SE9503099D0 - Procedure for limiting the output current of switched flyback-type power units in overload situations and switched flyback-type power units - Google Patents

Procedure for limiting the output current of switched flyback-type power units in overload situations and switched flyback-type power units

Info

Publication number
SE9503099D0
SE9503099D0 SE9503099A SE9503099A SE9503099D0 SE 9503099 D0 SE9503099 D0 SE 9503099D0 SE 9503099 A SE9503099 A SE 9503099A SE 9503099 A SE9503099 A SE 9503099A SE 9503099 D0 SE9503099 D0 SE 9503099D0
Authority
SE
Sweden
Prior art keywords
output current
type power
power units
switched
overload situations
Prior art date
Application number
SE9503099A
Other languages
Swedish (sv)
Other versions
SE9503099L (en
SE511444C2 (en
Inventor
Goesta Baarman
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 SE9503099L publication Critical patent/SE9503099L/en
Publication of SE9503099D0 publication Critical patent/SE9503099D0/en
Publication of SE511444C2 publication Critical patent/SE511444C2/en

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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
    • H02H7/1227—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to abnormalities in the output circuit, e.g. short circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention relates to a method for limiting the output current (Iout) of a switched-mode power supply of flyback type in overload situations and to a switched-mode power supply of flyback type. In accordance with the method, the output current (Iout) is limited by means of pulse width modulation (PWM) by adjusting, by means of a control circuit (13) known per se, the ratio of the duration of the ON and OFF phases of the switch (SW) of the primary circuit. In order for the output current not to increase inordinately in overload situations, the voltage (Vs) which is present on the primary side of the transformer (10) and which is dependant on the output voltage (Uout) of the power supply is utilized to control a current generator (21), and output current (Icc) of which is used to form a control signal for the control circuit (13). <IMAGE>
SE9503099A 1993-03-15 1995-09-08 Procedure for limiting the output current of switched flyback-type power units in overload situations and switched flyback-type power units SE511444C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI931137A FI92892C (en) 1993-03-15 1993-03-15 Method for limiting the output current of a flyback type switch mode power supply in overload situations and a flyback type switch mode power supply
PCT/FI1994/000090 WO1994022207A1 (en) 1993-03-15 1994-03-11 A method for limiting the output current of a switched-mode power supply of flyback type in overload situations, and a switched-mode power supply of flyback type

Publications (3)

Publication Number Publication Date
SE9503099L SE9503099L (en) 1995-09-08
SE9503099D0 true SE9503099D0 (en) 1995-09-09
SE511444C2 SE511444C2 (en) 1999-10-04

Family

ID=8537548

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9503099A SE511444C2 (en) 1993-03-15 1995-09-08 Procedure for limiting the output current of switched flyback-type power units in overload situations and switched flyback-type power units

Country Status (6)

Country Link
AU (1) AU6209294A (en)
DE (1) DE4491577T1 (en)
FI (1) FI92892C (en)
GB (1) GB2290889B (en)
SE (1) SE511444C2 (en)
WO (1) WO1994022207A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT406319B (en) * 1995-10-24 2000-04-25 Siemens Ag Oesterreich LOCK CONVERTER
US20040155639A1 (en) * 2001-06-29 2004-08-12 Mobers Antonius Maria Gerardus Current mode controlled switched mode power supply
CN1452308A (en) * 2002-04-18 2003-10-29 姜涛 Environment protection switch power supply
US7304870B2 (en) * 2002-11-07 2007-12-04 Nxp B.V. Power converter
AT506273B1 (en) 2007-12-20 2012-03-15 Siemens Ag METHOD FOR OPERATING A SWITCHING TRANSFORMER

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4425611A (en) * 1981-10-16 1984-01-10 Rca Corporation Switching voltage regulators with output voltages indirectly regulated respective to directly regulated boosted input voltages
DE58904457D1 (en) * 1988-03-25 1993-07-01 Siemens Ag METHOD FOR LIMITING THE OUTPUT CURRENT OF A POWER SUPPLY.

Also Published As

Publication number Publication date
SE9503099L (en) 1995-09-08
GB9518863D0 (en) 1995-11-22
DE4491577T1 (en) 1996-02-22
AU6209294A (en) 1994-10-11
FI92892C (en) 1995-01-10
FI92892B (en) 1994-09-30
WO1994022207A1 (en) 1994-09-29
GB2290889B (en) 1996-07-17
SE511444C2 (en) 1999-10-04
FI931137A0 (en) 1993-03-15
GB2290889A (en) 1996-01-10

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Legal Events

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NUG Patent has lapsed