JP2537173Y2 - Uninterruptible power system - Google Patents
Uninterruptible power systemInfo
- Publication number
- JP2537173Y2 JP2537173Y2 JP1990012117U JP1211790U JP2537173Y2 JP 2537173 Y2 JP2537173 Y2 JP 2537173Y2 JP 1990012117 U JP1990012117 U JP 1990012117U JP 1211790 U JP1211790 U JP 1211790U JP 2537173 Y2 JP2537173 Y2 JP 2537173Y2
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- commercial power
- inverter
- storage battery
- output terminal
- 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 - Lifetime
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- Stand-By Power Supply Arrangements (AREA)
Description
【考案の詳細な説明】 「産業上の利用分野」 この考案は蓄電池の電力を交流電力に変換するインバ
ータを商用電源と併用して、コンピュータなどの負荷に
停電のない安定した電力を供給する無停電電源装置に関
する。[Detailed description of the invention] "Industrial application field" This invention uses an inverter that converts the power of a storage battery into AC power together with a commercial power supply to supply stable power without a power failure to a load such as a computer. The present invention relates to a power failure power supply.
「従来の技術」 第３図に従来の無停電電源装置を示す。第1,第２入力
端子11,12は商用電源13の両端に接続されるべき端子で
あり、第1,第２出力端子14,15は負荷16の両端に接続さ
れるべき端子であり、第1,第２入力端子11,12は充電回
路17の入力側に接続され、充電回路17の出力側は蓄電池
18の両端に接続され、蓄電池18の両端はインバータ19の
入力側に接続され、切替えスイッチ21は商用電源13が正
常な場合は第１入力端子11を第１出力端子14に接続し、
商用電源13が停電の場合はインバータ19の出力側の一端
を第１出力端子14に接続し、インバータ19の出力側の他
端は第２出力端子15に接続される。[Related Art] FIG. 3 shows a conventional uninterruptible power supply. The first and second input terminals 11 and 12 are terminals to be connected to both ends of the commercial power supply 13, and the first and second output terminals 14 and 15 are terminals to be connected to both ends of the load 16. 1, the second input terminals 11 and 12 are connected to the input side of the charging circuit 17, and the output side of the charging circuit 17 is a storage battery.
Both ends of the storage battery 18 are connected to the input side of the inverter 19, and the changeover switch 21 connects the first input terminal 11 to the first output terminal 14 when the commercial power supply 13 is normal,
When the commercial power supply 13 is out of power, one end on the output side of the inverter 19 is connected to the first output terminal 14, and the other end on the output side of the inverter 19 is connected to the second output terminal 15.
商用電源13が正常な場合は切替えスイッチ21を通して
第1,第２出力端子14,15に商用交流電力を供給すると同
時に、充電回路17を通じて蓄電池18を充電している。商
用電源13が停電した場合はインバータ19が起動し、イン
バータ19で蓄電池18の電力を交流電力に変換し、その交
流電力を切替えスイッチ21を通して第1,第２出力端子1
4,15へ供給する。インバータ19の出力を、商用電源13の
正常時に同期させておき、切替えスイッチ21の切替えを
高速に行うことにより、負荷16に悪影響を出さずに負荷
16に電力を供給し続けることができる。When the commercial power supply 13 is normal, the commercial AC power is supplied to the first and second output terminals 14 and 15 through the changeover switch 21 and the storage battery 18 is charged through the charging circuit 17. When the commercial power supply 13 is interrupted, the inverter 19 is started, the inverter 19 converts the power of the storage battery 18 into AC power, and converts the AC power through the switch 21 to the first and second output terminals 1.
Supply to 4,15. The output of the inverter 19 is synchronized when the commercial power supply 13 is normal, and the changeover switch 21 is switched at a high speed so that the load 16 is not adversely affected.
16 can continue to supply power.
従来において入力端子12と出力端子15とを互いに接続
して共通電位とするには、商用電源13と蓄電池18とを直
流的に絶縁するか、あるいはインバータ19において蓄電
池18とインバータ19の出力側とを直流的に絶縁しないと
インバータ19の１つのスイッチング素子が常時短絡され
た状態となり、インバータ19を動作させることができな
いため、従来では前記直流的絶縁のために、トランスが
用いられていた。Conventionally, in order to connect the input terminal 12 and the output terminal 15 to each other and to have a common potential, the commercial power supply 13 and the storage battery 18 are DC-insulated or the inverter 19 is connected to the output side of the storage battery 18 and the inverter 19. Otherwise, one switching element of the inverter 19 is always short-circuited, and the inverter 19 cannot be operated. Therefore, a transformer is conventionally used for the DC isolation.
「考案が解決しようとする課題」 前述のように直流的絶縁のために従来においてはトラ
ンスを用いていたため大きく重いという欠点があり、小
形軽量化のネックになっていた。"Problem to be Solved by the Invention" As described above, since a transformer was conventionally used for DC insulation, there was a drawback that the transformer was large and heavy, which was a bottleneck in miniaturization and weight reduction.
この考案の目的は充電回路又はインバータでの直流的
絶縁を不要とし、絶縁トランスをなくすことができる無
停電電源装置を提供することにある。It is an object of the present invention to provide an uninterruptible power supply which can eliminate DC insulation in a charging circuit or an inverter and can eliminate an insulating transformer.
「課題を解決するための手段」 この考案によれば、商用電源が正常な状態でその商用
電源の一端が接続される第１入力端子を第１出力端子に
接続し、上記商用電源が停電状態で、蓄電池の電力を交
流電力に変換するインバータの出力側の一端を上記第１
出力端子に接続する切替えスイッチを備え、上記蓄電池
に対し充電回路を通じて上記商用電源電力により充電
し、かつ上記第１出力端子及び第２出力端子間に負荷を
接続するようにし、 上記商用電源の他端が接続される第２入力端子と、上
記インバータの出力側の他端と、上記第２出力端子とが
接続され、 上記第１入力端子と、上記充電回路の第１の入力側と
の間に、上記蓄電池に対し順方向の整流素子と、インバ
ータ動作時にオフとされる制御スイッチとの直列回路が
挿入され、 上記充電回路の第１の入力側と第２の入力側に平滑用
コンデンサが接続され、上記充電回路は昇圧チョッパ形
DC−DCコンバータで構成され、 上記インバータはフルブリッジ形であり、かつその各
スイッチング素子と並列にそれぞれ保護用ダイオードが
接続される。According to the present invention, a first input terminal to which one end of the commercial power supply is connected is connected to a first output terminal in a state where the commercial power supply is normal, and the commercial power supply is in a power failure state. Then, one end on the output side of the inverter for converting the power of the storage battery into the AC power is connected to the first side.
A changeover switch connected to an output terminal, wherein the storage battery is charged by the commercial power supply through a charging circuit, and a load is connected between the first output terminal and the second output terminal; A second input terminal to which an end is connected, the other end on the output side of the inverter, and the second output terminal are connected, and between the first input terminal and a first input side of the charging circuit. In addition, a series circuit of a forward rectifying element and a control switch that is turned off during the operation of the inverter is inserted into the storage battery, and a smoothing capacitor is provided on a first input side and a second input side of the charging circuit. Connected, the charging circuit is a boost chopper type
The inverter is a full-bridge type, and a protection diode is connected in parallel with each switching element.
「実施例」 第１図にこの考案の実施例を示し、第３図と対応する
部分に同一符号を付けてある。インバータ19はスイッチ
ング素子Q1，Q2が順方向に直列に接続され、その両端が
蓄電池18の両端に接続され、スイッチング素子Q3，Q4が
順方向に直列に接続され、その両端が蓄電池18の両端に
接続され、スイッチング素子Q1，Q2の接続点とスイッチ
ング素子Q3，Q4の接続点とが低域通過濾波器22の入力側
に接続され、低域通過濾波器22の出力側の一端23は切替
えスイッチ21に接続され、他端24、つまりスイッチング
素子Q3，Q4の接続点は第２入力端子12及び第２出力端子
15に共通線で接続される。"Embodiment" FIG. 1 shows an embodiment of the present invention, in which parts corresponding to those in FIG. 3 are denoted by the same reference numerals. Inverter 19 has switching elements Q 1 and Q 2 connected in series in the forward direction, both ends of which are connected to both ends of storage battery 18, and switching elements Q 3 and Q 4 connected in series in the forward direction and both ends of the storage battery The connection point of the switching elements Q 1 and Q 2 and the connection point of the switching elements Q 3 and Q 4 are connected to the input side of the low-pass filter 22. One end 23 on the output side is connected to the changeover switch 21, and the other end 24, that is, the connection point of the switching elements Q 3 and Q 4 is connected to the second input terminal 12 and the second output terminal.
15 is connected by a common line.
またこの考案では第１入力端子11は整流素子25と制御
スイッチ26との直列接続を通じて充電回路17の入力端に
接続される。充電回路17の入力側にコンデンサ27が並列
に接続され、充電回路17は昇圧チョッパ回路よりなるDC
/DCコンバータとして構成した場合で、リアクトル28を
介してコンデンサ27の両端がスイッチング素子29で断続
され、その断続とリアクトル28の作用とにより昇圧され
た出力がダイオード31で整流されて蓄電池18へ供給され
る。つまりインバータ19の出力は商用電源13の電圧と同
一とする必要があり、このためには商用電源13の電圧を
100Vとする時、その波高値以上の140V以上に蓄電池18を
充電する。整流素子25はその出力で蓄電池18を充電でき
る極性、つまり蓄電池18と順方向とされる。制御スイッ
チ26は停電の時、オフとされる。In the present invention, the first input terminal 11 is connected to the input terminal of the charging circuit 17 through the series connection of the rectifying element 25 and the control switch 26. A capacitor 27 is connected in parallel to the input side of the charging circuit 17, and the charging circuit 17 is a DC
/ DC converter, both ends of the capacitor 27 are connected and disconnected by the switching element 29 via the reactor 28, and the output boosted by the connection and the action of the reactor 28 is rectified by the diode 31 and supplied to the storage battery 18. Is done. In other words, the output of the inverter 19 needs to be the same as the voltage of the commercial power supply 13,
When the voltage is set to 100 V, the storage battery 18 is charged to 140 V or more, which is not less than the peak value. The rectifier 25 has a polarity that allows the storage battery 18 to be charged with its output, that is, the rectifier 25 has a forward direction with respect to the storage battery 18. The control switch 26 is turned off at the time of a power failure.
第１入力端子11に停電検出回路32に接続され、商用電
源13が正常な場合は停電検出回路32の出力は低レベル
で、これが反転回路33を通じて制御スイッチ26の駆動回
路34、充電回路17の駆動回路35、切替えスイッチ21の制
御回路36へそれぞれ供給され、制御スイッチ26がオンと
され、充電回路17のスイッチング素子29がオンオフ制御
され、切替えスイッチ21が第１入力端子11側に接続され
る。従って商用電源13の交流電力が負荷16へ供給される
と共に、商用電源13の正の半波で商用電源13→整流素子
25→制御スイッチ26→コンデンサ27→ダイオードD4（ス
イッチング素子Q4と並列）→商用電源13のループにより
コンデンサ27を充電し、そのコンデンサ27の電圧を充電
回路17で昇圧して蓄電池18に対する充電が行われる。The first input terminal 11 is connected to a power failure detection circuit 32, and when the commercial power supply 13 is normal, the output of the power failure detection circuit 32 is at a low level. The drive circuit 35 is supplied to the control circuit 36 of the changeover switch 21, the control switch 26 is turned on, the switching element 29 of the charging circuit 17 is turned on / off, and the changeover switch 21 is connected to the first input terminal 11 side. . Accordingly, the AC power of the commercial power supply 13 is supplied to the load 16, and the commercial power supply 13 → the rectifier
25 → (parallel to the switching element Q 4) control switch 26 → the capacitor 27 → the diode D 4 → loop by charging the capacitor 27 of the commercial power supply 13, charging of the battery 18 by boosting the voltage of the capacitor 27 by the charging circuit 17 Is performed.
商用電源13が停電になると、停電検出回路32の出力が
即時に高レベルとなり、これがインバータ駆動回路37及
び切替えスイッチ21の制御回路38へそれぞれ供給され、
インバータ19が動作し、つまりスイッチング素子Q1，Q4
とQ2，Q3とが交互にオンオフ制御され、切替えスイッチ
21がインバータ19の出力端23に接続され、インバータ19
の交流出力が負荷16へ供給される。これと共に制御スイ
ッチ26はオフとされ、スイッチング素子29はオフのまま
とされる。When the commercial power supply 13 loses power, the output of the power failure detection circuit 32 immediately becomes high level, and this is supplied to the inverter drive circuit 37 and the control circuit 38 of the changeover switch 21, respectively.
The inverter 19 operates, that is, the switching elements Q 1 and Q 4
And Q 2 , Q 3 are alternately turned on and off, and a changeover switch
21 is connected to the output terminal 23 of the inverter 19,
Is supplied to the load 16. At the same time, the control switch 26 is turned off, and the switching element 29 is kept off.
この状態より商用電源13が復電し、商用電源が確立
し、インバータ出力が商用電源に対する同期がとれる
と、停電検出回路32の出力が低レベルとなり、制御スイ
ッチ26がオンにされる。復電直後、つまり前記同期がと
れるまではまだインバータ19が動作しており、制御スイ
ッチ26がなければ、スイッチング素子Q3がオンの時に、
商用電源13の正の半波で商用電源13→第１入力端子11→
整流素子25→制御スイッチ26→リアクトル28→整流素子
31→スイッチング素子Q3→第２入力端子12→商用電源13
のループにより商用電源短絡電流が流れる。しかしこの
考案では制御スイッチ26を設け、停電検出回路32が復電
同期を検出するまで制御スイッチ26をオフとしているた
め、復電時における前記スイッチング素子Q3の短絡は生
じない。When the commercial power supply 13 is restored from this state and the commercial power supply is established and the inverter output is synchronized with the commercial power supply, the output of the power failure detection circuit 32 becomes low level, and the control switch 26 is turned on. Immediately after power is restored, i.e. have the still inverter 19 until locking can be established to operate, if there is no control switch 26, when the switching element Q 3 is turned on,
Commercial power supply 13 → first input terminal 11 → positive half-wave of commercial power supply 13
Rectifier 25 → Control switch 26 → Reactor 28 → Rectifier
31 → Switching element Q 3 → Second input terminal 12 → Commercial power supply 13
, A short circuit current of the commercial power supply flows. However this invention is provided a control switch 26, since the power failure detection circuit 32 is turned off the control switch 26 to detect the power recovery synchronization, there is no short-circuit of the switching element Q 3 at the time of power restoration.
制御スイッチ26としてはリレー接点、トランジスタ、
サイリスタなどを使用することができる。この制御スイ
ッチ26としてサイリスタを用いた回路例を第２図に示
す。この場合はサイリスタ26のカソードが充電回路17側
とされ、そのカソードと蓄電池18との間にサイリスタ39
が接続され、サイリスタ39のアノードは蓄電池18側とさ
れ、サイリスタ26と39とは互いに逆に制御される。商用
電源13が正常な場合はサイリスタ26がオン、39がオフと
されており、商用電源13の電圧が100V、蓄電池18の公称
電圧が180Vであれば、コンデンサ27の電圧は約110〜130
VDCとなり、これが約205VDCに昇圧されて蓄電池18が充
電される。停電になると、サイリスタ26の駆動信号がオ
フとなり、サイリスタ39がオンとされ、コンデンサ27の
電圧及び商用電源13の電圧よりも蓄電池18の電圧が高い
ため、サイリスタ26に逆電圧がかかり、サイリスタ26は
瞬時にオフとなる。As the control switch 26, a relay contact, a transistor,
A thyristor or the like can be used. An example of a circuit using a thyristor as the control switch 26 is shown in FIG. In this case, the cathode of the thyristor 26 is set to the charging circuit 17 side, and the thyristor 39 is connected between the cathode and the storage battery 18.
Is connected, the anode of the thyristor 39 is set to the storage battery 18 side, and the thyristors 26 and 39 are controlled to be opposite to each other. If the commercial power supply 13 is normal, the thyristor 26 is on and 39 is off.If the voltage of the commercial power supply 13 is 100 V and the nominal voltage of the storage battery 18 is 180 V, the voltage of the capacitor 27 is about 110 to 130.
V DC next, this is the step-up battery 18 is charged to about 205V DC. When a power failure occurs, the drive signal of the thyristor 26 is turned off, the thyristor 39 is turned on, and since the voltage of the storage battery 18 is higher than the voltage of the capacitor 27 and the voltage of the commercial power supply 13, a reverse voltage is applied to the thyristor 26, Turns off instantaneously.
なお上述において停電時にも充電回路の駆動回路35を
動作させておいてもよい。つまりスイッチング素子29を
オンオフさせていてもよい。In the above description, the driving circuit 35 of the charging circuit may be operated even during a power failure. That is, the switching element 29 may be turned on and off.
また、第２図の回路では、制御スイッチとしてのサイ
リスタ26に整流素子25の整流作用を兼ねさせてもよい。In the circuit of FIG. 2, the thyristor 26 serving as a control switch may also have the rectifying function of the rectifying element 25.
「考案の効果」 以上述べたようにこの考案によれば、整流素子25を通
じて蓄電池18を充電するように構成することにより、商
用電源13、負荷16の各一端を共通線で接続して、トラン
スで直流的に絶縁する必要がなく、小形軽量に構成する
ことができる。蓄電池18に対する充電は商用電源13の電
圧の半波でしか行われないが、蓄電池18はある程度充電
されていると、漏洩電流をおぎなう程度に充電すればよ
いから、半波充電でも十分である。[Effects of the Invention] As described above, according to the invention, the storage battery 18 is charged through the rectifying element 25, so that one end of the commercial power supply 13 and one end of the load 16 are connected by a common line, and the transformer is connected. Therefore, it is not necessary to insulate in a DC manner, and it is possible to configure a small and lightweight. Charging of the storage battery 18 is performed only by a half-wave of the voltage of the commercial power supply 13. However, if the storage battery 18 is charged to some extent, it is sufficient to charge the storage battery 18 to an extent that the leakage current can be suppressed.
第１図はこの考案の実施例を示す接続図、第２図はその
一部変形例を示す接続図、第３図は従来の無停電電源装
置を示すブロック図である。FIG. 1 is a connection diagram showing an embodiment of the present invention, FIG. 2 is a connection diagram showing a partially modified example thereof, and FIG. 3 is a block diagram showing a conventional uninterruptible power supply.
Claims (1)
端が接続される第１入力端子を第１出力端子に接続し、
上記商用電源が停電状態で、蓄電池の電力を交流電力に
変換するインバータの出力側の一端を上記第１出力端子
に接続する切替えスイッチを備え、上記蓄電池に対し充
電回路を通じて上記商用電源電力により充電し、かつ上
記第１出力端子及び第２出力端子間に負荷を接続するよ
うにした無停電電源装置において、 上記商用電源の他端が接続される第２入力端子と、上記
インバータの出力側の他端と、上記第２出力端子とが接
続され、 上記第１入力端子と、上記充電回路の第１の入力側との
間に、上記蓄電池に対し順方向の整流素子と、インバー
タ動作時にオフとされる制御スイッチとの直列回路が挿
入され、 上記充電回路の第１の入力側と第２の入力側に平滑用コ
ンデンサが接続され、上記充電回路は昇圧チョッパ形DC
−DCコンバータで構成され、 上記インバータはフルブリッジ形であり、かつその各ス
イッチング素子と並列にそれぞれ保護用ダイオードが接
続されていることを特徴とする無停電電源装置。A first input terminal to which one end of the commercial power supply is connected to a first output terminal when the commercial power supply is normal;
A switch for connecting one end of an output side of an inverter for converting electric power of the storage battery to AC power to the first output terminal when the commercial power supply is in a power failure state, and charging the storage battery with the commercial power supply through a charging circuit; And an uninterruptible power supply having a load connected between the first output terminal and the second output terminal, comprising: a second input terminal to which the other end of the commercial power supply is connected; and an output terminal of the inverter. The other end is connected to the second output terminal, between the first input terminal and the first input side of the charging circuit, a rectifying element in a forward direction with respect to the storage battery, and turned off during inverter operation. A smoothing capacitor is connected to a first input side and a second input side of the charging circuit, and the charging circuit is a step-up chopper type DC.
-An uninterruptible power supply comprising a DC converter, wherein the inverter is a full-bridge type, and a protection diode is connected in parallel with each switching element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990012117U JP2537173Y2 (en) | 1990-02-09 | 1990-02-09 | Uninterruptible power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990012117U JP2537173Y2 (en) | 1990-02-09 | 1990-02-09 | Uninterruptible power system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03104048U JPH03104048U (en) | 1991-10-29 |
| JP2537173Y2 true JP2537173Y2 (en) | 1997-05-28 |
Family
ID=31515607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990012117U Expired - Lifetime JP2537173Y2 (en) | 1990-02-09 | 1990-02-09 | Uninterruptible power system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2537173Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5360408B2 (en) * | 2009-11-04 | 2013-12-04 | 富士電機株式会社 | Power converter |
| JP6166808B1 (en) * | 2016-02-12 | 2017-07-19 | 株式会社日本製鋼所 | Backup storage battery for power supply for industrial machine control |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02139446U (en) * | 1989-04-26 | 1990-11-21 |
-
1990
- 1990-02-09 JP JP1990012117U patent/JP2537173Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03104048U (en) | 1991-10-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |