Sinusoidal Pulse Width Modulation

In sinusoidal PWM, also called sine-PWM , the resulting pulse widths are varied throughout the half cycle in such a way that they are proportional to the instantaneous value of the reference sine wave at the centre of the pulses. The distance between the centres of the pulses is kept constant as in multi-PWM. Voltage control is achieved by varying the widths of all pulses without disturbing the sinusoidal relationship. The generation of the gating signals for sinusoidal PWM and the output voltage and currents is shown in Figure 6.

Figure 6: Gating Signal in Sinusoidal PWM