JPS5517279A - Circuit for detecting load short-circuit - Google Patents
Circuit for detecting load short-circuitInfo
- Publication number
- JPS5517279A JPS5517279A JP9063878A JP9063878A JPS5517279A JP S5517279 A JPS5517279 A JP S5517279A JP 9063878 A JP9063878 A JP 9063878A JP 9063878 A JP9063878 A JP 9063878A JP S5517279 A JPS5517279 A JP S5517279A
- Authority
- JP
- Japan
- Prior art keywords
- output
- current
- pattern
- circuit
- pattern current
- 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
Landscapes
- Protection Of Static Devices (AREA)
- Control Of Voltage And Current In General (AREA)
- Power Conversion In General (AREA)
- Ac-Ac Conversion (AREA)
Abstract
PURPOSE: To prevent an unnecessary stopping operation by putting a detection circuit in insensitive condition when overshoot of real current or pattern current varies abruptly.
CONSTITUTION: Three output pulses 17, 19 and 21 from a first, second and third monostable multivibrator circuit 17, 19 and 20 are applied to an OR gate 22 to obtain their logical sum output 22. When amplifying said output 22 to pattern current 10-d and adding, an output 23 which has very high constant level when anyone of the three output pulses 17, 19 and 21 occurs while changes similarly with pattern current in other case is obtained. When subtracting 12-d which is obtained by full- wave rectifying said output 23 from that obtained by full-wave rectifying the real current in a subtractor 14, a signal 14-b is obtained which is drawn significantly when the polarity of the pattern current is switched or in case of abrupt change of the pattern current. Therefore, the difference between the output and pattern currents becomes great to avoid an operation of the detection circuit 15.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9063878A JPS5517279A (en) | 1978-07-25 | 1978-07-25 | Circuit for detecting load short-circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9063878A JPS5517279A (en) | 1978-07-25 | 1978-07-25 | Circuit for detecting load short-circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5517279A true JPS5517279A (en) | 1980-02-06 |
JPS618674B2 JPS618674B2 (en) | 1986-03-15 |
Family
ID=14004032
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9063878A Granted JPS5517279A (en) | 1978-07-25 | 1978-07-25 | Circuit for detecting load short-circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5517279A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63192377U (en) * | 1987-05-30 | 1988-12-12 |
-
1978
- 1978-07-25 JP JP9063878A patent/JPS5517279A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS618674B2 (en) | 1986-03-15 |
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