A voltage source converter

H - Electricity – 02 – M

Patent

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Details

H02M 7/483 (2007.01)

Patent

CA 2718937

A Voltage Source Converter having at least one phase leg connected to opposite poles of a direct voltage side of the converter and comprising a series connection of switching cells (7) has an arrangement (25) configured to apply a pressure to opposite ends of stacks of semiconductor assemblies for pressing the assemblies towards each other so as to obtain electric contact between semiconductor assemblies in said stack while ensuring that the semiconductor assemblies of a first path (23) of each switching cellof the converter go into a permanently closed circuit state in case of a failure of the respective switching cell. A second path (27) of each switching cell has means (29) configured to keep said second path including an energy storing capacitor (20) non-conducting upon occurrence of a said failure.

L'invention concerne un convertisseur de source de tension possédant au moins une branche de phase connectée aux pôles opposés du côté tension continue du convertisseur et comportant des cellules de commutation (7) connectées en série, convertisseur possédant une disposition (25) configurée pour appliquer une pression aux extrémités opposées d'empilements d'ensembles de semi-conducteurs, pour assurer une compression de ces derniers afin d'obtenir un contact électrique des ensembles de semi-conducteurs dans ledit empilement, tout en faisant en sorte que les ensembles de semi-conducteurs d'un premier trajet (23) de chaque cellule de commutation du convertisseur bascule dans un état de circuit fermé permanent en cas de défaillance de l'une des cellules de commutation respectives. Un second trajet (27) de chaque cellule de commutation possède un moyen (29), notamment un condensateur de stockage d'énergie (20), configuré pour maintenir non conducteur ledit second trajet après apparition de ladite défaillance.

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