JPS5679315A - Constant-voltage power unit - Google Patents

Constant-voltage power unit

Info

Publication number
JPS5679315A
JPS5679315A JP15631879A JP15631879A JPS5679315A JP S5679315 A JPS5679315 A JP S5679315A JP 15631879 A JP15631879 A JP 15631879A JP 15631879 A JP15631879 A JP 15631879A JP S5679315 A JPS5679315 A JP S5679315A
Authority
JP
Japan
Prior art keywords
voltage
drops below
thyristor
charged
zener
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
JP15631879A
Other languages
Japanese (ja)
Inventor
Katsuhide Tanoshima
Noburo Fukaya
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP15631879A priority Critical patent/JPS5679315A/en
Publication of JPS5679315A publication Critical patent/JPS5679315A/en
Pending legal-status Critical Current

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  • Control Of Electrical Variables (AREA)

Abstract

PURPOSE: To decrease a voltage fluctuation rate sufficiently with simple circuit constitution, by limiting a rise in output voltage by turning off a thyristor unit the charge voltge across a smoothing capacitor connected between both output terminals drops below a reference voltage.
CONSTITUTION: An AC input voltage, applied between input terminals 1a and 1b, is full-wave-rectified by full-wave rectifying circuit 2, which outputs pulsating voltage VA. Since the charged voltage across smoothing capacitor 3 is lower than Zener voltage VZ across Zener diode ZD in the beginning, transistor TR2 is on and voltage VA is applied to the gate of thyristor 1, which turns on. Next, as voltage VA drops below charged voltage E0 across capacitor 3, thyristor 1 turns off. Then, a rise in output voltage is limited until the charged voltage across capacitor 3 drops below Zener voltage VZ. Thus, a voltage fluctuation rate can be decreased sufficiently by the simple circuit constitution.
COPYRIGHT: (C)1981,JPO&Japio
JP15631879A 1979-12-04 1979-12-04 Constant-voltage power unit Pending JPS5679315A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15631879A JPS5679315A (en) 1979-12-04 1979-12-04 Constant-voltage power unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15631879A JPS5679315A (en) 1979-12-04 1979-12-04 Constant-voltage power unit

Publications (1)

Publication Number Publication Date
JPS5679315A true JPS5679315A (en) 1981-06-29

Family

ID=15625171

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15631879A Pending JPS5679315A (en) 1979-12-04 1979-12-04 Constant-voltage power unit

Country Status (1)

Country Link
JP (1) JPS5679315A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60170819U (en) * 1984-04-16 1985-11-12 和泉電気株式会社 High voltage constant voltage power supply circuit
JPS60170820U (en) * 1984-04-16 1985-11-12 和泉電気株式会社 High voltage power supply circuit
US4675798A (en) * 1985-07-15 1987-06-23 Harris Corporation Direct coupled switching power supply with GTO SCR switching element
US4754387A (en) * 1987-01-27 1988-06-28 Zenith Electronics Corporation Start-up circuit for a switch mode power supply
WO2011121617A3 (en) * 2010-05-05 2012-12-06 India Nippon Electricals Limited Voltage control system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5145622U (en) * 1974-10-02 1976-04-03

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5145622U (en) * 1974-10-02 1976-04-03

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60170819U (en) * 1984-04-16 1985-11-12 和泉電気株式会社 High voltage constant voltage power supply circuit
JPS60170820U (en) * 1984-04-16 1985-11-12 和泉電気株式会社 High voltage power supply circuit
US4675798A (en) * 1985-07-15 1987-06-23 Harris Corporation Direct coupled switching power supply with GTO SCR switching element
US4754387A (en) * 1987-01-27 1988-06-28 Zenith Electronics Corporation Start-up circuit for a switch mode power supply
WO2011121617A3 (en) * 2010-05-05 2012-12-06 India Nippon Electricals Limited Voltage control system

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