6.5.5. Application of Sinusoidal Pulse Width Modulation Control Technique to Multilevel Inverters
The SPWM control technique, which was used for the two-level inverter, can also be used in multilevel inverters for output voltage control and reduction of the output voltage harmonic content. The basic principles of the SPWM control are the same with the only difference that, instead of using one carrier signal, a number of carriers are used, depending on the number of levels to be generated. Since multiple carrier signals are used, this control technique is called multicarrier sinusoidal pulse width modulation (MCSPWM). All carrier signals have the same amplitude and frequency. To generate the gating signal of one main semiconductor switch, a reference ...
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