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Steady-state and dynamic characteristics of a 20-kHz spacecraft power system - Control of harmonic resonanceA detailed computer simulation was used to illustrate the steady-state and dynamic operating characteristics of a 20-kHz resonant spacecraft power system. The simulated system consists of a parallel-connected set of DC-inductor resonant inverters (drivers), a 440-V cable, a node transformer, a 220-V cable, and a transformer-rectifier-filter (TRF) AC-to-DC receiver load. Also included in the system are a 1-kW 0.8-pf RL load and a double-LC filter connected at the receiving end of the 20-kHz AC system. The detailed computer simulation was used to illustrate the normal steady-state operating characteristics and the dynamic system performance following, for example, TRF startup. It is shown that without any filtering the given system exhibits harmonic resonances due to an interaction between the switching of the source and/or load converters and the AC system. However, the double-LC filter at the receiving-end of the AC system and harmonic traps connected in series with each of the drivers significantly reduce the harmonic distortion of the 20-kHz bus voltage. Significant additional improvement in the waveform quality can be achieved by including a double-LC filter with each driver.
Document ID
19910053378
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wasynczuk, O.
(Purdue Univ. West Lafayette, IN, United States)
Krause, P. C.
(Purdue University West Lafayette, IN, United States)
Biess, J. J.
(TRW Space and Technology Group Redondo Beach, CA, United States)
Kapustka, R.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1990
Subject Category
Spacecraft Propulsion And Power
Meeting Information
Meeting: Intersociety Energy Conversion Engineering Conference
Location: Reno, NV
Country: United States
Start Date: August 12, 1990
End Date: August 17, 1990
Accession Number
91A38001
Distribution Limits
Public
Copyright
Other

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