JPS56121364A - Power source circuit - Google Patents

Power source circuit

Info

Publication number
JPS56121364A
JPS56121364A JP2447780A JP2447780A JPS56121364A JP S56121364 A JPS56121364 A JP S56121364A JP 2447780 A JP2447780 A JP 2447780A JP 2447780 A JP2447780 A JP 2447780A JP S56121364 A JPS56121364 A JP S56121364A
Authority
JP
Japan
Prior art keywords
voltage
power source
switching element
coil
capacitor
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
JP2447780A
Other languages
Japanese (ja)
Inventor
Masatoshi Maeda
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP2447780A priority Critical patent/JPS56121364A/en
Publication of JPS56121364A publication Critical patent/JPS56121364A/en
Pending 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/40—Means for preventing magnetic saturation
    • 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE:To prevent the burning of a switching element in a power source circuit by generating a predetermined constant voltage higher than the voltage of a DC power source from a smoothing capacitor and varying the ON-time of the switching element when the voltage of the DC power source varies, thereby reducing the saturation of a coil. CONSTITUTION:A switching element 6 connected through a coil 5 to a DC power source 1 is switched by an oscillator circuit 3 for oscillating by comparing the voltage of a capacitor 3f charged by the power source 1 with a reference voltage produced from the output of a constant-voltage circuit 2 for maintaining the voltage of the power source 1 at a constant voltage. Since a predetermined voltage higher than the voltage of the power source can be produced at a smoothing capacitor 10 by stopping the switching operation of the switching element 6 through a reverse current preventing element 9 only when the voltage of the capacitor 10 becomes higher than a predetermined value and the on time of the switching element is varied when the voltage of the power source varies, the saturation of the coil can be reduced to prevent the burning of the switching element.
JP2447780A 1980-02-27 1980-02-27 Power source circuit Pending JPS56121364A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2447780A JPS56121364A (en) 1980-02-27 1980-02-27 Power source circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2447780A JPS56121364A (en) 1980-02-27 1980-02-27 Power source circuit

Publications (1)

Publication Number Publication Date
JPS56121364A true JPS56121364A (en) 1981-09-24

Family

ID=12139245

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2447780A Pending JPS56121364A (en) 1980-02-27 1980-02-27 Power source circuit

Country Status (1)

Country Link
JP (1) JPS56121364A (en)

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