JP2707614B2 - Power supply voltage detector - Google Patents
Power supply voltage detectorInfo
- Publication number
- JP2707614B2 JP2707614B2 JP63177631A JP17763188A JP2707614B2 JP 2707614 B2 JP2707614 B2 JP 2707614B2 JP 63177631 A JP63177631 A JP 63177631A JP 17763188 A JP17763188 A JP 17763188A JP 2707614 B2 JP2707614 B2 JP 2707614B2
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- circuit
- voltage detection
- output
- detection circuit
- 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 - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は直流電源回路の出力電圧低下を予告する電源
電圧検出装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply voltage detecting device for notifying a decrease in output voltage of a DC power supply circuit.
従来、電圧検出装置は通信システムなどの保全機能を
向上させる為、出力電圧の過不足電圧検出回路を有し、
異常な出力電圧を検出して電源を停止させると共に、電
源アラーム信号を送出する機能を有する。Conventionally, the voltage detection device has an over / under voltage detection circuit of the output voltage to improve the maintenance function of the communication system, etc.
It has a function of detecting an abnormal output voltage, stopping the power supply, and transmitting a power supply alarm signal.
上述した従来の電圧検出装置においては、過不足電圧
検出回路は検出信号により電源を停止させてしまう為、
検出回路のバラツキ、出力電圧のバラツキ、雑音等によ
る相対的な検出レベルの変動に対し誤動作を防ぐ必要が
あり、検出レベルの中心値は出力電圧に対し20〜30％ず
らせて設定していた。この過不足電圧検出回路は電源の
壊滅的な障害を検出するものとして有効であるが、負荷
となる集積回路（IC）の動作保証範囲±５％を検出する
ことができず、システムが高速化され、電源電圧の変動
によるタイミングのずれが致命的なシステムエラーを引
起すようになった現在では、電源の機能障害、過負荷等
により出力電圧が中間レベルにクランプされた場合、電
源アラームを出せない状態でシステムエラーを引起す事
故が発生している。このような事故はシステムの増設等
により従来より負荷が重くなり電源の出力電圧が低下し
た時に発生することが多い。In the conventional voltage detection device described above, the over / under voltage detection circuit stops the power supply according to the detection signal,
It is necessary to prevent malfunction due to variations in the detection level, variations in the output voltage, and fluctuations in the relative detection level due to noise, etc., and the center value of the detection level is set to be shifted from the output voltage by 20 to 30%. Although this over / under voltage detection circuit is effective for detecting catastrophic failure of the power supply, it cannot detect the guaranteed operation range of the integrated circuit (IC) as a load of ± 5%, and the system speeds up. Now, timing deviations due to power supply voltage fluctuations have caused fatal system errors.If the output voltage is clamped to an intermediate level due to power supply malfunction, overload, etc., a power supply alarm can be issued. There is an accident that causes a system error in the absence. Such an accident often occurs when the load becomes heavier than before and the output voltage of the power supply decreases due to the addition of a system or the like.
本発明の電源電圧検出回路は、直流電源回路の出力端
子間に接続され前記直流電源回路の出力異常を検出した
ときは前記直流電源回路の動作を停止させる第１の電圧
検出回路と、前記直流電源回路の動作停止時に電源アラ
ーム信号を送出する第１の信号送出回路と、前記直流電
源回路の出力端子間に接続され前記直流電源回路の出力
が予め定めた範囲外になったことを検出するだけで前記
直流電源回路の動作を停止させない第２の電圧検出回路
と、この第２の電圧検出回路により駆動され電源アラー
ム信号を送出する第２の信号送出回路とから構成され
る。The power supply voltage detection circuit according to the present invention includes a first voltage detection circuit that is connected between output terminals of the DC power supply circuit and that stops the operation of the DC power supply circuit when detecting an output abnormality of the DC power supply circuit; A first signal transmission circuit for transmitting a power supply alarm signal when the operation of the power supply circuit is stopped; and a first signal transmission circuit that is connected between output terminals of the DC power supply circuit and detects that an output of the DC power supply circuit is out of a predetermined range. A second voltage detection circuit that does not stop the operation of the DC power supply circuit alone, and a second signal transmission circuit that is driven by the second voltage detection circuit and transmits a power supply alarm signal.
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.
第１図は本発明の一実施例を示す図である。１は入力
電源、２は電源アラーム信号送出回路、３は直流電源回
路である。また、４は過不足電圧検出回路であり、出力
ａにより直流電源回路３を停止させると共に送出回路２
を駆動し、リレー接点2aにより電源アラーム信号を送出
する。５は電圧検出回路、６は電圧検出回路５より駆動
され、リレー接点6aにより電源アラーム信号を送出する
電源アラーム信号送出回路である。7,8は直流電源回路
３の出力端子である。FIG. 1 shows an embodiment of the present invention. 1 is an input power supply, 2 is a power supply alarm signal transmission circuit, and 3 is a DC power supply circuit. Reference numeral 4 denotes an over / under voltage detection circuit which stops the DC power supply circuit 3 by the output a and outputs
And a power alarm signal is transmitted by the relay contact 2a. Reference numeral 5 denotes a voltage detection circuit, and reference numeral 6 denotes a power alarm signal transmission circuit driven by the voltage detection circuit 5 and transmitting a power alarm signal by a relay contact 6a. 7, 8 are output terminals of the DC power supply circuit 3.
第２図は同実施例の動作を示す図であり、ｃは電源出
力電圧の変動範囲を、b,dは過不足電圧検出回路４の検
出値変動範囲を、ｆは負荷側ICが正常にシステム動作す
る電圧範囲を、かつｇは電圧検出回路５の変動範囲をそ
れぞれ示す。また、e1,e2は雑音マージンである。従
来、過不足電圧検出範囲はｃ＋e1またはｃ＋e2を全変動
領域でオーバーラップさせない為、中心値を大幅にずら
していた。それ故、ｆの下限または上限はｂまたはｄの
中間的となり、ｆの範囲を外れても電源アラームを出せ
ない場合があった。本発明の一実施例において、ｇの検
出範囲はｆをカバーするように設定する為、変動範囲は
ｃの領域に喰込む場合があるが、変動は確率論的に発生
する為に正常領域で電源アラームを発生する確率は極め
て小さい。電圧検出回路５はアラーム送出能力を持つが
電源動作を停止させない為、電源の出力がシステムエラ
ーを起さない範囲で低下した時、電源の運転を維持しつ
つメンテナンス要員に電源異常を通報することができ、
システムの予防保全に大きな効果を与える。FIG. 2 is a diagram showing the operation of the embodiment, where c is the fluctuation range of the power supply output voltage, b and d are the fluctuation ranges of the detection value of the over / under voltage detection circuit 4, and f is the normal operation of the load side IC. G indicates a voltage range in which the system operates, and g indicates a fluctuation range of the voltage detection circuit 5. Further, e1 and e2 are noise margins. Conventionally, in the over / under voltage detection range, c + e1 or c + e2 does not overlap in the entire fluctuation region, so that the center value is largely shifted. Therefore, the lower limit or the upper limit of f is halfway between b and d, and there is a case where the power supply alarm cannot be issued even if the value is out of the range of f. In one embodiment of the present invention, since the detection range of g is set to cover f, the range of variation may enter into the region of c, but the variation occurs stochastically, so that The probability of generating a power alarm is extremely small. Since the voltage detection circuit 5 has an alarm sending capability but does not stop the power supply operation, when the output of the power supply falls within a range that does not cause a system error, it is necessary to notify the maintenance personnel of the power supply abnormality while maintaining the power supply operation. Can be
It has a great effect on preventive maintenance of the system.
このように、システムの保全は電源異常を通報する予
告信号により行うことができるが、より容易に保全を行
う為には、第３図に示すように、電源自身に警告ランプ
を設けても良い。つまり、同図において、6bは信号送出
のためのリレー接点であり、電源アラーム信号送出回路
６の動作により閉成し、抵抗９を通して警告ランプ10を
点灯させる。なお、警告ランプの代りに通常電源でよく
用いられる動作表示ランプを滅灯させても良い。As described above, the maintenance of the system can be performed by the advance notice signal for notifying the power supply abnormality. However, for easier maintenance, a warning lamp may be provided in the power supply itself as shown in FIG. . That is, in the figure, reference numeral 6b denotes a relay contact for transmitting a signal, which is closed by the operation of the power alarm signal transmitting circuit 6, and turns on the warning lamp 10 through the resistor 9. Note that, instead of the warning lamp, an operation display lamp often used in a normal power supply may be extinguished.
以上説明したように本発明によれば、電圧検出回路に
より駆動されて電源アラーム信号を送出する電源アラー
ム信号送出回路を設け、電源出力電圧がシステムの動作
保証範囲にある内に電源異常予告を行うことにより、障
害予防保全に大きな効果がある。As described above, according to the present invention, the power supply alarm signal transmission circuit which is driven by the voltage detection circuit and transmits the power supply alarm signal is provided, and the power supply abnormality is notified while the power supply output voltage is within the operation guarantee range of the system. This has a great effect on preventive maintenance.
第１図は本発明の一実施例を示す構成図、第２図は同実
施例の動作を示す図、第３図は第１図に示す電源電圧検
出装置の変更例を示す図である。 １……入力電源、２……電源アラーム信号送出回路、３
……直流電源回路、４……過不足電圧検出回路、５……
電圧検出回路、６……電源アラーム信号送出回路、7,8
……出力端子、10……警告ランプ。FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the operation of the embodiment, and FIG. 3 is a diagram showing a modification of the power supply voltage detecting device shown in FIG. 1 input power supply 2 power supply alarm signal transmission circuit 3
... DC power supply circuit, 4 ... Over / under voltage detection circuit, 5 ...
Voltage detection circuit, 6 Power supply alarm signal transmission circuit, 7, 8
…… Output terminal, 10 …… Warning lamp.
Claims (1)
直流電源回路の出力異常を検出したときは前記直流電源
回路の動作を停止させる第１の電圧検出回路と、前記直
流電源回路の動作停止時に電源アラーム信号を送出する
第１の信号送出回路と、前記直流電源回路の出力端子間
に接続され前記直流電源回路の出力が予め定めた範囲外
になったことを検出するだけで前記直流電源回路の動作
を停止させない第２の電圧検出回路と、この第２の電圧
検出回路により駆動され電源アラーム信号を送出する第
２の信号送出回路とから構成されることを特徴とする電
源電圧検出装置。A first voltage detection circuit connected between output terminals of the DC power supply circuit for stopping operation of the DC power supply circuit when an output abnormality of the DC power supply circuit is detected; A first signal transmission circuit for transmitting a power supply alarm signal when the power supply is stopped, and a DC signal supply circuit connected between output terminals of the DC power supply circuit, which detects the output of the DC power supply circuit outside a predetermined range and detects the DC power supply only by detecting that the output is out of a predetermined range. Power supply voltage detection, comprising: a second voltage detection circuit that does not stop the operation of the power supply circuit; and a second signal transmission circuit driven by the second voltage detection circuit and transmitting a power supply alarm signal. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63177631A JP2707614B2 (en) | 1988-07-15 | 1988-07-15 | Power supply voltage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63177631A JP2707614B2 (en) | 1988-07-15 | 1988-07-15 | Power supply voltage detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0226217A JPH0226217A (en) | 1990-01-29 |
| JP2707614B2 true JP2707614B2 (en) | 1998-02-04 |
Family
ID=16034379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63177631A Expired - Fee Related JP2707614B2 (en) | 1988-07-15 | 1988-07-15 | Power supply voltage detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2707614B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2272866A (en) * | 1992-11-20 | 1994-06-01 | Gerber Scient Products Inc | Non-photographic production of planographic printing plates. |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5995736U (en) * | 1982-12-17 | 1984-06-29 | 株式会社ムサシ電機計器製作所 | power alarm device |
| JPS59151382U (en) * | 1983-03-25 | 1984-10-09 | 株式会社島津製作所 | alarm device |
| JPS63262020A (en) * | 1987-04-20 | 1988-10-28 | 富士通株式会社 | Alarm control circuit of rectifier |
-
1988
- 1988-07-15 JP JP63177631A patent/JP2707614B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0226217A (en) | 1990-01-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |