Patent ID: 6256213
Filing Date: 2001-07-03
Classification: H02M

Abstract:
A regulated power supply circuit arrangement comprising:a main power transformer having a delta wound primary and two secondaries, wherein first of said secondaries has a star wound configuration and second of said secondaries has a delta wound configuration;an auxiliary power transformer having a delta wound primary series connected with said main transformer primary and two secondaries parallel connected with said secondaries of said main transformer, wherein first of said secondaries has a star wound configuration and second of said secondaries has a delta wound configuration;main rectifying means coupled to said secondaries of said main transformer;auxiliary rectifying means coupled to said secondaries of said auxiliary transformer;output means coupled to said main rectifying means and said auxiliary rectifying means providing regulated DC output voltage;output reference means to provide a signal indicative of output voltage amplitude; andflyback means to transfer current from said auxiliary rectifying means to said output means;wherein said auxiliary transformer behaves as a series impedance in series with said main transformer to regulate the AC input to said main transformer.