ABSTRACT
An extended delta cascaded phase-shifting transformer is used. Extended delta method is used to shift the phase between the secondary-side windings to achieve multiple rectification. When the phase-shifting transformer is in an Ydll connection, by adjusting the secondary-side extended delta, it is possible to locate the phase-shifting range to any angle at which the primary-side voltage lags behind the secondary-side voltage by 0°~60°.
