The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 03, 1990
Filed:
Feb. 03, 1989
Eldec Corporation, Lynnwood, WA (US);
Abstract
A dual transformer device (34) for use in a power converter (30) is provided. The dual transformer device is preferably implemented as an integrated magnetics device suitable for use in high density power converters. Two transformers, T1 and T2, have series connected primary windings (300 and 302), and secondary windings (304 and 306) connected at a common node (312). T1 and T2 have magnetizing inductances, L1 and L2, that independently store energy responsive to an AC voltage, V.sub.p. Diodes, D1 and D2, operate to rectify substantially out-of-phase secondary voltages, V.sub.S1 and V.sub.S2 and produce a rectified voltage V.sub.R. D1 and D2 cause L1 and L2 to store discharge energy such that the magnitude of an output current, I5, is always equal to the sum of magnetizing currents, I.sub.L1 and I.sub.L2. An output filter (38) reduces current ripple in I5 and voltage ripple in V.sub.R. Another inductance, L3, supplies energy to an AC voltage supply (32) to reduce switching losses.