| 摘要 |
PROBLEM TO BE SOLVED: To provide a diagnostic system which determines the normality/abnormality of a filter reactor.SOLUTION: The diagnostic system comprises a first voltage detector 21 that detects a voltage between wiring 2 and a track 10, a second voltage detector 23 that detects a voltage across both ends of a filter capacitor 7, a current detector 22 that detects a current of a filter reactor 5, and a controller 20 that receives the input of a voltage detection value by the first, second voltage detectors 21, 23 and a current detection value by the current detector 22. Before operating a power converter 8, the controller 20 uses the voltage detection value during a predetermined period when a rush current flows in after the initial charge completion of the filter capacitor 7 and a rate of change of the voltage detection value to calculate an inductance value of the filter reactor 5, thereby determining the normality/abnormality of the filter reactor 5. |
