JPS5778366A - Direct current stabilized power source circuit - Google Patents

Direct current stabilized power source circuit

Info

Publication number
JPS5778366A
JPS5778366A JP15311880A JP15311880A JPS5778366A JP S5778366 A JPS5778366 A JP S5778366A JP 15311880 A JP15311880 A JP 15311880A JP 15311880 A JP15311880 A JP 15311880A JP S5778366 A JPS5778366 A JP S5778366A
Authority
JP
Japan
Prior art keywords
capacitor
circuit
power supply
voltage
terminals
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
JP15311880A
Other languages
Japanese (ja)
Inventor
Mitsutake Sato
Michio Kono
Yoshikatsu Saito
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15311880A priority Critical patent/JPS5778366A/en
Publication of JPS5778366A publication Critical patent/JPS5778366A/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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Landscapes

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

Abstract

PURPOSE:To reduce the capacity of a commercial power supply as well as to dispense with a protective circuit by a method wherein the capacity of a smoothing capacitor is reduced, an auxiliary power supply is provided, and power is fed from the auxiliary power supply when the commercial AC input voltage is low. CONSTITUTION:A capacitor of small capacity is connected to the output terminal of the circuit 5 which rectifies the commercial AC input 4. An auxiliary power supply circuit is consisted of a diode D2, an inductance L and a capacitor C2. A DC-DC converter is consisted of a main transformer T, a transistor TR, a rectifying and smoothing circuit 2' and a pulse width controlling circuit 6. And, during the period when the voltage between both terminals of the capacitor C1 is low in accordance with an input waveform, the diode D1 is turned to conductive and power is fed from the capacitor C2 of the auxiliary powder supply circuit, and the capacitor C2 is charged while the voltage between both terminals is stabilized. Also, the capacitor C2 is charged while the voltage between both terminals of the capacitor C1 is high.
JP15311880A 1980-10-31 1980-10-31 Direct current stabilized power source circuit Pending JPS5778366A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15311880A JPS5778366A (en) 1980-10-31 1980-10-31 Direct current stabilized power source circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15311880A JPS5778366A (en) 1980-10-31 1980-10-31 Direct current stabilized power source circuit

Publications (1)

Publication Number Publication Date
JPS5778366A true JPS5778366A (en) 1982-05-17

Family

ID=15555359

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15311880A Pending JPS5778366A (en) 1980-10-31 1980-10-31 Direct current stabilized power source circuit

Country Status (1)

Country Link
JP (1) JPS5778366A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0442779A (en) * 1990-06-05 1992-02-13 Sanken Electric Co Ltd Power unit
JPH05276750A (en) * 1992-01-30 1993-10-22 Nec Corp Power supply circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0442779A (en) * 1990-06-05 1992-02-13 Sanken Electric Co Ltd Power unit
JPH05276750A (en) * 1992-01-30 1993-10-22 Nec Corp Power supply circuit

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