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Field-Oriented Control Of Induction MotorsField-oriented control system provides for feedback control of torque or speed or both. Developed for use with commercial three-phase, 400-Hz, 208-V, 5-hp motor. Systems include resonant power supply operating at 20 kHz. Pulse-population-modulation subsystem selects individual pulses of 20-kHz single-phase waveform as needed to synthesize three waveforms of appropriate lower frequency applied to three phase windings of motor. Electric actuation systems using technology currently being built to peak powers of 70 kW. Amplitude of voltage of effective machine-frequency waveform determined by momentary frequency of pulses, while machine frequency determined by rate of repetition of overall temporal pattern of pulses. System enables independent control of both voltage and frequency.
Document ID
19930000449
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Burrows, Linda M.
(NASA Lewis Research Center, Cleveland, OH.)
Roth, Mary Ellen
(NASA Lewis Research Center, Cleveland, OH.)
Zinger, Don S.
(Akron Univ.)
Date Acquired
August 16, 2013
Publication Date
August 1, 1993
Publication Information
Publication: NASA Tech Briefs
Volume: 17
Issue: 8
ISSN: 0145-319X
Subject Category
Electronic Systems
Report/Patent Number
LEW-15335
Accession Number
93B10449
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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