JPS62107523U - - Google Patents
Info
- Publication number
- JPS62107523U JPS62107523U JP19737685U JP19737685U JPS62107523U JP S62107523 U JPS62107523 U JP S62107523U JP 19737685 U JP19737685 U JP 19737685U JP 19737685 U JP19737685 U JP 19737685U JP S62107523 U JPS62107523 U JP S62107523U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- detection circuit
- input
- motor
- 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
- 238000001514 detection method Methods 0.000 claims description 8
- 238000012806 monitoring device Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
Landscapes
- Protection Of Generators And Motors (AREA)
- Stopping Of Electric Motors (AREA)
Description
第１図は誘導電動機の電圧電流特性図、第２図
は本考案の一実施例回路図である。
１……入力電流検出回路、２……基準電流設定
回路、３……時定数回路、４……信号送出スイツ
チ回路、５……入力電圧検出回路、ＣＴ……変流
器、ＲＥＣ１，ＲＥＣ２……整流回路、Ｒ１〜Ｒ
１１……抵抗、ＶＲ１，ＶＲ２……可変抵抗、Ｃ
１〜Ｃ３……コンデンサ、Ｄ１……結合用ダイオ
ード、Ａ１，Ａ２……電圧比較用演算増幅器、Ｔ
ｒ……スイツチングトランジスタ、ＭＳ……電磁
開閉器、Ｍ……電動機、ＩＭ……電流モニタ式ポ
ンプ運転監視装置。
FIG. 1 is a voltage-current characteristic diagram of an induction motor, and FIG. 2 is a circuit diagram of an embodiment of the present invention. 1...Input current detection circuit, 2...Reference current setting circuit, 3...Time constant circuit, 4...Signal sending switch circuit, 5...Input voltage detection circuit, CT...Current transformer, REC 1 , REC 2 ... Rectifier circuit, R1 to R
11 ...Resistance, VR 1 , VR 2 ...Variable resistance, C
1 to C3 ...Capacitor, D1 ...Coupling diode, A1 , A2 ...Voltage comparison operational amplifier, T
r... Switching transistor, MS... Electromagnetic switch, M... Electric motor, IM... Current monitor type pump operation monitoring device.
Claims (1)
を発生する入力電流検出回路と、その出力を一定
時間後基準電圧と比較して基準電圧以下となつた
とき、出力を送出して上記電動機の電源からの切
離しを行う遮断信号送出回路とからなるポンプ運
転監視装置において、上記電動機の入力電圧検出
回路を設けると共に、この入力電圧検出回路をそ
の出力電圧の変動分が入力電源検出回路の出力電
圧の変動分を打消すように入力電流検出回路に接
続して、電動機の入力電圧変動による入力電流の
変化分を補償するようにしたことを特徴とするポ
ンプ運転監視装置。 An input current detection circuit that generates a voltage proportional to the input current of the pump drive motor, and its output is compared with a reference voltage after a certain period of time, and when the voltage falls below the reference voltage, the output is sent out from the power supply of the motor. In a pump operation monitoring device comprising a cutoff signal sending circuit for disconnecting the motor, an input voltage detection circuit for the motor is provided, and the input voltage detection circuit is configured to detect fluctuations in the output voltage of the input power supply detection circuit by the fluctuations in the output voltage of the input voltage detection circuit. What is claimed is: 1. A pump operation monitoring device characterized in that the device is connected to an input current detection circuit so as to compensate for changes in input current due to fluctuations in input voltage of a motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19737685U JPS62107523U (en) | 1985-12-24 | 1985-12-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19737685U JPS62107523U (en) | 1985-12-24 | 1985-12-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62107523U true JPS62107523U (en) | 1987-07-09 |
Family
ID=31157051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19737685U Pending JPS62107523U (en) | 1985-12-24 | 1985-12-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62107523U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49100547A (en) * | 1973-01-29 | 1974-09-24 | ||
| JPS5142940A (en) * | 1974-10-09 | 1976-04-12 | Shinko Electric Co Ltd | KAFUKAKENSHUTSUSOCHI |
-
1985
- 1985-12-24 JP JP19737685U patent/JPS62107523U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49100547A (en) * | 1973-01-29 | 1974-09-24 | ||
| JPS5142940A (en) * | 1974-10-09 | 1976-04-12 | Shinko Electric Co Ltd | KAFUKAKENSHUTSUSOCHI |
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