Electronic power supply
OwnerWalter J. Ackermanninventor
Life of this patent
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Abstract
An electronic power supply utilizes a full wave bridge rectifier circuit whose alternating current voltage source is derived from a multi-primary and multi-secondary winding transformer whose windings are selectively disposed in series or parallel circuits, thereby enabling the apparatus to be effectively employed on a wide variety of A.C. voltage sources. Two adjacent legs of the bridge rectifier employ S.C.R.'s gated simultaneously symetrically by pulses obtained from a unijunction transistor driven by the output of an operational amplifier whose input terminals are coupled to voltage and current sensing networks located at the output terminals of a filter coupled to the D.C. side of the full wave bridge.
Claims2
An electronic power supply comprising a full wave bridge rectifier having two adjacent legs thereof, utilizing a pair of silicone control rectifiers, said bridge rectifier having input and output terminals, a transformer having a pair of primary windings and a pair of secondary windings, first means to switch said primary windings in a series electrical circuit or a parallel circuit, second means to switch said secondary windings in a series electrical circuit or a parallel circuit independently operable of said first means, said secondary windings coupled to the input terminals of said bridge rectifier, a filter circuit including at least one series inductance and at least one shunt capacitance having input terminals and output terminals, said input terminals of said filter circuit coupled to said output terminals of said bridge rectifier, an amplifier, said amplifier having input terminals and output terminals, a voltage divider network, said voltage divider network coupled to said output terminals of said filter circuit, a pair of resistors, said pair of resistors coupled together in a series circuit in series with said input terminals of said filter circuit, said voltage divider network coupled to said input terminals of said amplifier, the juncture of said pair of resistors coupled to said input terminals of said amplifier, a uni-junction transistor, said uni-junction transistor having gate terminals and output terminals, said gate terminals of said uni-junction transistor coupled to said output terminals of said amplifier, a pulse transformer having a primary winding and a secondary winding, said primary winding of said pulse transformer coupled to said output terminals of said uni-junction transistor, said pair of silicone control rectifiers having gate terminals, said secondary of said pulse transformer coupled to said gate terminals.
Dependencies are inferred from the claim text.