JPS57146324A - Alternating current constant voltage power supply - Google Patents

Alternating current constant voltage power supply

Info

Publication number
JPS57146324A
JPS57146324A JP3078881A JP3078881A JPS57146324A JP S57146324 A JPS57146324 A JP S57146324A JP 3078881 A JP3078881 A JP 3078881A JP 3078881 A JP3078881 A JP 3078881A JP S57146324 A JPS57146324 A JP S57146324A
Authority
JP
Japan
Prior art keywords
voltage
microcomputer
power supply
phase
converter
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
JP3078881A
Other languages
Japanese (ja)
Inventor
Masao Hosaka
Yoshitaka Ogino
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 JP3078881A priority Critical patent/JPS57146324A/en
Publication of JPS57146324A publication Critical patent/JPS57146324A/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

Abstract

PURPOSE:To set an effective load voltage to a reference set constant voltage accurately, by controlling the phase of an AC power supply with a microcomputer. CONSTITUTION:A fluctuated voltage of an AC power supply E is detected with a fluctuation voltage detecting circuit 1 and the voltage is converted into a digital quantity at an A/D converter 2. A microcomputer 3 operates the amount of phase control based on an input from the A/D converter. On the other hand, zero-cross pulses from a zero cross pulse generating circuit 7 start a counter 8 to count a phase angle. When this counting value is coincident with the result of the above operation, the microcomputer gives a phase controlling signal to a switching circuit 4 to conduct it. A voltage applied to a load 5 is detected with a detecting circuit 6 and inputted to the microcomputer 3 via the A/D converter 2 and the difference with an effective load voltage is operated and the phase control amount taking into consideration the amount of compensation is operated to control the switching circuit 4. Thus, the effective load voltage can be maintained to a reference set voltage.
JP3078881A 1981-03-04 1981-03-04 Alternating current constant voltage power supply Pending JPS57146324A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3078881A JPS57146324A (en) 1981-03-04 1981-03-04 Alternating current constant voltage power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3078881A JPS57146324A (en) 1981-03-04 1981-03-04 Alternating current constant voltage power supply

Publications (1)

Publication Number Publication Date
JPS57146324A true JPS57146324A (en) 1982-09-09

Family

ID=12313406

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3078881A Pending JPS57146324A (en) 1981-03-04 1981-03-04 Alternating current constant voltage power supply

Country Status (1)

Country Link
JP (1) JPS57146324A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59127122A (en) * 1983-01-10 1984-07-21 Canon Inc Load controller
WO2004073148A3 (en) * 2002-11-06 2004-12-29 Crydom Ltd Ac voltage regulator apparatus and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59127122A (en) * 1983-01-10 1984-07-21 Canon Inc Load controller
WO2004073148A3 (en) * 2002-11-06 2004-12-29 Crydom Ltd Ac voltage regulator apparatus and method

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