JPS57134729A - Direct current power supply - Google Patents

Direct current power supply

Info

Publication number
JPS57134729A
JPS57134729A JP56019664A JP1966481A JPS57134729A JP S57134729 A JPS57134729 A JP S57134729A JP 56019664 A JP56019664 A JP 56019664A JP 1966481 A JP1966481 A JP 1966481A JP S57134729 A JPS57134729 A JP S57134729A
Authority
JP
Japan
Prior art keywords
current
output
light load
impedance
reduce
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
JP56019664A
Other languages
Japanese (ja)
Inventor
Kenjo Yamano
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56019664A priority Critical patent/JPS57134729A/en
Publication of JPS57134729A publication Critical patent/JPS57134729A/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
    • H02M3/33561—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 having more than one ouput with independent control

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE:To improve the stability of an output voltage at no load and a light load and to reduce the loss other than the light load, by providing a variable impedance element changed according to an output current and keeping the output current more than a prescribed value equivallently. CONSTITUTION:A voltage proportional to an AC component of a collector current of a transistor (TR)7 is induced in the secondary winding of an output transformer 6 and a current detecting transformer 5. An output current is detected at the current detecting transformer 5 and a prescribed value or more current flows by reducing an impedance of a variable impedance element 16, i.e., the impedance of a TR16 at a light load through the output of a control circuit 3 consisting of a rectifying circuit 23, a differential amplifier 24 and a reference voltage 25, allowing to reduce the variance in the output voltage. In case other than the light load, the impedance of the TR16 is increased and the current flowing to it is decreased, allowing to reduce power loss of the TR16.
JP56019664A 1981-02-13 1981-02-13 Direct current power supply Pending JPS57134729A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56019664A JPS57134729A (en) 1981-02-13 1981-02-13 Direct current power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56019664A JPS57134729A (en) 1981-02-13 1981-02-13 Direct current power supply

Publications (1)

Publication Number Publication Date
JPS57134729A true JPS57134729A (en) 1982-08-20

Family

ID=12005502

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56019664A Pending JPS57134729A (en) 1981-02-13 1981-02-13 Direct current power supply

Country Status (1)

Country Link
JP (1) JPS57134729A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5972980A (en) * 1982-10-20 1984-04-25 Hitachi Ltd Stabilized dc power source
WO1997033361A1 (en) * 1996-03-08 1997-09-12 Siemens Aktiengesellschaft Circuit arrangement for switching network sections with several load-independent output voltages

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5972980A (en) * 1982-10-20 1984-04-25 Hitachi Ltd Stabilized dc power source
JPH0124029B2 (en) * 1982-10-20 1989-05-09 Hitachi Seisakusho Kk
WO1997033361A1 (en) * 1996-03-08 1997-09-12 Siemens Aktiengesellschaft Circuit arrangement for switching network sections with several load-independent output voltages

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