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A dc to dc converterThe object of the invention is to provide an improved converter for converting one direct current voltage to another. A plurality of phased square wave voltages are provided from a ring counter through amplifiers to a like plurality of output transformers. Each of these transformers has two windings, and S(1) winding and an S(2) winding. The S(1) windings are connected in series, then the S(2) windings are connected in series, and finally, the two sets of windings are connected in series. One of six SCRs is connected between each two series connected windings to a positive output terminal and one of diodes is connected between each set of two windings of a zero output terminal. By virtue of this configuration, a quite high average direct current voltage is obtained, which varies between full voltage and two-thirds full voltage rather than from full voltage to zero. Further, its variation, ripple frequency, is reduced to one-sixth of that present in a single phase system. Application to raising battery voltage for an ion propulsion system is mentioned.
Document ID
19840008385
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Willis, A. E.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Gould, J. M.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Matheney, J. L.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Garrett, H.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
September 4, 2013
Publication Date
January 17, 1984
Subject Category
Electronics And Electrical Engineering
Accession Number
84N16453
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-MFS-25430-1|US-PATENT-4,426,678
Patent Application
US-PATENT-APPL-SN-383083
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