METHOD FOR CONTROLLING A THREE-PHASE VIENNA RECTIFIER WHEN A POWER SWITCH IS FAULTY

摘要

The invention relates to a method for controlling a three-phase Vienna rectifier (20), comprising three switching arms (1, 2, 3) that are each associated with one electrical phase (a, b, c), each switching arm (1, 2, 3) comprising a high-controlled power switch (M1H, M2H, M3H) connected in series with and in opposition to a low-controlled power switch (M1L, M2L, M3L); the method comprising, when a switching arm comprises a faulty switch (M2H, M2L) : - a step of calculating the duty cycles to be applied to the high- and low-controlled switches of the two functional arms according to said received voltage value between the two functional arms (V13) and according to said measured DC voltage value (VDC) such that no current flows through the faulty switching arm (2).