Analysis of Symmetric Step-up Topology Based on a Parallel-Connected 18-pulse Auto-transformer

Abstract

For enable the multi-pulse auto-transformer rectifier unit (ATRU) can well meet a variety of step-up industrial occasions, an 18-pulse ATRU is proposed by considering in needs of small equivalent volume and simple structure. The topology of the proposed is designed, the step-up range is given, the step-up working principle is analyzed, and the relationship between the step-up factor and the equivalent volume of the used magnetic device is derived. It has high robustness and reliability.