HF link buck-boost inverter fed BLDC derive

This paper proposes a modified configuration for the dc-ac power conversion, which reduces the number of switches without changing the principles of operation. This converter, HF link buck-boost inverter, reduces the number of switches and has all the advantages of the ac-link buck-boost inverter, including zero voltage turn on and soft turn-off of the switches, alternating link current, and the possibility of having galvanic isolation with the addition of a single-phase high-frequency transformer. This converter is an extension of the dc-dc buck-boost converter. Despite reducing the number of switches, the partial resonant time, during which no power is transferred, is as short as the original configuration. An important feature of this inverter is that it can be fabricated by IGBT modules, which are more compact and more cost-effective, compared to the discrete devices. By using reverse blocking IGBTs in the sparse configuration, the efficiency of the proposed inverter will be improved significantly. This paper evaluates the performance of the proposed inverter through MATLAB/simulink software.