JPS54104277A - Abnormality detector for polyphase pulse signal string - Google Patents
Abnormality detector for polyphase pulse signal stringInfo
- Publication number
- JPS54104277A JPS54104277A JP1043978A JP1043978A JPS54104277A JP S54104277 A JPS54104277 A JP S54104277A JP 1043978 A JP1043978 A JP 1043978A JP 1043978 A JP1043978 A JP 1043978A JP S54104277 A JPS54104277 A JP S54104277A
- Authority
- JP
- Japan
- Prior art keywords
- abnormality
- circuit
- signal
- pulse signal
- scr
- 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
- Power Conversion In General (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
PURPOSE: To detect the long-period abnormality of a polyphase pulse signal string, by outputting an abnormality signal when the smoothing output of the logical sum classified by polyphase pulse signals becomes less than a set voltage.
CONSTITUTION: Ignition pulse signal strings S1, S3 and S5 applied to thyristors SCR1, SCR3 and SCR5 are insulated electrically and then detected by pulse detectors 101, 103 and 105 before being waveform-shaped by waveform shaping circuits 111, 113 and 115. Then, their outputs are converted by monostable multivibrators into pulse signal strings of constant width and synthesized by OR circuit OR; the output of OR is converted by smoothing circuit 13 into a DC voltage signal, which is compared with the set voltage from voltage setting circuit 14 by comparator circuit 15. Then, when the signal falls down to the value of the set voltage, the abnormality signal is outputted via latch circuit 16. Since the smoothing circuit is used in this way, a practical abnormality detector can be obtained which detects no extremely-short-period abnormality.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1043978A JPS54104277A (en) | 1978-02-03 | 1978-02-03 | Abnormality detector for polyphase pulse signal string |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1043978A JPS54104277A (en) | 1978-02-03 | 1978-02-03 | Abnormality detector for polyphase pulse signal string |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54104277A true JPS54104277A (en) | 1979-08-16 |
Family
ID=11750179
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1043978A Pending JPS54104277A (en) | 1978-02-03 | 1978-02-03 | Abnormality detector for polyphase pulse signal string |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54104277A (en) |
-
1978
- 1978-02-03 JP JP1043978A patent/JPS54104277A/en active Pending
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