JPS5490523A - Transistorized protective circuit - Google Patents
Transistorized protective circuitInfo
- Publication number
- JPS5490523A JPS5490523A JP15798977A JP15798977A JPS5490523A JP S5490523 A JPS5490523 A JP S5490523A JP 15798977 A JP15798977 A JP 15798977A JP 15798977 A JP15798977 A JP 15798977A JP S5490523 A JPS5490523 A JP S5490523A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- transistor
- overvoltage
- anomalous
- 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
Landscapes
- Dc-Dc Converters (AREA)
Abstract
PURPOSE: To operate a protection from overvoltage and undervoltage to the load, by disconnecting a DC input at an electronic speed at the time of power anomalousness due to a damage of switching transistor and the like in the chopper type power source.
CONSTITUTION: In case of an anomalous voltage being generated at a terminal due to a damage of main transistor in a constant voltage circuit 2 of chopper type, an overvoltage is detected by an overvoltage detecting circuit OVD in an anomalous voltage detecting circuit 3, with this signal fed to a holding circuit 4 through a buffer transistor circuit. The holding circuit 4 holds the anomalous state by a signal from the anomalous voltage detecting circuit 3, and feeds a voltage E3 to a terminal 9 of an input DC switch 1. The switch 1 turns a transistor Q2 OFF by this voltage E3, further turns a transistor Q1 OFF, with a DC voltage E2, fed to the constant voltage circuit 2 of chopper type, disconnected at an electronic speed, thus preventing the load from overvoltage.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15798977A JPS5490523A (en) | 1977-12-28 | 1977-12-28 | Transistorized protective circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15798977A JPS5490523A (en) | 1977-12-28 | 1977-12-28 | Transistorized protective circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5490523A true JPS5490523A (en) | 1979-07-18 |
Family
ID=15661801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15798977A Pending JPS5490523A (en) | 1977-12-28 | 1977-12-28 | Transistorized protective circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5490523A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5673895A (en) * | 1993-01-27 | 1997-10-07 | Jidosha Kiki Co., Ltd. | Butterfly valve |
EP1394927A2 (en) * | 2002-08-29 | 2004-03-03 | Samsung Electronics Co., Ltd. | Power supply with surge protection |
US7055800B2 (en) | 2003-02-13 | 2006-06-06 | Taiho Kogyo Co., Ltd. | Flow rate control valve |
-
1977
- 1977-12-28 JP JP15798977A patent/JPS5490523A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5673895A (en) * | 1993-01-27 | 1997-10-07 | Jidosha Kiki Co., Ltd. | Butterfly valve |
EP1394927A2 (en) * | 2002-08-29 | 2004-03-03 | Samsung Electronics Co., Ltd. | Power supply with surge protection |
EP1394927A3 (en) * | 2002-08-29 | 2005-03-09 | Samsung Electronics Co., Ltd. | Power supply with surge protection |
US7088597B2 (en) | 2002-08-29 | 2006-08-08 | Samsung Electronics Co., Ltd. | High voltage supply device for eliminating a surge voltage |
US7055800B2 (en) | 2003-02-13 | 2006-06-06 | Taiho Kogyo Co., Ltd. | Flow rate control valve |
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