Alstom Technology Limited

General Electric Technology Gmbh

Thierry Lecomte

Joerg Oesterheld

René Wilhelm Schaefer

Alain Lacaze

Massimiliano Visintin

Rene Wilhelm Schaefer

The converter includes a plurality of input lines and one or more output lines. Each input line is connected to a group of supply circuits and the supply circuits of each group are connected to different output lines. The electric generator comprises a stator and a rotor. The stator has a plurality of windings. Each winding has a plurality of phases. Each phase comprises bars connected in series. The phases have a first connection at one end, a second connection at the other end and a third connection in an intermediate position between the first and the second connection.

Converter and electric generator in which groups of windings are used to generate output voltages according to a power requirement

A converter has converting groups with a first stage connected to input lines thereof and a second stage connected to output lines. The first and second stages have positive and negative branches that are connected together.

Converter

A method for operating a matrix converter in which m phases of a generator generating alternating voltage with n (n&#x3c;m) phases of a load are alternatingly connected via a multiple number of controllable bi-directional switches arranged in an (m&#xd7;n) matrix, wherein switching over from a selected connected phase of the generator to a selected non-connected phase of the generator takes place in a controlled sequence of commutation instants of the individual switches. While being able to use low commutation frequencies and correspondingly low commutation losses adapted, improved target voltage curves or target spectra of the generated alternating voltage can be obtained by (1) calculating the output spectrum of the matrix converter based on the connectivity of the phases, on the phase relationship between input and output, and on the instants when commutations of the switches are initiated and/or on the instants when commutations of the switches are completed, by (2) assessing the influence of individual commutations or groups of commutations based on calculated deviation output spectra for deviated individual commutations or groups of commutations, and by (3) amending the sequence of commutation instants to the target voltage curve or target spectrum using the information of these calculated deviation output spectra.

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Offemont, France

Thierry Lecomte