GB1123076A - Improvements in or relating to power supply regulation - Google Patents

Improvements in or relating to power supply regulation

Info

Publication number
GB1123076A
GB1123076A GB5293764A GB5293764A GB1123076A GB 1123076 A GB1123076 A GB 1123076A GB 5293764 A GB5293764 A GB 5293764A GB 5293764 A GB5293764 A GB 5293764A GB 1123076 A GB1123076 A GB 1123076A
Authority
GB
United Kingdom
Prior art keywords
circuit
transistor
series
power supply
resistor
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
GB5293764A
Inventor
Michael Bell
Anthony Leadbetter
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co 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 Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB5293764A priority Critical patent/GB1123076A/en
Publication of GB1123076A publication Critical patent/GB1123076A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

1,123,076. Protective arrangements. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. 23 Feb., 1966 [31 Dec., 1964], No. 52937/64. Heading H2K. [Also in Division G3] A regulated power supply comprises a switching transistor TX21, connected in series between an unregulated supply source and a load, controlled in dependence upon output voltage variations by a circuit including a first differential amplifier TX22, TX27 which drives a second differential amplifier TX24, TX25 to control the duty cycle of a free running multivibrator TX23, TX26 the output from which is applied over transistors TX28, TX29 to control the switching period of transistor TX21. An overload protection circuit OCPC for the power supply comprises a series resistor R41 associated with a differential amplifier TX11, TX12 and a mono-stable circuit TX13, TX14 the latter providing an output pulse, having a duration determined by the value of a capacitor C11, when the current through the series resistor exceeds a predetermined value. This output pulse is applied over diode D13 to transistor TX22, whereby the series transistor TX21 is switched off, the action of the multivibrator TX23, TX26 being inhibited for the duration of the said pulse. At the end of the predetermined period set by the capacitor 11, the mono-stable circuit reverts to its other state, and transistor TX21 is switched on and immediately switched off again for said predetermined period if the overload persists, this cycle continuing until the overload condition no longer obtains. An overvoltage protective circuit OVPC for the power supply includes a Schmidt trigger circuit TX1, TX2 which, when the voltage across a resistor R10 reaches a certain level, produces a pulse on the gate electrode of thyristor TY causing the thyristor to fire, the resulting current then being sufficient to blow a fuse F1 so that the regulating circuit is isolated from the supply source. The protective circuit also includes switches S1, S2, an indicating lamp LP and a resistor R2 arranged so that the circuit may be checked to see that it is in order, without blowing the fuse. The circuits OCPC and OVPC may also be provided in regulators of the type including a series transistor having a variable impedance.
GB5293764A 1964-12-31 1964-12-31 Improvements in or relating to power supply regulation Expired GB1123076A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5293764A GB1123076A (en) 1964-12-31 1964-12-31 Improvements in or relating to power supply regulation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5293764A GB1123076A (en) 1964-12-31 1964-12-31 Improvements in or relating to power supply regulation

Publications (1)

Publication Number Publication Date
GB1123076A true GB1123076A (en) 1968-08-14

Family

ID=10465901

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5293764A Expired GB1123076A (en) 1964-12-31 1964-12-31 Improvements in or relating to power supply regulation

Country Status (1)

Country Link
GB (1) GB1123076A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2291647A1 (en) * 1974-11-14 1976-06-11 Sony Corp PROTECTED CONTINUOUS FEEDING
GB2236919A (en) * 1989-10-04 1991-04-17 Kone Elevator Gmbh Overload and short-circuit protection of electric output drivers
US5091816A (en) * 1989-10-10 1992-02-25 Kone Elevator Gmbh Procedure and device for overload and short-circuit protection of output drivers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2291647A1 (en) * 1974-11-14 1976-06-11 Sony Corp PROTECTED CONTINUOUS FEEDING
GB2236919A (en) * 1989-10-04 1991-04-17 Kone Elevator Gmbh Overload and short-circuit protection of electric output drivers
GB2236919B (en) * 1989-10-04 1994-03-30 Kone Elevator Gmbh Overload and short-circuit protection circuit
US5091816A (en) * 1989-10-10 1992-02-25 Kone Elevator Gmbh Procedure and device for overload and short-circuit protection of output drivers

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