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. / Graduation date: 1991
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/38052 |
| Date | 01 October 1990 |
| Creators | Krishnan, Sheela |
| Contributors | Rathja, Roy |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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