Autotransformer using printed wireboard

Details Autotransformer using printed wireboard Autotransformer using printed wireboard

2008-07-05

2010-12-28

Enad, Elvin G (Department: 2832)

Inductor devices

Coil or coil turn supports or spacers

Printed circuit-type coil

C336S123000, C336S145000, C336S147000, C336S183000, C336S198000

Reexamination Certificate

active

07859381

ABSTRACT:
An autotransformer for use in low frequency, high power applications that uses a stack of printed wire boards constructed of a top, inner, and bottom layer including electrical trace windings circumventing the transformer core and formed in the inner layer for direct thermal contact with a heat sink interface providing a uniform and consistent heat path down to the heat sink plate. The autotransformer further includes a board to board connection employing solder cups to electrically connect between predetermined printed wire board traces. The printed wire board autotransformer also may use a non-planar interface for thermal interface with a non-planar heat sink plate surface.

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patent: 7248138 (2007-07-01), Chiang et al.
patent: 2008/0231403 (2008-09-01), Hsu
patent: 03183106 (1991-08-01), None
NASA Workmanship standards Jun. 27, 2002.

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