Three-phase to nine-phase autotransformer

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United States of America Patent

PATENT NO 9966868
SERIAL NO

15591281

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Abstract

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An autotransformer for converting three-phase AC power to nine-phase AC power. The autotransformer includes three coils each having serial connected windings and non-serial connected windings. The combination of the serial and non-serial windings are interconnected to form a polygon for a total of six windings per phase, in an arrangement which reduces the power rating of an autotransformer suitable for 18-pulse AC to DC power converters. There are a plurality of direct outputs that are equal in magnitude and are out of phase with respect to the voltages at the input. The input is offset from the nine outputs to create the required phase magnitudes for DC power converters.

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Patent Owner(s)

Patent OwnerAddress
NORLAKE MANUFACTURING COMPANYNORTH RIDGEVILLE OH

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nunamaker, James Patrick Litchfield, US 2 1

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