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GB1288790A - - Google Patents

Info

Publication number
GB1288790A
GB1288790A GB1288790DA GB1288790A GB 1288790 A GB1288790 A GB 1288790A GB 1288790D A GB1288790D A GB 1288790DA GB 1288790 A GB1288790 A GB 1288790A
Authority
GB
United Kingdom
Prior art keywords
capacitor
voltage
triac
reference voltage
comparator
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
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 filed Critical
Publication of GB1288790A publication Critical patent/GB1288790A/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
    • H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC
    • H02M5/04—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters
    • H02M5/22—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/25—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M5/257—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M5/2573—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with control circuit

Landscapes

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

Abstract

1288790 Switching circuits for AC loads MARCONI CO Ltd 20 Nov 1970 [23 Dec 1969] 62738/69 Heading H2H An A.C. switching circuit comprises a triac 3, a reference voltage source 6, a capacitor 13 and a comparator 5 for comparing the reference voltage with the voltage across the capacitor to produce a trigger voltage for the triac. The capacitor 13 is charged via a rectifier circuit 12 connected to the A.C. supply terminal 1 and transistors 8, 9, the voltage across the capacitor comprising one input to the comparator 5. An electronic switch 14 discharges the capacitor at each zero crossing of A.C. supply and the linear variation of the potentiometer 6 causes a linear variation of the mean voltage supplied to load 2, the triac being fired when the voltage across the capacitor exceeds the reference voltage.
GB1288790D 1969-12-23 1969-12-23 Expired GB1288790A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6273869 1969-12-23

Publications (1)

Publication Number Publication Date
GB1288790A true GB1288790A (en) 1972-09-13

Family

ID=10488443

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1288790D Expired GB1288790A (en) 1969-12-23 1969-12-23

Country Status (2)

Country Link
DE (1) DE2032949A1 (en)
GB (1) GB1288790A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4453123A (en) * 1980-10-16 1984-06-05 Erkman Ronald E System for providing a firing signal to an electrical power switch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2575348B1 (en) * 1984-12-20 1988-02-12 Rv Electronique ELECTRONIC DIMMER CONTROL DEVICE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4453123A (en) * 1980-10-16 1984-06-05 Erkman Ronald E System for providing a firing signal to an electrical power switch

Also Published As

Publication number Publication date
DE2032949A1 (en) 1972-01-05

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee