Patent ID: 7778045

Claim:
A method for operating a Buck-Boost Converter, comprising the actions of: (a) operating a first bridge switch array, comprising bidirectional conducting and blocking switching devices, to operatively connect at least one terminal of an energy-transfer reactance to a power input, with polarity which reverses at different times, the energy-transfer reactance comprising paralleled capacitive and inductive components, which operate in a full cycle mode to output two power transfers for each cycle; (b) operating a second bridge switch array, comprising bidirectional conducting and blocking switching devices, to operatively connect at least one terminal of said energy-transfer reactance to a power output, with polarity which reverses at different times, the energy-transfer reactance comprising paralleled capacitive and inductive components, which operate in a full cycle mode to output two power transfers for each cycle; wherein said actions (a) and (b) are not performed simultaneously; and wherein each bidirectional conducting and blocking switching device is operated to block voltage and conduct current in both directions at mutually exclusive conduction intervals.