A Study on the Harmonic Reduction Technique in Three-Phase Square-Wave Inverters Formed by Single-Phase Inverters

단상 인버터로 구성된 3상 구형파 인버터의 고조파 저감기법에 관한 연구

This paper deal with the harmonic reduction technique in three-phase square-wave inverter system formed by single-phase inverter. To reduce the harmonics six single-phase inverters are used for forming multi-phase inverter and zig-zag connected output transformer for eliminating the harmonic 6(2k-1)$\pm$1 orders. And an ac filter is furnished at output side. Computer simulations show that the THD of the output voltage can be reduced immensely.