A direct torque controlled brushless doubly-fed reluctance machine drive system

The paper proposes a viable direct torque control (DTC) scheme for limited speed range applications of the brushless doubly fed reluctance machine (BDFRM). The simulation and experimental results generated for a small prototype show that the machine can successfully operate down to zero supply frequency of the inverter-fed (secondary) winding, unlike cage induction or many other traditional AC machines with DTC.