Systems and methods involving motor drive ground fault interrupts

摘要

A method comprises determining (502) whether a ground fault on a bus (110) operative to drive the system (100) exceeds a first threshold level, receiving values of phase currents of a first motor, calculating (504) a sum of the values of the phase currents of the first motor (106) responsive to determining that the ground fault on the bus exceeds the first threshold value, and determining (506) whether the sum of the values of the phase currents of the first motor (106) exceeds a second threshold value.