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P-type 12-pulse auto-transformer rectifier unit (ATRU) is a very attractive harmonic solution in aviation situation for its lower volt-ampere rating of transformer compared with other multi-pulse methods. However, the input current THD of 12-pulse ATRU is about 15% larger than 10% THD requirement by the related standards. Current-injection method is an effective harmonic mitigation method for 12-pulse...
Multi-pulse Auto-Transformer Rectifier Unit (ATRU) is the most popular harmonic solution for aircraft application. The characteristic of multi-pulse ATRU under unbalanced input and open-phase condition is analyzed detailed in this paper. By a general model for all kinds of multi-pulse ATRU proposed in this paper, the output characteristics of ATRU under unbalanced input is analyzed with the asymmetric...
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