초록 ▼

In the event of a fault in one of the drive units, fault isolation may be accomplished by individually turning off each motor drive in sequence via the associated contactor to determine the faulty drive unit. Alternatively, all of the motor drive units may be turned off and then individually turned

In the event of a fault in one of the drive units, fault isolation may be accomplished by individually turning off each motor drive in sequence via the associated contactor to determine the faulty drive unit. Alternatively, all of the motor drive units may be turned off and then individually turned back on until the fault reappears. Once the fault reappears, the faulty unit is identified and disabled and the remaining units are turned back on.

대표청구항 ▼

[What is claimed is:] [1.]detecting a fault while the first and second integrated motor drives are supplied with direct current from a direct current bus;decreasing the direct current voltage on the direct current bus in response to the fault detection;disconnecting the direct current supplied to th

[What is claimed is:] [1.]detecting a fault while the first and second integrated motor drives are supplied with direct current from a direct current bus;decreasing the direct current voltage on the direct current bus in response to the fault detection;disconnecting the direct current supplied to the first integrated motor drive;determining if the fault is still detected; andconnecting the direct current to the first integrated motor drive and disconnecting the direct current supplied to the second integrated motor drive if the fault is still detected.