JPS5694969A - Power unit - Google Patents

Power unit

Info

Publication number
JPS5694969A
JPS5694969A JP17067779A JP17067779A JPS5694969A JP S5694969 A JPS5694969 A JP S5694969A JP 17067779 A JP17067779 A JP 17067779A JP 17067779 A JP17067779 A JP 17067779A JP S5694969 A JPS5694969 A JP S5694969A
Authority
JP
Japan
Prior art keywords
scr
resistor
power source
charging
condenser
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
JP17067779A
Other languages
Japanese (ja)
Inventor
Tadashi Fujizu
Hideaki Honma
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 JP17067779A priority Critical patent/JPS5694969A/en
Publication of JPS5694969A publication Critical patent/JPS5694969A/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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)

Abstract

PURPOSE:To prevent an inrush current at turning a power source ON by a simple circuit by a method wherein when a charging voltage of a condenser reaches a set voltage, a circuit through which resistors are shortened is used. CONSTITUTION:In closing of an AC power source, a thyristor SCR is in OFF state, and charging to an input condenser C is started through a resistor R2 connected in parallel to the SCR and a protective resistor R1 connected in series to a rectifier circuit. When the voltages at both ends of the input condenser C reaches the set voltage after the start of charging, a transistor Q1 is turned ON so that the SCR is turned ON to allow the input condenser C to be charged through the resistor R1 and SCR and also make currents to be supplied to a load. Accordingly, with the resistor R2 selected for an appropriate value, the excess inrush currents in closing of the AC power source can be prevented.
JP17067779A 1979-12-27 1979-12-27 Power unit Pending JPS5694969A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17067779A JPS5694969A (en) 1979-12-27 1979-12-27 Power unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17067779A JPS5694969A (en) 1979-12-27 1979-12-27 Power unit

Publications (1)

Publication Number Publication Date
JPS5694969A true JPS5694969A (en) 1981-07-31

Family

ID=15909333

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17067779A Pending JPS5694969A (en) 1979-12-27 1979-12-27 Power unit

Country Status (1)

Country Link
JP (1) JPS5694969A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4573113A (en) * 1984-01-26 1986-02-25 Borg-Warner Corporation Surge protection system for a d-c power supply during power-up
US4719553A (en) * 1987-05-07 1988-01-12 Unisys Corporation Inrush-current limiter for switching regulator power supply

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4993828A (en) * 1973-01-10 1974-09-06

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4993828A (en) * 1973-01-10 1974-09-06

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4573113A (en) * 1984-01-26 1986-02-25 Borg-Warner Corporation Surge protection system for a d-c power supply during power-up
US4719553A (en) * 1987-05-07 1988-01-12 Unisys Corporation Inrush-current limiter for switching regulator power supply

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