JPS6459515A - Power failure sequence control circuit - Google Patents

Power failure sequence control circuit

Info

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
Application number
JP62217636A
Other languages
Japanese (ja)
Inventor
Takashi Yotsutsuji
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PFU Ltd
Original Assignee
PFU Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by PFU Ltd filed Critical PFU Ltd
Priority to JP62217636A priority Critical patent/JPS6459515A/en
Publication of JPS6459515A publication Critical patent/JPS6459515A/en
Pending legal-status Critical Current

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.
JP62217636A 1987-08-31 1987-08-31 Power failure sequence control circuit Pending JPS6459515A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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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