Abstract
Third harmonic injection pulse width modulation (PWM) is a well known inverter control method improving the harmonics quality. Nevertheless this field of research is not closed and recent researches showed that a wide spread of third harmonics injection inside the zero sequence component of a synchronous carrier based PWM improves the voltage harmonics at the output of a three phases two-level inverter.Furthermore, for some specific parameters, this new zero sequence component modulation (ZSCM) seems to converge to a saw-tooth shape. The presented research is the direct continuity of the previous paper on ZSCM [Bourgeade et al. (2021a)].The following work is attached to show a description and advantages of the saw-tooth injection PWM (STIPWM). As STIPWM is very singular in the literature, a mathematical understanding is judged necessary in order to find new PWM properties to stimulate power electronics control research.Then, this paper present to the community the STIPWM problem and an incomplete demonstration which leads to establish a conjecture, following a stimulating explanation will be found.
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