New simplification of SV-PWM based on conditional rotation of the reference vector

This paper presents a new simplification of Space Vector Pulse Width Modulation (SV-PWM) for two-level three-phase inverters. The look-up tables with formulas about switching times and states were replaced by simple arithmetic and boolean equations. The explicit identification of the sector where the reference space vector is located was also eliminated. This paper proposes the rotation of reference space vector in 180° if its imaginary component is negative. This new procedure reduces the number of sectors to analize. Simulation and experimental results demonstrate that the proposed simplification of SV-PWM can achieve the desired voltages and has less computational cost than conventional SVPWM.