JPS57147720A - Power source circuit - Google Patents

Power source circuit

Info

Publication number
JPS57147720A
JPS57147720A JP3284981A JP3284981A JPS57147720A JP S57147720 A JPS57147720 A JP S57147720A JP 3284981 A JP3284981 A JP 3284981A JP 3284981 A JP3284981 A JP 3284981A JP S57147720 A JPS57147720 A JP S57147720A
Authority
JP
Japan
Prior art keywords
voltage
variation
taps
tap
power transformer
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
JP3284981A
Other languages
Japanese (ja)
Inventor
Isamu Tsunomura
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.)
Brother Industries Ltd
Original Assignee
Brother Industries 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 Brother Industries Ltd filed Critical Brother Industries Ltd
Priority to JP3284981A priority Critical patent/JPS57147720A/en
Publication of JPS57147720A publication Critical patent/JPS57147720A/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
    • G05F1/14—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices
    • G05F1/16—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices combined with discharge tubes or semiconductor devices
    • G05F1/20—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices combined with discharge tubes or semiconductor devices semiconductor devices only

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 reduce variation in secondary voltage with a primary voltage by detecting variation in primary voltage by variation in voltage between taps of a power transformer, and switching the taps by comparing the detected voltage with a reference voltage. CONSTITUTION:A voltage between the high-voltage tap 4 and low-voltage tape 5 of a power transformer 13 is rectified and smoothed to detect variation in the AC input voltage of a power line 1 in the form of a DC voltage, and a voltage generated by dividing the detected voltage is compared with a reference voltage by an operational amplifier 30. Then, a changeover switch 2 is connected to the high-voltage tap 4 when the divided voltage is higher, or to the low-voltage tap 5 when not, thus suppressing the secondary voltage variation of a power transformer 3. So that the output of the operational amplifier 30 has hysteresis, a peripheral circuit is constituted, and oscillation occurring during the switching of the taps is prevented.
JP3284981A 1981-03-06 1981-03-06 Power source circuit Pending JPS57147720A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3284981A JPS57147720A (en) 1981-03-06 1981-03-06 Power source circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3284981A JPS57147720A (en) 1981-03-06 1981-03-06 Power source circuit

Publications (1)

Publication Number Publication Date
JPS57147720A true JPS57147720A (en) 1982-09-11

Family

ID=12370276

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3284981A Pending JPS57147720A (en) 1981-03-06 1981-03-06 Power source circuit

Country Status (1)

Country Link
JP (1) JPS57147720A (en)

Similar Documents

Publication Publication Date Title
JPS5553710A (en) Power unit
MY103302A (en) Direct current power supply
JPS6439222A (en) Circuit breaker
JPS57147720A (en) Power source circuit
JPS561270A (en) Direct current welding electric power source device
JPS5713303A (en) Device for detecting position
JPS5743209A (en) Regulated power supply
JPS57208870A (en) Protective device for service interruption of voltage type inverter
JPS57132766A (en) Dc power source circuit
JPS542954A (en) Powe source circuit of direct current arc welding equipment
JPS5783164A (en) Converter
JPS5453854A (en) Relay circuit
JPS57173378A (en) Operating method for inverter
JPS5569822A (en) Power unit
JPS5746681A (en) Inverter circuit
JPS54101125A (en) Parallel closing transformer with ac-dc changeover tap
JPS5759478A (en) Inverter
JPS5540020A (en) Dc power source device for both welding and gouging
JPS5597182A (en) Switching regulator
JPS56101726A (en) Dc current transformer
JPS56150975A (en) Dc/ac converting device for power source use
JPS5457650A (en) Constant current power source device
JPS56151363A (en) Monitoring device for power source voltage
JPS57109016A (en) Current feedback driving type converter power source device
JPS54145949A (en) Automatic voltage fluctuation range controller