The three-phase inverter of Fig. 10.43a is used as a 3 PWM inverter. A triangular modulation of the pole voltages is implemented; that is, the modulating waves A, B, and C are triangular waves at the inverter output frequency. For a carrier ratio of three and modulation index 0.5, draw voltage waveforms for pole voltages A0, B0, and C0, and line voltages AB, BC, and CA.
FIGURE 10.43: Three-phase bridge inverter.