An analysis of operating processes in a three-phase inverter with an auxiliary single-phase transformer

摘要

A three-phase inverter with an auxiliary single-phase transformer is considered, which is used for power supply systems employed in aviation. A harmonic analysis is presented, the main calculation expressions are given, and the optimum parameters of the auxiliary single-phase transformer are determined The theoretical results are verified on a prototype three-phase inverter with an output power of6 k VA, output line-to-line voltage of 208 V and frequency of 400 Hz. An analysis of the results of investigations obtained on the prototype shows that the mismatch between the theoretical and experimental data does not exceed 3-7%.