Embodiments relate to systems and methods for selecting circuit element values for a hybrid active power filter operating over a variable frequency. In aspects, a hybrid active power filter (HAPF) circuit can eliminate current harmonics present in an AC po...

There are provided a detector and the like that are capable of conveniently detecting conductor or a circuit including a coil. The detector includes a detecting section that determines a Q value or a degree of variation thereof in a circuit including a coi...

A new method of extracting information from a current waveform for the purpose of controlling a resonant converter is presented. The method comprises sampling 3 times in half a period or sampling at 3 different positions in a sequence on different periods ...