| 摘要 |
PROBLEM TO BE SOLVED: To provide a film capacitor deterioration diagnosing device for measuring the electrical characteristics and surface temperature of a film capacitor, and diagnosing deterioration of the film capacitor from the measurement data. SOLUTION: This film capacitor deterioration diagnosing device is equipped with a first measuring means for measuring the electrical characteristic values of the capacitor, a second measuring means for measuring surface temperature of the capacitor, a storage means for storing a database with data on the characteristic values measured by these measuring means, and a database previously stored with a referential characteristic curve and deterioration judgement values for film capacitors. The data on the characteristic values measured by the measuring means is compared with the characteristic curve and the judgement values in the database, thereby performing diagnosis on deterioration judgement and useful life prediction of the capacitor. The progressing state of deterioration of the capacitor can be easily understood. COPYRIGHT: (C)2004,JPO
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