JPS6260857B2 - - Google Patents
Info
- Publication number
- JPS6260857B2 JPS6260857B2 JP6823583A JP6823583A JPS6260857B2 JP S6260857 B2 JPS6260857 B2 JP S6260857B2 JP 6823583 A JP6823583 A JP 6823583A JP 6823583 A JP6823583 A JP 6823583A JP S6260857 B2 JPS6260857 B2 JP S6260857B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- power
- transmitter
- transformer
- distribution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000008054 signal transmission Effects 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
-
- 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
Description
本発明は信号の伝送路として単相３線式結線の
配電線を利用して各種計測信号又は状態監視信号
等の伝送を行なう際の信号伝送方式に関するもの
である。
第１図は従来公知の単相３線式結線の配電線を
利用した信号伝送方式の１例を示すものであり、
第１図に於て、１は電力の配電側に設置される伝
送信号の送信機、２は電力の受電側に設置される
伝送信号の受信機、３及び４は受電によつて動作
する、例えばモーターの如き電力負荷、５及び６
は接地されていない配電線、７は接地された配電
線、Ｔ０は電力中継用トランス、Ｐ１，Ｐ２は電
力会社又は自家発電装置等からの電力受電端子、
Ｐ３，Ｐ４及びＰ５は電力負荷３，４側への配電
端子、Ｐ６，Ｐ７は電力負荷３側の受電端子、Ｐ
８，Ｐ９は電力負荷４側の受電端子を示す。
また送信機１に於て、Ｐ１０は信号の対地信号
送出端子、Ｔ１は信号の中継トランス、Ｃ０はコ
ンデンサであり、受信機２に於て、Ｐ１１は信号
の対地信号受信端子、Ｔ２は信号の中継トラン
ス、Ｃ１はコンデンサである。
尚、各トランスＴ０，Ｔ１及びＴ２に於て、Ｐ
は１次側巻線を、Ｓは２次側巻線をそれぞれ示し
ている。また、電力中継用トランスＴ０の２次側
巻線Ｓに於て、配電端子Ｐ３，Ｐ４間に接続され
る巻線のインダクタンスと配電端子Ｐ５，Ｐ４間
に接続される巻線のインダクタンスは等しく設定
されている。
電力負荷３又は４を動作させるための電力は電
力会社等から受電端子Ｐ１，Ｐ２に供給され、ト
ランスＴ０で中継されて配電線５−７間又は６−
７間を介して当該電力負荷３又は４に供給され
る。また送信機１から送出された信号は配電線５
又は６の一方（第１図は配電線６を使用した例を
示す。）を経由して接地した配電線７を帰路とす
る対地帰路方式で受信機２に伝送される。即ち、
以下の経路による。
The present invention relates to a signal transmission system for transmitting various measurement signals, condition monitoring signals, etc. using a single-phase three-wire power distribution line as a signal transmission path. Figure 1 shows an example of a signal transmission system using a conventionally known single-phase three-wire distribution line.
In FIG. 1, 1 is a transmission signal transmitter installed on the power distribution side, 2 is a transmission signal receiver installed on the power reception side, and 3 and 4 are operated by receiving power. Power loads such as motors, 5 and 6
is an ungrounded distribution line, 7 is a grounded distribution line, T0 is a power relay transformer, P1 and P2 are power receiving terminals from a power company or a private power generator, etc.
P3, P4 and P5 are power distribution terminals for the power loads 3 and 4, P6 and P7 are power receiving terminals for the power load 3, and P
8, P9 indicates a power receiving terminal on the power load 4 side. In the transmitter 1, P10 is a signal ground signal sending terminal, T1 is a signal relay transformer, and C0 is a capacitor. In the receiver 2, P11 is a signal ground signal receiving terminal, and T2 is a signal ground signal receiving terminal. The relay transformer C1 is a capacitor. In addition, in each transformer T0, T1 and T2, P
indicates the primary winding, and S indicates the secondary winding. In the secondary winding S of the power relay transformer T0, the inductance of the winding connected between the power distribution terminals P3 and P4 and the inductance of the winding connected between the power distribution terminals P5 and P4 are set to be equal. has been done. Electric power for operating the power load 3 or 4 is supplied from the electric power company etc. to the power receiving terminals P1 and P2, relayed by the transformer T0, and transmitted between the power distribution lines 5-7 or 6-
The power is supplied to the power load 3 or 4 through the power supply line 7. In addition, the signal sent from the transmitter 1 is transmitted to the power distribution line 5.
or 6 (FIG. 1 shows an example using the power distribution line 6), and is transmitted to the receiver 2 using a ground return method using the grounded power distribution line 7 as the return route. That is,
By the following route.
【表】
また、送信機１からの送出信号は同時に次の経
路、即ち
信号送出端子Ｐ１０−トランスＴ１（Ｐ−Ｓ）
−コンデンサＣ０−配電端子Ｐ５−トランスＴ０
（Ｓ）−配電端子Ｐ４−大地
によつてトランスＴ０の２次側巻線Ｓに印加さ
れ、当該トランスＴ０の２次側巻線Ｓに上記送出
信号による電流が流れて上記トランスＴ０の１次
側巻線Ｐに電圧が誘起され、受電端子Ｐ１，Ｐ２
間に於ける雑音信号となる。即ち、送信機１から
の送出信号が電力中継用トランスＴ０の１次側巻
線Ｐに漏洩し、電力会社等から電力を供給するた
めの電力線（受電端子Ｐ１，Ｐ２に接続されてい
る。）を介して他の電力設備への雑音信号となり
悪影響を与える。このため電力中継用トランスＴ
０の１次側巻線Ｐで送信機１からの送出信号によ
る漏洩出力レベルが許容範囲内になるように上記
送信機１からの送出信号の出力レベルを小さく抑
制している。しかしながら、例えば送信機１と受
信機２との間の伝送経路が長くなつた場合、即ち
伝送経路の抵抗値が大きい場合などでは、上記送
信機１からの送出信号出力レベルがあまり小さい
と、上記送信機１からの送出信号を上記受信機２
で正常に受信出来なくなる欠点を有している。
本発明は上記欠点を除く信号伝送方式を簡単な
手段で提供するものである。
第２図は本発明の実施例の回路図を示し、図中
第１図と異なる所は送信機１のトランスＴ１の２
次側巻線Ｓと、信号伝送路となる配電線６とは異
なるもう一方の配電線５との間にコンデンサＣ２
が追加接続されていて、送信機１からの送出信号
は双方のコンデンサＣ０及びＣ２を介して配電線
５及び６（単相３線式結線の接地されていない双
方の配電線）に同じ位相で送出されていることで
ある。
送信機１から受信機２への信号の伝送は、前記
従来例と同様に接地されていない配電線６を伝送
路とする対地帰路方式で行なわれるが、電力中継
用トランスＴ０の２次側巻線Ｓに当該信号が印加
される状態が前記従来例とは異なる。即ち、送信
機１から送出された信号は、次の２つの経路、
信号送出端子Ｐ−トランスＴ１（Ｐ−Ｓ）−コ
ンデンサＣ０−配電端子Ｐ５−トランスＴ０
（Ｓ）−配電端子Ｐ４−大地
信号送出端子Ｐ１０−トランスＴ１（Ｐ−Ｓ）
−コンデンサＣ２−配電端子Ｐ３−トランスＴ０
（Ｓ）−配電端子Ｐ４−大地
に流れ、電力中継用トランスＴ０の２次側巻線Ｓ
に流れる信号電流で、配電端子Ｐ５からＰ４に流
れる電流と、配電端子Ｐ３からＰ４に流れる電流
とは位相が互に逆となる。
従つて接地されていない２本の配電線５及び６
に送信機１からの送出信号が同相、かつ等電流値
で印加されるようにコンデンサＣ０，Ｃ２の値を
設定することにより、電力中継用トランスＴ０の
２次側巻線Ｓの２つの巻線に流れる電流の方向が
逆となるため当該電力中継用トランスＴ０の１次
側巻線Ｐには送信機１からの信号による電圧が誘
起されない。即ち、送信機１からの送出信号が電
力中継用トランスＴ０の１次側巻線Ｐに漏洩しな
い。従つて送信機１の送出信号出力レベルを任意
に設定出来るため、上記送信機１と受信機２との
間の伝送経路が長くなつた場合、即ち伝送経路の
抵抗値が大きな場合においても上記送信機１の送
出信号出力レベルを大きく設定することにより上
記送信機１からの送出信号が上記受信機２で正常
に受信出来る。[Table] Also, the sending signal from transmitter 1 is simultaneously routed through the following route: Signal sending terminal P10 - Transformer T1 (P-S)
- Capacitor C0 - Distribution terminal P5 - Transformer T0
(S) - Power distribution terminal P4 - Applied to the secondary winding S of the transformer T0 by the ground, the current according to the above sending signal flows through the secondary winding S of the transformer T0, and the primary of the transformer T0 A voltage is induced in the side winding P, and the power receiving terminals P1 and P2
It becomes a noise signal in between. That is, the transmission signal from the transmitter 1 leaks to the primary winding P of the power relay transformer T0, and the power line (connected to the power receiving terminals P1 and P2) for supplying power from the power company etc. It becomes a noise signal to other power equipment through the power supply and has an adverse effect. Therefore, the power relay transformer T
The output level of the signal sent out from the transmitter 1 is suppressed to a low level so that the leakage output level due to the signal sent out from the transmitter 1 is within an allowable range in the primary winding P of 0. However, when the transmission path between the transmitter 1 and the receiver 2 becomes long, that is, when the resistance value of the transmission path is large, if the output level of the output signal from the transmitter 1 is too low, the The transmission signal from the transmitter 1 is transmitted to the receiver 2.
It has the disadvantage that it cannot be received normally. The present invention provides a signal transmission system that eliminates the above-mentioned drawbacks using simple means. FIG. 2 shows a circuit diagram of an embodiment of the present invention, and the difference from FIG.
A capacitor C2 is connected between the next winding S and the other distribution line 5, which is different from the distribution line 6 serving as the signal transmission path.
is additionally connected, and the output signal from transmitter 1 is sent through both capacitors C0 and C2 to distribution lines 5 and 6 (both distribution lines that are not grounded in a single-phase 3-wire connection) with the same phase. It is being sent out. The transmission of the signal from the transmitter 1 to the receiver 2 is performed by the return-to-ground method using the ungrounded distribution line 6 as the transmission path, as in the conventional example, but the secondary winding of the power relay transformer T0 is The state in which the signal is applied to the line S is different from the conventional example. That is, the signal sent from the transmitter 1 goes through the following two paths: Signal sending terminal P - Transformer T1 (P-S) - Capacitor C0 - Distribution terminal P5 - Transformer T0
(S) - Distribution terminal P4 - Ground Signal sending terminal P10 - Transformer T1 (P-S)
- Capacitor C2 - Distribution terminal P3 - Transformer T0
(S) - Power distribution terminal P4 - Flows to ground, secondary winding S of power relay transformer T0
The signal current flowing from the power distribution terminals P5 to P4 and the current flowing from the power distribution terminals P3 to P4 have opposite phases. The two distribution lines 5 and 6 are therefore not grounded.
By setting the values of capacitors C0 and C2 so that the sending signal from transmitter 1 is applied in the same phase and with equal current value, the two windings of the secondary winding S of the power relay transformer T0 Since the direction of the current flowing in is reversed, no voltage is induced in the primary winding P of the power relay transformer T0 by the signal from the transmitter 1. That is, the transmission signal from the transmitter 1 does not leak to the primary winding P of the power relay transformer T0. Therefore, since the output signal output level of the transmitter 1 can be set arbitrarily, even when the transmission path between the transmitter 1 and the receiver 2 becomes long, that is, when the resistance value of the transmission path is large, the transmission is still possible. By setting the transmitting signal output level of the transmitter 1 to be high, the transmitting signal from the transmitter 1 can be normally received by the receiver 2.
第１図は従来の信号伝送方式を示した回路図、
第２図は本発明の実施例に係る信号伝送方式を示
した回路図を示す。
１……送信機、２……受信機、３，４……配電
線の負荷、５，６……配電線、Ｔ０……電力中継
トランス、Ｔ１……信号の送信中継トランス、Ｔ
２……信号の受信中継トランス、Ｃ０，Ｃ１，Ｃ
２……コンデンサ。
Figure 1 is a circuit diagram showing a conventional signal transmission system.
FIG. 2 shows a circuit diagram showing a signal transmission system according to an embodiment of the present invention. 1... Transmitter, 2... Receiver, 3, 4... Distribution line load, 5, 6... Distribution line, T0... Power relay transformer, T1... Signal transmission relay transformer, T
2...Signal reception relay transformer, C0, C1, C
2... Capacitor.
Claims (1)
方式に於て、送信側の信号出力線と接地されてい
ない２本の配電線との間、及び受信側の信号入力
線と上記接地されていない配電線のいずれか一方
との間を各々コンデンサで結合し、受信側でコン
デンサが結合された上記一方の配電線と対地間と
で信号の伝送路を構成し、上記送信側の接地され
ていない２本の配電線には同じ位相で送信すべき
信号が印加されるようにしたことを特徴とする配
電線を利用した信号伝送方式。1. In a signal transmission system using a single-phase three-wire distribution line, the connection between the signal output line on the transmitting side and two ungrounded distribution lines, and between the signal input line on the receiving side and the ground A signal transmission path is formed between one of the distribution lines connected to the capacitor and the ground on the receiving side, and the transmission line is connected to the ground on the sending side. A signal transmission method using distribution lines characterized in that signals to be transmitted are applied in the same phase to two distribution lines that are not connected to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6823583A JPS59193638A (en) | 1983-04-18 | 1983-04-18 | Signal transmission system utilizing distribution line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6823583A JPS59193638A (en) | 1983-04-18 | 1983-04-18 | Signal transmission system utilizing distribution line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59193638A JPS59193638A (en) | 1984-11-02 |
| JPS6260857B2 true JPS6260857B2 (en) | 1987-12-18 |
Family
ID=13367919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6823583A Granted JPS59193638A (en) | 1983-04-18 | 1983-04-18 | Signal transmission system utilizing distribution line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59193638A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0417168Y2 (en) * | 1987-05-09 | 1992-04-16 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5219469B2 (en) * | 2007-11-16 | 2013-06-26 | ローム株式会社 | Electrical equipment and power line communication system |
| JP2011130124A (en) * | 2009-12-16 | 2011-06-30 | Canon Inc | Image forming apparatus |
-
1983
- 1983-04-18 JP JP6823583A patent/JPS59193638A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0417168Y2 (en) * | 1987-05-09 | 1992-04-16 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59193638A (en) | 1984-11-02 |
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