Novel Hybrid 12-Pulse Line Interphase Transformer Boost-Type Rectifier with Controlled Output Voltage

摘要

This paper describes two novel hybrid 12-pulse line interphase transformer rectifier systems with integrated single-switch or two-switch boost-type output stage. The boost stage allows to control the output voltage to a constant value independent of line voltage or output power variations. In combination with low complexity and/or high reliability the hybrid rectifier concept therefore is of potential interest for supplying electrically powered actuators of future More-Electrie-Aircrafts. The principle of operation and the dimensioning of the systems arc discussed. Furthermore, a control concept guaranteeing a symmetric distribution of the load current to the individual systems of the two-switch topology is proposed. The theoretical considerations are experimentally confirmed for a 10kW laboratory prototype. Finally, the single- and the two-switch system are comparatively evaluated concerning input current ripple, power factor, and overall efficiency.