Passivity-based control for current sharing in PFC interleaved boost converters

The parallel connection of power electronic converters has had an increasing demand due the need of higher power. A desired feature in these connections is equal and stable current sharing among the converters. However this is not possible in real systems where factors as aging or heating cause mismatch in the parameters. This paper presents a passivity-based controller design which achieves equal current sharing considering parameters uncertainty, ensures the PFC close to one with regulated DC output voltage and allows the connection of 'n' interleaved converters.