Comparative study of two linearization methods for time intervals generation of SVPWM technique

摘要

According to the large number of variable voltage/variable frequency drive (VVVFD) systems, a continuous effort for developing new switching techniques to minimize the harmonics level and improve the power quality in such systems. The Space Vector Pulse Width Modulation SVPWM techniques, which are based on trigonometric functions, have dense calculations that require considerable processing time in system implementation. In this paper a comparative study for two linearization methods are carried out for generating the time intervals of SVPWM technique. The proposed linearization methods achieve a minimum computational time rather than the trigonometric sine function which is considered the base for the time interval calculations of the SVPWM technique. The first linearization method is based on the first order equation, and the second method is the (Takagi–Sugeno) fuzzy modeling system. The comparative study includes the accuracy of the two models, also a simulation model is carried out for current THD estimation using the two proposed methods compared with the current THD generated by SVPWM based on the trigonometric sine function.