Alstom Technology Limited

Alstom (switzerland) Ltd

Sylvie Turri

Alain Lacaze

A method for operating a matrix converter that includes converting m phases of a generator into alternating voltage with n phases of a load connected to a network, wherein n&#x3c;m. The n phases of the load are alternatingly connected via a multiple number of controllable bi-directional switches arranged in an (m&#xd7;n) matrix, whereby n phases of the generator are always connected with the load while (m&#x2212;n) phases of the generator are not connected with the load. The matrix converter may be used for at least part of the start-up process, in particular for the initial part of the start-up process of the generator reversely operating the matrix converter in cycloconverter mode using power available from the network, wherein the group of m phases of the generator are grouped in corresponding subgroups.

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Port sur Saone, France

Sylvie Turri