JP2000102195A - Uninterruptible power supply - Google Patents
Uninterruptible power supplyInfo
- Publication number
- JP2000102195A JP2000102195A JP10271777A JP27177798A JP2000102195A JP 2000102195 A JP2000102195 A JP 2000102195A JP 10271777 A JP10271777 A JP 10271777A JP 27177798 A JP27177798 A JP 27177798A JP 2000102195 A JP2000102195 A JP 2000102195A
- Authority
- JP
- Japan
- Prior art keywords
- booster circuit
- power
- voltage
- circuit
- output
- 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.)
- Granted
Links
Landscapes
- Stand-By Power Supply Arrangements (AREA)
- Dc-Dc Converters (AREA)
- Inverter Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は商用電力を受電中
はその商用電力を負荷へ供給すると共に充電器で蓄電池
に充電し、停電になると、蓄電池の電力を昇圧回路で昇
圧し、その昇圧出力をインバータで交流電力に変換し、
その交流電力を負荷へ供給する無停電電源装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supplies commercial power to a load while receiving commercial power, and charges a storage battery with a charger. When a power failure occurs, the power of the storage battery is boosted by a booster circuit, and the boosted output thereof is output. Is converted to AC power by the inverter,
The present invention relates to an uninterruptible power supply for supplying the AC power to a load.
【０００２】[0002]
【従来の技術】図５に従来の無停電電源装置を示す。商
用電源１１からの商用電力は出力切替リレー１２を介し
て負荷１３へ供給される。また充電器１４により商用電
力が蓄電池１５に対し充電している。停電になると、停
電検出制御部１６で停電を検出し、出力切替リレー１２
をインバータ１７側に切替え、また昇圧回路１８、イン
バータ１７を起動する。蓄電池１５よりの例えば３６〜
６０Ｖの電力が昇圧回路１８で例えば１６５Ｖに昇圧さ
れ、その１６５Ｖの直流電力がインバータ１７で１００
Ｖの交流電力に変換され、その交流電力が出力切替リレ
ー１２を通じて負荷１３へ供給される。2. Description of the Related Art FIG. 5 shows a conventional uninterruptible power supply. Commercial power from a commercial power supply 11 is supplied to a load 13 via an output switching relay 12. In addition, the commercial power is charging the storage battery 15 by the charger 14. When a power failure occurs, the power failure detection control unit 16 detects the power failure and outputs
Is switched to the inverter 17 side, and the booster circuit 18 and the inverter 17 are activated. For example, 36-
The 60 V power is boosted to, for example, 165 V by the booster circuit 18, and the 165 V DC power is
V is converted to AC power, and the AC power is supplied to the load 13 through the output switching relay 12.
【０００３】[0003]
【発明が解決しようとする課題】停電になった時に、切
替リレー１２が切替られるのは４〜８ミリ秒程度で行わ
れる。一方、蓄電池１５の電圧は３６〜６０Ｖ程度であ
り、商用電力が負荷１３に供給されている状態では、昇
圧回路１８の出力側の電圧は蓄電池１５の出力電圧と同
程度になっている。停電になって昇圧回路１８、インバ
ータ１７が起動され、負荷１３に１００Ｖの交流電力を
供給するには、昇圧回路１８の出力電圧が１６５Ｖ程度
になる必要がある。つまり、昇圧回路１８の出力電圧は
３６〜６０Ｖから１６５Ｖに高められる必要があるが、
図６Ａの破線で示すようにこの昇圧に８ミリ秒以上の時
間がかかった。このため従来は停電になり、インバータ
１７の出力が負荷１３へ供給されるようになった当初は
図６Ｂの破線で示すように、１００Ｖ以下の交流電力が
負荷１３に供給されるという問題があった。When a power failure occurs, switching of the switching relay 12 is performed in about 4 to 8 milliseconds. On the other hand, the voltage of the storage battery 15 is about 36 to 60 V, and the voltage on the output side of the booster circuit 18 is substantially the same as the output voltage of the storage battery 15 when the commercial power is supplied to the load 13. In the event of a power failure, the booster circuit 18 and the inverter 17 are started, and in order to supply 100 V AC power to the load 13, the output voltage of the booster circuit 18 needs to be about 165V. That is, the output voltage of the booster circuit 18 needs to be increased from 36 to 60 V to 165 V,
As shown by the broken line in FIG. 6A, this step-up took more than 8 milliseconds. For this reason, in the related art, a power outage occurs, and the output of the inverter 17 is supplied to the load 13 at the beginning, as shown by a broken line in FIG. Was.
【０００４】[0004]
【課題を解決するための手段】この発明によれば商用電
力受電中に、昇圧回路の出力側を、蓄電池の電圧よりも
高い電圧に保持する手段が設けられる。この構成によ
り、停電になった時に、昇圧回路の出力電圧が、従来よ
りも短時間で所定の電圧になり、停電時に、インバータ
出力電圧として、切替え当初から所要のものが得られ
る。According to the present invention, there is provided means for maintaining the output side of the booster circuit at a voltage higher than the voltage of the storage battery during receiving commercial power. With this configuration, when a power failure occurs, the output voltage of the booster circuit becomes a predetermined voltage in a shorter time than before, and at the time of the power failure, a required inverter output voltage is obtained from the beginning of the switching.
【０００５】[0005]
【発明の実施の形態】図１にこの発明の第１実施例を示
し、図５と対応する部分に同一符号を付けてある。充電
器１４において、商用電力は整流器２０で整流されてコ
ンデンサ２１に充電され、その充電電力はトランス２
２、スイッチングトランジスタ２３、整流用ダイオード
２４、コンデンサ２５により、所定の直流電圧に変換さ
れ、その直流電圧で蓄電池１５に対する充電が行われ
る。スイッチングトランジスタ２３は充電制御部２６に
よりスイッチング制御が行われる。FIG. 1 shows a first embodiment of the present invention, in which parts corresponding to those in FIG. 5 are denoted by the same reference numerals. In the charger 14, the commercial power is rectified by the rectifier 20 and charged in the capacitor 21, and the charged power is
2. The DC voltage is converted into a predetermined DC voltage by the switching transistor 23, the rectifying diode 24, and the capacitor 25, and the storage battery 15 is charged with the DC voltage. The switching control of the switching transistor 23 is performed by the charge control unit 26.
【０００６】昇圧回路１８では蓄電池１５の出力がコン
デンサ２８に充電され、コンデンサ２８と並列に、イン
ダクタ２９とスイッチングトランジスタ３１の直列回路
が接続され、スイッチングトランジスタ３１と並列に、
整流用ダイオード３２を通じてコンデンサ３３が接続さ
れ、トランジスタ３１は駆動回路３４によりスイッチン
グ制御される。コンデンサ２８の電力が昇圧されてコン
デンサ３３に充電される。昇圧回路１８はＤＣ−ＤＣコ
ンバータである。In the booster circuit 18, the output of the storage battery 15 is charged in the capacitor 28, and a series circuit of an inductor 29 and a switching transistor 31 is connected in parallel with the capacitor 28.
A capacitor 33 is connected through a rectifying diode 32, and the transistor 31 is controlled by a driving circuit 34 for switching. The power of the capacitor 28 is boosted and the capacitor 33 is charged. The booster circuit 18 is a DC-DC converter.
【０００７】昇圧回路１８のコンデンサ３３の両端間の
電力は、インバータ１７へ供給される。インバータ１７
は駆動回路３５により各スイッチング素子が制御され
る。商用電力は停電検出回路１６ａに分岐供給され、停
電が検出されると、その検出出力が制御部１６ｂへ供給
され、また出力切替リレー１２へ供給され、その切替え
が制御される。制御部１６ｂは駆動回路３４，３５に対
し、起動指令を出す。図に示していないが、停電中に昇
圧回路１８の出力電圧を、またインバータ１７の出力電
圧をそれぞれ一定値に保持する制御手段が設けられてい
る。The power between both ends of the capacitor 33 of the booster circuit 18 is supplied to the inverter 17. Inverter 17
Each switching element is controlled by the drive circuit 35. The commercial power is branched and supplied to the power failure detection circuit 16a, and when a power failure is detected, the detected output is supplied to the control unit 16b and also supplied to the output switching relay 12, and the switching is controlled. The control unit 16b issues a start command to the drive circuits 34 and 35. Although not shown in the figure, a control means is provided for holding the output voltage of the booster circuit 18 and the output voltage of the inverter 17 at constant values during a power failure.
【０００８】この実施例では充電器１４のトランス２２
の２次巻線に、３次巻線４１が巻き上げられ、その３次
巻線４１の巻き上げ端が整流用ダイオード４２を通じ
て、ダイオード３２とコンデンサ３３の接続点に接続さ
れる。トランス２２の３次巻線４１と整流用ダイオード
４２によって補助昇圧回路が構成される。この構成によ
り、商用電力を受電中は、ダイオード４２を通じて、コ
ンデンサ３３に対する充電が行われ、コンデンサ３３
は、蓄電池１５の出力電圧、つまり例えば３０〜６０Ｖ
より高い、例えば１３０Ｖに保持される。In this embodiment, the transformer 22 of the charger 14 is
A tertiary winding 41 is wound around the secondary winding, and a winding end of the tertiary winding 41 is connected to a connection point between the diode 32 and the capacitor 33 through the rectifying diode 42. An auxiliary booster circuit is configured by the tertiary winding 41 of the transformer 22 and the rectifying diode 42. With this configuration, while commercial power is being received, the capacitor 33 is charged through the diode 42, and the capacitor 33 is charged.
Is the output voltage of the storage battery 15, that is, for example, 30 to 60 V
It is kept higher, for example at 130V.
【０００９】この状態で停電になると、昇圧回路１８の
出力は１３０Ｖから上昇を開始するため、図６Ａの実線
に示すように、短時間で規格値１６５Ｖになる。従っ
て、負荷１３がインバータ１７側に切替わった時には、
図６Ｂに実線で示すように、負荷１３には１００Ｖの交
流電力が供給される。なお昇圧回路１８が昇圧動作中に
おいて、ダイオード４２により、コンデンサ３３の負荷
が充電器１４側に流れるおそれはない。この実施例では
補助昇圧回路の３次巻線４１としてトランス２２の２次
巻線に直接接続されたものを用いたが、２次巻線に直接
接続されない３次巻線（補助巻線）４１を用いても良
い。When a power failure occurs in this state, the output of the booster circuit 18 starts to rise from 130 V, and thus reaches the standard value of 165 V in a short time as shown by the solid line in FIG. 6A. Therefore, when the load 13 is switched to the inverter 17 side,
As shown by the solid line in FIG. 6B, 100 V AC power is supplied to the load 13. Note that there is no possibility that the load of the capacitor 33 flows to the charger 14 side by the diode 42 during the boosting operation of the booster circuit 18. In this embodiment, a tertiary winding (auxiliary winding) 41 not directly connected to the secondary winding is used as the tertiary winding 41 of the auxiliary booster circuit, which is directly connected to the secondary winding of the transformer 22. May be used.
【００１０】この発明の第２の実施例では図２に図１と
対応する部分に同一符号を付けて示すように昇圧回路１
８の出力電圧が、間欠制御部４３へ分圧回路４４を通じ
て分岐印加される。間欠制御部４３では非停電中におい
て、昇圧回路１８の出力電圧が例えば前記１３０Ｖ（第
１基準電圧値）以下になると、これを検出して駆動回路
３４を起動し、昇圧回路１８を動作させ、昇圧回路１８
の出力電圧が規格値、前記例では１６５Ｖ（第２基準電
圧値）を超えると、これを検出して、駆動回路３４の動
作を停止し、昇圧回路１８の動作を停止する。In a second embodiment of the present invention, as shown in FIG. 2, portions corresponding to those in FIG.
8 is applied to the intermittent control unit 43 through the voltage dividing circuit 44. If the output voltage of the booster circuit 18 becomes equal to or lower than, for example, 130 V (first reference voltage value) during a non-power failure, the intermittent control unit 43 detects this and activates the drive circuit 34 to operate the booster circuit 18. Step-up circuit 18
When the output voltage exceeds the standard value, 165 V (second reference voltage value) in the above example, this is detected, the operation of the drive circuit 34 is stopped, and the operation of the booster circuit 18 is stopped.
【００１１】この構成により、商用電力を受電中は、昇
圧回路１８の出力は１３０〜１６５Ｖに保持される。従
って、停電になった時に、従来よりも短時間で昇圧回路
１８の出力電圧は規格値になり、負荷１３がインバータ
１７側に切替わった当初から、１００Ｖの交流電力が負
荷１３に供給される。図３にこの発明の第３の実施例を
示す。この図では図２中の間欠制御部４３と分圧回路４
４を省略して、周期的制御部４５を設けた場合である。
つまり、昇圧回路１８の出力低下（１６５Ｖ→１３０
Ｖ）に要する時間と、昇圧回路１８の起動により出力が
回復する（１３０Ｖ→１６５Ｖ）時間とが分かっていれ
ば、それらを休止時間、起動時間として設定したタイマ
ー回路を有する周期的制御部４５により昇圧回路１８を
周期的に駆動させたのがこの第３の実施例である。With this configuration, the output of the booster circuit 18 is maintained at 130 to 165 V during receiving commercial power. Therefore, when a power failure occurs, the output voltage of the booster circuit 18 becomes a standard value in a shorter time than in the conventional case, and 100 V AC power is supplied to the load 13 from the beginning when the load 13 is switched to the inverter 17 side. . FIG. 3 shows a third embodiment of the present invention. In this figure, the intermittent control unit 43 and the voltage dividing circuit 4 in FIG.
4 is omitted and a periodic control unit 45 is provided.
That is, the output of the booster circuit 18 decreases (165 V → 130
If the time required for V) and the time for the output to recover (130 V → 165 V) by the activation of the booster circuit 18 are known, the periodic control unit 45 having a timer circuit that sets these as a pause time and a start time is provided. In the third embodiment, the booster circuit 18 is periodically driven.
【００１２】また、第１の実施例と第２の実施例又は第
３の実施例を合成して使用することも可能であり、その
前者の例を図４に図１、図２と対応する部分に同一符号
を付けて示し、説明は省略する。It is also possible to combine the first embodiment and the second or third embodiment and use them, and the former example is shown in FIG. 4 corresponding to FIG. 1 and FIG. The same reference numerals are given to the portions, and the description is omitted.
【００１３】[0013]
【発明の効果】以上述べたように、この発明によれば、
商用電力を受電中に、昇圧回路１８の出力側が、蓄電池
１５の電圧より高い電圧、つまり昇圧回路１８の出力電
圧の規格値例えば１６５Ｖに比較的近い電圧になってい
るため、停電になり、負荷１３がインバータ１７側に切
替わる短時間の間に、昇圧回路１８の出力電圧が規格値
となり、１００Ｖの交流電力がインバータ１７から負荷
１３に、切替わった初めから供給される。As described above, according to the present invention,
During the reception of the commercial power, the output side of the booster circuit 18 has a voltage higher than the voltage of the storage battery 15, that is, a voltage relatively close to the standard value of the output voltage of the booster circuit 18, for example, 165V. During a short time when the switch 13 is switched to the inverter 17 side, the output voltage of the booster circuit 18 becomes the standard value, and 100 V AC power is supplied from the inverter 17 to the load 13 from the beginning of the switch.
【図１】この発明の第１の実施例を示す図。FIG. 1 is a diagram showing a first embodiment of the present invention.
【図２】この発明の第２の実施例を示す図。FIG. 2 is a diagram showing a second embodiment of the present invention.
【図３】この発明の第３の実施例を示す図。FIG. 3 is a diagram showing a third embodiment of the present invention.
【図４】この発明の更に他の実施例を示す図。FIG. 4 is a diagram showing still another embodiment of the present invention.
【図５】従来の無停電電源装置の概要を示すブロック
図。FIG. 5 is a block diagram showing an outline of a conventional uninterruptible power supply.
【図６】商用電力受電中から停電になった場合における
昇圧回路１８の出力電圧、負荷１３に供給される電圧を
示す図。FIG. 6 is a diagram showing an output voltage of the booster circuit 18 and a voltage supplied to the load 13 when a power failure occurs during receiving commercial power.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5G015 FA16 GA04 HA03 HA04 HA13 JA05 JA15 JA25 JA32 JA52 JA60 KA05 5H007 BB05 CA01 CB05 CB07 CC09 CC12 DA06 DB03 DC05 FA02 GA09 5H730 AA12 AS21 BB02 BB14 BB43 DD02 EE07 EE08 FD11 FG01 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference)
Claims (4)
へ供給すると共に充電器で蓄電池に充電し、 停電になると、上記蓄電池の電力を昇圧回路で昇圧し、
その昇圧出力をインバータで交流電力に変換し、その交
流電力を上記負荷へ供給する無停電電源装置において、 商用電力受電中に、上記昇圧回路の出力側を、上記蓄電
池の電圧より高い電圧に保持する手段が設けられている
ことを特徴とする無停電電源装置。1. While receiving commercial power, the commercial power is supplied to a load and the storage battery is charged by a charger. When a power failure occurs, the power of the storage battery is boosted by a booster circuit.
In an uninterruptible power supply that converts the boosted output to AC power by an inverter and supplies the AC power to the load, during receiving commercial power, the output side of the booster circuit is maintained at a voltage higher than the voltage of the storage battery An uninterruptible power supply device, comprising:
する手段は、上記充電器トランスを用いた補助昇圧回路
で構成されていることを特徴とする請求項１記載の無停
電電源装置。2. The uninterruptible power supply according to claim 1, wherein the means for holding the output side of the booster circuit at a high voltage is constituted by an auxiliary booster circuit using the charger transformer.
する手段は、上記昇圧回路の出力電圧を検知する手段
と、その検出電圧が第１基準電圧値以下になると上記昇
圧回路の駆動回路を起動し、上記検知電圧が上記第１基
準電圧より高い第２基準電圧以上になると上記駆動回路
の駆動を停止する手段とよりなることを特徴とする請求
項１記載の無停電電源装置。3. A means for holding the output side of the booster circuit at a high voltage, comprising: means for detecting an output voltage of the booster circuit; and a drive circuit for the booster circuit when the detected voltage falls below a first reference voltage value. 2. The uninterruptible power supply according to claim 1, further comprising means for activating the drive circuit and stopping the drive of the drive circuit when the detected voltage becomes equal to or higher than a second reference voltage higher than the first reference voltage.
する手段は、上記昇圧回路を周期的に動作させる手段で
あることを特徴とする請求項１記載の無停電電源装置。4. The uninterruptible power supply according to claim 1, wherein the means for holding the output side of the booster circuit at a high voltage is means for periodically operating the booster circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27177798A JP3898355B2 (en) | 1998-09-25 | 1998-09-25 | Uninterruptible power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27177798A JP3898355B2 (en) | 1998-09-25 | 1998-09-25 | Uninterruptible power system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000102195A true JP2000102195A (en) | 2000-04-07 |
| JP3898355B2 JP3898355B2 (en) | 2007-03-28 |
Family
ID=17504715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27177798A Expired - Fee Related JP3898355B2 (en) | 1998-09-25 | 1998-09-25 | Uninterruptible power system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3898355B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002176782A (en) * | 2000-12-08 | 2002-06-21 | Lecip Corp | Uninterruptible power supply unit |
| KR100428780B1 (en) * | 2001-04-18 | 2004-04-27 | 삼성전자주식회사 | Apparatus for supplying power of preventing erroneous operation of facilities according to temporary interruption of electric power and semiconductor manufacturing facilities using this |
| JP2006340515A (en) * | 2005-06-02 | 2006-12-14 | Toshiba Mitsubishi-Electric Industrial System Corp | Uninterruptible power supply unit |
| US7157882B2 (en) | 2002-11-22 | 2007-01-02 | Milwaukee Electric Tool Corporation | Method and system for battery protection employing a selectively-actuated switch |
| US7589500B2 (en) | 2002-11-22 | 2009-09-15 | Milwaukee Electric Tool Corporation | Method and system for battery protection |
| JP2010028883A (en) * | 2008-07-15 | 2010-02-04 | Nec Access Technica Ltd | Dc power supply for backup, and method of controlling the same |
| CN102315637A (en) * | 2011-04-08 | 2012-01-11 | 安伏（苏州）电子有限公司 | Direct-current power supply with power failure retention time |
| US8471532B2 (en) | 2002-11-22 | 2013-06-25 | Milwaukee Electric Tool Corporation | Battery pack |
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1998
- 1998-09-25 JP JP27177798A patent/JP3898355B2/en not_active Expired - Fee Related
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