JPS57561A - Life detector for capacitor - Google Patents
Life detector for capacitorInfo
- Publication number
- JPS57561A JPS57561A JP7450980A JP7450980A JPS57561A JP S57561 A JPS57561 A JP S57561A JP 7450980 A JP7450980 A JP 7450980A JP 7450980 A JP7450980 A JP 7450980A JP S57561 A JPS57561 A JP S57561A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- capacity
- voltage
- life
- indicates
- 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
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/64—Testing of capacitors
Abstract
PURPOSE:To detect the life of a capacitor before toxic gas evolves by measuring the capacity of the capacitor and comparing the same with a capacity at the life. CONSTITUTION:Before a capacitor reaches a life, its capacity increases by about 7-8%. An integral network 10 integrates the current flowing in a capacitor 3 and obtains integrated voltage F. When the voltage F and reference voltage V1 coincide, a control signal is supplied to a sample to a holding circuit 12, by which an output H is obtained. The circuit 12 is held applied with C and D which are the voltages before and after closing of a switch 2. The output H indicates the voltage at the time of constant charge and when this voltage is a certain constant value V2 or less, it indicates that the capacity is larger than a reference capacity from the basic equation of C=Q/V. Hence, H is compared with a reference value V2 by an operational amplifier 13, and when it is V2 or less, current flows to a light emitting diode 14, by which light emission displaying is accomplished and the life of the capacitor is detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7450980A JPS57561A (en) | 1980-06-03 | 1980-06-03 | Life detector for capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7450980A JPS57561A (en) | 1980-06-03 | 1980-06-03 | Life detector for capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57561A true JPS57561A (en) | 1982-01-05 |
Family
ID=13549357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7450980A Pending JPS57561A (en) | 1980-06-03 | 1980-06-03 | Life detector for capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57561A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1160952A3 (en) * | 2000-05-29 | 2004-05-26 | Omron Corporation | Power supply module and power supply unit using the same |
| EP1814214A1 (en) * | 2004-10-26 | 2007-08-01 | Matsushita Electric Works, Ltd. | Discharge lamp lighting device, and lighting equipment and lighting system using the device |
-
1980
- 1980-06-03 JP JP7450980A patent/JPS57561A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1160952A3 (en) * | 2000-05-29 | 2004-05-26 | Omron Corporation | Power supply module and power supply unit using the same |
| EP1814214A1 (en) * | 2004-10-26 | 2007-08-01 | Matsushita Electric Works, Ltd. | Discharge lamp lighting device, and lighting equipment and lighting system using the device |
| EP1814214A4 (en) * | 2004-10-26 | 2009-10-28 | Panasonic Elec Works Co Ltd | Discharge lamp lighting device, and lighting equipment and lighting system using the device |
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