Multilevel Neutral Point Clamping Double Converter For Pm Synchronous Motors Drive

Résumé: Abstract- The aim of this paper is to give a solution to unbalance problem of the input DC voltages of nine-level NPC-VSI used in high voltage and great power applications [1]. For that, one two-level PWM current rectifier-nine-level NPC VSI-PMSM cascade is presented. In the first part, we develop a knowledge model of nine-level NPC VSI and propose a space vector modulation of this converter . In the first case the input DC voltages of the multilevel inverter are supposed constant and equals. After that, we propose to study a new high voltage cascade two-level PWM current rectifier-nine-level NPC VSI-PMSM. This study shows particularly the problem of the stability of the DC voltages of the inverterl. Then, we propose a solution to the problem by employed closed loop regulation using classic PI regulator mode. We add a Clamping bridge to stabilise the eight DC input voltages of nine-level NPC VSI.

Publié dans la revue: Communication science et technologie