Analysis of open-phase degradation in a mono-inverter double PMSM system

This paper presents the studies of degradation mechanisms in a mono-inverter multi-machine permanent magnet synchronous (PMS) system subjected to stator phase disconnection. The system principle operation in normal condition will first be presented. The degradation scenarios and their consequences for motor phase and inverter phase disconnection modes will be analyzed in detail. Control solutions under the given degraded condition are also proposed and based on analytical method and Saber simulations. This study contributes to the availability improvement of multi-motor/mono-inverter system.