JPS57190274A - Deterioration detecting circuit for smoothing circuit - Google Patents

Deterioration detecting circuit for smoothing circuit

Info

Publication number
JPS57190274A
JPS57190274A JP7531781A JP7531781A JPS57190274A JP S57190274 A JPS57190274 A JP S57190274A JP 7531781 A JP7531781 A JP 7531781A JP 7531781 A JP7531781 A JP 7531781A JP S57190274 A JPS57190274 A JP S57190274A
Authority
JP
Japan
Prior art keywords
circuit
rectification
smoothing
voltage
deterioration detecting
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
JP7531781A
Other languages
Japanese (ja)
Inventor
Norio Tajima
Shigeru Yamazaki
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 JP7531781A priority Critical patent/JPS57190274A/en
Publication of JPS57190274A publication Critical patent/JPS57190274A/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
    • G01R19/0046—Arrangements for measuring currents or voltages or for indicating presence or sign thereof characterised by a specific application or detail not covered by any other subgroup of G01R19/00
    • G01R19/0053—Noise discrimination; Analog sampling; Measuring transients

Abstract

PURPOSE:To enable direct detection of deterioration in a smoothing circuit by monitoring a ripple voltage thereof. CONSTITUTION:A.C. ripple component alone is taken into a rectification circuit 3 through a capacitor 2 from a capacitor 1 to be detected and the voltage following the rectification is compared with the output of a threshold voltage generation circuit 5 by means of a comparator circuit 4. When the voltage following the rectification exceeds the threshold, the LED of a display/alarm circuit 6 is turned on.
JP7531781A 1981-05-19 1981-05-19 Deterioration detecting circuit for smoothing circuit Pending JPS57190274A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7531781A JPS57190274A (en) 1981-05-19 1981-05-19 Deterioration detecting circuit for smoothing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7531781A JPS57190274A (en) 1981-05-19 1981-05-19 Deterioration detecting circuit for smoothing circuit

Publications (1)

Publication Number Publication Date
JPS57190274A true JPS57190274A (en) 1982-11-22

Family

ID=13572753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7531781A Pending JPS57190274A (en) 1981-05-19 1981-05-19 Deterioration detecting circuit for smoothing circuit

Country Status (1)

Country Link
JP (1) JPS57190274A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6381277A (en) * 1986-09-25 1988-04-12 Kosuke Harada Life detector for smoothing capacitor
JPS6381279A (en) * 1986-09-25 1988-04-12 Kosuke Harada Preventive maintenance system for smoothing capacitor
JPS6381278A (en) * 1986-09-25 1988-04-12 Kosuke Harada Life display device for smoothing capacitor
JPS6381276A (en) * 1986-09-25 1988-04-12 Kosuke Harada Life detecting method for smoothing capacitor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54149858A (en) * 1978-05-16 1979-11-24 Fuji Electric Co Ltd Smoothing capacitor deterioration monitor unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54149858A (en) * 1978-05-16 1979-11-24 Fuji Electric Co Ltd Smoothing capacitor deterioration monitor unit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6381277A (en) * 1986-09-25 1988-04-12 Kosuke Harada Life detector for smoothing capacitor
JPS6381279A (en) * 1986-09-25 1988-04-12 Kosuke Harada Preventive maintenance system for smoothing capacitor
JPS6381278A (en) * 1986-09-25 1988-04-12 Kosuke Harada Life display device for smoothing capacitor
JPS6381276A (en) * 1986-09-25 1988-04-12 Kosuke Harada Life detecting method for smoothing capacitor
JPH0541950B2 (en) * 1986-09-25 1993-06-25 Kosuke Harada

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