GB2294370A - Power supply system - Google Patents

Power supply system

Info

Publication number
GB2294370A
GB2294370A GB9526198A GB9526198A GB2294370A GB 2294370 A GB2294370 A GB 2294370A GB 9526198 A GB9526198 A GB 9526198A GB 9526198 A GB9526198 A GB 9526198A GB 2294370 A GB2294370 A GB 2294370A
Authority
GB
United Kingdom
Prior art keywords
switched
mode power
power supplies
power supply
common
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
GB9526198A
Other versions
GB9526198D0 (en
GB2294370B (en
Inventor
Seppo Vimpari
Pekka Haekli
Kelae Hannu M
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.)
Nokia Oyj
Original Assignee
Nokia Telecommunications Oy
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 Nokia Telecommunications Oy filed Critical Nokia Telecommunications Oy
Publication of GB9526198D0 publication Critical patent/GB9526198D0/en
Publication of GB2294370A publication Critical patent/GB2294370A/en
Application granted granted Critical
Publication of GB2294370B publication Critical patent/GB2294370B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/36—Means for starting or stopping converters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems

Abstract

The invention relates to a power supply system, comprising a plurality of separate switched-mode power supplies (34) fed from a common voltage source. The switched-mode power supplies comprise a transformer (10), through which power is transferred from a primary circuit to a secondary circuit, and a control circuit (13) known per se, which controls a switch (SW) of the primary circuit and by means of which the mutual length of the ON and OFF periods of the switch is adjusted, which control circuit is positioned in the secondary circuit of a switched-mode power supply. In order to provide a system as simple as possible, without the drawbacks caused by feedback, the system comprises for several switched-mode power supplies (34) a common auxiliary voltage source (33), serving as a common starting power supply for said switched-mode power supplies, whereby in said switched-mode power supplies an auxiliary voltage (Uap) to be obtained from said common auxiliary voltage source (33) is operatively connected to form the starting voltage of the control circuit (13). <IMAGE>
GB9526198A 1993-06-23 1994-06-22 Power supply system Expired - Fee Related GB2294370B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI932918A FI94197C (en) 1993-06-23 1993-06-23 Power supply system
PCT/FI1994/000281 WO1995000999A1 (en) 1993-06-23 1994-06-22 Power supply system

Publications (3)

Publication Number Publication Date
GB9526198D0 GB9526198D0 (en) 1996-02-21
GB2294370A true GB2294370A (en) 1996-04-24
GB2294370B GB2294370B (en) 1997-09-03

Family

ID=8538201

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9526198A Expired - Fee Related GB2294370B (en) 1993-06-23 1994-06-22 Power supply system

Country Status (5)

Country Link
AU (1) AU7074794A (en)
DE (1) DE4494360T1 (en)
FI (1) FI94197C (en)
GB (1) GB2294370B (en)
WO (1) WO1995000999A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2860862A3 (en) * 2013-10-11 2015-07-29 Micropatent B.V. Voltage transformer assembly

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0443246A2 (en) * 1990-02-20 1991-08-28 Electronic Craftsmen Limited Switch-mode power supply

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0443246A2 (en) * 1990-02-20 1991-08-28 Electronic Craftsmen Limited Switch-mode power supply

Also Published As

Publication number Publication date
FI94197B (en) 1995-04-13
AU7074794A (en) 1995-01-17
FI932918A (en) 1994-12-24
FI94197C (en) 1995-07-25
WO1995000999A1 (en) 1995-01-05
FI932918A0 (en) 1993-06-23
GB9526198D0 (en) 1996-02-21
GB2294370B (en) 1997-09-03
DE4494360T1 (en) 1996-06-27

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020622