GB2392027A - An arrangement and a method in a dc system - Google Patents

An arrangement and a method in a dc system

Info

Publication number
GB2392027A
GB2392027A GB0328010A GB0328010A GB2392027A GB 2392027 A GB2392027 A GB 2392027A GB 0328010 A GB0328010 A GB 0328010A GB 0328010 A GB0328010 A GB 0328010A GB 2392027 A GB2392027 A GB 2392027A
Authority
GB
United Kingdom
Prior art keywords
signal
circuit
voltage
current
alerting
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
Application number
GB0328010A
Other versions
GB0328010D0 (en
GB2392027B (en
Inventor
Goeran Loef
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB0328010D0 publication Critical patent/GB0328010D0/en
Publication of GB2392027A publication Critical patent/GB2392027A/en
Application granted granted Critical
Publication of GB2392027B publication Critical patent/GB2392027B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/30—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Power Engineering (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

A DC system (31) is fed by an external power source (6, 7). When power fails, circuits (32) in the system are to be rapidly alerted (S1) to save unstored information, before the input DC (S4) has fallen too low. A capacitor device (34) is connected to the system input (30) and a current (I1) in the capacitor connection (37) is detected (36). When power fails the current (I1) flows from the capacitor device (34) and a detection circuit (36) generates a corresponding signal. This signal is delayed a predetermined time interval into an alerting signal (S1), which is transmitted to the DC circuit (32). Delaying the signal before the alerting ensures that a very short fail in the DC voltage (S4), or ripple in this voltage, will not unnecessarily alert the DC circuit (32) to start saving information.
GB0328010A 2001-06-21 2001-06-21 An arrangement and a method in a dc system Expired - Fee Related GB2392027B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE2001/001454 WO2003001644A1 (en) 2001-06-21 2001-06-21 An arrangement and a method in a dc system

Publications (3)

Publication Number Publication Date
GB0328010D0 GB0328010D0 (en) 2004-01-07
GB2392027A true GB2392027A (en) 2004-02-18
GB2392027B GB2392027B (en) 2005-01-19

Family

ID=20283879

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0328010A Expired - Fee Related GB2392027B (en) 2001-06-21 2001-06-21 An arrangement and a method in a dc system

Country Status (2)

Country Link
GB (1) GB2392027B (en)
WO (1) WO2003001644A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10334047A1 (en) * 2003-07-25 2005-02-24 Clariant Gmbh Adsorbate from phyllosilicate and its use

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3919183A1 (en) * 1989-06-12 1990-12-13 Siemens Ag CIRCUIT FOR MONITORING THE VOLTAGE OF A SELECTED DC POWER SUPPLY IN A REDUNDANT POWER SUPPLY SYSTEM
EP0458510A2 (en) * 1990-05-23 1991-11-27 Richard A. Martin Circuit for sustaining power supply output following momentary interruption of commercial A.C. power
US5771161A (en) * 1997-01-10 1998-06-23 Northrop Grumman Corporation Uninterruptable capability for an active power line conditioner
US5978236A (en) * 1997-01-31 1999-11-02 Silverline Power Conversion Llc Uninterruptible power supply with direction of DC electrical energy depending on predetermined ratio
US6108217A (en) * 1999-10-19 2000-08-22 Ivi Checkmate Ltd. Backup power circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3919183A1 (en) * 1989-06-12 1990-12-13 Siemens Ag CIRCUIT FOR MONITORING THE VOLTAGE OF A SELECTED DC POWER SUPPLY IN A REDUNDANT POWER SUPPLY SYSTEM
EP0458510A2 (en) * 1990-05-23 1991-11-27 Richard A. Martin Circuit for sustaining power supply output following momentary interruption of commercial A.C. power
US5771161A (en) * 1997-01-10 1998-06-23 Northrop Grumman Corporation Uninterruptable capability for an active power line conditioner
US5978236A (en) * 1997-01-31 1999-11-02 Silverline Power Conversion Llc Uninterruptible power supply with direction of DC electrical energy depending on predetermined ratio
US6108217A (en) * 1999-10-19 2000-08-22 Ivi Checkmate Ltd. Backup power circuit

Also Published As

Publication number Publication date
GB0328010D0 (en) 2004-01-07
WO2003001644A1 (en) 2003-01-03
GB2392027B (en) 2005-01-19

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20150621