Semiconductor protection elements for controlling short...

Details Semiconductor protection elements for controlling short... Semiconductor protection elements for controlling short...

H - Electricity

02

M

H02M 7/49 (2007.01) H02H 7/122 (2006.01)

Patent

CA 2671819

Disclosed is a device (1) for converting an electric current, comprising at least one phase module (2a, 2b, 2c) that has an AC terminal (3) and at least one DC terminal (p, n). A phase module branch (11p, 11n), each of which is equipped with serially connected sub-modules (15), is formed between each DC terminal (p, n) and each AC terminal (3), each sub-module (15) being provided with at least one power semiconductor (12, 13). In order to create a device (1) which is able to withstand even high short-circuit currents for a sufficient period of time, semiconductor protecting means (9, 14, 20) are connected in parallel or in series to at least one of the power semiconductors (12, 13).

L'invention concerne un dispositif (1) pour transformer un courant électrique, comprenant au moins un module de phase (2a, 2b, 2c) qui présente un branchement de tension alternative (3) et au moins un branchement de tension continue (p, n), sachant qu'une branche de module de phase (11p, 11n) est formée entre chaque branchement de tension continue (p, n) et chaque branchement de tension alternative (3), et sachant que chaque branche de module de phase (11p, 11n) dispose d'un montage en série de sous-modules (15) qui présentent chacun au moins un semi-conducteur de puissance (12, 13). L'invention vise à fournir un tel dispositif (1) qui puisse résister à des courants de court-circuit même élevés pendant une durée suffisante. A cet effet, des moyens de protection semi-conducteurs (9, 14, 20) sont montés en parallèle ou en série avec au moins un des semi-conducteurs de puissance (12,13).

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