NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Bi-directional four quadrant (BDQ4) power converter developmentThe feasibility for implementation of a concept for direct ac/dc multikilowatt power conversion with bidirectional transfer of energy was investigated. A 10 kHz current carrier was derived directly from a common 60 Hz three phase power system. This carrier was modulated to remove the 360 Hz ripple, inherent in the three phase power supply and then demodulated and processed by a high frequency filter. The resulting dc power was then supplied to a load. The process was implemented without the use of low frequency transformers and filters. This power conversion processes was reversible and can operate in the four quadrants as viewed from any of the two of the converter's ports. Areas of application include: power systems on air and spacecraft; terrestrial traction; integration of solar and wind powered systems with utility networks; HVDC; asynchronous coupling of polyphase networks; heat treatment; industrial machine drives; and power supplies for any use including instrumentation.
Document ID
19800006223
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Schwarz, F. C. (Power Electronics Associates, Inc. Lincoln, MA, United States)
Date Acquired
September 4, 2013
Publication Date
December 20, 1979
Subject Category
Energy Production And Conversion
Report/Patent Number
NASA-CR-159660
Accession Number
80N14480
Funding Number(s)
CONTRACT_GRANT: NAS3-30363
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available