| 摘要 |
PROBLEM TO BE SOLVED: To stop the operation of an inverter which is operated in linkage with a system by overcurrent of the inverter and restart the inverter by restoring the system to a normal condition in the case that the overcurrent was caused by an instantaneous abnormality of the system. SOLUTION: This method includes steps 101, 102 which detect overcurrent in an inverter and then stops the operation of the inverter, a system abnormality detecting step 103 which instantly detects an abnormality which caused the overcurrent of the inverter, and steps 106, 107 which instantly detects the restoration of the system to a normal condition after the abnormality in the system is detected and then restart the inverter which has been stopped due to overcurrent. Even if the inverter stops due to overcurrent, it can be restarted in one or two cycles if the cause of the overcurrent is an instantaneous abnormality in the system. |
