Patent ID: 6879503
Filing Date: 2005-04-12
Classification: H02M

Abstract:
1. Cutting device for reversibly converting electrical power between an alternating voltage source and an alternating current source, comprising an even number of switching cells each having a first and a second switch which are unidirectional in voltage and bidirectional in current, capacitors associated with the switching cells and suitable for maintaining at the terminals of the cells a voltage having a charge which is zero or equal to a predetermined fraction of the voltage of the voltage source, and control devices each connected to a switching cell and suitable for controlling the switching of the first and second switches of the cell, a first half of the cells being suitable for processing the positive alternation of the voltage of the voltage source and the second half of the cells being suitable for processing the negative alternation of the voltage of the voltage source, wherein a first group of switches is formed by the first switches of the switching cells, which first switches are connected in series between a first terminal of the voltage source and a first terminal of the current source, in that a second group of switches is formed by the second switches of the switching cells, which second switches are connected in series between a second terminal of the voltage source and the first terminal of the current source, the unidirectional characteristics in voltage of the first and second switches belonging to the first half of the cells being respectively opposed to those of the first and second switches belonging to the second half of the cells.