JPH04193026A - Method and device for dealing with power interruption - Google Patents
Method and device for dealing with power interruptionInfo
- Publication number
- JPH04193026A JPH04193026A JP2321228A JP32122890A JPH04193026A JP H04193026 A JPH04193026 A JP H04193026A JP 2321228 A JP2321228 A JP 2321228A JP 32122890 A JP32122890 A JP 32122890A JP H04193026 A JPH04193026 A JP H04193026A
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- Prior art keywords
- signal
- output
- power outage
- low voltage
- power
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Links
- 238000000034 method Methods 0.000 title claims description 8
- 238000001514 detection method Methods 0.000 claims abstract description 57
- 238000009499 grossing Methods 0.000 claims description 9
- 238000011084 recovery Methods 0.000 abstract 1
- 230000002459 sustained effect Effects 0.000 abstract 1
- 230000005856 abnormality Effects 0.000 description 4
- 238000003672 processing method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- Protection Of Static Devices (AREA)
- Dc-Dc Converters (AREA)
- Power Sources (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔概要〕
停電検出回路と低電圧検出回路を備えている電源ユニッ
トの停電処理方法および停電処理装置に関し、
停電発生後から低電圧アラームが検出されるまでの間は
ＤＣ−ＤＣコンバータを動作させることができるように
することを目的とし、
停電検出回路と低電圧検出回路を持つ電源ユニットにお
いて、停電発生時に停電検出した後では低電圧アラーム
の出力を抑制し、低電圧検出するまでは停電信号の出力
を抑止して、低電圧検出してから停電信号を出力し、停
電復旧後に低電圧アラームを出力可能にするような構成
の方法および装置としたものである。[Detailed Description of the Invention] [Summary] Regarding a power outage processing method and a power outage processing device for a power supply unit equipped with a power outage detection circuit and a low voltage detection circuit, the DC - The purpose is to enable the DC converter to operate, and in a power supply unit that has a power outage detection circuit and a low voltage detection circuit, when a power outage occurs, after a power outage is detected, the output of the low voltage alarm is suppressed, and the low voltage The method and device are configured to suppress the output of a power outage signal until a low voltage is detected, output the power outage signal after detecting a low voltage, and enable output of a low voltage alarm after the power outage is restored.
本発明は、停電検出回路と低電圧検出回路を備えている
電源ユニットの停電処理方法および停電処理装置に関す
る。The present invention relates to a power outage processing method and a power outage processing device for a power supply unit that includes a power outage detection circuit and a low voltage detection circuit.
近年、停電検出回路と低電圧検出回路を有する電源ユニ
ットにおいて、停電対策としてはバッテリ等で対処して
いるか、小型化および低コスト化の面から小さい装置に
は適用できない。その為、停電時に出力電圧をてきるた
け維持し、かつ、データ破壊を防ぐだめの最少限の切断
処理方法を考える必要がある。In recent years, in power supply units having a power failure detection circuit and a low voltage detection circuit, a battery or the like is used as a countermeasure against power failure, or it cannot be applied to small devices from the viewpoint of downsizing and cost reduction. Therefore, it is necessary to consider a cutting process method that maintains the output voltage as much as possible during a power outage and prevents data from being destroyed.
従来の電源ユニットの停電処理装置は、第４図に示すよ
うに、交流電源から入力して整流する整流回路１と、整
流後の平滑化をする平滑回路２と、平滑回路２の出力か
ら必要な電圧を得るＤＣ−ＤＣコンバータ３，４と、平
滑回路２の出力から異常に電圧が下かったか調べる低電
圧検出回路５と、整流回路ｌの入力側から分岐した配線
を介して交流を入力し整流する整流回路６と、整流回路
６の出力から停電したか否かを調べる停電検出回路７か
らなっている。As shown in Fig. 4, a conventional power supply unit power failure processing device includes a rectifier circuit 1 that receives input from an AC power source and rectifies it, a smoothing circuit 2 that smoothes the rectified signal, and the output of the smoothing circuit 2. AC is input through DC-DC converters 3 and 4 that obtain a certain voltage, a low voltage detection circuit 5 that checks whether the voltage has dropped abnormally from the output of the smoothing circuit 2, and a wiring branched from the input side of the rectifier circuit 1. It consists of a rectifier circuit 6 that performs rectification, and a power failure detection circuit 7 that checks whether there is a power outage based on the output of the rectifier circuit 6.
この装置による停電処理は、停電検出回路７て入力電圧
か一定レベル以下に下がると停電とみなし、停電信号を
出力して強制的に切断処理を行なっていた。In handling a power outage using this device, when the input voltage drops below a certain level in the power outage detection circuit 7, it is regarded as a power outage, and a power outage signal is output to forcibly perform a disconnection process.
上記従来の電源ユニットの停電処理装置では、停電検出
を入力電圧たけて行ない、直流電圧かＤＣ−ＤＣコンバ
ータ３，４を動作させるために充分な電圧があっても、
停電検出後には直ちに電源切断処理をする、また、検出
レベルの設定を間違えると直流電圧の低電圧異常を検出
して低電圧アラームを出力するため、電源ユニットの故
障と誤って判断されるという問題点があった。In the conventional power supply unit power failure processing device described above, power failure detection is performed at every input voltage level, and even if there is sufficient DC voltage to operate the DC-DC converters 3 and 4,
After a power outage is detected, the power is immediately turned off. Also, if the detection level is incorrectly set, a low voltage abnormality in the DC voltage is detected and a low voltage alarm is output, resulting in a problem where it is mistakenly determined to be a failure of the power supply unit. There was a point.
本発明は、上記問題点に鑑みて成されたものであり、そ
の解決を目的として設定される技術的課題は、停電発生
後から低電圧アラームが検出されるまでの間はＤＣ−Ｄ
Ｃコンバータを動作させることができるようにした停電
処理方法および停電処理装置を提供することにある。The present invention has been made in view of the above problems, and the technical problem set for the purpose of solving the problem is that the DC-D
An object of the present invention is to provide a power outage processing method and a power outage processing device that enable a C converter to operate.
〔課題を解決するための手段 ）
本発明は、上記課題を解決するための具体的な手段とし
て、第１図に示すように、停電処理方法を構成するにあ
たり、停電検出回路１５と低電圧検出回路１３を持つ電
源ユニットにおいて、停電発生時に停電検出した後では
低電圧アラームの出力を抑制し、低電圧検出するまでは
停電信号の出力を抑止して、低電圧検出してから停電信
号を出力し、停電復旧後に低電圧アラームを出力可能に
しだものである。[Means for Solving the Problems] As a specific means for solving the above problems, the present invention provides, as shown in FIG. In a power supply unit with circuit 13, when a power outage occurs, after a power outage is detected, the output of a low voltage alarm is suppressed, the output of a power outage signal is suppressed until a low voltage is detected, and a power outage signal is output after a low voltage is detected. However, it is possible to output a low voltage alarm after the power is restored.
この方法を実現する装置としては、交流電源から入力し
整流して平滑したのち、ＤＣ−ＤＣコンバータ１２を介
して負荷に必要な電圧を供給するとともに、低電圧検出
回路１３により前記ＤＣ−ＤＣコンバータ１２の入力動
作保証電圧をチェックさせ、停電検出回路１５により停
電をチェックさせる電源ユニットにおいて、前記低電圧
検出回路１３の出力信号［Ａ］と前記停電検出回路１５
の出力信号［Ａ］とを入力する時、出力信号■を入力し
てから出力信号［Ａ］を入力するまての間は低電圧アラ
ーム信号および停電信号の出力を抑止し、出力信号■を
入力後に停電信号を出力させ、停電復旧後に低電圧アラ
ーム信号を出力可能にさせる警報出力手段１６を備えた
ものである。A device that implements this method inputs an AC power source, rectifies it, smoothes it, supplies the necessary voltage to the load via a DC-DC converter 12, and uses a low-voltage detection circuit 13 to supply the necessary voltage to the DC-DC converter. In the power supply unit, the output signal [A] of the low voltage detection circuit 13 and the power outage detection circuit 15 are checked.
When inputting output signal [A] of It is equipped with an alarm output means 16 which outputs a power outage signal after inputting it and enables output of a low voltage alarm signal after the power outage is restored.
前記警報出力手段１６には、第２図の実施例図に示すよ
うに、前記低電圧検出回路１３の出力信号［Ａ］と前記
停電検出回路１５の出力信号［Ｂ］を反転した信号との
論理積を低電圧アラーム信号として出力するアンド回路
２３ａと、前記低電圧検出回路１３の出力信号［Ａ］と
前記停電検出回路１５の出力信号［Ａ］との論理積を停
電信号として出力するアンド回路２３ｃを備えたものが
望ましい。As shown in the embodiment diagram in FIG. 2, the alarm output means 16 has a signal that is an inversion of the output signal [A] of the low voltage detection circuit 13 and the output signal [B] of the power failure detection circuit 15. an AND circuit 23a that outputs the logical product as a low voltage alarm signal; and an AND circuit 23a that outputs the logical product of the output signal [A] of the low voltage detection circuit 13 and the output signal [A] of the power failure detection circuit 15 as a power failure signal. It is desirable to have a circuit 23c.
本発明は上記構成により、停電が発生し、停電検出すべ
き電圧まで下がると、停電検出回路１５からの出力信号
■が警報出力手段１６に入力されて、停電が復旧するま
で低電圧アラームの出力が抑止される。そして、低電圧
アラームを出すべき電圧まて下かってくると、低電圧検
出回路１３からの出力信号■が警報出力手段１６に入力
され、警報出力手段１６から停電信号を出力して電源切
断処理させる。それから、停電が復旧すると、電圧が定
格値に復帰していれば、低電圧検出回路１３および停電
検出回路１５からは信号出力されなくなり、警報出力手
段１６からの信号出力もなくなる。停電復旧後は、警報
出力手段１６から低電圧アラーム信号が出力可能になり
、電源ユニットの故障を検知することができるようにな
る。According to the above configuration, when a power outage occurs and the voltage drops to the level that should be detected, the output signal ■ from the power outage detection circuit 15 is input to the alarm output means 16, and a low voltage alarm is output until the power outage is restored. is suppressed. Then, when the voltage at which a low voltage alarm should be issued falls, the output signal ■ from the low voltage detection circuit 13 is input to the alarm output means 16, and the alarm output means 16 outputs a power outage signal to cause the power to be cut off. . Then, when the power outage is restored, if the voltage has returned to the rated value, the low voltage detection circuit 13 and the power outage detection circuit 15 will no longer output signals, and the alarm output means 16 will no longer output signals. After the power is restored, a low voltage alarm signal can be output from the alarm output means 16, and a failure of the power supply unit can be detected.
この場合において停電検出があった場合には、出力信号
■が警報出力手段１６に入力されると、アンド回路２３
ａに入力される出力信号■を反転した信号がローレベル
になるため５、低電圧アラーム信号の出力が抑止され、
その後に、出力信号のが警報出力手段１６に入力されて
からアンド回路２３ｃより停電信号が出力される。In this case, when a power outage is detected, when the output signal ■ is input to the alarm output means 16, the AND circuit 23
Since the signal obtained by inverting the output signal ■ input to a becomes low level 5, the output of the low voltage alarm signal is suppressed,
Thereafter, the output signal is input to the alarm output means 16, and then a power outage signal is output from the AND circuit 23c.
電源正常時または停電が解除された後に、出力信号■が
警報出力手段１６に入力された場７合は、アンド回路２
３ａに入力される出力信号［Ｂ］を反転した信号かハイ
レベルになるため、低電圧アラーム信号が出力される。If the output signal ■ is input to the alarm output means 16 when the power supply is normal or after the power outage is canceled, the AND circuit 2
Since the inverted signal of the output signal [B] input to 3a becomes high level, a low voltage alarm signal is output.
以下、本発明の実施例として、論理ゲート回路により警
報出力手段を形成した場合について図示説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, a case where the alarm output means is formed by a logic gate circuit will be illustrated and explained below.
第２図に実施例装置の構成を示す。FIG. 2 shows the configuration of the embodiment device.
ここに、交流電源から入力して整流する整流回路１と、
整流後の平滑化をする平滑回路２之、平滑回路２の出力
から必要な電圧を得るＤＣ−ＤＣコンバータ３，４と、
整流回路１の入力側から分岐した配線を介して交流を入
力し整流する整流回路６とは、従来と同様の構成とする
。Here, a rectifier circuit 1 that receives input from an AC power source and rectifies it,
A smoothing circuit 2 that performs smoothing after rectification, DC-DC converters 3 and 4 that obtain the necessary voltage from the output of the smoothing circuit 2,
The rectifier circuit 6 that inputs and rectifies alternating current via wiring branched from the input side of the rectifier circuit 1 has the same configuration as the conventional one.
２１は平滑回路２の出力から異常に電圧が下がったか調
べる低電圧検出回路であって、ＤＣ−ＤＣコンバータ３
，４の入力端子の直前から分岐して直流電圧を入力し、
ＤＣ−ＤＣコンバータ３，４の入力動作保証の下限値（
保証動作限界）より高い電圧を検出し、下限値検出時に
はハイレベルとなる論理信号を送出するとともに、電源
内部の異常と判断して電源切断処理を行なう。21 is a low voltage detection circuit that checks whether the voltage has abnormally dropped from the output of the smoothing circuit 2;
, input the DC voltage by branching from just before the input terminal of 4,
Lower limit value for guaranteed input operation of DC-DC converters 3 and 4 (
It detects a voltage higher than the guaranteed operation limit) and sends out a logic signal that goes high when the lower limit is detected, and also determines that there is an abnormality inside the power supply and performs a power-off process.
２２は整流回路６の出力から停電したか否かを調べる停
電検出回路であって、整流回路６が整流した電圧を低電
圧検出回路２１が検出する電圧よりも高い電圧をレベル
カウンタで検出し、停電時にはハイレベルとなる論理信
号を送出する。Reference numeral 22 denotes a power outage detection circuit that checks whether a power outage has occurred from the output of the rectifier circuit 6, and detects a voltage rectified by the rectifier circuit 6 that is higher than the voltage detected by the low voltage detection circuit 21 using a level counter; During a power outage, a logic signal that becomes high level is sent out.
２３は警報出力手段としての停電警報回路であって、低
電圧検出回路２１の出力信号、［Ａ］と停電検出回路２
２の出力信号［Ａ］とが出力された時に停電信号を出力
し、実力信号■が入力されてから出力信号■か入力され
るまでの間では、ＵＶＡ （低電圧アラーム）信号およ
ｑ停電信号の出力を抑止し、出力信号■の入力後に停電
信号を出力さす、停電解除後に出力信号■が、入力され
た場合１こＵＶＡ信号を出力する。 ６
２３ａはＡＮＤ回路であって、低電１年検出−路２１の
出力信号［Ａ］と、停電検出回路２，２．ρ、出力信し
て、それらの論理積を出力する。この回路から出力され
るＵＶＡ信号は電源ユニットの異常を外部に通知する信
号であるが、停電検出するとインバータ２３ｂて反転さ
れた信号が入力されて抑止される。23 is a power failure alarm circuit as an alarm output means, which outputs the output signal of the low voltage detection circuit 21, [A] and the power failure detection circuit 2.
A power outage signal is output when the output signal [A] of 2 is output, and a UVA (low voltage alarm) signal and The output of the signal is suppressed, and a power outage signal is output after the output signal (2) is input.If the output signal (2) is input after the power outage is canceled, one UVA signal is output. 6 23a is an AND circuit which outputs the output signal [A] of the low power 1 year detection circuit 21 and the power outage detection circuits 2, 2 . ρ, and output their logical product. The UVA signal output from this circuit is a signal that notifies the outside of an abnormality in the power supply unit, but when a power failure is detected, an inverted signal is input to the inverter 23b and is suppressed.
２３ｃはＡＮＤ回路であって、低電圧検出回路２１の出
力信号■と停電検出回路２２の出力信号［Ａ］とを入力
して、それらの論理積を出力する。この回路から出力さ
れる停電信号は、停電時に外部へ電源が落ちたことを通
知する信号であり、復帰するまで保持される。23c is an AND circuit, which inputs the output signal (2) of the low voltage detection circuit 21 and the output signal [A] of the power failure detection circuit 22, and outputs the logical product thereof. The power outage signal output from this circuit is a signal that notifies the outside that the power has been cut off during a power outage, and is held until the power is restored.
このように構成した実施例において、停電発生時の処理
は、第３図に示すように、停電が発生してから一定時間
経過（例えば、定格値より電圧が下がり初めてから約３
０ｍ５ｅｃ）後、停電検出回路２１により停電検出され
、停電検出回路２１からの出力信号■がハイレベルとな
り、インバータ２３ｂを介してＡＮＤ回路２３ａに入力
されて外部に通知するＵＶＡ信号が出力されないように
抑止し、外部に対して正常動作を行う。この段階まては
、停電が復旧した場合に、停電検出回路２１からの出力
信号■かローレベルとなり、ＵＶＡ信号の抑止が解除さ
れて正常動作が行なわれる。In the embodiment configured as described above, the processing when a power outage occurs is performed after a certain period of time has elapsed since the power outage (for example, about 30 minutes after the voltage first dropped below the rated value), as shown in Figure 3.
After 0 m5ec), a power outage is detected by the power outage detection circuit 21, and the output signal ■ from the power outage detection circuit 21 becomes high level, and is input to the AND circuit 23a via the inverter 23b so that the UVA signal to notify the outside is not output. suppressed and performs normal operation to the outside. At this stage, when the power outage is restored, the output signal (2) from the power outage detection circuit 21 becomes low level, the suppression of the UVA signal is released, and normal operation is performed.
停電状態か続き、さらに電圧が下がって、低電圧検出回
路２１により低電圧検出され、出力信号■がハイレベル
となる譬輯限界に達すると、ＡＮＤ回路２３ｃから停電
信号か出力されて外部に停電であることを通知する。ま
た、低電圧検出されると、さらに電圧が下がりＤＣ−Ｄ
Ｃコンバータ３，４を動作させるために必要な動作限界
よりも低くなる前の、ＤＣ−ＤＣコンバータ３゜４が入
力動作保証されている間に電源切断処理を実行する。The power outage continues, and when the voltage drops further and the low voltage detection circuit 21 detects a low voltage and reaches the limit where the output signal becomes high level, a power outage signal is output from the AND circuit 23c to indicate a power outage to the outside. Notify that Also, when a low voltage is detected, the voltage will further drop and the DC-D
The power-off process is executed while the input operation of the DC-DC converters 3 and 4 is guaranteed, before the operating limit becomes lower than the operating limit necessary for operating the DC-DC converters 3 and 4.
このように実施例ては、停電時に直流電圧が停電検出さ
れた後、低電圧検出されるまでは正常動作を続けること
ができ、かつ停電と電源ユニ・ントの故障とか判別でき
る。また、直流電圧の立ち下す時間はＤＣ−ＤＣコンバ
ータ３．４により起動されるＮｏｌ出力、 Ｎｏ２出
力の容量により変化するため、容量が小さいほど停電耐
量が上昇し、停電してからシステムダウンするまでの時
間を遅くすることができる。In this way, in this embodiment, after a DC voltage power failure is detected during a power outage, normal operation can be continued until a low voltage is detected, and it is possible to distinguish between a power failure and a failure of the power supply unit. In addition, the fall time of the DC voltage changes depending on the capacity of the No. 1 and No. 2 outputs activated by the DC-DC converter 3.4, so the smaller the capacity, the higher the power outage tolerance, and the time from the power outage until the system goes down. time can be slowed down.
なお、上記実施例は本発明の趣旨をより良く理解させる
ために具体的に述べたもので、特に指定されない限り、
別態様を制限するものではない。It should be noted that the above-mentioned examples are specifically described in order to better understand the gist of the present invention, and unless otherwise specified,
This does not limit other embodiments.
以上のように本発明では、停電処理方法として、停電発
生時に停電検出した後では低電圧アラームの出力を抑制
し、低電圧検出するまでは停電信号の出力を抑止して、
低電圧検出してから停電信号を出力し、停電復旧後に低
電圧アラームを出力可能にしたことによって、直流電圧
が停電検出されるまでは負荷側で正常動作でき、しかも
電源ユニットの異常と停電とが判別できる。そして、負
荷側の容量が小さいほど、停電耐量が大きくなり、動作
可能時間を長くすることができる。As described above, in the present invention, as a power outage processing method, after a power outage is detected when a power outage occurs, the output of a low voltage alarm is suppressed, and the output of a power outage signal is suppressed until a low voltage is detected.
By outputting a power outage signal after detecting low voltage and outputting a low voltage alarm after the power outage is restored, normal operation can be performed on the load side until a DC voltage power outage is detected, and it also prevents power outages from occurring due to abnormalities in the power supply unit. can be determined. The smaller the capacity on the load side, the greater the power outage tolerance, and the longer the operable time.
停電処理装置として、警報出力手段１６を備え、低電圧
検出回路１３の出力信号［Ａ］と停電検出回路１５の出
力信号［Ａ］との入力により、出力信号■を入力してか
ら出力信号［Ｂ］を入力するまでの間は低電圧アラーム
信号および停電信号の出力を抑止し、出力信号のを入力
後に停電信号を出力させ、停電復旧後に低電圧アラーム
信号を出力可能にさせるようにしたことによって、停電
時にＤＣ−ＤＣコンバータ１２を入力動作か保証される
範囲でできるかぎり低い電圧になるまで動作させること
かできるようになり、停電検出後の負荷側の動作を長く
保つことがてき、停電時の処理が容易となり、システム
の保全が容易にてきる。As a power failure processing device, an alarm output means 16 is provided, and the output signal [A] is inputted by inputting the output signal [A] of the low voltage detection circuit 13 and the output signal [A] of the power failure detection circuit 15, and then the output signal [ The output of the low voltage alarm signal and the power outage signal is suppressed until the output signal B] is input, the power outage signal is output after the output signal is input, and the low voltage alarm signal is enabled to be output after the power outage is restored. This makes it possible to operate the DC-DC converter 12 in the event of a power outage until the input operation reaches the lowest possible voltage within the guaranteed range, and the operation of the load side can be maintained for a long time after a power outage is detected. This makes time processing easier and system maintenance easier.
この場合において、警報出力手段１６には、低電圧検出
回路１３の出力信号■と停電検出回路１５の出力信号［
Ｂ］を反転した信号との論理積を低電圧アラーム信号と
して出力するアンド回路２３ａと、低電圧検出回路１３
の出力信号［Ａ］と前記停電検出回路１５の出力信号［
Ａ］との論理積を停電信号として出力するアンド回路２
３ｃを備えたことにより、警報出力手段１６の構成が簡
素化でき、省スペース、省コストが実現できる。In this case, the alarm output means 16 includes the output signal ■ of the low voltage detection circuit 13 and the output signal [
an AND circuit 23a that outputs the logical product with a signal obtained by inverting B] as a low voltage alarm signal, and a low voltage detection circuit 13.
The output signal [A] of the power outage detection circuit 15 and the output signal [A] of the power outage detection circuit 15
AND circuit 2 that outputs the AND with A] as a power outage signal
3c, the configuration of the alarm output means 16 can be simplified, and space and cost can be saved.
第１図は、本発明の原理構成図、
第２図は、実施例装置の構成図、
第３図は、実施例による停電時の検出電圧を示すグラフ
、
第４図は、従来装置の構成図。
１１・・・整流平滑回路
１２・・・ＤＣ−ＤＣコンバータ
１３・・・低電圧検出回路
１４・・・整流回路
１５・・・停電検出回路
１６・・・警報出力手段Fig. 1 is a diagram of the principle configuration of the present invention; Fig. 2 is a diagram of the configuration of the embodiment device; Fig. 3 is a graph showing the detected voltage during a power outage according to the embodiment; Fig. 4 is the configuration of the conventional device. figure. 11... Rectifier smoothing circuit 12... DC-DC converter 13... Low voltage detection circuit 14... Rectifier circuit 15... Power failure detection circuit 16... Alarm output means
Claims (3)
を持つ電源ユニットにおいて、 停電発生時に停電検出した後では低電圧アラームの出力
を抑制し、低電圧検出するまでは停電信号の出力を抑止
して、低電圧検出してから停電信号を出力し、停電復旧
後に低電圧アラームを出力可能にする ことを特徴とする停電処理方法。(1) Power outage detection circuit (15) and low voltage detection circuit (13)
When a power outage occurs, the power supply unit suppresses the output of the low voltage alarm after detecting the power outage, suppresses the output of the power outage signal until low voltage is detected, and outputs the power outage signal after detecting the low voltage. A power outage handling method characterized by making it possible to output a low voltage alarm after power outage is restored.
−ＤＣコンバータ（１２）を介して負荷に必要な電圧を
供給するとともに、低電圧検出回路（１３）により前記
ＤＣ−ＤＣコンバータ（１２）の入力動作保証電圧をチ
ェックさせ、停電検出回路（１５）により停電をチェッ
クさせる電源ユニットにおいて、 前記低電圧検出回路（１３）の出力信号［Ａ］と前記停
電検出回路（１５）の出力信号［Ｂ］とを入力する時、
出力信号［Ｂ］を入力してから出力信号［Ａ］を入力す
るまでの間は低電圧アラーム信号および停電信号の出力
を抑止し、出力信号［Ａ］を入力後に停電信号を出力さ
せ、停電復旧後に低電圧アラーム信号を出力可能にさせ
る警報出力手段（１６）を備えた ことを特徴とする停電処理装置。(2) After inputting from AC power supply, rectifying and smoothing,
- The necessary voltage is supplied to the load via the DC converter (12), and the low voltage detection circuit (13) checks the guaranteed input operating voltage of the DC-DC converter (12), and the power failure detection circuit (15) In a power supply unit that checks for a power outage, when inputting the output signal [A] of the low voltage detection circuit (13) and the output signal [B] of the power outage detection circuit (15),
The output of the low voltage alarm signal and the power outage signal is suppressed between inputting the output signal [B] and inputting the output signal [A], and the power outage signal is output after the output signal [A] is input, and the power outage signal is output. A power outage processing device characterized by comprising an alarm output means (16) that makes it possible to output a low voltage alarm signal after restoration.
回路（１３）の出力信号［Ａ］と前記停電検出回路（１
５）の出力信号［Ｂ］を反転した信号との論理積を低電
圧アラーム信号として出力するアンド回路（２３ａ）と
、 前記低電圧検出回路（１３）の出力信号［Ａ］と前記停
電検出回路（１５）の出力信号［Ｂ］との論理積を停電
信号として出力するアンド回路（２３ｃ）を備えたこと を特徴とする請求項２記載の停電処理装置。(3) The alarm output means (16) includes the output signal [A] of the low voltage detection circuit (13) and the power failure detection circuit (1).
an AND circuit (23a) that outputs the logical product of the output signal [B] of 5) and an inverted signal as a low voltage alarm signal; and the output signal [A] of the low voltage detection circuit (13) and the power failure detection circuit. 3. The power outage processing device according to claim 2, further comprising an AND circuit (23c) which outputs a logical product with the output signal [B] of (15) as a power outage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2321228A JPH04193026A (en) | 1990-11-27 | 1990-11-27 | Method and device for dealing with power interruption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2321228A JPH04193026A (en) | 1990-11-27 | 1990-11-27 | Method and device for dealing with power interruption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04193026A true JPH04193026A (en) | 1992-07-13 |
Family
ID=18130243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2321228A Pending JPH04193026A (en) | 1990-11-27 | 1990-11-27 | Method and device for dealing with power interruption |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04193026A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009142061A (en) * | 2007-12-06 | 2009-06-25 | Denso Corp | Dc-dc converter |
| JP2013218841A (en) * | 2012-04-06 | 2013-10-24 | Canon Inc | Heating apparatus and image formation apparatus |
| US9290023B2 (en) | 2013-12-16 | 2016-03-22 | Canon Kabushiki Kaisha | Printing apparatus, control method, and storage medium |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02106122A (en) * | 1988-10-14 | 1990-04-18 | Hitachi Ltd | Power source interruption detecting system |
-
1990
- 1990-11-27 JP JP2321228A patent/JPH04193026A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02106122A (en) * | 1988-10-14 | 1990-04-18 | Hitachi Ltd | Power source interruption detecting system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009142061A (en) * | 2007-12-06 | 2009-06-25 | Denso Corp | Dc-dc converter |
| JP2013218841A (en) * | 2012-04-06 | 2013-10-24 | Canon Inc | Heating apparatus and image formation apparatus |
| US9290023B2 (en) | 2013-12-16 | 2016-03-22 | Canon Kabushiki Kaisha | Printing apparatus, control method, and storage medium |
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