Patent ID: 11967818
Assignee: AMAZON TECHNOLOGIES, INC.
Field: Transport (Mechanical engineering)
Classification: CPC B  H | IPC B  H

Claim 12:
13. A protection mechanism for a motor drive and control system, comprising:
a first ground fault protection mechanism configured to trigger a first ground fault condition based at least in part on a direct current (DC) positive current and a DC negative current;
a second ground fault protection mechanism configured to trigger a second ground fault condition based at least in part on the DC positive current and currents associated with each phase of a three-phase signal;
a DC open protection mechanism configured to trigger a DC open fault condition based at least in part on a DC bus voltage and at least one of the DC positive current or the DC negative current; and
a DC overcurrent protection mechanism configured to trigger a DC overcurrent fault condition based at least in part on the DC positive current.