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Pulsewidth Modulation of Voltage Source Inverters
2.1 Fundamentals of Voltage Source Inverters
The three-phase voltage source pulsewidth modulation (PWM) converter, also called voltage source inverter (VSI), can perform the connection between the DC side and the AC side of a source/load coupling: if the energy flows from the DC side to AC side, the converter behaves like an inverter; otherwise, it behaves like a rectifier (see Figure 2.1).
The circuit is based on the so-called switch mode operation of semiconductor devices. They are suitably driven to be either in the ON or in the OFF state. In the ON state, each device, in the ideal case, has a null voltage, and its current depends on the external circuit; in the OFF state, the current ...
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