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HARMONIC FILTER FOR MAGNETIC AMPLIFIER

United States Patent Application

20170324389
A1
View the Complete Application at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A magnetic amplifier includes a permeable core having multiple legs. Control windings wound around separate legs are spaced apart from each other and connected in series in an anti-symmetric relation. Harmonic filters are positioned adjacent to the control windings to attenuate even-ordered harmonics generated by an alternating load current passing through a portion of the legs. The control windings are configured to bias magnetic flux arising from a control current flowing through one of the control windings which is substantially equal to the biasing magnetic flux flowing into a second control winding. The flow of the control current through each of the control windings changes the reactance of the permeable core reactor by driving those portions of the permeable core that convey the biasing magnetic flux in the permeable core into saturation. The phasing of the control winding limits a voltage induced in the plurality of control windings caused by a magnetic flux passing around a portion of the permeable core.
Dimitrovski, Aleksandar D. (Oak Ridge, TN)
15/ 146,671
May 4, 2016
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT [0001] This application was made with United States government support under Contract No. DE-AC05-000R22725 awarded by the United States Department of Energy. The United States government has certain rights in these inventions.