CONVERTER ARRANGEMENT WITH NEUTRAL POINT CLAMPED CHOPPERS

A converter arrangement (30) comprises a first chopper circuit (40a) for connecting a positive input (32a) or a neutral point (50) with a positive output (34a), wherein the first chopper circuit (40a) comprises a first switch arrangement (42a), a first inductor (44a) and a first capacity (46a), wherein the first switch arrangement (42a) is adapted for connecting the first inductor (44a) with the positive input (32a) or with the neutral point (50), the first inductor (44a) interconnects the first switch arrangement (42a) with the positive output (34a) and the first capacity (46a) interconnects the positive output (34a) with the neutral point (50). The converter arrangement (30) further comprises a second chopper circuit (40b) for connecting a negative input (32b) or the neutral point (50) with a negative output (34b), wherein the second chopper circuit (40b) comprises a second switch arrangement (42b), a second inductor (44b) and a second capacity (46b), wherein the second switch arrangement (42b) is adapted for connecting the second inductor (44b) with the negative input (32b) or with the neutral point (50), the second inductor (44b) interconnects the second switch arrangement (42b) with the negative output (34b) and the second capacity (46b) interconnects the negative output (34b) with the neutral point (50). The converter arrangement (30) further comprises an overvoltage protection device (52) adapted for short- circuiting the positive output (34a) and the negative output (34b), when an overvoltage is measured between the positive output (34a) and/or the negative output (34b) and the neutral point (50, 54). La présente invention concerne un agencement de convertisseur (30) qui comprend un premier circuit hacheur (40a) pour connecter une entrée positive (32a) ou un point neutre (50) avec une sortie positive (34a), le premier circuit hacheur (40a) comprenant un premier agencement de commutation (42a), une première bobine d'induction (44a) et une première capacité (46a), le premier agencement de commutation (42a) étant adapté pour connecter la première bobine d'induction (44a) à l'entrée positive (32a) ou au point neutre (50), la première bobine d'induction (44a) interconnecte le premier agencement de commutation (42a) avec la sortie positive (34a) et la première capacité (46a) interconnecte la sortie positive (34a) avec le point neutre (50). L'agencement de convertisseur (30) comprend en outre un second circuit hacheur (40b) pour connecter une entrée négat