Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Derek Albert Paice0
Date of Patent
July 6, 2010
0Patent Application Number
123787960
Date Filed
February 20, 2009
0Patent Primary Examiner
Patent abstract
A polygon connected three-phase autotransformer using six windings per phase provides a reduced power rating nine-phase power source suitable for 18-pulse AC to DC power converters. The windings are selected and connected in a manner that controls harmonic currents and minimizes total kVA rating. When the autotransformer is used to power a nine-phase AC to DC converter its kVA rating is typically less than 48% of the DC load kW. Additional isolated windings can provide means for the invention to operate as an efficient double-wound transformer.
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