Digital stabilizer for brushless doubly-fed machine Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/5425kd38p

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  • The exceptional feature of the brushless doubly-fed machine is the lack of need for frequent replacement of brushes. The inherent instability of this machine has to be overcome for its application in adjustable speed drives and variable speed generation systems. Specific objectives were: to study the characteristics of the machine pertinent to its application in adjustable speed drives and variable speed generation systems, to develop a stabilizer depending on the nature of the instability. The brushless doubly-fed machine was found to be unstable over much of the useful operating range. A digital feedback control was implemented using a combination of hardware and software elements/to stabilize the machine. The feedback system was a band pass filter. The software was developed with a processing time fast enough to match the speed of response required by the stabilizer to overcome the unstable oscillations. The performance of the machine was compared with and without the stabilizer to test its effectiveness. Stable operation was achieved over the entire operating region.
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  • File scanned at 300 ppi (Monochrome) using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 5.0 was used for pdf compression and textual OCR.
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  • description.provenance : Made available in DSpace on 2013-04-08T19:34:34Z (GMT). No. of bitstreams: 1 KrishnanSheela1991.pdf: 1627350 bytes, checksum: 3fa266262894d59d59092840be460ff4 (MD5) Previous issue date: 1990-10-01
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-04-04T19:46:27Z (GMT) No. of bitstreams: 1 KrishnanSheela1991.pdf: 1627350 bytes, checksum: 3fa266262894d59d59092840be460ff4 (MD5)
  • description.provenance : Rejected by Patricia Black(patricia.black@oregonstate.edu), reason: Insert page. on 2013-04-04T19:04:55Z (GMT)
  • description.provenance : Submitted by Kaylee Patterson (kdpscanner@gmail.com) on 2013-04-03T21:45:59Z No. of bitstreams: 1 KrishnanSheela1991.pdf: 1579625 bytes, checksum: 354c7beb99028e8e497893ec6271948a (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-04-04T16:53:52Z (GMT) No. of bitstreams: 1 KrishnanSheela1991.pdf: 1579625 bytes, checksum: 354c7beb99028e8e497893ec6271948a (MD5)
  • description.provenance : Submitted by Kaylee Patterson (kdpscanner@gmail.com) on 2013-04-04T19:08:34Z No. of bitstreams: 1 KrishnanSheela1991.pdf: 1627350 bytes, checksum: 3fa266262894d59d59092840be460ff4 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-04-08T19:34:34Z (GMT) No. of bitstreams: 1 KrishnanSheela1991.pdf: 1627350 bytes, checksum: 3fa266262894d59d59092840be460ff4 (MD5)

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