New PWM method and commutation strategy for HF-link converters for fuel cells and photovoltaics

This paper presents a new PWM method and commutation strategy for HF-link converters, which leads to safe commutation of the load current in the output bidirectional bridge. The proposed implementation is independent of the particular HF-link converter topology and bidirectional switch selection and is therefore usable at all output power levels and switching frequencies. Theoretical analysis of the approach and experimental investigation are presented to prove the feasibility of the concept.