GB862099A - Improvements in or relating to electrical equipments incorporating transistors - Google Patents

Improvements in or relating to electrical equipments incorporating transistors

Info

Publication number
GB862099A
GB862099A GB22929/58A GB2292958A GB862099A GB 862099 A GB862099 A GB 862099A GB 22929/58 A GB22929/58 A GB 22929/58A GB 2292958 A GB2292958 A GB 2292958A GB 862099 A GB862099 A GB 862099A
Authority
GB
United Kingdom
Prior art keywords
voltage
resistance
terminal
relay
potentiometer
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
GB22929/58A
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.)
DAVID ALLEN SCOTT DRYBROUGH
General Electric Co PLC
Original Assignee
DAVID ALLEN SCOTT DRYBROUGH
General Electric Co PLC
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 DAVID ALLEN SCOTT DRYBROUGH, General Electric Co PLC filed Critical DAVID ALLEN SCOTT DRYBROUGH
Priority to GB22929/58A priority Critical patent/GB862099A/en
Publication of GB862099A publication Critical patent/GB862099A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/40—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices
    • G05F1/44—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • 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
    • H02M3/338—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 in a self-oscillating arrangement
    • H02M3/3385—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 in a self-oscillating arrangement with automatic control of output voltage or current
    • H02M3/3387—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 in a self-oscillating arrangement with automatic control of output voltage or current in a push-pull configuration
    • H02M3/3388—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 in a self-oscillating arrangement with automatic control of output voltage or current in a push-pull configuration of the parallel type

Abstract

862,099. Transistor circuits. GENERAL ELECTRIC CO. Ltd., and DRYBROUGH, D. A. S. July 16, 1959 [July 17, 1958], No. 22929/58. Class 40(6) [Also in Group XXXV] A unit 8 to protect the transistors in electrical equipment against source voltage rises appreciably above the nominal value, includes negative and positive D.C. input terminals 9, 10, respectively across which are two circuits in parallel, one of which comprises a variable potentiometer 17 and the other a resistance 19 and a voltage stabilising device 20 in series. Terminal 9 is connected directly to output terminal 11 and terminal 10 is connected through a resistance 13, shunted by normally closed contacts 14 of a relay 15, to output terminal 12. The unit is completed by a P-N-P junction transistor 16 with its base connected to a tapping on potentiometer 17, its collector connected through the operating coil of relay 15 to terminal 9 and its emitter connected, through a temperature stabilising low valued resistance 18, to the common terminal of resistance 19 and voltage stabilising device 20. At a certain excess voltage, predetermined by the setting of potentiometer 17, the magnitude of the collector current through coil of relay 15 becomes sufficient to operate the relay and open contact 14, thus bringing resistance 13 into circuit with a corresponding decrease in voltage to restore the output voltage across terminals 11, 12 to the nominal source voltage value. Terminals 11, 12 are connected to the input terminals of electrical equipment to which the protection device is suited, typical equipment being a D.C. " step-up " converter having circuit 1 which includes an oscillator having the protected transistors 2, 3. In another embodiment, unit 8 is provided with a series of control steps by the inclusion of one or more further resistors, with corresponding further relays, arranged to operate in succession as the source voltage progressively increases above its nominal value.
GB22929/58A 1958-07-17 1958-07-17 Improvements in or relating to electrical equipments incorporating transistors Expired GB862099A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB22929/58A GB862099A (en) 1958-07-17 1958-07-17 Improvements in or relating to electrical equipments incorporating transistors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22929/58A GB862099A (en) 1958-07-17 1958-07-17 Improvements in or relating to electrical equipments incorporating transistors

Publications (1)

Publication Number Publication Date
GB862099A true GB862099A (en) 1961-03-01

Family

ID=10187342

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22929/58A Expired GB862099A (en) 1958-07-17 1958-07-17 Improvements in or relating to electrical equipments incorporating transistors

Country Status (1)

Country Link
GB (1) GB862099A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3206695A (en) * 1961-11-13 1965-09-14 Magnavox Co Overvoltage protection circuit for power converters
US3935527A (en) * 1974-08-14 1976-01-27 Bell Telephone Laboratories, Incorporated Inrush current limit circuit with reset response to lowered input voltage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3206695A (en) * 1961-11-13 1965-09-14 Magnavox Co Overvoltage protection circuit for power converters
US3935527A (en) * 1974-08-14 1976-01-27 Bell Telephone Laboratories, Incorporated Inrush current limit circuit with reset response to lowered input voltage

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