JPH02146942U - - Google Patents
Info
- Publication number
- JPH02146942U JPH02146942U JP5469389U JP5469389U JPH02146942U JP H02146942 U JPH02146942 U JP H02146942U JP 5469389 U JP5469389 U JP 5469389U JP 5469389 U JP5469389 U JP 5469389U JP H02146942 U JPH02146942 U JP H02146942U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- output
- comparator
- stabilized
- current
- 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
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
第１図は本考案の１実施例の構成を示すブロツ
ク図、第２図は従来の電圧監視回路を示すブロツ
ク図、第３図は第２図に示す電圧監視回路の問題
点を説明する部分構成図である。
ＤＳＰ……直流安定化電源、ＬＡＴ……ラツチ
、Ｑ３，Ｑ４……比較器、Ｖｉ……非安定化電圧
、Ｖｏ……直流電圧、ＶＤ１，ＶＤ２……分圧電
圧、Ｖｒ……基準電圧、ＲＬ……負荷、Ｒ８，Ｒ
９……電圧・電流変換抵抗、ＶＣ……比較器。
Fig. 1 is a block diagram showing the configuration of one embodiment of the present invention, Fig. 2 is a block diagram showing a conventional voltage monitoring circuit, and Fig. 3 is a portion explaining problems in the voltage monitoring circuit shown in Fig. 2. FIG. DSP...DC stabilized power supply, LAT...Latch, Q3 , Q4 ...Comparator, Vi...Unregulated voltage, Vo ...DC voltage, VD1 , VD2 ...Divided voltage, V r ...Reference voltage, RL...Load, R8 ,R
9 ... Voltage/current conversion resistance, VC... Comparator.
Claims (1)
化電圧として出力端から負荷に供給する直流安定
化電源と、前記安定化電圧と基準電圧とからそれ
ぞれ電圧・電流変換抵抗を介して入力端に電流信
号として印加された電流差動形の比較器と、この
比較器の出力端からの出力電圧が入力されその状
態をラツチするラツチ手段と、このラツ手段のラ
ツチ出力により前記直流安定化電源の安定化電圧
を低下させる電圧低下手段とを具備し、前記電圧
・電流制限抵抗を外付け調整抵抗としてその値が
前記負荷の許容電圧上限に達したときに前記比較
器の出力端の状態が反転するように選定されたこ
とを特徴とする電圧監視回路。 A DC stabilized power supply receives an unregulated voltage, stabilizes it and supplies it as a stabilized voltage to the load from the output end, and supplies the stabilized voltage and reference voltage to the input end via voltage/current conversion resistors, respectively. A current differential type comparator is applied as a current signal, a latch means receives the output voltage from the output terminal of the comparator and latches its state, and the latch output of the latch means controls the DC stabilized power supply. voltage reducing means for lowering the stabilizing voltage, and the voltage/current limiting resistor is an external adjusting resistor, and when the value reaches the upper limit of allowable voltage of the load, the state of the output terminal of the comparator is reversed. A voltage monitoring circuit characterized in that it is selected to:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5469389U JPH02146942U (en) | 1989-05-13 | 1989-05-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5469389U JPH02146942U (en) | 1989-05-13 | 1989-05-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02146942U true JPH02146942U (en) | 1990-12-13 |
Family
ID=31576983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5469389U Pending JPH02146942U (en) | 1989-05-13 | 1989-05-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02146942U (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54150659A (en) * | 1978-05-19 | 1979-11-27 | Mitsubishi Electric Corp | Protection circuit |
| JPS5583487A (en) * | 1978-12-15 | 1980-06-23 | Toyo Umpanki Co Ltd | Regenerative braking controller of dc shunt motor |
| JPS59213219A (en) * | 1983-05-18 | 1984-12-03 | 富士電機株式会社 | Protecting relay circuit monitoring device |
| JPS6062823A (en) * | 1983-09-14 | 1985-04-11 | フアナツク株式会社 | Regenerative voltage clamping circuit |
-
1989
- 1989-05-13 JP JP5469389U patent/JPH02146942U/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54150659A (en) * | 1978-05-19 | 1979-11-27 | Mitsubishi Electric Corp | Protection circuit |
| JPS5583487A (en) * | 1978-12-15 | 1980-06-23 | Toyo Umpanki Co Ltd | Regenerative braking controller of dc shunt motor |
| JPS59213219A (en) * | 1983-05-18 | 1984-12-03 | 富士電機株式会社 | Protecting relay circuit monitoring device |
| JPS6062823A (en) * | 1983-09-14 | 1985-04-11 | フアナツク株式会社 | Regenerative voltage clamping circuit |