High Performance Control of AC Drives with Matlab / Simulink Models

5.5 DTC of Induction Motor with Consideration of both Iron Losses and Magnetic Saturation

5.5.1 Induction Machine Model with Consideration of Iron Losses and Magnetic Saturation

Representations of iron losses and magnetic saturation in dynamic space vector equivalent circuit of induction machines in an arbitrary frame of reference rotating at angular speed are shown in Figure 5.65.

Figure 5.65 Space vector dynamic equivalent circuit of induction machine in an arbitrary reference frame [23]

Differential equations of the machine model are [23]

(5.38)

(5.39)

(5.40)

(5.41)

(5.42)

(5.43)

The equivalent iron loss resistance as a function of stator frequency is [23]

(5.44)

The equivalent magnetizing ...