MATRIX CONVERTER VARIABLE SPEED DRIVE

摘要

The invention relates to a control method implemented in a matrix converter variable speed drive, comprising: three input phases (u, v, w) connected to an alternating voltage source and three output phases (a, b, c) connected to an electric charge, nine bidirectional current and voltage electronic switches (fau, fav, faw, fbu, fbv, fbw, fcu, fcv, fcw) distributed among three switching cells (A, B, C) and to be individually controlled for connecting an output phase to any of the input phases, wherein the switching between the switches of the converter is contingent upon a real matrix of duty cycles used for obtaining an output voltage towards the charge, the real matrix of duty cycles being determined from a virtual matrix (Mv) of a virtual converter (20) comprising three switching cells (A', B', C'), one of the switching cells of the virtual converter being permanently blocked.