GB1038375A - Improvements in means for controlling phase-controlled switch circuitry - Google Patents

Improvements in means for controlling phase-controlled switch circuitry

Info

Publication number
GB1038375A
GB1038375A GB1566463A GB1566463A GB1038375A GB 1038375 A GB1038375 A GB 1038375A GB 1566463 A GB1566463 A GB 1566463A GB 1566463 A GB1566463 A GB 1566463A GB 1038375 A GB1038375 A GB 1038375A
Authority
GB
United Kingdom
Prior art keywords
circuit
trig1
trig2
cycle
transistor
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
GB1566463A
Inventor
Anthony Roy Leaverland
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.)
Parmeko Ltd
Original Assignee
Parmeko 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 Parmeko Ltd filed Critical Parmeko Ltd
Priority to GB1566463A priority Critical patent/GB1038375A/en
Publication of GB1038375A publication Critical patent/GB1038375A/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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/081—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters wherein the phase of the control voltage is adjustable with reference to the AC source

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

1,038,375. Transistor pulse circuits. PARMEKO Ltd. April 20, 1964 [April 20, 1963], No. 15664/63. Heading H3T. [Also in Division H2] A circuit TRIG1 is used to trigger the gate of a first silicon controlled rectifier controlling the drive and acceleration of an electric motor, whereas circuit TRIG2 triggers a second rectifier controlling the braking of the motor, as described in Specification 1,038,374. Capacitor C1 is charged when transistor VT1 is rendered conductive so that circuit TRIG1 produces a pulse output to trigger the first silicon-controlled rectifier, the voltage across circuit TRIG2 being removed. Current is maintained through circuit TRIG1 by Zener diode D1 until termination of the relevant half-cycle of the voltage applied to rectifier MR1. When there is no input to the transistor VT1, capacitor Cl is charged through resistor R2 to a value insufficient to fire the circuit TRIG1. At the end of a cycle of the supply voltage, the base potential of circuit TRIG2 falls as the voltage across diode D1 reaches zero, the base potential of circuit TRIG1 being prevented from falling by diode D4. Accordingly circuit TRIG2 will fire at the end of the cycle.
GB1566463A 1963-04-20 1963-04-20 Improvements in means for controlling phase-controlled switch circuitry Expired GB1038375A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1566463A GB1038375A (en) 1963-04-20 1963-04-20 Improvements in means for controlling phase-controlled switch circuitry

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1566463A GB1038375A (en) 1963-04-20 1963-04-20 Improvements in means for controlling phase-controlled switch circuitry

Publications (1)

Publication Number Publication Date
GB1038375A true GB1038375A (en) 1966-08-10

Family

ID=10063229

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1566463A Expired GB1038375A (en) 1963-04-20 1963-04-20 Improvements in means for controlling phase-controlled switch circuitry

Country Status (1)

Country Link
GB (1) GB1038375A (en)

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