JPS5728265A - Current detecting circuit employing silicon bidirectional switching element - Google Patents

Current detecting circuit employing silicon bidirectional switching element

Info

Publication number
JPS5728265A
JPS5728265A JP10305280A JP10305280A JPS5728265A JP S5728265 A JPS5728265 A JP S5728265A JP 10305280 A JP10305280 A JP 10305280A JP 10305280 A JP10305280 A JP 10305280A JP S5728265 A JPS5728265 A JP S5728265A
Authority
JP
Japan
Prior art keywords
current
bdt21
switching element
bidirectional switching
detecting circuit
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
JP10305280A
Other languages
Japanese (ja)
Inventor
Katsuo Kobari
Yoshiaki Hachisuga
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.)
Fanuc Corp
Original Assignee
Fanuc Corp
Fujitsu Fanuc 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 Fanuc Corp, Fujitsu Fanuc Ltd filed Critical Fanuc Corp
Priority to JP10305280A priority Critical patent/JPS5728265A/en
Publication of JPS5728265A publication Critical patent/JPS5728265A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/04—Measuring peak values or amplitude or envelope of ac or of pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE:To accomplish a quick and accurate detectin of current peak value while minimizing effect due to temperature changes and secular changes in the circuit elements. CONSTITUTION:When current to be measured is limited, the voltage across a resistance 11 is so low that a silicon bidirectional switching element (BDT) 21 is off and it is applied between terminals of the BDT21. As the voltage applied to the BDT21 exceeds a switching voltage with the increase in the current being, the BDT21 conducts causing the current to pass mostly through a variable resistor 12, a resitance 13 the BDT21 and a rectifier bridge 16. And the output of the bridge 16 operates a photocoupler 17 regardless of the polarity of the current to be measured. This enables on/off operation of the BDT with a limited variation in charcteristics thereby reducing effect due to temperature changes and secular changes thereof.
JP10305280A 1980-07-29 1980-07-29 Current detecting circuit employing silicon bidirectional switching element Pending JPS5728265A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10305280A JPS5728265A (en) 1980-07-29 1980-07-29 Current detecting circuit employing silicon bidirectional switching element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10305280A JPS5728265A (en) 1980-07-29 1980-07-29 Current detecting circuit employing silicon bidirectional switching element

Publications (1)

Publication Number Publication Date
JPS5728265A true JPS5728265A (en) 1982-02-15

Family

ID=14343892

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10305280A Pending JPS5728265A (en) 1980-07-29 1980-07-29 Current detecting circuit employing silicon bidirectional switching element

Country Status (1)

Country Link
JP (1) JPS5728265A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62193572U (en) * 1986-05-30 1987-12-09
JPH03195462A (en) * 1989-12-22 1991-08-27 Adogaa Kogyo Kk Food and drink capable of color change and additive therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62193572U (en) * 1986-05-30 1987-12-09
JPH03195462A (en) * 1989-12-22 1991-08-27 Adogaa Kogyo Kk Food and drink capable of color change and additive therefor

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