JPS5773678A - Detector for momentary power failure - Google Patents

Detector for momentary power failure

Info

Publication number
JPS5773678A
JPS5773678A JP14970480A JP14970480A JPS5773678A JP S5773678 A JPS5773678 A JP S5773678A JP 14970480 A JP14970480 A JP 14970480A JP 14970480 A JP14970480 A JP 14970480A JP S5773678 A JPS5773678 A JP S5773678A
Authority
JP
Japan
Prior art keywords
power failure
momentary power
output
timer
pulse
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
JP14970480A
Other languages
Japanese (ja)
Inventor
Toshio Yoshida
Wataru Takahashi
Hiroyuki Nonaka
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP14970480A priority Critical patent/JPS5773678A/en
Publication of JPS5773678A publication Critical patent/JPS5773678A/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
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • G01R19/16547—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies voltage or current in AC supplies

Landscapes

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

Abstract

PURPOSE:To detect a momentary power failure securely by counting the output state of a pulse generation part, which generates a pulse signal synchronizing with a commercial power source, by a timer part and by comparing the count value with the set value of a storage part. CONSTITUTION:A pulse generation part 1 generates a pulse which goes up to a high level approximately at a zero phase point of a commercial power source, and a timer part 2 clocks the time when the pulse output is held high, and is reset when the output is at a low level. The clocking output of the timer part 2 is inputted to a comparison part 3 to be compared with the output value of a storage part 4. If a momentary power failure occurs, a counter in the timer part 2 continues to count without being reset during the period of the momentary power failure. Consequently, the comparison part 3 is informed that the timer part 2 counts up to a prescribed value or more, and the comparison part 3 outputs a detection signal for the power failure. Thus, the control circuit of a microcomputer continues operation without stopping the operation regardless of the momentary power failure.
JP14970480A 1980-10-24 1980-10-24 Detector for momentary power failure Pending JPS5773678A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14970480A JPS5773678A (en) 1980-10-24 1980-10-24 Detector for momentary power failure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14970480A JPS5773678A (en) 1980-10-24 1980-10-24 Detector for momentary power failure

Publications (1)

Publication Number Publication Date
JPS5773678A true JPS5773678A (en) 1982-05-08

Family

ID=15480983

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14970480A Pending JPS5773678A (en) 1980-10-24 1980-10-24 Detector for momentary power failure

Country Status (1)

Country Link
JP (1) JPS5773678A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5953632U (en) * 1982-09-30 1984-04-09 株式会社明電舎 DC power supply circuit power failure detection device
JPS59231455A (en) * 1983-06-15 1984-12-26 Fuji Electric Co Ltd Ac signal existence judging apparatus
JPH0211197A (en) * 1988-06-28 1990-01-16 Toshiba Corp Operation controller for washing machine
WO2019188064A1 (en) * 2018-03-30 2019-10-03 ダイキン工業株式会社 Voltage detection circuit, voltage monitor circuit, refrigeration device, and refrigeration device for container

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5953632U (en) * 1982-09-30 1984-04-09 株式会社明電舎 DC power supply circuit power failure detection device
JPS59231455A (en) * 1983-06-15 1984-12-26 Fuji Electric Co Ltd Ac signal existence judging apparatus
JPH0211197A (en) * 1988-06-28 1990-01-16 Toshiba Corp Operation controller for washing machine
JPH07102275B2 (en) * 1988-06-28 1995-11-08 株式会社東芝 Washing machine operation control device
WO2019188064A1 (en) * 2018-03-30 2019-10-03 ダイキン工業株式会社 Voltage detection circuit, voltage monitor circuit, refrigeration device, and refrigeration device for container

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