Method of measuring insulation resistance of capacitor and apparatus for screening characteristics
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United States of America Patent
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Feb 6, 2001
Grant Date -
N/A
app pub date -
May 4, 1998
filing date -
May 9, 1997
priority date (Note) -
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Abstract
The insulation resistance of a capacitor is accurately measured within a short period of time by applying AC signals at two different frequencies f.sub.1 and f.sub.2 to the capacitor to measure the impedance Z.sub.1 and Z.sub.2 of the capacitor at each frequency. The series resistance Rs and capacity C of the capacitor are obtained from the impedance Z.sub.1 at the higher frequency f.sub.1, and the insulation resistance Rp of the capacitor is obtained from the impedance Z.sub.2, series resistance Rs and capacity C at the lower frequency f.sub.2.
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