Uninterruptive switching regulator

Claim 1

An uninterrupted switching regulator, comprising: a rectifier circuit for rectifying an alternating current from an a.c. power supply; a primary side circuit for developing a primary side high frequency pulse voltage through a primary side switching element in which a primary winding of a high-frequency transformer and the primary side switching element are connected in series to an output side of the rectifier circuit, and a switching primary winding for applying a switching control voltage to the primary side switching element is connected to the output side of the rectifier circuit; a secondary side circuit for applying a d.c. output power to a load in which a rectifying and smoothing circuit is connected to a secondary winding of said high-frequency transformer; a charge circuit connected in series to a first tertiary winding of the high-frequency transformer and including an electrical double layer capacitor or a secondary battery and a rectifying device; and a discharge circuit in which a second tertiary winding connected in series to said first tertiary winding, a tertiary side switching element and said electrical double layer capacitor or secondary battery are connected in series to each other, and a switching tertiary winding for applying a switching control voltage to the tertiary side switching element is connected thereto, for developing a primary side high-frequency pulse discharge voltage from the discharge output of the electrical double layer capacitor or the secondary battery through said tertiary side switching element; wherein an output is transmitted from the primary side and the tertiary side to the secondary side through, and said charge circuit operates when the output voltage of said rectifier circuit at the primary side exceeds a predetermined level, whereas said discharge circuit operates when it does not exceed the predetermined level.