JPS5773678A - Detector for momentary power failure - Google Patents
Detector for momentary power failureInfo
- Publication number
- JPS5773678A JPS5773678A JP55149704A JP14970480A JPS5773678A JP S5773678 A JPS5773678 A JP S5773678A JP 55149704 A JP55149704 A JP 55149704A 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
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55149704A JPS5773678A (en) | 1980-10-24 | 1980-10-24 | Detector for momentary power failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55149704A 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 |
|---|---|---|---|
| JP55149704A 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)
| 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 |
-
1980
- 1980-10-24 JP JP55149704A patent/JPS5773678A/en active Pending
Cited By (5)
| 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 |
| JP2019184582A (en) * | 2018-03-30 | 2019-10-24 | ダイキン工業株式会社 | Voltage detection circuit, voltage monitoring circuit, cooling device, and container cooling device |
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