Survivability-Based Protection for Electric Motor Drive Systems-Part I: $3\phi$ Induction Motor Drives

This article develops a survivability-based protection for three-phase induction motor drive (
$3\phi$
IMDs) systems against severe dynamic events. The developed protection is based on defining a survivability index
$\Gamma _{\text{IMD}}$
, which is formulated in terms of the change in power created by a dynamic event experienced by a
$3\phi$
IMD. The determination of
$\Gamma _{\text{IMD}}$
provides an accurate tool to detect, identify, and respond to unsurvivable dynamic events. The efficacy and validity of the survivability-based protection for
$3\phi$
IMDs are verified through simulation and experimental tests. These tests are conducted for 10 hp
$3\phi$
IMD under various types of dynamic events. Test results demonstrate the effectiveness of the survivability-based protection in responding to unsurvivable dynamic events to prevent damage to different components in a
$3\phi$
IMD.