JPS6459515A - Power failure sequence control circuit - Google Patents
Power failure sequence control circuitInfo
- Publication number
- JPS6459515A JPS6459515A JP62217636A JP21763687A JPS6459515A JP S6459515 A JPS6459515 A JP S6459515A JP 62217636 A JP62217636 A JP 62217636A JP 21763687 A JP21763687 A JP 21763687A JP S6459515 A JPS6459515 A JP S6459515A
- Authority
- JP
- Japan
- Prior art keywords
- power failure
- voltage
- sequence control
- input
- threshold values
- 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
Abstract
PURPOSE:To improve reliability for power failure sequence control, by bracketing the timing of the power failure sequence control by monitoring threshold values with two different, high and low, levels in the DC voltage of an input smoothing capacitor used in common to plural DC-DC converters. CONSTITUTION:At the time of generating power failure, the DC voltage Ei changes gently by the function of the input smoothing capacitor 17 even when an AC input voltage drops steeply. Therefore, assuming that first and second threshold values Er1 and Er2 are constant, a generating timing between an oscillation stoppage control signal and a power failure detecting signal is accelerated when a load is light, and is decelerated when it is weighty. Also, it is decelerated as the input AC voltage is high just before the generation of the power failure, and is accelerated as it is low. By setting the threshold values Er1 and Er2 appropriately within the range of the voltage possible to guarantee the stable output operation of the DC voltage Ei of the input smoothing capacitor Ci17 and in the neighborhood of the minimum level of the range, it is possible to realize the power failure sequence control surely and efficiently.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62217636A JPS6459515A (en) | 1987-08-31 | 1987-08-31 | Power failure sequence control circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62217636A JPS6459515A (en) | 1987-08-31 | 1987-08-31 | Power failure sequence control circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6459515A true JPS6459515A (en) | 1989-03-07 |
Family
ID=16707371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62217636A Pending JPS6459515A (en) | 1987-08-31 | 1987-08-31 | Power failure sequence control circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6459515A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08285474A (en) * | 1995-04-07 | 1996-11-01 | Shinagawa Refract Co Ltd | Furnace bottom electrode refractory brick in dc arc furnace |
JP2005033994A (en) * | 2003-07-04 | 2005-02-03 | Samsung Electronics Co Ltd | Protective device for power circuit |
JP2006304485A (en) * | 2005-04-20 | 2006-11-02 | Shindengen Electric Mfg Co Ltd | Switching power supply |
JP2013126277A (en) * | 2011-12-14 | 2013-06-24 | Ntt Data Intellilink Corp | Voltage converter and feeding subordinated control system |
-
1987
- 1987-08-31 JP JP62217636A patent/JPS6459515A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08285474A (en) * | 1995-04-07 | 1996-11-01 | Shinagawa Refract Co Ltd | Furnace bottom electrode refractory brick in dc arc furnace |
JP2005033994A (en) * | 2003-07-04 | 2005-02-03 | Samsung Electronics Co Ltd | Protective device for power circuit |
JP2006304485A (en) * | 2005-04-20 | 2006-11-02 | Shindengen Electric Mfg Co Ltd | Switching power supply |
JP2013126277A (en) * | 2011-12-14 | 2013-06-24 | Ntt Data Intellilink Corp | Voltage converter and feeding subordinated control system |
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