JP2844906B2 - Uninterruptible power system - Google Patents
Uninterruptible power systemInfo
- Publication number
- JP2844906B2 JP2844906B2 JP2303369A JP30336990A JP2844906B2 JP 2844906 B2 JP2844906 B2 JP 2844906B2 JP 2303369 A JP2303369 A JP 2303369A JP 30336990 A JP30336990 A JP 30336990A JP 2844906 B2 JP2844906 B2 JP 2844906B2
- Authority
- JP
- Japan
- Prior art keywords
- acid battery
- sealed lead
- power supply
- circuit voltage
- switch
- 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
- 239000002253 acid Substances 0.000 claims description 53
- 238000012544 monitoring process Methods 0.000 claims description 21
- 230000007423 decrease Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- YADSGOSSYOOKMP-UHFFFAOYSA-N dioxolead Chemical compound O=[Pb]=O YADSGOSSYOOKMP-UHFFFAOYSA-N 0.000 description 2
- 230000009365 direct transmission Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910000978 Pb alloy Inorganic materials 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Stand-By Power Supply Arrangements (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は無停電電源装置に関するもので、さらに詳し
く言えばコンピュータや通信機器等のバックアップ電源
として使用される無停電電源装置の信頼性向上と性能向
上とに関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an uninterruptible power supply, and more particularly, to an improvement in reliability and performance of an uninterruptible power supply used as a backup power supply for a computer, a communication device, and the like. It is about.
従来の技術 従来の無停電電源装置は、第３図のように常時は商用
電源１からの交流電力を直送ライン10によってコンピュ
ータや通信機器等の負荷４に供給し、停電時は蓄電池
６′からの直流電力をインバータ３で交流電力に変換し
て該負荷４に供給することにより、停電による負荷４の
トラブルを防止するものである。このような無停電電源
装置における蓄電池６′は、常に商用電源１からの交流
電力を整流器２で整流した直流電力によって浮動充電さ
れて満充電状態が維持されるように構成され、不意の停
電時のバックアップが確実に行われるようにしている。2. Description of the Related Art As shown in FIG. 3, a conventional uninterruptible power supply always supplies AC power from a commercial power supply 1 to a load 4 such as a computer or a communication device through a direct transmission line 10, and from a storage battery 6 'during a power failure. By converting the DC power into AC power by the inverter 3 and supplying the AC power to the load 4, the trouble of the load 4 due to a power failure is prevented. The storage battery 6 'in such an uninterruptible power supply device is configured to be constantly charged by the DC power obtained by rectifying the AC power from the commercial power supply 1 by the rectifier 2 so as to maintain the fully charged state. To ensure that backups are made.
一方、近年はこのような無停電電源装置に対してメン
テナンスフリーの要求や小型化、低価格化の要求が高ま
り、蓄電池６′の密閉化、装置の高実装密度化が急速に
進行してきている。すなわち、蓄電池６′として密閉形
鉛蓄電池６が使用され、この密閉形鉛蓄電池６を含めた
部品が筺体内に高密度に実装されるようになってきてい
る。ところで、密閉形鉛蓄電池６に使用される正極板
は、鉛合金からなる格子体に活物質としての二酸化鉛が
充填されたものであり、充電によって格子体の表面は酸
化腐食されて体積が膨張し、内部応力の発生をもたらし
たり、格子体の強度を低下させる。従って、無停電電源
装置のように浮動充電状態のもとで使用されると、充電
の継続によって格子体はグロースして負極ストラップと
のショート、電槽の破裂、漏液が発生しやすくなる。一
般に、グロースは充電電気量が多いほど大きいが、この
ような高密度に実装された密閉形鉛蓄電池６では電池温
度が高くなるため、充電電気量が多くなって電池温度を
さらに上昇させることになり、上記のような原因で早期
に劣化するという問題があって無停電電源装置の信頼性
が低下するという欠点があった。このため、浮動充電電
圧を温度が高くなるにつれて低下させるという温度補償
回路を設けているものもあるが、その信頼性を向上させ
るために実際になされていることは、密閉形鉛蓄電池６
を２〜３年毎に取り替えていることである。On the other hand, in recent years, there has been an increasing demand for such uninterruptible power supply units to be maintenance-free, compact and inexpensive, and the hermeticity of the storage battery 6 'and the increase in mounting density of the devices have been rapidly advancing. . That is, the sealed lead-acid battery 6 is used as the storage battery 6 ′, and components including the sealed lead-acid battery 6 are being mounted at high density in the housing. By the way, the positive electrode plate used in the sealed lead-acid battery 6 is a grid body made of a lead alloy filled with lead dioxide as an active material, and the surface of the grid body is oxidized and corroded by charging to expand its volume. This causes the generation of internal stress and lowers the strength of the lattice body. Therefore, when used in a floating charging state like an uninterruptible power supply, the grid body grows due to continuation of charging, and short-circuit with the negative electrode strap, rupture of the battery case, and liquid leakage are likely to occur. In general, the growth increases as the amount of charged electricity increases. However, in such a high-density sealed lead-acid battery 6, the battery temperature increases, and thus the amount of charged electricity increases to further increase the battery temperature. Therefore, there is a problem that the above-described cause causes early deterioration and the reliability of the uninterruptible power supply device is reduced. For this reason, some devices are provided with a temperature compensation circuit for lowering the floating charge voltage as the temperature rises. However, what has actually been done to improve the reliability thereof is that a sealed lead-acid battery 6 is used.
Is replaced every two to three years.
発明が解決しようとする課題 上記のような従来の無停電電源装置では、長期間にわ
たって高い信頼性を確保することができないという欠点
があった。Problems to be Solved by the Invention The conventional uninterruptible power supply as described above has a disadvantage that high reliability cannot be ensured for a long period of time.
課題を解決するための手段 本発明は上記欠点を解消するもので、その請求項第１
項記載の発明は、商用電源からの交流電力を整流する整
流器と、この整流器からの直流電力を交流電力に変換す
るインバータと、前記整流器とインバータとの接続点か
らスイッチを介して接続された密閉形鉛蓄電池とからな
り、常時は前記スイッチをオフさせておいて前記商用電
源から直接または整流器とインバータとを介して負荷に
給電し、停電時は前記スイッチをオンさせて前記密閉形
鉛蓄電池からの直流電力を前記インバータで交流電力に
変換して負荷への給電を継続させ、復電後は前記商用電
源からの給電に切り換えるとともに、整流器を介して前
記密閉形鉛蓄電池を充電するようにした無停電電源装置
において、少なくとも前記商用電源電圧をモニターする
機能と、前記スイッチをオンさせた時の密閉形鉛蓄電池
の閉路電圧をモニターする機能と、前記スイッチをオフ
させた時の密閉形鉛蓄電池の開路電圧をモニターする機
能とを有する制御信号発生器を設け、この制御信号発生
器に、常時は前記密閉形鉛蓄電池の開路電圧をモニター
し、この開路電圧が所定値以下に低下した時、前記スイ
ッチをオンさせて前記密閉形鉛蓄電池が充電されるよう
にし、復電後は前記密閉形鉛蓄電池の閉路電圧を検出し
て前記スイッチをオフさせて開路電圧のモニターを開始
するとともに、開路電圧の測定開始時点から開路電圧の
所定値への低下時点までの開路時間をモニターし、この
開路時間に基づいて前記スイッチをオンさせる時間を計
算する機能を設けたことを特徴とする。Means for Solving the Problems The present invention solves the above-mentioned disadvantages.
The invention described in the paragraph is a rectifier for rectifying AC power from a commercial power supply, an inverter for converting DC power from the rectifier to AC power, and a hermetic seal connected from a connection point between the rectifier and the inverter via a switch. The battery is composed of a lead-acid battery, and the switch is turned off at all times, and power is supplied to the load from the commercial power supply directly or through a rectifier and an inverter. DC power was converted to AC power by the inverter to continue power supply to the load, and after power recovery, switching to power supply from the commercial power supply was performed, and the sealed lead-acid battery was charged via a rectifier. In the uninterruptible power supply, at least the function of monitoring the commercial power supply voltage and the monitoring of the closed circuit voltage of the sealed lead-acid battery when the switch is turned on. A control signal generator having a function of monitoring the open circuit voltage of the sealed lead-acid battery when the switch is turned off, and the control signal generator always has a function of opening the closed lead-acid battery. The voltage is monitored, and when the open-circuit voltage falls below a predetermined value, the switch is turned on so that the sealed lead-acid battery is charged.After the power is restored, the closed-circuit voltage of the sealed lead-acid battery is detected. The switch is turned off to start monitoring the open-circuit voltage, and the open-circuit time from the time when the measurement of the open-circuit voltage starts to the time when the open-circuit voltage decreases to a predetermined value is monitored, and the switch is turned on based on the open time. A function for calculating the time to be performed is provided.
また、その請求項第２項記載の発明は、請求項第１項
記載の無停電電源装置において、制御信号発生器に、密
閉形鉛蓄電池の内部抵抗をモニターする機能、密閉形鉛
蓄電池の履歴温度をモニターする機能の少なくとも一方
を設けるとともに、開路電圧のモニター値、内部抵抗の
モニター値、履歴温度のモニター値、開路時間のモニタ
ー値のいずれかが所定値に達したとき、または各モニタ
ー値を組み合わせて演算した結果が所定値であるとき
に、前記密閉形鉛蓄電池が取り替え時期であることを表
示する表示器を設けたことを特徴とするものである。According to a second aspect of the present invention, in the uninterruptible power supply according to the first aspect, the control signal generator has a function of monitoring an internal resistance of the sealed lead-acid battery, and a history of the sealed lead-acid battery. Provide at least one of the temperature monitoring functions, and when any of the open circuit voltage monitor value, internal resistance monitor value, historical temperature monitor value, open circuit time monitor value reaches a predetermined value, or each monitor value And a display for indicating that it is time to replace the sealed lead-acid battery when the result calculated by combining the two is a predetermined value.
作用 上記の如き構成とすることにより、請求項第１項記載
の発明では、密閉形鉛蓄電池は浮動充電状態のもとで待
機することがなくなり、格子体のグロースの発生を少な
くすることができる。According to the first aspect of the present invention, the sealed lead-acid battery does not need to stand by under a floating charge state, and the growth of the grid body can be reduced. .
また、請求項第２項記載の発明では、密閉形鉛蓄電池
を寿命前に取り替えることができるので、無停電電源装
置の信頼性を向上させることができる。According to the second aspect of the present invention, the sealed lead-acid battery can be replaced before the end of its life, so that the reliability of the uninterruptible power supply can be improved.
実施例 以下、実施例により説明する。第１図は本発明の無停
電電源装置のブロック図で、第３図と同一機能を有する
部分には同じ符号を付して以下の説明を省略する。本発
明の特徴は、整流器２とインバータ３との接続点からス
イッチ５を介して密閉形鉛蓄電池６を接続したもので、
商用電源１の電圧をモニターする機能と前記密閉形鉛蓄
電池の開路電圧、閉路電圧をモニターする機能とを有す
る制御信号発生器７を設け、常時は制御信号発生器７か
ら送出される信号によって前記スイッチ５をオフさせて
おいて前記商用電源１から直送ライン10によって負荷４
に給電を行うとともに、密閉形鉛蓄電池６はその開路電
圧がモニターされている。そして、前記制御信号発生器
７によって商用電源１の停電が検出されるか、あるいは
前記密閉形鉛蓄電池６の開路電圧が102V（単電池当り1
2.75V）以下に低下したことが検出されると、制御信号
発生器７から前記スイッチ５をオンさせる信号が送出さ
れ、停電時には前記密閉形鉛蓄電池６からの直流電力が
前記インバータ３で交流電力に変換されて負荷４への給
電を継続させ、開路電圧の低下時には前記整流器２によ
って前記密閉形鉛蓄電池６を充電するように構成されて
いる。この時、密閉形鉛蓄電池６はその閉路電圧がモニ
ターされている。次に、前記制御信号発生器７によって
商用電源１の復電が検出され、商用電源１から負荷４へ
の給電が開始されるとともに、密閉形鉛蓄電池６の充電
が開始され、その閉路電圧が所定値に達したことが検出
されると、制御信号発生器７から前記スイッチ５をオフ
させる信号が送出され、密閉形鉛蓄電池６の開路電圧の
モニターが再開される。この時点から前記制御信号発生
器７は次に開路電圧が102V（単電池当り12.75V）以下に
低下するまでの時間（開路時間）がモニターされ、この
開路時間に基づいてスイッチ５をオンさせる時間が計算
され、開路電圧の低下時にその時間だけ、密閉形鉛蓄電
池６が充電された後スイッチ５をオフさせる機能も備え
ている。このことにより、密閉形鉛蓄電池６の充電が必
要以上に継続することが防止できる。Example Hereinafter, an example will be described. FIG. 1 is a block diagram of an uninterruptible power supply according to the present invention. Parts having the same functions as in FIG. 3 are denoted by the same reference numerals, and the following description is omitted. A feature of the present invention is that a sealed lead-acid battery 6 is connected via a switch 5 from a connection point between the rectifier 2 and the inverter 3.
A control signal generator 7 having a function of monitoring the voltage of the commercial power supply 1 and a function of monitoring the open-circuit voltage and the closed-circuit voltage of the sealed lead-acid battery is provided. With the switch 5 turned off, the load 4
And the open circuit voltage of the sealed lead-acid battery 6 is monitored. Then, the control signal generator 7 detects the power failure of the commercial power supply 1 or the open circuit voltage of the sealed lead-acid battery 6 is 102 V (1 per cell).
When it is detected that the voltage has dropped to 2.75 V or less, a signal for turning on the switch 5 is transmitted from the control signal generator 7. In the event of a power failure, the DC power from the sealed lead-acid battery 6 is converted into AC power by the inverter 3. And the power supply to the load 4 is continued. When the open circuit voltage decreases, the rectifier 2 charges the sealed lead-acid battery 6. At this time, the closed circuit voltage of the sealed lead-acid battery 6 is monitored. Next, the control signal generator 7 detects power recovery of the commercial power supply 1 and starts supplying power to the load 4 from the commercial power supply 1 and starts charging of the sealed lead-acid battery 6. When it is detected that the predetermined value has been reached, a signal for turning off the switch 5 is sent from the control signal generator 7, and the monitoring of the open circuit voltage of the sealed lead-acid battery 6 is resumed. From this point, the control signal generator 7 monitors the time (open time) until the open circuit voltage drops below 102 V (12.75 V per cell), and turns on the switch 5 based on the open time. Is calculated, and when the open-circuit voltage drops, the switch 5 is turned off after the sealed lead-acid battery 6 is charged for that time. This can prevent the charging of the sealed lead-acid battery 6 from continuing more than necessary.
今、上記の如き本発明の無停電電源装置Ａと第３図の
ような従来の無停電電源装置Ｂとを40℃の恒温室に設置
し、６箇月毎に密閉形鉛蓄電池６の10分間率容量を調査
する寿命性能試験を実施したところ、表−１のような結
果が得られた。Now, the uninterruptible power supply A of the present invention as described above and the conventional uninterruptible power supply B as shown in FIG. 3 are installed in a constant temperature room at 40 ° C., and the sealed lead-acid battery 6 is charged every 6 months for 10 minutes. When a life performance test for investigating the specific capacity was performed, the results as shown in Table 1 were obtained.
表−１から、本発明の無停電電源装置Ａの密閉形鉛蓄
電池６は66箇月の試験期間に、約２箇月に１回の割合
で、１回当り約12Ah充電され、合計約400Ah充電された
のに対し、従来の無停電電源装置Ｂの密閉形鉛蓄電池６
には常時平均約30mAの電流が流れ、合計約650Ah充電さ
れて30箇月経過後に寿命となったことがわかり、本発明
の無停電電源装置Ａは長時間にわたって高い信頼性が得
られることがわっかた。 From Table 1, the sealed lead-acid battery 6 of the uninterruptible power supply A of the present invention is charged at a rate of about 12 Ah at a rate of about once every two months during a 66-month test period, for a total of about 400 Ah. In contrast, the sealed lead-acid battery 6 of the conventional uninterruptible power supply B
The average current of about 30 mA always flows through the battery, and it has been found that the battery has been fully charged for about 650 Ah and has reached the end of its service life after 30 months, indicating that the uninterruptible power supply A of the present invention has high reliability over a long period of time. Was.
次に、本発明の他の実施例を第２図により説明する。
第２図の実施例は制御信号発生器７に表示器８を付加
し、開路電圧測定開始時点から該開路電圧の所定値へ低
下時点までの開路時間が所定時間より短かくなった時に
密閉形鉛蓄電池６を取り替えるように表示するようにし
たもので、密閉形鉛蓄電池６の取り替え時期を余裕をも
って表示することができる。すなわち、寿命末期になる
と密閉形鉛蓄電池６は自己放電量が増加して開路時間が
短かくなるためで、無停電電源装置の信頼性向上に寄与
するところが大である。また、この実施例では、制御信
号発生器７に密閉形鉛蓄電池６の内部抵抗モニターする
機能を設け、この内部抵抗が所定値以上になった時に密
閉形鉛蓄電池６を取り替えるように表示器８に表示させ
ることもできる。さらに、制御信号発生器７に密閉形鉛
蓄電池６の履歴温度をモニターする機能を設け、所定値
以上の温度の期間が所定時間以上継続した時に密閉形鉛
蓄電池６を取り替えるように表示器８に表示させること
もできる。なお、密閉形鉛蓄電池６の取り替え時期の表
示は、履歴温度のモニター値、開路時間のモニター値、
内部抵抗のモニター値、開路電圧のモニター値を適宜組
み合わせて演算し、その演算結果によって行うことも可
能である。Next, another embodiment of the present invention will be described with reference to FIG.
In the embodiment shown in FIG. 2, a display 8 is added to the control signal generator 7, and when the open circuit time from the start of the open circuit voltage measurement to the time when the open circuit voltage falls to a predetermined value becomes shorter than a predetermined time, the closed type is closed. Since the lead storage battery 6 is displayed so as to be replaced, the replacement time of the sealed lead storage battery 6 can be displayed with a margin. That is, at the end of life, the self-discharge amount of the sealed lead-acid battery 6 is increased and the open circuit time is shortened, which greatly contributes to the improvement of the reliability of the uninterruptible power supply. In this embodiment, the control signal generator 7 is provided with a function of monitoring the internal resistance of the sealed lead-acid battery 6, and the indicator 8 is designed to replace the sealed lead-acid battery 6 when the internal resistance exceeds a predetermined value. Can also be displayed. Further, the control signal generator 7 is provided with a function of monitoring the hysteresis temperature of the sealed lead-acid battery 6, and the indicator 8 is so replaced as to replace the sealed lead-acid battery 6 when a period of temperature equal to or higher than a predetermined value continues for a predetermined time or longer. It can also be displayed. The display of the replacement time of the sealed lead-acid battery 6 is indicated by the monitor value of the history temperature, the monitor value of the open circuit time,
It is also possible to calculate by appropriately combining the monitor value of the internal resistance and the monitor value of the open circuit voltage, and to perform the calculation based on the calculation result.
上記した実施例は直送ライン10を用いた常時商用給電
方式のもので説明したが、直送ライン10をインバータ３
の故障時のバックアップ用として用いる常時インバータ
給電方式のものでも適用できることは言うまでもない。In the above-described embodiment, the continuous commercial power supply system using the direct transmission line 10 has been described.
It is needless to say that a constant inverter power supply type used as a backup for a failure can be applied.
発明の効果 実施例において詳述した如く、本発明の無停電電源装
置は、密閉形鉛蓄電池を常時開放状態で待機させるとと
もに、その開路電圧をモニターし、開路電圧が所定値以
下に低下した時、開路時間に基づいて計算された時間だ
けスイッチをオンさせて密閉形鉛蓄電池を充電するよう
にしているから、充電が継続することによる密閉形鉛蓄
電池６の早期の劣化を防止することができる。また、制
御信号発生器に設けた密閉形鉛蓄電池の開路電圧のモニ
ター機能、内部抵抗のモニター機能、履歴温度のモニタ
ー機能、閉路電圧のモニター機能を、単独もしくは組み
合わせて表示器に密閉形鉛蓄電池の取り替え時期を表示
することにより、無停電電源装置の信頼性向上を図るこ
とができる。Effect of the Invention As described in detail in the embodiment, the uninterruptible power supply of the present invention keeps the sealed lead-acid battery in the always open state and monitors the open circuit voltage, and when the open circuit voltage falls below the predetermined value. Since the switch is turned on for the time calculated based on the opening time to charge the sealed lead-acid battery, it is possible to prevent early deterioration of the sealed lead-acid battery 6 due to continuous charging. . In addition, the sealed lead-acid battery provided on the control signal generator has a function of monitoring the open-circuit voltage of the sealed lead-acid battery, a function of monitoring the internal resistance, a function of monitoring the hysteresis temperature, and a function of monitoring the closed-circuit voltage. By displaying the replacement time, the reliability of the uninterruptible power supply can be improved.
第１図は本発明の一実施例の無停電電源装置のブロック
図、第２図は本発明の他の実施例の無停電電源装置のブ
ロック図、第３図は従来の無停電電源装置のブロック図
である。 １……商用電源、２……整流器 ３……インバータ、４……負荷 ５……スイッチ、６……密閉形鉛蓄電池 ７……制御信号発生器、８……表示器FIG. 1 is a block diagram of an uninterruptible power supply according to one embodiment of the present invention, FIG. 2 is a block diagram of an uninterruptible power supply according to another embodiment of the present invention, and FIG. It is a block diagram. DESCRIPTION OF SYMBOLS 1 ... Commercial power supply 2 ... Rectifier 3 ... Inverter 4 ... Load 5 ... Switch 6 ... Sealed lead-acid battery 7 ... Control signal generator 8 ... Display
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−70241（ＪＰ，Ａ) 特開 昭55−131234（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) H02J 9/00 - 9/06 H02J 7/34──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-70241 (JP, A) JP-A-55-131234 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) H02J 9/00-9/06 H02J 7/34
Claims (2)
と、この整流器からの直流電力を交流電力に変換するイ
ンバータと、前記整流器とインバータとの接続点からス
イッチを介して接続された密閉形鉛蓄電池とからなり、
常時は前記スイッチをオフさせておいて前記商用電源か
ら直接または整流器とインバータとを介して負荷に給電
し、停電時は前記スイッチをオンさせて前記密閉形鉛蓄
電池からの直流電力を前記インバータで交流電力に変換
して負荷への給電を継続させ、復電後は前記商用電源か
らの給電に切り換えるとともに、整流器を介して前記密
閉形鉛蓄電池を充電するようにした無停電電源装置にお
いて、少なくとも前記商用電源電圧をモニターする機能
と、前記スイッチをオンさせた時の密閉形鉛蓄電池の閉
路電圧をモニターする機能と、前記スイッチをオフさせ
た時の密閉形鉛蓄電池の開路電圧をモニターする機能と
を有する制御信号発生器を設け、この制御信号発生器
に、常時は前記密閉形鉛蓄電池の開路電圧をモニター
し、この開路電圧が所定値以下に低下した時、前記スイ
ッチをオンさせて前記密閉形鉛蓄電池が充電されるよう
にし、復電後は前記密閉形鉛蓄電池の閉路電圧を検出し
て前記スイッチをオフさせて開路電圧のモニターを開始
するとともに、開路電圧の測定開始時点から開路電圧の
所定値への低下時点までの開路時間をモニターし、この
開路時間に基づいて前記スイッチをオンさせる時間を計
算する機能を設けたことを特徴とする無停電電源装置。A rectifier for rectifying AC power from a commercial power supply, an inverter for converting DC power from the rectifier into AC power, and a sealed type connected via a switch from a connection point between the rectifier and the inverter. Consisting of lead-acid batteries,
Normally, the switch is turned off and power is supplied to the load directly from the commercial power supply or via a rectifier and an inverter.At the time of a power failure, the switch is turned on to supply DC power from the sealed lead storage battery to the inverter. In the uninterruptible power supply device, which is converted into AC power and continues to supply power to the load, and after restoration of power, switches to power supply from the commercial power supply and charges the sealed lead-acid battery via a rectifier. A function of monitoring the commercial power supply voltage, a function of monitoring the closed-circuit voltage of the sealed lead-acid battery when the switch is turned on, and a function of monitoring an open-circuit voltage of the sealed lead-acid battery when the switch is turned off A control signal generator having the following features: the control signal generator constantly monitors the open-circuit voltage of the sealed lead-acid battery; When the value falls below the value, the switch is turned on so that the sealed lead-acid battery is charged, and after the power is restored, the closed-circuit voltage of the sealed lead-acid battery is detected and the switch is turned off to open the open-circuit voltage. A function to start monitoring and to monitor an open circuit time from a start time of the measurement of the open circuit voltage to a time point at which the open circuit voltage decreases to a predetermined value, and to calculate a time for turning on the switch based on the open time. Uninterruptible power supply.
抵抗をモニターする機能、密閉形鉛蓄電池の履歴温度を
モニターする機能の少なくとも一方を設けるとともに、
開路電圧のモニター値、内部抵抗のモニター値、履歴温
度のモニター値、開路時間のモニター値のいずれかが所
定値に達したとき、または各モニター値を組み合わせて
演算した結果が所定値であるときに、前記密閉形鉛蓄電
池が取り替え時期であることを表示する表示器を設けた
ことを特徴とする請求項第１項記載の無停電電源装置。A control signal generator having at least one of a function of monitoring an internal resistance of the sealed lead-acid battery and a function of monitoring a hysteresis temperature of the sealed lead-acid battery;
When any of the open circuit voltage monitor value, the internal resistance monitor value, the history temperature monitor value, and the open circuit time monitor value reaches a predetermined value, or when the result obtained by combining the monitor values is a predetermined value 2. The uninterruptible power supply according to claim 1, further comprising an indicator for indicating that it is time to replace the sealed lead-acid battery.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2303369A JP2844906B2 (en) | 1990-11-07 | 1990-11-07 | Uninterruptible power system |
| US07/788,512 US5229650A (en) | 1990-11-07 | 1991-11-06 | Uniterruptible power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2303369A JP2844906B2 (en) | 1990-11-07 | 1990-11-07 | Uninterruptible power system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04178126A JPH04178126A (en) | 1992-06-25 |
| JP2844906B2 true JP2844906B2 (en) | 1999-01-13 |
Family
ID=17920169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2303369A Expired - Fee Related JP2844906B2 (en) | 1990-11-07 | 1990-11-07 | Uninterruptible power system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2844906B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2836286B2 (en) * | 1991-04-22 | 1998-12-14 | 株式会社ユアサコーポレーション | Uninterruptible power system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55131234A (en) * | 1979-03-28 | 1980-10-11 | Japan Storage Battery Co Ltd | Dc power supply unit |
| JPH0270241A (en) * | 1988-09-02 | 1990-03-09 | Fuji Electric Co Ltd | Uninterruptive power supply |
-
1990
- 1990-11-07 JP JP2303369A patent/JP2844906B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04178126A (en) | 1992-06-25 |
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