JP2000184717A - Power supply device - Google Patents
Power supply deviceInfo
- Publication number
- JP2000184717A JP2000184717A JP10352756A JP35275698A JP2000184717A JP 2000184717 A JP2000184717 A JP 2000184717A JP 10352756 A JP10352756 A JP 10352756A JP 35275698 A JP35275698 A JP 35275698A JP 2000184717 A JP2000184717 A JP 2000184717A
- Authority
- JP
- Japan
- Prior art keywords
- power
- power supply
- arrester
- supply device
- 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.)
- Pending
Links
Landscapes
- Stand-By Power Supply Arrangements (AREA)
- Rectifiers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は例えばＣＡＴＶシ
ステムの電源装置に適用され、商用電力を整流して直流
電力として負荷へ供給すると共に、停電時に、電池より
直流電力を負荷へ供給する電源装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to, for example, a power supply device of a CATV system, and relates to a power supply device which rectifies commercial power and supplies it to a load as DC power, and supplies DC power from a battery to the load when a power failure occurs. .
【０００２】[0002]
【従来の技術】図３に従来のこの種の電源装置を示す。
商用電源１１よりの商用交流電力はトランス１２を介
し、更に切替えスイッチ１３を通じて整流回路１４へ供
給され、その整流出力が負荷１５へ動作電力として供給
される。商用電源１１が停電すると、これが停電検出部
１７で検出され、その検出出力によりスイッチ１３が蓄
電池１８側に切替えられ、蓄電池１８の直流電力が保護
回路１９を通じて整流回路１４へ供給される。非停電時
において、蓄電池１８に対し、充電器２１により商用電
力が充電されている。整流回路１４の入力側に放電形ア
レスタ２２が接続され、雷などのサージ電圧が入力され
ると、そのサージ電圧によりアレスタ２２が動作してそ
のサージ電圧を短落して、負荷１５に入力され、負荷１
５が損傷しないようにされている。2. Description of the Related Art FIG. 3 shows a conventional power supply of this type.
Commercial AC power from the commercial power supply 11 is supplied to the rectifier circuit 14 through the transformer 12 and further through the changeover switch 13, and the rectified output is supplied to the load 15 as operating power. When the commercial power supply 11 loses power, this is detected by the power failure detection unit 17, the switch 13 is switched to the storage battery 18 by the detection output, and the DC power of the storage battery 18 is supplied to the rectification circuit 14 through the protection circuit 19. At the time of non-power failure, the storage battery 18 is charged with commercial power by the charger 21. When the discharge type arrester 22 is connected to the input side of the rectifier circuit 14 and a surge voltage such as lightning is input, the surge voltage causes the arrester 22 to operate, shorten the surge voltage, and is input to the load 15. Load 1
5 is not damaged.
【０００３】[0003]
【発明が解決しようとする課題】商用交流電力を受電中
にサージ電圧でアレスタ２２に電流が流れると、その次
の交流電力の半サイクルまでの交流電力のゼロ点交差に
よりアレスタ２２の放電が停止するが、直流電力が供給
されている状態でアレスタ２２が動作すると、電流がア
レスタ２２に流れ続け、いわゆる続流が発生し、負荷１
５あるいは電源供給器を破損もしくは燃焼させてしまう
ことがあった。When a current flows through the arrester 22 at a surge voltage while receiving commercial AC power, the discharge of the arrester 22 is stopped by a zero-point crossing of AC power until a half cycle of the next AC power. However, if the arrester 22 operates while DC power is being supplied, current continues to flow through the arrester 22, so-called continuation current occurs, and the load 1
5 or the power supply was damaged or burned.
【０００４】[0004]
【課題を解決するための手段】この発明によれば負荷へ
供給する直流電力を断続する手段が設けられる。その直
流電力の断続における断の期間は、アレスタに流れてい
る電流を消弧させるに十分な長さであり、かつ負荷の動
作に影響を与えない程度に短かいものとされる。According to the present invention, there is provided means for interrupting DC power supplied to a load. The intermittent period of the intermittent DC power is long enough to extinguish the current flowing through the arrester and short enough not to affect the operation of the load.
【０００５】[0005]
【発明の実施の形態】図１にこの発明の実施例を示し、
図３と対応する部分には同一番号を付けてある。この実
施例では蓄電池１８と切替スイッチ１３との間の電池電
力供給路にスイッチング素子としてＦＥＴ２５が直列に
挿入される。また停電検出部１７の検出出力により発振
動作を開始する発振器２６が設けられる。発振器２６は
方形波発振器であって、停電が検出されている間は発振
を断続する。発振器２６の発振出力は駆動回路２７を通
してＦＥＴ２５のゲートへ供給され、ＦＥＴ２５がスイ
ッチング制御される。つまり蓄電池１８より負荷１５側
へ供給される直流電力が断続される。FIG. 1 shows an embodiment of the present invention.
Parts corresponding to those in FIG. 3 are given the same numbers. In this embodiment, an FET 25 is inserted in series as a switching element in a battery power supply path between the storage battery 18 and the switch 13. An oscillator 26 that starts an oscillating operation based on a detection output of the power failure detection unit 17 is provided. The oscillator 26 is a square wave oscillator, and continuously oscillates while a power failure is detected. The oscillation output of the oscillator 26 is supplied to the gate of the FET 25 through the drive circuit 27, and the switching of the FET 25 is controlled. That is, the DC power supplied from the storage battery 18 to the load 15 is interrupted.
【０００６】この直流電力の断続における断の期間は、
動作中のアレスタ２２が消弧するに十分な時間であり、
かつ負荷１５の動作に影響を与えない時間、例えば０．
０５μｓ〜３μｓ程度とされる。その周波数は商用交流
電力の周波数と同程度、つまり１００〜１２０Ｈｚ程度
とされる。この構成によれば、停電中で蓄電池１８の直
流電力を負荷１５へ供給中に、サージ電圧で放電形アレ
スタ２２が動作しても、その動作直後の、直流電力の断
期間でアレスタ２２は消弧するため、電流が流れ続け、
機器を損傷するおそれはない。The intermittent period of the intermittent DC power is as follows:
Enough time for the active arrester 22 to extinguish,
And a time that does not affect the operation of the load 15, for example, 0.
It is set to about 05 μs to 3 μs. The frequency is approximately the same as the frequency of the commercial AC power, that is, approximately 100 to 120 Hz. According to this configuration, even if the discharge type arrester 22 operates with a surge voltage while the DC power of the storage battery 18 is being supplied to the load 15 during a power outage, the arrester 22 is turned off immediately after the operation during the DC power interruption period. Because of the arc, the current continues to flow,
There is no risk of equipment damage.
【０００７】図２にこの発明の他の実施例を示す。この
場合はアレスタ２２が動作して過電流が流れると、スイ
ッチ素子（ＦＥＴ）２５を一時的にオフとするようにし
た場合で、ＦＥＴ２５と直列に過電流検出用抵抗素子３
１が接続される。アレスタ２２が放電してその電流が抵
抗素子３１に流れると、その降下電圧が大となり、比較
器３２の出力が高レベルとなり、トランジスタ３３が導
通し、コンデンサ３４の電荷が放電され、比較器３５の
出力が高レベルとなり、これがインバータ３６で反転さ
れ、その出力で駆動回路３７を通じ、ＦＥＴ２５がオフ
とされる。電源端子３８から抵抗素子３９を通じてコン
デンサ３４に対する充電が行われ、コンデンサ３４の電
圧が所定値になると比較器３５が反転してその出力が低
レベルになり、これがインバータ３６で反転され駆動回
路３７が駆動され、ＦＥＴ２５がオンとなる。FIG. 2 shows another embodiment of the present invention. In this case, when the arrester 22 is operated and an overcurrent flows, the switch element (FET) 25 is temporarily turned off, and the overcurrent detection resistor element 3 is connected in series with the FET 25.
1 is connected. When the arrester 22 discharges and its current flows through the resistance element 31, the voltage drop becomes large, the output of the comparator 32 becomes high level, the transistor 33 conducts, the electric charge of the capacitor 34 is discharged, and the comparator 35 discharges. Is at a high level, which is inverted by the inverter 36, and the output of which turns off the FET 25 through the drive circuit 37. The capacitor 34 is charged from the power supply terminal 38 through the resistance element 39, and when the voltage of the capacitor 34 reaches a predetermined value, the comparator 35 is inverted and its output becomes low level. It is driven and the FET 25 is turned on.
【０００８】この時、先のＦＥＴ２５がオフにより直流
電力が断とされたことによりアレスタ２２が消弧すれ
ば、抵抗素子３１に流れる電流は過大なものでなく、Ｆ
ＥＴ２５はオン状態が保持される。しかし、ＦＥＴがオ
ンになった時に、そのアレスタ２２が消弧されなかった
場合は、比較器３２の出力が再び高レベルになり、前記
の動作が繰返され、つまりアレスタ２２が消弧するまで
ＦＥＴ２５はオンオフが繰返され、直流電力の供給が断
続される。このようにして通常はＦＥＴ２５が１乃至数
回オフとなればアレスタ２２は消弧する。At this time, if the arrestor 22 is extinguished because the DC power is cut off by turning off the FET 25, the current flowing through the resistance element 31 is not excessive, and F
The ON state of the ET 25 is maintained. However, if the arrestor 22 is not extinguished when the FET is turned on, the output of the comparator 32 goes high again and the above operation is repeated, that is, the FET 25 is turned off until the arrester 22 is extinguished. Are repeatedly turned on and off, and the supply of DC power is interrupted. In this manner, the arrestor 22 is normally extinguished when the FET 25 is turned off once or several times.
【０００９】[0009]
【発明の効果】以上述べたようにこの発明によれば直流
電力の供給を断続させることにより、アレスタの続流を
防止することができ、例えばＣＡＴＶシステムで直流送
電が可能となる。また蓄電池出力をインバータにより交
流電力に変換して負荷へ供給する場合は、交流電力であ
るためアレスタの続流の問題がないが、この場合と比較
してこの発明では部品点数が少ない、簡易な構成でアレ
スタの続流を防止でき、直流送電が可能となる。As described above, according to the present invention, by interrupting the supply of DC power, it is possible to prevent the arrestor from continuing, and for example, DC power can be transmitted in a CATV system. When the output of the storage battery is converted into AC power by the inverter and supplied to the load, the AC power does not cause a problem of continuation of the arrester, but the present invention has a smaller number of parts and is simpler than this case. With the configuration, the arrestor can be prevented from continuing, and DC power transmission becomes possible.
【図１】この発明の実施例を示す図。FIG. 1 is a diagram showing an embodiment of the present invention.
【図２】この発明の他の実施例の要部を示す図。FIG. 2 is a diagram showing a main part of another embodiment of the present invention.
【図３】従来の電源装置を示す図。FIG. 3 is a diagram showing a conventional power supply device.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5G015 FA02 GB02 HA03 HA15 JA05 JA32 JA35 JA53 JA55 JA62 5H006 AA04 AA05 BB02 BB03 CA02 CA07 CB01 CB08 CB09 CC01 CC02 DB01 DC05 FA01 FA02 FA04 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 5G015 FA02 GB02 HA03 HA15 JA05 JA32 JA35 JA53 JA55 JA62 5H006 AA04 AA05 BB02 BB03 CA02 CA07 CB01 CB08 CB09 CC01 CC02 DB01 DC05 FA01 FA02 FA04
Claims (2)
し、商用電力異常時には蓄電池から直流電力を出力する
電源装置であって、 上記電源装置から出力される電力は整流器を介して負荷
へ供給され、 上記整流器の入力側に交流電力のサージ防止用放電形ア
レスタが設けられた装置において、 上記負荷へ供給される直流電力を断続させる断続手段が
設けられていることを特徴とする電源装置。1. A power supply device that outputs AC power when commercial power is normal and outputs DC power from a storage battery when commercial power is abnormal. Power output from the power supply device is supplied to a load via a rectifier. A power supply device comprising a discharge arrester for preventing surge of AC power provided on an input side of the rectifier, further comprising an interrupting means for interrupting DC power supplied to the load.
手段と、 その検出出力により上記断続手段の断続を開始させる手
段とを備えることを特徴とする請求項１記載の電源装
置。2. The power supply device according to claim 1, further comprising: means for detecting that the arrester has operated; and means for starting the on / off operation of the on / off means based on the detection output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10352756A JP2000184717A (en) | 1998-12-11 | 1998-12-11 | Power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10352756A JP2000184717A (en) | 1998-12-11 | 1998-12-11 | Power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000184717A true JP2000184717A (en) | 2000-06-30 |
Family
ID=18426234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10352756A Pending JP2000184717A (en) | 1998-12-11 | 1998-12-11 | Power supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000184717A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790200A (en) * | 2016-03-11 | 2016-07-20 | 许继集团有限公司 | Convertor station and convertor valve hall thereof |
-
1998
- 1998-12-11 JP JP10352756A patent/JP2000184717A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790200A (en) * | 2016-03-11 | 2016-07-20 | 许继集团有限公司 | Convertor station and convertor valve hall thereof |
| CN105790200B (en) * | 2016-03-11 | 2017-12-26 | 许继集团有限公司 | A kind of current conversion station and its converter valve Room |
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