JPH01136537A - Power supply - Google Patents
Power supplyInfo
- Publication number
- JPH01136537A JPH01136537A JP62292503A JP29250387A JPH01136537A JP H01136537 A JPH01136537 A JP H01136537A JP 62292503 A JP62292503 A JP 62292503A JP 29250387 A JP29250387 A JP 29250387A JP H01136537 A JPH01136537 A JP H01136537A
- Authority
- JP
- Japan
- Prior art keywords
- detection circuit
- nfb
- power
- power supply
- power failure
- 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
Landscapes
- Stand-By Power Supply Arrangements (AREA)
- Rectifiers (AREA)
Abstract
Description
【発明の詳細な説明】
〔概要〕
電源装置の遮断特性の改良に関し、
ゆるやかに低下若しくは回復する電圧変化に対して電源
装置を安定に動作させることを目的とし、変成器の一次
側に設けた停電検出回路の停電検出電圧レベルの設定値
を、変成器を一次側にて交流電源から切離すノーフユー
ズブレーカの変成器二次側に設けたＮＰＢ検出回路の検
出レベルよりも高い値となるように構成する。[Detailed Description of the Invention] [Summary] Regarding the improvement of the cut-off characteristics of a power supply device, the present invention aims to stably operate the power supply device against voltage changes that gradually drop or recover. The set value of the power failure detection voltage level of the power failure detection circuit is set to a value higher than the detection level of the NPB detection circuit installed on the secondary side of the transformer of the no-use breaker that disconnects the transformer from the AC power supply on the primary side. Configure it as follows.
本発明は電源装置の改良に関する。 The present invention relates to improvements in power supply devices.
入力交流電流を整流し、直流電流を供給する電源装置は
、入力停電の場合、常時充電される蓄電池から直流電流
を負荷へ安定に供給出来ることが望ましい。A power supply device that rectifies input alternating current and supplies direct current is desirably capable of stably supplying direct current to a load from a constantly charged storage battery in the event of an input power outage.
従来、電源装置は入力の停電とブレーカオフの検出識別
の二つのシーケンスを経て負荷側に蓄電池を接続させて
いる。第４図はこのような電源装置の回路図を示してい
る。Conventionally, a power supply device connects a storage battery to the load side through two sequences: input power failure and breaker off detection/identification. FIG. 4 shows a circuit diagram of such a power supply device.
図において、交流１００ｖの電源は過電流保護用のノー
フユーズブレーカＮＦＢ １を介し、変成器３の一次側
捲線に接続され、変成器３の二次側捲線は整流器を含む
負荷回路８へ接続される。In the figure, an AC 100V power supply is connected to the primary winding of a transformer 3 via a no-use breaker NFB 1 for overcurrent protection, and the secondary winding of the transformer 3 is connected to a load circuit 8 including a rectifier. be done.
また、変成器３の二次側にはヂャージャ−４が設けられ
、蓄電池６を充電する。Further, a charger 4 is provided on the secondary side of the transformer 3 to charge a storage battery 6.
蓄電池６はスイッチ回路７により負荷への接続が制御さ
れる。この制御は入力交流電流の整流直流電圧値の低下
を検出する停電検出回路２と、絶縁変成器３の二次側の
整流直流電圧値の低下を検出しＮＦＢ １のオン・オフ
状態を検出する検出回路５との検出値の論理積により行
われる。Connection of the storage battery 6 to the load is controlled by a switch circuit 7. This control includes a power outage detection circuit 2 that detects a drop in the rectified DC voltage value of the input AC current, and a power failure detection circuit 2 that detects a drop in the rectified DC voltage value on the secondary side of the isolation transformer 3 to detect the on/off state of the NFB 1. This is performed by ANDing the detected value with the detection circuit 5.
即ち、停電検出回路２は入力交流電圧が一定電圧値以下
になるとリレーを動作させ停電検出信号を出力する。That is, the power failure detection circuit 2 operates a relay and outputs a power failure detection signal when the input AC voltage becomes below a certain voltage value.
また、停電もしくは入力電圧低下時、変成器３の二次側
電圧は必然的に低下する。検出回路５は検出電圧が一定
値以下になったときリレーを動作し検出信号を送出する
。Furthermore, when a power outage or input voltage drops, the secondary voltage of the transformer 3 inevitably drops. The detection circuit 5 operates a relay and sends out a detection signal when the detection voltage becomes below a certain value.
入力交流電圧異常時、停電検出回路２と検出回路５との
リレー動作により、蓄電池６がスイッチ回路７により負
荷へ接続し、直流電流を供給する。When the input AC voltage is abnormal, the relay operation of the power failure detection circuit 2 and the detection circuit 5 connects the storage battery 6 to the load via the switch circuit 7 and supplies DC current.
ノーフユーズブレーカＮＦＢ １は過大電流が負荷へ流
れる様な場合に動作し、変成器３の入力を切断する。従
って、検出回路５は変成器３の二次側電圧の低下を検出
し、その値が一定値以下になるとリレーを動作し検出信
号を送出する。しかし、停電検出回路２が停電を検出し
ていないことにより、スイッチ回路７は蓄電池６を負荷
回路へ接続しない。The no-use breaker NFB 1 operates when an excessive current flows to the load and cuts off the input of the transformer 3. Therefore, the detection circuit 5 detects a drop in the secondary voltage of the transformer 3, and when the value falls below a certain value, it operates a relay and sends out a detection signal. However, since the power outage detection circuit 2 has not detected a power outage, the switch circuit 7 does not connect the storage battery 6 to the load circuit.
ここで、停電検出は電圧の有無を検出するので、停電検
出回路２の検出動作点は比較的低い入力電圧値に設定さ
れる。Here, since the power failure detection detects the presence or absence of voltage, the detection operating point of the power failure detection circuit 2 is set to a relatively low input voltage value.
また、検出回路５の電圧検出動作点は停電検出回路２の
検出動作点よりも高い値に設定する。Further, the voltage detection operating point of the detection circuit 5 is set to a higher value than the detection operating point of the power failure detection circuit 2.
上記のような構成の場合、入力電圧が緩徐に降下する様
な停電の場合、その動作特性は第５図に示すようになる
。In the case of the above configuration, in the case of a power outage in which the input voltage gradually drops, the operating characteristics are as shown in FIG. 5.
図において、縦軸は電圧、横軸は時間を示す。In the figure, the vertical axis shows voltage and the horizontal axis shows time.
停電時入力電圧ａは徐々に低下し時刻Ｌ１にＮＦＢオン
・オフの検出Ｃがなされ、時刻ｔ２において停電検出す
が行われる。The input voltage a at the time of power failure gradually decreases, and NFB on/off detection C is performed at time L1, and power failure detection is performed at time t2.
入力電圧がゆっくり低下するとリレー動作のバラツキ等
により停電になったにも係わらず、Ｌ１〜ｔ２の間にお
いてＮＰＢオフ（２次側の電圧低下）を検出して蓄電池
が接続されないという問題がある。If the input voltage slowly decreases, there is a problem that even though there is a power outage due to variations in relay operation, NPB off (lower voltage on the secondary side) is detected between L1 and t2 and the storage battery is not connected.
また、ゆっくり停電が回復する時にも停電が回復したに
かかわらず、ＮＦＢオフ（２次側の電圧低下）を検出し
、蓄電池を遮断するという問題がある。Furthermore, even when the power outage slowly recovers, there is a problem in that NFB off (lower voltage on the secondary side) is detected and the storage battery is shut off, regardless of whether the power outage has been recovered.
上記の問題点は、第１図の本発明の原理図に示す様に、
変成器１３の一次側に設けた停電検出回路１２の停電検
出電圧レベルの設定値を、変成器１３を一次側にて交流
電源から切離すノーヒユーズブレーカＮＦＢ １１の、
変成器二次側に設けたＮＦＢ検出回路１５の検出レベル
よりも高い値となるように構成した本発明の電源装置に
よって解決される。The above problems are solved as shown in the principle diagram of the present invention in FIG.
The set value of the power failure detection voltage level of the power failure detection circuit 12 provided on the primary side of the transformer 13 is set by the no-fuse breaker NFB 11 that disconnects the transformer 13 from the AC power supply on the primary side.
This problem is solved by the power supply device of the present invention configured so that the detection level is higher than the detection level of the NFB detection circuit 15 provided on the secondary side of the transformer.
本発明によれば、停電検出回路１２の停電検出電圧レベ
ルをＮＦＢ検出回路１５の検出レベルよりも高い値とな
るように構成することにより第２図に示すように、入力
電圧ａの電圧変化が如何にゆっくりと低下し、また回復
した場合でも、誤ったＮＦＢオフの認識をすることがな
く、動作の安定した電源装置が提供される。According to the present invention, by configuring the power failure detection voltage level of the power failure detection circuit 12 to be a higher value than the detection level of the NFB detection circuit 15, as shown in FIG. No matter how slowly the NFB decreases and recovers, a power supply device with stable operation is provided without erroneously recognizing that the NFB is turned off.
図示実施例に従い、本発明を説明する。 The present invention will be explained according to the illustrated embodiments.
第３図は本発明一実施例の電源装置の回路図である。FIG. 3 is a circuit diagram of a power supply device according to an embodiment of the present invention.
本発明によれば、停電検出回路２２とＮＦＢ検出回路２
５はそれぞれ基準電圧Ｅｌ、Ｅ２を備え、基準電圧は停
電検出点がＮＦＢ検出レヘしベりも高い電圧となるよう
に選定される。According to the present invention, the power failure detection circuit 22 and the NFB detection circuit 2
5 are provided with reference voltages El and E2, respectively, and the reference voltages are selected so that the power failure detection point has a voltage that is also high in the NFB detection level.
２９は制御回路であり、停電検出回路２２とＮＦＢ検出
回路２５のリレーの動作によって働き、停電とＮＦＢオ
フを検出したとき蓄電池２６のスイッチ２７を制御する
。Reference numeral 29 denotes a control circuit, which operates by the operation of the relays of the power failure detection circuit 22 and the NFB detection circuit 25, and controls the switch 27 of the storage battery 26 when a power failure and NFB off are detected.
本発明によれば、ゆるやかに低下若しくは回復する電圧
変化に対する電源装置の動作を安定化し、停電時負荷へ
の蓄電池の接続若しくは遮断を正しく行なうことが出来
、その作用効果は極めて大きい。According to the present invention, it is possible to stabilize the operation of the power supply device against voltage changes that gradually decrease or recover, and to correctly connect or disconnect the storage battery to the load during a power outage, and its effects are extremely large.
第１図は本発明の原理図、
第２図は本発明一実施例の検出回路の動作特性図、
第３図は本発明一実施例の電源装置の回路図、第４図は
従来の電源装置の回路図、
第５図は従来の検出回路の動作特性図である。
図において、
１．１１．２１はＮＦＢ、
２．１２．２２は停電検出回路、
３．１３．２３は変成器、
４．１４．２４はチャージャー、
５．１５．２５はＮＦＢ検出回路、
６．１６．２６は蓄電池、
７．１７．２７はスイッチ、
８．１８．２８は負荷回路、
２９．１９は制御回路、
Ｅｌ、 Ｅ２は基準電圧である。Fig. 1 is a principle diagram of the present invention, Fig. 2 is an operational characteristic diagram of a detection circuit according to an embodiment of the present invention, Fig. 3 is a circuit diagram of a power supply device according to an embodiment of the present invention, and Fig. 4 is a conventional power supply. FIG. 5 is a diagram showing the operating characteristics of a conventional detection circuit. In the figure, 1.11.21 is NFB, 2.12.22 is a power failure detection circuit, 3.13.23 is a transformer, 4.14.24 is a charger, 5.15.25 is an NFB detection circuit, 6. 16.26 is a storage battery, 7.17.27 is a switch, 8.18.28 is a load circuit, 29.19 is a control circuit, and El and E2 are reference voltages.
Claims (1)
の停電検出電圧レベルの設定値を、変成器（１３）を一
次側にて交流電源から切離すノーヒューズブレーカＮＦ
Ｂ（１１）の変成器二次側に設けたＮＦＢ検出回路（１
５）の検出レベルよりも高い値となるように構成したこ
とを特徴とする電源装置。Power failure detection circuit (12) installed on the primary side of the transformer (13)
A no-fuse breaker NF that disconnects the transformer (13) from the AC power supply on the primary side sets the power failure detection voltage level setting value of
NFB detection circuit (1) installed on the secondary side of the transformer B (11)
5) A power supply device configured to have a higher value than the detection level of item 5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62292503A JPH01136537A (en) | 1987-11-19 | 1987-11-19 | Power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62292503A JPH01136537A (en) | 1987-11-19 | 1987-11-19 | Power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01136537A true JPH01136537A (en) | 1989-05-29 |
Family
ID=17782658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62292503A Pending JPH01136537A (en) | 1987-11-19 | 1987-11-19 | Power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01136537A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6008629A (en) * | 1994-09-01 | 1999-12-28 | Fujitsu Limited | Charging-and-discharging device for an electronic apparatus, and an electronic apparatus including the same, utilizing a charging device providing a constant charging current |
-
1987
- 1987-11-19 JP JP62292503A patent/JPH01136537A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6008629A (en) * | 1994-09-01 | 1999-12-28 | Fujitsu Limited | Charging-and-discharging device for an electronic apparatus, and an electronic apparatus including the same, utilizing a charging device providing a constant charging current |
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