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Cutting electric power converter

  • US 20040037101A1
  • Filed: 08/11/2003
  • Published: 02/26/2004
  • Est. Priority Date: 09/12/2000
  • Status: Active Grant
First Claim
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1. Cutting device for reversibly converting electrical power between an alternating voltage source (2) and an alternating current source (4), comprising an even number of switching cells (61, . . . , 62n) each having a first (81, . . . , 82n) and a second (101, . . . , 102n) switch which are unidirectional in voltage and bidirectional in current, capacitors (241, . . . , 242n−

  • 1) associated with the switching cells (61, . . . , 62n) 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 (Ve) of the voltage source (2), and control devices (261, . . . , 262n) each connected to a switching cell and suitable for controlling the switching of the first and second switches (81, . . . , 82n, 101, . . . 102n) of the cell, a first half (61, . . . , 62i−

    1
    , . . . , 62n−

    1
    ) of the cells being suitable for processing the positive alternation of the voltage (Ve) of the voltage source (2) and the second half (62, . . . , 62i, . . . , 62n) of the cells being suitable for processing the negative alternation of the voltage (Ve) of the voltage source (2), characterised in that a first group of switches is formed by the first switches (81, . . . , 82n) of the switching cells, which first switches are connected in series between a first terminal (14) of the voltage source (2) and a first terminal (12) of the current source (4), in that a second group of switches is formed by the second switches (101, . . . , 102n) of the switching cells, which second switches are connected in series between a second terminal (16) of the voltage source (2) and the first terminal (12) of the current source (4), the unidirectional characteristics in voltage of the first and second switches (81, . . . , 82i−

    1
    , . . . , 82n−

    1
    , 101, . . . , 102i−

    1
    , . . . , 102n−

    1
    ) belonging to the first half of the cells being respectively opposed to those of the first and second switches (82, . . . , 82i, . . . , 82n, 102, . . . , 102i, . . . , 102n) belonging to the second half of the cells.

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