JPH03106839U - - Google Patents
Info
- Publication number
- JPH03106839U JPH03106839U JP1370490U JP1370490U JPH03106839U JP H03106839 U JPH03106839 U JP H03106839U JP 1370490 U JP1370490 U JP 1370490U JP 1370490 U JP1370490 U JP 1370490U JP H03106839 U JPH03106839 U JP H03106839U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- resistor
- overcurrent detection
- detection circuit
- 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 9
- 230000001629 suppression Effects 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
Description
第１図は本考案の過電流検出回路の原理ブロツ
クを示す図、第２図は本考案の実施例としての過
電流検出回路を示す図、第３図は本考案の実施例
の過電流検出回路のツエナーダオードによつてパ
ルス電圧を制限することを示す特性図、第４図は
従来例の過電流検出回路図である。
符号の説明、１０……検出抵抗器、２０……フ
イルタ回路、３０……電圧抑制回路、５０……過
電流検出トリツプ信号発生回路。
Fig. 1 is a diagram showing the principle block of an overcurrent detection circuit of the present invention, Fig. 2 is a diagram showing an overcurrent detection circuit as an embodiment of the invention, and Fig. 3 is an overcurrent detection circuit of an embodiment of the invention. A characteristic diagram showing that the pulse voltage is limited by the Zener diode of the circuit, and FIG. 4 is a diagram of a conventional overcurrent detection circuit. Explanation of symbols: 10...detection resistor, 20...filter circuit, 30...voltage suppression circuit, 50...overcurrent detection trip signal generation circuit.
Claims (1)
ング素子に流れる電流を検出する抵抗器と該抵抗
器の端子電圧をフイルタリングするフイルタ回路
とを有し、フイルタリングされた電圧が所定レベ
ル以上のとき半導体スイツチング素子に過電流が
流れたことを検出する過電流検出回路において、 前記抵抗器と前記フイルタ回路との間に電圧抑
制回路を設け、前記フイルタ回路の時定数を小さ
くしたことを特徴とする過電流検出回路。 ２ 前記電圧抑制回路がツエナーダイオードであ
る請求項１記載の過電流検出回路。[Claims for Utility Model Registration] 1. A device that has a resistor that detects the current flowing through a semiconductor switching element that switches and drives a load, and a filter circuit that filters the terminal voltage of the resistor, and that the filtered voltage is set to a predetermined level. In the overcurrent detection circuit that detects that an overcurrent has flowed through a semiconductor switching element when the voltage exceeds a voltage level, a voltage suppression circuit is provided between the resistor and the filter circuit, and the time constant of the filter circuit is reduced. An overcurrent detection circuit featuring: 2. The overcurrent detection circuit according to claim 1, wherein the voltage suppression circuit is a Zener diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990013704U JPH0756582Y2 (en) | 1990-02-16 | 1990-02-16 | Overcurrent detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990013704U JPH0756582Y2 (en) | 1990-02-16 | 1990-02-16 | Overcurrent detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03106839U true JPH03106839U (en) | 1991-11-05 |
| JPH0756582Y2 JPH0756582Y2 (en) | 1995-12-25 |
Family
ID=31517105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990013704U Expired - Fee Related JPH0756582Y2 (en) | 1990-02-16 | 1990-02-16 | Overcurrent detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0756582Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008095410A (en) * | 2006-10-13 | 2008-04-24 | Yoshihisa Tsurumaki | Automatic push-up spring locking implement for sliding door |
| JP2018031778A (en) * | 2016-08-23 | 2018-03-01 | 株式会社Ｇｓユアサ | Overcurrent detection device and power storage device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6277822A (en) * | 1985-09-30 | 1987-04-10 | 株式会社東芝 | Overcurrent protecting device |
| JPH01166437U (en) * | 1988-05-12 | 1989-11-21 | ||
| JP3057897U (en) * | 1998-09-22 | 1999-06-08 | モリト株式会社 | Aids for on-board loads |
-
1990
- 1990-02-16 JP JP1990013704U patent/JPH0756582Y2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6277822A (en) * | 1985-09-30 | 1987-04-10 | 株式会社東芝 | Overcurrent protecting device |
| JPH01166437U (en) * | 1988-05-12 | 1989-11-21 | ||
| JP3057897U (en) * | 1998-09-22 | 1999-06-08 | モリト株式会社 | Aids for on-board loads |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008095410A (en) * | 2006-10-13 | 2008-04-24 | Yoshihisa Tsurumaki | Automatic push-up spring locking implement for sliding door |
| JP2018031778A (en) * | 2016-08-23 | 2018-03-01 | 株式会社Ｇｓユアサ | Overcurrent detection device and power storage device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0756582Y2 (en) | 1995-12-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |