JPS61165043U - - Google Patents
Info
- Publication number
- JPS61165043U JPS61165043U JP4951785U JP4951785U JPS61165043U JP S61165043 U JPS61165043 U JP S61165043U JP 4951785 U JP4951785 U JP 4951785U JP 4951785 U JP4951785 U JP 4951785U JP S61165043 U JPS61165043 U JP S61165043U
- Authority
- JP
- Japan
- Prior art keywords
- overcurrent
- load
- pulse counter
- detects
- waveform
- 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 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
第１図は本考案の実施例を示すブロツク図であ
る。
１１…負荷としての電動機、１２…変流器、１
３…負荷電流検出器、１４…過電流設定器、１５
…過電流検出器、１６…電圧・周波数変換器、１
７…波形整形器としての単安定マルチバイブレー
タ、１８…パルスカウンタ、１９…デジタルスイ
ツチ。
FIG. 1 is a block diagram showing an embodiment of the present invention. 11...Electric motor as load, 12...Current transformer, 1
3...Load current detector, 14...Overcurrent setting device, 15
...Overcurrent detector, 16...Voltage/frequency converter, 1
7... Monostable multivibrator as a waveform shaper, 18... Pulse counter, 19... Digital switch.
Claims (1)
荷電流検出器と、この負荷の過電流レベルを設定
する過電流設定器と、負荷電流が過電流設定値を
超えるときにその超過量を検出する過電流検出器
と、この超過量を周波数に変換する電圧・周波数
変要器と、この電圧・周波数の変換器の出力波形
をパルス状に整形する波形整形器と、この波形整
形されたパルスをカウントするパルスカウンタと
、このパルスカウンタのカウント数が任意に設定
された値に達するときに過電流信号を出力するデ
ジタルスイツチとで構成されている過電流検出回
路。 A load current detector detects a signal proportional to the current flowing through the load, an overcurrent setting device sets the overcurrent level of this load, and an overcurrent setting device detects the excess amount when the load current exceeds the overcurrent setting value. A current detector, a voltage/frequency transformer that converts this excess amount into a frequency, a waveform shaper that shapes the output waveform of this voltage/frequency converter into a pulse shape, and a count of the waveform-shaped pulses. The overcurrent detection circuit consists of a pulse counter that detects the pulse counter, and a digital switch that outputs an overcurrent signal when the count of the pulse counter reaches an arbitrarily set value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4951785U JPS61165043U (en) | 1985-04-03 | 1985-04-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4951785U JPS61165043U (en) | 1985-04-03 | 1985-04-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61165043U true JPS61165043U (en) | 1986-10-13 |
Family
ID=30566799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4951785U Pending JPS61165043U (en) | 1985-04-03 | 1985-04-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61165043U (en) |
-
1985
- 1985-04-03 JP JP4951785U patent/JPS61165043U/ja active Pending