line coupler 31 shown in FIG. 3 uses a cored transformer, an air-core transformer may be used if a required transformer coupling coefficient can be obtained at the frequency. In that case, the coil 32 and the coil 33 are wound adjacent to or over an air-core bobbin or the like.
[0074]
(Fourth embodiment)
[0075]
FIG. 4 shows a structural diagram of the out-of-phase line coupler according to the fourth embodiment of the present invention.
[0076]
As shown in FIG. 4, the out-of-phase line coupler of the present embodiment includes an upper ferromagnetic core 41a and an upper ferromagnetic core 41b, and a hole 42 formed by the upper and lower ferromagnetic cores is formed by a fourth hole. The power line U of one phase and the power line W of the second phase pass through. The neutral line N passes outside the upper ferromagnetic core 41a.
[0077]
In the out-of-phase line coupler 12 of the third embodiment shown in FIG. 3, an example in which the number of turns of the coil 32 and the coil 33 is three is shown. However, in the fourth embodiment shown in FIG. The number of turns of these coils is one turn.
[0078]
The operation of the out-of-phase line coupler of this embodiment is the same as that of the out-of-phase line coupler 12 of the third embodiment.
[0079]
As shown in FIG. 4, the out-of-phase line coupler of the present embodiment can be made small and lightweight with a simple structure, and its mounting is very simple.
[0080]
As shown in FIG. 4, the heterophase line coupler of this embodiment is divided into two parts, an upper ferromagnetic core 41a and a lower ferromagnetic core 41b. In order to mount the out-of-phase line coupler inside the distribution board, the neutral line N is pushed downward on the downstream side of the main breaker 92 inside the distribution board, so that the power line U of the first phase and the second phase Are pulled slightly upward, and they are inserted into the half-hole portion 42 of the lower ferromagnetic core 41b, and the upper ferromagnetic core 41a is covered from above so as to cover the upper ferromagnetic core 41a. In order to fix the upper ferromagnetic core 41a and the lower ferromagnetic core 41b, the cores may be fixed after pouring an adhesive into the opposing contact surfaces of the two cores. It may be fixed by using a device, or may be fixed by using a separately provided housing.
[0081]
Further, the ferromagnetic core may be divided by a method other than the dividing method illustrated in FIG. 4 so as to be convenient for mounting.
[0082]
The out-of-phase line coupler of the present embodiment does not require any power line to be disconnected or detached from a terminal such as the main breaker 92 when the coupler is mounted, and the work safety is high.
[0083]
(Fifth embodiment)
[0084]
The present inventors have considered the signal transmission principle of the out-of-phase power line communication in the out-of-phase line couplers of the second to fourth embodiments. As a result, to transmit the signal of the out-of-phase power line communication, With the new knowledge that it is sufficient that the magnetic flux induced in the ferromagnetic core by the first phase power line U is at least partially linked to the second phase power line W, The fifth embodiment described below has been devised.
[0085]
FIG. 5 is a structural diagram of the out-of-phase line coupler according to the fifth embodiment of the present invention.
[0086]
As shown in FIG. 5, the out-of-phase line coupler of the present embodiment includes a coupling portion 52 that couples the first-phase power line U and the second-phase power line W at high frequency via magnetic flux, and a top cover portion. 51a and an upper lid 51b. A concave portion 54 is provided at the center of the coupling portion 52 for passing the neutral wire N. The coupling part 52 and the upper lid part 51a pass through the power line U of the first phase and cover a certain length inside the hole 53a formed by them. The coupling part 52 and the upper lid part 51b pass through the power line W of the second phase inside the hole 53b formed by them and cover over a certain length.
[0087]
The coupling portion 52, the upper lid 51a, and the upper lid 51b are ferromagnetic blocks such as ferrite.
[0088]
A signal current from a modem having one end connected to the first-phase power line U flows through the first-phase power line U, and goes around the first-phase power line U inside the coupling portion 52 and the upper cover 51a. Generates induced magnetic flux. A part of the induced magnetic flux passes through the coupling portion 52 and interlinks with the power line W of the second phase, and induces an induced current in the power line W of the second phase. This induced current is detected by a modem having one end connected to the power line W of the second phase. As described above, the out-of-phase power line communication is realized by using the out-of-phase line coupler of the present embodiment.
[0089]
As shown in FIG. 5, the out-of-phase line coupler of this embodiment is divided into a total of three portions: a coupling portion 52, an upper lid portion 51 a, and an upper lid portion 51 b. In order to mount the out-of-phase line coupler inside the distribution board, the first phase power line U and the second phase power line U are hardly moved on the downstream side of the main breaker 92 inside the distribution board. The phase power line W is pushed into the half-hole portions 53a and 53b of the connecting portion 52, and the upper lid 51a and the upper lid 51b are covered from above so as to cover. The neutral line N passes through the concave portion 54 of the connecting portion 52 and is outside the present interphase coupler.
[0090]
In order to fix the connecting portion 52, the upper lid portion 51a, and the upper lid portion 51b, the adhesive may be poured into the opposing contact surfaces of the respective members and then fixed, and the respective members may be banded from outside thereof. It may be fixed in a shape, or may be fixed using a separately provided housing.
[0091]
FIG. 6A is a cross-sectional view of the out-of-phase line coupler according to the fifth embodiment of the present invention, which has been described with reference to FIG. 5, and illustrates a split state.
[0092]
FIG. 6B is a modified cross-sectional view of the out-of-phase line coupler according to the fifth embodiment of the present invention, showing a different example of division.
[0093]
In the division example shown in FIG. 6B, the out-of-phase line coupler of the present embodiment is divided into a left lid 61a, a coupling part 61b, and a right lid 61c. A concave portion 63 is provided at a central portion of the coupling portion 61b to allow the neutral wire N to pass therethrough. The coupling portion 61b and the left lid portion 61a cover a certain length through the power line U of the first phase inside the hole 62a formed by them. The coupling portion 61b and the right lid portion 61c cover a certain length through the power line W of the second phase inside the hole 62b formed by them. The neutral line N passes through the concave portion 63 of the coupling portion 61b.
[0094]
The operation of the out-of-phase line coupler in the division example shown in FIG. 6B is substantially the same as that of the division example shown in FIG.
[0095]
6 (a) and 6 (b), it is sufficient to select an easy-to-wear one, or another dividing method may be adopted.
[0096]
(Sixth embodiment)
[0097]
FIG. 7 is a structural view of the out-of-phase line coupler according to the sixth embodiment of the present invention.
[0098]
The out-of-phase line coupler of this embodiment shown in FIG. 7 focuses on the fact that, when the out-of-phase line coupler is mounted inside the distribution board, the power line usually has at least some movable slack. This is a further evolution of the fifth embodiment. That is, it is a simpler structure and higher efficiency out-of-phase line coupler.
[0099]
As shown in FIG. 7, the out-of-phase line coupler of the present embodiment includes an upper coupling portion 71a and a lower coupling portion 71b, and the upper coupling portion 71a and the lower coupling portion 71b are connected to the power line U of the first phase and the second coupling portion 71b. Hole 72a and a hole 72b for passing the power line W of the second phase.
[0100]
After the mounting, the power line U of the first phase and the power line W of the second phase are covered over a certain length by the upper coupling portion 71a and the lower coupling portion 71b, and the neutral line N is It passes outside the coupling portion 71b.
[0101]
The upper coupling portion 71a and the lower coupling portion 71b are ferromagnetic blocks such as ferrite.
[0102]
The operation of the out-of-phase line coupler of this embodiment shown in FIG. 7 is essentially the same as that of the fifth embodiment shown in FIG. However, the out-of-phase line coupler of this embodiment has no concave portion in the coupling portion as compared with the fifth embodiment, and the power line U of the first phase and the power line W of the second phase are closer to each other. It is more efficient because it is installed in a location.
[0103]
By the way, in the out-of-phase line coupler of the present embodiment shown in FIG. 7, it has already been described that the power line U of the first phase and the power line W of the second phase are brought closer to each other and the magnetic material between both power lines is removed. , FIG.
[0104]
The mounting method of the out-of-phase line coupler of this embodiment shown in FIG. 7 is similar to that of the fourth embodiment shown in FIG. 4, and the description is omitted.
[0105]
FIG. 8A is a cross-sectional view of the out-of-phase line coupler according to the sixth embodiment of the present invention described with reference to FIG.
[0106]
FIG. 8B is a modified cross-sectional view of the out-of-phase line coupler according to the sixth embodiment of the present invention, showing a different example of division.
[0107]
In the division example shown in FIG. 8B, the out-of-phase line coupler of the present embodiment is divided into a left lid 81a, a coupling part 81b, and a right lid 81c. The coupling portion 81b and the left lid portion 81a cover the inside of the hole 82a formed by them through the power line U of the first phase and over a certain length. The coupling portion 81b and the right lid portion 81c cover the inside of the hole 82b formed by them through the power line W of the second phase over a certain length. Neutral wire N passes outside coupling portion 81b.
[0108]
The operation of the out-of-phase line coupler of the division example shown in FIG. 8B is substantially the same as that of the division example shown in FIG.
[0109]
8 (a) and 8 (b), a method which is easy to attach may be selected, or another dividing method may be adopted.
[0110]
【The invention's effect】
Advantageous Effects of Invention According to the present invention, it is possible to provide a coupler between different phases of a home single-phase three-wire power line, which is cut off at a commercial frequency and connected at a high frequency, and a single-phase three-wire type different-phase power communication can be realized. . The out-of-phase line coupler according to the present invention has a simple structure and can be easily and safely installed.
[Brief description of the drawings]
FIG. 1 is a wiring diagram of an out-of-phase line coupler according to a first embodiment of the present invention.
FIG. 2 is a wiring diagram of an out-of-phase line coupler according to a second embodiment of the present invention.
FIG. 3 is a wiring diagram of an out-of-phase line coupler according to a third embodiment of the present invention.
FIG. 4 is a structural diagram of an out-of-phase line coupler according to a fourth embodiment of the present invention.
FIG. 5 is a structural diagram of a heterophase line coupler according to a fifth embodiment of the present invention.
FIG. 6A is a cross-sectional view of a coupler between different phases according to a fifth embodiment of the present invention.
(B) Modified cross-sectional view of the out-of-phase line coupler according to the fifth embodiment of the present invention.
FIG. 7 is a structural diagram of an out-of-phase line coupler according to a sixth embodiment of the present invention.
FIG. 8A is a cross-sectional view of a coupler between different phases according to a sixth embodiment of the present invention.
(B) Modified cross-sectional view of the out-of-phase line coupler according to the sixth embodiment of the present invention.
FIG. 9 is a wiring diagram of a conventional in-house single-phase three-wire power line communication system.
[Explanation of symbols]
U first phase power line
N neutral line
W second phase power line
10 pole transformer
12 Out-of-phase line coupler
13. First high-frequency signal transmission transformer
14 Second high-frequency signal transmission transformer
15, 16 modem
21. First high-frequency signal transmission transformer
22 Second high-frequency signal transmission transformer
31 High-frequency signal transmission transformer
41a Upper ferromagnetic core
41b Lower ferromagnetic core
51a, 51b Upper lid
52 Joint
71a upper joint
71b Lower joint
91 pole transformer
92 Master breaker
93, 94, 95 Modem
96 condenser

Claims (17)

A first-phase power line, a neutral wire, and a different-phase inter-line coupler used for out-of-phase power line communication performed using a single-phase three-wire power line including a second-phase power line,
The first phase power line and the second phase power line are cut off at a commercial power frequency while being out of contact with any conductor of the first phase power line and the second phase power line. An out-of-phase line coupler comprising a coupling portion electrically connected in a high-frequency range for performing power line communication. The connecting portion is
A first high-frequency signal transmission transformer having a primary coil and a secondary coil, and, similarly, a second high-frequency signal transmission transformer having a primary coil and a secondary coil,
The first high-frequency signal transmission transformer, the power line of the first phase as a primary coil,
The second high-frequency signal transmission transformer uses the power line of the second phase as a primary coil,
The heterophase line coupler according to claim 1, wherein a secondary coil of the first high-frequency signal transmission transformer and a secondary coil of the second high-frequency signal transmission transformer are connected in series. The heterophase line-to-line coupler according to claim 2, wherein the first high-frequency signal transmission transformer and the second high-frequency signal transmission transformer are air-core transformers. The said 1st high-frequency signal transmission transformer and said 2nd high-frequency signal transmission transformer are each a cored transformer provided with an integral type ferromagnetic core or a ferromagnetic core which can be divided into a plurality. 2. The heterophase line coupler according to 2. The first high-frequency signal transmission transformer,
A secondary coil of the first high-frequency signal transmission transformer is spirally wound around a power line of the first phase, which is a primary coil of the first high-frequency signal transmission transformer, with a coating layer interposed therebetween. ,
The second high-frequency signal transmission transformer,
A secondary coil of the second high-frequency signal transmission transformer is spirally wound around a power line of the second phase, which is a primary coil of the second high-frequency signal transmission transformer, with a coating layer interposed therebetween. The heterophase line coupler according to claim 2, wherein 3. The first high-frequency signal transmission transformer and the second high-frequency signal transmission transformer each have a primary-to-secondary coil winding ratio of m to n (m and n are natural numbers). 4. 6. The heterophasic interline coupler according to 5. The connecting portion is
The power line of the first phase is a primary coil, the power line of the second phase is a secondary coil, comprising a high-frequency signal transmission transformer,
2. The coupler of claim 1, wherein the high-frequency signal transmission transformer is an air-core transformer. The connecting portion is
The power line of the first phase is a primary coil, the power line of the second phase is a secondary coil, comprising a high-frequency signal transmission transformer,
The heterophase line-to-line coupler according to claim 1, wherein the high-frequency signal transmission transformer includes an integrated ferromagnetic core or a ferromagnetic core that can be divided into a plurality of ferromagnetic cores. The connecting portion is
Ferromagnetic covering a part of a parallel portion of the power line of the first phase and the power line of the second phase, and connecting the power line of the first phase and the power line of the second phase in high frequency, ferromagnetic With body block,
2. The heterophase line coupler according to claim 1, wherein the ferromagnetic block can be divided into a plurality of portions with a portion covering the power line of the first phase and the power line of the second phase as a boundary. A first ferromagnetic core that can be divided into a plurality of pieces, and a second ferromagnetic core that can be divided into a plurality of pieces, comprising the method for mounting a coupler between different phases according to claim 4,
In the first high-frequency signal transmission transformer, a power line of the first phase is inserted into a core hole portion of the dividable first ferromagnetic core to form a primary coil,
Inserting a secondary coil previously wound around a bobbin into the first ferromagnetic core that can be divided,
Configuring a closed magnetic circuit using the first splittable ferromagnetic core,
In the second high-frequency signal transmission transformer, inserting a power line of the second phase into a core hole of the dividable second ferromagnetic core to form a primary coil;
Inserting a secondary coil previously wound around a bobbin into the dividable second ferromagnetic core,
Configuring a closed magnetic circuit using the second ferromagnetic core that can be divided,
Connecting the secondary coil mounted on the first high-frequency signal transmission transformer and the secondary coil mounted on the second high-frequency signal transmission transformer in series, Mounting method. The method for mounting a heterophase line coupler according to claim 8, comprising a ferromagnetic core that can be divided into a plurality of parts.
Inserting the power line of the first phase and the power line of the second phase into the core hole portion of the dividable ferromagnetic core,
Forming a closed magnetic circuit using the splittable ferromagnetic core. A method for installing a coupler between different phases according to claim 9,
Inserting the first-phase power line and the second-phase power line into the plurality of divided ferromagnetic blocks,
Forming a closed magnetic circuit by covering a part of a parallel portion of the power line of the first phase and the power line of the second phase with the plurality of divided ferromagnetic blocks. How to install the coupler in between. A first phase power line, a neutral line, in a different-phase power line communication performed using a single-phase three-wire power line including a second phase power line, a coupling method between different-phase lines,
While not in contact with any conductor of the first phase power line and the second phase power line,
Coupling between different-phase lines, including a coupling step of disconnecting the first-phase power line and the second-phase power line at a commercial power supply frequency and electrically coupling in a high-frequency range where power line communication is performed. Method. The combining step includes:
In a first high-frequency signal transmission transformer having a primary coil and a secondary coil, the power line of the first phase is a primary coil,
In a second high-frequency signal transmission transformer having a primary coil and a secondary coil, the power line of the second phase is a primary coil,
A secondary coil of the first high-frequency signal transmission transformer and a secondary coil of the second high-frequency signal transmission transformer are connected in series,
The first-phase power line and the second-phase power line are electrically connected in a high-frequency range in which power line communication is performed via the first high-frequency signal transmission transformer and the second high-frequency signal transmission transformer. 14. The method for coupling between different phase lines according to claim 13, further comprising the step of coupling. The combining step includes:
In the first high-frequency signal transmission transformer,
On the power line of the first phase, which is a primary coil of the first high-frequency signal transmission transformer, a secondary coil of the first high-frequency signal transmission transformer is spirally wound via a coating layer,
In the second high-frequency signal transmission transformer,
On the power line of the second phase, which is the primary coil of the second high-frequency signal transmission transformer, a secondary coil of the second high-frequency signal transmission transformer is spirally wound via a coating layer,
A secondary coil of the first high-frequency signal transmission transformer and a secondary coil of the second high-frequency signal transmission transformer are connected in series,
The first-phase power line and the second-phase power line are electrically connected in a high-frequency range in which power line communication is performed via the first high-frequency signal transmission transformer and the second high-frequency signal transmission transformer. The method for coupling between different phase lines according to claim 14, further comprising a step of coupling. The combining step includes:
Using a high-frequency signal transmission transformer, wherein the power line of the first phase is a primary coil and the power line of the second phase is a secondary coil,
The method according to claim 13, further comprising electrically coupling the power line of the first phase and the power line of the second phase via the high-frequency signal transmission transformer in a high-frequency range where power line communication is performed. Coupling method between different phases. The combining step includes:
Using a ferromagnetic block, a part of the parallel part of the power line of the first phase and the power line of the second phase is partially covered, and the power line of the first phase and the power line of the second phase are 14. The method for coupling between different-phase lines according to claim 13, further comprising the step of connecting at a high frequency.

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