High performance constant switching frequency hysteresis-based direct torque control technique

Classical Direct Torque Control (DTC) exhibits high dynamic response due to inherent hysteresis controllers, but suffers from the issue of variable switching frequency. This paper proposes a DTC technique that is not only able to retain the dynamic response of classical DTC, but also achieves both constant switching frequency as well as lesser torque and flux ripples compared to classical DTC. Comparison of classical and proposed DTC technique is presented by simulation and experimental results.