Electric power conversion systems – Current conversion – Having plural converters for single conversion
Patent
1989-03-29
1990-04-10
Wong, Peter S.
Electric power conversion systems
Current conversion
Having plural converters for single conversion
363 71, 363 98, 21912154, 2191301, 21913033, H02M 3335
Patent
active
049165992
ABSTRACT:
A pulse-width-modulated, switching power supply has a pulse width modulator, a full bridge network driving a pulse transformer, power switching section, a high frequency power transformer, an output rectifier and an output inductor. The power switching section includes two or more H-bridge networks each preferably having four FET's. The pulse transformer, controlled by the pulse width modulator, in turn controls the switching of the H-bridge networks. This switching is simultaneous in each H-bridge network, preferably to within 50 nanoseconds. The pulse transformer windings are coaxial and short. The outputs from the H-bridge networks are applied to in-phase windings of the power transformer. The power windings are segmented and wound on cores in side-by-side relationship to produce a "finite" mutual inductance among the primaries of the power transformer. This finite inductive coupling allows variations in the H-bridge power outputs of up to one dB.
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patent: 4503316 (1985-03-01), Murase et al.
patent: 4564742 (1986-01-01), Karlsson
patent: 4695933 (1987-09-01), Nguyen et al.
patent: 4758941 (1988-07-01), Felton et al.
Pippenger, D. E. et al., Linear and Interface Circuits Applications, vol. 1 (Texas Instruments, 1985), pp. 6-1 to 6-13.
Traxler John C.
Whitham, II Richard C.
HyperPower, Inc.
Wong Peter S.
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