Direct Torque Control with Space Vector Modulation (DTC-SVM) of ...

Voltage source PWM inverter for PMSM supply
4
U
3 th
8
U
3 th
2
U
3 th
Figure 3.15 Voltage compensation components in stationary reference frame.
From the top reference α and β components.
In order to illustrate the effectiveness of the proposed compensation a simulation study
has been performed. Fig. 3.16a shows the phase current in α,
β frame and their
hodograph without compensation and Fig. 3.16b with proposed compensation method.
a)
a)
b)
b)
Figure 3.16 Nonlinearity effect of voltage source inverter on phase current of AC machine:
a) without compensation, b) with compensation.
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