Method for controlling a Vienna rectifier

摘要

The invention is an optimized method for controlling a Vienna rectifier (10), comprising the following steps:
on the basis of a characteristic vector—vector—a block (B1-B6) is selected from a plurality of blocks (B1-B6) in a space vector switching diagram for the Vienna rectifier (10),depending on the block (B1-B6) selected and its position in the space vector switching diagram, the vector is rotated through an offset angle according to the position of the block (B1-B6) in the space vector switching diagram, wherein the resulting angle of the rotated vector continues to be used as the normalized phase angle (⊖) and the block (B1) in which the rotated vector falls is designated the first block (B1),on the basis of the normalized phase angle (⊖), an upper or lower half of the first block (B1) is selected,on the basis of the absolute value of the normalized phase angle (⊖) and the vector, one of three area sections (F1-F3) of the block (B1) is selected in the first block (B1),on the basis of the area section (F1-F3) determined, subvectors (k0, k1, k2) corresponding in total to the rotated vector are determined,on the basis of the subvectors (k0, k1, k2) determined, switching times (t0, t1, t2) for triggering the switches (S1-S3) are determined.

主权项

1. A method for controlling a Vienna rectifier having three controllable switches, the method comprising:
based on a characteristic vector, selecting a block from a plurality of blocks in a space vector switching diagram for the Vienna rectifier, depending on the selected block and a position of the selected block in the space vector switching diagram, rotating the vector by an offset angle in accordance with the position of the selected block in the space vector switching diagram, using the resulting angle of the rotated vector as a normalized phase angle and designating the selected block in which the rotated vector falls as a first block, based on the normalized phase angle, selecting an upper half or a lower half of the first block, based on an absolute value of the normalized phase angle and of the vector, selecting in the first block one of three area sections of the first block, based on the selected area section, determining three subvectors which, when added together, correspond to the rotated vector, based on the determined subvectors, determining a respective switching time for each of the three determined subvectors, and triggering the three controllable switches at the respective switching times.