FORCE COMMUTATED 3-LEVEL BOOST TYPE RECTIFIER

A new force commutated three level boost type rectifier is proposed in this paper. The rectifier has the characteristics of drawing nearly s inusoidal current from utility with unity fundamental power factor. Hi gh reliability is possible due to its shoot-through free structure. A doubled dc bus voltage compared to a normal two-level rectifier is als o possible because of the neutral point clamping. The operating princi ple, steady state analysis, input current and neutral point voltage co ntrol schemes, as well as detailed experimental results are presented in this paper.