GB1381876A - Switching circuits for controlling the supply of power to a load - Google Patents

Switching circuits for controlling the supply of power to a load

Info

Publication number
GB1381876A
GB1381876A GB3605771A GB3605771A GB1381876A GB 1381876 A GB1381876 A GB 1381876A GB 3605771 A GB3605771 A GB 3605771A GB 3605771 A GB3605771 A GB 3605771A GB 1381876 A GB1381876 A GB 1381876A
Authority
GB
United Kingdom
Prior art keywords
triac
capacitor
circuit
controlling
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
GB3605771A
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Priority to GB3605771A priority Critical patent/GB1381876A/en
Priority to US00214119A priority patent/US3763395A/en
Priority to CA144,635A priority patent/CA1005513A/en
Priority to IT26282/72A priority patent/IT956875B/en
Priority to ES404736A priority patent/ES404736A1/en
Priority to DE2236427A priority patent/DE2236427B2/en
Priority to FR7227296A priority patent/FR2149142A5/fr
Priority to JP47076416A priority patent/JPS525982B1/ja
Priority to ES415918A priority patent/ES415918A1/en
Publication of GB1381876A publication Critical patent/GB1381876A/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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/04—Controlling
    • H05B39/08—Controlling by shifting phase of trigger voltage applied to gas-filled controlling tubes also in controlled semiconductor devices
    • H05B39/083—Controlling by shifting phase of trigger voltage applied to gas-filled controlling tubes also in controlled semiconductor devices by the variation-rate of light intensity

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electrical Variables (AREA)
  • Power Conversion In General (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Thyristor Switches And Gates (AREA)
  • Ac-Ac Conversion (AREA)

Abstract

1381876 Lamp dimming circuits RCA CORPORATION 6 July 1972 [30 July 1971(2)] 36057/71 and 36058/71 Heading H2H [Also in Division H3] A switching circuit for controlling the supply of A.C. power to an incandescent lamp 680 comprises a triac 640, a time constant circuit for controlling the phase angle at which the triac is fired, a radio frequency interference suppression filter 610 and a circuit 630 for preventing commutation of the triac into a non-conductive state when it is conducting. When the voltage across a capacitor 670 reaches the breakdown voltage of a diac 614, the capacitor discharges into the gate electrode G to fire the triac. The oscillatory current generated by the switching transient in the resonant circuit formed by the triac and the filter may be of a polarity and sufficient amplitude to tend to switch off the triac. However this is prevented by the circuit 630 including a capacitor 631 and a resistor 632 via which the energy stored in an inductor 612 enables a potential to be applied between the electrodes G, T 1 of the triac. The capacitor 631 has a value such that it is incapable of triggering the triac from the supply 650 when the triac is off.
GB3605771A 1971-07-30 1971-07-30 Switching circuits for controlling the supply of power to a load Expired GB1381876A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
GB3605771A GB1381876A (en) 1971-07-30 1971-07-30 Switching circuits for controlling the supply of power to a load
US00214119A US3763395A (en) 1971-07-30 1971-12-30 Interference suppression circuits
CA144,635A CA1005513A (en) 1971-07-30 1972-06-13 Interference suppression circuits
IT26282/72A IT956875B (en) 1971-07-30 1972-06-27 CIRCUIT FOR THE SUPPRESSION OF INTERFERENCE
ES404736A ES404736A1 (en) 1971-07-30 1972-07-11 Switching circuits for controlling the supply of power to a load
DE2236427A DE2236427B2 (en) 1971-07-30 1972-07-25 Device for controlling a triac
FR7227296A FR2149142A5 (en) 1971-07-30 1972-07-28
JP47076416A JPS525982B1 (en) 1971-07-30 1972-07-29
ES415918A ES415918A1 (en) 1971-07-30 1973-06-14 Switching circuits for controlling the supply of power to a load

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3605771A GB1381876A (en) 1971-07-30 1971-07-30 Switching circuits for controlling the supply of power to a load
GB3605871 1971-07-30

Publications (1)

Publication Number Publication Date
GB1381876A true GB1381876A (en) 1975-01-29

Family

ID=26262968

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3605771A Expired GB1381876A (en) 1971-07-30 1971-07-30 Switching circuits for controlling the supply of power to a load

Country Status (6)

Country Link
JP (1) JPS525982B1 (en)
DE (1) DE2236427B2 (en)
ES (2) ES404736A1 (en)
FR (1) FR2149142A5 (en)
GB (1) GB1381876A (en)
IT (1) IT956875B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2228151A (en) * 1989-02-13 1990-08-15 Lutron Electronics Co Quasi-constant gate drive circuit for thyristor
GB2269492A (en) * 1992-08-05 1994-02-09 Stephen Leslie Ballantyne Power reducing circuit for A.C. Load

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE7707771L (en) * 1977-07-05 1979-01-06 Klippberg Olle Knut METHOD OF POWERING RADIATION-GENERATING DEVICES AND DEVICE FOR IMPLEMENTING THE KIT
FR2448805A1 (en) * 1979-02-08 1980-09-05 Silicium Semiconducteur Ssc Light dimmer circuit with series triac and inductor - is shunted by oscillation suppressing capacitor in series with resistive voltage divider
FR2504757A1 (en) * 1981-04-27 1982-10-29 Thomson Csf SELF-ADAPTIVE METHOD AND DEVICE FOR PRIMING A TRIAC
EP2741587B1 (en) * 2012-12-04 2017-07-19 Hager Controls SAS Device for varying the intensity of the light in luminous charges

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2228151A (en) * 1989-02-13 1990-08-15 Lutron Electronics Co Quasi-constant gate drive circuit for thyristor
GB2269492A (en) * 1992-08-05 1994-02-09 Stephen Leslie Ballantyne Power reducing circuit for A.C. Load

Also Published As

Publication number Publication date
ES404736A1 (en) 1975-11-16
ES415918A1 (en) 1976-03-16
DE2236427A1 (en) 1973-03-15
FR2149142A5 (en) 1973-03-23
JPS4824243A (en) 1973-03-29
JPS525982B1 (en) 1977-02-18
DE2236427B2 (en) 1975-11-13
IT956875B (en) 1973-10-10

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Legal Events

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