JPS57134727A - Alternating current stabilized power supply - Google Patents

Alternating current stabilized power supply

Info

Publication number
JPS57134727A
JPS57134727A JP1954181A JP1954181A JPS57134727A JP S57134727 A JPS57134727 A JP S57134727A JP 1954181 A JP1954181 A JP 1954181A JP 1954181 A JP1954181 A JP 1954181A JP S57134727 A JPS57134727 A JP S57134727A
Authority
JP
Japan
Prior art keywords
load
power supply
capacitor
lamp
voltage
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.)
Pending
Application number
JP1954181A
Other languages
Japanese (ja)
Inventor
Hideyasu Endo
Tadahiro Eda
Satoshi Mori
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP1954181A priority Critical patent/JPS57134727A/en
Publication of JPS57134727A publication Critical patent/JPS57134727A/en
Pending 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
    • G05F1/45—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 being controlled rectifiers in series with the load
    • G05F1/455—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 being controlled rectifiers in series with the load with phase control

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

PURPOSE:To prevent the abnormal power conduction of a load, by connecting a time limit device which interrupts power supply when the repetition of an AC period of voltage application to a load continues more than a specified time, to a circuit detecting voltage application to the load. CONSTITUTION:A voltage applied to a lamp as a load 1 is picked up in the form of full wave rectification at a diode bridge BD1 of a load voltage detecting circuit 2. When the illumination of the lamp 1 starts, a transistor TQR3 of a timer circuit 5 is conductive, a TRQ4 cuts off and charging to a capacitor C3 is started. When a set time determined with a time constant consisting of a resistor R3 and a capacitor C3 elapses, a voltage across a capacitor C2 reaches a treshold potential at the terminal 6 of a timer IC, an output terminal 3 of the timer IC changes from high to low level and a TRQ5 becomes conductive. Thus, a relay RA is operated, a contact 4 is opened and the power supply to the lamp 1 is interrupted.
JP1954181A 1981-02-12 1981-02-12 Alternating current stabilized power supply Pending JPS57134727A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1954181A JPS57134727A (en) 1981-02-12 1981-02-12 Alternating current stabilized power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1954181A JPS57134727A (en) 1981-02-12 1981-02-12 Alternating current stabilized power supply

Publications (1)

Publication Number Publication Date
JPS57134727A true JPS57134727A (en) 1982-08-20

Family

ID=12002169

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1954181A Pending JPS57134727A (en) 1981-02-12 1981-02-12 Alternating current stabilized power supply

Country Status (1)

Country Link
JP (1) JPS57134727A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59151211A (en) * 1983-02-18 1984-08-29 Tokyo Rikoushiya:Kk Phase control type power adjusting circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59151211A (en) * 1983-02-18 1984-08-29 Tokyo Rikoushiya:Kk Phase control type power adjusting circuit

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