JPS6152428U - - Google Patents
Info
- Publication number
- JPS6152428U JPS6152428U JP13637684U JP13637684U JPS6152428U JP S6152428 U JPS6152428 U JP S6152428U JP 13637684 U JP13637684 U JP 13637684U JP 13637684 U JP13637684 U JP 13637684U JP S6152428 U JPS6152428 U JP S6152428U
- Authority
- JP
- Japan
- Prior art keywords
- phase
- output
- maximum value
- detection circuit
- detects
- 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
- 238000001514 detection method Methods 0.000 claims description 5
- 238000009499 grossing Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図ａ，ｂ，ｃは欠相のいろいろの場合を示す
結線図、第３図ａ乃至ｅは第２図の各場合の波形
図、第４図ａ乃至ｄは第１図における各部の波形
図、第５図は従来例のブロツク図、第６図は他の
従来例のブロツク図である。
Ｔ１，Ｔ２，Ｔ３…変流器、Ｄ１，Ｄ２，Ｄ３
…整流器、Ｓ１，Ｓ２，Ｓ３…平滑回路、Ｍ…最
大値検出回路、Ｒ１，Ｒ２…分圧抵抗、Ｃ１，Ｃ
２，Ｃ３…コンパレータ、Ｈ１，Ｈ２…波形整形
回路、Ｅ…排他的論理和回路、Ｗ…ワンシヨツト
回路、Ｉ…インバータ、Ｇ…論理和回路。
FIG. 1 is a block diagram showing an embodiment of the present invention.
Figures 2 a, b, and c are connection diagrams showing various cases of open phase, Figures 3 a to e are waveform diagrams for each case in Figure 2, and Figures 4 a to d are diagrams of each part in Figure 1. FIG. 5 is a block diagram of a conventional example, and FIG. 6 is a block diagram of another conventional example. T1, T2, T3...Current transformer, D1, D2, D3
... Rectifier, S1, S2, S3... Smoothing circuit, M... Maximum value detection circuit, R1, R2... Voltage dividing resistor, C1, C
2, C3... Comparator, H1, H2... Waveform shaping circuit, E... Exclusive OR circuit, W... One shot circuit, I... Inverter, G... OR circuit.
Claims (1)
と、各変流器の半波整流出力を平滑化する平滑路
と、各平滑出力のうちの最大値を検出する最大値
検出回路と、最大値検出回路出力の分圧電圧と各
平滑出力とを比較するコンパレータと、任意の２
相が同相又は逆相である場合を検知する手段と、
同手段の検出出力と上記各コンパレータの出力を
入力とする論理和回路とを備えて成ることを特徴
とする欠相検出回路。 A current transformer that detects the current level of each phase of three-phase AC, a smoothing path that smoothes the half-wave rectified output of each current transformer, and a maximum value detection circuit that detects the maximum value of each smoothed output. , a comparator that compares the divided voltage of the maximum value detection circuit output and each smoothed output, and any two
means for detecting when the phases are in-phase or out-of-phase;
An open phase detection circuit comprising an OR circuit whose inputs are the detection output of the means and the outputs of the respective comparators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984136376U JPH0246206Y2 (en) | 1984-09-07 | 1984-09-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984136376U JPH0246206Y2 (en) | 1984-09-07 | 1984-09-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6152428U true JPS6152428U (en) | 1986-04-09 |
| JPH0246206Y2 JPH0246206Y2 (en) | 1990-12-06 |
Family
ID=30694834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984136376U Expired JPH0246206Y2 (en) | 1984-09-07 | 1984-09-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0246206Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5340004U (en) * | 1976-09-10 | 1978-04-07 | ||
| JPS5554445U (en) * | 1978-10-09 | 1980-04-12 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5340004B2 (en) * | 1973-01-27 | 1978-10-25 |
-
1984
- 1984-09-07 JP JP1984136376U patent/JPH0246206Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5340004U (en) * | 1976-09-10 | 1978-04-07 | ||
| JPS5554445U (en) * | 1978-10-09 | 1980-04-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0246206Y2 (en) | 1990-12-06 |
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