JP2871953B2 - Switching regulator with coaxial cable connection protection function - Google Patents
Switching regulator with coaxial cable connection protection functionInfo
- Publication number
- JP2871953B2 JP2871953B2 JP16323092A JP16323092A JP2871953B2 JP 2871953 B2 JP2871953 B2 JP 2871953B2 JP 16323092 A JP16323092 A JP 16323092A JP 16323092 A JP16323092 A JP 16323092A JP 2871953 B2 JP2871953 B2 JP 2871953B2
- Authority
- JP
- Japan
- Prior art keywords
- coaxial cable
- switching regulator
- protection function
- output voltage
- cable connection
- 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 - Lifetime
Links
Landscapes
- Protection Of Static Devices (AREA)
- Dc-Dc Converters (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は同軸ケーブル接続保護機
能付スイッチングレギュレータに関し、特に同軸ケーブ
ルを利用した信号ラインにスイッチングレギュレータの
直流電圧を重畳して電力を送出する場合に、同軸ケーブ
ルを脱着する際の短絡事故や感電事故を防止する同軸ケ
ーブル接続保護機能を付加した同軸ケーブル接続保護機
能付スイッチングレギュレータに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching regulator having a coaxial cable connection protection function, and more particularly, to detaching a coaxial cable when power is transmitted by superimposing a DC voltage of the switching regulator on a signal line using the coaxial cable. The present invention relates to a switching regulator with a coaxial cable connection protection function added with a coaxial cable connection protection function for preventing a short circuit accident or an electric shock accident at the time.
【０００２】[0002]
【従来の技術】従来、スイッチングレギュレータから信
号ラインとする同軸ケーブルに重畳して電力を供給する
方式は、図４に示すものが一般的である。2. Description of the Related Art Conventionally, a method of supplying electric power from a switching regulator to a coaxial cable serving as a signal line is generally shown in FIG.
【０００３】すなわち、電力供給側１において、信号ラ
イン３にスイッチングレギュレータ１８から電源ライン
７を介して電圧を重畳し、それを同軸ケーブル５に重畳
して電力消費側２に送る。That is, on the power supply side 1, a voltage is superimposed on the signal line 3 from the switching regulator 18 via the power supply line 7, and the voltage is superimposed on the coaxial cable 5 and sent to the power consumption side 2.
【０００４】電力消費側２では、交流成分を信号ライン
４に、直流成分を電源ライン８に分離して、電力を供給
する構成であった。On the power consuming side 2, an AC component is supplied to the signal line 4 and a DC component is supplied to the power supply line 8 to supply power.
【０００５】スイッチングレギュレータ６は、図５に示
すように、１次側にＰＷＭ（Ｐｕｌｓｅ Ｗｉｄｔｈ
Ｍｏｄｕｌａｔｉｏｎ）制御回路１７と、スイッチング
素子９とを用い、トランス１０で変圧したその２次側出
力を整流ダイオード１１で整流し、かつチョークコイル
１２と平滑用フィルタ１３を通して平滑化出力する。さ
らに、出力電圧安定化回路１５によって出力端の電圧を
検出し、ＰＷＭ制御回路１７を制御して出力安定化を図
る構成となっていた。As shown in FIG. 5, the switching regulator 6 has a PWM (Pulse Width) on its primary side.
Using the modulation control circuit 17 and the switching element 9, the secondary output transformed by the transformer 10 is rectified by the rectifier diode 11, and is smoothed and output through the choke coil 12 and the smoothing filter 13. Further, the output voltage stabilizing circuit 15 detects the voltage at the output terminal, and controls the PWM control circuit 17 to stabilize the output.
【０００６】[0006]
【発明が解決しようとする課題】上述した従来のスイッ
チングレギュレータでは、同軸ケーブルの脱着作業時
に、作業ミスまたはコネクタ不良などにより、感電事故
や、短絡事故の発生が避けられないという問題点があっ
た。The above-mentioned conventional switching regulator has a problem that an electric shock accident or a short circuit accident is unavoidable due to a work error or a defective connector when the coaxial cable is connected or detached. .
【０００７】本発明の目的は上述した問題点を解決し、
同軸ケーブルの脱着作業時に、感電事故や短絡事故の発
生を回避しうる同軸ケーブル接続保護機能付スイッチン
グレギュレータを提供することにある。An object of the present invention is to solve the above-mentioned problems,
It is an object of the present invention to provide a switching regulator with a coaxial cable connection protection function capable of avoiding an electric shock accident or a short circuit accident at the time of attaching and detaching a coaxial cable.
【０００８】[0008]
【課題を解決するための手段】本発明のスイッチングレ
ギュレータは、信号電圧を送出する同軸ケーブルに重畳
して電力を送出すべく直流出力電圧を電力供給側から電
力負荷側に送出する場合に、前記同軸ケーブル脱着時の
短絡および感電事故を抑止する保護機能を付加した同軸
ケーブル接続保護機能付スイッチングレギュレータであ
って、出力電圧を可変とする制御を前記同軸ケーブルの
脱着情報に追随して行なう出力電圧可変回路と、前記同
軸ケーブルの脱着状態に対応した負荷電流の無および有
の状態を検出して前記出力電圧可変回路に前記脱着情報
を供給する同軸ケーブル接続検出回路とを備える構成を
有する。SUMMARY OF THE INVENTION A switching regulator according to the present invention is adapted to transmit a DC output voltage from a power supply side to a power load side in order to transmit power by superimposing the signal voltage on a coaxial cable. What is claimed is: 1. A switching regulator with a protection function for coaxial cable connection protection, to which a protection function for suppressing a short circuit and an electric shock accident when a coaxial cable is connected / disconnected is provided. A variable circuit; and a coaxial cable connection detection circuit that detects absence and presence of a load current corresponding to the connection / disconnection state of the coaxial cable and supplies the connection / disconnection information to the output voltage variable circuit.
【０００９】[0009]
【実施例】次に、本発明について図面を参照して説明す
る。Next, the present invention will be described with reference to the drawings.
【００１０】図１は本発明の一実施例の全体構成を示す
ブロック図、図２は図１のスイッチングレギュレータ６
の構成を示すブロック図である。FIG. 1 is a block diagram showing the overall configuration of an embodiment of the present invention, and FIG. 2 is a switching regulator 6 shown in FIG.
FIG. 3 is a block diagram showing the configuration of FIG.
【００１１】図１に示す実施例の構成としては、電力供
給側１Ａにおいて、信号ライン３に接続した同軸ケーブ
ル接続保護機能付スイッチングレギュレータ６から電源
ライン７を通って信号ラインに直流電圧を重畳し、同軸
ケーブル５を介して電力消費側２に電力を送り、電力消
費側２では、交流成分を信号ライン４に、また直流成分
を電源ライン８に分離して電力を供給することを可能と
した構成である。In the embodiment shown in FIG. 1, a DC voltage is superimposed on a signal line through a power supply line 7 from a switching regulator 6 having a coaxial cable connection protection function connected to a signal line 3 on a power supply side 1A. The power is transmitted to the power consuming side 2 via the coaxial cable 5, and the power consuming side 2 can supply the power by separating the AC component to the signal line 4 and the DC component to the power supply line 8. Configuration.
【００１２】次に、図２によって、同軸ケーブル接続保
護機能付スイッチングレギュレータ６の構成を説明す
る。Next, the configuration of the switching regulator 6 with a coaxial cable connection protection function will be described with reference to FIG.
【００１３】この同軸ケーブル接続保護機能付スイッチ
ングレギュレータ６は、内部に出力電圧可変回路１６
と、同軸ケーブル接続検出回路１４を備えた点が図２の
従来のスイッチングレギュレータ１８と異り、他は従来
のスイッチングレギュレータとほぼ同一の構成である。The switching regulator 6 with a coaxial cable connection protection function has an output voltage variable circuit 16 therein.
The difference from the conventional switching regulator 18 of FIG. 2 in that the switching regulator 18 and the conventional switching regulator 18 of FIG. 2 are provided is substantially the same as the conventional switching regulator.
【００１４】次に、図２のスイッチングレギュレータの
動作について説明する。Next, the operation of the switching regulator of FIG. 2 will be described.
【００１５】同軸ケーブル５が電力消費側２に未接続の
場合は、同軸ケーブル接続信号検出回路１４にて、電力
消費側２に電流が流れていないことを検出し、検出信号
を出力電圧可変回路１６に送出する。When the coaxial cable 5 is not connected to the power consuming side 2, the coaxial cable connection signal detecting circuit 14 detects that no current flows to the power consuming side 2 and outputs a detection signal to the output voltage variable circuit. To 16.
【００１６】検出信号が無い場合、出力電圧安定化回路
１５の内部に配置したオペアンプの基準電圧を下げ、出
力電圧を低電圧レベルで安定化させる。When there is no detection signal, the reference voltage of the operational amplifier disposed inside the output voltage stabilizing circuit 15 is lowered, and the output voltage is stabilized at a low voltage level.
【００１７】次に、同軸ケーブル５が電力消費側２に接
続された場合は、同軸ケーブル接続検出回路１４にて、
電力消費側２に電流が流れていることを検出し検出信号
を出力電圧可変回路１６に送出し、出力安定化回路１５
内蔵のオペアンプの基準電圧を上げ、出力電圧を電力消
費側２で必要とする高電圧まで上昇させ、安定化した電
圧として出力する。このようにしてケーブルを接続する
際の短絡事故や感電事故を確実に防止することができ
る。Next, when the coaxial cable 5 is connected to the power consuming side 2, the coaxial cable connection detecting circuit 14
It detects that a current is flowing to the power consuming side 2 and sends a detection signal to the output voltage variable circuit 16, and the output stabilization circuit 15
The reference voltage of the built-in operational amplifier is increased, and the output voltage is increased to a high voltage required on the power consumption side 2 and output as a stabilized voltage. In this manner, a short circuit accident and an electric shock accident when connecting the cable can be reliably prevented.
【００１８】図３は、図１，２による実施例の出力電圧
特性図である。FIG. 3 is an output voltage characteristic diagram of the embodiment according to FIGS.
【００１９】図３において、同軸ケーブル未接続時間ｔ
１では、出力電圧ＶO は、低電圧ＶOLで安定化され、同
軸ケーブル接続時間ｔ２では出力電圧ＶO は徐徐に高電
圧ＶOHまで上昇して安定化される。その後、再び同軸ケ
ーブル未接続時間ｔ３となると、徐徐に出力電圧ＶO が
低電圧ＶOLまで下降し、安定化される。In FIG. 3, the coaxial cable non-connection time t
At 1, the output voltage V O is stabilized at the low voltage V OL , and at the coaxial cable connection time t2, the output voltage V O gradually rises to the high voltage V OH and is stabilized. Thereafter, when the coaxial cable non-connection time t3 comes again, the output voltage V O gradually decreases to the low voltage V OL and is stabilized.
【００２０】[0020]
【発明の効果】以上説明したように本発明は、スイッチ
ングレギュレータからの直流電圧が信号電圧に重畳され
た同軸ケーブルの脱着作業時における負荷電流の存在の
検出を介して同軸ケーブルの脱着状態を把握し、同軸ケ
ーブル装着時には供給電力の電圧を抑圧することによ
り、作業ミスやコネクタの不良による感電事故や短絡事
故を根本的に排除することができる効果を有する。As described above, according to the present invention, the detached state of the coaxial cable is grasped by detecting the presence of the load current during the detaching operation of the coaxial cable in which the DC voltage from the switching regulator is superimposed on the signal voltage. However, by suppressing the voltage of the supplied power when the coaxial cable is mounted, there is an effect that an electric shock accident or a short circuit accident due to a work error or a defective connector can be fundamentally eliminated.
【図１】本発明の一実施例の全体構成を示すブロック図
である。FIG. 1 is a block diagram showing the overall configuration of an embodiment of the present invention.
【図２】図１の同軸ケーブル接続保護機能付スイッチン
グレギュレータの構成を示すブロック図である。FIG. 2 is a block diagram showing a configuration of a switching regulator with a coaxial cable connection protection function of FIG. 1;
【図３】図１および２による実施例の出力電圧特性図で
ある。FIG. 3 is an output voltage characteristic diagram of the embodiment according to FIGS. 1 and 2;
【図４】従来のスイッチングレギュレータの運用状態を
示すブロック図である。FIG. 4 is a block diagram showing an operation state of a conventional switching regulator.
【図５】図４のスイッチングレギュレータの構成を示す
ブロック図である。FIG. 5 is a block diagram illustrating a configuration of the switching regulator of FIG. 4;
１，１Ａ 電力供給側 ２ 電力消費側 ３，４ 信号ライン ５ 同軸ケーブル ６ 同軸ケーブル接続保護機能付スイッチングレギュ
レータ ７，８ 電源ライン ９ スイッチング素子 １０ トランス １１ 整流ダイオード １２ チョークコイル １３ 平滑フィルタ １４ 同軸ケーブル接続検出回路 １５ 出力電圧安定化回路 １６ 出力電圧可変回路 １７ ＰＷＭ制御回路 １８ スイッチングレギュレータ1, 1A power supply side 2 power consumption side 3, 4 signal line 5 coaxial cable 6 switching regulator with coaxial cable connection protection function 7, 8 power supply line 9 switching element 10 transformer 11 rectifier diode 12 choke coil 13 smoothing filter 14 coaxial cable connection Detection circuit 15 Output voltage stabilization circuit 16 Output voltage variable circuit 17 PWM control circuit 18 Switching regulator
Claims (1)
して電力を送出すべく直流出力電圧を電力供給側から電
力負荷側に送出する場合に、前記同軸ケーブル脱着時の
短絡および感電事故を抑止する保護機能を付加した同軸
ケーブル接続保護機能付スイッチングレギュレータであ
って、出力電圧を可変とする制御を前記同軸ケーブルの
脱着情報に追随して行なう出力電圧可変回路と、前記同
軸ケーブルの脱着状態に対応した負荷電流の無および有
の状態を検出して前記出力電圧可変回路に前記脱着情報
を供給する同軸ケーブル接続検出回路とを備えることを
特徴とする同軸ケーブル接続保護機能付スイッチングレ
ギュレータ。When a DC output voltage is transmitted from a power supply side to a power load side to transmit power in a manner superimposed on a coaxial cable for transmitting a signal voltage, a short circuit and an electric shock accident when the coaxial cable is detached and connected are suppressed. A switching regulator with a coaxial cable connection protection function to which a protection function is added, wherein an output voltage variable circuit that performs control for changing an output voltage in accordance with the decoupling information of the coaxial cable, and a decoupling state of the coaxial cable. A switching regulator with a coaxial cable connection protection function, comprising: a coaxial cable connection detection circuit that detects absence and presence of a corresponding load current and supplies the detachment information to the output voltage variable circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16323092A JP2871953B2 (en) | 1992-06-23 | 1992-06-23 | Switching regulator with coaxial cable connection protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16323092A JP2871953B2 (en) | 1992-06-23 | 1992-06-23 | Switching regulator with coaxial cable connection protection function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06189535A JPH06189535A (en) | 1994-07-08 |
| JP2871953B2 true JP2871953B2 (en) | 1999-03-17 |
Family
ID=15769804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16323092A Expired - Lifetime JP2871953B2 (en) | 1992-06-23 | 1992-06-23 | Switching regulator with coaxial cable connection protection function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2871953B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5314412B2 (en) * | 2008-12-19 | 2013-10-16 | 株式会社アドバンテスト | Power supply device and test device |
| JP5845430B2 (en) * | 2010-06-17 | 2016-01-20 | パナソニックＩｐマネジメント株式会社 | COMMUNICATION DEVICE, ITS POWER SUPPLY METHOD, AND POWER SUPPLY SYSTEM |
-
1992
- 1992-06-23 JP JP16323092A patent/JP2871953B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06189535A (en) | 1994-07-08 |
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