A method for protecting a matrix converter against overvoltages and by means of tension in front of the direction of an active

摘要

A method for protecting a matrix converter (28) against overvoltages with nine in a 3 × 3 switch matrix that is - arranged bidirectional power switches (2), wherein either– from all input - and output potentials (7) or– in each case of all input - and output potentials (9) or– in each case of all input and one of the three output potentials (11)a maximum potential is determined, wherein on exceeding a predetermined limit value the bidirectional power switches (2) of the matrix converter (28) are controlled.