Design studies relating to the brushless doubly-fed automotive alternator Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/0p096b320

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • The alternators in today's automobiles are of the claw-pole or Lundell construction, which is a readily manufactured, low-cost derivative of the conventional rotating dc field synchronous generator. The efficiency of the Lundell system is low due to a complicated magnetic circuit of predominantly solid steel and a high windage rotor structure. As the number of electrical devices in a car increases, so does the demand on the generator system. The Lundell alternator is not able to meet the demands and numerous alternative systems are under investigation. This led to the development of the brushless doubly-fed alternator system with the advantages of regulation over a wide speed range, competitive system cost based on inexpensive machine construction, low rating controller, diode rectifier and robust, low maintenance configuration. The conventional alternator has only one degree of control (de excitation), whereas the doubly-fed alternator has three control quantities: excitation magnitude, frequency and phase sequence. Excitation magnitude is used to regulate the output voltage, which leaves two control parameters to optimize efficiency over the alternator speed range. Simulation tools were developed for conducting design studies on the BDFM alternator system. Various stator and rotor configurations were studied through simulation and a few prototypes were built. A proof-of-concept prototype built in an existing induction machine frame achieved comparable efficiency characteristics to the Lundell System and exceeded the Lundell performance over part of the speed range. Significant performance improvements are expected for a new, optimized prototype which will not rely on the induction machine laminations, but will utilize custom components designed for this low voltage, high frequency application. Since the increase in automotive power demand is likely to be coupled with an increase in system voltage, a 24V, 2kW alternator system is investigated and simulation results are presented.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome) using Capture Perfect 3.0 on a Canon DR-9050C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-01-09T15:58:27Z (GMT) No. of bitstreams: 1 RaviDK1993.pdf: 2826886 bytes, checksum: 6ee6bf1375d072aa45537829b065fa9f (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-01-22T22:07:25Z (GMT) No. of bitstreams: 1 RaviDK1993.pdf: 2737628 bytes, checksum: b6991b003df984770860b8ab59ca506c (MD5)
  • description.provenance : Submitted by Kirsten Clark (kcscannerosu@gmail.com) on 2013-01-22T18:54:43Z No. of bitstreams: 1 RaviDK1993.pdf: 2737628 bytes, checksum: b6991b003df984770860b8ab59ca506c (MD5)
  • description.provenance : Made available in DSpace on 2013-01-22T22:07:25Z (GMT). No. of bitstreams: 1 RaviDK1993.pdf: 2737628 bytes, checksum: b6991b003df984770860b8ab59ca506c (MD5) Previous issue date: 1992-06-08
  • description.provenance : Rejected by Patricia Black(patricia.black@oregonstate.edu), reason: Pages out of order. on 2013-01-22T16:05:36Z (GMT)
  • description.provenance : Submitted by Kirsten Clark (kcscannerosu@gmail.com) on 2013-01-08T18:36:05Z No. of bitstreams: 1 RaviDK1993.pdf: 2826886 bytes, checksum: 6ee6bf1375d072aa45537829b065fa9f (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-01-22T21:01:56Z (GMT) No. of bitstreams: 1 RaviDK1993.pdf: 2737628 bytes, checksum: b6991b003df984770860b8ab59ca506c (MD5)

Relationships

In Administrative Set:
Last modified: 08/20/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items