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Predictive Control of Power Converters and Electrical Drives by Patricio Cortes, Jose Rodriguez

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4.4 Converter Model

The power circuit of the three-phase inverter converts electrical power from DC to AC form using the electrical scheme shown in Figure 4.2. Considering that the two switches in each inverter phase operate in a complementary mode in order to avoid short-circuiting the DC source, the switching state of the power switches Sx, with x = 1, … , 6, can be represented by the switching signals Sa, Sb, and Sc defined as follows:

4.2 4.2

4.3 4.3

4.4 4.4

Figure 4.2 Voltage source inverter power circuit

4.2

These switching signals define the value of the output voltages

4.5 4.5

4.6 4.6

4.7 4.7

where Vdc is the DC source voltage.

Considering the unitary vector images/c04_I0012.gif, which represents the 120° phase displacement ...

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