A New Single-phase HF-link Multilevel Inverter
Location: Brasil
Publication date: 2005-06-21
Published in: IEEE Power Electronics Specialists Conference 2005, Recife (Brazil) - PESC 2005
ref. DOI: 10.1109/PESC.2005.1581630

Local members

Joan Rocabert

PhD. Senior Researcher

External members

Beristain, J. , Bordonau, J. , Raventos, O. , Busquets, S. , Mata, M.



This paper introduces a new single-phase multilevel inverter with HF isolation and bi-directional power flow capability. The advantage is to provide compact HF isolation, without an additional dc-stage and with lower harmonic distortion in the load. Typical applications of this converter are: photovoltaic systems, fuel cell systems and small wind power systems. The topology is based on a high-frequency push-pull inverter, a high-frequency transformer and an ac/acmultilevel converter. A detailed HF-link multilevel inverter description is presented. A modulation strategy and a commutation strategy for the ac/ac converter is proposed with the benefits of soft-switching commutations with no extra components. The multilevel topology permits a significant reduction of the output filter and an improvement of the efficiency