Abstract: 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<m. The n phases of the load are alternatingly connected via a multiple number of controllable bi-directional switches arranged in an (m×n) matrix, whereby n phases of the generator are always connected with the load while (m?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.

Abstract: 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<m. The n phases of the load are alternatingly connected via a multiple number of controllable bi-directional switches arranged in an (m×n) matrix, whereby n phases of the generator are always connected with the load while (m?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.

Abstract: In a method for operating a matrix converter (10) in which m phases (G1, . . . ,G6) of a source (11) delivering an alternating voltage are alternatingly connected with n phases (L1, . . . ,L3) of a load (12) via a multiple number of controllable bi-directional switches (14) arranged in an (m×n) matrix, an increased performance at decreased expenditure becomes possible in that switching over from a first phase (G1) of the source (11) to a second phase (G1) of the source (11) only takes place if the condition Ik·(Vk−Vl)·Kijkl<0 is met, where Ik and Vk are the current and the voltage of the first phase (G1), Vl is the voltage of the second phase (G1) and in each instance Kijkl is a characteristic constant for the mutual inductance between the phases (G1, . . . ,G6) of the source (11) and the inductance of the load (12).

Abstract: In a method for operating a matrix converter (10) in which m phases (G1, . . . ,G6) of a source (11) delivering an alternative voltage are alternatingly connected with n phases (L1, . . .