METHOD FOR CONTROLLING A MATRIX CONVERTER

摘要

The invention relates to a method for controlling a matrix converter (2) comprising nine bi-directional circuit-breakers (4) which are arranged in a 3x3 switch matrix (6). According to the invention, a commutation sequence is selected according to detected phase-to-phase input voltages and a predetermined limit value and compared with a calculated commutation sequence. If these two do not correspond, the circuit states of the calculated commutation sequence are transferred into the selected commutation sequence by re-sorting. In this way, it is possible to operate a matrix converter (2) without precise measurement of input voltages, with the risk of a commutation short circuit being reliably avoided.