DB-DTFC as loss minimizing control for synchronous reluctance drives

This paper applies deadbeat-direct torque and flux control (DB-DTFC) to minimize machine and inverter losses in synchronous reluctance drives each single switching period. Flux linkage-based loss models for machine and inverter considering nonlinear effects such as cross-saturation and temperature changes are experimentally evaluated. Loss minimizing capabilities are demonstrated comparing three different control strategies. It is shown experimentally that incorporating inverter losses into the control algorithm and minimizing losses of machine and inverter instead of only considering machine losses leads to a reduction of total losses.