JPS5984167A - Voltage detecting circuit - Google Patents
Voltage detecting circuitInfo
- Publication number
- JPS5984167A JPS5984167A JP57195530A JP19553082A JPS5984167A JP S5984167 A JPS5984167 A JP S5984167A JP 57195530 A JP57195530 A JP 57195530A JP 19553082 A JP19553082 A JP 19553082A JP S5984167 A JPS5984167 A JP S5984167A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- power supply
- converter
- load
- point
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
【発明の詳細な説明】
(川 発明の技術分野
本発明は電気機器に使用する1n流電源における異常電
圧検出回路の改良に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to an improvement in an abnormal voltage detection circuit in a 1n current power supply used in electrical equipment.
(+)1 技術の背景
近年特に電子技術の発達に伴い多くの電気機器がヒの制
御機能を小形化・高信頼化するため集狽化半導体回路等
による論理回路やマイクロプロセッサを用いてその主制
御部とする手段が広く利用されるようになった。これ等
の電子回路は通常その作動用電源として例えばl)(、
’5V±10%を推奨規格としており、ユーザは通常そ
の電源電圧に変動を見込んで余裕を設け、電源をDes
V±5チに設定して使用することが用いられCいる。(+)1 Technology background In recent years, especially with the development of electronic technology, many electrical devices are using logic circuits based on integrated semiconductor circuits and microprocessors to make their control functions smaller and more reliable. Control means have become widely used. These electronic circuits usually use power sources for their operation, such as l)(,
'5V±10% is the recommended standard, and users usually allow for fluctuations in the power supply voltage and set the power supply to
It is often used by setting the voltage to V±5.
(cl 従来技術と問題点
従来よりこれ1等の電気機器における電子化回路1こよ
る制御機能はその構成上通常多くの組合せおよび順序回
路例えばレジスタ、フリップフロップあるいはこれ等の
集合よりなるメモリやマイクロプロセ、すはその動作中
番こ前述の電源電圧において10チを無作為に逸脱する
異常状態、例えば停電や電源故障の場合該電子化回路が
破壊または暴走したり、あるいは雑音によって誤動作し
易くなる異常動作状態を発生、またはバブルメモリ等の
ように電源遮断時においてもそのlI8傳データを保持
し続ける不揮発性メモリも例えばその畳込み/読出動作
中に、その電源における異常電圧発生に伴い該記憶デー
タが破壊されて折角の不揮発性メモリの特徴を生かすこ
となく、これ等を使用する電気機器の内外に重大な損害
を及ぼす場合が存在づ−る。(cl. Prior Art and Problems) Conventionally, the control function of electronic circuits in first-class electrical equipment is usually composed of many combinations and sequential circuits such as registers, flip-flops, or memory and microcontrollers consisting of registers, flip-flops, or sets of these. During the operation of the process, there is an abnormal condition in which the power supply voltage mentioned above randomly deviates from 10V, for example, in the event of a power outage or power failure, the electronic circuit may be destroyed or run out of control, or it may easily malfunction due to noise. A non-volatile memory that continues to retain its lI8 data even when an abnormal operating state occurs or when the power is cut off, such as a bubble memory, may also lose its memory due to the occurrence of an abnormal voltage in its power supply during its convolution/read operation. There are cases where data is destroyed and the characteristics of non-volatile memory are not fully utilized, causing serious damage to the inside and outside of electrical equipment that uses the non-volatile memory.
以−ヒの理由で従来より電気機器は電子化回路による制
御園能には電源より予め設定したしきい値を逸脱する典
常犠IFの発生を検出する(5号を電源切断予告信号と
して受信せしめ、その後引続き実1、% 0) JA常
電圧発生するこ吉があっても電源の負荷となる制御機能
他の諸回路に、重大な結果が発生するのを未然に防止f
るための対In Wb作例えば制御機能による緊急停止
を1O−1(10μsの短時間に行イ)ぜて母体の1気
機器の門外における損害発生を防止する手段が提供され
Cいる。For this reason, electrical equipment has conventionally been controlled by electronic circuits to detect the occurrence of a normal sacrificial IF that deviates from a preset threshold value from the power supply (no. 5 is received as a power cutoff warning signal). 1,% 0)
For example, a means is provided for preventing damage to the primary equipment outside the gate by causing an emergency stop by the control function in a short period of 10 μs.
m 11’Y]l+l 、 (bl 、 telに従来
に、担ける′1“電源の電圧検出回路のブlコック図を
示す。図において1は直流電源、2は負荷1.3,3a
は比較回路、J)はダイオード、Cはコンデンサおよび
Lはコイルである〇直流+(1,源目ま通常で電源ソー
スとして商用交流電源(AC) <用いるため11荷に
必安な規格電圧例えばDCBV±5%をAC入力電圧変
動および負荷の消費電流変化ならびに環境例えば環境温
度の変化に拘わらず維持するため、交流/直流変換機能
の他定電圧機能を備える。また直流電源1はフローテン
グ方式等による電池が使用されることもある。m 11'Y]l+l, (bl, tel) Shows a Brookock diagram of a voltage detection circuit for a '1'' power supply that can be carried conventionally. In the figure, 1 is a DC power supply, and 2 is a load 1.3, 3a.
is a comparison circuit, J) is a diode, C is a capacitor, and L is a coil. In order to maintain DCBV ±5% regardless of AC input voltage fluctuations, changes in load current consumption, and changes in the environment such as environmental temperature, it is equipped with a constant voltage function in addition to an AC/DC conversion function.The DC power supply 1 is of a floating type. Batteries such as batteries may also be used.
負荷2は前述のように制御機能を含む電源負荷である。The load 2 is a power supply load including a control function as described above.
比較回路3は図示省略したが主体は単数または複数の演
算増幅器とその動作レベルを設定する複数の抵抗からな
る差動増幅回路形式による比較機能を育し、外部の例え
ば基準電圧源よりの基準電圧Vrefと入力、信号電圧
viとを比較し、前記複数の抵抗によって予め設定され
る単数または複数のしきい値を入力信号電圧■iが逸脱
するときは比較回路3の出力電圧を平常時電位より転移
させ、電源切断予告信号Vpfを負荷2に送出するもの
である、こ\で入力信号電圧Viacを交流とする比較
回路3aは更に交流/直流変換機能または位相差検出機
能等を備えて同杼の電源切断予告信号Vpfを送出する
ものとする。第1図Fa)はダイオードDを通して電流
を供給し、A点の電圧が急に下ってもダイオードDの逆
流防止機能とコンデンサCの容量に蓄積する電荷により
てB点の電圧降下を一時的に防止する。この一時的にB
点の電圧が保持されている間に電源切断予告411号V
pfを受信して負荷2はその対策例えばその機能を緊急
停止する。Although the comparison circuit 3 is not shown in the figure, its main component is a differential amplifier circuit consisting of one or more operational amplifiers and a plurality of resistors that set their operating levels. Vref is compared with the input signal voltage vi, and when the input signal voltage i deviates from one or more threshold values preset by the plurality of resistors, the output voltage of the comparator circuit 3 is lowered from the normal potential. The comparator circuit 3a whose input signal voltage Viac is AC is further equipped with an AC/DC conversion function or a phase difference detection function. It is assumed that a power cutoff notice signal Vpf is sent out. Figure 1 Fa) supplies current through diode D, and even if the voltage at point A suddenly drops, the voltage drop at point B is temporarily suppressed by the backflow prevention function of diode D and the charge accumulated in the capacitance of capacitor C. To prevent. This temporary B
Power cutoff notice No. 411 V while the voltage at the point is maintained
Upon receiving the pf, the load 2 takes countermeasures, for example, by urgently stopping its function.
この回路ではダイオードDを通じて常時電流が供給され
るため、タイオードDの順方向抵抗によるm、圧降下分
Vfだけ電源電圧を高くする必要がある他、電圧降下V
fの電流依存性による負荷電流の変動に伴い負荷に対す
る電圧の変動率が大きくなる。また過電圧時ではダイオ
ードDの逆上機能が得られないので検出性能が不足電圧
の検出性能に比較して相対的に劣るという欠点があった
。In this circuit, current is constantly supplied through diode D, so in addition to the need to increase the power supply voltage by m due to the forward resistance of diode D and voltage drop Vf, the voltage drop V
As the load current changes due to the current dependence of f, the voltage fluctuation rate with respect to the load increases. Furthermore, since the overvoltage function of the diode D cannot be obtained at the time of overvoltage, there is a drawback that the detection performance is relatively inferior to the detection performance of undervoltage.
第1図[blは第1図+alのダイオードDをコイルL
に替えてその欠点を除いた回路であるが直流電源に異常
電圧が発生した時その変化が緩やかであるとA、C点間
に電圧差が生じないため検出不能になる場合がある。Figure 1 [bl is the diode D in Figure 1 + al and the coil L
However, if an abnormal voltage occurs in the DC power supply and the change is gradual, there will be no voltage difference between points A and C, so detection may become impossible.
第1図(clは直流電源lの入力となるA、Cを直接検
出する回路である。被検出対象が交流であるため、直流
レベルに変換する方法は検出時間がか5り過ぎて実用上
問題があり、直接変流の位相検出を行う比較回路はその
構成が複雑になり、且直流電源1の故障については検出
不可能となる等の欠点を有していた。Figure 1 (cl is a circuit that directly detects A and C, which are the inputs of the DC power supply l. Since the object to be detected is AC, the method of converting it to DC level takes too much detection time and is not practical. The comparator circuit that directly detects the phase of current transformation has a complicated structure, and has the disadvantage that failures in the DC power supply 1 cannot be detected.
(di 発明の目的
本発明の目的は上記の諸欠点を除去し、直流電源の電圧
降下速厩に依存することなく直流電源の異常動作を過不
足電圧として捕え予め設定したしきい値を逸脱したとき
は過不足の変化方向および変化速度に関係なく、且電流
依存性を伴わない賢定な電圧検出回路を提供しようとす
るものである。(di) Purpose of the Invention The purpose of the present invention is to eliminate the above-mentioned drawbacks, and to detect abnormal operation of a DC power supply as an excess or shortage of voltage without depending on the voltage drop rate of the DC power supply, and to detect deviations from preset threshold values. The purpose of the present invention is to provide a smart voltage detection circuit that is independent of the direction and speed of change, whether excessive or insufficient, and is free from current dependence.
tel 発明の構成
この目的は単数または複数の負荷に規格電圧を供給する
@流電源供給システムにおいて、DC−1JC変換器を
介して負荷に規格ti臣を供給するよう構成するととも
に、別途予め設定した基準電圧と該1)e−1)(,1
変換器に入力する直流電源の出力電圧を比較検出する手
段を備え、該比較検出手段により該直流電源の異常電圧
を検出したとき電源切断予告信号を前記負荷に送出通報
するよう構成したことを特徴とする電圧検出回路を提供
することによって達成することが・出来る。tel Structure of the Invention The purpose of this invention is to provide a current power supply system that supplies a standard voltage to one or more loads, which is configured to supply a standard voltage to the load via a DC-1JC converter, and to supply a standard voltage to the load via a DC-1JC converter. Reference voltage and 1)e-1)(,1
It is characterized by comprising means for comparing and detecting the output voltage of the DC power source input to the converter, and configured to send and notify the power cut-off notice signal to the load when the comparing and detecting means detects an abnormal voltage of the DC power source. This can be achieved by providing a voltage detection circuit that does this.
[f+ 発明の実施例
以下図面を参照しつ\本発明の一実施例について説明す
る。[f+ Embodiment of the Invention An embodiment of the invention will be described below with reference to the drawings.
第2図は本発明の一実施例における寛圧検1iS回路の
ブロック図である。FIG. 2 is a block diagram of a toleration detection 1iS circuit in one embodiment of the present invention.
図において1は直流電源、2は負荷、3は比較回路、4
はDC−DC変換器およびCはコンデンサである。図の
符号で第1図(ai 、 (bl 、 (clと共通の
符号を有Tる構成部材はその機能も従来の共通符号に共
通である。゛
不発明をS成するDC,DC変換器4は通常その入力電
圧変動±10チレベルまたはそれ以上の変動に対し、負
荷電流変動を加えても±5−の出力電圧を保つような定
電圧機能を付加して構成されるので、A点における電圧
異常±5〜10%の例えば±6%にしきい値を設定して
電源切断予告信号Vpfを送出するようにすれば、A点
の電圧が±6%を逸脱し±10%に至る迄はD点の電圧
を1)−])変換器4が±5%以内に保持し続けるので
比較回路3は充分な余裕時間の下に確実な電源切断予告
信号Vpfを送出fることか出来る。才たこの比較回路
3による比較検出動作はA点の変動速度に依存性なく作
動する。またD点の電圧保持をコンデンサCの容量値に
依存することなく任意に設定出来るので、コンデンサC
を過容敵としたときに問題となる直流電源またはDC−
1)C変換器において発生ずる定電圧安定動作における
応答速度の低下やリンギング昏の不安定動作を防止する
副次的な効果も得られる。尚以上はすべて単数の負荷孔
単数の供給電源としたが複数の負荷孔複数の供給電源ま
たはその相互組合せにおいても同様に実施出来る。In the figure, 1 is a DC power supply, 2 is a load, 3 is a comparison circuit, and 4
is a DC-DC converter and C is a capacitor. Components having the same reference numerals as those in Figure 1 (ai, (bl, (cl)) have the same functions as the conventional common reference numerals. 4 is usually configured with a constant voltage function that maintains an output voltage of ±5- even if load current fluctuations are added to the input voltage fluctuation of ±10-chi level or more. If the voltage abnormality threshold value is set to ±5 to 10%, for example ±6%, and the power cutoff notice signal Vpf is sent, the voltage at point A will deviate from ±6% and reach ±10%. Since the voltage at point D is maintained within ±5% by the converter 4, the comparator circuit 3 can send out the reliable power cutoff warning signal Vpf within a sufficient margin of time. The comparison detection operation by the octopus comparator circuit 3 operates without depending on the fluctuation speed of point A. Also, since the voltage retention at point D can be set arbitrarily without depending on the capacitance value of capacitor C,
DC power supply or DC-
1) A secondary effect of preventing a decrease in response speed in constant voltage stable operation and unstable operation due to ringing that occurs in a C converter can also be obtained. Although the above description is based on a power source supplied to a single load hole, the present invention can be implemented in the same manner with a power source provided through a plurality of load holes or a mutual combination thereof.
tgl 発明の詳細
な説明したように本発明によれは従来の電圧検出回路に
おける欠点を除去し、電圧の変動方向および変化速度に
関係ない安定な電圧検出回路が得られるので有用である
。tgl DETAILED DESCRIPTION OF THE INVENTION As described above, the present invention is useful because it eliminates the drawbacks of conventional voltage detection circuits and provides a stable voltage detection circuit that is independent of the direction and speed of voltage variation.
第11″;/1[al 、 lbl 、 (clは従来
の市、圧検出1目1路に;はけるブロック図、第2図は
不発明の一実施例における電圧検出回路によるブロック
図である0図において1は直流電源、2は負荷、3.3
a4ま比較回路および4は1)e−L)C変換器である
。
407−
ノU
♂Vref
第2(d11'';/1 [al, lbl, (cl is a conventional circuit, pressure detection 1st line 1st path; block diagram; Fig. 2 is a block diagram of a voltage detection circuit in an embodiment of the invention) 0 In the figure, 1 is the DC power supply, 2 is the load, 3.3
A4 is a comparison circuit and 4 is a 1)e-L)C converter. 407- ノU ♂Vref 2nd (d
Claims (1)
供給システムにおいて、1)C−DC変換器を介して負
荷に規格電圧を供給するよう構成するとともlこ、別途
予め設定した基Qk電圧と#Dc−DC変換器に入力す
る直流電源の出力電圧を比較検出する手段を備え、該比
較検出手段に4゛り該直流電源の異常電圧を検出したと
き、電源切断予告僅号を前記負荷に送出通報するよう構
成したことを特電とする電、圧検出回路。In a direct current source supply system that supplies a standard voltage to one or more 9 loads, 1) If the standard voltage is supplied to the load via a C-DC converter, a separately preset group Qk is used. It is equipped with a means for comparing and detecting the voltage and the output voltage of the DC power supply input to the #DC-DC converter, and when the comparing and detecting means detects an abnormal voltage of the DC power supply, the power cutoff notice number is issued as mentioned above. A voltage/pressure detection circuit configured to send out a notification to the load.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57195530A JPS5984167A (en) | 1982-11-08 | 1982-11-08 | Voltage detecting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57195530A JPS5984167A (en) | 1982-11-08 | 1982-11-08 | Voltage detecting circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5984167A true JPS5984167A (en) | 1984-05-15 |
Family
ID=16342616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57195530A Pending JPS5984167A (en) | 1982-11-08 | 1982-11-08 | Voltage detecting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5984167A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01214212A (en) * | 1988-02-23 | 1989-08-28 | Anritsu Corp | Overvoltage protective circuit |
JPH0255517A (en) * | 1988-08-18 | 1990-02-23 | Mitsubishi Electric Corp | Circuit breaker |
JPH0260411A (en) * | 1988-08-25 | 1990-02-28 | Mitsubishi Electric Corp | Circuit breaker |
-
1982
- 1982-11-08 JP JP57195530A patent/JPS5984167A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01214212A (en) * | 1988-02-23 | 1989-08-28 | Anritsu Corp | Overvoltage protective circuit |
JPH0255517A (en) * | 1988-08-18 | 1990-02-23 | Mitsubishi Electric Corp | Circuit breaker |
JPH0260411A (en) * | 1988-08-25 | 1990-02-28 | Mitsubishi Electric Corp | Circuit breaker |
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