JPS6338073U - - Google Patents
Info
- Publication number
- JPS6338073U JPS6338073U JP13185086U JP13185086U JPS6338073U JP S6338073 U JPS6338073 U JP S6338073U JP 13185086 U JP13185086 U JP 13185086U JP 13185086 U JP13185086 U JP 13185086U JP S6338073 U JPS6338073 U JP S6338073U
- Authority
- JP
- Japan
- Prior art keywords
- alternating current
- detection circuit
- detected
- voltage
- determining means
- 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
- 238000001514 detection method Methods 0.000 claims description 6
- 230000000737 periodic effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Measurement Of Current Or Voltage (AREA)
Description
第１図は本考案の一実施例である交流電流検出
回路のブロツク図、第２図は第１図の回路の各部
波形を示すタイミングチヤート、第３図は従来例
の交流電流検出回路のブロツク図、第４図は第３
図の回路の各部波形を示すタイミングチヤートで
ある。
１……機器、２……変流器、３……スイツチ、
４……演算増幅器、５……マイクロコンピユータ
、７……入力検出部、８……中央演算制御回路（
ＣＰＵ）、９……メモリ、１０，１２……出力ポ
ート部、Ｃ１……電解コンデンサ、Ｄ１……ダイ
オード、Ｒ１，Ｒ２，Ｒ３……抵抗。
Fig. 1 is a block diagram of an alternating current detection circuit which is an embodiment of the present invention, Fig. 2 is a timing chart showing waveforms of various parts of the circuit of Fig. 1, and Fig. 3 is a block diagram of a conventional alternating current detection circuit. Figure 4 is the third
3 is a timing chart showing waveforms of various parts of the circuit shown in the figure. 1... equipment, 2... current transformer, 3... switch,
4...Operation amplifier, 5...Microcomputer, 7...Input detection section, 8...Central processing control circuit (
CPU), 9...Memory, 10, 12...Output port section, C1 ...Electrolytic capacitor, D1 ...Diode, R1 , R2 , R3 ...Resistance.
Claims (1)
手段と、 変換された直流電圧を所定のしきい値電圧と比
較することにより上記交流電流を検出しているか
否かを周期的に判断し該判断情報を出力する判断
手段とを備えた交流電流検出回路において、 上記判断手段が上記交流電流の検出の判断を行
う時の、上記周期的に判断する周期時間よりも十
分に短い時間だけ前に、上記直流電圧を少なくと
も上記判断手段のしきい値電圧よりも低い電圧に
一時的に低下させる手段を備えたことを特徴とす
る交流電流検出回路。[Claims for Utility Model Registration] Detecting means for detecting alternating current; converting means for converting the detected alternating current into direct current voltage; In the alternating current detection circuit, the alternating current detection circuit includes a determining means for periodically determining whether or not an alternating current is being detected and outputting the determination information, when the determining means determines whether or not the alternating current is detected. An alternating current characterized by comprising means for temporarily lowering the direct current voltage to a voltage lower than at least the threshold voltage of the determining means a sufficiently shorter period of time than the periodic time determined periodically. Current detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13185086U JPS6338073U (en) | 1986-08-27 | 1986-08-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13185086U JPS6338073U (en) | 1986-08-27 | 1986-08-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6338073U true JPS6338073U (en) | 1988-03-11 |
Family
ID=31030685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13185086U Pending JPS6338073U (en) | 1986-08-27 | 1986-08-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6338073U (en) |
-
1986
- 1986-08-27 JP JP13185086U patent/JPS6338073U/ja active Pending
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