JPS55112617A - Alternating current constant voltage unit - Google Patents

Alternating current constant voltage unit

Info

Publication number
JPS55112617A
JPS55112617A JP1893179A JP1893179A JPS55112617A JP S55112617 A JPS55112617 A JP S55112617A JP 1893179 A JP1893179 A JP 1893179A JP 1893179 A JP1893179 A JP 1893179A JP S55112617 A JPS55112617 A JP S55112617A
Authority
JP
Japan
Prior art keywords
voltage
circuit
phase
zero point
load
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
JP1893179A
Other languages
Japanese (ja)
Inventor
Hiroshi Okamoto
Mitsuo Yonemori
Toshio Hashimoto
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP1893179A priority Critical patent/JPS55112617A/en
Publication of JPS55112617A publication Critical patent/JPS55112617A/en
Pending legal-status Critical Current

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  • Control Of Electrical Variables (AREA)

Abstract

PURPOSE: To reduce the size of AC constant voltage unit and to make low the cost, by providing the trigger phase detection circuit of AC switching circuit and the voltage zero point detection circuit of AC power supply, and turning on the AC power input voltage at the triggering phase and turning off it at the zero point phase.
CONSTITUTION: The circuit 21 detecting the zero point of AC voltage with the output voltage of the full wave rectifying circuit 3 is provided, FF is set with the output of the circuit 21, and transistor Tr22 is turned on. FF is set with the trigger signal from the phase control circuit 6, and Tr22 is ON only between the voltage zero point of the AC power input 1 and the phase of the triac 2 triggered. Accordingly, the input voltage of the smoothing circuit 9 is given only when Tr22 is OFF, and AC voltage switched with the same conduction angle as the load L is applied, and the output voltage of the circuit 9 corresponds to the voltage fed to the load L. Thus, the comparison circuit 5 and phase control circuit 6 are operated to perform phase control of the triac 2 and a given voltage is fed to the load. With this constitution, any transformer is unnecessary, to achieve small size.
COPYRIGHT: (C)1980,JPO&Japio
JP1893179A 1979-02-20 1979-02-20 Alternating current constant voltage unit Pending JPS55112617A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1893179A JPS55112617A (en) 1979-02-20 1979-02-20 Alternating current constant voltage unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1893179A JPS55112617A (en) 1979-02-20 1979-02-20 Alternating current constant voltage unit

Publications (1)

Publication Number Publication Date
JPS55112617A true JPS55112617A (en) 1980-08-30

Family

ID=11985375

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1893179A Pending JPS55112617A (en) 1979-02-20 1979-02-20 Alternating current constant voltage unit

Country Status (1)

Country Link
JP (1) JPS55112617A (en)

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