| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To allow accurate estimation of insulation lifetime even when measurement is performed under any condition. <P>SOLUTION: An initial characteristic curve F<SB>a</SB>and a limit characteristic curve F<SB>b</SB>created based on a relative relation between an insulation characteristic and humidity are inputted as reference curves of lifetime estimation (step S11). Humidity is corrected as needed (steps S12-S14) following the input of various parameters related to the motor to be estimated in insulation lifetime, then the insulation characteristic of the motor to be estimated in insulation lifetime and a present characteristic curve passing through a characteristic point with the relative humidity of the motor are calculated based on the reference curves, and the insulation lifetime of the motor is estimated based on the present characteristic curve, using years, and soilure speed (steps S12-S20). Even when the humidity condition varies, the insulation lifetime can be accurately estimated by the estimating method using the characteristic curve indicating the relative relation between the insulation characteristic and the humidity. <P>COPYRIGHT: (C)2004,JPO</p> |
