GB1182058A - Circuit Arrangement for the Overload and Short Circuit Protection of a D.C. Voltage Transformer - Google Patents

Circuit Arrangement for the Overload and Short Circuit Protection of a D.C. Voltage Transformer

Info

Publication number
GB1182058A
GB1182058A GB3554368A GB3554368A GB1182058A GB 1182058 A GB1182058 A GB 1182058A GB 3554368 A GB3554368 A GB 3554368A GB 3554368 A GB3554368 A GB 3554368A GB 1182058 A GB1182058 A GB 1182058A
Authority
GB
United Kingdom
Prior art keywords
chopper
transistor
winding
pulse
secondary winding
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.)
Expired
Application number
GB3554368A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1182058A publication Critical patent/GB1182058A/en
Expired 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • 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
    • 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
    • H02H7/1213—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 DC-DC converters
    • 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
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators

Landscapes

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

Abstract

1,182,058. Automatic voltage control. INTERNATIONAL STANDARD ELECTRIC CORP. July 25, 1967 [July 26, 1967], No.35543/68. Heading G3R. A voltage stabilizer of the chopper type is provided with an overload protection circuit which derives its operating signal not from a current monitoring resistor, as is usual, but from the secondary winding of a smoothing choke in the output circuit of the stabilizer. As shown, a load 6 is supplied from source terminals 1 by way of a chopper 2 and a filter including the primary winding 3 of a smoothing choke, a capacitor 5 and a diode 10. The chopper 2 is associated with a saw-tooth generator 7, a pulse-width modulator 8 and a pulse-shaper 9, and the mark-space ratio of the chopper is automatically controlled in known manner to compensate for output voltage variations as detected by a transistor 11 having its base connected to receive the output voltage, its emitter connected to a reference Zener diode 12, and its collector connected to the modulator 8 which is thus controlled by the error signal derived from transistor 11. The overload protection circuit comprises a secondary winding 4 of the smoothing choke, a variable resistor 4 and a transistor 13, these components being inter-connected as shown with the primary winding 3 and the pulseshaper 9. The resistor 14 can be adjusted so that the transistor 13 is rendered conductive when the current through the winding 3 exceeds a predeter - mined value, and the pulse-shaper 9 then acts to reduce the mark-space ratio of the chopper 2 whereby both the chopper and the load are protected against excess current. The primary winding 3 is closely coupled to and has the same number of turns as the secondary winding 4 so that any alternating components in the primary signal, which would otherwise affect operation of the transistor 13, are balanced out.
GB3554368A 1967-07-26 1968-07-25 Circuit Arrangement for the Overload and Short Circuit Protection of a D.C. Voltage Transformer Expired GB1182058A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEST027172 1967-07-26
DE19671613445 DE1613445B1 (en) 1967-07-26 1967-07-26 CIRCUIT ARRANGEMENT FOR OVERLOAD AND SHORT-CIRCUIT PROTECTION OF A DC VOLTAGE CONVERTER

Publications (1)

Publication Number Publication Date
GB1182058A true GB1182058A (en) 1970-02-25

Family

ID=25753678

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3554368A Expired GB1182058A (en) 1967-07-26 1968-07-25 Circuit Arrangement for the Overload and Short Circuit Protection of a D.C. Voltage Transformer

Country Status (3)

Country Link
CH (1) CH476409A (en)
DE (1) DE1613445B1 (en)
GB (1) GB1182058A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2243961A (en) * 1990-03-09 1991-11-13 Sunleigh Electrical Developmen DC-DC Power supply circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1042397B (en) * 1975-09-10 1980-01-30 Honeywell Inf Systems DYNAMIC CURRENT LIMITER CIRCUIT FOR SWITCHING REGULATION SYSTEMS

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL261610A (en) * 1960-02-24

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2243961A (en) * 1990-03-09 1991-11-13 Sunleigh Electrical Developmen DC-DC Power supply circuit

Also Published As

Publication number Publication date
CH476409A (en) 1969-07-31
DE1613445B1 (en) 1972-03-09

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