JPS54139048A - Dc control circuit - Google Patents
Dc control circuitInfo
- Publication number
- JPS54139048A JPS54139048A JP4749178A JP4749178A JPS54139048A JP S54139048 A JPS54139048 A JP S54139048A JP 4749178 A JP4749178 A JP 4749178A JP 4749178 A JP4749178 A JP 4749178A JP S54139048 A JPS54139048 A JP S54139048A
- Authority
- JP
- Japan
- Prior art keywords
- resistance
- capacitor
- scr
- damping
- 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.)
- Pending
Links
Landscapes
- Relay Circuits (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
PURPOSE: To obtain an econimic DC control circuit with a simple configuration by firing a damping resistance connected to a SCR in parallel with a delay of oscillation damping time or more of the filter circuit to short the damping resistance.
CONSTITUTION: A charging circuit in which a resistance 11 and a capacitor 12 are in series is connected to both contacts 8a and 8b of the filter circuit comprising a reactor 6 and a capacitor 7, a resistance 9 is inserted between the contact 8b and the capacitor 7, a SCR 13 is connected with the resystance 9 in parallel to short the resistance 9. A series circuit consisting of both a semiconductor switcing element 14 such as a shockless diode, which operates when the applied voltage becomes greater than a fixed value, and a current control resistance 15 is inserted between the gate of SCR 13 and the connecting point of resistance 11 with capacitor 12. In such a simple configuration, the damping resistance can be automatically switched on and off with non-contact when needed.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4749178A JPS54139048A (en) | 1978-04-20 | 1978-04-20 | Dc control circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4749178A JPS54139048A (en) | 1978-04-20 | 1978-04-20 | Dc control circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54139048A true JPS54139048A (en) | 1979-10-29 |
Family
ID=12776579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4749178A Pending JPS54139048A (en) | 1978-04-20 | 1978-04-20 | Dc control circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54139048A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56164416A (en) * | 1980-05-21 | 1981-12-17 | Usac Electronics Ind Co Ltd | Constant current control circuit |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5131849A (en) * | 1974-09-13 | 1976-03-18 | Hitachi Ltd | TONYUTEIKOTSUKI SHADANKINOTONYUHOHO |
-
1978
- 1978-04-20 JP JP4749178A patent/JPS54139048A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5131849A (en) * | 1974-09-13 | 1976-03-18 | Hitachi Ltd | TONYUTEIKOTSUKI SHADANKINOTONYUHOHO |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56164416A (en) * | 1980-05-21 | 1981-12-17 | Usac Electronics Ind Co Ltd | Constant current control circuit |
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