Soft switched secondary side post regulator for DC to DC...

Details Soft switched secondary side post regulator for DC to DC... Soft switched secondary side post regulator for DC to DC...

2008-07-15

2008-07-15

Sherry, Michael (Department: 2836)

Electrical transmission or interconnection systems

Plural load circuit systems

Transformer connections

C363S016000, C363S098000, C363S132000

Reexamination Certificate

active

07400061

ABSTRACT:
A high frequency, full bridge, resonant DC to DC converter provides a main DC output voltage that is regulated by adjusting the phase shift of the input power to a main input transformer and at least one additional DC output voltage that is regulated on the secondary side of the power input transformer. A main DC output voltage is regulated by a full bridge resonant switching converter with lossless switching of input power devices. At least one additional secondary winding on the transformer supplies a second DC output voltage that is regulated independently of the main DC output voltage. Two switching devices are used for each auxiliary DC output to regulate each auxiliary output voltage by adjusting the length of the on time of the pulses from the transformer's auxiliary secondary windings. Soft switching techniques are used to ensure that the switching devices turn on when the voltage across them is effectively zero.

REFERENCES:
patent: 4864479 (1989-09-01), Steigerwald et al.
patent: 5038264 (1991-08-01), Steigerwald
patent: 6504267 (2003-01-01), Giannopoulos
patent: 2002/0001210 (2002-01-01), Kuranuki et al.
Bill Andreycak, “Designing a Phase Shifted Zero Voltage Transition (ZVT) Power Converter”, Mar. 25, 1993, pp. 3-1 to 3-15.

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