Switching loss reduction by a novel vector clamping classification technique for three-phase PFC converters

Performance criteria of three-phase power factor correction (PFC) converters improve significantly. with increasing switching frequency, and highly depend on the control strategy used. This paper introduces a novel sensor less 60/spl deg/-clamping vector classification PWM technique for three-phase PFC converters. The proposed scheme needs no current sensor and extra calculation for identification the highest current carrying phase that must not be switched. In addition, the classification algorithm offers exact positioning of the switching instants with less computational efforts. Moreover its implementation is simpler and needs less hardware and software, when compared with conventional SVM algorithms. In addition, to reduce the switching and conduction losses a novel switching pattern is presented in this paper. Simulation results provided, confirm the validity of the analytical work.