JPS5720821A - Constant direct current device - Google Patents

Constant direct current device

Info

Publication number
JPS5720821A
JPS5720821A JP9403780A JP9403780A JPS5720821A JP S5720821 A JPS5720821 A JP S5720821A JP 9403780 A JP9403780 A JP 9403780A JP 9403780 A JP9403780 A JP 9403780A JP S5720821 A JPS5720821 A JP S5720821A
Authority
JP
Japan
Prior art keywords
digital
converter
output
loop
direct current
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
JP9403780A
Other languages
Japanese (ja)
Inventor
Toshio Tanaka
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9403780A priority Critical patent/JPS5720821A/en
Publication of JPS5720821A publication Critical patent/JPS5720821A/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
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/575—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices characterised by the feedback circuit

Abstract

PURPOSE:To increase the accuracy of control, by adding a digital control loop to give a correction to an analog loop. CONSTITUTION:The ripple is eliminated through a filter 21 of a digital loop 20. This ripple is converted into a digital signal through an A/D converter 22 to be delivered to a digital subtractor 23. The subtractor 23 buts the output of a digital setter 8 to the output of the converter 22 to deliver it to a D/A converter 24. This output is integrated with a prescribed time constant through an integrator 25 and based on the analog signal output of the converter 24 to be delivered to an analog loop amplifier. Thus a digital correction control is carried out.
JP9403780A 1980-07-11 1980-07-11 Constant direct current device Pending JPS5720821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9403780A JPS5720821A (en) 1980-07-11 1980-07-11 Constant direct current device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9403780A JPS5720821A (en) 1980-07-11 1980-07-11 Constant direct current device

Publications (1)

Publication Number Publication Date
JPS5720821A true JPS5720821A (en) 1982-02-03

Family

ID=14099361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9403780A Pending JPS5720821A (en) 1980-07-11 1980-07-11 Constant direct current device

Country Status (1)

Country Link
JP (1) JPS5720821A (en)

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