JPS5449059A - Ac zero-volt switch circuit - Google Patents

Ac zero-volt switch circuit

Info

Publication number
JPS5449059A
JPS5449059A JP11631677A JP11631677A JPS5449059A JP S5449059 A JPS5449059 A JP S5449059A JP 11631677 A JP11631677 A JP 11631677A JP 11631677 A JP11631677 A JP 11631677A JP S5449059 A JPS5449059 A JP S5449059A
Authority
JP
Japan
Prior art keywords
circuit
load
voltage detection
detection circuit
voltage
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
JP11631677A
Other languages
Japanese (ja)
Inventor
Shinichi Iwamoto
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 JP11631677A priority Critical patent/JPS5449059A/en
Publication of JPS5449059A publication Critical patent/JPS5449059A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electronic Switches (AREA)
  • Power Conversion In General (AREA)

Abstract

PURPOSE: To turn ON the circuit accurately regardless of characteristics of a load without possiblity of a rush current even in case of using a trans load, by generating a trigger pulse by a FF interloking with a power voltage detection circuit and a circuit detecting a voltage between main electrodes of thyristors.
CONSTITUTION: A signal is applied to input A and the moment when a clock from voltage detection circuit 29 changes from high to low, the Q output of FF28 causes AND gate 26 to open and trigger pulse generating circuit 27 turns ON thyristor 2. At this time, since gate 26 is opening because of an inductive load, etc., even if the thyristor is turned ON, generating circuit 27 of voltage detection circuit 25 is driven to turn ON element 2 accurately. While no signal is applied to input A, the output Q of FF28 becomes low owing to the rise of circuit 29, and supplying a voltage to the load starts with a constant polarity and ends with the opposite polarity, so that the saturation will be hard to occur even in case of a trans load and no rush current will flow
COPYRIGHT: (C)1979,JPO&Japio
JP11631677A 1977-09-27 1977-09-27 Ac zero-volt switch circuit Pending JPS5449059A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11631677A JPS5449059A (en) 1977-09-27 1977-09-27 Ac zero-volt switch circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11631677A JPS5449059A (en) 1977-09-27 1977-09-27 Ac zero-volt switch circuit

Publications (1)

Publication Number Publication Date
JPS5449059A true JPS5449059A (en) 1979-04-18

Family

ID=14683966

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11631677A Pending JPS5449059A (en) 1977-09-27 1977-09-27 Ac zero-volt switch circuit

Country Status (1)

Country Link
JP (1) JPS5449059A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57181142U (en) * 1981-05-11 1982-11-17
JPS59223A (en) * 1982-06-25 1984-01-05 Chino Works Ltd Zero crossing controlling circuit
JPS5969699U (en) * 1982-10-30 1984-05-11 萩原　俊男 AC motor rotation speed control device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57181142U (en) * 1981-05-11 1982-11-17
JPS59223A (en) * 1982-06-25 1984-01-05 Chino Works Ltd Zero crossing controlling circuit
JPS5969699U (en) * 1982-10-30 1984-05-11 萩原　俊男 AC motor rotation speed control device

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