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GB940306A - Improvements in or relating to electric switching systems - Google Patents

Improvements in or relating to electric switching systems

Info

Publication number
GB940306A
GB940306A GB3422861A GB3422861A GB940306A GB 940306 A GB940306 A GB 940306A GB 3422861 A GB3422861 A GB 3422861A GB 3422861 A GB3422861 A GB 3422861A GB 940306 A GB940306 A GB 940306A
Authority
GB
United Kingdom
Prior art keywords
transistor
rectifiers
conductive
pulses
supply
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
GB3422861A
Inventor
Albert Edmund Jackets
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.)
General Electric Co PLC
Original Assignee
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB3422861A priority Critical patent/GB940306A/en
Publication of GB940306A publication Critical patent/GB940306A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
    • H03K17/722—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region with galvanic isolation between the control circuit and the output circuit
    • H03K17/723—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region with galvanic isolation between the control circuit and the output circuit using transformer coupling

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)
  • Ac-Ac Conversion (AREA)

Abstract

940,306. Transistor switching circuits. GENERAL ELECTRIC CO. Ltd. Sept. 25, 1962 [Sept. 25, 1961; Jan. 5, 1962], Nos. 34228/61 and 509/62. Heading H3T. [Also in Division H2] A supply system for switching A.C. to a load comprises controlling at least one semi-conductor controlled rectifier by means of a pulse generator, the recurrence frequency of the pulses being at least ten times the frequency of the A.C. supply. A load 6 is fed from an A.C. supply 3 over two reverse parallel connected silicon controlled rectifiers 8, 9, the gates of which rectifiers are fed with trains of pulses from a transformer 37 in the output stage of a pulse generator comprising a blocking oscillator 30 and a bi-stable trigger 17, 24. With switch 15 open transistor 24 is conductive rendering transistor 30 non-conductive so that no pulses are produced and consequently rectifiers 8, 9 are non-conductive. Closure of switch 15 biases the base of transistor 17 so that it conducts. Transistor 24 then becomes non- conductive whilst transistor 30 becomes conductive to produce pulses to fire the rectifiers 8, 9. Alternatively, one controlled rectifier may be used connected between one diagonal of a normal rectifier bridge network. The Complete Specification describes three phase arrangements wherein three controlled rectifiers are used, one in each phase line and each paralleled by a reversely poled semi-conductor diode or in which three controlled rectifiers are used connected in the same sense around the network on the side of the load remote from the supply terminals.
GB3422861A 1961-09-25 1961-09-25 Improvements in or relating to electric switching systems Expired GB940306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3422861A GB940306A (en) 1961-09-25 1961-09-25 Improvements in or relating to electric switching systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3422861A GB940306A (en) 1961-09-25 1961-09-25 Improvements in or relating to electric switching systems

Publications (1)

Publication Number Publication Date
GB940306A true GB940306A (en) 1963-10-30

Family

ID=10363004

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3422861A Expired GB940306A (en) 1961-09-25 1961-09-25 Improvements in or relating to electric switching systems

Country Status (1)

Country Link
GB (1) GB940306A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3277316A (en) * 1963-05-07 1966-10-04 Int Standard Electric Corp Electrical contact arrangements
US3321644A (en) * 1964-12-30 1967-05-23 Westinghouse Electric Corp Control device to provide rapid turnon potential for scr in response to inttiating signal
US3539822A (en) * 1967-10-26 1970-11-10 Us Army Semiconductor control circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3277316A (en) * 1963-05-07 1966-10-04 Int Standard Electric Corp Electrical contact arrangements
US3321644A (en) * 1964-12-30 1967-05-23 Westinghouse Electric Corp Control device to provide rapid turnon potential for scr in response to inttiating signal
US3539822A (en) * 1967-10-26 1970-11-10 Us Army Semiconductor control circuit

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