JP7228774B2 - binding device - Google Patents

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JP7228774B2
JP7228774B2 JP2018233481A JP2018233481A JP7228774B2 JP 7228774 B2 JP7228774 B2 JP 7228774B2 JP 2018233481 A JP2018233481 A JP 2018233481A JP 2018233481 A JP2018233481 A JP 2018233481A JP 7228774 B2 JP7228774 B2 JP 7228774B2
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power line
line
inductive coupling
signal
signal line
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JP2020096293A (en
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友昭 水田
光央 上村
祐介 宮脇
直樹 梅田
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Panasonic Intellectual Property Management Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/56—Circuits for coupling, blocking, or by-passing of signals

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Description

本開示は、電力線に信号線を結合する結合装置に関する。 TECHNICAL FIELD The present disclosure relates to coupling devices for coupling signal lines to power lines.

電力線通信では、家庭内に引き込まれている電力線に高周波信号を重畳させる。電力線に高周波信号を重畳させるために、容量結合方式あるいは誘導結合方式が使用される。容量結合方式では、電力線のインピーダンスが低い場合に高周波信号の注入効率が低下し、誘導結合方式では、電力線のインピーダンスが高い場合に高周波信号の注入効率が低下する。インピーダンスが変化しても高周波信号の注入効率を安定させるために、信号線に流れる高周波信号を電力線に注入する管状の電力線インジェクション部に加えて、信号線に流れる高周波信号を容量素子の端子線を介して電力線に注入する管状の容量インジェクション部が備えられる（例えば、特許文献１参照）。 In power line communication, a high frequency signal is superimposed on a power line drawn into a home. A capacitive coupling method or an inductive coupling method is used to superimpose a high frequency signal on a power line. In the capacitive coupling method, the injection efficiency of the high frequency signal decreases when the impedance of the power line is low, and in the inductive coupling method, the injection efficiency of the high frequency signal decreases when the impedance of the power line is high. In order to stabilize the injection efficiency of the high-frequency signal even if the impedance changes, in addition to the tubular power line injection section that injects the high-frequency signal flowing in the signal line into the power line, the high-frequency signal flowing in the signal line is injected into the terminal line of the capacitive element. A tubular capacitive injection part for injecting into the power line is provided (see, for example, Patent Literature 1).

特開２００９－２１２８３６号公報JP 2009-212836 A

バイパスする容量素子の端子線を介して高周波信号を電力線に注入するために、端子線をコアに貫通させるだけでは、容量結合が弱く、トランスとしての通過損失が大きい。電力線に高周波信号を効率的に注入することが求められる。 In order to inject a high-frequency signal into the power line through the terminal line of the capacitor to be bypassed, if the terminal line is only passed through the core, the capacitive coupling is weak and the passage loss as a transformer is large. Efficient injection of high-frequency signals into power lines is required.

本開示はこうした状況に鑑みなされたものであり、その目的は、電力線のインピーダンスの影響を低減しながら、電力線に信号を効率的に注入する技術を提供することにある。 The present disclosure has been made in view of such circumstances, and an object thereof is to provide a technique for efficiently injecting a signal into a power line while reducing the influence of the impedance of the power line.

上記課題を解決するために、本開示のある態様の結合装置は、負荷に電力を供給するための電力線と、通信装置との間で信号を伝送可能な信号線とに磁気的な結合を生じさせる誘導結合部と、通信装置から誘導結合部を経由して延びる信号線を電力線に接続する電力線接続部と、を備える。通信装置からの信号線は、誘導結合部の一端側に延びるとともに、誘導結合部の他端側から電力線接続部に延びて、電力線接続部において終端される。 In order to solve the above problems, a coupling device according to one aspect of the present disclosure produces magnetic coupling between a power line for supplying power to a load and a signal line capable of transmitting signals between a communication device. and a power line connecting portion connecting a signal line extending from the communication device via the inductive coupling portion to the power line. A signal line from the communication device extends to one end side of the inductive coupling portion, extends from the other end side of the inductive coupling portion to the power line connection portion, and is terminated at the power line connection portion.

本開示によれば、電力線のインピーダンスの影響を低減しながら、電力線に信号を効率的に注入できる。 According to the present disclosure, it is possible to efficiently inject a signal into a power line while reducing the influence of the impedance of the power line.

実施例１に係る配電システムの構成を示す図である。1 is a diagram illustrating a configuration of a power distribution system according to Example 1; FIG. 図２（ａ）－（ｂ）は、図１の機器の構成を示す図である。2(a) and 2(b) are diagrams showing the configuration of the equipment in FIG. 図３（ａ）－（ｂ）は、変形例に係る配電システムの構成を示す図である。FIGS. 3(a) and 3(b) are diagrams showing the configuration of a power distribution system according to a modification. 実施例２に係る機器の構成を示す図である。FIG. 10 is a diagram showing the configuration of a device according to Example 2; 実施例３に係る機器の構成を示す図である。FIG. 10 is a diagram showing the configuration of a device according to Example 3;

（実施例１）
本開示の実施例を具体的に説明する前に、実施例の基礎となった知見を説明する。本実施例は、集合住宅、家庭内等の施設に引き込まれた電力線を介して当該施設に電力を供給する配電システムに関する。配電システムにおいて、電力線に信号を伝送させる電力線通信がなされる。この信号は、例えば、１ＭＨｚから３０ＭＨｚの周波数帯を有しており、電力が有する５０Ｈｚあるいは６０Ｈｚの商用電源周波数とは異なる。電力線通信は、電力線の分岐、電力線のインピーダンス、住宅分電盤、家電機器などの負荷の雑音の影響を受けやすいので、電力線通信における通信の信頼性の確保が重要になる。通信の信頼性を向上させるためには、これらの影響を低減しなければならない。前述のごとく、電力線通信において電力線に信号を重畳させるために、容量結合方式あるいは誘導結合方式が使用される。電力線への信号の注入効率は電力線のインピーダンスの影響を受け、インピーダンスが低い場合に容量結合方式による信号の注入効率が低くなり、インピーダンスが高い場合に誘導結合方式による信号の注入効率が低くなる。 (Example 1)
Prior to specifically describing the embodiments of the present disclosure, knowledge on which the embodiments are based will be described. This embodiment relates to a power distribution system that supplies power to facilities such as housing complexes and homes through power lines connected to the facilities. 2. Description of the Related Art In power distribution systems, power line communication is performed to transmit signals on power lines. This signal has a frequency band of, for example, 1 MHz to 30 MHz, which is different from the commercial power supply frequency of 50 Hz or 60 Hz that electric power has. Power line communication is susceptible to noise from loads such as power line branches, power line impedance, residential switchboards, and electrical appliances, so it is important to ensure communication reliability in power line communication. These effects must be reduced in order to improve communication reliability. As described above, a capacitive coupling method or an inductive coupling method is used to superimpose a signal on a power line in power line communication. The efficiency of signal injection into a power line is affected by the impedance of the power line. When the impedance is low, the signal injection efficiency of the capacitive coupling method is low, and when the impedance is high, the signal injection efficiency of the inductive coupling method is low.

電力線にはさまざまな電気製品が接続されるので、電力線のインピーダンスは大きく変化する。インピーダンスが大きく変化する状況下において、容量結合方式あるいは誘導結合方式が使用される場合、信号の注入効率が変化して、通信の安定性が確保されない。これに対応するために、特許文献１では、信号線に流れる高周波信号を電力線に注入する電力線用のコアと、両極から伸びる端子線により電力線間を接続して高周波信号をバイパスする容量素子と、信号線に流れる高周波信号を容量素子の端子線を介して電力線に注入する容量用のコアとが備えられる。特に、バイパスする容量素子の端子線を介して高周波信号を電力線に注入するために、端子線が容量用のコアに貫通されている。しかしながら、端子線が容量用のコアに貫通されているだけでは、容量結合が弱く、トランスとしての通過損失が大きい。そのため、電力線のインピーダンスの影響を低減しながら、電力線に信号を効率的に注入することが求められる。また、容量用のコアが電力線用のコアに追加すると、部品数が増加する。しかしながら、部品数は少ない方が望ましい。 Since various electric products are connected to the power line, the impedance of the power line changes greatly. When the capacitive coupling method or the inductive coupling method is used under conditions where the impedance changes greatly, the signal injection efficiency changes, and the stability of communication cannot be ensured. In order to cope with this, in Patent Document 1, a power line core that injects a high frequency signal flowing in a signal line into a power line, a capacitive element that connects between the power lines by terminal lines extending from both poles and bypasses the high frequency signal, A capacitive core for injecting a high-frequency signal flowing in the signal line into the power line through the terminal line of the capacitive element is provided. In particular, in order to inject a high-frequency signal into the power line through the terminal line of the capacitor element to be bypassed, the terminal line penetrates the core for the capacitance. However, if the terminal line is only passed through the capacitive core, the capacitive coupling is weak and the passage loss as a transformer is large. Therefore, it is required to efficiently inject a signal into the power line while reducing the influence of the impedance of the power line. Also, if the core for capacitance is added to the core for power line, the number of parts increases. However, fewer parts are desirable.

図１は、配電システム１０００の構成を示す。配電システム１０００は、高圧配電線１０、分岐配電線１２と総称される第１分岐配電線１２ａ、第２分岐配電線１２ｂ、第３分岐配電線１２ｃ、変圧器１４、低圧配電線２０と総称される第１低圧配電線２０ａ、第２低圧配電線２０ｂ、中性線２２、接地線２４、主幹ブレーカ２６、電力線３０と総称される第１電力線３０ａ、第２電力線３０ｂ、住宅分電盤５０と総称される第１住宅分電盤５０ａ、第２住宅分電盤５０ｂ、第３住宅分電盤５０ｃ、第４住宅分電盤５０ｄを含む。住宅分電盤５０の数は「４」に限定されない。変圧器１４は、１次コイル１６、２次コイル１８を含む。 FIG. 1 shows the configuration of a power distribution system 1000. As shown in FIG. The distribution system 1000 includes a high voltage distribution line 10, a first branch distribution line 12a, a second branch distribution line 12b, a third branch distribution line 12c, which are collectively referred to as branch distribution lines 12, a transformer 14, and a low voltage distribution line 20. A first low-voltage distribution line 20a, a second low-voltage distribution line 20b, a neutral wire 22, a ground wire 24, a main breaker 26, a first power line 30a, a second power line 30b, and a residential distribution board 50, which are collectively referred to as power lines 30. A first residential distribution board 50a, a second residential distribution board 50b, a third residential distribution board 50c, and a fourth residential distribution board 50d are included. The number of residential distribution boards 50 is not limited to "4". Transformer 14 includes a primary coil 16 and a secondary coil 18 .

高圧配電線１０は、主幹電力線とも呼ばれ、線間電圧６６００［Ｖ］の三相交流電力を３本の配電線を使用して供給する。分岐配電線１２は、高圧配電線１０から分岐する配電線である。第１分岐配電線１２ａから第３分岐配電線１２ｃは、一端側において、高圧配電線１０の異なった配電線に接続される。第１分岐配電線１２ａから第３分岐配電線１２ｃは、他端側において、変圧器１４の１次コイル１６に接続される。変圧器１４は、例えば、需要家施設の屋上、又は電気室内などに設置される。需要家施設は、商用電力を消費する施設であり、一例として、集合住宅、住宅、オフィスビルであるが、他にも例えば、商業施設、工場、病院などの建物であってもよい。 The high-voltage distribution line 10 is also called a main power line, and supplies three-phase AC power with a line voltage of 6600 [V] using three distribution lines. The branch distribution line 12 is a distribution line branched from the high-voltage distribution line 10 . The first branch distribution line 12a to the third branch distribution line 12c are connected to different distribution lines of the high-voltage distribution line 10 at one end sides. The first branch distribution line 12a to the third branch distribution line 12c are connected to the primary coil 16 of the transformer 14 on the other end side. The transformer 14 is installed, for example, on the roof of a consumer facility or in an electrical room. A consumer facility is a facility that consumes commercial power, and examples thereof include housing complexes, residences, and office buildings, but may also include commercial facilities, factories, hospitals, and other buildings.

変圧器１４は、１次コイル１６と対向して配置される２次コイル１８を備え、６６００［Ｖ］の交流電圧を２００［Ｖ］（あるいは１００［Ｖ］）の交流電圧に変圧（降圧）する。２次コイル１８には、第１低圧配電線２０ａ、第２低圧配電線２０ｂ、中性線２２が接続され、中性線２２は接地線２４を介して接地される。そのため、第１低圧配電線２０ａと第２低圧配電線２０ｂとの間の電圧は２００Ｖであるが、第１低圧配電線２０ａと中性線２２との間の電圧、中性線２２と第２低圧配電線２０ｂとの間の電圧は、それぞれ１００Ｖである。このような電圧を有する電力は、商用電力とも呼ばれ、前述の商用電源周波数を有する。 The transformer 14 includes a secondary coil 18 arranged opposite to the primary coil 16, and transforms (steps down) an AC voltage of 6600 [V] to an AC voltage of 200 [V] (or 100 [V]). do. A first low-voltage distribution line 20a, a second low-voltage distribution line 20b, and a neutral wire 22 are connected to the secondary coil 18, and the neutral wire 22 is grounded through a ground wire 24. Therefore, although the voltage between the first low-voltage distribution line 20a and the second low-voltage distribution line 20b is 200 V, the voltage between the first low-voltage distribution line 20a and the neutral wire 22, the neutral wire 22 and the second The voltage between the low-voltage distribution lines 20b is 100V, respectively. Power with such a voltage is also called utility power and has the aforementioned utility power frequency.

低圧配電線２０および中性線２２は、需要家施設に設置された主幹ブレーカ２６に接続される。主幹ブレーカ２６は、例えば、集合住宅等の需要家施設の中で最も変圧器１４側に接続されるブレーカである。主幹ブレーカ２６は、電力線３０を介して複数の住宅分電盤５０に電力を供給する。この電力は、前述の商用電力に相当する。住宅分電盤５０は、各家庭に設置される分電盤である。各住宅分電盤５０は、電力線通信の機能を有しており、電力線３０を介して他の住宅分電盤５０との間において電力線通信を実行する。 The low-voltage distribution line 20 and the neutral line 22 are connected to a main breaker 26 installed at the customer facility. The main breaker 26 is, for example, a breaker connected closest to the transformer 14 in a consumer facility such as an apartment complex. The master breaker 26 supplies power to a plurality of residential distribution boards 50 via the power line 30 . This power corresponds to the aforementioned commercial power. The residential distribution board 50 is a distribution board installed in each home. Each residential distribution board 50 has a power line communication function, and performs power line communication with other residential distribution boards 50 via the power line 30 .

図２（ａ）－（ｂ）は、住宅分電盤５０の構成を示す。特に、図２（ａ）は、電力線３０に接続される住宅分電盤５０のうち、電力線通信に関する構成を示す。住宅分電盤５０は、信号線６０と総称される第１信号線６０ａ、第２信号線６０ｂ、結合装置１００、負荷１３０、通信装置２００を含む。また、結合装置１００は、誘導結合部１１０と総称される第１誘導結合部１１０ａ、第２誘導結合部１１０ｂ、電力線接続部１２０と総称される第１電力線接続部１２０ａ、第２電力線接続部１２０ｂを含む。 2(a) and 2(b) show the configuration of a residential distribution board 50. FIG. In particular, FIG. 2( a ) shows a configuration related to power line communication in a residential distribution board 50 connected to the power line 30 . The residential distribution board 50 includes a first signal line 60 a , a second signal line 60 b , collectively referred to as signal lines 60 , a coupling device 100 , a load 130 and a communication device 200 . The coupling device 100 also includes a first inductive coupling portion 110a, a second inductive coupling portion 110b, and a first power line connection portion 120a and a second power line connection portion 120b, which are collectively referred to as the inductive coupling portion 110. including.

第１電力線３０ａ、第２電力線３０ｂを介して、前述のごとく住宅分電盤５０に電力が供給される。第１電力線３０ａ、第２電力線３０ｂは、後述する結合装置１００を介して負荷１３０に接続されており、負荷１３０に電力を供給する。そのため、負荷１３０は、負荷１３０に接続され、電力が供給される機器であるといえる。このような負荷１３０は、電力線３０の分岐、電力線３０のインピーダンス、家電機器を含む。また、親機となる通信装置（通信親機）と、複数の子機となる通信装置（通信子機）とが接続された通信システムの場合は、親機および子機が結合点となり、各結合点に接続されたすべての部材が「負荷」といえる。このような負荷１３０の変動により、電力線３０のインピーダンスが変化する。ここで、電力線３０の左側には、図１の主幹ブレーカ２６が配置される。そのため、電力線３０の左側に他の住宅分電盤５０が配置される。 Power is supplied to the residential distribution board 50 as described above via the first power line 30a and the second power line 30b. The first power line 30a and the second power line 30b are connected to the load 130 via the coupling device 100, which will be described later, and supply power to the load 130. FIG. Therefore, it can be said that the load 130 is a device connected to the load 130 and supplied with power. Such loads 130 include power line 30 branches, power line 30 impedance, and home appliances. In addition, in the case of a communication system in which a parent communication device (communication parent device) and multiple child device communication devices (communication slave devices) are connected, the parent device and child devices serve as connection points. Any member connected to a joint point can be said to be a "load". Due to such fluctuations in the load 130, the impedance of the power line 30 changes. Here, the main breaker 26 of FIG. 1 is arranged on the left side of the power line 30 . Therefore, another residential distribution board 50 is arranged on the left side of the power line 30 .

通信装置２００は、電力線通信を実行するモデムであり、その構成は図２（ｂ）に示される。通信装置２００は、送信回路２１０、受信回路２１２、１次コイル２２０、２次コイル２２２、コンデンサ２２４と総称される第１コンデンサ２２４ａ、第２コンデンサ２２４ｂ、電源部２２６を含む。送信回路２１０は、電力線通信における送信処理を実行し、受信回路２１２は、電力線通信における受信処理を実行する。送信回路２１０と受信回路２１２は、１次コイル２２０に並列に接続される。１次コイル２２０は２次コイル２２２と対向して配置され、これらは変圧器を構成する。２次コイル２２２は、第１コンデンサ２２４ａを介して第１信号線６０ａに接続されるとともに、第２コンデンサ２２４ｂを介して第２信号線６０ｂに接続される。このように通信装置２００には、信号線６０が電気的に接続される。 The communication device 200 is a modem that performs power line communication, and its configuration is shown in FIG. 2(b). The communication device 200 includes a transmission circuit 210 , a reception circuit 212 , a primary coil 220 , a secondary coil 222 , a first capacitor 224 a and a second capacitor 224 b collectively referred to as a capacitor 224 , and a power supply section 226 . The transmission circuit 210 executes transmission processing in power line communication, and the reception circuit 212 executes reception processing in power line communication. Transmitting circuit 210 and receiving circuit 212 are connected in parallel to primary coil 220 . A primary coil 220 is arranged opposite a secondary coil 222, which form a transformer. The secondary coil 222 is connected to the first signal line 60a via a first capacitor 224a and is connected to the second signal line 60b via a second capacitor 224b. The signal line 60 is electrically connected to the communication device 200 in this manner.

送信回路２１０は、１次コイル２２０、２次コイル２２２、コンデンサ２２４を介して、信号線６０に出力する電流の大きさを変化させることによって、通信のための信号を信号線６０に出力する。一例として、信号には振幅変調がなされており、信号は１ＭＨｚから３０ＭＨｚの周波数帯を有する。この信号の周波数帯における最小の周波数は、電力線３０における交流電圧の周波数よりも高くされる。このような信号の周波数帯は一例であり、これに限定されない。一方、受信回路２１２は、１次コイル２２０、２次コイル２２２、コンデンサ２２４を介して、信号線６０に出力された信号を受信する。さらに、信号線６０には電源部２２６が接続される。電源部２２６には、後述の電力線接続部１２０から、信号線６０を介して給電がなされる。図２（ａ）に戻る。 The transmission circuit 210 outputs a signal for communication to the signal line 60 by changing the magnitude of the current output to the signal line 60 via the primary coil 220 , the secondary coil 222 and the capacitor 224 . As an example, the signal is amplitude modulated and has a frequency band from 1 MHz to 30 MHz. The minimum frequency in the frequency band of this signal is made higher than the frequency of the alternating voltage on power line 30 . The frequency band of such signals is an example and is not limited to this. On the other hand, the receiving circuit 212 receives the signal output to the signal line 60 via the primary coil 220 , secondary coil 222 and capacitor 224 . Furthermore, the power supply unit 226 is connected to the signal line 60 . Power is supplied to the power supply unit 226 via the signal line 60 from the power line connection unit 120 which will be described later. Return to FIG.

第１信号線６０ａ、第２信号線６０ｂの一端側は、通信装置２００に接続される。第１信号線６０ａ、第２信号線６０ｂの他端側は、通信装置２００から誘導結合部１１０、電力線接続部１２０の方に向かって延びる。第１信号線６０ａ、第２信号線６０ｂは、通信装置２００との間で信号を伝送可能であり、通信装置２００からの信号を伝送したり、通信装置２００への信号を伝送したりする。第１信号線６０ａ、第２信号線６０ｂのうち、誘導結合部１１０と通信装置２００との間の部分が撚り合わされてもよい。この撚り合わせによって、信号線６０が短くなり、信号のＳ／Ｎ（Ｓｉｇｎａｌ ｔｏ Ｎｏｉｓｅ ｒａｔｉｏ）が高くなる。 One end sides of the first signal line 60 a and the second signal line 60 b are connected to the communication device 200 . The other end sides of the first signal line 60 a and the second signal line 60 b extend from the communication device 200 toward the inductive coupling section 110 and the power line connection section 120 . The first signal line 60 a and the second signal line 60 b can transmit signals to and from the communication device 200 , and transmit signals from the communication device 200 and signals to the communication device 200 . A portion of the first signal line 60a and the second signal line 60b between the inductive coupling section 110 and the communication device 200 may be twisted. This twisting shortens the signal line 60 and increases the S/N (Signal to Noise ratio) of the signal.

第１誘導結合部１１０ａ、第２誘導結合部１１０ｂは、例えばフェライトなどの磁性材料により円環状に形成されたコア１１２である。コア１１２の中央には円形の貫通孔が設けられる。貫通孔には、電力線３０および信号線６０が通される。具体的に説明すると、第１誘導結合部１１０ａの貫通孔には、第１電力線３０ａと第１信号線６０ａが通され、第２誘導結合部１１０ｂの貫通孔には、第２電力線３０ｂと第２信号線６０ｂが通される。第１誘導結合部１１０ａは、第１電力線３０ａと第１信号線６０ａとに磁気的な結合を生じさせ、第２誘導結合部１１０ｂは、第２電力線３０ｂと第２信号線６０ｂとに磁気的な結合を生じさせる。つまり、電力線３０、信号線６０、コア１１２によって誘導結合方式のカプラが構成される。ここで、コア１１２は、電力線３０に流れる電流により飽和しない磁束密度を発生可能な程度の大きさにされる。 The first inductive coupling portion 110a and the second inductive coupling portion 110b are cores 112 that are annularly formed of a magnetic material such as ferrite. A circular through hole is provided in the center of the core 112 . The power line 30 and the signal line 60 are passed through the through hole. Specifically, the first power line 30a and the first signal line 60a are passed through the through hole of the first inductive coupling portion 110a, and the second power line 30b and the second signal line 60a are passed through the through hole of the second inductive coupling portion 110b. 2 signal line 60b is passed. The first inductive coupling portion 110a magnetically couples the first power line 30a and the first signal line 60a, and the second inductive coupling portion 110b magnetically couples the second power line 30b and the second signal line 60b. bond. That is, the power line 30, the signal line 60, and the core 112 constitute an inductive coupler. Here, the core 112 is made large enough to generate a magnetic flux density that does not saturate with the current flowing through the power line 30 .

第１電力線接続部１２０ａは第１誘導結合部１１０ａと負荷１３０との間に配置され、第２電力線接続部１２０ｂは第２誘導結合部１１０ｂと負荷１３０との間に配置される。第１電力線接続部１２０ａの一端側には、第１電力線３０ａと第１信号線６０ａとが接続される。つまり、第１電力線接続部１２０ａは、一端側において、第１電力線３０ａに第１信号線６０ａを電気的に接続する。また、第１電力線接続部１２０ａの他端側には、負荷１３０が電気的に接続される。一方、第２電力線接続部１２０ｂの一端側には、第２電力線３０ｂと第２信号線６０ｂとが接続される。つまり、第２電力線接続部１２０ｂは、一端側において、第２電力線３０ｂに第２信号線６０ｂを電気的に接続する。また、第２電力線接続部１２０ｂの他端側には、負荷１３０が電気的に接続される。このように、電力線接続部１２０は、通信装置２００から誘導結合部１１０を経由して延びる信号線６０を電力線３０に接続する。負荷１３０には、電力線３０によって電力が供給される。 The first power line connection portion 120 a is arranged between the first inductive coupling portion 110 a and the load 130 , and the second power line connection portion 120 b is arranged between the second inductive coupling portion 110 b and the load 130 . The first power line 30a and the first signal line 60a are connected to one end side of the first power line connection portion 120a. That is, the first power line connecting portion 120a electrically connects the first signal line 60a to the first power line 30a at one end side. A load 130 is electrically connected to the other end of the first power line connection portion 120a. On the other hand, the second power line 30b and the second signal line 60b are connected to one end side of the second power line connecting portion 120b. That is, the second power line connection portion 120b electrically connects the second signal line 60b to the second power line 30b at one end. A load 130 is electrically connected to the other end of the second power line connection portion 120b. Thus, the power line connection unit 120 connects the signal line 60 extending from the communication device 200 via the inductive coupling unit 110 to the power line 30 . Power is supplied to the load 130 by the power line 30 .

ここで、誘導結合部１１０と負荷１３０との間に低インピーダンス素子（図示せず）が配置されてもよい。例えば、低インピーダンス素子としては、コンデンサが挙げられ、電力線接続部１２０に接続される。また、図２（ａ）の第１電力線３０ａと第２電力線３０ｂをさらに左側に延ばした位置に、通信装置２００の通信対象とする他の通信装置（図示せず）が、別の誘導結合部１１０（図示せず）と別の電力線接続部１２０（図示せず）と介して接続される。つまり、他の通信装置は、誘導結合部１１０から、電力線接続部１２０とは反対側に配置される。 Here, a low impedance element (not shown) may be arranged between the inductive coupling part 110 and the load 130 . For example, the low impedance element includes a capacitor, which is connected to the power line connection section 120 . Further, another communication device (not shown) to be communicated with by the communication device 200 is connected to another inductive coupling section at a position further extending the first power line 30a and the second power line 30b in FIG. 2(a) to the left. 110 (not shown) and another power line connection 120 (not shown). In other words, the other communication device is arranged on the opposite side of the inductive coupling unit 110 to the power line connection unit 120 .

以下では、このような構成における、（１）電力線３０のインピーダンスが小さい場合における通信装置２００による信号の送信動作、（２）電力線３０のインピーダンスが小さい場合における通信装置２００による信号の受信動作を説明する。さらに、これらに続いて、（３）電力線３０のインピーダンスが大きい場合における通信装置２００の動作を説明する。 In the following, (1) a signal transmission operation by the communication device 200 when the impedance of the power line 30 is low, and (2) a signal reception operation by the communication device 200 when the impedance of the power line 30 is low will be described. do. Furthermore, following these, (3) the operation of the communication device 200 when the impedance of the power line 30 is high will be described.

（１）電力線３０のインピーダンスが小さい場合における通信装置２００による信号の送信動作
通信装置２００が信号線６０に信号を出力すると、信号が各誘導結合部１１０を通過するときに各誘導結合部１１０に磁束が発生する。各誘導結合部１１０で発生した磁束によって、電力線３０に流れる交流電流に信号が重畳される。したがって、発生した磁束を介した磁気結合により、一対の電力線３０に供給される交流電力に信号が重畳される。 (1) Operation of Signal Transmission by Communication Device 200 When Power Line 30 Has Low Impedance A magnetic flux is generated. A signal is superimposed on the alternating current flowing in the power line 30 by the magnetic flux generated at each inductive coupling portion 110 . Therefore, a signal is superimposed on the AC power supplied to the pair of power lines 30 by magnetic coupling via the generated magnetic flux.

（２）電力線３０のインピーダンスが小さい場合における通信装置２００による信号の受信動作
他の住宅分電盤５０に含まれる他の通信装置２００（図示せず）によって送信された信号も、（１）の場合と同様に、電力線３０に流れる交流電流に重畳されている。交流電流に重畳された信号が、住宅分電盤５０の各誘導結合部１１０を通過するときに各誘導結合部１１０に磁束が発生する。その磁束によって信号線６０に信号が出力され、信号線６０に出力された信号は通信装置２００によって受信される。 (2) Reception operation of signal by communication device 200 when impedance of power line 30 is small As in the case, it is superimposed on the alternating current flowing in the power line 30 . Magnetic flux is generated in each inductive coupling portion 110 when the signal superimposed on the alternating current passes through each inductive coupling portion 110 of the residential distribution board 50 . A signal is output to the signal line 60 by the magnetic flux, and the signal output to the signal line 60 is received by the communication device 200 .

（３）電力線３０のインピーダンスが大きい場合における通信装置２００の動作
電力線３０のインピーダンスが大きければ、通信装置２００が信号線６０に信号を出力しても、各誘導結合部１１０には磁束が発生しない。そのため、各誘導結合部１１０において交流電流に信号が重畳されない。しかしながら、各電力線接続部１２０において電力線３０と信号線６０とが接続されているので、通信装置２００は電力線接続部１２０において電力線３０に電力を直接印加可能である。そのため、通信装置２００が信号線６０に出力した信号は、電力線接続部１２０において一対の電力線３０に供給される交流電力に重畳される。通信装置２００が信号を受信する場合も同様に、電力線接続部１２０において一対の電力線３０に供給される交流電力から信号が受信される。 (3) Operation of communication device 200 when impedance of power line 30 is high If the impedance of power line 30 is high, even if communication device 200 outputs a signal to signal line 60, no magnetic flux is generated in each inductive coupling section 110. . Therefore, no signal is superimposed on the alternating current in each inductive coupling section 110 . However, since the power line 30 and the signal line 60 are connected at each power line connection portion 120 , the communication device 200 can directly apply power to the power line 30 at the power line connection portion 120 . Therefore, the signal output to the signal line 60 by the communication device 200 is superimposed on the AC power supplied to the pair of power lines 30 in the power line connection section 120 . Similarly, when the communication device 200 receives a signal, the signal is received from the AC power supplied to the pair of power lines 30 at the power line connector 120 .

負荷１３０が小さい場合、第１電力線接続部１２０ａにおいて重畳された交流電流は、第１電力線接続部１２０ａから負荷１３０に入力された後、負荷１３０を経由して第２電力線接続部１２０ｂから第２電力線３０ｂに出力される。一方、第２電力線接続部１２０ｂにおいて重畳された交流電流は、第２電力線接続部１２０ｂから負荷１３０に入力された後、負荷１３０を経由して第１電力線接続部１２０ａから第１電力線３０ａに出力される。つまり、第１電力線３０ａにおける第１誘導結合部１１０ａと第１電力線接続部１２０ａとの間には、複数種類の経路を流れてくる交流電流が存在する。第２電力線３０ｂにおいても同様である。 When the load 130 is small, the alternating current superimposed on the first power line connection portion 120a is input to the load 130 from the first power line connection portion 120a, and then passes through the load 130 and flows from the second power line connection portion 120b to the second power line connection portion 120b. Output to the power line 30b. On the other hand, the alternating current superimposed at the second power line connection portion 120b is input to the load 130 from the second power line connection portion 120b, and then output from the first power line connection portion 120a to the first power line 30a via the load 130. be done. In other words, alternating current flows through a plurality of paths between the first inductive coupling portion 110a and the first power line connection portion 120a in the first power line 30a. The same applies to the second power line 30b.

このような状況下において、これらの交流電流の位相が異なることによって、これらの交流電流が互いに打ち消し合わないようにしなければならない。そのため、誘導結合部１１０と電力線接続部１２０との間との距離は、信号線６０において伝送される信号の最短波長の１／２以下にされる。例えば、誘導結合部１１０と電力線接続部１２０との間との距離は、信号線６０において伝送される信号の最短波長の１／４にされる。信号の最大周波数を２８ＭＨｚとする場合、誘導結合部１１０と電力線接続部１２０との間との距離は２．６８ｍとされる。 Under such circumstances, it must be ensured that these alternating currents do not cancel each other out due to their being out of phase. Therefore, the distance between the inductive coupling portion 110 and the power line connection portion 120 is set to 1/2 or less of the shortest wavelength of the signal transmitted on the signal line 60 . For example, the distance between the inductive coupling section 110 and the power line connection section 120 is set to 1/4 of the shortest wavelength of the signal transmitted on the signal line 60 . When the maximum signal frequency is 28 MHz, the distance between the inductive coupling section 110 and the power line connection section 120 is 2.68 m.

図２（ａ）に示されるように、誘導結合部１１０、電力線接続部１２０、負荷１３０がこの順に並んで配置される。つまり、電力線接続部１２０は、誘導結合部１１０と負荷１３０の間に配置される。これは、仮に、電力線接続部１２０と負荷１３０との間に誘導結合部１１０を配置させると、誘導結合部１１０の配置によってインダクタンスが増加し、負荷１３０に印加される電圧が低下してしまうからである。 As shown in FIG. 2A, the inductive coupling portion 110, the power line connection portion 120, and the load 130 are arranged in this order. That is, the power line connection portion 120 is arranged between the inductive coupling portion 110 and the load 130 . This is because if the inductive coupling unit 110 were to be arranged between the power line connection unit 120 and the load 130, the inductance would increase due to the arrangement of the inductive coupling unit 110, and the voltage applied to the load 130 would drop. is.

以下では、図２（ａ）の変形例を説明する。図３（ａ）－（ｂ）は、配電システム１０００の構成を示す。図３（ａ）は、図１において第１変圧器１４ａ、第２変圧器１４ｂが配置される場合の構成を示す。第１変圧器１４ａには第１低圧配電線２０ａ、第２低圧配電線２０ｂ、第１中性線２２ａが接続され、第２変圧器１４ｂには第３低圧配電線２０ｃ、第４低圧配電線２０ｄ、第２中性線２２ｂが接続される。また、第１低圧配電線２０ａ、第２低圧配電線２０ｂ、第１中性線２２ａは図１と同様に主幹ブレーカ２６（図示せず）に接続され、第３低圧配電線２０ｃ、第４低圧配電線２０ｄ、第２中性線２２ｂも主幹ブレーカ２６（図示せず）に接続される。 Below, the modification of Fig.2 (a) is demonstrated. 3(a)-(b) show the configuration of the power distribution system 1000. FIG. FIG. 3(a) shows a configuration in which the first transformer 14a and the second transformer 14b are arranged in FIG. A first low-voltage distribution line 20a, a second low-voltage distribution line 20b, and a first neutral wire 22a are connected to the first transformer 14a, and a third low-voltage distribution line 20c and a fourth low-voltage distribution line are connected to the second transformer 14b. 20d, a second neutral conductor 22b is connected. The first low-voltage distribution line 20a, the second low-voltage distribution line 20b, and the first neutral wire 22a are connected to the main breaker 26 (not shown) in the same manner as in FIG. The distribution line 20d and the second neutral line 22b are also connected to the main breaker 26 (not shown).

ここで、第１変圧器１４ａと第１低圧配電線２０ａとの間には、第１誘導結合部１１０ａ、第１電力線接続部１２０ａとが配置され、第１変圧器１４ａと第１中性線２２ａとの間には、第２誘導結合部１１０ｂ、第２電力線接続部１２０ｂとが配置される。また、第２変圧器１４ｂと第３低圧配電線２０ｃとの間には、第３誘導結合部１１０ｃ、第３電力線接続部１２０ｃとが配置され、第２変圧器１４ｂと第２中性線２２ｂとの間には、第４誘導結合部１１０ｄ、第４電力線接続部１２０ｄとが配置される。第１誘導結合部１１０ａから第４誘導結合部１１０ｄは誘導結合部１１０と総称され、第１電力線接続部１２０ａから第４電力線接続部１２０ｄは電力線接続部１２０と総称され、誘導結合部１１０と電力線接続部１２０は結合装置１００に含まれる。さらに、第１変圧器１４ａ側の誘導結合部１１０と電力線接続部１２０と、第２変圧器１４ｂ側の誘導結合部１１０と電力線接続部１２０とをまたぐように第１信号線６０ａ、第２信号線６０ｂが配置される。 Here, a first inductive coupling portion 110a and a first power line connection portion 120a are arranged between the first transformer 14a and the first low-voltage distribution line 20a, and the first transformer 14a and the first neutral line are arranged. 22a, a second inductive coupling portion 110b and a second power line connection portion 120b are arranged. A third inductive coupling portion 110c and a third power line connection portion 120c are arranged between the second transformer 14b and the third low-voltage distribution line 20c, and the second transformer 14b and the second neutral line 22b are arranged. A fourth inductive coupling portion 110d and a fourth power line connection portion 120d are arranged between the . The first inductive coupling portion 110a to the fourth inductive coupling portion 110d are collectively referred to as the inductive coupling portion 110, the first power line connection portion 120a to the fourth power line connection portion 120d are collectively referred to as the power line connection portion 120, and the inductive coupling portion 110 and the power line Connection 120 is included in coupling device 100 . Further, the first signal line 60a and the second signal line 60a are connected so as to straddle the inductive coupling portion 110 and the power line connection portion 120 on the first transformer 14a side and the inductive coupling portion 110 and the power line connection portion 120 on the second transformer 14b side. A line 60b is placed.

図３（ｂ）は、結合装置１００の構成を示す。これは、図２（ａ）に合わせるように示される。第１負荷１３０ａは、図３（ａ）の第１変圧器１４ａに相当し、第２負荷１３０ｂは、図３（ａ）の第２変圧器１４ｂに相当する。第１信号線６０ａは、第１電力線接続部１２０ａにおいて第１低圧配電線２０ａに接続される。また、第１信号線６０ａは、第１誘導結合部１１０ａの貫通孔に通されるとともに、第３誘導結合部１１０ｃの貫通孔に通される。さらに、第１信号線６０ａは、第３電力線接続部１２０ｃにおいて第３低圧配電線２０ｃに接続される。一方、第２信号線６０ｂは、第２電力線接続部１２０ｂにおいて第１中性線２２ａに接続される。また、第２信号線６０ｂは、第２誘導結合部１１０ｂの貫通孔に通されるとともに、第４誘導結合部１１０ｄの貫通孔に通される。さらに、第２信号線６０ｂは、第４電力線接続部１２０ｄにおいて第２中性線２２ｂに接続される。 FIG. 3B shows the configuration of the coupling device 100. As shown in FIG. This is shown to match FIG. 2(a). The first load 130a corresponds to the first transformer 14a in FIG. 3(a), and the second load 130b corresponds to the second transformer 14b in FIG. 3(a). The first signal line 60a is connected to the first low-voltage distribution line 20a at the first power line connection portion 120a. The first signal line 60a is passed through the through hole of the first inductive coupling portion 110a and through the through hole of the third inductive coupling portion 110c. Further, the first signal line 60a is connected to the third low-voltage distribution line 20c at the third power line connection portion 120c. On the other hand, the second signal line 60b is connected to the first neutral line 22a at the second power line connection portion 120b. The second signal line 60b is passed through the through hole of the second inductive coupling portion 110b and through the through hole of the fourth inductive coupling portion 110d. Further, the second signal line 60b is connected to the second neutral line 22b at the fourth power line connection portion 120d.

このような接続によって、第１低圧配電線２０ａと第１中性線２２ａとの組合せと、第３低圧配電線２０ｃと第２中性線２２ｂとの組合せの間における信号の伝送が可能になる。つまり、異なった変圧器１４をまたいだ信号の伝送が可能になる。このような構成は、通信装置２００が含まれない場合の構成であるといえる。 Such a connection allows the transmission of signals between the first low voltage distribution line 20a and first neutral 22a combination and the third low voltage distribution line 20c and second neutral 22b combination. . In other words, transmission of signals across different transformers 14 becomes possible. Such a configuration can be said to be a configuration in which the communication device 200 is not included.

本実施例によれば、電力線３０と信号線６０とに磁気的な結合を生じさせるともに、電力線３０に信号線６０を接続するので、負荷１３０のインピーダンスが小さい場合に、磁気的な結合によって電力線に信号を重畳できる。また、電力線３０と信号線６０とに磁気的な結合を生じさせるともに、電力線３０に信号線６０を接続するので、負荷１３０のインピーダンスが大きい場合に、信号線６０を介して電力線３０に信号を出力することによって電力線に信号を重畳できる。また、負荷１３０のインピーダンスが大きくても小さくても電力線に信号が重畳されるので、負荷１３０のインピーダンスによらず電力線に信号を重畳できる。また、電力線３０に信号線６０を接続するので、電力線３０のインピーダンスの影響を低減しながら、電力線３０に信号を効率的に注入できる。 According to this embodiment, magnetic coupling is generated between the power line 30 and the signal line 60, and the signal line 60 is connected to the power line 30. Therefore, when the impedance of the load 130 is small, the magnetic coupling causes the power line to signal can be superimposed on In addition, since the power line 30 and the signal line 60 are magnetically coupled to each other, and the signal line 60 is connected to the power line 30, when the load 130 has a large impedance, the signal is transmitted to the power line 30 via the signal line 60. By outputting, a signal can be superimposed on the power line. Moreover, since the signal is superimposed on the power line regardless of whether the impedance of the load 130 is large or small, the signal can be superimposed on the power line regardless of the impedance of the load 130 . In addition, since the signal line 60 is connected to the power line 30 , the signal can be efficiently injected into the power line 30 while reducing the influence of the impedance of the power line 30 .

また、信号線６０を介して通信装置２００に給電がなされるので、通信装置２００を動作させることができる。また、誘導結合部１１０と電力線接続部１２０との間との距離は、信号線６０において伝送される信号の最短波長の１／２以下にされるので、複数種類を経由した信号が位相の違いにより打ち消されることを防止できる。また、電力線接続部１２０は、誘導結合部１１０と負荷１３０の間に配置されるので、負荷１３０に流れる電流を誘導結合部１１０にも流すことにより、結合量を増加できる。また、結合量が増加するので、損失を減少できる。また、誘導結合部１１０から、電力線接続部１２０とは反対側に、通信装置２００の通信対象とする他の通信装置が配置されるので、負荷１３０に流れる電流を誘導結合部１１０にも流すことができる。また、負荷１３０に流れる電流を誘導結合部１１０にも流すので、結合量が増加し、損失を減少させることができる。また、誘導結合部１１０と負荷１３０との間に低インピーダンス素子が配置されるので、住宅分電盤５０に接続された家電機器などからのノイズを低減できる。また、誘導結合部１１０と負荷１３０との間に低インピーダンス素子が配置されるので、誘導結合部１１０の結合効率を向上できる。 Further, since power is supplied to the communication device 200 via the signal line 60, the communication device 200 can be operated. In addition, since the distance between the inductive coupling portion 110 and the power line connection portion 120 is set to 1/2 or less of the shortest wavelength of the signal transmitted on the signal line 60, the phases of the signals passing through a plurality of types are different from each other. can be prevented from being canceled by Moreover, since the power line connection portion 120 is arranged between the inductive coupling portion 110 and the load 130 , the amount of coupling can be increased by allowing the current flowing through the load 130 to also flow through the inductive coupling portion 110 . Also, since the amount of coupling increases, the loss can be reduced. Further, since another communication device to be communicated with by the communication device 200 is arranged on the opposite side of the power line connection portion 120 from the inductive coupling portion 110 , the current flowing through the load 130 can also flow through the inductive coupling portion 110 . can be done. Moreover, since the current flowing through the load 130 is also caused to flow through the inductive coupling portion 110, the amount of coupling increases and the loss can be reduced. In addition, since a low impedance element is arranged between inductive coupling section 110 and load 130, noise from household electrical appliances and the like connected to residential distribution board 50 can be reduced. Further, since a low impedance element is arranged between inductive coupling portion 110 and load 130, the coupling efficiency of inductive coupling portion 110 can be improved.

本開示の一態様の概要は、次の通りである。本開示のある態様の結合装置１００は、負荷１３０に電力を供給するための電力線３０と、通信装置２００との間で信号を伝送可能な信号線６０とに磁気的な結合を生じさせる誘導結合部１１０と、通信装置２００から誘導結合部１１０を経由して延びる信号線６０を電力線３０に接続する電力線接続部１２０と、を備える。 A summary of one aspect of the present disclosure is as follows. Coupling device 100 according to one aspect of the present disclosure performs inductive coupling to generate magnetic coupling between power line 30 for supplying power to load 130 and signal line 60 capable of transmitting signals between communication device 200 and communication device 200 . and a power line connection unit 120 that connects the signal line 60 extending from the communication device 200 via the inductive coupling unit 110 to the power line 30 .

電力線接続部１２０は、信号線６０を介して通信装置２００に給電してもよい。 The power line connection unit 120 may supply power to the communication device 200 via the signal line 60 .

誘導結合部１１０と電力線接続部１２０との間との距離は、信号線６０において伝送される信号の最短波長の１／２以下であってもよい。 The distance between the inductive coupling portion 110 and the power line connection portion 120 may be 1/2 or less of the shortest wavelength of the signal transmitted on the signal line 60 .

電力線３０は、第１電力線３０ａと第２電力線３０ｂとを含んでもよい。信号線６０は、第１信号線６０ａと第２信号線６０ｂとを含んでもよい。誘導結合部１１０は、第１電力線３０ａと第１信号線６０ａとに磁気的な結合を生じさせる第１誘導結合部１１０ａと、第２電力線３０ｂと第２信号線６０ｂとに磁気的な結合を生じさせる第２誘導結合部１１０ｂとを含んでもよい。電力線接続部１２０は、通信装置２００から第１誘導結合部１１０ａを経由して延びる第１信号線６０ａを第１電力線３０ａに接続する第１電力線接続部１２０ａと、通信装置２００から第２誘導結合部１１０ｂを経由して延びる第２信号線６０ｂを第２電力線３０ｂに接続する第２電力線接続部１２０ｂとを含んでもよい。 The power line 30 may include a first power line 30a and a second power line 30b. The signal line 60 may include a first signal line 60a and a second signal line 60b. The inductive coupling section 110 includes a first inductive coupling section 110a that causes magnetic coupling between the first power line 30a and the first signal line 60a, and magnetic coupling between the second power line 30b and the second signal line 60b. A second inductive coupling portion 110b may also be included. The power line connection unit 120 includes a first power line connection unit 120a that connects a first signal line 60a extending from the communication device 200 via a first inductive coupling unit 110a to the first power line 30a, and a second inductive coupling from the communication device 200. and a second power line connection portion 120b that connects the second signal line 60b extending through the portion 110b to the second power line 30b.

誘導結合部１１０から、電力線接続部１２０とは反対側に、通信装置２００の通信対象とする他の通信装置が配置されてもよい。 Another communication device to be communicated with by communication device 200 may be arranged on the opposite side of power line connection unit 120 from inductive coupling unit 110 .

誘導結合部１１０と負荷１３０との間に配置される低インピーダンス素子をさらに備えてもよい。 A low impedance element may be further provided between the inductive coupling portion 110 and the load 130 .

（実施例２）
次に、実施例２を説明する。実施例２は、実施例１と同様に電力線通信に使用される結合装置に関する。実施例１では、誘導結合部のコアに設けられた貫通孔に信号線が通されている。負荷が容量性である場合、誘導結合部と負荷によって共振回路が形成され、共振周波数においてインピーダンスが低くなる。共振周波数が信号の周波数帯域に含まれる場合、信号の減衰が発生する。実施例２は、負荷が容量性である場合に共振の影響を低減することを目的とする。実施例２に係る配電システム１０００は図１と同様のタイプである。ここでは、実施例１との差異を中心に説明する。 (Example 2)
Next, Example 2 will be described. Example 2, like Example 1, relates to a coupling device used for power line communication. In Example 1, the signal line is passed through the through hole provided in the core of the inductive coupling portion. If the load is capacitive, the inductive coupling and the load form a resonant circuit that has a low impedance at the resonant frequency. Attenuation of the signal occurs when the resonant frequency falls within the frequency band of the signal. Example 2 aims at reducing the effect of resonance when the load is capacitive. A power distribution system 1000 according to the second embodiment is of the same type as in FIG. Here, the description will focus on the differences from the first embodiment.

図４は、住宅分電盤５０の構成を示す。住宅分電盤５０は、図２（ａ）と同様に示されるが、負荷１３０は容量性であるとする。また、誘導結合部１１０のコア１１２における貫通孔と外縁部とに沿って、信号線６０がコア１１２に複数回巻き付けられる。信号線６０をコア１１２に複数回巻き付けられることによって、誘導結合部１１０のインダクタンスＬが大きくなる。誘導結合部１１０と負荷１３０が共振する場合の共振周波数は、インダクタンスＬが大きくなると小さくなる。信号の周波数帯域の下限よりも共振周波数が小さくなれば、共振の影響が小さくなる。そのため、信号の周波数帯域の下限よりも共振周波数が小さくなるように、信号線６０の巻数が決定される。 FIG. 4 shows the configuration of a residential distribution board 50. As shown in FIG. A residential distribution board 50 is shown similar to FIG. 2(a), but assume that the load 130 is capacitive. In addition, the signal line 60 is wound around the core 112 multiple times along the through hole and the outer edge of the core 112 of the inductive coupling portion 110 . By winding the signal line 60 around the core 112 multiple times, the inductance L of the inductive coupling portion 110 is increased. When the inductive coupling portion 110 and the load 130 resonate, the resonance frequency decreases as the inductance L increases. If the resonance frequency is lower than the lower limit of the frequency band of the signal, the influence of resonance is reduced. Therefore, the number of turns of the signal line 60 is determined so that the resonance frequency is lower than the lower limit of the frequency band of the signal.

本実施例によれば、コア１１２において、信号線６０が複数回巻き付けられるので、誘導結合部１１０のインダクタンスを大きくできる。また、誘導結合部１１０のインダクタンスが大きくなるので、共振周波数を通信帯域よりも低域側にシフトできる。また、共振周波数が通信帯域よりも低域側にシフトされるので、信号減衰の発生を抑制できる。 According to this embodiment, since the signal line 60 is wound multiple times around the core 112, the inductance of the inductive coupling portion 110 can be increased. Also, since the inductance of the inductive coupling section 110 is increased, the resonance frequency can be shifted to the lower side than the communication band. In addition, since the resonance frequency is shifted to the lower band side than the communication band, it is possible to suppress the occurrence of signal attenuation.

本開示の一態様の概要は、次の通りである。誘導結合部１１０は、磁性体のコア１１２を含んでもよい。コア１１２において、信号線６０が複数回巻き付けられてもよい。 A summary of one aspect of the present disclosure is as follows. The inductive coupling portion 110 may include a magnetic core 112 . The signal line 60 may be wound multiple times around the core 112 .

（実施例３）
次に、実施例３を説明する。実施例３は、これまでと同様に電力線通信に使用される結合装置に関する。しかしながら、実施例３では、これまでと比較して、信号線の配線が異なる。実施例３に係る配電システム１０００は図１と同様のタイプである。ここでは、これまでとの差異を中心に説明する。 (Example 3)
Next, Example 3 will be described. Example 3 relates to a coupling device used for power line communication as before. However, in the third embodiment, the wiring of the signal lines is different from that in the past. A power distribution system 1000 according to the third embodiment is of the same type as in FIG. Here we will focus on the differences.

図５は、住宅分電盤５０の構成を示す。住宅分電盤５０は、図２（ａ）と同様に示されるが、前述のごとく、信号線６０の配線が異なる。第１誘導結合部１１０ａの貫通孔には、第１電力線３０ａと第１信号線６０ａが通され、第２誘導結合部１１０ｂの貫通孔には、第２電力線３０ｂと第２信号線６０ｂが通される。第１誘導結合部１１０ａは、第１電力線３０ａと第１信号線６０ａとに磁気的な結合を生じさせ、第２誘導結合部１１０ｂは、第２電力線３０ｂと第２信号線６０ｂとに磁気的な結合を生じさせる。 FIG. 5 shows the configuration of a residential distribution board 50. As shown in FIG. The residential distribution board 50 is shown in the same manner as in FIG. 2(a), but the wiring of the signal line 60 is different as described above. A first power line 30a and a first signal line 60a pass through the through hole of the first inductive coupling portion 110a, and a second power line 30b and a second signal line 60b pass through the through hole of the second inductive coupling portion 110b. be done. The first inductive coupling portion 110a magnetically couples the first power line 30a and the first signal line 60a, and the second inductive coupling portion 110b magnetically couples the second power line 30b and the second signal line 60b. bond.

第１電力線接続部１２０ａの一端側には、第１電力線３０ａと第２信号線６０ｂとが接続される。つまり、第１電力線接続部１２０ａは、一端側において、第１電力線３０ａに第２信号線６０ｂを電気的に接続する。また、第１電力線接続部１２０ａの他端側には、負荷１３０が電気的に接続される。一方、第２電力線接続部１２０ｂの一端側には、第２電力線３０ｂと第１信号線６０ａとが接続される。つまり、第２電力線接続部１２０ｂは、一端側において、第２電力線３０ｂに第１信号線６０ａを電気的に接続する。また、第２電力線接続部１２０ｂの他端側には、負荷１３０が電気的に接続される。 The first power line 30a and the second signal line 60b are connected to one end side of the first power line connection portion 120a. That is, the first power line connecting portion 120a electrically connects the second signal line 60b to the first power line 30a at one end side. A load 130 is electrically connected to the other end of the first power line connection portion 120a. On the other hand, the second power line 30b and the first signal line 60a are connected to one end side of the second power line connection portion 120b. That is, the second power line connecting portion 120b electrically connects the first signal line 60a to the second power line 30b at one end side. A load 130 is electrically connected to the other end of the second power line connection portion 120b.

本実施例によれば、第１電力線接続部１２０ａは第１電力線３０ａに第２信号線６０ｂを接続し、第２電力線接続部１２０ｂは第２電力線３０ｂに第１信号線６０ａを接続するので、インダクタンスによる位相の進みとキャパシタンスによる位相の遅れを調整できる。また、インダクタンスによる位相の進みとキャパシタンスによる位相の遅れが調整されるので、通信帯域における信号減衰の発生を抑制できる。 According to this embodiment, the first power line connection unit 120a connects the first power line 30a to the second signal line 60b, and the second power line connection unit 120b connects the second power line 30b to the first signal line 60a. Phase lead by inductance and phase lag by capacitance can be adjusted. In addition, since the phase advance due to the inductance and the phase delay due to the capacitance are adjusted, the occurrence of signal attenuation in the communication band can be suppressed.

本開示の一態様の概要は、次の通りである。電力線３０は、第１電力線３０ａと第２電力線３０ｂとを含んでもよい。信号線６０は、第１信号線６０ａと第２信号線６０ｂとを含んでもよい。誘導結合部１１０は、第１電力線３０ａと第１信号線６０ａとに磁気的な結合を生じさせる第１誘導結合部１１０ａと、第２電力線３０ｂと第２信号線６０ｂとに磁気的な結合を生じさせる第２誘導結合部１１０ｂとを含んでもよい。電力線接続部１２０は、通信装置２００から第２誘導結合部１１０ｂを経由して延びる第２信号線６０ｂを第１電力線３０ａに接続する第１電力線接続部１２０ａと、通信装置２００から第１誘導結合部１１０ａを経由して延びる第１信号線６０ａを第２電力線３０ｂに接続する第２電力線接続部１２０ｂとを含んでもよい。 A summary of one aspect of the present disclosure is as follows. The power line 30 may include a first power line 30a and a second power line 30b. The signal line 60 may include a first signal line 60a and a second signal line 60b. The inductive coupling section 110 includes a first inductive coupling section 110a that causes magnetic coupling between the first power line 30a and the first signal line 60a, and magnetic coupling between the second power line 30b and the second signal line 60b. A second inductive coupling portion 110b may also be included. The power line connection unit 120 includes a first power line connection unit 120a that connects a second signal line 60b extending from the communication device 200 via a second inductive coupling unit 110b to the first power line 30a, and a second power line connection portion 120b that connects the first signal line 60a extending via the portion 110a to the second power line 30b.

以上、本開示を実施例をもとに説明した。この実施例は例示であり、それらの各構成要素あるいは各処理プロセスの組合せにいろいろな変形例が可能なこと、またそうした変形例も本開示の範囲にあることは当業者に理解されるところである。 The present disclosure has been described above based on the embodiments. It should be understood by those skilled in the art that this embodiment is an example, and that various modifications are possible in the combination of each component or each treatment process, and such modifications are within the scope of the present disclosure. .

実施例１から３において、電力線３０には負荷１３０が接続される。しかしながらこれに限らず例えば、分電盤の１つの分岐ブレーカに電力線３０が接続されてもよい。その際、負荷１３０がなくてもよい。本変形例によれば、実施例の適用範囲を拡大できる。 In Examples 1 to 3, a load 130 is connected to the power line 30 . However, for example, the power line 30 may be connected to one branch breaker of the distribution board without being limited to this. At that time, the load 130 may be absent. According to this modification, the scope of application of the embodiment can be expanded.

１０ 高圧配電線、 １２ 分岐配電線、 １４ 変圧器、 １６ １次コイル、 １８ ２次コイル、 ２０ 低圧配電線、 ２２ 中性線、 ２４ 接地線、 ２６ 主幹ブレーカ、 ３０ 電力線、 ５０ 住宅分電盤、 ６０ 信号線、 １００ 結合装置、 １１０ 誘導結合部、 １１２ コア、 １２０ 電力線接続部、 １３０ 負荷、 ２００ 通信装置、 １０００ 配電システム。 10 High-voltage distribution line 12 Branch distribution line 14 Transformer 16 Primary coil 18 Secondary coil 20 Low-voltage distribution line 22 Neutral line 24 Grounding wire 26 Main breaker 30 Power line 50 Residential distribution board , 60 signal line, 100 coupling device, 110 inductive coupling, 112 core, 120 power line connection, 130 load, 200 communication device, 1000 power distribution system.

Claims (8)

負荷に電力を供給するための電力線と、通信装置との間で信号を伝送可能な信号線とに磁気的な結合を生じさせる誘導結合部と、
前記通信装置から前記誘導結合部を経由して延びる前記信号線を前記電力線に接続する電力線接続部と、
を備え、
前記通信装置からの前記信号線は、前記誘導結合部の一端側に延びるとともに、前記誘導結合部の他端側から前記電力線接続部に延びて、前記電力線接続部において終端されることを特徴とする結合装置。 an inductive coupling unit for generating magnetic coupling between a power line for supplying power to a load and a signal line capable of transmitting signals between a communication device;
a power line connection unit that connects the signal line extending from the communication device via the inductive coupling unit to the power line;
with
The signal line from the communication device extends to one end side of the inductive coupling portion, extends from the other end side of the inductive coupling portion to the power line connection portion, and is terminated at the power line connection portion. binding device. 前記電力線接続部は、前記信号線を介して前記通信装置に給電することを特徴とする請求項１に記載の結合装置。 2. The coupling device according to claim 1, wherein the power line connection unit supplies power to the communication device through the signal line. 前記誘導結合部と前記電力線接続部との間との距離は、前記信号線において伝送される信号の最短波長の１／２以下であることを特徴とする請求項１または２に記載の結合装置。 3. The coupling device according to claim 1, wherein the distance between said inductive coupling portion and said power line connection portion is 1/2 or less of the shortest wavelength of a signal transmitted on said signal line. . 前記誘導結合部は、磁性体のコアを含み、
前記コアにおいて、前記信号線が複数回巻き付けられることを特徴とする請求項１から３のいずれか１項に記載の結合装置。 The inductive coupling portion includes a magnetic core,
4. The coupling device according to any one of claims 1 to 3, wherein the signal line is wound multiple times around the core. 前記電力線は、第１電力線と第２電力線とを含み、
前記信号線は、第１信号線と第２信号線とを含み、
前記誘導結合部は、前記第１電力線と前記第１信号線とに磁気的な結合を生じさせる第１誘導結合部と、前記第２電力線と前記第２信号線とに磁気的な結合を生じさせる第２誘導結合部とを含み、
前記電力線接続部は、前記通信装置から前記第１誘導結合部を経由して延びる前記第１信号線を前記第１電力線に接続する第１電力線接続部と、前記通信装置から前記第２誘導結合部を経由して延びる前記第２信号線を前記第２電力線に接続する第２電力線接続部とを含み、
前記通信装置からの前記第１信号線は、前記第１電力線接続部において終端され、
前記通信装置からの前記第２信号線は、前記第２電力線接続部において終端されることを特徴とする請求項１から４のいずれか１項に記載の結合装置。 The power line includes a first power line and a second power line,
the signal line includes a first signal line and a second signal line;
The inductive coupling section produces a first inductive coupling section that produces magnetic coupling between the first power line and the first signal line, and a magnetic coupling section that produces magnetic coupling between the second power line and the second signal line. and a second inductive coupling that causes
The power line connecting portion includes a first power line connecting portion connecting the first signal line extending from the communication device via the first inductive coupling portion to the first power line, and a second inductive coupling from the communication device. a second power line connecting portion that connects the second signal line extending through the portion to the second power line;
the first signal line from the communication device is terminated at the first power line connecting portion;
5. The coupling device according to any one of claims 1 to 4, wherein the second signal line from the communication device is terminated at the second power line connection section. 前記電力線は、第１電力線と第２電力線とを含み、
前記信号線は、第１信号線と第２信号線とを含み、
前記誘導結合部は、前記第１電力線と前記第１信号線とに磁気的な結合を生じさせる第１誘導結合部と、前記第２電力線と前記第２信号線とに磁気的な結合を生じさせる第２誘導結合部とを含み、
前記電力線接続部は、前記通信装置から前記第２誘導結合部を経由して延びる前記第２信号線を前記第１電力線に接続する第１電力線接続部と、前記通信装置から前記第１誘導結合部を経由して延びる前記第１信号線を前記第２電力線に接続する第２電力線接続部とを含み、
前記通信装置からの前記第１信号線は、前記第２電力線接続部において終端され、
前記通信装置からの前記第２信号線は、前記第１電力線接続部において終端されることを特徴とする請求項１から４のいずれか１項に記載の結合装置。 The power line includes a first power line and a second power line,
The signal line includes a first signal line and a second signal line,
The inductive coupling section produces a first inductive coupling section that produces magnetic coupling between the first power line and the first signal line, and a magnetic coupling section that produces magnetic coupling between the second power line and the second signal line. and a second inductive coupling that causes
The power line connection section includes a first power line connection section that connects the second signal line extending from the communication device via the second inductive coupling section to the first power line, and a first power line connection section that connects the first power line from the communication device to the first inductive coupling. a second power line connecting portion that connects the first signal line extending through the portion to the second power line;
the first signal line from the communication device is terminated at the second power line connection section;
5. The coupling device according to any one of claims 1 to 4, wherein the second signal line from the communication device is terminated at the first power line connection section. 前記誘導結合部から、前記電力線接続部とは反対側に、前記通信装置の通信対象とする他の通信装置が配置されることを特徴とする請求項１から６のいずれか１項に記載の結合装置。 7. The communication device according to any one of claims 1 to 6, wherein another communication device to be communicated with by the communication device is arranged on the side opposite to the power line connection portion from the inductive coupling portion. binding device. 前記誘導結合部と前記負荷との間に配置される低インピーダンス素子をさらに備えることを特徴とする請求項１から７のいずれか１項に記載の結合装置。 8. A coupling device as claimed in any preceding claim, further comprising a low impedance element positioned between the inductive coupling portion and the load.
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