Space Vector Modulation For THREE-LEG Voltage

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The topology of a three-leg voltage source inverter is shown in Fig. 2.1. Because of the constraint that the input lines must never be shorted and the output current must always be continuous a voltage source inverter can assume only eight distinct topologies. These topologies are shown on Fig. 2.2. Six out of these eight topologies produce a nonzero output voltage and are known as non-zero switching states and the remaining two topologies produce zero output voltage and are known as zero switching states.

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