Isolation-type switching power supply

Details Isolation-type switching power supply Isolation-type switching power supply

1997-03-31

1998-12-15

Nguyen, Matthew V.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

H02M 3335

Patent

active

058503358

ABSTRACT:
A low-cost and highly reliable flyback isolation-type switching power supply comprises a main transformer and an auxiliary transformer. A secondary winding of the main transformer is connected in parallel with an input winding of the auxiliary transformer. A series network of a diode and a capacitor is connected between the terminals of an output winding of the auxiliary transformer, and a voltage corresponding to the output voltage of the power supply is obtained across the capacitor. The main transformer and the auxiliary transformer preferably share a core having a plurality of bobbin sections, with the windings of each transformer wound around respective different bobbin sections. The equivalent degree of coupling between the secondary winding and the output winding is thus sufficiently larger than the degree of coupling between the primary winding and the output winding.

REFERENCES:
patent: 3581184 (1971-05-01), Hurd
patent: 4471327 (1984-09-01), Moss
patent: 4941078 (1990-07-01), Leonardi
patent: 4984145 (1991-01-01), Dangschat et al.

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