A comparison of properties of direct torque and flux control methods (DTC-SVM,DTC-δ, DTC-2x2, DTFC-3A)

In the paper comparison of two classes of direct torque and flux control methods with linear (DTC-SVM) and nonlinear (DTC-δ, DTC-2x2, DTFC-3A) controllers was carried out. Criteria of comparisons in both steady and transient states in similar conditions i.e. at the same average switching frequency, were proposed. The comparisons were made using the results of laboratory tests of control systems cooperating with drive systems.